Update version for 2.4.1 release

Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
virtio: sync the dataplane vring state to the virtqueue before virtio_save
2015-10-31 12:39:47 -05:00 · 2015-10-31 12:39:47 -05:00 · 2015-10-31 12:35:17 -05:00 · 2015-10-31 12:35:16 -05:00 · 2015-10-28 14:50:11 -05:00 · 2015-10-28 14:50:05 -05:00
4015 changed files with 167610 additions and 442475 deletions
@@ -1,2 +0,0 @@
-((c-mode . ((c-file-style . "stroustrup")
-	    (indent-tabs-mode . nil))))
@@ -5,22 +5,26 @@
 /config-target.*
 /config.status
 /config-temp
-/trace-events-all
+/trace/generated-tracers.h
+/trace/generated-tracers.c
+/trace/generated-tracers-dtrace.h
+/trace/generated-tracers.dtrace
 /trace/generated-events.h
 /trace/generated-events.c
 /trace/generated-helpers-wrappers.h
 /trace/generated-helpers.h
 /trace/generated-helpers.c
 /trace/generated-tcg-tracers.h
+/trace/generated-ust-provider.h
+/trace/generated-ust.c
 /ui/shader/texture-blit-frag.h
 /ui/shader/texture-blit-vert.h
+/libcacard/trace/generated-tracers.c
 *-timestamp
 /*-softmmu
 /*-darwin-user
 /*-linux-user
 /*-bsd-user
-/ivshmem-client
-/ivshmem-server
 /libdis*
 /libuser
 /linux-headers/asm
@@ -30,11 +34,11 @@
 /qapi-visit.[ch]
 /qapi-event.[ch]
 /qmp-commands.h
-/qmp-introspect.[ch]
 /qmp-marshal.c
 /qemu-doc.html
+/qemu-tech.html
 /qemu-doc.info
-/qemu-doc.txt
+/qemu-tech.info
 /qemu-img
 /qemu-nbd
 /qemu-options.def
@@ -45,18 +49,15 @@
 /qemu-ga
 /qemu-bridge-helper
 /qemu-monitor.texi
-/qemu-monitor-info.texi
-/qemu-version.h
-/qemu-version.h.tmp
-/module_block.h
+/qmp-commands.txt
 /vscclient
 /fsdev/virtfs-proxy-helper
 *.[1-9]
 *.a
 *.aux
 *.cp
+*.dvi
 *.exe
-*.msi
 *.dll
 *.so
 *.mo
@@ -76,6 +77,10 @@
 *.d
 !/scripts/qemu-guest-agent/fsfreeze-hook.d
 *.o
+*.lo
+*.la
+*.pc
+.libs
 .sdk
 *.gcda
 *.gcno
@@ -85,10 +90,6 @@
 /pc-bios/optionrom/linuxboot.bin
 /pc-bios/optionrom/linuxboot.raw
 /pc-bios/optionrom/linuxboot.img
-/pc-bios/optionrom/linuxboot_dma.asm
-/pc-bios/optionrom/linuxboot_dma.bin
-/pc-bios/optionrom/linuxboot_dma.raw
-/pc-bios/optionrom/linuxboot_dma.img
 /pc-bios/optionrom/multiboot.asm
 /pc-bios/optionrom/multiboot.bin
 /pc-bios/optionrom/multiboot.raw
@@ -99,35 +100,8 @@
 /pc-bios/optionrom/kvmvapic.img
 /pc-bios/s390-ccw/s390-ccw.elf
 /pc-bios/s390-ccw/s390-ccw.img
-/docs/qemu-ga-qapi.texi
-/docs/qemu-ga-ref.html
-/docs/qemu-ga-ref.info*
-/docs/qemu-ga-ref.txt
-/docs/qemu-qmp-qapi.texi
-/docs/qemu-qmp-ref.html
-/docs/qemu-qmp-ref.info*
-/docs/qemu-qmp-ref.txt
-/docs/version.texi
-*.tps
 .stgit-*
 cscope.*
 tags
 TAGS
-docker-src.*
 *~
-trace.h
-trace.c
-trace-ust.h
-trace-ust.h
-trace-dtrace.h
-trace-dtrace.dtrace
-trace-root.h
-trace-root.c
-trace-ust-root.h
-trace-ust-root.h
-trace-ust-all.h
-trace-ust-all.c
-trace-dtrace-root.h
-trace-dtrace-root.dtrace
-trace-ust-all.h
-trace-ust-all.c
@@ -31,6 +31,3 @@
 [submodule "roms/u-boot"]
 	path = roms/u-boot
 	url = git://git.qemu-project.org/u-boot.git
-[submodule "roms/skiboot"]
-	path = roms/skiboot
-	url = git://git.qemu.org/skiboot.git
@@ -1,21 +0,0 @@
-language: c
-env:
-  matrix:
-    - IMAGE=debian-armhf-cross
-      TARGET_LIST=arm-softmmu,arm-linux-user
-    - IMAGE=debian-arm64-cross
-      TARGET_LIST=aarch64-softmmu,aarch64-linux-user
-    - IMAGE=debian-s390x-cross
-      TARGET_LIST=s390x-softmmu,s390x-linux-user
-build:
-  pre_ci:
-    - make docker-image-${IMAGE}
-  pre_ci_boot:
-    image_name: qemu
-    image_tag: ${IMAGE}
-    pull: false
-    options: "-e HOME=/root"
-  ci:
-    - unset CC
-    - ./configure ${QEMU_CONFIGURE_OPTS} --target-list=${TARGET_LIST}
-    - make -j2
@@ -1,197 +1,103 @@
-sudo: false
 language: c
 python:
  - "2.4"
 compiler:
  - gcc
-cache: ccache
-addons:
-  apt:
-    packages:
-      # Build dependencies
-      - libaio-dev
-      - libattr1-dev
-      - libbrlapi-dev
-      - libcap-ng-dev
-      - libgnutls-dev
-      - libgtk-3-dev
-      - libiscsi-dev
-      - liblttng-ust-dev
-      - libnfs-dev
-      - libncurses5-dev
-      - libnss3-dev
-      - libpixman-1-dev
-      - libpng12-dev
-      - librados-dev
-      - libsdl1.2-dev
-      - libseccomp-dev
-      - libspice-protocol-dev
-      - libspice-server-dev
-      - libssh2-1-dev
-      - liburcu-dev
-      - libusb-1.0-0-dev
-      - libvte-2.90-dev
-      - sparse
-      - uuid-dev
-
-# The channel name "irc.oftc.net#qemu" is encrypted against qemu/qemu
-# to prevent IRC notifications from forks. This was created using:
-# $ travis encrypt -r "qemu/qemu" "irc.oftc.net#qemu"
+  - clang
 notifications:
  irc:
    channels:
-      - secure: "F7GDRgjuOo5IUyRLqSkmDL7kvdU4UcH3Lm/W2db2JnDHTGCqgEdaYEYKciyCLZ57vOTsTsOgesN8iUT7hNHBd1KWKjZe9KDTZWppWRYVwAwQMzVeSOsbbU4tRoJ6Pp+3qhH1Z0eGYR9ZgKYAoTumDFgSAYRp4IscKS8jkoedOqM="
+      - "irc.oftc.net#qemu"
    on_success: change
    on_failure: always
 env:
  global:
-    - TEST_CMD="make check"
+    - TEST_CMD=""
+    - EXTRA_CONFIG=""
+    # Development packages, EXTRA_PKGS saved for additional builds
+    - CORE_PKGS="libusb-1.0-0-dev libiscsi-dev librados-dev libncurses5-dev"
+    - NET_PKGS="libseccomp-dev libgnutls-dev libssh2-1-dev  libspice-server-dev libspice-protocol-dev libnss3-dev"
+    - GUI_PKGS="libgtk-3-dev libvte-2.90-dev libsdl1.2-dev libpng12-dev libpixman-1-dev"
+    - EXTRA_PKGS=""
  matrix:
-    - CONFIG=""
-    - CONFIG="--enable-debug --enable-debug-tcg --enable-trace-backends=log"
-    - CONFIG="--disable-linux-aio --disable-cap-ng --disable-attr --disable-brlapi --disable-uuid --disable-libusb"
-    - CONFIG="--enable-modules"
-    - CONFIG="--with-coroutine=ucontext"
-    - CONFIG="--with-coroutine=sigaltstack"
+    # Group major targets together with their linux-user counterparts
+    - TARGETS=alpha-softmmu,alpha-linux-user
+    - TARGETS=arm-softmmu,arm-linux-user,armeb-linux-user,aarch64-softmmu,aarch64-linux-user
+    - TARGETS=cris-softmmu,cris-linux-user
+    - TARGETS=i386-softmmu,i386-linux-user,x86_64-softmmu,x86_64-linux-user
+    - TARGETS=m68k-softmmu,m68k-linux-user
+    - TARGETS=microblaze-softmmu,microblazeel-softmmu,microblaze-linux-user,microblazeel-linux-user
+    - TARGETS=mips-softmmu,mips64-softmmu,mips64el-softmmu,mipsel-softmmu
+    - TARGETS=mips-linux-user,mips64-linux-user,mips64el-linux-user,mipsel-linux-user,mipsn32-linux-user,mipsn32el-linux-user
+    - TARGETS=or32-softmmu,or32-linux-user
+    - TARGETS=ppc-softmmu,ppc64-softmmu,ppcemb-softmmu,ppc-linux-user,ppc64-linux-user,ppc64abi32-linux-user,ppc64le-linux-user
+    - TARGETS=s390x-softmmu,s390x-linux-user
+    - TARGETS=sh4-softmmu,sh4eb-softmmu,sh4-linux-user sh4eb-linux-user
+    - TARGETS=sparc-softmmu,sparc64-softmmu,sparc-linux-user,sparc32plus-linux-user,sparc64-linux-user
+    - TARGETS=unicore32-softmmu,unicore32-linux-user
+    # Group remaining softmmu only targets into one build
+    - TARGETS=lm32-softmmu,moxie-softmmu,tricore-softmmu,xtensa-softmmu,xtensaeb-softmmu
 git:
  # we want to do this ourselves
  submodules: false
 before_install:
-  - if [ "$TRAVIS_OS_NAME" == "osx" ]; then brew update ; fi
-  - if [ "$TRAVIS_OS_NAME" == "osx" ]; then brew install libffi gettext glib pixman ; fi
  - wget -O - http://people.linaro.org/~alex.bennee/qemu-submodule-git-seed.tar.xz | tar -xvJ
  - git submodule update --init --recursive
+  - sudo apt-get update -qq
+  - sudo apt-get install -qq ${CORE_PKGS} ${NET_PKGS} ${GUI_PKGS} ${EXTRA_PKGS}
 before_script:
-  - ./configure ${CONFIG}
+  - ./configure --target-list=${TARGETS} --enable-debug-tcg ${EXTRA_CONFIG}
 script:
-  - make -j3 && ${TEST_CMD}
+  - make -j2 && ${TEST_CMD}
 matrix:
+  # We manually include a number of additional build for non-standard bits
  include:
-    # Test with CLang for compile portability
-    - env: CONFIG=""
-      compiler: clang
-    # gprof/gcov are GCC features
-    - env: CONFIG="--enable-gprof --enable-gcov --disable-pie"
+    # Make check target (we only do this once)
+    - env:
+        - TARGETS=alpha-softmmu,arm-softmmu,aarch64-softmmu,cris-softmmu,
+                  i386-softmmu,x86_64-softmmu,m68k-softmmu,microblaze-softmmu,
+                  microblazeel-softmmu,mips-softmmu,mips64-softmmu,
+                  mips64el-softmmu,mipsel-softmmu,or32-softmmu,ppc-softmmu,
+                  ppc64-softmmu,ppcemb-softmmu,s390x-softmmu,sh4-softmmu,
+                  sh4eb-softmmu,sparc-softmmu,sparc64-softmmu,
+                  unicore32-softmmu,unicore32-linux-user,
+                  lm32-softmmu,moxie-softmmu,tricore-softmmu,xtensa-softmmu,
+                  xtensaeb-softmmu
+          TEST_CMD="make check"
      compiler: gcc
-    # We manually include builds which we disable "make check" for
-    - env: CONFIG="--enable-debug --enable-tcg-interpreter"
-           TEST_CMD=""
+    # Debug related options
+    - env: TARGETS=i386-softmmu,x86_64-softmmu
+           EXTRA_CONFIG="--enable-debug"
      compiler: gcc
-    - env: CONFIG="--enable-trace-backends=simple"
-           TEST_CMD=""
+    - env: TARGETS=i386-softmmu,x86_64-softmmu
+           EXTRA_CONFIG="--enable-debug --enable-tcg-interpreter"
      compiler: gcc
-    - env: CONFIG="--enable-trace-backends=ftrace"
-           TEST_CMD=""
+    # All the extra -dev packages
+    - env: TARGETS=i386-softmmu,x86_64-softmmu
+           EXTRA_PKGS="libaio-dev libcap-ng-dev libattr1-dev libbrlapi-dev uuid-dev libusb-1.0.0-dev"
      compiler: gcc
-    - env: CONFIG="--enable-trace-backends=ust"
-           TEST_CMD=""
+    # Currently configure doesn't force --disable-pie
+    - env: TARGETS=i386-softmmu,x86_64-softmmu
+           EXTRA_CONFIG="--enable-gprof --enable-gcov --disable-pie"
      compiler: gcc
-    - env: CONFIG="--with-coroutine=gthread"
-           TEST_CMD=""
+    - env: TARGETS=i386-softmmu,x86_64-softmmu
+           EXTRA_PKGS="sparse"
+           EXTRA_CONFIG="--enable-sparse"
      compiler: gcc
-    - env: CONFIG=""
-      os: osx
-      compiler: clang
-    # Plain Trusty System Build
-    - env: CONFIG="--disable-linux-user"
-      sudo: required
-      addons:
-      dist: trusty
+    # All the trace backends (apart from dtrace)
+    - env: TARGETS=i386-softmmu,x86_64-softmmu
+           EXTRA_CONFIG="--enable-trace-backends=stderr"
      compiler: gcc
-      before_install:
-        - sudo apt-get update -qq
-        - sudo apt-get build-dep -qq qemu
-        - wget -O - http://people.linaro.org/~alex.bennee/qemu-submodule-git-seed.tar.xz | tar -xvJ
-        - git submodule update --init --recursive
-    # Plain Trusty Linux User Build
-    - env: CONFIG="--disable-system"
-      sudo: required
-      addons:
-      dist: trusty
+    - env: TARGETS=i386-softmmu,x86_64-softmmu
+           EXTRA_CONFIG="--enable-trace-backends=simple"
+      compiler: gcc
+    - env: TARGETS=i386-softmmu,x86_64-softmmu
+           EXTRA_CONFIG="--enable-trace-backends=ftrace"
+      compiler: gcc
+    - env: TARGETS=i386-softmmu,x86_64-softmmu
+          EXTRA_PKGS="liblttng-ust-dev liburcu-dev"
+          EXTRA_CONFIG="--enable-trace-backends=ust"
+      compiler: gcc
+    - env: TARGETS=i386-softmmu,x86_64-softmmu
+           EXTRA_CONFIG="--enable-modules"
      compiler: gcc
-      before_install:
-        - sudo apt-get update -qq
-        - sudo apt-get build-dep -qq qemu
-        - wget -O - http://people.linaro.org/~alex.bennee/qemu-submodule-git-seed.tar.xz | tar -xvJ
-        - git submodule update --init --recursive
-    # Trusty System build with latest stable clang
-    - sudo: required
-      addons:
-      dist: trusty
-      language: generic
-      compiler: none
-      env:
-        - COMPILER_NAME=clang CXX=clang++-3.9 CC=clang-3.9
-        - CONFIG="--disable-linux-user --cc=clang-3.9 --cxx=clang++-3.9"
-      before_install:
-        - wget -nv -O - http://llvm.org/apt/llvm-snapshot.gpg.key | sudo apt-key add -
-        - sudo apt-add-repository -y 'deb http://llvm.org/apt/trusty llvm-toolchain-trusty-3.9 main'
-        - sudo apt-get update -qq
-        - sudo apt-get install -qq -y clang-3.9
-        - sudo apt-get build-dep -qq qemu
-        - wget -O - http://people.linaro.org/~alex.bennee/qemu-submodule-git-seed.tar.xz | tar -xvJ
-        - git submodule update --init --recursive
-      before_script:
-        - ./configure ${CONFIG} || cat config.log
-    # Trusty Linux User build with latest stable clang
-    - sudo: required
-      addons:
-      dist: trusty
-      language: generic
-      compiler: none
-      env:
-        - COMPILER_NAME=clang CXX=clang++-3.9 CC=clang-3.9
-        - CONFIG="--disable-system --cc=clang-3.9 --cxx=clang++-3.9"
-      before_install:
-        - wget -nv -O - http://llvm.org/apt/llvm-snapshot.gpg.key | sudo apt-key add -
-        - sudo apt-add-repository -y 'deb http://llvm.org/apt/trusty llvm-toolchain-trusty-3.9 main'
-        - sudo apt-get update -qq
-        - sudo apt-get install -qq -y clang-3.9
-        - sudo apt-get build-dep -qq qemu
-        - wget -O - http://people.linaro.org/~alex.bennee/qemu-submodule-git-seed.tar.xz | tar -xvJ
-        - git submodule update --init --recursive
-      before_script:
-        - ./configure ${CONFIG} || cat config.log
-    # Using newer GCC with sanitizers
-    - addons:
-        apt:
-          sources:
-            # PPAs for newer toolchains
-            - ubuntu-toolchain-r-test
-          packages:
-            # Extra toolchains
-            - gcc-5
-            - g++-5
-            # Build dependencies
-            - libaio-dev
-            - libattr1-dev
-            - libbrlapi-dev
-            - libcap-ng-dev
-            - libgnutls-dev
-            - libgtk-3-dev
-            - libiscsi-dev
-            - liblttng-ust-dev
-            - libnfs-dev
-            - libncurses5-dev
-            - libnss3-dev
-            - libpixman-1-dev
-            - libpng12-dev
-            - librados-dev
-            - libsdl1.2-dev
-            - libseccomp-dev
-            - libspice-protocol-dev
-            - libspice-server-dev
-            - libssh2-1-dev
-            - liburcu-dev
-            - libusb-1.0-0-dev
-            - libvte-2.90-dev
-            - sparse
-            - uuid-dev
-      language: generic
-      compiler: none
-      env:
-        - COMPILER_NAME=gcc CXX=g++-5 CC=gcc-5
-        - CONFIG="--cc=gcc-5 --cxx=g++-5 --disable-pie --disable-linux-user --with-coroutine=gthread"
-        - TEST_CMD=""
-      before_script:
-        - ./configure ${CONFIG} --extra-cflags="-g3 -O0 -fsanitize=thread -fuse-ld=gold" || cat config.log
@@ -9,7 +9,7 @@ patches before submitting.
 Of course, the most important aspect in any coding style is whitespace.
 Crusty old coders who have trouble spotting the glasses on their noses
 can tell the difference between a tab and eight spaces from a distance
-of approximately fifteen parsecs.  Many a flamewar has been fought and
+of approximately fifteen parsecs.  Many a flamewar have been fought and
 lost on this issue.

 QEMU indents are four spaces.  Tabs are never used, except in Makefiles
@@ -31,11 +31,7 @@ Do not leave whitespace dangling off the ends of lines.

 2. Line width

-Lines should be 80 characters; try not to make them longer.
-
-Sometimes it is hard to do, especially when dealing with QEMU subsystems
-that use long function or symbol names.  Even in that case, do not make
-lines much longer than 80 characters.
+Lines are 80 characters; not longer.

 Rationale:
 - Some people like to tile their 24" screens with a 6x4 matrix of 80x24
@@ -43,8 +39,6 @@ Rationale:
   let them keep doing it.
 - Code and especially patches is much more readable if limited to a sane
   line length.  Eighty is traditional.
- - The four-space indentation makes the most common excuse ("But look
-   at all that white space on the left!") moot.
 - It is the QEMU coding style.

 3. Naming
@@ -93,15 +87,10 @@ Furthermore, it is the QEMU coding style.

 5. Declarations

-Mixed declarations (interleaving statements and declarations within
-blocks) are generally not allowed; declarations should be at the beginning
-of blocks.
-
-Every now and then, an exception is made for declarations inside a
-#ifdef or #ifndef block: if the code looks nicer, such declarations can
-be placed at the top of the block even if there are statements above.
-On the other hand, however, it's often best to move that #ifdef/#ifndef
-block to a separate function altogether.
+Mixed declarations (interleaving statements and declarations within blocks)
+are not allowed; declarations should be at the beginning of blocks.  In other
+words, the code should not generate warnings if using GCC's
+-Wdeclaration-after-statement option.

 6. Conditional statements

@@ -116,10 +105,3 @@ if (a == 1) {
 Rationale: Yoda conditions (as in 'if (1 == a)') are awkward to read.
 Besides, good compilers already warn users when '==' is mis-typed as '=',
 even when the constant is on the right.
-
-7. Comment style
-
-We use traditional C-style /* */ comments and avoid // comments.
-
-Rationale: The // form is valid in C99, so this is purely a matter of
-consistency of style. The checkpatch script will warn you about this.
@@ -1,28 +1,10 @@
 1. Preprocessor

-1.1. Variadic macros
-
 For variadic macros, stick with this C99-like syntax:

 #define DPRINTF(fmt, ...)                                       \
    do { printf("IRQ: " fmt, ## __VA_ARGS__); } while (0)

-1.2. Include directives
-
-Order include directives as follows:
-
-#include "qemu/osdep.h"  /* Always first... */
-#include <...>           /* then system headers... */
-#include "..."           /* and finally QEMU headers. */
-
-The "qemu/osdep.h" header contains preprocessor macros that affect the behavior
-of core system headers like <stdint.h>.  It must be the first include so that
-core system headers included by external libraries get the preprocessor macros
-that QEMU depends on.
-
-Do not include "qemu/osdep.h" from header files since the .c file will have
-already included it.
-
 2. C types

 It should be common sense to use the right type, but we have collected
@@ -175,62 +157,3 @@ painful. These are:
 * you may assume that integers are 2s complement representation
 * you may assume that right shift of a signed integer duplicates
   the sign bit (ie it is an arithmetic shift, not a logical shift)
-
-In addition, QEMU assumes that the compiler does not use the latitude
-given in C99 and C11 to treat aspects of signed '<<' as undefined, as
-documented in the GNU Compiler Collection manual starting at version 4.0.
-
-7. Error handling and reporting
-
-7.1 Reporting errors to the human user
-
-Do not use printf(), fprintf() or monitor_printf().  Instead, use
-error_report() or error_vreport() from error-report.h.  This ensures the
-error is reported in the right place (current monitor or stderr), and in
-a uniform format.
-
-Use error_printf() & friends to print additional information.
-
-error_report() prints the current location.  In certain common cases
-like command line parsing, the current location is tracked
-automatically.  To manipulate it manually, use the loc_*() from
-error-report.h.
-
-7.2 Propagating errors
-
-An error can't always be reported to the user right where it's detected,
-but often needs to be propagated up the call chain to a place that can
-handle it.  This can be done in various ways.
-
-The most flexible one is Error objects.  See error.h for usage
-information.
-
-Use the simplest suitable method to communicate success / failure to
-callers.  Stick to common methods: non-negative on success / -1 on
-error, non-negative / -errno, non-null / null, or Error objects.
-
-Example: when a function returns a non-null pointer on success, and it
-can fail only in one way (as far as the caller is concerned), returning
-null on failure is just fine, and certainly simpler and a lot easier on
-the eyes than propagating an Error object through an Error ** parameter.
-
-Example: when a function's callers need to report details on failure
-only the function really knows, use Error **, and set suitable errors.
-
-Do not report an error to the user when you're also returning an error
-for somebody else to handle.  Leave the reporting to the place that
-consumes the error returned.
-
-7.3 Handling errors
-
-Calling exit() is fine when handling configuration errors during
-startup.  It's problematic during normal operation.  In particular,
-monitor commands should never exit().
-
-Do not call exit() or abort() to handle an error that can be triggered
-by the guest (e.g., some unimplemented corner case in guest code
-translation or device emulation).  Guests should not be able to
-terminate QEMU.
-
-Note that &error_fatal is just another way to exit(1), and &error_abort
-is just another way to abort().
@@ -6,7 +6,7 @@ BUILD_DIR=$(CURDIR)
 # Before including a proper config-host.mak, assume we are in the source tree
 SRC_PATH=.

-UNCHECKED_GOALS := %clean TAGS cscope ctags docker docker-%
+UNCHECKED_GOALS := %clean TAGS cscope ctags

 # All following code might depend on configuration variables
 ifneq ($(wildcard config-host.mak),)
@@ -26,12 +26,12 @@ endif

 CONFIG_SOFTMMU := $(if $(filter %-softmmu,$(TARGET_DIRS)),y)
 CONFIG_USER_ONLY := $(if $(filter %-user,$(TARGET_DIRS)),y)
-CONFIG_XEN := $(CONFIG_XEN_BACKEND)
 CONFIG_ALL=y
 -include config-all-devices.mak
 -include config-all-disas.mak

-config-host.mak: $(SRC_PATH)/configure $(SRC_PATH)/pc-bios
+include $(SRC_PATH)/rules.mak
+config-host.mak: $(SRC_PATH)/configure
 	@echo $@ is out-of-date, running configure
 	@# TODO: The next lines include code which supports a smooth
 	@# transition from old configurations without config.status.
@@ -49,155 +49,37 @@ ifneq ($(filter-out $(UNCHECKED_GOALS),$(MAKECMDGOALS)),$(if $(MAKECMDGOALS),,fa
 endif
 endif

-include $(SRC_PATH)/rules.mak
+GENERATED_HEADERS = config-host.h qemu-options.def
+GENERATED_HEADERS += qmp-commands.h qapi-types.h qapi-visit.h qapi-event.h
+GENERATED_SOURCES += qmp-marshal.c qapi-types.c qapi-visit.c qapi-event.c

-GENERATED_FILES = qemu-version.h config-host.h qemu-options.def
-GENERATED_FILES += qmp-commands.h qapi-types.h qapi-visit.h qapi-event.h
-GENERATED_FILES += qmp-marshal.c qapi-types.c qapi-visit.c qapi-event.c
-GENERATED_FILES += qmp-introspect.h
-GENERATED_FILES += qmp-introspect.c
+GENERATED_HEADERS += trace/generated-events.h
+GENERATED_SOURCES += trace/generated-events.c

-GENERATED_FILES += trace/generated-tcg-tracers.h
-
-GENERATED_FILES += trace/generated-helpers-wrappers.h
-GENERATED_FILES += trace/generated-helpers.h
-GENERATED_FILES += trace/generated-helpers.c
-
-ifdef CONFIG_TRACE_UST
-GENERATED_FILES += trace-ust-all.h
-GENERATED_FILES += trace-ust-all.c
+GENERATED_HEADERS += trace/generated-tracers.h
+ifeq ($(findstring dtrace,$(TRACE_BACKENDS)),dtrace)
+GENERATED_HEADERS += trace/generated-tracers-dtrace.h
 endif
+GENERATED_SOURCES += trace/generated-tracers.c

-GENERATED_FILES += module_block.h
+GENERATED_HEADERS += trace/generated-tcg-tracers.h

-TRACE_HEADERS = trace-root.h $(trace-events-subdirs:%=%/trace.h)
-TRACE_SOURCES = trace-root.c $(trace-events-subdirs:%=%/trace.c)
-TRACE_DTRACE =
-ifdef CONFIG_TRACE_DTRACE
-TRACE_HEADERS += trace-dtrace-root.h $(trace-events-subdirs:%=%/trace-dtrace.h)
-TRACE_DTRACE += trace-dtrace-root.dtrace $(trace-events-subdirs:%=%/trace-dtrace.dtrace)
+GENERATED_HEADERS += trace/generated-helpers-wrappers.h
+GENERATED_HEADERS += trace/generated-helpers.h
+GENERATED_SOURCES += trace/generated-helpers.c
+
+ifeq ($(findstring ust,$(TRACE_BACKENDS)),ust)
+GENERATED_HEADERS += trace/generated-ust-provider.h
+GENERATED_SOURCES += trace/generated-ust.c
 endif
-ifdef CONFIG_TRACE_UST
-TRACE_HEADERS += trace-ust-root.h $(trace-events-subdirs:%=%/trace-ust.h)
-endif
-
-GENERATED_FILES += $(TRACE_HEADERS)
-GENERATED_FILES += $(TRACE_SOURCES)
-GENERATED_FILES += $(BUILD_DIR)/trace-events-all
-
-trace-group-name = $(shell dirname $1 | sed -e 's/[^a-zA-Z0-9]/_/g')
-
-tracetool-y = $(SRC_PATH)/scripts/tracetool.py
-tracetool-y += $(shell find $(SRC_PATH)/scripts/tracetool -name "*.py")
-
-%/trace.h: %/trace.h-timestamp
-	@cmp $< $@ >/dev/null 2>&1 || cp $< $@
-%/trace.h-timestamp: $(SRC_PATH)/%/trace-events $(tracetool-y)
-	$(call quiet-command,$(TRACETOOL) \
-		--group=$(call trace-group-name,$@) \
-		--format=h \
-		--backends=$(TRACE_BACKENDS) \
-		$< > $@,"GEN","$(@:%-timestamp=%)")
-
-%/trace.c: %/trace.c-timestamp
-	@cmp $< $@ >/dev/null 2>&1 || cp $< $@
-%/trace.c-timestamp: $(SRC_PATH)/%/trace-events $(tracetool-y)
-	$(call quiet-command,$(TRACETOOL) \
-		--group=$(call trace-group-name,$@) \
-		--format=c \
-		--backends=$(TRACE_BACKENDS) \
-		$< > $@,"GEN","$(@:%-timestamp=%)")
-
-%/trace-ust.h: %/trace-ust.h-timestamp
-	@cmp $< $@ >/dev/null 2>&1 || cp $< $@
-%/trace-ust.h-timestamp: $(SRC_PATH)/%/trace-events $(tracetool-y)
-	$(call quiet-command,$(TRACETOOL) \
-		--group=$(call trace-group-name,$@) \
-		--format=ust-events-h \
-		--backends=$(TRACE_BACKENDS) \
-		$< > $@,"GEN","$(@:%-timestamp=%)")
-
-%/trace-dtrace.dtrace: %/trace-dtrace.dtrace-timestamp
-	@cmp $< $@ >/dev/null 2>&1 || cp $< $@
-%/trace-dtrace.dtrace-timestamp: $(SRC_PATH)/%/trace-events $(BUILD_DIR)/config-host.mak $(tracetool-y)
-	$(call quiet-command,$(TRACETOOL) \
-		--group=$(call trace-group-name,$@) \
-		--format=d \
-		--backends=$(TRACE_BACKENDS) \
-		$< > $@,"GEN","$(@:%-timestamp=%)")
-
-%/trace-dtrace.h: %/trace-dtrace.dtrace $(tracetool-y)
-	$(call quiet-command,dtrace -o $@ -h -s $<, "GEN","$@")
-
-%/trace-dtrace.o: %/trace-dtrace.dtrace $(tracetool-y)
-
-
-trace-root.h: trace-root.h-timestamp
-	@cmp $< $@ >/dev/null 2>&1 || cp $< $@
-trace-root.h-timestamp: $(SRC_PATH)/trace-events $(tracetool-y)
-	$(call quiet-command,$(TRACETOOL) \
-		--group=root \
-		--format=h \
-		--backends=$(TRACE_BACKENDS) \
-		$< > $@,"GEN","$(@:%-timestamp=%)")
-
-trace-root.c: trace-root.c-timestamp
-	@cmp $< $@ >/dev/null 2>&1 || cp $< $@
-trace-root.c-timestamp: $(SRC_PATH)/trace-events $(tracetool-y)
-	$(call quiet-command,$(TRACETOOL) \
-		--group=root \
-		--format=c \
-		--backends=$(TRACE_BACKENDS) \
-		$< > $@,"GEN","$(@:%-timestamp=%)")
-
-trace-ust-root.h: trace-ust-root.h-timestamp
-	@cmp $< $@ >/dev/null 2>&1 || cp $< $@
-trace-ust-root.h-timestamp: $(SRC_PATH)/trace-events $(tracetool-y)
-	$(call quiet-command,$(TRACETOOL) \
-		--group=root \
-		--format=ust-events-h \
-		--backends=$(TRACE_BACKENDS) \
-		$< > $@,"GEN","$(@:%-timestamp=%)")
-
-trace-ust-all.h: trace-ust-all.h-timestamp
-	@cmp $< $@ >/dev/null 2>&1 || cp $< $@
-trace-ust-all.h-timestamp: $(trace-events-files) $(tracetool-y)
-	$(call quiet-command,$(TRACETOOL) \
-		--group=all \
-		--format=ust-events-h \
-		--backends=$(TRACE_BACKENDS) \
-		$(trace-events-files) > $@,"GEN","$(@:%-timestamp=%)")
-
-trace-ust-all.c: trace-ust-all.c-timestamp
-	@cmp $< $@ >/dev/null 2>&1 || cp $< $@
-trace-ust-all.c-timestamp: $(trace-events-files) $(tracetool-y)
-	$(call quiet-command,$(TRACETOOL) \
-		--group=all \
-		--format=ust-events-c \
-		--backends=$(TRACE_BACKENDS) \
-		$(trace-events-files) > $@,"GEN","$(@:%-timestamp=%)")
-
-trace-dtrace-root.dtrace: trace-dtrace-root.dtrace-timestamp
-	@cmp $< $@ >/dev/null 2>&1 || cp $< $@
-trace-dtrace-root.dtrace-timestamp: $(SRC_PATH)/trace-events $(BUILD_DIR)/config-host.mak $(tracetool-y)
-	$(call quiet-command,$(TRACETOOL) \
-		--group=root \
-		--format=d \
-		--backends=$(TRACE_BACKENDS) \
-		$< > $@,"GEN","$(@:%-timestamp=%)")
-
-trace-dtrace-root.h: trace-dtrace-root.dtrace
-	$(call quiet-command,dtrace -o $@ -h -s $<, "GEN","$@")
-
-trace-dtrace-root.o: trace-dtrace-root.dtrace

 # Don't try to regenerate Makefile or configure
 # We don't generate any of them
 Makefile: ;
 configure: ;

-.PHONY: all clean cscope distclean html info install install-doc \
-	pdf txt recurse-all speed test dist msi FORCE
+.PHONY: all clean cscope distclean dvi html info install install-doc \
+	pdf recurse-all speed test dist msi

 $(call set-vpath, $(SRC_PATH))

@@ -206,9 +88,10 @@ LIBS+=-lz $(LIBS_TOOLS)
 HELPERS-$(CONFIG_LINUX) = qemu-bridge-helper$(EXESUF)

 ifdef BUILD_DOCS
-DOCS=qemu-doc.html qemu-doc.txt qemu.1 qemu-img.1 qemu-nbd.8 qemu-ga.8
-DOCS+=docs/qemu-qmp-ref.html docs/qemu-qmp-ref.txt docs/qemu-qmp-ref.7
-DOCS+=docs/qemu-ga-ref.html docs/qemu-ga-ref.txt docs/qemu-ga-ref.7
+DOCS=qemu-doc.html qemu-tech.html qemu.1 qemu-img.1 qemu-nbd.8 qmp-commands.txt
+ifdef CONFIG_LINUX
+DOCS+=kvm_stat.1
+endif
 ifdef CONFIG_VIRTFS
 DOCS+=fsdev/virtfs-proxy-helper.1
 endif
@@ -222,20 +105,20 @@ SUBDIR_DEVICES_MAK_DEP=$(patsubst %, %-config-devices.mak.d, $(TARGET_DIRS))

 ifeq ($(SUBDIR_DEVICES_MAK),)
 config-all-devices.mak:
-	$(call quiet-command,echo '# no devices' > $@,"GEN","$@")
+	$(call quiet-command,echo '# no devices' > $@,"  GEN   $@")
 else
 config-all-devices.mak: $(SUBDIR_DEVICES_MAK)
 	$(call quiet-command, sed -n \
             's|^\([^=]*\)=\(.*\)$$|\1:=$$(findstring y,$$(\1)\2)|p' \
             $(SUBDIR_DEVICES_MAK) | sort -u > $@, \
-             "GEN","$@")
+             "  GEN   $@")
 endif

 -include $(SUBDIR_DEVICES_MAK_DEP)

-%/config-devices.mak: default-configs/%.mak $(SRC_PATH)/scripts/make_device_config.sh
+%/config-devices.mak: default-configs/%.mak
 	$(call quiet-command, \
-            $(SHELL) $(SRC_PATH)/scripts/make_device_config.sh $< $*-config-devices.mak.d $@ > $@.tmp,"GEN","$@.tmp")
+            $(SHELL) $(SRC_PATH)/scripts/make_device_config.sh $< $*-config-devices.mak.d $@ > $@.tmp, "  GEN   $@.tmp")
 	$(call quiet-command, if test -f $@; then \
 	  if cmp -s $@.old $@; then \
 	    mv $@.tmp $@; \
@@ -252,7 +135,7 @@ endif
 	 else \
 	  mv $@.tmp $@; \
 	  cp -p $@ $@.old; \
-	 fi,"GEN","$@");
+	 fi, "  GEN   $@");

 defconfig:
 	rm -f config-all-devices.mak $(SUBDIR_DEVICES_MAK)
@@ -263,64 +146,32 @@ endif

 dummy := $(call unnest-vars,, \
                stub-obj-y \
-                chardev-obj-y \
                util-obj-y \
                qga-obj-y \
-                ivshmem-client-obj-y \
-                ivshmem-server-obj-y \
-                libvhost-user-obj-y \
                qga-vss-dll-obj-y \
                block-obj-y \
                block-obj-m \
-                crypto-obj-y \
-                crypto-aes-obj-y \
-                qom-obj-y \
-                io-obj-y \
                common-obj-y \
-                common-obj-m \
-                trace-obj-y)
+                common-obj-m)

 ifneq ($(wildcard config-host.mak),)
-include $(SRC_PATH)/tests/Makefile.include
+include $(SRC_PATH)/tests/Makefile
+endif
+ifeq ($(CONFIG_SMARTCARD_NSS),y)
+include $(SRC_PATH)/libcacard/Makefile
 endif

 all: $(DOCS) $(TOOLS) $(HELPERS-y) recurse-all modules

-qemu-version.h: FORCE
-	$(call quiet-command, \
-		(cd $(SRC_PATH); \
-		printf '#define QEMU_PKGVERSION '; \
-		if test -n "$(PKGVERSION)"; then \
-			printf '"$(PKGVERSION)"\n'; \
-		else \
-			if test -d .git; then \
-				printf '" ('; \
-				git describe --match 'v*' 2>/dev/null | tr -d '\n'; \
-				if ! git diff-index --quiet HEAD &>/dev/null; then \
-					printf -- '-dirty'; \
-				fi; \
-				printf ')"\n'; \
-			else \
-				printf '""\n'; \
-			fi; \
-		fi) > $@.tmp)
-	$(call quiet-command, if ! cmp -s $@ $@.tmp; then \
-	  mv $@.tmp $@; \
-	 else \
-	  rm $@.tmp; \
-	 fi)
-
 config-host.h: config-host.h-timestamp
 config-host.h-timestamp: config-host.mak
-qemu-options.def: $(SRC_PATH)/qemu-options.hx $(SRC_PATH)/scripts/hxtool
-	$(call quiet-command,sh $(SRC_PATH)/scripts/hxtool -h < $< > $@,"GEN","$@")
+qemu-options.def: $(SRC_PATH)/qemu-options.hx
+	$(call quiet-command,sh $(SRC_PATH)/scripts/hxtool -h < $< > $@,"  GEN   $@")

 SUBDIR_RULES=$(patsubst %,subdir-%, $(TARGET_DIRS))
 SOFTMMU_SUBDIR_RULES=$(filter %-softmmu,$(SUBDIR_RULES))

 $(SOFTMMU_SUBDIR_RULES): $(block-obj-y)
-$(SOFTMMU_SUBDIR_RULES): $(crypto-obj-y)
-$(SOFTMMU_SUBDIR_RULES): $(io-obj-y)
 $(SOFTMMU_SUBDIR_RULES): config-all-devices.mak

 subdir-%:
@@ -345,22 +196,22 @@ subdir-dtc:dtc/libfdt dtc/tests
 dtc/%:
 	mkdir -p $@

-$(SUBDIR_RULES): libqemuutil.a libqemustub.a $(common-obj-y) $(chardev-obj-y) \
-	$(qom-obj-y) $(crypto-aes-obj-$(CONFIG_USER_ONLY)) $(trace-obj-y)
+$(SUBDIR_RULES): libqemuutil.a libqemustub.a $(common-obj-y)

 ROMSUBDIR_RULES=$(patsubst %,romsubdir-%, $(ROMS))
-# Only keep -O and -g cflags
 romsubdir-%:
-	$(call quiet-command,$(MAKE) $(SUBDIR_MAKEFLAGS) -C pc-bios/$* V="$(V)" TARGET_DIR="$*/" CFLAGS="$(filter -O% -g%,$(CFLAGS))",)
+	$(call quiet-command,$(MAKE) $(SUBDIR_MAKEFLAGS) -C pc-bios/$* V="$(V)" TARGET_DIR="$*/",)

 ALL_SUBDIRS=$(TARGET_DIRS) $(patsubst %,pc-bios/%, $(ROMS))

 recurse-all: $(SUBDIR_RULES) $(ROMSUBDIR_RULES)

-$(BUILD_DIR)/version.o: $(SRC_PATH)/version.rc config-host.h
-	$(call quiet-command,$(WINDRES) -I$(BUILD_DIR) -o $@ $<,"RC","version.o")
+$(BUILD_DIR)/version.o: $(SRC_PATH)/version.rc config-host.h | $(BUILD_DIR)/version.lo
+	$(call quiet-command,$(WINDRES) -I$(BUILD_DIR) -o $@ $<,"  RC    version.o")
+$(BUILD_DIR)/version.lo: $(SRC_PATH)/version.rc config-host.h
+	$(call quiet-command,$(WINDRES) -I$(BUILD_DIR) -o $@ $<,"  RC    version.lo")

-Makefile: $(version-obj-y)
+Makefile: $(version-obj-y) $(version-lobj-y)

 ######################################################################
 # Build libraries
@@ -368,23 +219,24 @@ Makefile: $(version-obj-y)
 libqemustub.a: $(stub-obj-y)
 libqemuutil.a: $(util-obj-y)

-######################################################################
+block-modules = $(foreach o,$(block-obj-m),"$(basename $(subst /,-,$o))",) NULL
+util/module.o-cflags = -D'CONFIG_BLOCK_MODULES=$(block-modules)'

-COMMON_LDADDS = $(trace-obj-y) libqemuutil.a libqemustub.a
+######################################################################

 qemu-img.o: qemu-img-cmds.h

-qemu-img$(EXESUF): qemu-img.o $(block-obj-y) $(crypto-obj-y) $(io-obj-y) $(qom-obj-y) $(COMMON_LDADDS)
-qemu-nbd$(EXESUF): qemu-nbd.o $(block-obj-y) $(crypto-obj-y) $(io-obj-y) $(qom-obj-y) $(COMMON_LDADDS)
-qemu-io$(EXESUF): qemu-io.o $(block-obj-y) $(crypto-obj-y) $(io-obj-y) $(qom-obj-y) $(COMMON_LDADDS)
+qemu-img$(EXESUF): qemu-img.o $(block-obj-y) libqemuutil.a libqemustub.a
+qemu-nbd$(EXESUF): qemu-nbd.o $(block-obj-y) libqemuutil.a libqemustub.a
+qemu-io$(EXESUF): qemu-io.o $(block-obj-y) libqemuutil.a libqemustub.a

-qemu-bridge-helper$(EXESUF): qemu-bridge-helper.o $(COMMON_LDADDS)
+qemu-bridge-helper$(EXESUF): qemu-bridge-helper.o

-fsdev/virtfs-proxy-helper$(EXESUF): fsdev/virtfs-proxy-helper.o fsdev/9p-marshal.o fsdev/9p-iov-marshal.o $(COMMON_LDADDS)
+fsdev/virtfs-proxy-helper$(EXESUF): fsdev/virtfs-proxy-helper.o fsdev/virtio-9p-marshal.o libqemuutil.a libqemustub.a
 fsdev/virtfs-proxy-helper$(EXESUF): LIBS += -lcap

-qemu-img-cmds.h: $(SRC_PATH)/qemu-img-cmds.hx $(SRC_PATH)/scripts/hxtool
-	$(call quiet-command,sh $(SRC_PATH)/scripts/hxtool -h < $< > $@,"GEN","$@")
+qemu-img-cmds.h: $(SRC_PATH)/qemu-img-cmds.hx
+	$(call quiet-command,sh $(SRC_PATH)/scripts/hxtool -h < $< > $@,"  GEN   $@")

 qemu-ga$(EXESUF): LIBS = $(LIBS_QGA)
 qemu-ga$(EXESUF): QEMU_CFLAGS += -I qga/qapi-generated
@@ -397,109 +249,92 @@ qga/qapi-generated/qga-qapi-types.c qga/qapi-generated/qga-qapi-types.h :\
 $(SRC_PATH)/qga/qapi-schema.json $(SRC_PATH)/scripts/qapi-types.py $(qapi-py)
 	$(call quiet-command,$(PYTHON) $(SRC_PATH)/scripts/qapi-types.py \
 		$(gen-out-type) -o qga/qapi-generated -p "qga-" $<, \
-		"GEN","$@")
+		"  GEN   $@")
 qga/qapi-generated/qga-qapi-visit.c qga/qapi-generated/qga-qapi-visit.h :\
 $(SRC_PATH)/qga/qapi-schema.json $(SRC_PATH)/scripts/qapi-visit.py $(qapi-py)
 	$(call quiet-command,$(PYTHON) $(SRC_PATH)/scripts/qapi-visit.py \
 		$(gen-out-type) -o qga/qapi-generated -p "qga-" $<, \
-		"GEN","$@")
+		"  GEN   $@")
 qga/qapi-generated/qga-qmp-commands.h qga/qapi-generated/qga-qmp-marshal.c :\
 $(SRC_PATH)/qga/qapi-schema.json $(SRC_PATH)/scripts/qapi-commands.py $(qapi-py)
 	$(call quiet-command,$(PYTHON) $(SRC_PATH)/scripts/qapi-commands.py \
 		$(gen-out-type) -o qga/qapi-generated -p "qga-" $<, \
-		"GEN","$@")
+		"  GEN   $@")

 qapi-modules = $(SRC_PATH)/qapi-schema.json $(SRC_PATH)/qapi/common.json \
               $(SRC_PATH)/qapi/block.json $(SRC_PATH)/qapi/block-core.json \
-               $(SRC_PATH)/qapi/event.json $(SRC_PATH)/qapi/introspect.json \
-               $(SRC_PATH)/qapi/crypto.json $(SRC_PATH)/qapi/rocker.json \
-               $(SRC_PATH)/qapi/trace.json
+               $(SRC_PATH)/qapi/event.json

 qapi-types.c qapi-types.h :\
 $(qapi-modules) $(SRC_PATH)/scripts/qapi-types.py $(qapi-py)
 	$(call quiet-command,$(PYTHON) $(SRC_PATH)/scripts/qapi-types.py \
 		$(gen-out-type) -o "." -b $<, \
-		"GEN","$@")
+		"  GEN   $@")
 qapi-visit.c qapi-visit.h :\
 $(qapi-modules) $(SRC_PATH)/scripts/qapi-visit.py $(qapi-py)
 	$(call quiet-command,$(PYTHON) $(SRC_PATH)/scripts/qapi-visit.py \
 		$(gen-out-type) -o "." -b $<, \
-		"GEN","$@")
+		"  GEN   $@")
 qapi-event.c qapi-event.h :\
 $(qapi-modules) $(SRC_PATH)/scripts/qapi-event.py $(qapi-py)
 	$(call quiet-command,$(PYTHON) $(SRC_PATH)/scripts/qapi-event.py \
 		$(gen-out-type) -o "." $<, \
-		"GEN","$@")
+		"  GEN   $@")
 qmp-commands.h qmp-marshal.c :\
 $(qapi-modules) $(SRC_PATH)/scripts/qapi-commands.py $(qapi-py)
 	$(call quiet-command,$(PYTHON) $(SRC_PATH)/scripts/qapi-commands.py \
-		$(gen-out-type) -o "." $<, \
-		"GEN","$@")
-qmp-introspect.h qmp-introspect.c :\
-$(qapi-modules) $(SRC_PATH)/scripts/qapi-introspect.py $(qapi-py)
-	$(call quiet-command,$(PYTHON) $(SRC_PATH)/scripts/qapi-introspect.py \
-		$(gen-out-type) -o "." $<, \
-		"GEN","$@")
+		$(gen-out-type) -o "." -m $<, \
+		"  GEN   $@")

 QGALIB_GEN=$(addprefix qga/qapi-generated/, qga-qapi-types.h qga-qapi-visit.h qga-qmp-commands.h)
 $(qga-obj-y) qemu-ga.o: $(QGALIB_GEN)

-qemu-ga$(EXESUF): $(qga-obj-y) $(COMMON_LDADDS)
+qemu-ga$(EXESUF): $(qga-obj-y) libqemuutil.a libqemustub.a
 	$(call LINK, $^)

 ifdef QEMU_GA_MSI_ENABLED
 QEMU_GA_MSI=qemu-ga-$(ARCH).msi

-msi: $(QEMU_GA_MSI)
+msi: ${QEMU_GA_MSI}

-$(QEMU_GA_MSI): qemu-ga.exe $(QGA_VSS_PROVIDER)
+$(QEMU_GA_MSI): qemu-ga.exe
+
+ifdef QEMU_GA_MSI_WITH_VSS
+$(QEMU_GA_MSI): qga/vss-win32/qga-vss.dll
+endif

 $(QEMU_GA_MSI): config-host.mak

-$(QEMU_GA_MSI):  $(SRC_PATH)/qga/installer/qemu-ga.wxs
-	$(call quiet-command,QEMU_GA_VERSION="$(QEMU_GA_VERSION)" QEMU_GA_MANUFACTURER="$(QEMU_GA_MANUFACTURER)" QEMU_GA_DISTRO="$(QEMU_GA_DISTRO)" BUILD_DIR="$(BUILD_DIR)" \
-	wixl -o $@ $(QEMU_GA_MSI_ARCH) $(QEMU_GA_MSI_WITH_VSS) $(QEMU_GA_MSI_MINGW_DLL_PATH) $<,"WIXL","$@")
+$(QEMU_GA_MSI):  qga/installer/qemu-ga.wxs
+	$(call quiet-command,QEMU_GA_VERSION="$(QEMU_GA_VERSION)" QEMU_GA_MANUFACTURER="$(QEMU_GA_MANUFACTURER)" QEMU_GA_DISTRO="$(QEMU_GA_DISTRO)" \
+	wixl -o $@ $(QEMU_GA_MSI_ARCH) $(QEMU_GA_MSI_WITH_VSS) $(QEMU_GA_MSI_MINGW_DLL_PATH) $<, "  WIXL  $@")
 else
 msi:
-	@echo "MSI build not configured or dependency resolution failed (reconfigure with --enable-guest-agent-msi option)"
+	@echo MSI build not configured or dependency resolution failed (reconfigure with --enable-guest-agent-msi option)
 endif

-ifneq ($(EXESUF),)
-.PHONY: qemu-ga
-qemu-ga: qemu-ga$(EXESUF) $(QGA_VSS_PROVIDER) $(QEMU_GA_MSI)
-endif
-
-ivshmem-client$(EXESUF): $(ivshmem-client-obj-y) $(COMMON_LDADDS)
-	$(call LINK, $^)
-ivshmem-server$(EXESUF): $(ivshmem-server-obj-y) $(COMMON_LDADDS)
-	$(call LINK, $^)
-
-module_block.h: $(SRC_PATH)/scripts/modules/module_block.py config-host.mak
-	$(call quiet-command,$(PYTHON) $< $@ \
-	$(addprefix $(SRC_PATH)/,$(patsubst %.mo,%.c,$(block-obj-m))), \
-	"GEN","$@")
-
 clean:
 # avoid old build problems by removing potentially incorrect old files
 	rm -f config.mak op-i386.h opc-i386.h gen-op-i386.h op-arm.h opc-arm.h gen-op-arm.h
 	rm -f qemu-options.def
 	rm -f *.msi
-	find . \( -name '*.so' -o -name '*.dll' -o -name '*.mo' -o -name '*.[oda]' \) -type f -exec rm {} +
+	find . \( -name '*.l[oa]' -o -name '*.so' -o -name '*.dll' -o -name '*.mo' -o -name '*.[oda]' \) -type f -exec rm {} +
 	rm -f $(filter-out %.tlb,$(TOOLS)) $(HELPERS-y) qemu-ga TAGS cscope.* *.pod *~ */*~
 	rm -f fsdev/*.pod
+	rm -rf .libs */.libs
 	rm -f qemu-img-cmds.h
 	rm -f ui/shader/*-vert.h ui/shader/*-frag.h
-	@# May not be present in GENERATED_FILES
+	@# May not be present in GENERATED_HEADERS
 	rm -f trace/generated-tracers-dtrace.dtrace*
 	rm -f trace/generated-tracers-dtrace.h*
-	rm -f $(foreach f,$(GENERATED_FILES),$(f) $(f)-timestamp)
+	rm -f $(foreach f,$(GENERATED_HEADERS),$(f) $(f)-timestamp)
+	rm -f $(foreach f,$(GENERATED_SOURCES),$(f) $(f)-timestamp)
 	rm -rf qapi-generated
 	rm -rf qga/qapi-generated
 	for d in $(ALL_SUBDIRS); do \
 	if test -d $$d; then $(MAKE) -C $$d $@ || exit 1; fi; \
 	rm -f $$d/qemu-options.def; \
        done
-	rm -f $(SUBDIR_DEVICES_MAK) config-all-devices.mak

 VERSION ?= $(shell cat VERSION)

@@ -509,21 +344,17 @@ qemu-%.tar.bz2:
 	$(SRC_PATH)/scripts/make-release "$(SRC_PATH)" "$(patsubst qemu-%.tar.bz2,%,$@)"

 distclean: clean
-	rm -f config-host.mak config-host.h* config-host.ld $(DOCS) qemu-options.texi qemu-img-cmds.texi qemu-monitor.texi qemu-monitor-info.texi
+	rm -f config-host.mak config-host.h* config-host.ld $(DOCS) qemu-options.texi qemu-img-cmds.texi qemu-monitor.texi
 	rm -f config-all-devices.mak config-all-disas.mak config.status
 	rm -f po/*.mo tests/qemu-iotests/common.env
 	rm -f roms/seabios/config.mak roms/vgabios/config.mak
-	rm -f qemu-doc.info qemu-doc.aux qemu-doc.cp qemu-doc.cps
+	rm -f qemu-doc.info qemu-doc.aux qemu-doc.cp qemu-doc.cps qemu-doc.dvi
 	rm -f qemu-doc.fn qemu-doc.fns qemu-doc.info qemu-doc.ky qemu-doc.kys
 	rm -f qemu-doc.log qemu-doc.pdf qemu-doc.pg qemu-doc.toc qemu-doc.tp
-	rm -f qemu-doc.vr qemu-doc.txt
+	rm -f qemu-doc.vr
 	rm -f config.log
 	rm -f linux-headers/asm
-	rm -f docs/qemu-ga-qapi.texi docs/qemu-qmp-qapi.texi docs/version.texi
-	rm -f docs/qemu-qmp-ref.7 docs/qemu-ga-ref.7
-	rm -f docs/qemu-qmp-ref.txt docs/qemu-ga-ref.txt
-	rm -f docs/qemu-qmp-ref.pdf docs/qemu-ga-ref.pdf
-	rm -f docs/qemu-qmp-ref.html docs/qemu-ga-ref.html
+	rm -f qemu-tech.info qemu-tech.aux qemu-tech.cp qemu-tech.dvi qemu-tech.fn qemu-tech.info qemu-tech.ky qemu-tech.log qemu-tech.pdf qemu-tech.pg qemu-tech.toc qemu-tech.tp qemu-tech.vr
 	for d in $(TARGET_DIRS); do \
 	rm -rf $$d || exit 1 ; \
        done
@@ -539,18 +370,18 @@ bepo    cz
 ifdef INSTALL_BLOBS
 BLOBS=bios.bin bios-256k.bin sgabios.bin vgabios.bin vgabios-cirrus.bin \
 vgabios-stdvga.bin vgabios-vmware.bin vgabios-qxl.bin vgabios-virtio.bin \
-acpi-dsdt.aml \
+acpi-dsdt.aml q35-acpi-dsdt.aml \
 ppc_rom.bin openbios-sparc32 openbios-sparc64 openbios-ppc QEMU,tcx.bin QEMU,cgthree.bin \
 pxe-e1000.rom pxe-eepro100.rom pxe-ne2k_pci.rom \
 pxe-pcnet.rom pxe-rtl8139.rom pxe-virtio.rom \
 efi-e1000.rom efi-eepro100.rom efi-ne2k_pci.rom \
 efi-pcnet.rom efi-rtl8139.rom efi-virtio.rom \
-efi-e1000e.rom efi-vmxnet3.rom \
 qemu-icon.bmp qemu_logo_no_text.svg \
 bamboo.dtb petalogix-s3adsp1800.dtb petalogix-ml605.dtb \
-multiboot.bin linuxboot.bin linuxboot_dma.bin kvmvapic.bin \
+multiboot.bin linuxboot.bin kvmvapic.bin \
+s390-zipl.rom \
 s390-ccw.img \
-spapr-rtas.bin slof.bin skiboot.lid \
+spapr-rtas.bin slof.bin \
 palcode-clipper \
 u-boot.e500
 else
@@ -559,26 +390,16 @@ endif

 install-doc: $(DOCS)
 	$(INSTALL_DIR) "$(DESTDIR)$(qemu_docdir)"
-	$(INSTALL_DATA) qemu-doc.html "$(DESTDIR)$(qemu_docdir)"
-	$(INSTALL_DATA) qemu-doc.txt "$(DESTDIR)$(qemu_docdir)"
-	$(INSTALL_DATA) docs/qemu-qmp-ref.html "$(DESTDIR)$(qemu_docdir)"
-	$(INSTALL_DATA) docs/qemu-qmp-ref.txt "$(DESTDIR)$(qemu_docdir)"
+	$(INSTALL_DATA) qemu-doc.html  qemu-tech.html "$(DESTDIR)$(qemu_docdir)"
+	$(INSTALL_DATA) qmp-commands.txt "$(DESTDIR)$(qemu_docdir)"
 ifdef CONFIG_POSIX
 	$(INSTALL_DIR) "$(DESTDIR)$(mandir)/man1"
 	$(INSTALL_DATA) qemu.1 "$(DESTDIR)$(mandir)/man1"
-	$(INSTALL_DIR) "$(DESTDIR)$(mandir)/man7"
-	$(INSTALL_DATA) docs/qemu-qmp-ref.7 "$(DESTDIR)$(mandir)/man7"
 ifneq ($(TOOLS),)
 	$(INSTALL_DATA) qemu-img.1 "$(DESTDIR)$(mandir)/man1"
 	$(INSTALL_DIR) "$(DESTDIR)$(mandir)/man8"
 	$(INSTALL_DATA) qemu-nbd.8 "$(DESTDIR)$(mandir)/man8"
 endif
-ifneq (,$(findstring qemu-ga,$(TOOLS)))
-	$(INSTALL_DATA) qemu-ga.8 "$(DESTDIR)$(mandir)/man8"
-	$(INSTALL_DATA) docs/qemu-ga-ref.html "$(DESTDIR)$(qemu_docdir)"
-	$(INSTALL_DATA) docs/qemu-ga-ref.txt "$(DESTDIR)$(qemu_docdir)"
-	$(INSTALL_DATA) docs/qemu-ga-ref.7 "$(DESTDIR)$(mandir)/man7"
-endif
 endif
 ifdef CONFIG_VIRTFS
 	$(INSTALL_DIR) "$(DESTDIR)$(mandir)/man1"
@@ -596,9 +417,10 @@ endif
 endif


-install: all $(if $(BUILD_DOCS),install-doc) install-datadir install-localstatedir
+install: all $(if $(BUILD_DOCS),install-doc) \
+install-datadir install-localstatedir
 ifneq ($(TOOLS),)
-	$(call install-prog,$(subst qemu-ga,qemu-ga$(EXESUF),$(TOOLS)),$(DESTDIR)$(bindir))
+	$(call install-prog,$(TOOLS),$(DESTDIR)$(bindir))
 endif
 ifneq ($(CONFIG_MODULES),)
 	$(INSTALL_DIR) "$(DESTDIR)$(qemu_moddir)"
@@ -623,7 +445,7 @@ endif
 	set -e; for x in $(KEYMAPS); do \
 		$(INSTALL_DATA) $(SRC_PATH)/pc-bios/keymaps/$$x "$(DESTDIR)$(qemu_datadir)/keymaps"; \
 	done
-	$(INSTALL_DATA) $(BUILD_DIR)/trace-events-all "$(DESTDIR)$(qemu_datadir)/trace-events-all"
+	$(INSTALL_DATA) $(SRC_PATH)/trace-events "$(DESTDIR)$(qemu_datadir)/trace-events"
 	for d in $(TARGET_DIRS); do \
 	$(MAKE) $(SUBDIR_MAKEFLAGS) TARGET_DIR=$$d/ -C $$d $@ || exit 1 ; \
        done
@@ -634,12 +456,12 @@ test speed: all

 .PHONY: ctags
 ctags:
-	rm -f tags
+	rm -f $@
 	find "$(SRC_PATH)" -name '*.[hc]' -exec ctags --append {} +

 .PHONY: TAGS
 TAGS:
-	rm -f TAGS
+	rm -f $@
 	find "$(SRC_PATH)" -name '*.[hc]' -exec etags --append {} +

 cscope:
@@ -652,85 +474,84 @@ ui/shader/%-vert.h: $(SRC_PATH)/ui/shader/%.vert $(SRC_PATH)/scripts/shaderinclu
 	@mkdir -p $(dir $@)
 	$(call quiet-command,\
 		perl $(SRC_PATH)/scripts/shaderinclude.pl $< > $@,\
-		"VERT","$@")
+		"  VERT  $@")

 ui/shader/%-frag.h: $(SRC_PATH)/ui/shader/%.frag $(SRC_PATH)/scripts/shaderinclude.pl
 	@mkdir -p $(dir $@)
 	$(call quiet-command,\
 		perl $(SRC_PATH)/scripts/shaderinclude.pl $< > $@,\
-		"FRAG","$@")
+		"  FRAG  $@")

 ui/console-gl.o: $(SRC_PATH)/ui/console-gl.c \
 	ui/shader/texture-blit-vert.h ui/shader/texture-blit-frag.h

 # documentation
 MAKEINFO=makeinfo
-MAKEINFOFLAGS=--no-split --number-sections -I docs
+MAKEINFOFLAGS=--no-headers --no-split --number-sections
 TEXIFLAG=$(if $(V),,--quiet)
-
-docs/version.texi: $(SRC_PATH)/VERSION
-	$(call quiet-command,echo "@set VERSION $(VERSION)" > $@,"GEN","$@")
+%.dvi: %.texi
+	$(call quiet-command,texi2dvi $(TEXIFLAG) -I . $<,"  GEN   $@")

 %.html: %.texi
-	$(call quiet-command,LC_ALL=C $(MAKEINFO) $(MAKEINFOFLAGS) --no-headers \
-	--html $< -o $@,"GEN","$@")
+	$(call quiet-command,LC_ALL=C $(MAKEINFO) $(MAKEINFOFLAGS) --html $< -o $@, \
+	"  GEN   $@")

 %.info: %.texi
-	$(call quiet-command,$(MAKEINFO) $(MAKEINFOFLAGS) $< -o $@,"GEN","$@")
-
-%.txt: %.texi
-	$(call quiet-command,LC_ALL=C $(MAKEINFO) $(MAKEINFOFLAGS) --no-headers \
-	--plaintext $< -o $@,"GEN","$@")
+	$(call quiet-command,$(MAKEINFO) $< -o $@,"  GEN   $@")

 %.pdf: %.texi
-	$(call quiet-command,texi2pdf $(TEXIFLAG) -I $(SRC_PATH) -I docs $< -o $@,"GEN","$@")
+	$(call quiet-command,texi2pdf $(TEXIFLAG) -I . $<,"  GEN   $@")

-docs/qemu-ga-ref.html docs/qemu-ga-ref.info docs/qemu-ga-ref.txt docs/qemu-ga-ref.pdf docs/qemu-ga-ref.7.pod: docs/version.texi
-docs/qemu-qmp-ref.html docs/qemu-qmp-ref.info docs/qemu-qmp-ref.txt docs/qemu-qmp-ref.pdf docs/qemu-qmp-ref.pod: docs/version.texi
+qemu-options.texi: $(SRC_PATH)/qemu-options.hx
+	$(call quiet-command,sh $(SRC_PATH)/scripts/hxtool -t < $< > $@,"  GEN   $@")

-qemu-options.texi: $(SRC_PATH)/qemu-options.hx $(SRC_PATH)/scripts/hxtool
-	$(call quiet-command,sh $(SRC_PATH)/scripts/hxtool -t < $< > $@,"GEN","$@")
+qemu-monitor.texi: $(SRC_PATH)/hmp-commands.hx
+	$(call quiet-command,sh $(SRC_PATH)/scripts/hxtool -t < $< > $@,"  GEN   $@")

-qemu-monitor.texi: $(SRC_PATH)/hmp-commands.hx $(SRC_PATH)/scripts/hxtool
-	$(call quiet-command,sh $(SRC_PATH)/scripts/hxtool -t < $< > $@,"GEN","$@")
+qmp-commands.txt: $(SRC_PATH)/qmp-commands.hx
+	$(call quiet-command,sh $(SRC_PATH)/scripts/hxtool -q < $< > $@,"  GEN   $@")

-qemu-monitor-info.texi: $(SRC_PATH)/hmp-commands-info.hx $(SRC_PATH)/scripts/hxtool
-	$(call quiet-command,sh $(SRC_PATH)/scripts/hxtool -t < $< > $@,"GEN","$@")
+qemu-img-cmds.texi: $(SRC_PATH)/qemu-img-cmds.hx
+	$(call quiet-command,sh $(SRC_PATH)/scripts/hxtool -t < $< > $@,"  GEN   $@")

-qemu-img-cmds.texi: $(SRC_PATH)/qemu-img-cmds.hx $(SRC_PATH)/scripts/hxtool
-	$(call quiet-command,sh $(SRC_PATH)/scripts/hxtool -t < $< > $@,"GEN","$@")
+qemu.1: qemu-doc.texi qemu-options.texi qemu-monitor.texi
+	$(call quiet-command, \
+	  perl -Ww -- $(SRC_PATH)/scripts/texi2pod.pl $< qemu.pod && \
+	  $(POD2MAN) --section=1 --center=" " --release=" " qemu.pod > $@, \
+	  "  GEN   $@")

-docs/qemu-qmp-qapi.texi docs/qemu-ga-qapi.texi: $(SRC_PATH)/scripts/qapi2texi.py $(qapi-py)
+qemu-img.1: qemu-img.texi qemu-img-cmds.texi
+	$(call quiet-command, \
+	  perl -Ww -- $(SRC_PATH)/scripts/texi2pod.pl $< qemu-img.pod && \
+	  $(POD2MAN) --section=1 --center=" " --release=" " qemu-img.pod > $@, \
+	  "  GEN   $@")

-docs/qemu-qmp-qapi.texi: $(qapi-modules)
-	$(call quiet-command,$(PYTHON) $(SRC_PATH)/scripts/qapi2texi.py $< > $@,"GEN","$@")
-
-docs/qemu-ga-qapi.texi: $(SRC_PATH)/qga/qapi-schema.json
-	$(call quiet-command,$(PYTHON) $(SRC_PATH)/scripts/qapi2texi.py $< > $@,"GEN","$@")
-
-qemu.1: qemu-doc.texi qemu-options.texi qemu-monitor.texi qemu-monitor-info.texi
-qemu.1: qemu-option-trace.texi
-qemu-img.1: qemu-img.texi qemu-option-trace.texi qemu-img-cmds.texi
 fsdev/virtfs-proxy-helper.1: fsdev/virtfs-proxy-helper.texi
-qemu-nbd.8: qemu-nbd.texi qemu-option-trace.texi
-qemu-ga.8: qemu-ga.texi
+	$(call quiet-command, \
+	  perl -Ww -- $(SRC_PATH)/scripts/texi2pod.pl $< fsdev/virtfs-proxy-helper.pod && \
+	  $(POD2MAN) --section=1 --center=" " --release=" " fsdev/virtfs-proxy-helper.pod > $@, \
+	  "  GEN   $@")

-html: qemu-doc.html docs/qemu-qmp-ref.html docs/qemu-ga-ref.html
-info: qemu-doc.info docs/qemu-qmp-ref.info docs/qemu-ga-ref.info
-pdf: qemu-doc.pdf docs/qemu-qmp-ref.pdf docs/qemu-ga-ref.pdf
-txt: qemu-doc.txt docs/qemu-qmp-ref.txt docs/qemu-ga-ref.txt
+qemu-nbd.8: qemu-nbd.texi
+	$(call quiet-command, \
+	  perl -Ww -- $(SRC_PATH)/scripts/texi2pod.pl $< qemu-nbd.pod && \
+	  $(POD2MAN) --section=8 --center=" " --release=" " qemu-nbd.pod > $@, \
+	  "  GEN   $@")

-qemu-doc.html qemu-doc.info qemu-doc.pdf qemu-doc.txt: \
-	qemu-img.texi qemu-nbd.texi qemu-options.texi qemu-option-trace.texi \
-	qemu-monitor.texi qemu-img-cmds.texi qemu-ga.texi \
-	qemu-monitor-info.texi
+kvm_stat.1: scripts/kvm/kvm_stat.texi
+	$(call quiet-command, \
+	  perl -Ww -- $(SRC_PATH)/scripts/texi2pod.pl $< kvm_stat.pod && \
+	  $(POD2MAN) --section=1 --center=" " --release=" " kvm_stat.pod > $@, \
+	  "  GEN   $@")

-docs/qemu-ga-ref.dvi docs/qemu-ga-ref.html docs/qemu-ga-ref.info docs/qemu-ga-ref.pdf docs/qemu-ga-ref.txt docs/qemu-ga-ref.7: \
-docs/qemu-ga-ref.texi docs/qemu-ga-qapi.texi
-
-docs/qemu-qmp-ref.dvi docs/qemu-qmp-ref.html docs/qemu-qmp-ref.info docs/qemu-qmp-ref.pdf docs/qemu-qmp-ref.txt docs/qemu-qmp-ref.7: \
-docs/qemu-qmp-ref.texi docs/qemu-qmp-qapi.texi
+dvi: qemu-doc.dvi qemu-tech.dvi
+html: qemu-doc.html qemu-tech.html
+info: qemu-doc.info qemu-tech.info
+pdf: qemu-doc.pdf qemu-tech.pdf

+qemu-doc.dvi qemu-doc.html qemu-doc.info qemu-doc.pdf: \
+	qemu-img.texi qemu-nbd.texi qemu-options.texi \
+	qemu-monitor.texi qemu-img-cmds.texi

 ifdef CONFIG_WIN32

@@ -780,7 +601,6 @@ endif # SIGNCODE
                $(if $(DLL_PATH),-DDLLDIR="$(DLL_PATH)") \
                -DSRCDIR="$(SRC_PATH)" \
                -DOUTFILE="$(INSTALLER)" \
-                -DDISPLAYVERSION="$(VERSION)" \
                $(SRC_PATH)/qemu.nsi
 	rm -r ${INSTDIR}
 ifdef SIGNCODE
@@ -791,52 +611,9 @@ endif # CONFIG_WIN
 # Add a dependency on the generated files, so that they are always
 # rebuilt before other object files
 ifneq ($(filter-out $(UNCHECKED_GOALS),$(MAKECMDGOALS)),$(if $(MAKECMDGOALS),,fail))
-Makefile: $(GENERATED_FILES)
+Makefile: $(GENERATED_HEADERS)
 endif

-.SECONDARY: $(TRACE_HEADERS) $(TRACE_HEADERS:%=%-timestamp) \
-	$(TRACE_SOURCES) $(TRACE_SOURCES:%=%-timestamp) \
-	$(TRACE_DTRACE) $(TRACE_DTRACE:%=%-timestamp)
-
 # Include automatically generated dependency files
 # Dependencies in Makefile.objs files come from our recursive subdir rules
 -include $(wildcard *.d tests/*.d)
-
-include $(SRC_PATH)/tests/docker/Makefile.include
-
-.PHONY: help
-help:
-	@echo  'Generic targets:'
-	@echo  '  all             - Build all'
-	@echo  '  dir/file.o      - Build specified target only'
-	@echo  '  install         - Install QEMU, documentation and tools'
-	@echo  '  ctags/TAGS      - Generate tags file for editors'
-	@echo  '  cscope          - Generate cscope index'
-	@echo  ''
-	@$(if $(TARGET_DIRS), \
-		echo 'Architecture specific targets:'; \
-		$(foreach t, $(TARGET_DIRS), \
-		printf "  %-30s - Build for %s\\n" $(patsubst %,subdir-%,$(t)) $(t);) \
-		echo '')
-	@echo  'Cleaning targets:'
-	@echo  '  clean           - Remove most generated files but keep the config'
-	@echo  '  distclean       - Remove all generated files'
-	@echo  '  dist            - Build a distributable tarball'
-	@echo  ''
-	@echo  'Test targets:'
-	@echo  '  check           - Run all tests (check-help for details)'
-	@echo  '  docker          - Help about targets running tests inside Docker containers'
-	@echo  ''
-	@echo  'Documentation targets:'
-	@echo  '  html info pdf txt'
-	@echo  '                  - Build documentation in specified format'
-	@echo  ''
-ifdef CONFIG_WIN32
-	@echo  'Windows targets:'
-	@echo  '  installer       - Build NSIS-based installer for QEMU'
-ifdef QEMU_GA_MSI_ENABLED
-	@echo  '  msi             - Build MSI-based installer for qemu-ga'
-endif
-	@echo  ''
-endif
-	@echo  '  make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
@@ -1,37 +1,38 @@
 #######################################################################
 # Common libraries for tools and emulators
-stub-obj-y = stubs/ crypto/
-util-obj-y = util/ qobject/ qapi/
-util-obj-y += qmp-introspect.o qapi-types.o qapi-visit.o qapi-event.o
-
-chardev-obj-y = chardev/
+stub-obj-y = stubs/
+util-obj-y = util/ qobject/ qapi/ qapi-types.o qapi-visit.o qapi-event.o
+util-obj-y += crypto/

 #######################################################################
 # block-obj-y is code used by both qemu system emulation and qemu-img

-block-obj-y += nbd/
-block-obj-y += block.o blockjob.o
+block-obj-y = async.o thread-pool.o
+block-obj-y += nbd.o block.o blockjob.o
+block-obj-y += main-loop.o iohandler.o qemu-timer.o
+block-obj-$(CONFIG_POSIX) += aio-posix.o
+block-obj-$(CONFIG_WIN32) += aio-win32.o
 block-obj-y += block/
 block-obj-y += qemu-io-cmds.o
-block-obj-$(CONFIG_REPLICATION) += replication.o
+
+block-obj-y += qemu-coroutine.o qemu-coroutine-lock.o qemu-coroutine-io.o
+block-obj-y += qemu-coroutine-sleep.o
+block-obj-y += coroutine-$(CONFIG_COROUTINE_BACKEND).o

 block-obj-m = block/

-#######################################################################
-# crypto-obj-y is code used by both qemu system emulation and qemu-img

-crypto-obj-y = crypto/
-crypto-aes-obj-y = crypto/
+######################################################################
+# smartcard

-#######################################################################
-# qom-obj-y is code used by both qemu system emulation and qemu-img
-
-qom-obj-y = qom/
-
-#######################################################################
-# io-obj-y is code used by both qemu system emulation and qemu-img
-
-io-obj-y = io/
+libcacard-y += libcacard/cac.o libcacard/event.o
+libcacard-y += libcacard/vcard.o libcacard/vreader.o
+libcacard-y += libcacard/vcard_emul_nss.o
+libcacard-y += libcacard/vcard_emul_type.o
+libcacard-y += libcacard/card_7816.o
+libcacard-y += libcacard/vcardt.o
+libcacard/vcard_emul_nss.o-cflags := $(NSS_CFLAGS)
+libcacard/vcard_emul_nss.o-libs := $(NSS_LIBS)

 ######################################################################
 # Target independent part of system emulation. The long term path is to
@@ -49,7 +50,9 @@ common-obj-$(CONFIG_POSIX) += os-posix.o
 common-obj-$(CONFIG_LINUX) += fsdev/

 common-obj-y += migration/
-common-obj-y += page_cache.o #aio.o
+common-obj-y += qemu-char.o #aio.o
+common-obj-y += page_cache.o
+common-obj-y += qjson.o

 common-obj-$(CONFIG_SPICE) += spice-qemu-char.o

@@ -57,8 +60,6 @@ common-obj-y += audio/
 common-obj-y += hw/
 common-obj-y += accel.o

-common-obj-y += replay/
-
 common-obj-y += ui/
 common-obj-y += bt-host.o bt-vhci.o
 bt-host.o-cflags := $(BLUEZ_CFLAGS)
@@ -74,19 +75,21 @@ common-obj-y += backends/

 common-obj-$(CONFIG_SECCOMP) += qemu-seccomp.o

+common-obj-$(CONFIG_SMARTCARD_NSS) += $(libcacard-y)
+
 common-obj-$(CONFIG_FDT) += device_tree.o

 ######################################################################
 # qapi

 common-obj-y += qmp-marshal.o
-common-obj-y += qmp-introspect.o
 common-obj-y += qmp.o hmp.o
 endif

 #######################################################################
 # Target-independent parts used in system and user emulation
-common-obj-y += cpus-common.o
+common-obj-y += qemu-log.o
+common-obj-y += tcg-runtime.o
 common-obj-y += hw/
 common-obj-y += qom/
 common-obj-y += disas/
@@ -94,6 +97,7 @@ common-obj-y += disas/
 ######################################################################
 # Resource file for Windows executables
 version-obj-$(CONFIG_WIN32) += $(BUILD_DIR)/version.o
+version-lobj-$(CONFIG_WIN32) += $(BUILD_DIR)/version.lo

 ######################################################################
 # tracing
@@ -107,68 +111,3 @@ target-obj-y += trace/
 # by libqemuutil.a.  These should be moved to a separate .json schema.
 qga-obj-y = qga/
 qga-vss-dll-obj-y = qga/
-
-######################################################################
-# contrib
-ivshmem-client-obj-y = contrib/ivshmem-client/
-ivshmem-server-obj-y = contrib/ivshmem-server/
-libvhost-user-obj-y = contrib/libvhost-user/
-
-######################################################################
-trace-events-subdirs =
-trace-events-subdirs += util
-trace-events-subdirs += crypto
-trace-events-subdirs += io
-trace-events-subdirs += migration
-trace-events-subdirs += block
-trace-events-subdirs += backends
-trace-events-subdirs += hw/block
-trace-events-subdirs += hw/block/dataplane
-trace-events-subdirs += hw/char
-trace-events-subdirs += hw/intc
-trace-events-subdirs += hw/net
-trace-events-subdirs += hw/virtio
-trace-events-subdirs += hw/audio
-trace-events-subdirs += hw/misc
-trace-events-subdirs += hw/usb
-trace-events-subdirs += hw/scsi
-trace-events-subdirs += hw/nvram
-trace-events-subdirs += hw/display
-trace-events-subdirs += hw/input
-trace-events-subdirs += hw/timer
-trace-events-subdirs += hw/dma
-trace-events-subdirs += hw/sparc
-trace-events-subdirs += hw/sd
-trace-events-subdirs += hw/isa
-trace-events-subdirs += hw/mem
-trace-events-subdirs += hw/i386
-trace-events-subdirs += hw/i386/xen
-trace-events-subdirs += hw/9pfs
-trace-events-subdirs += hw/ppc
-trace-events-subdirs += hw/pci
-trace-events-subdirs += hw/s390x
-trace-events-subdirs += hw/vfio
-trace-events-subdirs += hw/acpi
-trace-events-subdirs += hw/arm
-trace-events-subdirs += hw/alpha
-trace-events-subdirs += hw/xen
-trace-events-subdirs += ui
-trace-events-subdirs += audio
-trace-events-subdirs += net
-trace-events-subdirs += target/arm
-trace-events-subdirs += target/i386
-trace-events-subdirs += target/mips
-trace-events-subdirs += target/sparc
-trace-events-subdirs += target/s390x
-trace-events-subdirs += target/ppc
-trace-events-subdirs += qom
-trace-events-subdirs += linux-user
-trace-events-subdirs += qapi
-
-trace-events-files = $(SRC_PATH)/trace-events $(trace-events-subdirs:%=$(SRC_PATH)/%/trace-events)
-
-trace-obj-y = trace-root.o
-trace-obj-y += $(trace-events-subdirs:%=%/trace.o)
-trace-obj-$(CONFIG_TRACE_UST) += trace-ust-all.o
-trace-obj-$(CONFIG_TRACE_DTRACE) += trace-dtrace-root.o
-trace-obj-$(CONFIG_TRACE_DTRACE) += $(trace-events-subdirs:%=%/trace-dtrace.o)
@@ -7,11 +7,11 @@ include config-target.mak
 include config-devices.mak
 include $(SRC_PATH)/rules.mak

-$(call set-vpath, $(SRC_PATH):$(BUILD_DIR))
+$(call set-vpath, $(SRC_PATH))
 ifdef CONFIG_LINUX
 QEMU_CFLAGS += -I../linux-headers
 endif
-QEMU_CFLAGS += -I.. -I$(SRC_PATH)/target/$(TARGET_BASE_ARCH) -DNEED_CPU_H
+QEMU_CFLAGS += -I.. -I$(SRC_PATH)/target-$(TARGET_BASE_ARCH) -DNEED_CPU_H

 QEMU_CFLAGS+=-I$(SRC_PATH)/include

@@ -26,7 +26,7 @@ ifneq (,$(findstring -mwindows,$(libs_softmmu)))
 # Terminate program name with a 'w' because the linker builds a windows executable.
 QEMU_PROGW=qemu-system-$(TARGET_NAME)w$(EXESUF)
 $(QEMU_PROG): $(QEMU_PROGW)
-	$(call quiet-command,$(OBJCOPY) --subsystem console $(QEMU_PROGW) $(QEMU_PROG),"GEN","$(TARGET_DIR)$(QEMU_PROG)")
+	$(call quiet-command,$(OBJCOPY) --subsystem console $(QEMU_PROGW) $(QEMU_PROG),"  GEN   $(TARGET_DIR)$(QEMU_PROG)")
 QEMU_PROG_BUILD = $(QEMU_PROGW)
 else
 QEMU_PROG_BUILD = $(QEMU_PROG)
@@ -48,38 +48,34 @@ else
 TARGET_TYPE=system
 endif

-$(QEMU_PROG).stp-installed: $(BUILD_DIR)/trace-events-all
+$(QEMU_PROG).stp-installed: $(SRC_PATH)/trace-events
 	$(call quiet-command,$(TRACETOOL) \
-		--group=all \
 		--format=stap \
 		--backends=$(TRACE_BACKENDS) \
 		--binary=$(bindir)/$(QEMU_PROG) \
 		--target-name=$(TARGET_NAME) \
 		--target-type=$(TARGET_TYPE) \
-		$< > $@,"GEN","$(TARGET_DIR)$(QEMU_PROG).stp-installed")
+		< $< > $@,"  GEN   $(TARGET_DIR)$(QEMU_PROG).stp-installed")

-$(QEMU_PROG).stp: $(BUILD_DIR)/trace-events-all
+$(QEMU_PROG).stp: $(SRC_PATH)/trace-events
 	$(call quiet-command,$(TRACETOOL) \
-		--group=all \
 		--format=stap \
 		--backends=$(TRACE_BACKENDS) \
 		--binary=$(realpath .)/$(QEMU_PROG) \
 		--target-name=$(TARGET_NAME) \
 		--target-type=$(TARGET_TYPE) \
-		$< > $@,"GEN","$(TARGET_DIR)$(QEMU_PROG).stp")
+		< $< > $@,"  GEN   $(TARGET_DIR)$(QEMU_PROG).stp")

-$(QEMU_PROG)-simpletrace.stp: $(BUILD_DIR)/trace-events-all
+$(QEMU_PROG)-simpletrace.stp: $(SRC_PATH)/trace-events
 	$(call quiet-command,$(TRACETOOL) \
-		--group=all \
 		--format=simpletrace-stap \
 		--backends=$(TRACE_BACKENDS) \
 		--probe-prefix=qemu.$(TARGET_TYPE).$(TARGET_NAME) \
-		$< > $@,"GEN","$(TARGET_DIR)$(QEMU_PROG)-simpletrace.stp")
+		< $< > $@,"  GEN   $(TARGET_DIR)$(QEMU_PROG)-simpletrace.stp")

 else
 stap:
 endif
-.PHONY: stap

 all: $(PROGS) stap

@@ -89,18 +85,13 @@ all: $(PROGS) stap
 #########################################################
 # cpu emulator library
 obj-y = exec.o translate-all.o cpu-exec.o
-obj-y += translate-common.o
-obj-y += cpu-exec-common.o
 obj-y += tcg/tcg.o tcg/tcg-op.o tcg/optimize.o
 obj-$(CONFIG_TCG_INTERPRETER) += tci.o
-obj-y += tcg/tcg-common.o
 obj-$(CONFIG_TCG_INTERPRETER) += disas/tci.o
 obj-y += fpu/softfloat.o
-obj-y += target/$(TARGET_BASE_ARCH)/
+obj-y += target-$(TARGET_BASE_ARCH)/
 obj-y += disas.o
-obj-y += tcg-runtime.o
 obj-$(call notempty,$(TARGET_XML_FILES)) += gdbstub-xml.o
-obj-$(call lnot,$(CONFIG_HAX)) += hax-stub.o
 obj-$(call lnot,$(CONFIG_KVM)) += kvm-stub.o

 obj-$(CONFIG_LIBDECNUMBER) += libdecnumber/decContext.o
@@ -114,12 +105,10 @@ obj-$(CONFIG_LIBDECNUMBER) += libdecnumber/dpd/decimal128.o

 ifdef CONFIG_LINUX_USER

-QEMU_CFLAGS+=-I$(SRC_PATH)/linux-user/$(TARGET_ABI_DIR) \
-             -I$(SRC_PATH)/linux-user/host/$(ARCH) \
-             -I$(SRC_PATH)/linux-user
+QEMU_CFLAGS+=-I$(SRC_PATH)/linux-user/$(TARGET_ABI_DIR) -I$(SRC_PATH)/linux-user

 obj-y += linux-user/
-obj-y += gdbstub.o thunk.o user-exec.o user-exec-stub.o
+obj-y += gdbstub.o thunk.o user-exec.o

 endif #CONFIG_LINUX_USER

@@ -132,7 +121,7 @@ QEMU_CFLAGS+=-I$(SRC_PATH)/bsd-user -I$(SRC_PATH)/bsd-user/$(TARGET_ABI_DIR) \
 			 -I$(SRC_PATH)/bsd-user/$(HOST_VARIANT_DIR)

 obj-y += bsd-user/
-obj-y += gdbstub.o user-exec.o user-exec-stub.o
+obj-y += gdbstub.o user-exec.o

 endif #CONFIG_BSD_USER

@@ -162,7 +151,7 @@ else
 obj-y += hw/$(TARGET_BASE_ARCH)/
 endif

-GENERATED_FILES += hmp-commands.h hmp-commands-info.h
+GENERATED_HEADERS += hmp-commands.h qmp-commands-old.h

 endif # CONFIG_SOFTMMU

@@ -175,55 +164,42 @@ all-obj-y := $(obj-y)
 target-obj-y :=
 block-obj-y :=
 common-obj-y :=
-chardev-obj-y :=
 include $(SRC_PATH)/Makefile.objs
 dummy := $(call unnest-vars,,target-obj-y)
 target-obj-y-save := $(target-obj-y)
 dummy := $(call unnest-vars,.., \
               block-obj-y \
               block-obj-m \
-               chardev-obj-y \
-               crypto-obj-y \
-               crypto-aes-obj-y \
-               qom-obj-y \
-               io-obj-y \
               common-obj-y \
-               common-obj-m \
-               trace-obj-y)
+               common-obj-m)
 target-obj-y := $(target-obj-y-save)
 all-obj-y += $(common-obj-y)
 all-obj-y += $(target-obj-y)
-all-obj-y += $(qom-obj-y)
-all-obj-$(CONFIG_SOFTMMU) += $(block-obj-y) $(chardev-obj-y)
-all-obj-$(CONFIG_USER_ONLY) += $(crypto-aes-obj-y)
-all-obj-$(CONFIG_SOFTMMU) += $(crypto-obj-y)
-all-obj-$(CONFIG_SOFTMMU) += $(io-obj-y)
+all-obj-$(CONFIG_SOFTMMU) += $(block-obj-y)

 $(QEMU_PROG_BUILD): config-devices.mak

-COMMON_LDADDS = $(trace-obj-y) ../libqemuutil.a ../libqemustub.a
-
 # build either PROG or PROGW
-$(QEMU_PROG_BUILD): $(all-obj-y) $(COMMON_LDADDS)
+$(QEMU_PROG_BUILD): $(all-obj-y) ../libqemuutil.a ../libqemustub.a
 	$(call LINK, $(filter-out %.mak, $^))
 ifdef CONFIG_DARWIN
-	$(call quiet-command,Rez -append $(SRC_PATH)/pc-bios/qemu.rsrc -o $@,"REZ","$(TARGET_DIR)$@")
-	$(call quiet-command,SetFile -a C $@,"SETFILE","$(TARGET_DIR)$@")
+	$(call quiet-command,Rez -append $(SRC_PATH)/pc-bios/qemu.rsrc -o $@,"  REZ   $(TARGET_DIR)$@")
+	$(call quiet-command,SetFile -a C $@,"  SETFILE $(TARGET_DIR)$@")
 endif

 gdbstub-xml.c: $(TARGET_XML_FILES) $(SRC_PATH)/scripts/feature_to_c.sh
-	$(call quiet-command,rm -f $@ && $(SHELL) $(SRC_PATH)/scripts/feature_to_c.sh $@ $(TARGET_XML_FILES),"GEN","$(TARGET_DIR)$@")
+	$(call quiet-command,rm -f $@ && $(SHELL) $(SRC_PATH)/scripts/feature_to_c.sh $@ $(TARGET_XML_FILES),"  GEN   $(TARGET_DIR)$@")

-hmp-commands.h: $(SRC_PATH)/hmp-commands.hx $(SRC_PATH)/scripts/hxtool
-	$(call quiet-command,sh $(SRC_PATH)/scripts/hxtool -h < $< > $@,"GEN","$(TARGET_DIR)$@")
+hmp-commands.h: $(SRC_PATH)/hmp-commands.hx
+	$(call quiet-command,sh $(SRC_PATH)/scripts/hxtool -h < $< > $@,"  GEN   $(TARGET_DIR)$@")

-hmp-commands-info.h: $(SRC_PATH)/hmp-commands-info.hx $(SRC_PATH)/scripts/hxtool
-	$(call quiet-command,sh $(SRC_PATH)/scripts/hxtool -h < $< > $@,"GEN","$(TARGET_DIR)$@")
+qmp-commands-old.h: $(SRC_PATH)/qmp-commands.hx
+	$(call quiet-command,sh $(SRC_PATH)/scripts/hxtool -h < $< > $@,"  GEN   $(TARGET_DIR)$@")

-clean: clean-target
+clean:
 	rm -f *.a *~ $(PROGS)
 	rm -f $(shell find . -name '*.[od]')
-	rm -f hmp-commands.h gdbstub-xml.c
+	rm -f hmp-commands.h qmp-commands-old.h gdbstub-xml.c
 ifdef CONFIG_TRACE_SYSTEMTAP
 	rm -f *.stp
 endif
@@ -238,5 +214,5 @@ ifdef CONFIG_TRACE_SYSTEMTAP
 	$(INSTALL_DATA) $(QEMU_PROG)-simpletrace.stp "$(DESTDIR)$(qemu_datadir)/../systemtap/tapset/$(QEMU_PROG)-simpletrace.stp"
 endif

-GENERATED_FILES += config-target.h
-Makefile: $(GENERATED_FILES)
+GENERATED_HEADERS += config-target.h
+Makefile: $(GENERATED_HEADERS)
@@ -1,106 +1,3 @@
-         QEMU README
-         ===========
+Read the documentation in qemu-doc.html or on http://wiki.qemu-project.org

-QEMU is a generic and open source machine & userspace emulator and
-virtualizer.
-
-QEMU is capable of emulating a complete machine in software without any
-need for hardware virtualization support. By using dynamic translation,
-it achieves very good performance. QEMU can also integrate with the Xen
-and KVM hypervisors to provide emulated hardware while allowing the
-hypervisor to manage the CPU. With hypervisor support, QEMU can achieve
-near native performance for CPUs. When QEMU emulates CPUs directly it is
-capable of running operating systems made for one machine (e.g. an ARMv7
-board) on a different machine (e.g. an x86_64 PC board).
-
-QEMU is also capable of providing userspace API virtualization for Linux
-and BSD kernel interfaces. This allows binaries compiled against one
-architecture ABI (e.g. the Linux PPC64 ABI) to be run on a host using a
-different architecture ABI (e.g. the Linux x86_64 ABI). This does not
-involve any hardware emulation, simply CPU and syscall emulation.
-
-QEMU aims to fit into a variety of use cases. It can be invoked directly
-by users wishing to have full control over its behaviour and settings.
-It also aims to facilitate integration into higher level management
-layers, by providing a stable command line interface and monitor API.
-It is commonly invoked indirectly via the libvirt library when using
-open source applications such as oVirt, OpenStack and virt-manager.
-
-QEMU as a whole is released under the GNU General Public License,
-version 2. For full licensing details, consult the LICENSE file.
-
-
-Building
-========
-
-QEMU is multi-platform software intended to be buildable on all modern
-Linux platforms, OS-X, Win32 (via the Mingw64 toolchain) and a variety
-of other UNIX targets. The simple steps to build QEMU are:
-
-  mkdir build
-  cd build
-  ../configure
-  make
-
-Additional information can also be found online via the QEMU website:
-
-  http://qemu-project.org/Hosts/Linux
-  http://qemu-project.org/Hosts/Mac
-  http://qemu-project.org/Hosts/W32
-
-
-Submitting patches
-==================
-
-The QEMU source code is maintained under the GIT version control system.
-
-   git clone git://git.qemu-project.org/qemu.git
-
-When submitting patches, the preferred approach is to use 'git
-format-patch' and/or 'git send-email' to format & send the mail to the
-qemu-devel@nongnu.org mailing list. All patches submitted must contain
-a 'Signed-off-by' line from the author. Patches should follow the
-guidelines set out in the HACKING and CODING_STYLE files.
-
-Additional information on submitting patches can be found online via
-the QEMU website
-
-  http://qemu-project.org/Contribute/SubmitAPatch
-  http://qemu-project.org/Contribute/TrivialPatches
-
-
-Bug reporting
-=============
-
-The QEMU project uses Launchpad as its primary upstream bug tracker. Bugs
-found when running code built from QEMU git or upstream released sources
-should be reported via:
-
-  https://bugs.launchpad.net/qemu/
-
-If using QEMU via an operating system vendor pre-built binary package, it
-is preferable to report bugs to the vendor's own bug tracker first. If
-the bug is also known to affect latest upstream code, it can also be
-reported via launchpad.
-
-For additional information on bug reporting consult:
-
-  http://qemu-project.org/Contribute/ReportABug
-
-
-Contact
-=======
-
-The QEMU community can be contacted in a number of ways, with the two
-main methods being email and IRC
-
- - qemu-devel@nongnu.org
-   http://lists.nongnu.org/mailman/listinfo/qemu-devel
- - #qemu on irc.oftc.net
-
-Information on additional methods of contacting the community can be
-found online via the QEMU website:
-
-  http://qemu-project.org/Contribute/StartHere
-
-- End
+- QEMU team
@@ -1 +1 @@
-2.9.1
+2.4.1
@@ -23,7 +23,6 @@
 * THE SOFTWARE.
 */

-#include "qemu/osdep.h"
 #include "sysemu/accel.h"
 #include "hw/boards.h"
 #include "qemu-common.h"
@@ -33,6 +32,7 @@
 #include "sysemu/qtest.h"
 #include "hw/xen/xen.h"
 #include "qom/object.h"
+#include "hw/boards.h"

 int tcg_tb_size;
 static bool tcg_allowed = true;
@@ -76,7 +76,7 @@ static int accel_init_machine(AccelClass *acc, MachineState *ms)
    return ret;
 }

-void configure_accelerator(MachineState *ms)
+int configure_accelerator(MachineState *ms)
 {
    const char *p;
    char buf[10];
@@ -127,6 +127,8 @@ void configure_accelerator(MachineState *ms)
    if (init_failed) {
        fprintf(stderr, "Back to %s accelerator.\n", acc->name);
    }
+
+    return !accel_initialised;
 }


@@ -0,0 +1,299 @@
+/*
+ * QEMU aio implementation
+ *
+ * Copyright IBM, Corp. 2008
+ *
+ * Authors:
+ *  Anthony Liguori   <aliguori@us.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2.  See
+ * the COPYING file in the top-level directory.
+ *
+ * Contributions after 2012-01-13 are licensed under the terms of the
+ * GNU GPL, version 2 or (at your option) any later version.
+ */
+
+#include "qemu-common.h"
+#include "block/block.h"
+#include "qemu/queue.h"
+#include "qemu/sockets.h"
+
+struct AioHandler
+{
+    GPollFD pfd;
+    IOHandler *io_read;
+    IOHandler *io_write;
+    int deleted;
+    void *opaque;
+    QLIST_ENTRY(AioHandler) node;
+};
+
+static AioHandler *find_aio_handler(AioContext *ctx, int fd)
+{
+    AioHandler *node;
+
+    QLIST_FOREACH(node, &ctx->aio_handlers, node) {
+        if (node->pfd.fd == fd)
+            if (!node->deleted)
+                return node;
+    }
+
+    return NULL;
+}
+
+void aio_set_fd_handler(AioContext *ctx,
+                        int fd,
+                        IOHandler *io_read,
+                        IOHandler *io_write,
+                        void *opaque)
+{
+    AioHandler *node;
+
+    node = find_aio_handler(ctx, fd);
+
+    /* Are we deleting the fd handler? */
+    if (!io_read && !io_write) {
+        if (node) {
+            g_source_remove_poll(&ctx->source, &node->pfd);
+
+            /* If the lock is held, just mark the node as deleted */
+            if (ctx->walking_handlers) {
+                node->deleted = 1;
+                node->pfd.revents = 0;
+            } else {
+                /* Otherwise, delete it for real.  We can't just mark it as
+                 * deleted because deleted nodes are only cleaned up after
+                 * releasing the walking_handlers lock.
+                 */
+                QLIST_REMOVE(node, node);
+                g_free(node);
+            }
+        }
+    } else {
+        if (node == NULL) {
+            /* Alloc and insert if it's not already there */
+            node = g_new0(AioHandler, 1);
+            node->pfd.fd = fd;
+            QLIST_INSERT_HEAD(&ctx->aio_handlers, node, node);
+
+            g_source_add_poll(&ctx->source, &node->pfd);
+        }
+        /* Update handler with latest information */
+        node->io_read = io_read;
+        node->io_write = io_write;
+        node->opaque = opaque;
+
+        node->pfd.events = (io_read ? G_IO_IN | G_IO_HUP | G_IO_ERR : 0);
+        node->pfd.events |= (io_write ? G_IO_OUT | G_IO_ERR : 0);
+    }
+
+    aio_notify(ctx);
+}
+
+void aio_set_event_notifier(AioContext *ctx,
+                            EventNotifier *notifier,
+                            EventNotifierHandler *io_read)
+{
+    aio_set_fd_handler(ctx, event_notifier_get_fd(notifier),
+                       (IOHandler *)io_read, NULL, notifier);
+}
+
+bool aio_prepare(AioContext *ctx)
+{
+    return false;
+}
+
+bool aio_pending(AioContext *ctx)
+{
+    AioHandler *node;
+
+    QLIST_FOREACH(node, &ctx->aio_handlers, node) {
+        int revents;
+
+        revents = node->pfd.revents & node->pfd.events;
+        if (revents & (G_IO_IN | G_IO_HUP | G_IO_ERR) && node->io_read) {
+            return true;
+        }
+        if (revents & (G_IO_OUT | G_IO_ERR) && node->io_write) {
+            return true;
+        }
+    }
+
+    return false;
+}
+
+bool aio_dispatch(AioContext *ctx)
+{
+    AioHandler *node;
+    bool progress = false;
+
+    /*
+     * If there are callbacks left that have been queued, we need to call them.
+     * Do not call select in this case, because it is possible that the caller
+     * does not need a complete flush (as is the case for aio_poll loops).
+     */
+    if (aio_bh_poll(ctx)) {
+        progress = true;
+    }
+
+    /*
+     * We have to walk very carefully in case aio_set_fd_handler is
+     * called while we're walking.
+     */
+    node = QLIST_FIRST(&ctx->aio_handlers);
+    while (node) {
+        AioHandler *tmp;
+        int revents;
+
+        ctx->walking_handlers++;
+
+        revents = node->pfd.revents & node->pfd.events;
+        node->pfd.revents = 0;
+
+        if (!node->deleted &&
+            (revents & (G_IO_IN | G_IO_HUP | G_IO_ERR)) &&
+            node->io_read) {
+            node->io_read(node->opaque);
+
+            /* aio_notify() does not count as progress */
+            if (node->opaque != &ctx->notifier) {
+                progress = true;
+            }
+        }
+        if (!node->deleted &&
+            (revents & (G_IO_OUT | G_IO_ERR)) &&
+            node->io_write) {
+            node->io_write(node->opaque);
+            progress = true;
+        }
+
+        tmp = node;
+        node = QLIST_NEXT(node, node);
+
+        ctx->walking_handlers--;
+
+        if (!ctx->walking_handlers && tmp->deleted) {
+            QLIST_REMOVE(tmp, node);
+            g_free(tmp);
+        }
+    }
+
+    /* Run our timers */
+    progress |= timerlistgroup_run_timers(&ctx->tlg);
+
+    return progress;
+}
+
+/* These thread-local variables are used only in a small part of aio_poll
+ * around the call to the poll() system call.  In particular they are not
+ * used while aio_poll is performing callbacks, which makes it much easier
+ * to think about reentrancy!
+ *
+ * Stack-allocated arrays would be perfect but they have size limitations;
+ * heap allocation is expensive enough that we want to reuse arrays across
+ * calls to aio_poll().  And because poll() has to be called without holding
+ * any lock, the arrays cannot be stored in AioContext.  Thread-local data
+ * has none of the disadvantages of these three options.
+ */
+static __thread GPollFD *pollfds;
+static __thread AioHandler **nodes;
+static __thread unsigned npfd, nalloc;
+static __thread Notifier pollfds_cleanup_notifier;
+
+static void pollfds_cleanup(Notifier *n, void *unused)
+{
+    g_assert(npfd == 0);
+    g_free(pollfds);
+    g_free(nodes);
+    nalloc = 0;
+}
+
+static void add_pollfd(AioHandler *node)
+{
+    if (npfd == nalloc) {
+        if (nalloc == 0) {
+            pollfds_cleanup_notifier.notify = pollfds_cleanup;
+            qemu_thread_atexit_add(&pollfds_cleanup_notifier);
+            nalloc = 8;
+        } else {
+            g_assert(nalloc <= INT_MAX);
+            nalloc *= 2;
+        }
+        pollfds = g_renew(GPollFD, pollfds, nalloc);
+        nodes = g_renew(AioHandler *, nodes, nalloc);
+    }
+    nodes[npfd] = node;
+    pollfds[npfd] = (GPollFD) {
+        .fd = node->pfd.fd,
+        .events = node->pfd.events,
+    };
+    npfd++;
+}
+
+bool aio_poll(AioContext *ctx, bool blocking)
+{
+    AioHandler *node;
+    int i, ret;
+    bool progress;
+    int64_t timeout;
+
+    aio_context_acquire(ctx);
+    progress = false;
+
+    /* aio_notify can avoid the expensive event_notifier_set if
+     * everything (file descriptors, bottom halves, timers) will
+     * be re-evaluated before the next blocking poll().  This is
+     * already true when aio_poll is called with blocking == false;
+     * if blocking == true, it is only true after poll() returns,
+     * so disable the optimization now.
+     */
+    if (blocking) {
+        atomic_add(&ctx->notify_me, 2);
+    }
+
+    ctx->walking_handlers++;
+
+    assert(npfd == 0);
+
+    /* fill pollfds */
+    QLIST_FOREACH(node, &ctx->aio_handlers, node) {
+        if (!node->deleted && node->pfd.events) {
+            add_pollfd(node);
+        }
+    }
+
+    timeout = blocking ? aio_compute_timeout(ctx) : 0;
+
+    /* wait until next event */
+    if (timeout) {
+        aio_context_release(ctx);
+    }
+    ret = qemu_poll_ns((GPollFD *)pollfds, npfd, timeout);
+    if (blocking) {
+        atomic_sub(&ctx->notify_me, 2);
+    }
+    if (timeout) {
+        aio_context_acquire(ctx);
+    }
+
+    aio_notify_accept(ctx);
+
+    /* if we have any readable fds, dispatch event */
+    if (ret > 0) {
+        for (i = 0; i < npfd; i++) {
+            nodes[i]->pfd.revents = pollfds[i].revents;
+        }
+    }
+
+    npfd = 0;
+    ctx->walking_handlers--;
+
+    /* Run dispatch even if there were no readable fds to run timers */
+    if (aio_dispatch(ctx)) {
+        progress = true;
+    }
+
+    aio_context_release(ctx);
+
+    return progress;
+}
@@ -15,13 +15,10 @@
 * GNU GPL, version 2 or (at your option) any later version.
 */

-#include "qemu/osdep.h"
 #include "qemu-common.h"
 #include "block/block.h"
 #include "qemu/queue.h"
 #include "qemu/sockets.h"
-#include "qapi/error.h"
-#include "qemu/rcu_queue.h"

 struct AioHandler {
    EventNotifier *e;
@@ -31,22 +28,18 @@ struct AioHandler {
    GPollFD pfd;
    int deleted;
    void *opaque;
-    bool is_external;
    QLIST_ENTRY(AioHandler) node;
 };

 void aio_set_fd_handler(AioContext *ctx,
                        int fd,
-                        bool is_external,
                        IOHandler *io_read,
                        IOHandler *io_write,
-                        AioPollFn *io_poll,
                        void *opaque)
 {
    /* fd is a SOCKET in our case */
    AioHandler *node;

-    qemu_lockcnt_lock(&ctx->list_lock);
    QLIST_FOREACH(node, &ctx->aio_handlers, node) {
        if (node->pfd.fd == fd && !node->deleted) {
            break;
@@ -56,14 +49,14 @@ void aio_set_fd_handler(AioContext *ctx,
    /* Are we deleting the fd handler? */
    if (!io_read && !io_write) {
        if (node) {
-            /* If aio_poll is in progress, just mark the node as deleted */
-            if (qemu_lockcnt_count(&ctx->list_lock)) {
+            /* If the lock is held, just mark the node as deleted */
+            if (ctx->walking_handlers) {
                node->deleted = 1;
                node->pfd.revents = 0;
            } else {
                /* Otherwise, delete it for real.  We can't just mark it as
                 * deleted because deleted nodes are only cleaned up after
-                 * releasing the list_lock.
+                 * releasing the walking_handlers lock.
                 */
                QLIST_REMOVE(node, node);
                g_free(node);
@@ -76,7 +69,7 @@ void aio_set_fd_handler(AioContext *ctx,
            /* Alloc and insert if it's not already there */
            node = g_new0(AioHandler, 1);
            node->pfd.fd = fd;
-            QLIST_INSERT_HEAD_RCU(&ctx->aio_handlers, node, node);
+            QLIST_INSERT_HEAD(&ctx->aio_handlers, node, node);
        }

        node->pfd.events = 0;
@@ -93,7 +86,6 @@ void aio_set_fd_handler(AioContext *ctx,
        node->opaque = opaque;
        node->io_read = io_read;
        node->io_write = io_write;
-        node->is_external = is_external;

        event = event_notifier_get_handle(&ctx->notifier);
        WSAEventSelect(node->pfd.fd, event,
@@ -101,26 +93,15 @@ void aio_set_fd_handler(AioContext *ctx,
                       FD_CONNECT | FD_WRITE | FD_OOB);
    }

-    qemu_lockcnt_unlock(&ctx->list_lock);
    aio_notify(ctx);
 }

-void aio_set_fd_poll(AioContext *ctx, int fd,
-                     IOHandler *io_poll_begin,
-                     IOHandler *io_poll_end)
-{
-    /* Not implemented */
-}
-
 void aio_set_event_notifier(AioContext *ctx,
                            EventNotifier *e,
-                            bool is_external,
-                            EventNotifierHandler *io_notify,
-                            AioPollFn *io_poll)
+                            EventNotifierHandler *io_notify)
 {
    AioHandler *node;

-    qemu_lockcnt_lock(&ctx->list_lock);
    QLIST_FOREACH(node, &ctx->aio_handlers, node) {
        if (node->e == e && !node->deleted) {
            break;
@@ -132,14 +113,14 @@ void aio_set_event_notifier(AioContext *ctx,
        if (node) {
            g_source_remove_poll(&ctx->source, &node->pfd);

-            /* aio_poll is in progress, just mark the node as deleted */
-            if (qemu_lockcnt_count(&ctx->list_lock)) {
+            /* If the lock is held, just mark the node as deleted */
+            if (ctx->walking_handlers) {
                node->deleted = 1;
                node->pfd.revents = 0;
            } else {
                /* Otherwise, delete it for real.  We can't just mark it as
                 * deleted because deleted nodes are only cleaned up after
-                 * releasing the list_lock.
+                 * releasing the walking_handlers lock.
                 */
                QLIST_REMOVE(node, node);
                g_free(node);
@@ -152,8 +133,7 @@ void aio_set_event_notifier(AioContext *ctx,
            node->e = e;
            node->pfd.fd = (uintptr_t)event_notifier_get_handle(e);
            node->pfd.events = G_IO_IN;
-            node->is_external = is_external;
-            QLIST_INSERT_HEAD_RCU(&ctx->aio_handlers, node, node);
+            QLIST_INSERT_HEAD(&ctx->aio_handlers, node, node);

            g_source_add_poll(&ctx->source, &node->pfd);
        }
@@ -161,18 +141,9 @@ void aio_set_event_notifier(AioContext *ctx,
        node->io_notify = io_notify;
    }

-    qemu_lockcnt_unlock(&ctx->list_lock);
    aio_notify(ctx);
 }

-void aio_set_event_notifier_poll(AioContext *ctx,
-                                 EventNotifier *notifier,
-                                 EventNotifierHandler *io_poll_begin,
-                                 EventNotifierHandler *io_poll_end)
-{
-    /* Not implemented */
-}
-
 bool aio_prepare(AioContext *ctx)
 {
    static struct timeval tv0;
@@ -180,16 +151,10 @@ bool aio_prepare(AioContext *ctx)
    bool have_select_revents = false;
    fd_set rfds, wfds;

-    /*
-     * We have to walk very carefully in case aio_set_fd_handler is
-     * called while we're walking.
-     */
-    qemu_lockcnt_inc(&ctx->list_lock);
-
    /* fill fd sets */
    FD_ZERO(&rfds);
    FD_ZERO(&wfds);
-    QLIST_FOREACH_RCU(node, &ctx->aio_handlers, node) {
+    QLIST_FOREACH(node, &ctx->aio_handlers, node) {
        if (node->io_read) {
            FD_SET ((SOCKET)node->pfd.fd, &rfds);
        }
@@ -199,7 +164,7 @@ bool aio_prepare(AioContext *ctx)
    }

    if (select(0, &rfds, &wfds, NULL, &tv0) > 0) {
-        QLIST_FOREACH_RCU(node, &ctx->aio_handlers, node) {
+        QLIST_FOREACH(node, &ctx->aio_handlers, node) {
            node->pfd.revents = 0;
            if (FD_ISSET(node->pfd.fd, &rfds)) {
                node->pfd.revents |= G_IO_IN;
@@ -213,53 +178,45 @@ bool aio_prepare(AioContext *ctx)
        }
    }

-    qemu_lockcnt_dec(&ctx->list_lock);
    return have_select_revents;
 }

 bool aio_pending(AioContext *ctx)
 {
    AioHandler *node;
-    bool result = false;

-    /*
-     * We have to walk very carefully in case aio_set_fd_handler is
-     * called while we're walking.
-     */
-    qemu_lockcnt_inc(&ctx->list_lock);
-    QLIST_FOREACH_RCU(node, &ctx->aio_handlers, node) {
+    QLIST_FOREACH(node, &ctx->aio_handlers, node) {
        if (node->pfd.revents && node->io_notify) {
-            result = true;
-            break;
+            return true;
        }

        if ((node->pfd.revents & G_IO_IN) && node->io_read) {
-            result = true;
-            break;
+            return true;
        }
        if ((node->pfd.revents & G_IO_OUT) && node->io_write) {
-            result = true;
-            break;
+            return true;
        }
    }

-    qemu_lockcnt_dec(&ctx->list_lock);
-    return result;
+    return false;
 }

 static bool aio_dispatch_handlers(AioContext *ctx, HANDLE event)
 {
    AioHandler *node;
    bool progress = false;
-    AioHandler *tmp;

    /*
     * We have to walk very carefully in case aio_set_fd_handler is
     * called while we're walking.
     */
-    QLIST_FOREACH_SAFE_RCU(node, &ctx->aio_handlers, node, tmp) {
+    node = QLIST_FIRST(&ctx->aio_handlers);
+    while (node) {
+        AioHandler *tmp;
        int revents = node->pfd.revents;

+        ctx->walking_handlers++;
+
        if (!node->deleted &&
            (revents || event_notifier_get_handle(node->e) == event) &&
            node->io_notify) {
@@ -294,25 +251,28 @@ static bool aio_dispatch_handlers(AioContext *ctx, HANDLE event)
            }
        }

-        if (node->deleted) {
-            if (qemu_lockcnt_dec_if_lock(&ctx->list_lock)) {
-                QLIST_REMOVE(node, node);
-                g_free(node);
-                qemu_lockcnt_inc_and_unlock(&ctx->list_lock);
-            }
+        tmp = node;
+        node = QLIST_NEXT(node, node);
+
+        ctx->walking_handlers--;
+
+        if (!ctx->walking_handlers && tmp->deleted) {
+            QLIST_REMOVE(tmp, node);
+            g_free(tmp);
        }
    }

    return progress;
 }

-void aio_dispatch(AioContext *ctx)
+bool aio_dispatch(AioContext *ctx)
 {
-    qemu_lockcnt_inc(&ctx->list_lock);
-    aio_bh_poll(ctx);
-    aio_dispatch_handlers(ctx, INVALID_HANDLE_VALUE);
-    qemu_lockcnt_dec(&ctx->list_lock);
-    timerlistgroup_run_timers(&ctx->tlg);
+    bool progress;
+
+    progress = aio_bh_poll(ctx);
+    progress |= aio_dispatch_handlers(ctx, INVALID_HANDLE_VALUE);
+    progress |= timerlistgroup_run_timers(&ctx->tlg);
+    return progress;
 }

 bool aio_poll(AioContext *ctx, bool blocking)
@@ -323,6 +283,7 @@ bool aio_poll(AioContext *ctx, bool blocking)
    int count;
    int timeout;

+    aio_context_acquire(ctx);
    progress = false;

    /* aio_notify can avoid the expensive event_notifier_set if
@@ -336,18 +297,19 @@ bool aio_poll(AioContext *ctx, bool blocking)
        atomic_add(&ctx->notify_me, 2);
    }

-    qemu_lockcnt_inc(&ctx->list_lock);
    have_select_revents = aio_prepare(ctx);

+    ctx->walking_handlers++;
+
    /* fill fd sets */
    count = 0;
-    QLIST_FOREACH_RCU(node, &ctx->aio_handlers, node) {
-        if (!node->deleted && node->io_notify
-            && aio_node_check(ctx, node->is_external)) {
+    QLIST_FOREACH(node, &ctx->aio_handlers, node) {
+        if (!node->deleted && node->io_notify) {
            events[count++] = event_notifier_get_handle(node->e);
        }
    }

+    ctx->walking_handlers--;
    first = true;

    /* ctx->notifier is always registered.  */
@@ -363,11 +325,17 @@ bool aio_poll(AioContext *ctx, bool blocking)

        timeout = blocking && !have_select_revents
            ? qemu_timeout_ns_to_ms(aio_compute_timeout(ctx)) : 0;
+        if (timeout) {
+            aio_context_release(ctx);
+        }
        ret = WaitForMultipleObjects(count, events, FALSE, timeout);
        if (blocking) {
            assert(first);
            atomic_sub(&ctx->notify_me, 2);
        }
+        if (timeout) {
+            aio_context_acquire(ctx);
+        }

        if (first) {
            aio_notify_accept(ctx);
@@ -390,18 +358,8 @@ bool aio_poll(AioContext *ctx, bool blocking)
        progress |= aio_dispatch_handlers(ctx, event);
    } while (count > 0);

-    qemu_lockcnt_dec(&ctx->list_lock);
-
    progress |= timerlistgroup_run_timers(&ctx->tlg);
+
+    aio_context_release(ctx);
    return progress;
 }
-
-void aio_context_setup(AioContext *ctx)
-{
-}
-
-void aio_context_set_poll_params(AioContext *ctx, int64_t max_ns,
-                                 int64_t grow, int64_t shrink, Error **errp)
-{
-    error_setg(errp, "AioContext polling is not implemented on Windows");
-}
@@ -21,18 +21,16 @@
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
-#include "qemu/osdep.h"
-#include "qemu-common.h"
-#include "cpu.h"
+#include <stdint.h>
 #include "sysemu/sysemu.h"
 #include "sysemu/arch_init.h"
 #include "hw/pci/pci.h"
 #include "hw/audio/audio.h"
+#include "hw/i386/smbios.h"
 #include "qemu/config-file.h"
 #include "qemu/error-report.h"
 #include "qmp-commands.h"
 #include "hw/acpi/acpi.h"
-#include "qemu/help_option.h"

 #ifdef TARGET_SPARC
 int graphic_width = 1024;
@@ -63,8 +61,6 @@ int graphic_depth = 32;
 #define QEMU_ARCH QEMU_ARCH_MIPS
 #elif defined(TARGET_MOXIE)
 #define QEMU_ARCH QEMU_ARCH_MOXIE
-#elif defined(TARGET_NIOS2)
-#define QEMU_ARCH QEMU_ARCH_NIOS2
 #elif defined(TARGET_OPENRISC)
 #define QEMU_ARCH QEMU_ARCH_OPENRISC
 #elif defined(TARGET_PPC)
@@ -85,6 +81,33 @@ int graphic_depth = 32;

 const uint32_t arch_type = QEMU_ARCH;

+static struct defconfig_file {
+    const char *filename;
+    /* Indicates it is an user config file (disabled by -no-user-config) */
+    bool userconfig;
+} default_config_files[] = {
+    { CONFIG_QEMU_CONFDIR "/qemu.conf",                   true },
+    { NULL }, /* end of list */
+};
+
+int qemu_read_default_config_files(bool userconfig)
+{
+    int ret;
+    struct defconfig_file *f;
+
+    for (f = default_config_files; f->filename; f++) {
+        if (!userconfig && f->userconfig) {
+            continue;
+        }
+        ret = qemu_read_config_file(f->filename);
+        if (ret < 0 && ret != -ENOENT) {
+            return ret;
+        }
+    }
+
+    return 0;
+}
+
 struct soundhw {
    const char *name;
    const char *descr;
@@ -209,6 +232,54 @@ void audio_init(void)
    }
 }

+int qemu_uuid_parse(const char *str, uint8_t *uuid)
+{
+    int ret;
+
+    if (strlen(str) != 36) {
+        return -1;
+    }
+
+    ret = sscanf(str, UUID_FMT, &uuid[0], &uuid[1], &uuid[2], &uuid[3],
+                 &uuid[4], &uuid[5], &uuid[6], &uuid[7], &uuid[8], &uuid[9],
+                 &uuid[10], &uuid[11], &uuid[12], &uuid[13], &uuid[14],
+                 &uuid[15]);
+
+    if (ret != 16) {
+        return -1;
+    }
+    return 0;
+}
+
+void do_acpitable_option(const QemuOpts *opts)
+{
+#ifdef TARGET_I386
+    Error *err = NULL;
+
+    acpi_table_add(opts, &err);
+    if (err) {
+        error_report("Wrong acpi table provided: %s",
+                     error_get_pretty(err));
+        error_free(err);
+        exit(1);
+    }
+#endif
+}
+
+void do_smbios_option(QemuOpts *opts)
+{
+#ifdef TARGET_I386
+    smbios_entry_add(opts);
+#endif
+}
+
+void cpudef_init(void)
+{
+#if defined(cpudef_setup)
+    cpudef_setup(); /* parse cpu definitions in target config file */
+#endif
+}
+
 int kvm_available(void)
 {
 #ifdef CONFIG_KVM
@@ -1,8 +1,7 @@
 /*
- * Data plane event loop
+ * QEMU System Emulator
 *
 * Copyright (c) 2003-2008 Fabrice Bellard
- * Copyright (c) 2009-2017 QEMU contributors
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
@@ -23,16 +22,11 @@
 * THE SOFTWARE.
 */

-#include "qemu/osdep.h"
-#include "qapi/error.h"
 #include "qemu-common.h"
 #include "block/aio.h"
 #include "block/thread-pool.h"
 #include "qemu/main-loop.h"
 #include "qemu/atomic.h"
-#include "block/raw-aio.h"
-#include "qemu/coroutine_int.h"
-#include "trace.h"

 /***********************************************************/
 /* bottom halves (can be seen as timers which expire ASAP) */
@@ -47,26 +41,6 @@ struct QEMUBH {
    bool deleted;
 };

-void aio_bh_schedule_oneshot(AioContext *ctx, QEMUBHFunc *cb, void *opaque)
-{
-    QEMUBH *bh;
-    bh = g_new(QEMUBH, 1);
-    *bh = (QEMUBH){
-        .ctx = ctx,
-        .cb = cb,
-        .opaque = opaque,
-    };
-    qemu_lockcnt_lock(&ctx->list_lock);
-    bh->next = ctx->first_bh;
-    bh->scheduled = 1;
-    bh->deleted = 1;
-    /* Make sure that the members are ready before putting bh into list */
-    smp_wmb();
-    ctx->first_bh = bh;
-    qemu_lockcnt_unlock(&ctx->list_lock);
-    aio_notify(ctx);
-}
-
 QEMUBH *aio_bh_new(AioContext *ctx, QEMUBHFunc *cb, void *opaque)
 {
    QEMUBH *bh;
@@ -76,70 +50,62 @@ QEMUBH *aio_bh_new(AioContext *ctx, QEMUBHFunc *cb, void *opaque)
        .cb = cb,
        .opaque = opaque,
    };
-    qemu_lockcnt_lock(&ctx->list_lock);
+    qemu_mutex_lock(&ctx->bh_lock);
    bh->next = ctx->first_bh;
    /* Make sure that the members are ready before putting bh into list */
    smp_wmb();
    ctx->first_bh = bh;
-    qemu_lockcnt_unlock(&ctx->list_lock);
+    qemu_mutex_unlock(&ctx->bh_lock);
    return bh;
 }

-void aio_bh_call(QEMUBH *bh)
-{
-    bh->cb(bh->opaque);
-}
-
-/* Multiple occurrences of aio_bh_poll cannot be called concurrently.
- * The count in ctx->list_lock is incremented before the call, and is
- * not affected by the call.
- */
+/* Multiple occurrences of aio_bh_poll cannot be called concurrently */
 int aio_bh_poll(AioContext *ctx)
 {
    QEMUBH *bh, **bhp, *next;
    int ret;
-    bool deleted = false;
+
+    ctx->walking_bh++;

    ret = 0;
-    for (bh = atomic_rcu_read(&ctx->first_bh); bh; bh = next) {
-        next = atomic_rcu_read(&bh->next);
+    for (bh = ctx->first_bh; bh; bh = next) {
+        /* Make sure that fetching bh happens before accessing its members */
+        smp_read_barrier_depends();
+        next = bh->next;
        /* The atomic_xchg is paired with the one in qemu_bh_schedule.  The
         * implicit memory barrier ensures that the callback sees all writes
         * done by the scheduling thread.  It also ensures that the scheduling
         * thread sees the zero before bh->cb has run, and thus will call
         * aio_notify again if necessary.
         */
-        if (atomic_xchg(&bh->scheduled, 0)) {
-            /* Idle BHs don't count as progress */
-            if (!bh->idle) {
+        if (!bh->deleted && atomic_xchg(&bh->scheduled, 0)) {
+            /* Idle BHs and the notify BH don't count as progress */
+            if (!bh->idle && bh != ctx->notify_dummy_bh) {
                ret = 1;
            }
            bh->idle = 0;
-            aio_bh_call(bh);
-        }
-        if (bh->deleted) {
-            deleted = true;
+            bh->cb(bh->opaque);
        }
    }

+    ctx->walking_bh--;
+
    /* remove deleted bhs */
-    if (!deleted) {
-        return ret;
-    }
-
-    if (qemu_lockcnt_dec_if_lock(&ctx->list_lock)) {
+    if (!ctx->walking_bh) {
+        qemu_mutex_lock(&ctx->bh_lock);
        bhp = &ctx->first_bh;
        while (*bhp) {
            bh = *bhp;
-            if (bh->deleted && !bh->scheduled) {
+            if (bh->deleted) {
                *bhp = bh->next;
                g_free(bh);
            } else {
                bhp = &bh->next;
            }
        }
-        qemu_lockcnt_inc_and_unlock(&ctx->list_lock);
+        qemu_mutex_unlock(&ctx->bh_lock);
    }
+
    return ret;
 }

@@ -193,9 +159,8 @@ aio_compute_timeout(AioContext *ctx)
    int timeout = -1;
    QEMUBH *bh;

-    for (bh = atomic_rcu_read(&ctx->first_bh); bh;
-         bh = atomic_rcu_read(&bh->next)) {
-        if (bh->scheduled) {
+    for (bh = ctx->first_bh; bh; bh = bh->next) {
+        if (!bh->deleted && bh->scheduled) {
            if (bh->idle) {
                /* idle bottom halves will be polled at least
                 * every 10ms */
@@ -243,9 +208,9 @@ aio_ctx_check(GSource *source)
    aio_notify_accept(ctx);

    for (bh = ctx->first_bh; bh; bh = bh->next) {
-        if (bh->scheduled) {
+        if (!bh->deleted && bh->scheduled) {
            return true;
-        }
+	}
    }
    return aio_pending(ctx) || (timerlistgroup_deadline_ns(&ctx->tlg) == 0);
 }
@@ -267,21 +232,10 @@ aio_ctx_finalize(GSource     *source)
 {
    AioContext *ctx = (AioContext *) source;

+    qemu_bh_delete(ctx->notify_dummy_bh);
    thread_pool_free(ctx->thread_pool);

-#ifdef CONFIG_LINUX_AIO
-    if (ctx->linux_aio) {
-        laio_detach_aio_context(ctx->linux_aio, ctx);
-        laio_cleanup(ctx->linux_aio);
-        ctx->linux_aio = NULL;
-    }
-#endif
-
-    assert(QSLIST_EMPTY(&ctx->scheduled_coroutines));
-    qemu_bh_delete(ctx->co_schedule_bh);
-
-    qemu_lockcnt_lock(&ctx->list_lock);
-    assert(!qemu_lockcnt_count(&ctx->list_lock));
+    qemu_mutex_lock(&ctx->bh_lock);
    while (ctx->first_bh) {
        QEMUBH *next = ctx->first_bh->next;

@@ -291,12 +245,12 @@ aio_ctx_finalize(GSource     *source)
        g_free(ctx->first_bh);
        ctx->first_bh = next;
    }
-    qemu_lockcnt_unlock(&ctx->list_lock);
+    qemu_mutex_unlock(&ctx->bh_lock);

-    aio_set_event_notifier(ctx, &ctx->notifier, false, NULL, NULL);
+    aio_set_event_notifier(ctx, &ctx->notifier, NULL);
    event_notifier_cleanup(&ctx->notifier);
-    qemu_rec_mutex_destroy(&ctx->lock);
-    qemu_lockcnt_destroy(&ctx->list_lock);
+    rfifolock_destroy(&ctx->lock);
+    qemu_mutex_destroy(&ctx->bh_lock);
    timerlistgroup_deinit(&ctx->tlg);
 }

@@ -321,17 +275,6 @@ ThreadPool *aio_get_thread_pool(AioContext *ctx)
    return ctx->thread_pool;
 }

-#ifdef CONFIG_LINUX_AIO
-LinuxAioState *aio_get_linux_aio(AioContext *ctx)
-{
-    if (!ctx->linux_aio) {
-        ctx->linux_aio = laio_init();
-        laio_attach_aio_context(ctx->linux_aio, ctx);
-    }
-    return ctx->linux_aio;
-}
-#endif
-
 void aio_notify(AioContext *ctx)
 {
    /* Write e.g. bh->scheduled before reading ctx->notify_me.  Pairs
@@ -351,127 +294,51 @@ void aio_notify_accept(AioContext *ctx)
    }
 }

-static void aio_timerlist_notify(void *opaque, QEMUClockType type)
+static void aio_timerlist_notify(void *opaque)
 {
    aio_notify(opaque);
 }

+static void aio_rfifolock_cb(void *opaque)
+{
+    AioContext *ctx = opaque;
+
+    /* Kick owner thread in case they are blocked in aio_poll() */
+    qemu_bh_schedule(ctx->notify_dummy_bh);
+}
+
+static void notify_dummy_bh(void *opaque)
+{
+    /* Do nothing, we were invoked just to force the event loop to iterate */
+}
+
 static void event_notifier_dummy_cb(EventNotifier *e)
 {
 }

-/* Returns true if aio_notify() was called (e.g. a BH was scheduled) */
-static bool event_notifier_poll(void *opaque)
-{
-    EventNotifier *e = opaque;
-    AioContext *ctx = container_of(e, AioContext, notifier);
-
-    return atomic_read(&ctx->notified);
-}
-
-static void co_schedule_bh_cb(void *opaque)
-{
-    AioContext *ctx = opaque;
-    QSLIST_HEAD(, Coroutine) straight, reversed;
-
-    QSLIST_MOVE_ATOMIC(&reversed, &ctx->scheduled_coroutines);
-    QSLIST_INIT(&straight);
-
-    while (!QSLIST_EMPTY(&reversed)) {
-        Coroutine *co = QSLIST_FIRST(&reversed);
-        QSLIST_REMOVE_HEAD(&reversed, co_scheduled_next);
-        QSLIST_INSERT_HEAD(&straight, co, co_scheduled_next);
-    }
-
-    while (!QSLIST_EMPTY(&straight)) {
-        Coroutine *co = QSLIST_FIRST(&straight);
-        QSLIST_REMOVE_HEAD(&straight, co_scheduled_next);
-        trace_aio_co_schedule_bh_cb(ctx, co);
-        aio_context_acquire(ctx);
-        qemu_coroutine_enter(co);
-        aio_context_release(ctx);
-    }
-}
-
 AioContext *aio_context_new(Error **errp)
 {
    int ret;
    AioContext *ctx;
-
    ctx = (AioContext *) g_source_new(&aio_source_funcs, sizeof(AioContext));
-    aio_context_setup(ctx);
-
    ret = event_notifier_init(&ctx->notifier, false);
    if (ret < 0) {
+        g_source_destroy(&ctx->source);
        error_setg_errno(errp, -ret, "Failed to initialize event notifier");
-        goto fail;
+        return NULL;
    }
    g_source_set_can_recurse(&ctx->source, true);
-    qemu_lockcnt_init(&ctx->list_lock);
-
-    ctx->co_schedule_bh = aio_bh_new(ctx, co_schedule_bh_cb, ctx);
-    QSLIST_INIT(&ctx->scheduled_coroutines);
-
    aio_set_event_notifier(ctx, &ctx->notifier,
-                           false,
                           (EventNotifierHandler *)
-                           event_notifier_dummy_cb,
-                           event_notifier_poll);
-#ifdef CONFIG_LINUX_AIO
-    ctx->linux_aio = NULL;
-#endif
+                           event_notifier_dummy_cb);
    ctx->thread_pool = NULL;
-    qemu_rec_mutex_init(&ctx->lock);
+    qemu_mutex_init(&ctx->bh_lock);
+    rfifolock_init(&ctx->lock, aio_rfifolock_cb, ctx);
    timerlistgroup_init(&ctx->tlg, aio_timerlist_notify, ctx);

-    ctx->poll_ns = 0;
-    ctx->poll_max_ns = 0;
-    ctx->poll_grow = 0;
-    ctx->poll_shrink = 0;
+    ctx->notify_dummy_bh = aio_bh_new(ctx, notify_dummy_bh, NULL);

    return ctx;
-fail:
-    g_source_destroy(&ctx->source);
-    return NULL;
-}
-
-void aio_co_schedule(AioContext *ctx, Coroutine *co)
-{
-    trace_aio_co_schedule(ctx, co);
-    QSLIST_INSERT_HEAD_ATOMIC(&ctx->scheduled_coroutines,
-                              co, co_scheduled_next);
-    qemu_bh_schedule(ctx->co_schedule_bh);
-}
-
-void aio_co_wake(struct Coroutine *co)
-{
-    AioContext *ctx;
-
-    /* Read coroutine before co->ctx.  Matches smp_wmb in
-     * qemu_coroutine_enter.
-     */
-    smp_read_barrier_depends();
-    ctx = atomic_read(&co->ctx);
-
-    aio_co_enter(ctx, co);
-}
-
-void aio_co_enter(AioContext *ctx, struct Coroutine *co)
-{
-    if (ctx != qemu_get_current_aio_context()) {
-        aio_co_schedule(ctx, co);
-        return;
-    }
-
-    if (qemu_in_coroutine()) {
-        Coroutine *self = qemu_coroutine_self();
-        assert(self != co);
-        QSIMPLEQ_INSERT_TAIL(&self->co_queue_wakeup, co, co_queue_next);
-    } else {
-        aio_context_acquire(ctx);
-        qemu_aio_coroutine_enter(ctx, co);
-        aio_context_release(ctx);
-    }
 }

 void aio_context_ref(AioContext *ctx)
@@ -486,10 +353,10 @@ void aio_context_unref(AioContext *ctx)

 void aio_context_acquire(AioContext *ctx)
 {
-    qemu_rec_mutex_lock(&ctx->lock);
+    rfifolock_lock(&ctx->lock);
 }

 void aio_context_release(AioContext *ctx)
 {
-    qemu_rec_mutex_unlock(&ctx->lock);
+    rfifolock_unlock(&ctx->lock);
 }
@@ -1,215 +0,0 @@
-/*
- * Atomic helper templates
- * Included from tcg-runtime.c and cputlb.c.
- *
- * Copyright (c) 2016 Red Hat, Inc
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, see <http://www.gnu.org/licenses/>.
- */
-
-#if DATA_SIZE == 16
-# define SUFFIX     o
-# define DATA_TYPE  Int128
-# define BSWAP      bswap128
-#elif DATA_SIZE == 8
-# define SUFFIX     q
-# define DATA_TYPE  uint64_t
-# define BSWAP      bswap64
-#elif DATA_SIZE == 4
-# define SUFFIX     l
-# define DATA_TYPE  uint32_t
-# define BSWAP      bswap32
-#elif DATA_SIZE == 2
-# define SUFFIX     w
-# define DATA_TYPE  uint16_t
-# define BSWAP      bswap16
-#elif DATA_SIZE == 1
-# define SUFFIX     b
-# define DATA_TYPE  uint8_t
-# define BSWAP
-#else
-# error unsupported data size
-#endif
-
-#if DATA_SIZE >= 4
-# define ABI_TYPE  DATA_TYPE
-#else
-# define ABI_TYPE  uint32_t
-#endif
-
-/* Define host-endian atomic operations.  Note that END is used within
-   the ATOMIC_NAME macro, and redefined below.  */
-#if DATA_SIZE == 1
-# define END
-#elif defined(HOST_WORDS_BIGENDIAN)
-# define END  _be
-#else
-# define END  _le
-#endif
-
-ABI_TYPE ATOMIC_NAME(cmpxchg)(CPUArchState *env, target_ulong addr,
-                              ABI_TYPE cmpv, ABI_TYPE newv EXTRA_ARGS)
-{
-    DATA_TYPE *haddr = ATOMIC_MMU_LOOKUP;
-    return atomic_cmpxchg__nocheck(haddr, cmpv, newv);
-}
-
-#if DATA_SIZE >= 16
-ABI_TYPE ATOMIC_NAME(ld)(CPUArchState *env, target_ulong addr EXTRA_ARGS)
-{
-    DATA_TYPE val, *haddr = ATOMIC_MMU_LOOKUP;
-    __atomic_load(haddr, &val, __ATOMIC_RELAXED);
-    return val;
-}
-
-void ATOMIC_NAME(st)(CPUArchState *env, target_ulong addr,
-                     ABI_TYPE val EXTRA_ARGS)
-{
-    DATA_TYPE *haddr = ATOMIC_MMU_LOOKUP;
-    __atomic_store(haddr, &val, __ATOMIC_RELAXED);
-}
-#else
-ABI_TYPE ATOMIC_NAME(xchg)(CPUArchState *env, target_ulong addr,
-                           ABI_TYPE val EXTRA_ARGS)
-{
-    DATA_TYPE *haddr = ATOMIC_MMU_LOOKUP;
-    return atomic_xchg__nocheck(haddr, val);
-}
-
-#define GEN_ATOMIC_HELPER(X)                                        \
-ABI_TYPE ATOMIC_NAME(X)(CPUArchState *env, target_ulong addr,       \
-                 ABI_TYPE val EXTRA_ARGS)                           \
-{                                                                   \
-    DATA_TYPE *haddr = ATOMIC_MMU_LOOKUP;                           \
-    return atomic_##X(haddr, val);                                  \
-}                                                                   \
-
-GEN_ATOMIC_HELPER(fetch_add)
-GEN_ATOMIC_HELPER(fetch_and)
-GEN_ATOMIC_HELPER(fetch_or)
-GEN_ATOMIC_HELPER(fetch_xor)
-GEN_ATOMIC_HELPER(add_fetch)
-GEN_ATOMIC_HELPER(and_fetch)
-GEN_ATOMIC_HELPER(or_fetch)
-GEN_ATOMIC_HELPER(xor_fetch)
-
-#undef GEN_ATOMIC_HELPER
-#endif /* DATA SIZE >= 16 */
-
-#undef END
-
-#if DATA_SIZE > 1
-
-/* Define reverse-host-endian atomic operations.  Note that END is used
-   within the ATOMIC_NAME macro.  */
-#ifdef HOST_WORDS_BIGENDIAN
-# define END  _le
-#else
-# define END  _be
-#endif
-
-ABI_TYPE ATOMIC_NAME(cmpxchg)(CPUArchState *env, target_ulong addr,
-                              ABI_TYPE cmpv, ABI_TYPE newv EXTRA_ARGS)
-{
-    DATA_TYPE *haddr = ATOMIC_MMU_LOOKUP;
-    return BSWAP(atomic_cmpxchg__nocheck(haddr, BSWAP(cmpv), BSWAP(newv)));
-}
-
-#if DATA_SIZE >= 16
-ABI_TYPE ATOMIC_NAME(ld)(CPUArchState *env, target_ulong addr EXTRA_ARGS)
-{
-    DATA_TYPE val, *haddr = ATOMIC_MMU_LOOKUP;
-    __atomic_load(haddr, &val, __ATOMIC_RELAXED);
-    return BSWAP(val);
-}
-
-void ATOMIC_NAME(st)(CPUArchState *env, target_ulong addr,
-                     ABI_TYPE val EXTRA_ARGS)
-{
-    DATA_TYPE *haddr = ATOMIC_MMU_LOOKUP;
-    val = BSWAP(val);
-    __atomic_store(haddr, &val, __ATOMIC_RELAXED);
-}
-#else
-ABI_TYPE ATOMIC_NAME(xchg)(CPUArchState *env, target_ulong addr,
-                           ABI_TYPE val EXTRA_ARGS)
-{
-    DATA_TYPE *haddr = ATOMIC_MMU_LOOKUP;
-    return BSWAP(atomic_xchg__nocheck(haddr, BSWAP(val)));
-}
-
-#define GEN_ATOMIC_HELPER(X)                                        \
-ABI_TYPE ATOMIC_NAME(X)(CPUArchState *env, target_ulong addr,       \
-                 ABI_TYPE val EXTRA_ARGS)                           \
-{                                                                   \
-    DATA_TYPE *haddr = ATOMIC_MMU_LOOKUP;                           \
-    return BSWAP(atomic_##X(haddr, BSWAP(val)));                    \
-}
-
-GEN_ATOMIC_HELPER(fetch_and)
-GEN_ATOMIC_HELPER(fetch_or)
-GEN_ATOMIC_HELPER(fetch_xor)
-GEN_ATOMIC_HELPER(and_fetch)
-GEN_ATOMIC_HELPER(or_fetch)
-GEN_ATOMIC_HELPER(xor_fetch)
-
-#undef GEN_ATOMIC_HELPER
-
-/* Note that for addition, we need to use a separate cmpxchg loop instead
-   of bswaps for the reverse-host-endian helpers.  */
-ABI_TYPE ATOMIC_NAME(fetch_add)(CPUArchState *env, target_ulong addr,
-                         ABI_TYPE val EXTRA_ARGS)
-{
-    DATA_TYPE *haddr = ATOMIC_MMU_LOOKUP;
-    DATA_TYPE ldo, ldn, ret, sto;
-
-    ldo = atomic_read__nocheck(haddr);
-    while (1) {
-        ret = BSWAP(ldo);
-        sto = BSWAP(ret + val);
-        ldn = atomic_cmpxchg__nocheck(haddr, ldo, sto);
-        if (ldn == ldo) {
-            return ret;
-        }
-        ldo = ldn;
-    }
-}
-
-ABI_TYPE ATOMIC_NAME(add_fetch)(CPUArchState *env, target_ulong addr,
-                         ABI_TYPE val EXTRA_ARGS)
-{
-    DATA_TYPE *haddr = ATOMIC_MMU_LOOKUP;
-    DATA_TYPE ldo, ldn, ret, sto;
-
-    ldo = atomic_read__nocheck(haddr);
-    while (1) {
-        ret = BSWAP(ldo) + val;
-        sto = BSWAP(ret);
-        ldn = atomic_cmpxchg__nocheck(haddr, ldo, sto);
-        if (ldn == ldo) {
-            return ret;
-        }
-        ldo = ldn;
-    }
-}
-#endif /* DATA_SIZE >= 16 */
-
-#undef END
-#endif /* DATA_SIZE > 1 */
-
-#undef BSWAP
-#undef ABI_TYPE
-#undef DATA_TYPE
-#undef SUFFIX
-#undef DATA_SIZE
@@ -21,7 +21,6 @@
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
-#include "qemu/osdep.h"
 #include <alsa/asoundlib.h>
 #include "qemu-common.h"
 #include "qemu/main-loop.h"
@@ -21,14 +21,11 @@
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
-#include "qemu/osdep.h"
 #include "hw/hw.h"
 #include "audio.h"
 #include "monitor/monitor.h"
 #include "qemu/timer.h"
 #include "sysemu/sysemu.h"
-#include "qemu/cutils.h"
-#include "sysemu/replay.h"

 #define AUDIO_CAP "audio"
 #include "audio_int.h"
@@ -1113,7 +1110,7 @@ static int audio_is_timer_needed (void)
 static void audio_reset_timer (AudioState *s)
 {
    if (audio_is_timer_needed ()) {
-        timer_mod_anticipate_ns(s->ts,
+        timer_mod (s->ts,
            qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + conf.period.ticks);
    }
    else {
@@ -1132,6 +1129,8 @@ static void audio_timer (void *opaque)
 */
 int AUD_write (SWVoiceOut *sw, void *buf, int size)
 {
+    int bytes;
+
    if (!sw) {
        /* XXX: Consider options */
        return size;
@@ -1142,11 +1141,14 @@ int AUD_write (SWVoiceOut *sw, void *buf, int size)
        return 0;
    }

-    return sw->hw->pcm_ops->write(sw, buf, size);
+    bytes = sw->hw->pcm_ops->write (sw, buf, size);
+    return bytes;
 }

 int AUD_read (SWVoiceIn *sw, void *buf, int size)
 {
+    int bytes;
+
    if (!sw) {
        /* XXX: Consider options */
        return size;
@@ -1157,7 +1159,8 @@ int AUD_read (SWVoiceIn *sw, void *buf, int size)
        return 0;
    }

-    return sw->hw->pcm_ops->read(sw, buf, size);
+    bytes = sw->hw->pcm_ops->read (sw, buf, size);
+    return bytes;
 }

 int AUD_get_buffer_size_out (SWVoiceOut *sw)
@@ -1388,7 +1391,6 @@ static void audio_run_out (AudioState *s)

        prev_rpos = hw->rpos;
        played = hw->pcm_ops->run_out (hw, live);
-        replay_audio_out(&played);
        if (audio_bug (AUDIO_FUNC, hw->rpos >= hw->samples)) {
            dolog ("hw->rpos=%d hw->samples=%d played=%d\n",
                   hw->rpos, hw->samples, played);
@@ -1452,12 +1454,9 @@ static void audio_run_in (AudioState *s)

    while ((hw = audio_pcm_hw_find_any_enabled_in (hw))) {
        SWVoiceIn *sw;
-        int captured = 0, min;
+        int captured, min;

-        if (replay_mode != REPLAY_MODE_PLAY) {
-            captured = hw->pcm_ops->run_in(hw);
-        }
-        replay_audio_in(&captured, hw->conv_buf, &hw->wpos, hw->samples);
+        captured = hw->pcm_ops->run_in (hw);

        min = audio_pcm_hw_find_min_in (hw);
        hw->total_samples_captured += captured - min;
@@ -1744,21 +1743,13 @@ static void audio_vm_change_state_handler (void *opaque, int running,
    audio_reset_timer (s);
 }

-static bool is_cleaning_up;
-
-bool audio_is_cleaning_up(void)
-{
-    return is_cleaning_up;
-}
-
-void audio_cleanup(void)
+static void audio_atexit (void)
 {
    AudioState *s = &glob_audio_state;
-    HWVoiceOut *hwo, *hwon;
-    HWVoiceIn *hwi, *hwin;
+    HWVoiceOut *hwo = NULL;
+    HWVoiceIn *hwi = NULL;

-    is_cleaning_up = true;
-    QLIST_FOREACH_SAFE(hwo, &glob_audio_state.hw_head_out, entries, hwon) {
+    while ((hwo = audio_pcm_hw_find_any_out (hwo))) {
        SWVoiceCap *sc;

        if (hwo->enabled) {
@@ -1774,20 +1765,17 @@ void audio_cleanup(void)
                cb->ops.destroy (cb->opaque);
            }
        }
-        QLIST_REMOVE(hwo, entries);
    }

-    QLIST_FOREACH_SAFE(hwi, &glob_audio_state.hw_head_in, entries, hwin) {
+    while ((hwi = audio_pcm_hw_find_any_in (hwi))) {
        if (hwi->enabled) {
            hwi->pcm_ops->ctl_in (hwi, VOICE_DISABLE);
        }
        hwi->pcm_ops->fini_in (hwi);
-        QLIST_REMOVE(hwi, entries);
    }

    if (s->drv) {
        s->drv->fini (s->drv_opaque);
-        s->drv = NULL;
    }
 }

@@ -1815,9 +1803,12 @@ static void audio_init (void)
    QLIST_INIT (&s->hw_head_out);
    QLIST_INIT (&s->hw_head_in);
    QLIST_INIT (&s->cap_head);
-    atexit(audio_cleanup);
+    atexit (audio_atexit);

    s->ts = timer_new_ns(QEMU_CLOCK_VIRTUAL, audio_timer, s);
+    if (!s->ts) {
+        hw_error("Could not create audio timer\n");
+    }

    audio_process_options ("AUDIO", audio_options);

@@ -1868,8 +1859,12 @@ static void audio_init (void)

    if (!done) {
        done = !audio_driver_init (s, &no_audio_driver);
-        assert(done);
-        dolog("warning: Using timer based audio emulation\n");
+        if (!done) {
+            hw_error("Could not initialize audio subsystem\n");
+        }
+        else {
+            dolog ("warning: Using timer based audio emulation\n");
+        }
    }

    if (conf.period.hertz <= 0) {
@@ -1880,7 +1875,8 @@ static void audio_init (void)
        }
        conf.period.ticks = 1;
    } else {
-        conf.period.ticks = NANOSECONDS_PER_SECOND / conf.period.hertz;
+        conf.period.ticks =
+            muldiv64 (1, get_ticks_per_sec (), conf.period.hertz);
    }

    e = qemu_add_vm_change_state_handler (audio_vm_change_state_handler, s);
@@ -1982,7 +1978,8 @@ CaptureVoiceOut *AUD_add_capture (
        QLIST_INSERT_HEAD (&s->cap_head, cap, entries);
        QLIST_INSERT_HEAD (&cap->cb_head, cb, entries);

-        QLIST_FOREACH(hw, &glob_audio_state.hw_head_out, entries) {
+        hw = NULL;
+        while ((hw = audio_pcm_hw_find_any_out (hw))) {
            audio_attach_capture (hw);
        }
        return cap;
@@ -2028,8 +2025,6 @@ void AUD_del_capture (CaptureVoiceOut *cap, void *cb_opaque)
                    sw = sw1;
                }
                QLIST_REMOVE (cap, entries);
-                g_free (cap->hw.mix_buf);
-                g_free (cap->buf);
                g_free (cap);
            }
            return;
@@ -21,10 +21,10 @@
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
-
 #ifndef QEMU_AUDIO_H
 #define QEMU_AUDIO_H

+#include "config-host.h"
 #include "qemu/queue.h"

 typedef void (*audio_callback_fn) (void *opaque, int avail);
@@ -163,12 +163,4 @@ static inline void *advance (void *p, int incr)
 int wav_start_capture (CaptureState *s, const char *path, int freq,
                       int bits, int nchannels);

-bool audio_is_cleaning_up(void);
-void audio_cleanup(void);
-
-void audio_sample_to_uint64(void *samples, int pos,
-                            uint64_t *left, uint64_t *right);
-void audio_sample_from_uint64(void *samples, int pos,
-                            uint64_t left, uint64_t right);
-
-#endif /* QEMU_AUDIO_H */
+#endif  /* audio.h */
@@ -21,7 +21,6 @@
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
-
 #ifndef QEMU_AUDIO_INT_H
 #define QEMU_AUDIO_INT_H

@@ -258,4 +257,4 @@ static inline int audio_ring_dist (int dst, int src, int len)
 #define AUDIO_FUNC __FILE__ ":" AUDIO_STRINGIFY (__LINE__)
 #endif

-#endif /* QEMU_AUDIO_INT_H */
+#endif /* audio_int.h */
@@ -1,4 +1,3 @@
-#include "qemu/osdep.h"
 #include "qemu-common.h"
 #include "audio.h"

@@ -19,4 +19,4 @@ int audio_pt_wait (struct audio_pt *, const char *);
 int audio_pt_unlock_and_signal (struct audio_pt *, const char *);
 int audio_pt_join (struct audio_pt *, void **, const char *);

-#endif /* QEMU_AUDIO_PT_INT_H */
+#endif /* audio_pt_int.h */
@@ -1,6 +1,5 @@
 /* public domain */

-#include "qemu/osdep.h"
 #include "qemu-common.h"

 #define AUDIO_CAP "win-int"
@@ -22,8 +22,8 @@
 * THE SOFTWARE.
 */

-#include "qemu/osdep.h"
 #include <CoreAudio/CoreAudio.h>
+#include <string.h>             /* strerror */
 #include <pthread.h>            /* pthread_X */

 #include "qemu-common.h"
@@ -32,9 +32,7 @@
 #define AUDIO_CAP "coreaudio"
 #include "audio_int.h"

-#ifndef MAC_OS_X_VERSION_10_6
-#define MAC_OS_X_VERSION_10_6 1060
-#endif
+static int isAtexit;

 typedef struct {
    int buffer_frames;
@@ -47,233 +45,11 @@ typedef struct coreaudioVoiceOut {
    AudioDeviceID outputDeviceID;
    UInt32 audioDevicePropertyBufferFrameSize;
    AudioStreamBasicDescription outputStreamBasicDescription;
-    AudioDeviceIOProcID ioprocid;
    int live;
    int decr;
    int rpos;
 } coreaudioVoiceOut;

-#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_6
-/* The APIs used here only become available from 10.6 */
-
-static OSStatus coreaudio_get_voice(AudioDeviceID *id)
-{
-    UInt32 size = sizeof(*id);
-    AudioObjectPropertyAddress addr = {
-        kAudioHardwarePropertyDefaultOutputDevice,
-        kAudioObjectPropertyScopeGlobal,
-        kAudioObjectPropertyElementMaster
-    };
-
-    return AudioObjectGetPropertyData(kAudioObjectSystemObject,
-                                      &addr,
-                                      0,
-                                      NULL,
-                                      &size,
-                                      id);
-}
-
-static OSStatus coreaudio_get_framesizerange(AudioDeviceID id,
-                                             AudioValueRange *framerange)
-{
-    UInt32 size = sizeof(*framerange);
-    AudioObjectPropertyAddress addr = {
-        kAudioDevicePropertyBufferFrameSizeRange,
-        kAudioDevicePropertyScopeOutput,
-        kAudioObjectPropertyElementMaster
-    };
-
-    return AudioObjectGetPropertyData(id,
-                                      &addr,
-                                      0,
-                                      NULL,
-                                      &size,
-                                      framerange);
-}
-
-static OSStatus coreaudio_get_framesize(AudioDeviceID id, UInt32 *framesize)
-{
-    UInt32 size = sizeof(*framesize);
-    AudioObjectPropertyAddress addr = {
-        kAudioDevicePropertyBufferFrameSize,
-        kAudioDevicePropertyScopeOutput,
-        kAudioObjectPropertyElementMaster
-    };
-
-    return AudioObjectGetPropertyData(id,
-                                      &addr,
-                                      0,
-                                      NULL,
-                                      &size,
-                                      framesize);
-}
-
-static OSStatus coreaudio_set_framesize(AudioDeviceID id, UInt32 *framesize)
-{
-    UInt32 size = sizeof(*framesize);
-    AudioObjectPropertyAddress addr = {
-        kAudioDevicePropertyBufferFrameSize,
-        kAudioDevicePropertyScopeOutput,
-        kAudioObjectPropertyElementMaster
-    };
-
-    return AudioObjectSetPropertyData(id,
-                                      &addr,
-                                      0,
-                                      NULL,
-                                      size,
-                                      framesize);
-}
-
-static OSStatus coreaudio_get_streamformat(AudioDeviceID id,
-                                           AudioStreamBasicDescription *d)
-{
-    UInt32 size = sizeof(*d);
-    AudioObjectPropertyAddress addr = {
-        kAudioDevicePropertyStreamFormat,
-        kAudioDevicePropertyScopeOutput,
-        kAudioObjectPropertyElementMaster
-    };
-
-    return AudioObjectGetPropertyData(id,
-                                      &addr,
-                                      0,
-                                      NULL,
-                                      &size,
-                                      d);
-}
-
-static OSStatus coreaudio_set_streamformat(AudioDeviceID id,
-                                           AudioStreamBasicDescription *d)
-{
-    UInt32 size = sizeof(*d);
-    AudioObjectPropertyAddress addr = {
-        kAudioDevicePropertyStreamFormat,
-        kAudioDevicePropertyScopeOutput,
-        kAudioObjectPropertyElementMaster
-    };
-
-    return AudioObjectSetPropertyData(id,
-                                      &addr,
-                                      0,
-                                      NULL,
-                                      size,
-                                      d);
-}
-
-static OSStatus coreaudio_get_isrunning(AudioDeviceID id, UInt32 *result)
-{
-    UInt32 size = sizeof(*result);
-    AudioObjectPropertyAddress addr = {
-        kAudioDevicePropertyDeviceIsRunning,
-        kAudioDevicePropertyScopeOutput,
-        kAudioObjectPropertyElementMaster
-    };
-
-    return AudioObjectGetPropertyData(id,
-                                      &addr,
-                                      0,
-                                      NULL,
-                                      &size,
-                                      result);
-}
-#else
-/* Legacy versions of functions using deprecated APIs */
-
-static OSStatus coreaudio_get_voice(AudioDeviceID *id)
-{
-    UInt32 size = sizeof(*id);
-
-    return AudioHardwareGetProperty(
-        kAudioHardwarePropertyDefaultOutputDevice,
-        &size,
-        id);
-}
-
-static OSStatus coreaudio_get_framesizerange(AudioDeviceID id,
-                                             AudioValueRange *framerange)
-{
-    UInt32 size = sizeof(*framerange);
-
-    return AudioDeviceGetProperty(
-        id,
-        0,
-        0,
-        kAudioDevicePropertyBufferFrameSizeRange,
-        &size,
-        framerange);
-}
-
-static OSStatus coreaudio_get_framesize(AudioDeviceID id, UInt32 *framesize)
-{
-    UInt32 size = sizeof(*framesize);
-
-    return AudioDeviceGetProperty(
-        id,
-        0,
-        false,
-        kAudioDevicePropertyBufferFrameSize,
-        &size,
-        framesize);
-}
-
-static OSStatus coreaudio_set_framesize(AudioDeviceID id, UInt32 *framesize)
-{
-    UInt32 size = sizeof(*framesize);
-
-    return AudioDeviceSetProperty(
-        id,
-        NULL,
-        0,
-        false,
-        kAudioDevicePropertyBufferFrameSize,
-        size,
-        framesize);
-}
-
-static OSStatus coreaudio_get_streamformat(AudioDeviceID id,
-                                           AudioStreamBasicDescription *d)
-{
-    UInt32 size = sizeof(*d);
-
-    return AudioDeviceGetProperty(
-        id,
-        0,
-        false,
-        kAudioDevicePropertyStreamFormat,
-        &size,
-        d);
-}
-
-static OSStatus coreaudio_set_streamformat(AudioDeviceID id,
-                                           AudioStreamBasicDescription *d)
-{
-    UInt32 size = sizeof(*d);
-
-    return AudioDeviceSetProperty(
-        id,
-        0,
-        0,
-        0,
-        kAudioDevicePropertyStreamFormat,
-        size,
-        d);
-}
-
-static OSStatus coreaudio_get_isrunning(AudioDeviceID id, UInt32 *result)
-{
-    UInt32 size = sizeof(*result);
-
-    return AudioDeviceGetProperty(
-        id,
-        0,
-        0,
-        kAudioDevicePropertyDeviceIsRunning,
-        &size,
-        result);
-}
-#endif
-
 static void coreaudio_logstatus (OSStatus status)
 {
    const char *str = "BUG";
@@ -368,7 +144,10 @@ static inline UInt32 isPlaying (AudioDeviceID outputDeviceID)
 {
    OSStatus status;
    UInt32 result = 0;
-    status = coreaudio_get_isrunning(outputDeviceID, &result);
+    UInt32 propertySize = sizeof(outputDeviceID);
+    status = AudioDeviceGetProperty(
+        outputDeviceID, 0, 0,
+        kAudioDevicePropertyDeviceIsRunning, &propertySize, &result);
    if (status != kAudioHardwareNoError) {
        coreaudio_logerr(status,
                         "Could not determine whether Device is playing\n");
@@ -376,6 +155,11 @@ static inline UInt32 isPlaying (AudioDeviceID outputDeviceID)
    return result;
 }

+static void coreaudio_atexit (void)
+{
+    isAtexit = 1;
+}
+
 static int coreaudio_lock (coreaudioVoiceOut *core, const char *fn_name)
 {
    int err;
@@ -504,6 +288,7 @@ static int coreaudio_init_out(HWVoiceOut *hw, struct audsettings *as,
 {
    OSStatus status;
    coreaudioVoiceOut *core = (coreaudioVoiceOut *) hw;
+    UInt32 propertySize;
    int err;
    const char *typ = "playback";
    AudioValueRange frameRange;
@@ -518,7 +303,12 @@ static int coreaudio_init_out(HWVoiceOut *hw, struct audsettings *as,

    audio_pcm_init_info (&hw->info, as);

-    status = coreaudio_get_voice(&core->outputDeviceID);
+    /* open default output device */
+    propertySize = sizeof(core->outputDeviceID);
+    status = AudioHardwareGetProperty(
+        kAudioHardwarePropertyDefaultOutputDevice,
+        &propertySize,
+        &core->outputDeviceID);
    if (status != kAudioHardwareNoError) {
        coreaudio_logerr2 (status, typ,
                           "Could not get default output Device\n");
@@ -530,8 +320,14 @@ static int coreaudio_init_out(HWVoiceOut *hw, struct audsettings *as,
    }

    /* get minimum and maximum buffer frame sizes */
-    status = coreaudio_get_framesizerange(core->outputDeviceID,
-                                          &frameRange);
+    propertySize = sizeof(frameRange);
+    status = AudioDeviceGetProperty(
+        core->outputDeviceID,
+        0,
+        0,
+        kAudioDevicePropertyBufferFrameSizeRange,
+        &propertySize,
+        &frameRange);
    if (status != kAudioHardwareNoError) {
        coreaudio_logerr2 (status, typ,
                           "Could not get device buffer frame range\n");
@@ -551,8 +347,15 @@ static int coreaudio_init_out(HWVoiceOut *hw, struct audsettings *as,
    }

    /* set Buffer Frame Size */
-    status = coreaudio_set_framesize(core->outputDeviceID,
-                                     &core->audioDevicePropertyBufferFrameSize);
+    propertySize = sizeof(core->audioDevicePropertyBufferFrameSize);
+    status = AudioDeviceSetProperty(
+        core->outputDeviceID,
+        NULL,
+        0,
+        false,
+        kAudioDevicePropertyBufferFrameSize,
+        propertySize,
+        &core->audioDevicePropertyBufferFrameSize);
    if (status != kAudioHardwareNoError) {
        coreaudio_logerr2 (status, typ,
                           "Could not set device buffer frame size %" PRIu32 "\n",
@@ -561,8 +364,14 @@ static int coreaudio_init_out(HWVoiceOut *hw, struct audsettings *as,
    }

    /* get Buffer Frame Size */
-    status = coreaudio_get_framesize(core->outputDeviceID,
-                                     &core->audioDevicePropertyBufferFrameSize);
+    propertySize = sizeof(core->audioDevicePropertyBufferFrameSize);
+    status = AudioDeviceGetProperty(
+        core->outputDeviceID,
+        0,
+        false,
+        kAudioDevicePropertyBufferFrameSize,
+        &propertySize,
+        &core->audioDevicePropertyBufferFrameSize);
    if (status != kAudioHardwareNoError) {
        coreaudio_logerr2 (status, typ,
                           "Could not get device buffer frame size\n");
@@ -571,8 +380,14 @@ static int coreaudio_init_out(HWVoiceOut *hw, struct audsettings *as,
    hw->samples = conf->nbuffers * core->audioDevicePropertyBufferFrameSize;

    /* get StreamFormat */
-    status = coreaudio_get_streamformat(core->outputDeviceID,
-                                        &core->outputStreamBasicDescription);
+    propertySize = sizeof(core->outputStreamBasicDescription);
+    status = AudioDeviceGetProperty(
+        core->outputDeviceID,
+        0,
+        false,
+        kAudioDevicePropertyStreamFormat,
+        &propertySize,
+        &core->outputStreamBasicDescription);
    if (status != kAudioHardwareNoError) {
        coreaudio_logerr2 (status, typ,
                           "Could not get Device Stream properties\n");
@@ -582,8 +397,15 @@ static int coreaudio_init_out(HWVoiceOut *hw, struct audsettings *as,

    /* set Samplerate */
    core->outputStreamBasicDescription.mSampleRate = (Float64) as->freq;
-    status = coreaudio_set_streamformat(core->outputDeviceID,
-                                        &core->outputStreamBasicDescription);
+    propertySize = sizeof(core->outputStreamBasicDescription);
+    status = AudioDeviceSetProperty(
+        core->outputDeviceID,
+        0,
+        0,
+        0,
+        kAudioDevicePropertyStreamFormat,
+        propertySize,
+        &core->outputStreamBasicDescription);
    if (status != kAudioHardwareNoError) {
        coreaudio_logerr2 (status, typ, "Could not set samplerate %d\n",
                           as->freq);
@@ -592,12 +414,8 @@ static int coreaudio_init_out(HWVoiceOut *hw, struct audsettings *as,
    }

    /* set Callback */
-    core->ioprocid = NULL;
-    status = AudioDeviceCreateIOProcID(core->outputDeviceID,
-                                       audioDeviceIOProc,
-                                       hw,
-                                       &core->ioprocid);
-    if (status != kAudioHardwareNoError || core->ioprocid == NULL) {
+    status = AudioDeviceAddIOProc(core->outputDeviceID, audioDeviceIOProc, hw);
+    if (status != kAudioHardwareNoError) {
        coreaudio_logerr2 (status, typ, "Could not set IOProc\n");
        core->outputDeviceID = kAudioDeviceUnknown;
        return -1;
@@ -605,10 +423,10 @@ static int coreaudio_init_out(HWVoiceOut *hw, struct audsettings *as,

    /* start Playback */
    if (!isPlaying(core->outputDeviceID)) {
-        status = AudioDeviceStart(core->outputDeviceID, core->ioprocid);
+        status = AudioDeviceStart(core->outputDeviceID, audioDeviceIOProc);
        if (status != kAudioHardwareNoError) {
            coreaudio_logerr2 (status, typ, "Could not start playback\n");
-            AudioDeviceDestroyIOProcID(core->outputDeviceID, core->ioprocid);
+            AudioDeviceRemoveIOProc(core->outputDeviceID, audioDeviceIOProc);
            core->outputDeviceID = kAudioDeviceUnknown;
            return -1;
        }
@@ -623,18 +441,18 @@ static void coreaudio_fini_out (HWVoiceOut *hw)
    int err;
    coreaudioVoiceOut *core = (coreaudioVoiceOut *) hw;

-    if (!audio_is_cleaning_up()) {
+    if (!isAtexit) {
        /* stop playback */
        if (isPlaying(core->outputDeviceID)) {
-            status = AudioDeviceStop(core->outputDeviceID, core->ioprocid);
+            status = AudioDeviceStop(core->outputDeviceID, audioDeviceIOProc);
            if (status != kAudioHardwareNoError) {
                coreaudio_logerr (status, "Could not stop playback\n");
            }
        }

        /* remove callback */
-        status = AudioDeviceDestroyIOProcID(core->outputDeviceID,
-                                            core->ioprocid);
+        status = AudioDeviceRemoveIOProc(core->outputDeviceID,
+                                         audioDeviceIOProc);
        if (status != kAudioHardwareNoError) {
            coreaudio_logerr (status, "Could not remove IOProc\n");
        }
@@ -657,7 +475,7 @@ static int coreaudio_ctl_out (HWVoiceOut *hw, int cmd, ...)
    case VOICE_ENABLE:
        /* start playback */
        if (!isPlaying(core->outputDeviceID)) {
-            status = AudioDeviceStart(core->outputDeviceID, core->ioprocid);
+            status = AudioDeviceStart(core->outputDeviceID, audioDeviceIOProc);
            if (status != kAudioHardwareNoError) {
                coreaudio_logerr (status, "Could not resume playback\n");
            }
@@ -666,10 +484,9 @@ static int coreaudio_ctl_out (HWVoiceOut *hw, int cmd, ...)

    case VOICE_DISABLE:
        /* stop playback */
-        if (!audio_is_cleaning_up()) {
+        if (!isAtexit) {
            if (isPlaying(core->outputDeviceID)) {
-                status = AudioDeviceStop(core->outputDeviceID,
-                                         core->ioprocid);
+                status = AudioDeviceStop(core->outputDeviceID, audioDeviceIOProc);
                if (status != kAudioHardwareNoError) {
                    coreaudio_logerr (status, "Could not pause playback\n");
                }
@@ -690,6 +507,7 @@ static void *coreaudio_audio_init (void)
    CoreaudioConf *conf = g_malloc(sizeof(CoreaudioConf));
    *conf = glob_conf;

+    atexit(coreaudio_atexit);
    return conf;
 }

@@ -26,7 +26,6 @@
 * SEAL 1.07 by Carlos 'pel' Hasan was used as documentation
 */

-#include "qemu/osdep.h"
 #include "qemu-common.h"
 #include "audio.h"

@@ -22,10 +22,7 @@
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
-#include "qemu/osdep.h"
 #include "qemu-common.h"
-#include "qemu/bswap.h"
-#include "qemu/error-report.h"
 #include "audio.h"

 #define AUDIO_CAP "mixeng"
@@ -268,42 +265,11 @@ f_sample *mixeng_clip[2][2][2][3] = {
    }
 };

-
-void audio_sample_to_uint64(void *samples, int pos,
-                            uint64_t *left, uint64_t *right)
-{
-    struct st_sample *sample = samples;
-    sample += pos;
-#ifdef FLOAT_MIXENG
-    error_report(
-        "Coreaudio and floating point samples are not supported by replay yet");
-    abort();
-#else
-    *left = sample->l;
-    *right = sample->r;
-#endif
-}
-
-void audio_sample_from_uint64(void *samples, int pos,
-                            uint64_t left, uint64_t right)
-{
-    struct st_sample *sample = samples;
-    sample += pos;
-#ifdef FLOAT_MIXENG
-    error_report(
-        "Coreaudio and floating point samples are not supported by replay yet");
-    abort();
-#else
-    sample->l = left;
-    sample->r = right;
-#endif
-}
-
 /*
 * August 21, 1998
 * Copyright 1998 Fabrice Bellard.
 *
- * [Rewrote completely the code of Lance Norskog And Sundry
+ * [Rewrote completly the code of Lance Norskog And Sundry
 * Contributors with a more efficient algorithm.]
 *
 * This source code is freely redistributable and may be used for
@@ -21,7 +21,6 @@
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
-
 #ifndef QEMU_MIXENG_H
 #define QEMU_MIXENG_H

@@ -49,4 +48,4 @@ void st_rate_stop (void *opaque);
 void mixeng_clear (struct st_sample *buf, int len);
 void mixeng_volume (struct st_sample *buf, int len, struct mixeng_volume *vol);

-#endif /* QEMU_MIXENG_H */
+#endif  /* mixeng.h */
@@ -21,9 +21,7 @@
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
-#include "qemu/osdep.h"
 #include "qemu-common.h"
-#include "qemu/host-utils.h"
 #include "audio.h"
 #include "qemu/timer.h"

@@ -50,8 +48,8 @@ static int no_run_out (HWVoiceOut *hw, int live)

    now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
    ticks = now - no->old_ticks;
-    bytes = muldiv64(ticks, hw->info.bytes_per_second, NANOSECONDS_PER_SECOND);
-    bytes = audio_MIN(bytes, INT_MAX);
+    bytes = muldiv64 (ticks, hw->info.bytes_per_second, get_ticks_per_sec ());
+    bytes = audio_MIN (bytes, INT_MAX);
    samples = bytes >> hw->info.shift;

    no->old_ticks = now;
@@ -62,7 +60,7 @@ static int no_run_out (HWVoiceOut *hw, int live)

 static int no_write (SWVoiceOut *sw, void *buf, int len)
 {
-    return audio_pcm_sw_write(sw, buf, len);
+    return audio_pcm_sw_write (sw, buf, len);
 }

 static int no_init_out(HWVoiceOut *hw, struct audsettings *as, void *drv_opaque)
@@ -107,7 +105,7 @@ static int no_run_in (HWVoiceIn *hw)
        int64_t now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
        int64_t ticks = now - no->old_ticks;
        int64_t bytes =
-            muldiv64(ticks, hw->info.bytes_per_second, NANOSECONDS_PER_SECOND);
+            muldiv64 (ticks, hw->info.bytes_per_second, get_ticks_per_sec ());

        no->old_ticks = now;
        bytes = audio_MIN (bytes, INT_MAX);
@@ -21,7 +21,9 @@
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
-#include "qemu/osdep.h"
+#include <stdlib.h>
+#include <sys/mman.h>
+#include <sys/types.h>
 #include <sys/ioctl.h>
 #include <sys/soundcard.h>
 #include "qemu-common.h"
@@ -897,7 +899,7 @@ static struct audio_option oss_options[] = {
        .name  = "EXCLUSIVE",
        .tag   = AUD_OPT_BOOL,
        .valp  = &glob_conf.exclusive,
-        .descr = "Open device in exclusive mode (vmix won't work)"
+        .descr = "Open device in exclusive mode (vmix wont work)"
    },
 #ifdef USE_DSP_POLICY
    {
@@ -1,5 +1,4 @@
 /* public domain */
-#include "qemu/osdep.h"
 #include "qemu-common.h"
 #include "audio.h"

@@ -781,22 +780,23 @@ static int qpa_ctl_in (HWVoiceIn *hw, int cmd, ...)

            pa_threaded_mainloop_lock (g->mainloop);

-            op = pa_context_set_source_output_volume (g->context,
-                pa_stream_get_index (pa->stream),
+            /* FIXME: use the upcoming "set_source_output_{volume,mute}" */
+            op = pa_context_set_source_volume_by_index (g->context,
+                pa_stream_get_device_index (pa->stream),
                &v, NULL, NULL);
            if (!op) {
                qpa_logerr (pa_context_errno (g->context),
-                            "set_source_output_volume() failed\n");
+                            "set_source_volume() failed\n");
            } else {
                pa_operation_unref(op);
            }

-            op = pa_context_set_source_output_mute (g->context,
+            op = pa_context_set_source_mute_by_index (g->context,
                pa_stream_get_index (pa->stream),
                sw->vol.mute, NULL, NULL);
            if (!op) {
                qpa_logerr (pa_context_errno (g->context),
-                            "set_source_output_mute() failed\n");
+                            "set_source_mute() failed\n");
            } else {
                pa_operation_unref (op);
            }
@@ -21,7 +21,6 @@
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
-#include "qemu/osdep.h"
 #include <SDL.h>
 #include <SDL_thread.h>
 #include "qemu-common.h"
@@ -38,14 +37,10 @@
 #define AUDIO_CAP "sdl"
 #include "audio_int.h"

-#define USE_SEMAPHORE (SDL_MAJOR_VERSION < 2)
-
 typedef struct SDLVoiceOut {
    HWVoiceOut hw;
    int live;
-#if USE_SEMAPHORE
    int rpos;
-#endif
    int decr;
 } SDLVoiceOut;

@@ -57,10 +52,8 @@ static struct {

 static struct SDLAudioState {
    int exit;
-#if USE_SEMAPHORE
    SDL_mutex *mutex;
    SDL_sem *sem;
-#endif
    int initialized;
    bool driver_created;
 } glob_sdl;
@@ -79,45 +72,31 @@ static void GCC_FMT_ATTR (1, 2) sdl_logerr (const char *fmt, ...)

 static int sdl_lock (SDLAudioState *s, const char *forfn)
 {
-#if USE_SEMAPHORE
    if (SDL_LockMutex (s->mutex)) {
        sdl_logerr ("SDL_LockMutex for %s failed\n", forfn);
        return -1;
    }
-#else
-    SDL_LockAudio();
-#endif
-
    return 0;
 }

 static int sdl_unlock (SDLAudioState *s, const char *forfn)
 {
-#if USE_SEMAPHORE
    if (SDL_UnlockMutex (s->mutex)) {
        sdl_logerr ("SDL_UnlockMutex for %s failed\n", forfn);
        return -1;
    }
-#else
-    SDL_UnlockAudio();
-#endif
-
    return 0;
 }

 static int sdl_post (SDLAudioState *s, const char *forfn)
 {
-#if USE_SEMAPHORE
    if (SDL_SemPost (s->sem)) {
        sdl_logerr ("SDL_SemPost for %s failed\n", forfn);
        return -1;
    }
-#endif
-
    return 0;
 }

-#if USE_SEMAPHORE
 static int sdl_wait (SDLAudioState *s, const char *forfn)
 {
    if (SDL_SemWait (s->sem)) {
@@ -126,7 +105,6 @@ static int sdl_wait (SDLAudioState *s, const char *forfn)
    }
    return 0;
 }
-#endif

 static int sdl_unlock_and_post (SDLAudioState *s, const char *forfn)
 {
@@ -267,7 +245,6 @@ static void sdl_callback (void *opaque, Uint8 *buf, int len)
        int to_mix, decr;

        /* dolog ("in callback samples=%d\n", samples); */
-#if USE_SEMAPHORE
        sdl_wait (s, "sdl_callback");
        if (s->exit) {
            return;
@@ -286,11 +263,6 @@ static void sdl_callback (void *opaque, Uint8 *buf, int len)
        if (!sdl->live) {
            goto again;
        }
-#else
-        if (s->exit || !sdl->live) {
-            break;
-        }
-#endif

        /* dolog ("in callback live=%d\n", live); */
        to_mix = audio_MIN (samples, sdl->live);
@@ -301,11 +273,7 @@ static void sdl_callback (void *opaque, Uint8 *buf, int len)

            /* dolog ("in callback to_mix %d, chunk %d\n", to_mix, chunk); */
            hw->clip (buf, src, chunk);
-#if USE_SEMAPHORE
            sdl->rpos = (sdl->rpos + chunk) % hw->samples;
-#else
-            hw->rpos = (hw->rpos + chunk) % hw->samples;
-#endif
            to_mix -= chunk;
            buf += chunk << hw->info.shift;
        }
@@ -313,21 +281,12 @@ static void sdl_callback (void *opaque, Uint8 *buf, int len)
        sdl->live -= decr;
        sdl->decr += decr;

-#if USE_SEMAPHORE
    again:
        if (sdl_unlock (s, "sdl_callback")) {
            return;
        }
-#endif
    }
    /* dolog ("done len=%d\n", len); */
-
-#if (SDL_MAJOR_VERSION >= 2)
-    /* SDL2 does not clear the remaining buffer for us, so do it on our own */
-    if (samples) {
-        memset(buf, 0, samples << hw->info.shift);
-    }
-#endif
 }

 static int sdl_write_out (SWVoiceOut *sw, void *buf, int len)
@@ -355,12 +314,8 @@ static int sdl_run_out (HWVoiceOut *hw, int live)
    decr = audio_MIN (sdl->decr, live);
    sdl->decr -= decr;

-#if USE_SEMAPHORE
    sdl->live = live - decr;
    hw->rpos = sdl->rpos;
-#else
-    sdl->live = live;
-#endif

    if (sdl->live > 0) {
        sdl_unlock_and_post (s, "sdl_run_out");
@@ -449,7 +404,6 @@ static void *sdl_audio_init (void)
        return NULL;
    }

-#if USE_SEMAPHORE
    s->mutex = SDL_CreateMutex ();
    if (!s->mutex) {
        sdl_logerr ("Failed to create SDL mutex\n");
@@ -464,7 +418,6 @@ static void *sdl_audio_init (void)
        SDL_QuitSubSystem (SDL_INIT_AUDIO);
        return NULL;
    }
-#endif

    s->driver_created = true;
    return s;
@@ -474,10 +427,8 @@ static void sdl_audio_fini (void *opaque)
 {
    SDLAudioState *s = opaque;
    sdl_close (s);
-#if USE_SEMAPHORE
    SDL_DestroySemaphore (s->sem);
    SDL_DestroyMutex (s->mutex);
-#endif
    SDL_QuitSubSystem (SDL_INIT_AUDIO);
    s->driver_created = false;
 }
@@ -17,9 +17,7 @@
 * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

-#include "qemu/osdep.h"
 #include "hw/hw.h"
-#include "qemu/host-utils.h"
 #include "qemu/error-report.h"
 #include "qemu/timer.h"
 #include "ui/qemu-spice.h"
@@ -105,11 +103,11 @@ static int rate_get_samples (struct audio_pcm_info *info, SpiceRateCtl *rate)

    now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
    ticks = now - rate->start_ticks;
-    bytes = muldiv64(ticks, info->bytes_per_second, NANOSECONDS_PER_SECOND);
+    bytes = muldiv64 (ticks, info->bytes_per_second, get_ticks_per_sec ());
    samples = (bytes - rate->bytes_sent) >> info->shift;
    if (samples < 0 || samples > 65536) {
        error_report("Resetting rate control (%" PRId64 " samples)", samples);
-        rate_start(rate);
+        rate_start (rate);
        samples = 0;
    }
    rate->bytes_sent += samples << info->shift;
@@ -1,17 +0,0 @@
-# See docs/tracing.txt for syntax documentation.
-
-# audio/alsaaudio.c
-alsa_revents(int revents) "revents = %d"
-alsa_pollout(int i, int fd) "i = %d fd = %d"
-alsa_set_handler(int events, int index, int fd, int err) "events=%#x index=%d fd=%d err=%d"
-alsa_wrote_zero(int len) "Failed to write %d frames (wrote zero)"
-alsa_read_zero(long len) "Failed to read %ld frames (read zero)"
-alsa_xrun_out(void) "Recovering from playback xrun"
-alsa_xrun_in(void) "Recovering from capture xrun"
-alsa_resume_out(void) "Resuming suspended output stream"
-alsa_resume_in(void) "Resuming suspended input stream"
-alsa_no_frames(int state) "No frames available and ALSA state is %d"
-
-# audio/ossaudio.c
-oss_version(int version) "OSS version = %#x"
-oss_invalid_available_size(int size, int bufsize) "Invalid available size, size=%d bufsize=%d"
@@ -21,8 +21,7 @@
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
-#include "qemu/osdep.h"
-#include "qemu/host-utils.h"
+#include "hw/hw.h"
 #include "qemu/timer.h"
 #include "audio.h"

@@ -51,7 +50,7 @@ static int wav_run_out (HWVoiceOut *hw, int live)
    int64_t now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
    int64_t ticks = now - wav->old_ticks;
    int64_t bytes =
-        muldiv64(ticks, hw->info.bytes_per_second, NANOSECONDS_PER_SECOND);
+        muldiv64 (ticks, hw->info.bytes_per_second, get_ticks_per_sec ());

    if (bytes > INT_MAX) {
        samples = INT_MAX >> hw->info.shift;
@@ -1,4 +1,3 @@
-#include "qemu/osdep.h"
 #include "hw/hw.h"
 #include "monitor/monitor.h"
 #include "qemu/error-report.h"
@@ -1,7 +1,7 @@
 common-obj-y += rng.o rng-egd.o
 common-obj-$(CONFIG_POSIX) += rng-random.o

-common-obj-y += msmouse.o wctablet.o testdev.o
+common-obj-y += msmouse.o testdev.o
 common-obj-$(CONFIG_BRLAPI) += baum.o
 baum.o-cflags := $(SDL_CFLAGS)

@@ -9,6 +9,3 @@ common-obj-$(CONFIG_TPM) += tpm.o

 common-obj-y += hostmem.o hostmem-ram.o
 common-obj-$(CONFIG_LINUX) += hostmem-file.o
-
-common-obj-y += cryptodev.o
-common-obj-y += cryptodev-builtin.o
@@ -1,7 +1,7 @@
 /*
 * QEMU Baum Braille Device
 *
- * Copyright (c) 2008, 2010-2011, 2016 Samuel Thibault
+ * Copyright (c) 2008 Samuel Thibault
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
@@ -21,16 +21,16 @@
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
-#include "qemu/osdep.h"
-#include "qapi/error.h"
 #include "qemu-common.h"
 #include "sysemu/char.h"
 #include "qemu/timer.h"
 #include "hw/usb.h"
-#include "ui/console.h"
 #include <brlapi.h>
 #include <brlapi_constants.h>
 #include <brlapi_keycodes.h>
+#ifdef CONFIG_SDL
+#include <SDL_syswm.h>
+#endif

 #if 0
 #define DPRINTF(fmt, ...) \
@@ -85,12 +85,11 @@
 #define BUF_SIZE 256

 typedef struct {
-    Chardev parent;
+    CharDriverState *chr;

    brlapi_handle_t *brlapi;
    int brlapi_fd;
    unsigned int x, y;
-    bool deferred_init;

    uint8_t in_buf[BUF_SIZE];
    uint8_t in_buf_used;
@@ -98,17 +97,11 @@ typedef struct {
    uint8_t out_buf_used, out_buf_ptr;

    QEMUTimer *cellCount_timer;
-} BaumChardev;
-
-#define TYPE_CHARDEV_BRAILLE "chardev-braille"
-#define BAUM_CHARDEV(obj) OBJECT_CHECK(BaumChardev, (obj), TYPE_CHARDEV_BRAILLE)
+} BaumDriverState;

 /* Let's assume NABCC by default */
-enum way {
-    DOTS2ASCII,
-    ASCII2DOTS
-};
-static const uint8_t nabcc_translation[2][256] = {
+static const uint8_t nabcc_translation[256] = {
+    [0] = ' ',
 #ifndef BRLAPI_DOTS
 #define BRLAPI_DOTS(d1,d2,d3,d4,d5,d6,d7,d8) \
    ((d1?BRLAPI_DOT1:0)|\
@@ -120,145 +113,111 @@ static const uint8_t nabcc_translation[2][256] = {
     (d7?BRLAPI_DOT7:0)|\
     (d8?BRLAPI_DOT8:0))
 #endif
-#define DO(dots, ascii) \
-    [DOTS2ASCII][dots] = ascii, \
-    [ASCII2DOTS][ascii] = dots
-    DO(0, ' '),
-    DO(BRLAPI_DOTS(1, 0, 0, 0, 0, 0, 0, 0), 'a'),
-    DO(BRLAPI_DOTS(1, 1, 0, 0, 0, 0, 0, 0), 'b'),
-    DO(BRLAPI_DOTS(1, 0, 0, 1, 0, 0, 0, 0), 'c'),
-    DO(BRLAPI_DOTS(1, 0, 0, 1, 1, 0, 0, 0), 'd'),
-    DO(BRLAPI_DOTS(1, 0, 0, 0, 1, 0, 0, 0), 'e'),
-    DO(BRLAPI_DOTS(1, 1, 0, 1, 0, 0, 0, 0), 'f'),
-    DO(BRLAPI_DOTS(1, 1, 0, 1, 1, 0, 0, 0), 'g'),
-    DO(BRLAPI_DOTS(1, 1, 0, 0, 1, 0, 0, 0), 'h'),
-    DO(BRLAPI_DOTS(0, 1, 0, 1, 0, 0, 0, 0), 'i'),
-    DO(BRLAPI_DOTS(0, 1, 0, 1, 1, 0, 0, 0), 'j'),
-    DO(BRLAPI_DOTS(1, 0, 1, 0, 0, 0, 0, 0), 'k'),
-    DO(BRLAPI_DOTS(1, 1, 1, 0, 0, 0, 0, 0), 'l'),
-    DO(BRLAPI_DOTS(1, 0, 1, 1, 0, 0, 0, 0), 'm'),
-    DO(BRLAPI_DOTS(1, 0, 1, 1, 1, 0, 0, 0), 'n'),
-    DO(BRLAPI_DOTS(1, 0, 1, 0, 1, 0, 0, 0), 'o'),
-    DO(BRLAPI_DOTS(1, 1, 1, 1, 0, 0, 0, 0), 'p'),
-    DO(BRLAPI_DOTS(1, 1, 1, 1, 1, 0, 0, 0), 'q'),
-    DO(BRLAPI_DOTS(1, 1, 1, 0, 1, 0, 0, 0), 'r'),
-    DO(BRLAPI_DOTS(0, 1, 1, 1, 0, 0, 0, 0), 's'),
-    DO(BRLAPI_DOTS(0, 1, 1, 1, 1, 0, 0, 0), 't'),
-    DO(BRLAPI_DOTS(1, 0, 1, 0, 0, 1, 0, 0), 'u'),
-    DO(BRLAPI_DOTS(1, 1, 1, 0, 0, 1, 0, 0), 'v'),
-    DO(BRLAPI_DOTS(0, 1, 0, 1, 1, 1, 0, 0), 'w'),
-    DO(BRLAPI_DOTS(1, 0, 1, 1, 0, 1, 0, 0), 'x'),
-    DO(BRLAPI_DOTS(1, 0, 1, 1, 1, 1, 0, 0), 'y'),
-    DO(BRLAPI_DOTS(1, 0, 1, 0, 1, 1, 0, 0), 'z'),
+    [BRLAPI_DOTS(1,0,0,0,0,0,0,0)] = 'a',
+    [BRLAPI_DOTS(1,1,0,0,0,0,0,0)] = 'b',
+    [BRLAPI_DOTS(1,0,0,1,0,0,0,0)] = 'c',
+    [BRLAPI_DOTS(1,0,0,1,1,0,0,0)] = 'd',
+    [BRLAPI_DOTS(1,0,0,0,1,0,0,0)] = 'e',
+    [BRLAPI_DOTS(1,1,0,1,0,0,0,0)] = 'f',
+    [BRLAPI_DOTS(1,1,0,1,1,0,0,0)] = 'g',
+    [BRLAPI_DOTS(1,1,0,0,1,0,0,0)] = 'h',
+    [BRLAPI_DOTS(0,1,0,1,0,0,0,0)] = 'i',
+    [BRLAPI_DOTS(0,1,0,1,1,0,0,0)] = 'j',
+    [BRLAPI_DOTS(1,0,1,0,0,0,0,0)] = 'k',
+    [BRLAPI_DOTS(1,1,1,0,0,0,0,0)] = 'l',
+    [BRLAPI_DOTS(1,0,1,1,0,0,0,0)] = 'm',
+    [BRLAPI_DOTS(1,0,1,1,1,0,0,0)] = 'n',
+    [BRLAPI_DOTS(1,0,1,0,1,0,0,0)] = 'o',
+    [BRLAPI_DOTS(1,1,1,1,0,0,0,0)] = 'p',
+    [BRLAPI_DOTS(1,1,1,1,1,0,0,0)] = 'q',
+    [BRLAPI_DOTS(1,1,1,0,1,0,0,0)] = 'r',
+    [BRLAPI_DOTS(0,1,1,1,0,0,0,0)] = 's',
+    [BRLAPI_DOTS(0,1,1,1,1,0,0,0)] = 't',
+    [BRLAPI_DOTS(1,0,1,0,0,1,0,0)] = 'u',
+    [BRLAPI_DOTS(1,1,1,0,0,1,0,0)] = 'v',
+    [BRLAPI_DOTS(0,1,0,1,1,1,0,0)] = 'w',
+    [BRLAPI_DOTS(1,0,1,1,0,1,0,0)] = 'x',
+    [BRLAPI_DOTS(1,0,1,1,1,1,0,0)] = 'y',
+    [BRLAPI_DOTS(1,0,1,0,1,1,0,0)] = 'z',

-    DO(BRLAPI_DOTS(1, 0, 0, 0, 0, 0, 1, 0), 'A'),
-    DO(BRLAPI_DOTS(1, 1, 0, 0, 0, 0, 1, 0), 'B'),
-    DO(BRLAPI_DOTS(1, 0, 0, 1, 0, 0, 1, 0), 'C'),
-    DO(BRLAPI_DOTS(1, 0, 0, 1, 1, 0, 1, 0), 'D'),
-    DO(BRLAPI_DOTS(1, 0, 0, 0, 1, 0, 1, 0), 'E'),
-    DO(BRLAPI_DOTS(1, 1, 0, 1, 0, 0, 1, 0), 'F'),
-    DO(BRLAPI_DOTS(1, 1, 0, 1, 1, 0, 1, 0), 'G'),
-    DO(BRLAPI_DOTS(1, 1, 0, 0, 1, 0, 1, 0), 'H'),
-    DO(BRLAPI_DOTS(0, 1, 0, 1, 0, 0, 1, 0), 'I'),
-    DO(BRLAPI_DOTS(0, 1, 0, 1, 1, 0, 1, 0), 'J'),
-    DO(BRLAPI_DOTS(1, 0, 1, 0, 0, 0, 1, 0), 'K'),
-    DO(BRLAPI_DOTS(1, 1, 1, 0, 0, 0, 1, 0), 'L'),
-    DO(BRLAPI_DOTS(1, 0, 1, 1, 0, 0, 1, 0), 'M'),
-    DO(BRLAPI_DOTS(1, 0, 1, 1, 1, 0, 1, 0), 'N'),
-    DO(BRLAPI_DOTS(1, 0, 1, 0, 1, 0, 1, 0), 'O'),
-    DO(BRLAPI_DOTS(1, 1, 1, 1, 0, 0, 1, 0), 'P'),
-    DO(BRLAPI_DOTS(1, 1, 1, 1, 1, 0, 1, 0), 'Q'),
-    DO(BRLAPI_DOTS(1, 1, 1, 0, 1, 0, 1, 0), 'R'),
-    DO(BRLAPI_DOTS(0, 1, 1, 1, 0, 0, 1, 0), 'S'),
-    DO(BRLAPI_DOTS(0, 1, 1, 1, 1, 0, 1, 0), 'T'),
-    DO(BRLAPI_DOTS(1, 0, 1, 0, 0, 1, 1, 0), 'U'),
-    DO(BRLAPI_DOTS(1, 1, 1, 0, 0, 1, 1, 0), 'V'),
-    DO(BRLAPI_DOTS(0, 1, 0, 1, 1, 1, 1, 0), 'W'),
-    DO(BRLAPI_DOTS(1, 0, 1, 1, 0, 1, 1, 0), 'X'),
-    DO(BRLAPI_DOTS(1, 0, 1, 1, 1, 1, 1, 0), 'Y'),
-    DO(BRLAPI_DOTS(1, 0, 1, 0, 1, 1, 1, 0), 'Z'),
+    [BRLAPI_DOTS(1,0,0,0,0,0,1,0)] = 'A',
+    [BRLAPI_DOTS(1,1,0,0,0,0,1,0)] = 'B',
+    [BRLAPI_DOTS(1,0,0,1,0,0,1,0)] = 'C',
+    [BRLAPI_DOTS(1,0,0,1,1,0,1,0)] = 'D',
+    [BRLAPI_DOTS(1,0,0,0,1,0,1,0)] = 'E',
+    [BRLAPI_DOTS(1,1,0,1,0,0,1,0)] = 'F',
+    [BRLAPI_DOTS(1,1,0,1,1,0,1,0)] = 'G',
+    [BRLAPI_DOTS(1,1,0,0,1,0,1,0)] = 'H',
+    [BRLAPI_DOTS(0,1,0,1,0,0,1,0)] = 'I',
+    [BRLAPI_DOTS(0,1,0,1,1,0,1,0)] = 'J',
+    [BRLAPI_DOTS(1,0,1,0,0,0,1,0)] = 'K',
+    [BRLAPI_DOTS(1,1,1,0,0,0,1,0)] = 'L',
+    [BRLAPI_DOTS(1,0,1,1,0,0,1,0)] = 'M',
+    [BRLAPI_DOTS(1,0,1,1,1,0,1,0)] = 'N',
+    [BRLAPI_DOTS(1,0,1,0,1,0,1,0)] = 'O',
+    [BRLAPI_DOTS(1,1,1,1,0,0,1,0)] = 'P',
+    [BRLAPI_DOTS(1,1,1,1,1,0,1,0)] = 'Q',
+    [BRLAPI_DOTS(1,1,1,0,1,0,1,0)] = 'R',
+    [BRLAPI_DOTS(0,1,1,1,0,0,1,0)] = 'S',
+    [BRLAPI_DOTS(0,1,1,1,1,0,1,0)] = 'T',
+    [BRLAPI_DOTS(1,0,1,0,0,1,1,0)] = 'U',
+    [BRLAPI_DOTS(1,1,1,0,0,1,1,0)] = 'V',
+    [BRLAPI_DOTS(0,1,0,1,1,1,1,0)] = 'W',
+    [BRLAPI_DOTS(1,0,1,1,0,1,1,0)] = 'X',
+    [BRLAPI_DOTS(1,0,1,1,1,1,1,0)] = 'Y',
+    [BRLAPI_DOTS(1,0,1,0,1,1,1,0)] = 'Z',

-    DO(BRLAPI_DOTS(0, 0, 1, 0, 1, 1, 0, 0), '0'),
-    DO(BRLAPI_DOTS(0, 1, 0, 0, 0, 0, 0, 0), '1'),
-    DO(BRLAPI_DOTS(0, 1, 1, 0, 0, 0, 0, 0), '2'),
-    DO(BRLAPI_DOTS(0, 1, 0, 0, 1, 0, 0, 0), '3'),
-    DO(BRLAPI_DOTS(0, 1, 0, 0, 1, 1, 0, 0), '4'),
-    DO(BRLAPI_DOTS(0, 1, 0, 0, 0, 1, 0, 0), '5'),
-    DO(BRLAPI_DOTS(0, 1, 1, 0, 1, 0, 0, 0), '6'),
-    DO(BRLAPI_DOTS(0, 1, 1, 0, 1, 1, 0, 0), '7'),
-    DO(BRLAPI_DOTS(0, 1, 1, 0, 0, 1, 0, 0), '8'),
-    DO(BRLAPI_DOTS(0, 0, 1, 0, 1, 0, 0, 0), '9'),
+    [BRLAPI_DOTS(0,0,1,0,1,1,0,0)] = '0',
+    [BRLAPI_DOTS(0,1,0,0,0,0,0,0)] = '1',
+    [BRLAPI_DOTS(0,1,1,0,0,0,0,0)] = '2',
+    [BRLAPI_DOTS(0,1,0,0,1,0,0,0)] = '3',
+    [BRLAPI_DOTS(0,1,0,0,1,1,0,0)] = '4',
+    [BRLAPI_DOTS(0,1,0,0,0,1,0,0)] = '5',
+    [BRLAPI_DOTS(0,1,1,0,1,0,0,0)] = '6',
+    [BRLAPI_DOTS(0,1,1,0,1,1,0,0)] = '7',
+    [BRLAPI_DOTS(0,1,1,0,0,1,0,0)] = '8',
+    [BRLAPI_DOTS(0,0,1,0,1,0,0,0)] = '9',

-    DO(BRLAPI_DOTS(0, 0, 0, 1, 0, 1, 0, 0), '.'),
-    DO(BRLAPI_DOTS(0, 0, 1, 1, 0, 1, 0, 0), '+'),
-    DO(BRLAPI_DOTS(0, 0, 1, 0, 0, 1, 0, 0), '-'),
-    DO(BRLAPI_DOTS(1, 0, 0, 0, 0, 1, 0, 0), '*'),
-    DO(BRLAPI_DOTS(0, 0, 1, 1, 0, 0, 0, 0), '/'),
-    DO(BRLAPI_DOTS(1, 1, 1, 0, 1, 1, 0, 0), '('),
-    DO(BRLAPI_DOTS(0, 1, 1, 1, 1, 1, 0, 0), ')'),
+    [BRLAPI_DOTS(0,0,0,1,0,1,0,0)] = '.',
+    [BRLAPI_DOTS(0,0,1,1,0,1,0,0)] = '+',
+    [BRLAPI_DOTS(0,0,1,0,0,1,0,0)] = '-',
+    [BRLAPI_DOTS(1,0,0,0,0,1,0,0)] = '*',
+    [BRLAPI_DOTS(0,0,1,1,0,0,0,0)] = '/',
+    [BRLAPI_DOTS(1,1,1,0,1,1,0,0)] = '(',
+    [BRLAPI_DOTS(0,1,1,1,1,1,0,0)] = ')',

-    DO(BRLAPI_DOTS(1, 1, 1, 1, 0, 1, 0, 0), '&'),
-    DO(BRLAPI_DOTS(0, 0, 1, 1, 1, 1, 0, 0), '#'),
+    [BRLAPI_DOTS(1,1,1,1,0,1,0,0)] = '&',
+    [BRLAPI_DOTS(0,0,1,1,1,1,0,0)] = '#',

-    DO(BRLAPI_DOTS(0, 0, 0, 0, 0, 1, 0, 0), ','),
-    DO(BRLAPI_DOTS(0, 0, 0, 0, 1, 1, 0, 0), ';'),
-    DO(BRLAPI_DOTS(1, 0, 0, 0, 1, 1, 0, 0), ':'),
-    DO(BRLAPI_DOTS(0, 1, 1, 1, 0, 1, 0, 0), '!'),
-    DO(BRLAPI_DOTS(1, 0, 0, 1, 1, 1, 0, 0), '?'),
-    DO(BRLAPI_DOTS(0, 0, 0, 0, 1, 0, 0, 0), '"'),
-    DO(BRLAPI_DOTS(0, 0, 1, 0, 0, 0, 0, 0), '\''),
-    DO(BRLAPI_DOTS(0, 0, 0, 1, 0, 0, 0, 0), '`'),
-    DO(BRLAPI_DOTS(0, 0, 0, 1, 1, 0, 1, 0), '^'),
-    DO(BRLAPI_DOTS(0, 0, 0, 1, 1, 0, 0, 0), '~'),
-    DO(BRLAPI_DOTS(0, 1, 0, 1, 0, 1, 1, 0), '['),
-    DO(BRLAPI_DOTS(1, 1, 0, 1, 1, 1, 1, 0), ']'),
-    DO(BRLAPI_DOTS(0, 1, 0, 1, 0, 1, 0, 0), '{'),
-    DO(BRLAPI_DOTS(1, 1, 0, 1, 1, 1, 0, 0), '}'),
-    DO(BRLAPI_DOTS(1, 1, 1, 1, 1, 1, 0, 0), '='),
-    DO(BRLAPI_DOTS(1, 1, 0, 0, 0, 1, 0, 0), '<'),
-    DO(BRLAPI_DOTS(0, 0, 1, 1, 1, 0, 0, 0), '>'),
-    DO(BRLAPI_DOTS(1, 1, 0, 1, 0, 1, 0, 0), '$'),
-    DO(BRLAPI_DOTS(1, 0, 0, 1, 0, 1, 0, 0), '%'),
-    DO(BRLAPI_DOTS(0, 0, 0, 1, 0, 0, 1, 0), '@'),
-    DO(BRLAPI_DOTS(1, 1, 0, 0, 1, 1, 0, 0), '|'),
-    DO(BRLAPI_DOTS(1, 1, 0, 0, 1, 1, 1, 0), '\\'),
-    DO(BRLAPI_DOTS(0, 0, 0, 1, 1, 1, 0, 0), '_'),
+    [BRLAPI_DOTS(0,0,0,0,0,1,0,0)] = ',',
+    [BRLAPI_DOTS(0,0,0,0,1,1,0,0)] = ';',
+    [BRLAPI_DOTS(1,0,0,0,1,1,0,0)] = ':',
+    [BRLAPI_DOTS(0,1,1,1,0,1,0,0)] = '!',
+    [BRLAPI_DOTS(1,0,0,1,1,1,0,0)] = '?',
+    [BRLAPI_DOTS(0,0,0,0,1,0,0,0)] = '"',
+    [BRLAPI_DOTS(0,0,1,0,0,0,0,0)] ='\'',
+    [BRLAPI_DOTS(0,0,0,1,0,0,0,0)] = '`',
+    [BRLAPI_DOTS(0,0,0,1,1,0,1,0)] = '^',
+    [BRLAPI_DOTS(0,0,0,1,1,0,0,0)] = '~',
+    [BRLAPI_DOTS(0,1,0,1,0,1,1,0)] = '[',
+    [BRLAPI_DOTS(1,1,0,1,1,1,1,0)] = ']',
+    [BRLAPI_DOTS(0,1,0,1,0,1,0,0)] = '{',
+    [BRLAPI_DOTS(1,1,0,1,1,1,0,0)] = '}',
+    [BRLAPI_DOTS(1,1,1,1,1,1,0,0)] = '=',
+    [BRLAPI_DOTS(1,1,0,0,0,1,0,0)] = '<',
+    [BRLAPI_DOTS(0,0,1,1,1,0,0,0)] = '>',
+    [BRLAPI_DOTS(1,1,0,1,0,1,0,0)] = '$',
+    [BRLAPI_DOTS(1,0,0,1,0,1,0,0)] = '%',
+    [BRLAPI_DOTS(0,0,0,1,0,0,1,0)] = '@',
+    [BRLAPI_DOTS(1,1,0,0,1,1,0,0)] = '|',
+    [BRLAPI_DOTS(1,1,0,0,1,1,1,0)] ='\\',
+    [BRLAPI_DOTS(0,0,0,1,1,1,0,0)] = '_',
 };

-/* The guest OS has started discussing with us, finish initializing BrlAPI */
-static int baum_deferred_init(BaumChardev *baum)
-{
-    int tty = BRLAPI_TTY_DEFAULT;
-    QemuConsole *con;
-
-    if (baum->deferred_init) {
-        return 1;
-    }
-
-    if (brlapi__getDisplaySize(baum->brlapi, &baum->x, &baum->y) == -1) {
-        brlapi_perror("baum: brlapi__getDisplaySize");
-        return 0;
-    }
-
-    con = qemu_console_lookup_by_index(0);
-    if (con && qemu_console_is_graphic(con)) {
-        tty = qemu_console_get_window_id(con);
-        if (tty == -1)
-            tty = BRLAPI_TTY_DEFAULT;
-    }
-
-    if (brlapi__enterTtyMode(baum->brlapi, tty, NULL) == -1) {
-        brlapi_perror("baum: brlapi__enterTtyMode");
-        return 0;
-    }
-    baum->deferred_init = 1;
-    return 1;
-}
-
 /* The serial port can receive more of our data */
-static void baum_chr_accept_input(struct Chardev *chr)
+static void baum_accept_input(struct CharDriverState *chr)
 {
-    BaumChardev *baum = BAUM_CHARDEV(chr);
+    BaumDriverState *baum = chr->opaque;
    int room, first;

    if (!baum->out_buf_used)
@@ -282,25 +241,24 @@ static void baum_chr_accept_input(struct Chardev *chr)
 }

 /* We want to send a packet */
-static void baum_write_packet(BaumChardev *baum, const uint8_t *buf, int len)
+static void baum_write_packet(BaumDriverState *baum, const uint8_t *buf, int len)
 {
-    Chardev *chr = CHARDEV(baum);
    uint8_t io_buf[1 + 2 * len], *cur = io_buf;
    int room;
    *cur++ = ESC;
    while (len--)
        if ((*cur++ = *buf++) == ESC)
            *cur++ = ESC;
-    room = qemu_chr_be_can_write(chr);
+    room = qemu_chr_be_can_write(baum->chr);
    len = cur - io_buf;
    if (len <= room) {
        /* Fits */
-        qemu_chr_be_write(chr, io_buf, len);
+        qemu_chr_be_write(baum->chr, io_buf, len);
    } else {
        int first;
        uint8_t out;
        /* Can't fit all, send what can be, and store the rest. */
-        qemu_chr_be_write(chr, io_buf, room);
+        qemu_chr_be_write(baum->chr, io_buf, room);
        len -= room;
        cur = io_buf + room;
        if (len > BUF_SIZE - baum->out_buf_used) {
@@ -325,14 +283,14 @@ static void baum_write_packet(BaumChardev *baum, const uint8_t *buf, int len)
 /* Called when the other end seems to have a wrong idea of our display size */
 static void baum_cellCount_timer_cb(void *opaque)
 {
-    BaumChardev *baum = BAUM_CHARDEV(opaque);
+    BaumDriverState *baum = opaque;
    uint8_t cell_count[] = { BAUM_RSP_CellCount, baum->x * baum->y };
    DPRINTF("Timeout waiting for DisplayData, sending cell count\n");
    baum_write_packet(baum, cell_count, sizeof(cell_count));
 }

 /* Try to interpret a whole incoming packet */
-static int baum_eat_packet(BaumChardev *baum, const uint8_t *buf, int len)
+static int baum_eat_packet(BaumDriverState *baum, const uint8_t *buf, int len)
 {
    const uint8_t *cur = buf;
    uint8_t req = 0;
@@ -345,7 +303,7 @@ static int baum_eat_packet(BaumChardev *baum, const uint8_t *buf, int len)
                return 0;
            cur++;
        }
-        DPRINTF("Dropped %td bytes!\n", cur - buf);
+        DPRINTF("Dropped %d bytes!\n", cur - buf);
    }

 #define EAT(c) do {\
@@ -377,7 +335,7 @@ static int baum_eat_packet(BaumChardev *baum, const uint8_t *buf, int len)

        /* Allow 100ms to complete the DisplayData packet */
        timer_mod(baum->cellCount_timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) +
-                       NANOSECONDS_PER_SECOND / 10);
+                       get_ticks_per_sec() / 10);
        for (i = 0; i < baum->x * baum->y ; i++) {
            EAT(c);
            cells[i] = c;
@@ -386,10 +344,8 @@ static int baum_eat_packet(BaumChardev *baum, const uint8_t *buf, int len)
                cursor = i + 1;
                c &= ~(BRLAPI_DOT7|BRLAPI_DOT8);
            }
-            c = nabcc_translation[DOTS2ASCII][c];
-            if (!c) {
+            if (!(c = nabcc_translation[c]))
                c = '?';
-            }
            text[i] = c;
        }
        timer_del(baum->cellCount_timer);
@@ -473,17 +429,15 @@ static int baum_eat_packet(BaumChardev *baum, const uint8_t *buf, int len)
 }

 /* The other end is writing some data.  Store it and try to interpret */
-static int baum_chr_write(Chardev *chr, const uint8_t *buf, int len)
+static int baum_write(CharDriverState *chr, const uint8_t *buf, int len)
 {
-    BaumChardev *baum = BAUM_CHARDEV(chr);
+    BaumDriverState *baum = chr->opaque;
    int tocopy, cur, eaten, orig_len = len;

    if (!len)
        return 0;
    if (!baum->brlapi)
        return len;
-    if (!baum_deferred_init(baum))
-        return len;

    while (len) {
        /* Complete our buffer as much as possible */
@@ -514,31 +468,20 @@ static int baum_chr_write(Chardev *chr, const uint8_t *buf, int len)
 }

 /* Send the key code to the other end */
-static void baum_send_key(BaumChardev *baum, uint8_t type, uint8_t value)
-{
+static void baum_send_key(BaumDriverState *baum, uint8_t type, uint8_t value) {
    uint8_t packet[] = { type, value };
    DPRINTF("writing key %x %x\n", type, value);
    baum_write_packet(baum, packet, sizeof(packet));
 }

-static void baum_send_key2(BaumChardev *baum, uint8_t type, uint8_t value,
-                           uint8_t value2)
-{
-    uint8_t packet[] = { type, value, value2 };
-    DPRINTF("writing key %x %x\n", type, value);
-    baum_write_packet(baum, packet, sizeof(packet));
-}
-
 /* We got some data on the BrlAPI socket */
 static void baum_chr_read(void *opaque)
 {
-    BaumChardev *baum = BAUM_CHARDEV(opaque);
+    BaumDriverState *baum = opaque;
    brlapi_keyCode_t code;
    int ret;
    if (!baum->brlapi)
        return;
-    if (!baum_deferred_init(baum))
-        return;
    while ((ret = brlapi__readKey(baum->brlapi, 0, &code)) == 1) {
        DPRINTF("got key %"BRLAPI_PRIxKEYCODE"\n", code);
        /* Emulate */
@@ -595,17 +538,7 @@ static void baum_chr_read(void *opaque)
            }
            break;
        case BRLAPI_KEY_TYPE_SYM:
-            {
-                brlapi_keyCode_t keysym = code & BRLAPI_KEY_CODE_MASK;
-                if (keysym < 0x100) {
-                    uint8_t dots = nabcc_translation[ASCII2DOTS][keysym];
-                    if (dots) {
-                        baum_send_key2(baum, BAUM_RSP_EntryKeys, 0, dots);
-                        baum_send_key2(baum, BAUM_RSP_EntryKeys, 0, 0);
-                    }
-                }
-                break;
-            }
+            break;
        }
    }
    if (ret == -1 && (brlapi_errno != BRLAPI_ERROR_LIBCERR || errno != EINTR)) {
@@ -616,62 +549,87 @@ static void baum_chr_read(void *opaque)
    }
 }

-static void char_braille_finalize(Object *obj)
+static void baum_close(struct CharDriverState *chr)
 {
-    BaumChardev *baum = BAUM_CHARDEV(obj);
+    BaumDriverState *baum = chr->opaque;

    timer_free(baum->cellCount_timer);
    if (baum->brlapi) {
        brlapi__closeConnection(baum->brlapi);
        g_free(baum->brlapi);
    }
+    g_free(baum);
 }

-static void baum_chr_open(Chardev *chr,
-                          ChardevBackend *backend,
-                          bool *be_opened,
-                          Error **errp)
+CharDriverState *chr_baum_init(void)
 {
-    BaumChardev *baum = BAUM_CHARDEV(chr);
+    BaumDriverState *baum;
+    CharDriverState *chr;
    brlapi_handle_t *handle;
+#if defined(CONFIG_SDL)
+#if SDL_COMPILEDVERSION < SDL_VERSIONNUM(2, 0, 0)
+    SDL_SysWMinfo info;
+#endif
+#endif
+    int tty;
+
+    baum = g_malloc0(sizeof(BaumDriverState));
+    baum->chr = chr = qemu_chr_alloc();
+
+    chr->opaque = baum;
+    chr->chr_write = baum_write;
+    chr->chr_accept_input = baum_accept_input;
+    chr->chr_close = baum_close;

    handle = g_malloc0(brlapi_getHandleSize());
    baum->brlapi = handle;

    baum->brlapi_fd = brlapi__openConnection(handle, NULL, NULL);
    if (baum->brlapi_fd == -1) {
-        error_setg(errp, "brlapi__openConnection: %s",
-                   brlapi_strerror(brlapi_error_location()));
-        g_free(handle);
-        return;
+        brlapi_perror("baum_init: brlapi_openConnection");
+        goto fail_handle;
    }
-    baum->deferred_init = 0;

    baum->cellCount_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, baum_cellCount_timer_cb, baum);

+    if (brlapi__getDisplaySize(handle, &baum->x, &baum->y) == -1) {
+        brlapi_perror("baum_init: brlapi_getDisplaySize");
+        goto fail;
+    }
+
+#if defined(CONFIG_SDL)
+#if SDL_COMPILEDVERSION < SDL_VERSIONNUM(2, 0, 0)
+    memset(&info, 0, sizeof(info));
+    SDL_VERSION(&info.version);
+    if (SDL_GetWMInfo(&info))
+        tty = info.info.x11.wmwindow;
+    else
+#endif
+#endif
+        tty = BRLAPI_TTY_DEFAULT;
+
+    if (brlapi__enterTtyMode(handle, tty, NULL) == -1) {
+        brlapi_perror("baum_init: brlapi_enterTtyMode");
+        goto fail;
+    }
+
    qemu_set_fd_handler(baum->brlapi_fd, baum_chr_read, NULL, baum);
+
+    return chr;
+
+fail:
+    timer_free(baum->cellCount_timer);
+    brlapi__closeConnection(handle);
+fail_handle:
+    g_free(handle);
+    g_free(chr);
+    g_free(baum);
+    return NULL;
 }

-static void char_braille_class_init(ObjectClass *oc, void *data)
-{
-    ChardevClass *cc = CHARDEV_CLASS(oc);
-
-    cc->open = baum_chr_open;
-    cc->chr_write = baum_chr_write;
-    cc->chr_accept_input = baum_chr_accept_input;
-}
-
-static const TypeInfo char_braille_type_info = {
-    .name = TYPE_CHARDEV_BRAILLE,
-    .parent = TYPE_CHARDEV,
-    .instance_size = sizeof(BaumChardev),
-    .instance_finalize = char_braille_finalize,
-    .class_init = char_braille_class_init,
-};
-
 static void register_types(void)
 {
-    type_register_static(&char_braille_type_info);
+    register_char_driver("braille", CHARDEV_BACKEND_KIND_BRAILLE, NULL);
 }

 type_init(register_types);
@@ -1,400 +0,0 @@
-/*
- * QEMU Cryptodev backend for QEMU cipher APIs
- *
- * Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD.
- *
- * Authors:
- *    Gonglei <arei.gonglei@huawei.com>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, see <http://www.gnu.org/licenses/>.
- *
- */
-
-#include "qemu/osdep.h"
-#include "sysemu/cryptodev.h"
-#include "hw/boards.h"
-#include "qapi/error.h"
-#include "standard-headers/linux/virtio_crypto.h"
-#include "crypto/cipher.h"
-
-
-/**
- * @TYPE_CRYPTODEV_BACKEND_BUILTIN:
- * name of backend that uses QEMU cipher API
- */
-#define TYPE_CRYPTODEV_BACKEND_BUILTIN "cryptodev-backend-builtin"
-
-#define CRYPTODEV_BACKEND_BUILTIN(obj) \
-    OBJECT_CHECK(CryptoDevBackendBuiltin, \
-                 (obj), TYPE_CRYPTODEV_BACKEND_BUILTIN)
-
-typedef struct CryptoDevBackendBuiltin
-                         CryptoDevBackendBuiltin;
-
-typedef struct CryptoDevBackendBuiltinSession {
-    QCryptoCipher *cipher;
-    uint8_t direction; /* encryption or decryption */
-    uint8_t type; /* cipher? hash? aead? */
-    QTAILQ_ENTRY(CryptoDevBackendBuiltinSession) next;
-} CryptoDevBackendBuiltinSession;
-
-/* Max number of symmetric sessions */
-#define MAX_NUM_SESSIONS 256
-
-#define CRYPTODEV_BUITLIN_MAX_AUTH_KEY_LEN    512
-#define CRYPTODEV_BUITLIN_MAX_CIPHER_KEY_LEN  64
-
-struct CryptoDevBackendBuiltin {
-    CryptoDevBackend parent_obj;
-
-    CryptoDevBackendBuiltinSession *sessions[MAX_NUM_SESSIONS];
-};
-
-static void cryptodev_builtin_init(
-             CryptoDevBackend *backend, Error **errp)
-{
-    /* Only support one queue */
-    int queues = backend->conf.peers.queues;
-    CryptoDevBackendClient *cc;
-
-    if (queues != 1) {
-        error_setg(errp,
-                  "Only support one queue in cryptdov-builtin backend");
-        return;
-    }
-
-    cc = cryptodev_backend_new_client(
-              "cryptodev-builtin", NULL);
-    cc->info_str = g_strdup_printf("cryptodev-builtin0");
-    cc->queue_index = 0;
-    backend->conf.peers.ccs[0] = cc;
-
-    backend->conf.crypto_services =
-                         1u << VIRTIO_CRYPTO_SERVICE_CIPHER |
-                         1u << VIRTIO_CRYPTO_SERVICE_HASH |
-                         1u << VIRTIO_CRYPTO_SERVICE_MAC;
-    backend->conf.cipher_algo_l = 1u << VIRTIO_CRYPTO_CIPHER_AES_CBC;
-    backend->conf.hash_algo = 1u << VIRTIO_CRYPTO_HASH_SHA1;
-    /*
-     * Set the Maximum length of crypto request.
-     * Why this value? Just avoid to overflow when
-     * memory allocation for each crypto request.
-     */
-    backend->conf.max_size = LONG_MAX - sizeof(CryptoDevBackendSymOpInfo);
-    backend->conf.max_cipher_key_len = CRYPTODEV_BUITLIN_MAX_CIPHER_KEY_LEN;
-    backend->conf.max_auth_key_len = CRYPTODEV_BUITLIN_MAX_AUTH_KEY_LEN;
-
-    cryptodev_backend_set_ready(backend, true);
-}
-
-static int
-cryptodev_builtin_get_unused_session_index(
-                 CryptoDevBackendBuiltin *builtin)
-{
-    size_t i;
-
-    for (i = 0; i < MAX_NUM_SESSIONS; i++) {
-        if (builtin->sessions[i] == NULL) {
-            return i;
-        }
-    }
-
-    return -1;
-}
-
-#define AES_KEYSIZE_128 16
-#define AES_KEYSIZE_192 24
-#define AES_KEYSIZE_256 32
-#define AES_KEYSIZE_128_XTS AES_KEYSIZE_256
-#define AES_KEYSIZE_256_XTS 64
-
-static int
-cryptodev_builtin_get_aes_algo(uint32_t key_len, int mode, Error **errp)
-{
-    int algo;
-
-    if (key_len == AES_KEYSIZE_128) {
-        algo = QCRYPTO_CIPHER_ALG_AES_128;
-    } else if (key_len == AES_KEYSIZE_192) {
-        algo = QCRYPTO_CIPHER_ALG_AES_192;
-    } else if (key_len == AES_KEYSIZE_256) { /* equals AES_KEYSIZE_128_XTS */
-        if (mode == QCRYPTO_CIPHER_MODE_XTS) {
-            algo = QCRYPTO_CIPHER_ALG_AES_128;
-        } else {
-            algo = QCRYPTO_CIPHER_ALG_AES_256;
-        }
-    } else if (key_len == AES_KEYSIZE_256_XTS) {
-        if (mode == QCRYPTO_CIPHER_MODE_XTS) {
-            algo = QCRYPTO_CIPHER_ALG_AES_256;
-        } else {
-            goto err;
-        }
-    } else {
-        goto err;
-    }
-
-    return algo;
-
-err:
-   error_setg(errp, "Unsupported key length :%u", key_len);
-   return -1;
-}
-
-static int cryptodev_builtin_create_cipher_session(
-                    CryptoDevBackendBuiltin *builtin,
-                    CryptoDevBackendSymSessionInfo *sess_info,
-                    Error **errp)
-{
-    int algo;
-    int mode;
-    QCryptoCipher *cipher;
-    int index;
-    CryptoDevBackendBuiltinSession *sess;
-
-    if (sess_info->op_type != VIRTIO_CRYPTO_SYM_OP_CIPHER) {
-        error_setg(errp, "Unsupported optype :%u", sess_info->op_type);
-        return -1;
-    }
-
-    index = cryptodev_builtin_get_unused_session_index(builtin);
-    if (index < 0) {
-        error_setg(errp, "Total number of sessions created exceeds %u",
-                  MAX_NUM_SESSIONS);
-        return -1;
-    }
-
-    switch (sess_info->cipher_alg) {
-    case VIRTIO_CRYPTO_CIPHER_AES_ECB:
-        mode = QCRYPTO_CIPHER_MODE_ECB;
-        algo = cryptodev_builtin_get_aes_algo(sess_info->key_len,
-                                                    mode, errp);
-        if (algo < 0)  {
-            return -1;
-        }
-        break;
-    case VIRTIO_CRYPTO_CIPHER_AES_CBC:
-        mode = QCRYPTO_CIPHER_MODE_CBC;
-        algo = cryptodev_builtin_get_aes_algo(sess_info->key_len,
-                                                    mode, errp);
-        if (algo < 0)  {
-            return -1;
-        }
-        break;
-    case VIRTIO_CRYPTO_CIPHER_AES_CTR:
-        mode = QCRYPTO_CIPHER_MODE_CTR;
-        algo = cryptodev_builtin_get_aes_algo(sess_info->key_len,
-                                                    mode, errp);
-        if (algo < 0)  {
-            return -1;
-        }
-        break;
-    case VIRTIO_CRYPTO_CIPHER_AES_XTS:
-        mode = QCRYPTO_CIPHER_MODE_XTS;
-        algo = cryptodev_builtin_get_aes_algo(sess_info->key_len,
-                                                    mode, errp);
-        if (algo < 0)  {
-            return -1;
-        }
-        break;
-    case VIRTIO_CRYPTO_CIPHER_3DES_ECB:
-        mode = QCRYPTO_CIPHER_MODE_ECB;
-        algo = QCRYPTO_CIPHER_ALG_3DES;
-        break;
-    case VIRTIO_CRYPTO_CIPHER_3DES_CBC:
-        mode = QCRYPTO_CIPHER_MODE_CBC;
-        algo = QCRYPTO_CIPHER_ALG_3DES;
-        break;
-    case VIRTIO_CRYPTO_CIPHER_3DES_CTR:
-        mode = QCRYPTO_CIPHER_MODE_CTR;
-        algo = QCRYPTO_CIPHER_ALG_3DES;
-        break;
-    default:
-        error_setg(errp, "Unsupported cipher alg :%u",
-                   sess_info->cipher_alg);
-        return -1;
-    }
-
-    cipher = qcrypto_cipher_new(algo, mode,
-                               sess_info->cipher_key,
-                               sess_info->key_len,
-                               errp);
-    if (!cipher) {
-        return -1;
-    }
-
-    sess = g_new0(CryptoDevBackendBuiltinSession, 1);
-    sess->cipher = cipher;
-    sess->direction = sess_info->direction;
-    sess->type = sess_info->op_type;
-
-    builtin->sessions[index] = sess;
-
-    return index;
-}
-
-static int64_t cryptodev_builtin_sym_create_session(
-           CryptoDevBackend *backend,
-           CryptoDevBackendSymSessionInfo *sess_info,
-           uint32_t queue_index, Error **errp)
-{
-    CryptoDevBackendBuiltin *builtin =
-                      CRYPTODEV_BACKEND_BUILTIN(backend);
-    int64_t session_id = -1;
-    int ret;
-
-    switch (sess_info->op_code) {
-    case VIRTIO_CRYPTO_CIPHER_CREATE_SESSION:
-        ret = cryptodev_builtin_create_cipher_session(
-                           builtin, sess_info, errp);
-        if (ret < 0) {
-            return ret;
-        } else {
-            session_id = ret;
-        }
-        break;
-    case VIRTIO_CRYPTO_HASH_CREATE_SESSION:
-    case VIRTIO_CRYPTO_MAC_CREATE_SESSION:
-    default:
-        error_setg(errp, "Unsupported opcode :%" PRIu32 "",
-                   sess_info->op_code);
-        return -1;
-    }
-
-    return session_id;
-}
-
-static int cryptodev_builtin_sym_close_session(
-           CryptoDevBackend *backend,
-           uint64_t session_id,
-           uint32_t queue_index, Error **errp)
-{
-    CryptoDevBackendBuiltin *builtin =
-                      CRYPTODEV_BACKEND_BUILTIN(backend);
-
-    if (session_id >= MAX_NUM_SESSIONS ||
-              builtin->sessions[session_id] == NULL) {
-        error_setg(errp, "Cannot find a valid session id: %" PRIu64 "",
-                      session_id);
-        return -1;
-    }
-
-    qcrypto_cipher_free(builtin->sessions[session_id]->cipher);
-    g_free(builtin->sessions[session_id]);
-    builtin->sessions[session_id] = NULL;
-    return 0;
-}
-
-static int cryptodev_builtin_sym_operation(
-                 CryptoDevBackend *backend,
-                 CryptoDevBackendSymOpInfo *op_info,
-                 uint32_t queue_index, Error **errp)
-{
-    CryptoDevBackendBuiltin *builtin =
-                      CRYPTODEV_BACKEND_BUILTIN(backend);
-    CryptoDevBackendBuiltinSession *sess;
-    int ret;
-
-    if (op_info->session_id >= MAX_NUM_SESSIONS ||
-              builtin->sessions[op_info->session_id] == NULL) {
-        error_setg(errp, "Cannot find a valid session id: %" PRIu64 "",
-                   op_info->session_id);
-        return -VIRTIO_CRYPTO_INVSESS;
-    }
-
-    if (op_info->op_type == VIRTIO_CRYPTO_SYM_OP_ALGORITHM_CHAINING) {
-        error_setg(errp,
-               "Algorithm chain is unsupported for cryptdoev-builtin");
-        return -VIRTIO_CRYPTO_NOTSUPP;
-    }
-
-    sess = builtin->sessions[op_info->session_id];
-
-    if (op_info->iv_len > 0) {
-        ret = qcrypto_cipher_setiv(sess->cipher, op_info->iv,
-                                   op_info->iv_len, errp);
-        if (ret < 0) {
-            return -VIRTIO_CRYPTO_ERR;
-        }
-    }
-
-    if (sess->direction == VIRTIO_CRYPTO_OP_ENCRYPT) {
-        ret = qcrypto_cipher_encrypt(sess->cipher, op_info->src,
-                                     op_info->dst, op_info->src_len, errp);
-        if (ret < 0) {
-            return -VIRTIO_CRYPTO_ERR;
-        }
-    } else {
-        ret = qcrypto_cipher_decrypt(sess->cipher, op_info->src,
-                                     op_info->dst, op_info->src_len, errp);
-        if (ret < 0) {
-            return -VIRTIO_CRYPTO_ERR;
-        }
-    }
-    return VIRTIO_CRYPTO_OK;
-}
-
-static void cryptodev_builtin_cleanup(
-             CryptoDevBackend *backend,
-             Error **errp)
-{
-    CryptoDevBackendBuiltin *builtin =
-                      CRYPTODEV_BACKEND_BUILTIN(backend);
-    size_t i;
-    int queues = backend->conf.peers.queues;
-    CryptoDevBackendClient *cc;
-
-    for (i = 0; i < MAX_NUM_SESSIONS; i++) {
-        if (builtin->sessions[i] != NULL) {
-            cryptodev_builtin_sym_close_session(
-                    backend, i, 0, errp);
-        }
-    }
-
-    for (i = 0; i < queues; i++) {
-        cc = backend->conf.peers.ccs[i];
-        if (cc) {
-            cryptodev_backend_free_client(cc);
-            backend->conf.peers.ccs[i] = NULL;
-        }
-    }
-
-    cryptodev_backend_set_ready(backend, false);
-}
-
-static void
-cryptodev_builtin_class_init(ObjectClass *oc, void *data)
-{
-    CryptoDevBackendClass *bc = CRYPTODEV_BACKEND_CLASS(oc);
-
-    bc->init = cryptodev_builtin_init;
-    bc->cleanup = cryptodev_builtin_cleanup;
-    bc->create_session = cryptodev_builtin_sym_create_session;
-    bc->close_session = cryptodev_builtin_sym_close_session;
-    bc->do_sym_op = cryptodev_builtin_sym_operation;
-}
-
-static const TypeInfo cryptodev_builtin_info = {
-    .name = TYPE_CRYPTODEV_BACKEND_BUILTIN,
-    .parent = TYPE_CRYPTODEV_BACKEND,
-    .class_init = cryptodev_builtin_class_init,
-    .instance_size = sizeof(CryptoDevBackendBuiltin),
-};
-
-static void
-cryptodev_builtin_register_types(void)
-{
-    type_register_static(&cryptodev_builtin_info);
-}
-
-type_init(cryptodev_builtin_register_types);
@@ -1,271 +0,0 @@
-/*
- * QEMU Crypto Device Implementation
- *
- * Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD.
- *
- * Authors:
- *    Gonglei <arei.gonglei@huawei.com>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, see <http://www.gnu.org/licenses/>.
- *
- */
-
-#include "qemu/osdep.h"
-#include "sysemu/cryptodev.h"
-#include "hw/boards.h"
-#include "qapi/error.h"
-#include "qapi/visitor.h"
-#include "qapi-types.h"
-#include "qapi-visit.h"
-#include "qemu/config-file.h"
-#include "qom/object_interfaces.h"
-#include "hw/virtio/virtio-crypto.h"
-
-
-static QTAILQ_HEAD(, CryptoDevBackendClient) crypto_clients;
-
-
-CryptoDevBackendClient *
-cryptodev_backend_new_client(const char *model,
-                                    const char *name)
-{
-    CryptoDevBackendClient *cc;
-
-    cc = g_malloc0(sizeof(CryptoDevBackendClient));
-    cc->model = g_strdup(model);
-    if (name) {
-        cc->name = g_strdup(name);
-    }
-
-    QTAILQ_INSERT_TAIL(&crypto_clients, cc, next);
-
-    return cc;
-}
-
-void cryptodev_backend_free_client(
-                  CryptoDevBackendClient *cc)
-{
-    QTAILQ_REMOVE(&crypto_clients, cc, next);
-    g_free(cc->name);
-    g_free(cc->model);
-    g_free(cc->info_str);
-    g_free(cc);
-}
-
-void cryptodev_backend_cleanup(
-             CryptoDevBackend *backend,
-             Error **errp)
-{
-    CryptoDevBackendClass *bc =
-                  CRYPTODEV_BACKEND_GET_CLASS(backend);
-
-    if (bc->cleanup) {
-        bc->cleanup(backend, errp);
-    }
-}
-
-int64_t cryptodev_backend_sym_create_session(
-           CryptoDevBackend *backend,
-           CryptoDevBackendSymSessionInfo *sess_info,
-           uint32_t queue_index, Error **errp)
-{
-    CryptoDevBackendClass *bc =
-                      CRYPTODEV_BACKEND_GET_CLASS(backend);
-
-    if (bc->create_session) {
-        return bc->create_session(backend, sess_info, queue_index, errp);
-    }
-
-    return -1;
-}
-
-int cryptodev_backend_sym_close_session(
-           CryptoDevBackend *backend,
-           uint64_t session_id,
-           uint32_t queue_index, Error **errp)
-{
-    CryptoDevBackendClass *bc =
-                      CRYPTODEV_BACKEND_GET_CLASS(backend);
-
-    if (bc->close_session) {
-        return bc->close_session(backend, session_id, queue_index, errp);
-    }
-
-    return -1;
-}
-
-static int cryptodev_backend_sym_operation(
-                 CryptoDevBackend *backend,
-                 CryptoDevBackendSymOpInfo *op_info,
-                 uint32_t queue_index, Error **errp)
-{
-    CryptoDevBackendClass *bc =
-                      CRYPTODEV_BACKEND_GET_CLASS(backend);
-
-    if (bc->do_sym_op) {
-        return bc->do_sym_op(backend, op_info, queue_index, errp);
-    }
-
-    return -VIRTIO_CRYPTO_ERR;
-}
-
-int cryptodev_backend_crypto_operation(
-                 CryptoDevBackend *backend,
-                 void *opaque,
-                 uint32_t queue_index, Error **errp)
-{
-    VirtIOCryptoReq *req = opaque;
-
-    if (req->flags == CRYPTODEV_BACKEND_ALG_SYM) {
-        CryptoDevBackendSymOpInfo *op_info;
-        op_info = req->u.sym_op_info;
-
-        return cryptodev_backend_sym_operation(backend,
-                         op_info, queue_index, errp);
-    } else {
-        error_setg(errp, "Unsupported cryptodev alg type: %" PRIu32 "",
-                   req->flags);
-       return -VIRTIO_CRYPTO_NOTSUPP;
-    }
-
-    return -VIRTIO_CRYPTO_ERR;
-}
-
-static void
-cryptodev_backend_get_queues(Object *obj, Visitor *v, const char *name,
-                             void *opaque, Error **errp)
-{
-    CryptoDevBackend *backend = CRYPTODEV_BACKEND(obj);
-    uint32_t value = backend->conf.peers.queues;
-
-    visit_type_uint32(v, name, &value, errp);
-}
-
-static void
-cryptodev_backend_set_queues(Object *obj, Visitor *v, const char *name,
-                             void *opaque, Error **errp)
-{
-    CryptoDevBackend *backend = CRYPTODEV_BACKEND(obj);
-    Error *local_err = NULL;
-    uint32_t value;
-
-    visit_type_uint32(v, name, &value, &local_err);
-    if (local_err) {
-        goto out;
-    }
-    if (!value) {
-        error_setg(&local_err, "Property '%s.%s' doesn't take value '%"
-                   PRIu32 "'", object_get_typename(obj), name, value);
-        goto out;
-    }
-    backend->conf.peers.queues = value;
-out:
-    error_propagate(errp, local_err);
-}
-
-static void
-cryptodev_backend_complete(UserCreatable *uc, Error **errp)
-{
-    CryptoDevBackend *backend = CRYPTODEV_BACKEND(uc);
-    CryptoDevBackendClass *bc = CRYPTODEV_BACKEND_GET_CLASS(uc);
-    Error *local_err = NULL;
-
-    if (bc->init) {
-        bc->init(backend, &local_err);
-        if (local_err) {
-            goto out;
-        }
-    }
-
-    return;
-
-out:
-    error_propagate(errp, local_err);
-}
-
-void cryptodev_backend_set_used(CryptoDevBackend *backend, bool used)
-{
-    backend->is_used = used;
-}
-
-bool cryptodev_backend_is_used(CryptoDevBackend *backend)
-{
-    return backend->is_used;
-}
-
-void cryptodev_backend_set_ready(CryptoDevBackend *backend, bool ready)
-{
-    backend->ready = ready;
-}
-
-bool cryptodev_backend_is_ready(CryptoDevBackend *backend)
-{
-    return backend->ready;
-}
-
-static bool
-cryptodev_backend_can_be_deleted(UserCreatable *uc, Error **errp)
-{
-    return !cryptodev_backend_is_used(CRYPTODEV_BACKEND(uc));
-}
-
-static void cryptodev_backend_instance_init(Object *obj)
-{
-    object_property_add(obj, "queues", "int",
-                          cryptodev_backend_get_queues,
-                          cryptodev_backend_set_queues,
-                          NULL, NULL, NULL);
-    /* Initialize devices' queues property to 1 */
-    object_property_set_int(obj, 1, "queues", NULL);
-}
-
-static void cryptodev_backend_finalize(Object *obj)
-{
-    CryptoDevBackend *backend = CRYPTODEV_BACKEND(obj);
-
-    cryptodev_backend_cleanup(backend, NULL);
-}
-
-static void
-cryptodev_backend_class_init(ObjectClass *oc, void *data)
-{
-    UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
-
-    ucc->complete = cryptodev_backend_complete;
-    ucc->can_be_deleted = cryptodev_backend_can_be_deleted;
-
-    QTAILQ_INIT(&crypto_clients);
-}
-
-static const TypeInfo cryptodev_backend_info = {
-    .name = TYPE_CRYPTODEV_BACKEND,
-    .parent = TYPE_OBJECT,
-    .instance_size = sizeof(CryptoDevBackend),
-    .instance_init = cryptodev_backend_instance_init,
-    .instance_finalize = cryptodev_backend_finalize,
-    .class_size = sizeof(CryptoDevBackendClass),
-    .class_init = cryptodev_backend_class_init,
-    .interfaces = (InterfaceInfo[]) {
-        { TYPE_USER_CREATABLE },
-        { }
-    }
-};
-
-static void
-cryptodev_backend_register_types(void)
-{
-    type_register_static(&cryptodev_backend_info);
-}
-
-type_init(cryptodev_backend_register_types);
@@ -9,8 +9,6 @@
 * This work is licensed under the terms of the GNU GPL, version 2 or later.
 * See the COPYING file in the top-level directory.
 */
-#include "qemu/osdep.h"
-#include "qapi/error.h"
 #include "qemu-common.h"
 #include "sysemu/hostmem.h"
 #include "sysemu/sysemu.h"
@@ -52,18 +50,23 @@ file_backend_memory_alloc(HostMemoryBackend *backend, Error **errp)
    error_setg(errp, "-mem-path not supported on this host");
 #else
    if (!memory_region_size(&backend->mr)) {
-        gchar *path;
        backend->force_prealloc = mem_prealloc;
-        path = object_get_canonical_path(OBJECT(backend));
        memory_region_init_ram_from_file(&backend->mr, OBJECT(backend),
-                                 path,
+                                 object_get_canonical_path(OBJECT(backend)),
                                 backend->size, fb->share,
                                 fb->mem_path, errp);
-        g_free(path);
    }
 #endif
 }

+static void
+file_backend_class_init(ObjectClass *oc, void *data)
+{
+    HostMemoryBackendClass *bc = MEMORY_BACKEND_CLASS(oc);
+
+    bc->alloc = file_backend_memory_alloc;
+}
+
 static char *get_mem_path(Object *o, Error **errp)
 {
    HostMemoryBackendFile *fb = MEMORY_BACKEND_FILE(o);
@@ -80,7 +83,9 @@ static void set_mem_path(Object *o, const char *str, Error **errp)
        error_setg(errp, "cannot change property value");
        return;
    }
-    g_free(fb->mem_path);
+    if (fb->mem_path) {
+        g_free(fb->mem_path);
+    }
    fb->mem_path = g_strdup(str);
 }

@@ -104,32 +109,20 @@ static void file_memory_backend_set_share(Object *o, bool value, Error **errp)
 }

 static void
-file_backend_class_init(ObjectClass *oc, void *data)
+file_backend_instance_init(Object *o)
 {
-    HostMemoryBackendClass *bc = MEMORY_BACKEND_CLASS(oc);
-
-    bc->alloc = file_backend_memory_alloc;
-
-    object_class_property_add_bool(oc, "share",
-        file_memory_backend_get_share, file_memory_backend_set_share,
-        &error_abort);
-    object_class_property_add_str(oc, "mem-path",
-        get_mem_path, set_mem_path,
-        &error_abort);
-}
-
-static void file_backend_instance_finalize(Object *o)
-{
-    HostMemoryBackendFile *fb = MEMORY_BACKEND_FILE(o);
-
-    g_free(fb->mem_path);
+    object_property_add_bool(o, "share",
+                        file_memory_backend_get_share,
+                        file_memory_backend_set_share, NULL);
+    object_property_add_str(o, "mem-path", get_mem_path,
+                            set_mem_path, NULL);
 }

 static const TypeInfo file_backend_info = {
    .name = TYPE_MEMORY_BACKEND_FILE,
    .parent = TYPE_MEMORY_BACKEND,
    .class_init = file_backend_class_init,
-    .instance_finalize = file_backend_instance_finalize,
+    .instance_init = file_backend_instance_init,
    .instance_size = sizeof(HostMemoryBackendFile),
 };

@@ -9,9 +9,7 @@
 * This work is licensed under the terms of the GNU GPL, version 2 or later.
 * See the COPYING file in the top-level directory.
 */
-#include "qemu/osdep.h"
 #include "sysemu/hostmem.h"
-#include "qapi/error.h"
 #include "qom/object_interfaces.h"

 #define TYPE_MEMORY_BACKEND_RAM "memory-backend-ram"
@@ -9,10 +9,8 @@
 * This work is licensed under the terms of the GNU GPL, version 2 or later.
 * See the COPYING file in the top-level directory.
 */
-#include "qemu/osdep.h"
 #include "sysemu/hostmem.h"
 #include "hw/boards.h"
-#include "qapi/error.h"
 #include "qapi/visitor.h"
 #include "qapi-types.h"
 #include "qapi-visit.h"
@@ -28,18 +26,18 @@ QEMU_BUILD_BUG_ON(HOST_MEM_POLICY_INTERLEAVE != MPOL_INTERLEAVE);
 #endif

 static void
-host_memory_backend_get_size(Object *obj, Visitor *v, const char *name,
-                             void *opaque, Error **errp)
+host_memory_backend_get_size(Object *obj, Visitor *v, void *opaque,
+                             const char *name, Error **errp)
 {
    HostMemoryBackend *backend = MEMORY_BACKEND(obj);
    uint64_t value = backend->size;

-    visit_type_size(v, name, &value, errp);
+    visit_type_size(v, &value, name, errp);
 }

 static void
-host_memory_backend_set_size(Object *obj, Visitor *v, const char *name,
-                             void *opaque, Error **errp)
+host_memory_backend_set_size(Object *obj, Visitor *v, void *opaque,
+                             const char *name, Error **errp)
 {
    HostMemoryBackend *backend = MEMORY_BACKEND(obj);
    Error *local_err = NULL;
@@ -50,7 +48,7 @@ host_memory_backend_set_size(Object *obj, Visitor *v, const char *name,
        goto out;
    }

-    visit_type_size(v, name, &value, &local_err);
+    visit_type_size(v, &value, name, &local_err);
    if (local_err) {
        goto out;
    }
@@ -65,8 +63,8 @@ out:
 }

 static void
-host_memory_backend_get_host_nodes(Object *obj, Visitor *v, const char *name,
-                                   void *opaque, Error **errp)
+host_memory_backend_get_host_nodes(Object *obj, Visitor *v, void *opaque,
+                                   const char *name, Error **errp)
 {
    HostMemoryBackend *backend = MEMORY_BACKEND(obj);
    uint16List *host_nodes = NULL;
@@ -93,18 +91,18 @@ host_memory_backend_get_host_nodes(Object *obj, Visitor *v, const char *name,
        node = &(*node)->next;
    } while (true);

-    visit_type_uint16List(v, name, &host_nodes, errp);
+    visit_type_uint16List(v, &host_nodes, name, errp);
 }

 static void
-host_memory_backend_set_host_nodes(Object *obj, Visitor *v, const char *name,
-                                   void *opaque, Error **errp)
+host_memory_backend_set_host_nodes(Object *obj, Visitor *v, void *opaque,
+                                   const char *name, Error **errp)
 {
 #ifdef CONFIG_NUMA
    HostMemoryBackend *backend = MEMORY_BACKEND(obj);
    uint16List *l = NULL;

-    visit_type_uint16List(v, name, &l, errp);
+    visit_type_uint16List(v, &l, name, errp);

    while (l) {
        bitmap_set(backend->host_nodes, l->value, 1);
@@ -197,7 +195,6 @@ static bool host_memory_backend_get_prealloc(Object *obj, Error **errp)
 static void host_memory_backend_set_prealloc(Object *obj, bool value,
                                             Error **errp)
 {
-    Error *local_err = NULL;
    HostMemoryBackend *backend = MEMORY_BACKEND(obj);

    if (backend->force_prealloc) {
@@ -218,11 +215,7 @@ static void host_memory_backend_set_prealloc(Object *obj, bool value,
        void *ptr = memory_region_get_ram_ptr(&backend->mr);
        uint64_t sz = memory_region_size(&backend->mr);

-        os_mem_prealloc(fd, ptr, sz, smp_cpus, &local_err);
-        if (local_err) {
-            error_propagate(errp, local_err);
-            return;
-        }
+        os_mem_prealloc(fd, ptr, sz);
        backend->prealloc = true;
    }
 }
@@ -235,6 +228,26 @@ static void host_memory_backend_init(Object *obj)
    backend->merge = machine_mem_merge(machine);
    backend->dump = machine_dump_guest_core(machine);
    backend->prealloc = mem_prealloc;
+
+    object_property_add_bool(obj, "merge",
+                        host_memory_backend_get_merge,
+                        host_memory_backend_set_merge, NULL);
+    object_property_add_bool(obj, "dump",
+                        host_memory_backend_get_dump,
+                        host_memory_backend_set_dump, NULL);
+    object_property_add_bool(obj, "prealloc",
+                        host_memory_backend_get_prealloc,
+                        host_memory_backend_set_prealloc, NULL);
+    object_property_add(obj, "size", "int",
+                        host_memory_backend_get_size,
+                        host_memory_backend_set_size, NULL, NULL, NULL);
+    object_property_add(obj, "host-nodes", "int",
+                        host_memory_backend_get_host_nodes,
+                        host_memory_backend_set_host_nodes, NULL, NULL, NULL);
+    object_property_add_enum(obj, "policy", "HostMemPolicy",
+                             HostMemPolicy_lookup,
+                             host_memory_backend_get_policy,
+                             host_memory_backend_set_policy, NULL);
 }

 MemoryRegion *
@@ -243,16 +256,6 @@ host_memory_backend_get_memory(HostMemoryBackend *backend, Error **errp)
    return memory_region_size(&backend->mr) ? &backend->mr : NULL;
 }

-void host_memory_backend_set_mapped(HostMemoryBackend *backend, bool mapped)
-{
-    backend->is_mapped = mapped;
-}
-
-bool host_memory_backend_is_mapped(HostMemoryBackend *backend)
-{
-    return backend->is_mapped;
-}
-
 static void
 host_memory_backend_memory_complete(UserCreatable *uc, Error **errp)
 {
@@ -265,7 +268,8 @@ host_memory_backend_memory_complete(UserCreatable *uc, Error **errp)
    if (bc->alloc) {
        bc->alloc(backend, &local_err);
        if (local_err) {
-            goto out;
+            error_propagate(errp, local_err);
+            return;
        }

        ptr = memory_region_get_ram_ptr(&backend->mr);
@@ -309,11 +313,9 @@ host_memory_backend_memory_complete(UserCreatable *uc, Error **errp)
        assert(maxnode <= MAX_NODES);
        if (mbind(ptr, sz, backend->policy,
                  maxnode ? backend->host_nodes : NULL, maxnode + 1, flags)) {
-            if (backend->policy != MPOL_DEFAULT || errno != ENOSYS) {
-                error_setg_errno(errp, errno,
-                                 "cannot bind memory to host NUMA nodes");
-                return;
-            }
+            error_setg_errno(errp, errno,
+                             "cannot bind memory to host NUMA nodes");
+            return;
        }
 #endif
        /* Preallocate memory after the NUMA policy has been instantiated.
@@ -321,45 +323,24 @@ host_memory_backend_memory_complete(UserCreatable *uc, Error **errp)
         * specified NUMA policy in place.
         */
        if (backend->prealloc) {
-            os_mem_prealloc(memory_region_get_fd(&backend->mr), ptr, sz,
-                            smp_cpus, &local_err);
-            if (local_err) {
-                goto out;
-            }
+            os_mem_prealloc(memory_region_get_fd(&backend->mr), ptr, sz);
        }
    }
-out:
-    error_propagate(errp, local_err);
 }

 static bool
 host_memory_backend_can_be_deleted(UserCreatable *uc, Error **errp)
 {
-    if (host_memory_backend_is_mapped(MEMORY_BACKEND(uc))) {
+    MemoryRegion *mr;
+
+    mr = host_memory_backend_get_memory(MEMORY_BACKEND(uc), errp);
+    if (memory_region_is_mapped(mr)) {
        return false;
    } else {
        return true;
    }
 }

-static char *get_id(Object *o, Error **errp)
-{
-    HostMemoryBackend *backend = MEMORY_BACKEND(o);
-
-    return g_strdup(backend->id);
-}
-
-static void set_id(Object *o, const char *str, Error **errp)
-{
-    HostMemoryBackend *backend = MEMORY_BACKEND(o);
-
-    if (backend->id) {
-        error_setg(errp, "cannot change property value");
-        return;
-    }
-    backend->id = g_strdup(str);
-}
-
 static void
 host_memory_backend_class_init(ObjectClass *oc, void *data)
 {
@@ -367,35 +348,6 @@ host_memory_backend_class_init(ObjectClass *oc, void *data)

    ucc->complete = host_memory_backend_memory_complete;
    ucc->can_be_deleted = host_memory_backend_can_be_deleted;
-
-    object_class_property_add_bool(oc, "merge",
-        host_memory_backend_get_merge,
-        host_memory_backend_set_merge, &error_abort);
-    object_class_property_add_bool(oc, "dump",
-        host_memory_backend_get_dump,
-        host_memory_backend_set_dump, &error_abort);
-    object_class_property_add_bool(oc, "prealloc",
-        host_memory_backend_get_prealloc,
-        host_memory_backend_set_prealloc, &error_abort);
-    object_class_property_add(oc, "size", "int",
-        host_memory_backend_get_size,
-        host_memory_backend_set_size,
-        NULL, NULL, &error_abort);
-    object_class_property_add(oc, "host-nodes", "int",
-        host_memory_backend_get_host_nodes,
-        host_memory_backend_set_host_nodes,
-        NULL, NULL, &error_abort);
-    object_class_property_add_enum(oc, "policy", "HostMemPolicy",
-        HostMemPolicy_lookup,
-        host_memory_backend_get_policy,
-        host_memory_backend_set_policy, &error_abort);
-    object_class_property_add_str(oc, "id", get_id, set_id, &error_abort);
-}
-
-static void host_memory_backend_finalize(Object *o)
-{
-    HostMemoryBackend *backend = MEMORY_BACKEND(o);
-    g_free(backend->id);
 }

 static const TypeInfo host_memory_backend_info = {
@@ -406,7 +358,6 @@ static const TypeInfo host_memory_backend_info = {
    .class_init = host_memory_backend_class_init,
    .instance_size = sizeof(HostMemoryBackend),
    .instance_init = host_memory_backend_init,
-    .instance_finalize = host_memory_backend_finalize,
    .interfaces = (InterfaceInfo[]) {
        { TYPE_USER_CREATABLE },
        { }
@@ -21,60 +21,20 @@
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
-#include "qemu/osdep.h"
+#include <stdlib.h>
 #include "qemu-common.h"
 #include "sysemu/char.h"
 #include "ui/console.h"
-#include "ui/input.h"

 #define MSMOUSE_LO6(n) ((n) & 0x3f)
 #define MSMOUSE_HI2(n) (((n) & 0xc0) >> 6)

-typedef struct {
-    Chardev parent;
-
-    QemuInputHandlerState *hs;
-    int axis[INPUT_AXIS__MAX];
-    bool btns[INPUT_BUTTON__MAX];
-    bool btnc[INPUT_BUTTON__MAX];
-    uint8_t outbuf[32];
-    int outlen;
-} MouseChardev;
-
-#define TYPE_CHARDEV_MSMOUSE "chardev-msmouse"
-#define MOUSE_CHARDEV(obj)                                      \
-    OBJECT_CHECK(MouseChardev, (obj), TYPE_CHARDEV_MSMOUSE)
-
-static void msmouse_chr_accept_input(Chardev *chr)
+static void msmouse_event(void *opaque,
+                          int dx, int dy, int dz, int buttons_state)
 {
-    MouseChardev *mouse = MOUSE_CHARDEV(chr);
-    int len;
+    CharDriverState *chr = (CharDriverState *)opaque;

-    len = qemu_chr_be_can_write(chr);
-    if (len > mouse->outlen) {
-        len = mouse->outlen;
-    }
-    if (!len) {
-        return;
-    }
-
-    qemu_chr_be_write(chr, mouse->outbuf, len);
-    mouse->outlen -= len;
-    if (mouse->outlen) {
-        memmove(mouse->outbuf, mouse->outbuf + len, mouse->outlen);
-    }
-}
-
-static void msmouse_queue_event(MouseChardev *mouse)
-{
    unsigned char bytes[4] = { 0x40, 0x00, 0x00, 0x00 };
-    int dx, dy, count = 3;
-
-    dx = mouse->axis[INPUT_AXIS_X];
-    mouse->axis[INPUT_AXIS_X] = 0;
-
-    dy = mouse->axis[INPUT_AXIS_Y];
-    mouse->axis[INPUT_AXIS_Y] = 0;

    /* Movement deltas */
    bytes[0] |= (MSMOUSE_HI2(dy) << 2) | MSMOUSE_HI2(dx);
@@ -82,109 +42,44 @@ static void msmouse_queue_event(MouseChardev *mouse)
    bytes[2] |= MSMOUSE_LO6(dy);

    /* Buttons */
-    bytes[0] |= (mouse->btns[INPUT_BUTTON_LEFT]   ? 0x20 : 0x00);
-    bytes[0] |= (mouse->btns[INPUT_BUTTON_RIGHT]  ? 0x10 : 0x00);
-    if (mouse->btns[INPUT_BUTTON_MIDDLE] ||
-        mouse->btnc[INPUT_BUTTON_MIDDLE]) {
-        bytes[3] |= (mouse->btns[INPUT_BUTTON_MIDDLE] ? 0x20 : 0x00);
-        mouse->btnc[INPUT_BUTTON_MIDDLE] = false;
-        count = 4;
-    }
+    bytes[0] |= (buttons_state & 0x01 ? 0x20 : 0x00);
+    bytes[0] |= (buttons_state & 0x02 ? 0x10 : 0x00);
+    bytes[3] |= (buttons_state & 0x04 ? 0x20 : 0x00);

-    if (mouse->outlen <= sizeof(mouse->outbuf) - count) {
-        memcpy(mouse->outbuf + mouse->outlen, bytes, count);
-        mouse->outlen += count;
-    } else {
-        /* queue full -> drop event */
-    }
+    /* We always send the packet of, so that we do not have to keep track
+       of previous state of the middle button. This can potentially confuse
+       some very old drivers for two button mice though. */
+    qemu_chr_be_write(chr, bytes, 4);
 }

-static void msmouse_input_event(DeviceState *dev, QemuConsole *src,
-                                InputEvent *evt)
-{
-    MouseChardev *mouse = MOUSE_CHARDEV(dev);
-    InputMoveEvent *move;
-    InputBtnEvent *btn;
-
-    switch (evt->type) {
-    case INPUT_EVENT_KIND_REL:
-        move = evt->u.rel.data;
-        mouse->axis[move->axis] += move->value;
-        break;
-
-    case INPUT_EVENT_KIND_BTN:
-        btn = evt->u.btn.data;
-        mouse->btns[btn->button] = btn->down;
-        mouse->btnc[btn->button] = true;
-        break;
-
-    default:
-        /* keep gcc happy */
-        break;
-    }
-}
-
-static void msmouse_input_sync(DeviceState *dev)
-{
-    MouseChardev *mouse = MOUSE_CHARDEV(dev);
-    Chardev *chr = CHARDEV(dev);
-
-    msmouse_queue_event(mouse);
-    msmouse_chr_accept_input(chr);
-}
-
-static int msmouse_chr_write(struct Chardev *s, const uint8_t *buf, int len)
+static int msmouse_chr_write (struct CharDriverState *s, const uint8_t *buf, int len)
 {
    /* Ignore writes to mouse port */
    return len;
 }

-static void char_msmouse_finalize(Object *obj)
+static void msmouse_chr_close (struct CharDriverState *chr)
 {
-    MouseChardev *mouse = MOUSE_CHARDEV(obj);
-
-    qemu_input_handler_unregister(mouse->hs);
+    g_free (chr);
 }

-static QemuInputHandler msmouse_handler = {
-    .name  = "QEMU Microsoft Mouse",
-    .mask  = INPUT_EVENT_MASK_BTN | INPUT_EVENT_MASK_REL,
-    .event = msmouse_input_event,
-    .sync  = msmouse_input_sync,
-};
-
-static void msmouse_chr_open(Chardev *chr,
-                             ChardevBackend *backend,
-                             bool *be_opened,
-                             Error **errp)
+CharDriverState *qemu_chr_open_msmouse(void)
 {
-    MouseChardev *mouse = MOUSE_CHARDEV(chr);
+    CharDriverState *chr;

-    *be_opened = false;
-    mouse->hs = qemu_input_handler_register((DeviceState *)mouse,
-                                            &msmouse_handler);
+    chr = qemu_chr_alloc();
+    chr->chr_write = msmouse_chr_write;
+    chr->chr_close = msmouse_chr_close;
+    chr->explicit_be_open = true;
+
+    qemu_add_mouse_event_handler(msmouse_event, chr, 0, "QEMU Microsoft Mouse");
+
+    return chr;
 }

-static void char_msmouse_class_init(ObjectClass *oc, void *data)
-{
-    ChardevClass *cc = CHARDEV_CLASS(oc);
-
-    cc->open = msmouse_chr_open;
-    cc->chr_write = msmouse_chr_write;
-    cc->chr_accept_input = msmouse_chr_accept_input;
-}
-
-static const TypeInfo char_msmouse_type_info = {
-    .name = TYPE_CHARDEV_MSMOUSE,
-    .parent = TYPE_CHARDEV,
-    .instance_size = sizeof(MouseChardev),
-    .instance_finalize = char_msmouse_finalize,
-    .class_init = char_msmouse_class_init,
-};
-
 static void register_types(void)
 {
-    type_register_static(&char_msmouse_type_info);
+    register_char_driver("msmouse", CHARDEV_BACKEND_KIND_MSMOUSE, NULL);
 }

 type_init(register_types);
@@ -10,11 +10,10 @@
 * See the COPYING file in the top-level directory.
 */

-#include "qemu/osdep.h"
 #include "sysemu/rng.h"
 #include "sysemu/char.h"
-#include "qapi/error.h"
 #include "qapi/qmp/qerror.h"
+#include "hw/qdev.h" /* just for DEFINE_PROP_CHR */

 #define TYPE_RNG_EGD "rng-egd"
 #define RNG_EGD(obj) OBJECT_CHECK(RngEgd, (obj), TYPE_RNG_EGD)
@@ -23,14 +22,35 @@ typedef struct RngEgd
 {
    RngBackend parent;

-    CharBackend chr;
+    CharDriverState *chr;
    char *chr_name;
+
+    GSList *requests;
 } RngEgd;

-static void rng_egd_request_entropy(RngBackend *b, RngRequest *req)
+typedef struct RngRequest
+{
+    EntropyReceiveFunc *receive_entropy;
+    uint8_t *data;
+    void *opaque;
+    size_t offset;
+    size_t size;
+} RngRequest;
+
+static void rng_egd_request_entropy(RngBackend *b, size_t size,
+                                    EntropyReceiveFunc *receive_entropy,
+                                    void *opaque)
 {
    RngEgd *s = RNG_EGD(b);
-    size_t size = req->size;
+    RngRequest *req;
+
+    req = g_malloc(sizeof(*req));
+
+    req->offset = 0;
+    req->size = size;
+    req->receive_entropy = receive_entropy;
+    req->opaque = opaque;
+    req->data = g_malloc(req->size);

    while (size > 0) {
        uint8_t header[2];
@@ -40,21 +60,28 @@ static void rng_egd_request_entropy(RngBackend *b, RngRequest *req)
        header[0] = 0x02;
        header[1] = len;

-        /* XXX this blocks entire thread. Rewrite to use
-         * qemu_chr_fe_write and background I/O callbacks */
-        qemu_chr_fe_write_all(&s->chr, header, sizeof(header));
+        qemu_chr_fe_write(s->chr, header, sizeof(header));

        size -= len;
    }
+
+    s->requests = g_slist_append(s->requests, req);
+}
+
+static void rng_egd_free_request(RngRequest *req)
+{
+    g_free(req->data);
+    g_free(req);
 }

 static int rng_egd_chr_can_read(void *opaque)
 {
    RngEgd *s = RNG_EGD(opaque);
-    RngRequest *req;
+    GSList *i;
    int size = 0;

-    QSIMPLEQ_FOREACH(req, &s->parent.requests, next) {
+    for (i = s->requests; i; i = i->next) {
+        RngRequest *req = i->data;
        size += req->size - req->offset;
    }

@@ -66,8 +93,8 @@ static void rng_egd_chr_read(void *opaque, const uint8_t *buf, int size)
    RngEgd *s = RNG_EGD(opaque);
    size_t buf_offset = 0;

-    while (size > 0 && !QSIMPLEQ_EMPTY(&s->parent.requests)) {
-        RngRequest *req = QSIMPLEQ_FIRST(&s->parent.requests);
+    while (size > 0 && s->requests) {
+        RngRequest *req = s->requests->data;
        int len = MIN(size, req->size - req->offset);

        memcpy(req->data + req->offset, buf + buf_offset, len);
@@ -76,17 +103,41 @@ static void rng_egd_chr_read(void *opaque, const uint8_t *buf, int size)
        size -= len;

        if (req->offset == req->size) {
+            s->requests = g_slist_remove_link(s->requests, s->requests);
+
            req->receive_entropy(req->opaque, req->data, req->size);

-            rng_backend_finalize_request(&s->parent, req);
+            rng_egd_free_request(req);
        }
    }
 }

+static void rng_egd_free_requests(RngEgd *s)
+{
+    GSList *i;
+
+    for (i = s->requests; i; i = i->next) {
+        rng_egd_free_request(i->data);
+    }
+
+    g_slist_free(s->requests);
+    s->requests = NULL;
+}
+
+static void rng_egd_cancel_requests(RngBackend *b)
+{
+    RngEgd *s = RNG_EGD(b);
+
+    /* We simply delete the list of pending requests.  If there is data in the 
+     * queue waiting to be read, this is okay, because there will always be
+     * more data than we requested originally
+     */
+    rng_egd_free_requests(s);
+}
+
 static void rng_egd_opened(RngBackend *b, Error **errp)
 {
    RngEgd *s = RNG_EGD(b);
-    Chardev *chr;

    if (s->chr_name == NULL) {
        error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
@@ -94,19 +145,21 @@ static void rng_egd_opened(RngBackend *b, Error **errp)
        return;
    }

-    chr = qemu_chr_find(s->chr_name);
-    if (chr == NULL) {
+    s->chr = qemu_chr_find(s->chr_name);
+    if (s->chr == NULL) {
        error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
                  "Device '%s' not found", s->chr_name);
        return;
    }
-    if (!qemu_chr_fe_init(&s->chr, chr, errp)) {
+
+    if (qemu_chr_fe_claim(s->chr) != 0) {
+        error_setg(errp, QERR_DEVICE_IN_USE, s->chr_name);
        return;
    }

    /* FIXME we should resubmit pending requests when the CDS reconnects. */
-    qemu_chr_fe_set_handlers(&s->chr, rng_egd_chr_can_read,
-                             rng_egd_chr_read, NULL, s, NULL, true);
+    qemu_chr_add_handlers(s->chr, rng_egd_chr_can_read, rng_egd_chr_read,
+                          NULL, s);
 }

 static void rng_egd_set_chardev(Object *obj, const char *value, Error **errp)
@@ -125,10 +178,9 @@ static void rng_egd_set_chardev(Object *obj, const char *value, Error **errp)
 static char *rng_egd_get_chardev(Object *obj, Error **errp)
 {
    RngEgd *s = RNG_EGD(obj);
-    Chardev *chr = qemu_chr_fe_get_driver(&s->chr);

-    if (chr && chr->label) {
-        return g_strdup(chr->label);
+    if (s->chr && s->chr->label) {
+        return g_strdup(s->chr->label);
    }

    return NULL;
@@ -145,8 +197,14 @@ static void rng_egd_finalize(Object *obj)
 {
    RngEgd *s = RNG_EGD(obj);

-    qemu_chr_fe_deinit(&s->chr);
+    if (s->chr) {
+        qemu_chr_add_handlers(s->chr, NULL, NULL, NULL, NULL);
+        qemu_chr_fe_release(s->chr);
+    }
+
    g_free(s->chr_name);
+
+    rng_egd_free_requests(s);
 }

 static void rng_egd_class_init(ObjectClass *klass, void *data)
@@ -154,6 +212,7 @@ static void rng_egd_class_init(ObjectClass *klass, void *data)
    RngBackendClass *rbc = RNG_BACKEND_CLASS(klass);

    rbc->request_entropy = rng_egd_request_entropy;
+    rbc->cancel_requests = rng_egd_cancel_requests;
    rbc->opened = rng_egd_opened;
 }

@@ -10,19 +10,21 @@
 * See the COPYING file in the top-level directory.
 */

-#include "qemu/osdep.h"
 #include "sysemu/rng-random.h"
 #include "sysemu/rng.h"
-#include "qapi/error.h"
 #include "qapi/qmp/qerror.h"
 #include "qemu/main-loop.h"

-struct RngRandom
+struct RndRandom
 {
    RngBackend parent;

    int fd;
    char *filename;
+
+    EntropyReceiveFunc *receive_func;
+    void *opaque;
+    size_t size;
 };

 /**
@@ -34,41 +36,42 @@ struct RngRandom

 static void entropy_available(void *opaque)
 {
-    RngRandom *s = RNG_RANDOM(opaque);
+    RndRandom *s = RNG_RANDOM(opaque);
+    uint8_t buffer[s->size];
+    ssize_t len;

-    while (!QSIMPLEQ_EMPTY(&s->parent.requests)) {
-        RngRequest *req = QSIMPLEQ_FIRST(&s->parent.requests);
-        ssize_t len;
-
-        len = read(s->fd, req->data, req->size);
-        if (len < 0 && errno == EAGAIN) {
-            return;
-        }
-        g_assert(len != -1);
-
-        req->receive_entropy(req->opaque, req->data, len);
-
-        rng_backend_finalize_request(&s->parent, req);
+    len = read(s->fd, buffer, s->size);
+    if (len < 0 && errno == EAGAIN) {
+        return;
    }
+    g_assert(len != -1);
+
+    s->receive_func(s->opaque, buffer, len);
+    s->receive_func = NULL;

-    /* We've drained all requests, the fd handler can be reset. */
    qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
 }

-static void rng_random_request_entropy(RngBackend *b, RngRequest *req)
+static void rng_random_request_entropy(RngBackend *b, size_t size,
+                                        EntropyReceiveFunc *receive_entropy,
+                                        void *opaque)
 {
-    RngRandom *s = RNG_RANDOM(b);
+    RndRandom *s = RNG_RANDOM(b);

-    if (QSIMPLEQ_EMPTY(&s->parent.requests)) {
-        /* If there are no pending requests yet, we need to
-         * install our fd handler. */
-        qemu_set_fd_handler(s->fd, entropy_available, NULL, s);
+    if (s->receive_func) {
+        s->receive_func(s->opaque, NULL, 0);
    }
+
+    s->receive_func = receive_entropy;
+    s->opaque = opaque;
+    s->size = size;
+
+    qemu_set_fd_handler(s->fd, entropy_available, NULL, s);
 }

 static void rng_random_opened(RngBackend *b, Error **errp)
 {
-    RngRandom *s = RNG_RANDOM(b);
+    RndRandom *s = RNG_RANDOM(b);

    if (s->filename == NULL) {
        error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
@@ -83,7 +86,7 @@ static void rng_random_opened(RngBackend *b, Error **errp)

 static char *rng_random_get_filename(Object *obj, Error **errp)
 {
-    RngRandom *s = RNG_RANDOM(obj);
+    RndRandom *s = RNG_RANDOM(obj);

    return g_strdup(s->filename);
 }
@@ -92,7 +95,7 @@ static void rng_random_set_filename(Object *obj, const char *filename,
                                 Error **errp)
 {
    RngBackend *b = RNG_BACKEND(obj);
-    RngRandom *s = RNG_RANDOM(obj);
+    RndRandom *s = RNG_RANDOM(obj);

    if (b->opened) {
        error_setg(errp, QERR_PERMISSION_DENIED);
@@ -105,7 +108,7 @@ static void rng_random_set_filename(Object *obj, const char *filename,

 static void rng_random_init(Object *obj)
 {
-    RngRandom *s = RNG_RANDOM(obj);
+    RndRandom *s = RNG_RANDOM(obj);

    object_property_add_str(obj, "filename",
                            rng_random_get_filename,
@@ -118,7 +121,7 @@ static void rng_random_init(Object *obj)

 static void rng_random_finalize(Object *obj)
 {
-    RngRandom *s = RNG_RANDOM(obj);
+    RndRandom *s = RNG_RANDOM(obj);

    if (s->fd != -1) {
        qemu_set_fd_handler(s->fd, NULL, NULL, NULL);
@@ -139,7 +142,7 @@ static void rng_random_class_init(ObjectClass *klass, void *data)
 static const TypeInfo rng_random_info = {
    .name = TYPE_RNG_RANDOM,
    .parent = TYPE_RNG_BACKEND,
-    .instance_size = sizeof(RngRandom),
+    .instance_size = sizeof(RndRandom),
    .class_init = rng_random_class_init,
    .instance_init = rng_random_init,
    .instance_finalize = rng_random_finalize,
@@ -10,9 +10,7 @@
 * See the COPYING file in the top-level directory.
 */

-#include "qemu/osdep.h"
 #include "sysemu/rng.h"
-#include "qapi/error.h"
 #include "qapi/qmp/qerror.h"
 #include "qom/object_interfaces.h"

@@ -21,20 +19,18 @@ void rng_backend_request_entropy(RngBackend *s, size_t size,
                                 void *opaque)
 {
    RngBackendClass *k = RNG_BACKEND_GET_CLASS(s);
-    RngRequest *req;

    if (k->request_entropy) {
-        req = g_malloc(sizeof(*req));
+        k->request_entropy(s, size, receive_entropy, opaque);
+    }
+}

-        req->offset = 0;
-        req->size = size;
-        req->receive_entropy = receive_entropy;
-        req->opaque = opaque;
-        req->data = g_malloc(req->size);
+void rng_backend_cancel_requests(RngBackend *s)
+{
+    RngBackendClass *k = RNG_BACKEND_GET_CLASS(s);

-        k->request_entropy(s, req);
-
-        QSIMPLEQ_INSERT_TAIL(&s->requests, req, next);
+    if (k->cancel_requests) {
+        k->cancel_requests(s);
    }
 }

@@ -76,48 +72,14 @@ static void rng_backend_prop_set_opened(Object *obj, bool value, Error **errp)
    s->opened = true;
 }

-static void rng_backend_free_request(RngRequest *req)
-{
-    g_free(req->data);
-    g_free(req);
-}
-
-static void rng_backend_free_requests(RngBackend *s)
-{
-    RngRequest *req, *next;
-
-    QSIMPLEQ_FOREACH_SAFE(req, &s->requests, next, next) {
-        rng_backend_free_request(req);
-    }
-
-    QSIMPLEQ_INIT(&s->requests);
-}
-
-void rng_backend_finalize_request(RngBackend *s, RngRequest *req)
-{
-    QSIMPLEQ_REMOVE(&s->requests, req, RngRequest, next);
-    rng_backend_free_request(req);
-}
-
 static void rng_backend_init(Object *obj)
 {
-    RngBackend *s = RNG_BACKEND(obj);
-
-    QSIMPLEQ_INIT(&s->requests);
-
    object_property_add_bool(obj, "opened",
                             rng_backend_prop_get_opened,
                             rng_backend_prop_set_opened,
                             NULL);
 }

-static void rng_backend_finalize(Object *obj)
-{
-    RngBackend *s = RNG_BACKEND(obj);
-
-    rng_backend_free_requests(s);
-}
-
 static void rng_backend_class_init(ObjectClass *oc, void *data)
 {
    UserCreatableClass *ucc = USER_CREATABLE_CLASS(oc);
@@ -130,7 +92,6 @@ static const TypeInfo rng_backend_info = {
    .parent = TYPE_OBJECT,
    .instance_size = sizeof(RngBackend),
    .instance_init = rng_backend_init,
-    .instance_finalize = rng_backend_finalize,
    .class_size = sizeof(RngBackendClass),
    .class_init = rng_backend_class_init,
    .abstract = true,
@@ -23,25 +23,19 @@
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
-#include "qemu/osdep.h"
 #include "qemu-common.h"
 #include "sysemu/char.h"

 #define BUF_SIZE 32

 typedef struct {
-    Chardev parent;
-
+    CharDriverState *chr;
    uint8_t in_buf[32];
    int in_buf_used;
-} TestdevChardev;
-
-#define TYPE_CHARDEV_TESTDEV "chardev-testdev"
-#define TESTDEV_CHARDEV(obj)                                    \
-    OBJECT_CHECK(TestdevChardev, (obj), TYPE_CHARDEV_TESTDEV)
+} TestdevCharState;

 /* Try to interpret a whole incoming packet */
-static int testdev_eat_packet(TestdevChardev *testdev)
+static int testdev_eat_packet(TestdevCharState *testdev)
 {
    const uint8_t *cur = testdev->in_buf;
    int len = testdev->in_buf_used;
@@ -82,9 +76,9 @@ static int testdev_eat_packet(TestdevChardev *testdev)
 }

 /* The other end is writing some data.  Store it and try to interpret */
-static int testdev_chr_write(Chardev *chr, const uint8_t *buf, int len)
+static int testdev_write(CharDriverState *chr, const uint8_t *buf, int len)
 {
-    TestdevChardev *testdev = TESTDEV_CHARDEV(chr);
+    TestdevCharState *testdev = chr->opaque;
    int tocopy, eaten, orig_len = len;

    while (len) {
@@ -107,23 +101,31 @@ static int testdev_chr_write(Chardev *chr, const uint8_t *buf, int len)
    return orig_len;
 }

-static void char_testdev_class_init(ObjectClass *oc, void *data)
+static void testdev_close(struct CharDriverState *chr)
 {
-    ChardevClass *cc = CHARDEV_CLASS(oc);
+    TestdevCharState *testdev = chr->opaque;

-    cc->chr_write = testdev_chr_write;
+    g_free(testdev);
 }

-static const TypeInfo char_testdev_type_info = {
-    .name = TYPE_CHARDEV_TESTDEV,
-    .parent = TYPE_CHARDEV,
-    .instance_size = sizeof(TestdevChardev),
-    .class_init = char_testdev_class_init,
-};
+CharDriverState *chr_testdev_init(void)
+{
+    TestdevCharState *testdev;
+    CharDriverState *chr;
+
+    testdev = g_malloc0(sizeof(TestdevCharState));
+    testdev->chr = chr = g_malloc0(sizeof(CharDriverState));
+
+    chr->opaque = testdev;
+    chr->chr_write = testdev_write;
+    chr->chr_close = testdev_close;
+
+    return chr;
+}

 static void register_types(void)
 {
-    type_register_static(&char_testdev_type_info);
+    register_char_driver("testdev", CHARDEV_BACKEND_KIND_TESTDEV, NULL);
 }

 type_init(register_types);
@@ -12,9 +12,7 @@
 * Based on backends/rng.c by Anthony Liguori
 */

-#include "qemu/osdep.h"
 #include "sysemu/tpm_backend.h"
-#include "qapi/error.h"
 #include "qapi/qmp/qerror.h"
 #include "sysemu/tpm.h"
 #include "qemu/thread.h"
@@ -1,10 +0,0 @@
-# See docs/tracing.txt for syntax documentation.
-
-# backends/wctablet.c
-wct_init(void) ""
-wct_cmd_re(void) ""
-wct_cmd_st(void) ""
-wct_cmd_sp(void) ""
-wct_cmd_ts(int input) "0x%02x"
-wct_cmd_other(const char *cmd) "%s"
-wct_speed(int speed) "%d"
@@ -1,369 +0,0 @@
-/*
- * QEMU Wacom Penpartner serial tablet emulation
- *
- * some protocol details:
- *   http://linuxwacom.sourceforge.net/wiki/index.php/Serial_Protocol_IV
- *
- * Copyright (c) 2016 Anatoli Huseu1
- * Copyright (c) 2016,17 Gerd Hoffmann
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to
- * deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-#include <stdlib.h>
-#include <string.h>
-#include <sys/time.h>
-#include <time.h>
-
-#include "qemu/osdep.h"
-#include "qemu-common.h"
-#include "sysemu/char.h"
-#include "ui/console.h"
-#include "ui/input.h"
-#include "trace.h"
-
-
-#define WC_OUTPUT_BUF_MAX_LEN 512
-#define WC_COMMAND_MAX_LEN 60
-
-#define WC_L7(n) ((n) & 127)
-#define WC_M7(n) (((n) >> 7) & 127)
-#define WC_H2(n) ((n) >> 14)
-
-#define WC_L4(n) ((n) & 15)
-#define WC_H4(n) (((n) >> 4) & 15)
-
-/* Model string and config string */
-#define WC_MODEL_STRING_LENGTH 18
-uint8_t WC_MODEL_STRING[WC_MODEL_STRING_LENGTH + 1] = "~#CT-0045R,V1.3-5,";
-
-#define WC_CONFIG_STRING_LENGTH 8
-uint8_t WC_CONFIG_STRING[WC_CONFIG_STRING_LENGTH + 1] = "96,N,8,0";
-
-#define WC_FULL_CONFIG_STRING_LENGTH 61
-uint8_t WC_FULL_CONFIG_STRING[WC_FULL_CONFIG_STRING_LENGTH + 1] = {
-    0x5c, 0x39, 0x36, 0x2c, 0x4e, 0x2c, 0x38, 0x2c,
-    0x31, 0x28, 0x01, 0x24, 0x57, 0x41, 0x43, 0x30,
-    0x30, 0x34, 0x35, 0x5c, 0x5c, 0x50, 0x45, 0x4e, 0x5c,
-    0x57, 0x41, 0x43, 0x30, 0x30, 0x30, 0x30, 0x5c,
-    0x54, 0x61, 0x62, 0x6c, 0x65, 0x74, 0x0d, 0x0a,
-    0x43, 0x54, 0x2d, 0x30, 0x30, 0x34, 0x35, 0x52,
-    0x2c, 0x56, 0x31, 0x2e, 0x33, 0x2d, 0x35, 0x0d,
-    0x0a, 0x45, 0x37, 0x29
-};
-
-/* This structure is used to save private info for Wacom Tablet. */
-typedef struct {
-    Chardev parent;
-    QemuInputHandlerState *hs;
-
-    /* Query string from serial */
-    uint8_t query[100];
-    int query_index;
-
-    /* Command to be sent to serial port */
-    uint8_t outbuf[WC_OUTPUT_BUF_MAX_LEN];
-    int outlen;
-
-    int line_speed;
-    bool send_events;
-    int axis[INPUT_AXIS__MAX];
-    bool btns[INPUT_BUTTON__MAX];
-
-} TabletChardev;
-
-#define TYPE_CHARDEV_WCTABLET "chardev-wctablet"
-#define WCTABLET_CHARDEV(obj)                                      \
-    OBJECT_CHECK(TabletChardev, (obj), TYPE_CHARDEV_WCTABLET)
-
-
-static void wctablet_chr_accept_input(Chardev *chr);
-
-static void wctablet_shift_input(TabletChardev *tablet, int count)
-{
-    tablet->query_index -= count;
-    memmove(tablet->query, tablet->query + count, tablet->query_index);
-    tablet->query[tablet->query_index] = 0;
-}
-
-static void wctablet_queue_output(TabletChardev *tablet, uint8_t *buf, int count)
-{
-    if (tablet->outlen + count > sizeof(tablet->outbuf)) {
-        return;
-    }
-
-    memcpy(tablet->outbuf + tablet->outlen, buf, count);
-    tablet->outlen += count;
-    wctablet_chr_accept_input(CHARDEV(tablet));
-}
-
-static void wctablet_reset(TabletChardev *tablet)
-{
-    /* clear buffers */
-    tablet->query_index = 0;
-    tablet->outlen = 0;
-    /* reset state */
-    tablet->send_events = false;
-}
-
-static void wctablet_queue_event(TabletChardev *tablet)
-{
-    uint8_t codes[8] = { 0xe0, 0, 0, 0, 0, 0, 0 };
-
-    if (tablet->line_speed != 9600) {
-        return;
-    }
-
-    int newX = tablet->axis[INPUT_AXIS_X] * 0.1537;
-    int nexY = tablet->axis[INPUT_AXIS_Y] * 0.1152;
-
-    codes[0] = codes[0] | WC_H2(newX);
-    codes[1] = codes[1] | WC_M7(newX);
-    codes[2] = codes[2] | WC_L7(newX);
-
-    codes[3] = codes[3] | WC_H2(nexY);
-    codes[4] = codes[4] | WC_M7(nexY);
-    codes[5] = codes[5] | WC_L7(nexY);
-
-    if (tablet->btns[INPUT_BUTTON_LEFT]) {
-        codes[0] = 0xa0;
-    }
-
-    wctablet_queue_output(tablet, codes, 7);
-}
-
-static void wctablet_input_event(DeviceState *dev, QemuConsole *src,
-                                InputEvent *evt)
-{
-    TabletChardev *tablet = (TabletChardev *)dev;
-    InputMoveEvent *move;
-    InputBtnEvent *btn;
-
-    switch (evt->type) {
-    case INPUT_EVENT_KIND_ABS:
-        move = evt->u.abs.data;
-        tablet->axis[move->axis] = move->value;
-        break;
-
-    case INPUT_EVENT_KIND_BTN:
-        btn = evt->u.btn.data;
-        tablet->btns[btn->button] = btn->down;
-        break;
-
-    default:
-        /* keep gcc happy */
-        break;
-    }
-}
-
-static void wctablet_input_sync(DeviceState *dev)
-{
-    TabletChardev *tablet = (TabletChardev *)dev;
-
-    if (tablet->send_events) {
-        wctablet_queue_event(tablet);
-    }
-}
-
-static QemuInputHandler wctablet_handler = {
-    .name  = "QEMU Wacome Pen Tablet",
-    .mask  = INPUT_EVENT_MASK_BTN | INPUT_EVENT_MASK_ABS,
-    .event = wctablet_input_event,
-    .sync  = wctablet_input_sync,
-};
-
-static void wctablet_chr_accept_input(Chardev *chr)
-{
-    TabletChardev *tablet = WCTABLET_CHARDEV(chr);
-    int len, canWrite;
-
-    canWrite = qemu_chr_be_can_write(chr);
-    len = canWrite;
-    if (len > tablet->outlen) {
-        len = tablet->outlen;
-    }
-
-    if (len) {
-        qemu_chr_be_write(chr, tablet->outbuf, len);
-        tablet->outlen -= len;
-        if (tablet->outlen) {
-            memmove(tablet->outbuf, tablet->outbuf + len, tablet->outlen);
-        }
-    }
-}
-
-static int wctablet_chr_write(struct Chardev *chr,
-                              const uint8_t *buf, int len)
-{
-    TabletChardev *tablet = WCTABLET_CHARDEV(chr);
-    unsigned int i, clen;
-    char *pos;
-
-    if (tablet->line_speed != 9600) {
-        return len;
-    }
-    for (i = 0; i < len && tablet->query_index < sizeof(tablet->query) - 1; i++) {
-        tablet->query[tablet->query_index++] = buf[i];
-    }
-    tablet->query[tablet->query_index] = 0;
-
-    while (tablet->query_index > 0 && (tablet->query[0] == '@'  ||
-                                       tablet->query[0] == '\r' ||
-                                       tablet->query[0] == '\n')) {
-        wctablet_shift_input(tablet, 1);
-    }
-    if (!tablet->query_index) {
-        return len;
-    }
-
-    if (strncmp((char *)tablet->query, "~#", 2) == 0) {
-        /* init / detect sequence */
-        trace_wct_init();
-        wctablet_shift_input(tablet, 2);
-        wctablet_queue_output(tablet, WC_MODEL_STRING,
-                              WC_MODEL_STRING_LENGTH);
-        return len;
-    }
-
-    /* detect line */
-    pos = strchr((char *)tablet->query, '\r');
-    if (!pos) {
-        pos = strchr((char *)tablet->query, '\n');
-    }
-    if (!pos) {
-        return len;
-    }
-    clen = pos - (char *)tablet->query;
-
-    /* process commands */
-    if (strncmp((char *)tablet->query, "RE", 2) == 0 &&
-        clen == 2) {
-        trace_wct_cmd_re();
-        wctablet_shift_input(tablet, 3);
-        wctablet_queue_output(tablet, WC_CONFIG_STRING,
-                              WC_CONFIG_STRING_LENGTH);
-
-    } else if (strncmp((char *)tablet->query, "ST", 2) == 0 &&
-               clen == 2) {
-        trace_wct_cmd_st();
-        wctablet_shift_input(tablet, 3);
-        tablet->send_events = true;
-        wctablet_queue_event(tablet);
-
-    } else if (strncmp((char *)tablet->query, "SP", 2) == 0 &&
-               clen == 2) {
-        trace_wct_cmd_sp();
-        wctablet_shift_input(tablet, 3);
-        tablet->send_events = false;
-
-    } else if (strncmp((char *)tablet->query, "TS", 2) == 0 &&
-               clen == 3) {
-        unsigned int input = tablet->query[2];
-        uint8_t codes[7] = {
-            0xa3,
-            ((input & 0x80) == 0) ? 0x7e : 0x7f,
-            (((WC_H4(input) & 0x7) ^ 0x5) << 4) | (WC_L4(input) ^ 0x7),
-            0x03,
-            0x7f,
-            0x7f,
-            0x00,
-        };
-        trace_wct_cmd_ts(input);
-        wctablet_shift_input(tablet, 4);
-        wctablet_queue_output(tablet, codes, 7);
-
-    } else {
-        tablet->query[clen] = 0; /* terminate line for printing */
-        trace_wct_cmd_other((char *)tablet->query);
-        wctablet_shift_input(tablet, clen + 1);
-
-    }
-
-    return len;
-}
-
-static int wctablet_chr_ioctl(Chardev *chr, int cmd, void *arg)
-{
-    TabletChardev *tablet = WCTABLET_CHARDEV(chr);
-    QEMUSerialSetParams *ssp;
-
-    switch (cmd) {
-    case CHR_IOCTL_SERIAL_SET_PARAMS:
-        ssp = arg;
-        if (tablet->line_speed != ssp->speed) {
-            trace_wct_speed(ssp->speed);
-            wctablet_reset(tablet);
-            tablet->line_speed = ssp->speed;
-        }
-        break;
-    default:
-        return -ENOTSUP;
-    }
-    return 0;
-}
-
-static void wctablet_chr_finalize(Object *obj)
-{
-    TabletChardev *tablet = WCTABLET_CHARDEV(obj);
-
-    qemu_input_handler_unregister(tablet->hs);
-    g_free(tablet);
-}
-
-static void wctablet_chr_open(Chardev *chr,
-                              ChardevBackend *backend,
-                              bool *be_opened,
-                              Error **errp)
-{
-    TabletChardev *tablet = WCTABLET_CHARDEV(chr);
-
-    *be_opened = true;
-
-    /* init state machine */
-    memcpy(tablet->outbuf, WC_FULL_CONFIG_STRING, WC_FULL_CONFIG_STRING_LENGTH);
-    tablet->outlen = WC_FULL_CONFIG_STRING_LENGTH;
-    tablet->query_index = 0;
-
-    tablet->hs = qemu_input_handler_register((DeviceState *)tablet,
-                                             &wctablet_handler);
-}
-
-static void wctablet_chr_class_init(ObjectClass *oc, void *data)
-{
-    ChardevClass *cc = CHARDEV_CLASS(oc);
-
-    cc->open = wctablet_chr_open;
-    cc->chr_write = wctablet_chr_write;
-    cc->chr_ioctl = wctablet_chr_ioctl;
-    cc->chr_accept_input = wctablet_chr_accept_input;
-}
-
-static const TypeInfo wctablet_type_info = {
-    .name = TYPE_CHARDEV_WCTABLET,
-    .parent = TYPE_CHARDEV,
-    .instance_size = sizeof(TabletChardev),
-    .instance_finalize = wctablet_chr_finalize,
-    .class_init = wctablet_chr_class_init,
-};
-
-static void register_types(void)
-{
-     type_register_static(&wctablet_type_info);
-}
-
-type_init(register_types);
@@ -24,12 +24,11 @@
 * THE SOFTWARE.
 */

-#include "qemu/osdep.h"
 #include "qemu-common.h"
 #include "exec/cpu-common.h"
 #include "sysemu/kvm.h"
 #include "sysemu/balloon.h"
-#include "trace-root.h"
+#include "trace.h"
 #include "qmp-commands.h"
 #include "qapi/qmp/qerror.h"
 #include "qapi/qmp/qjson.h"
@@ -37,17 +36,6 @@
 static QEMUBalloonEvent *balloon_event_fn;
 static QEMUBalloonStatus *balloon_stat_fn;
 static void *balloon_opaque;
-static bool balloon_inhibited;
-
-bool qemu_balloon_is_inhibited(void)
-{
-    return balloon_inhibited;
-}
-
-void qemu_balloon_inhibit(bool state)
-{
-    balloon_inhibited = state;
-}

 static bool have_balloon(Error **errp)
 {
@@ -1,35 +1,32 @@
-block-obj-y += raw-format.o qcow.o vdi.o vmdk.o cloop.o bochs.o vpc.o vvfat.o dmg.o
+block-obj-y += raw_bsd.o qcow.o vdi.o vmdk.o cloop.o bochs.o vpc.o vvfat.o
 block-obj-y += qcow2.o qcow2-refcount.o qcow2-cluster.o qcow2-snapshot.o qcow2-cache.o
 block-obj-y += qed.o qed-gencb.o qed-l2-cache.o qed-table.o qed-cluster.o
 block-obj-y += qed-check.o
-block-obj-y += vhdx.o vhdx-endian.o vhdx-log.o
+block-obj-$(CONFIG_VHDX) += vhdx.o vhdx-endian.o vhdx-log.o
 block-obj-y += quorum.o
-block-obj-y += parallels.o blkdebug.o blkverify.o blkreplay.o
+block-obj-y += parallels.o blkdebug.o blkverify.o
 block-obj-y += block-backend.o snapshot.o qapi.o
-block-obj-$(CONFIG_WIN32) += file-win32.o win32-aio.o
-block-obj-$(CONFIG_POSIX) += file-posix.o
+block-obj-$(CONFIG_WIN32) += raw-win32.o win32-aio.o
+block-obj-$(CONFIG_POSIX) += raw-posix.o
 block-obj-$(CONFIG_LINUX_AIO) += linux-aio.o
-block-obj-y += null.o mirror.o commit.o io.o
+block-obj-y += null.o mirror.o io.o
 block-obj-y += throttle-groups.o

 block-obj-y += nbd.o nbd-client.o sheepdog.o
 block-obj-$(CONFIG_LIBISCSI) += iscsi.o
-block-obj-$(if $(CONFIG_LIBISCSI),y,n) += iscsi-opts.o
 block-obj-$(CONFIG_LIBNFS) += nfs.o
 block-obj-$(CONFIG_CURL) += curl.o
 block-obj-$(CONFIG_RBD) += rbd.o
 block-obj-$(CONFIG_GLUSTERFS) += gluster.o
+block-obj-$(CONFIG_ARCHIPELAGO) += archipelago.o
 block-obj-$(CONFIG_LIBSSH2) += ssh.o
-block-obj-y += accounting.o dirty-bitmap.o
+block-obj-y += accounting.o
 block-obj-y += write-threshold.o
-block-obj-y += backup.o
-block-obj-$(CONFIG_REPLICATION) += replication.o
-
-block-obj-y += crypto.o

 common-obj-y += stream.o
+common-obj-y += commit.o
+common-obj-y += backup.o

-nfs.o-libs         := $(LIBNFS_LIBS)
 iscsi.o-cflags     := $(LIBISCSI_CFLAGS)
 iscsi.o-libs       := $(LIBISCSI_LIBS)
 curl.o-cflags      := $(CURL_CFLAGS)
@@ -40,7 +37,8 @@ gluster.o-cflags   := $(GLUSTERFS_CFLAGS)
 gluster.o-libs     := $(GLUSTERFS_LIBS)
 ssh.o-cflags       := $(LIBSSH2_CFLAGS)
 ssh.o-libs         := $(LIBSSH2_LIBS)
-block-obj-$(if $(CONFIG_BZIP2),m,n) += dmg-bz2.o
-dmg-bz2.o-libs     := $(BZIP2_LIBS)
+archipelago.o-libs := $(ARCHIPELAGO_LIBS)
+block-obj-m        += dmg.o
+dmg.o-libs         := $(BZIP2_LIBS)
 qcow.o-libs        := -lz
 linux-aio.o-libs   := -laio
@@ -2,7 +2,6 @@
 * QEMU System Emulator block accounting
 *
 * Copyright (c) 2011 Christoph Hellwig
- * Copyright (c) 2015 Igalia, S.L.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
@@ -23,58 +22,9 @@
 * THE SOFTWARE.
 */

-#include "qemu/osdep.h"
 #include "block/accounting.h"
 #include "block/block_int.h"
 #include "qemu/timer.h"
-#include "sysemu/qtest.h"
-
-static QEMUClockType clock_type = QEMU_CLOCK_REALTIME;
-static const int qtest_latency_ns = NANOSECONDS_PER_SECOND / 1000;
-
-void block_acct_init(BlockAcctStats *stats, bool account_invalid,
-                     bool account_failed)
-{
-    stats->account_invalid = account_invalid;
-    stats->account_failed = account_failed;
-
-    if (qtest_enabled()) {
-        clock_type = QEMU_CLOCK_VIRTUAL;
-    }
-}
-
-void block_acct_cleanup(BlockAcctStats *stats)
-{
-    BlockAcctTimedStats *s, *next;
-    QSLIST_FOREACH_SAFE(s, &stats->intervals, entries, next) {
-        g_free(s);
-    }
-}
-
-void block_acct_add_interval(BlockAcctStats *stats, unsigned interval_length)
-{
-    BlockAcctTimedStats *s;
-    unsigned i;
-
-    s = g_new0(BlockAcctTimedStats, 1);
-    s->interval_length = interval_length;
-    QSLIST_INSERT_HEAD(&stats->intervals, s, entries);
-
-    for (i = 0; i < BLOCK_MAX_IOTYPE; i++) {
-        timed_average_init(&s->latency[i], clock_type,
-                           (uint64_t) interval_length * NANOSECONDS_PER_SECOND);
-    }
-}
-
-BlockAcctTimedStats *block_acct_interval_next(BlockAcctStats *stats,
-                                              BlockAcctTimedStats *s)
-{
-    if (s == NULL) {
-        return QSLIST_FIRST(&stats->intervals);
-    } else {
-        return QSLIST_NEXT(s, entries);
-    }
-}

 void block_acct_start(BlockAcctStats *stats, BlockAcctCookie *cookie,
                      int64_t bytes, enum BlockAcctType type)
@@ -82,69 +32,26 @@ void block_acct_start(BlockAcctStats *stats, BlockAcctCookie *cookie,
    assert(type < BLOCK_MAX_IOTYPE);

    cookie->bytes = bytes;
-    cookie->start_time_ns = qemu_clock_get_ns(clock_type);
+    cookie->start_time_ns = qemu_clock_get_ns(QEMU_CLOCK_REALTIME);
    cookie->type = type;
 }

 void block_acct_done(BlockAcctStats *stats, BlockAcctCookie *cookie)
 {
-    BlockAcctTimedStats *s;
-    int64_t time_ns = qemu_clock_get_ns(clock_type);
-    int64_t latency_ns = time_ns - cookie->start_time_ns;
-
-    if (qtest_enabled()) {
-        latency_ns = qtest_latency_ns;
-    }
-
    assert(cookie->type < BLOCK_MAX_IOTYPE);

    stats->nr_bytes[cookie->type] += cookie->bytes;
    stats->nr_ops[cookie->type]++;
-    stats->total_time_ns[cookie->type] += latency_ns;
-    stats->last_access_time_ns = time_ns;
-
-    QSLIST_FOREACH(s, &stats->intervals, entries) {
-        timed_average_account(&s->latency[cookie->type], latency_ns);
-    }
+    stats->total_time_ns[cookie->type] +=
+        qemu_clock_get_ns(QEMU_CLOCK_REALTIME) - cookie->start_time_ns;
 }

-void block_acct_failed(BlockAcctStats *stats, BlockAcctCookie *cookie)
+
+void block_acct_highest_sector(BlockAcctStats *stats, int64_t sector_num,
+                               unsigned int nb_sectors)
 {
-    assert(cookie->type < BLOCK_MAX_IOTYPE);
-
-    stats->failed_ops[cookie->type]++;
-
-    if (stats->account_failed) {
-        BlockAcctTimedStats *s;
-        int64_t time_ns = qemu_clock_get_ns(clock_type);
-        int64_t latency_ns = time_ns - cookie->start_time_ns;
-
-        if (qtest_enabled()) {
-            latency_ns = qtest_latency_ns;
-        }
-
-        stats->total_time_ns[cookie->type] += latency_ns;
-        stats->last_access_time_ns = time_ns;
-
-        QSLIST_FOREACH(s, &stats->intervals, entries) {
-            timed_average_account(&s->latency[cookie->type], latency_ns);
-        }
-    }
-}
-
-void block_acct_invalid(BlockAcctStats *stats, enum BlockAcctType type)
-{
-    assert(type < BLOCK_MAX_IOTYPE);
-
-    /* block_acct_done() and block_acct_failed() update
-     * total_time_ns[], but this one does not. The reason is that
-     * invalid requests are accounted during their submission,
-     * therefore there's no actual I/O involved. */
-
-    stats->invalid_ops[type]++;
-
-    if (stats->account_invalid) {
-        stats->last_access_time_ns = qemu_clock_get_ns(clock_type);
+    if (stats->wr_highest_sector < sector_num + nb_sectors - 1) {
+        stats->wr_highest_sector = sector_num + nb_sectors - 1;
    }
 }

@@ -154,20 +61,3 @@ void block_acct_merge_done(BlockAcctStats *stats, enum BlockAcctType type,
    assert(type < BLOCK_MAX_IOTYPE);
    stats->merged[type] += num_requests;
 }
-
-int64_t block_acct_idle_time_ns(BlockAcctStats *stats)
-{
-    return qemu_clock_get_ns(clock_type) - stats->last_access_time_ns;
-}
-
-double block_acct_queue_depth(BlockAcctTimedStats *stats,
-                              enum BlockAcctType type)
-{
-    uint64_t sum, elapsed;
-
-    assert(type < BLOCK_MAX_IOTYPE);
-
-    sum = timed_average_sum(&stats->latency[type], &elapsed);
-
-    return (double) sum / elapsed;
-}
@@ -11,27 +11,33 @@
 *
 */

-#include "qemu/osdep.h"
+#include <stdio.h>
+#include <errno.h>
+#include <unistd.h>

 #include "trace.h"
 #include "block/block.h"
 #include "block/block_int.h"
-#include "block/blockjob_int.h"
-#include "block/block_backup.h"
-#include "qapi/error.h"
+#include "block/blockjob.h"
 #include "qapi/qmp/qerror.h"
 #include "qemu/ratelimit.h"
-#include "qemu/cutils.h"
-#include "sysemu/block-backend.h"
-#include "qemu/bitmap.h"
-#include "qemu/error-report.h"

-#define BACKUP_CLUSTER_SIZE_DEFAULT (1 << 16)
+#define BACKUP_CLUSTER_BITS 16
+#define BACKUP_CLUSTER_SIZE (1 << BACKUP_CLUSTER_BITS)
+#define BACKUP_SECTORS_PER_CLUSTER (BACKUP_CLUSTER_SIZE / BDRV_SECTOR_SIZE)
+
 #define SLICE_TIME 100000000ULL /* ns */

+typedef struct CowRequest {
+    int64_t start;
+    int64_t end;
+    QLIST_ENTRY(CowRequest) list;
+    CoQueue wait_queue; /* coroutines blocked on this request */
+} CowRequest;
+
 typedef struct BackupBlockJob {
    BlockJob common;
-    BlockBackend *target;
+    BlockDriverState *target;
    /* bitmap for sync=incremental */
    BdrvDirtyBitmap *sync_bitmap;
    MirrorSyncMode sync_mode;
@@ -40,19 +46,10 @@ typedef struct BackupBlockJob {
    BlockdevOnError on_target_error;
    CoRwlock flush_rwlock;
    uint64_t sectors_read;
-    unsigned long *done_bitmap;
-    int64_t cluster_size;
-    bool compress;
-    NotifierWithReturn before_write;
+    HBitmap *bitmap;
    QLIST_HEAD(, CowRequest) inflight_reqs;
 } BackupBlockJob;

-/* Size of a cluster in sectors, instead of bytes. */
-static inline int64_t cluster_size_sectors(BackupBlockJob *job)
-{
-  return job->cluster_size / BDRV_SECTOR_SIZE;
-}
-
 /* See if in-flight requests overlap and wait for them to complete */
 static void coroutine_fn wait_for_overlapping_requests(BackupBlockJob *job,
                                                       int64_t start,
@@ -65,7 +62,7 @@ static void coroutine_fn wait_for_overlapping_requests(BackupBlockJob *job,
        retry = false;
        QLIST_FOREACH(req, &job->inflight_reqs, list) {
            if (end > req->start && start < req->end) {
-                qemu_co_queue_wait(&req->wait_queue, NULL);
+                qemu_co_queue_wait(&req->wait_queue);
                retry = true;
                break;
            }
@@ -90,25 +87,23 @@ static void cow_request_end(CowRequest *req)
    qemu_co_queue_restart_all(&req->wait_queue);
 }

-static int coroutine_fn backup_do_cow(BackupBlockJob *job,
+static int coroutine_fn backup_do_cow(BlockDriverState *bs,
                                      int64_t sector_num, int nb_sectors,
-                                      bool *error_is_read,
-                                      bool is_write_notifier)
+                                      bool *error_is_read)
 {
-    BlockBackend *blk = job->common.blk;
+    BackupBlockJob *job = (BackupBlockJob *)bs->job;
    CowRequest cow_request;
    struct iovec iov;
    QEMUIOVector bounce_qiov;
    void *bounce_buffer = NULL;
    int ret = 0;
-    int64_t sectors_per_cluster = cluster_size_sectors(job);
    int64_t start, end;
    int n;

    qemu_co_rwlock_rdlock(&job->flush_rwlock);

-    start = sector_num / sectors_per_cluster;
-    end = DIV_ROUND_UP(sector_num + nb_sectors, sectors_per_cluster);
+    start = sector_num / BACKUP_SECTORS_PER_CLUSTER;
+    end = DIV_ROUND_UP(sector_num + nb_sectors, BACKUP_SECTORS_PER_CLUSTER);

    trace_backup_do_cow_enter(job, start, sector_num, nb_sectors);

@@ -116,27 +111,26 @@ static int coroutine_fn backup_do_cow(BackupBlockJob *job,
    cow_request_begin(&cow_request, job, start, end);

    for (; start < end; start++) {
-        if (test_bit(start, job->done_bitmap)) {
+        if (hbitmap_get(job->bitmap, start)) {
            trace_backup_do_cow_skip(job, start);
            continue; /* already copied */
        }

        trace_backup_do_cow_process(job, start);

-        n = MIN(sectors_per_cluster,
+        n = MIN(BACKUP_SECTORS_PER_CLUSTER,
                job->common.len / BDRV_SECTOR_SIZE -
-                start * sectors_per_cluster);
+                start * BACKUP_SECTORS_PER_CLUSTER);

        if (!bounce_buffer) {
-            bounce_buffer = blk_blockalign(blk, job->cluster_size);
+            bounce_buffer = qemu_blockalign(bs, BACKUP_CLUSTER_SIZE);
        }
        iov.iov_base = bounce_buffer;
        iov.iov_len = n * BDRV_SECTOR_SIZE;
        qemu_iovec_init_external(&bounce_qiov, &iov, 1);

-        ret = blk_co_preadv(blk, start * job->cluster_size,
-                            bounce_qiov.size, &bounce_qiov,
-                            is_write_notifier ? BDRV_REQ_NO_SERIALISING : 0);
+        ret = bdrv_co_readv(bs, start * BACKUP_SECTORS_PER_CLUSTER, n,
+                            &bounce_qiov);
        if (ret < 0) {
            trace_backup_do_cow_read_fail(job, start, ret);
            if (error_is_read) {
@@ -146,12 +140,13 @@ static int coroutine_fn backup_do_cow(BackupBlockJob *job,
        }

        if (buffer_is_zero(iov.iov_base, iov.iov_len)) {
-            ret = blk_co_pwrite_zeroes(job->target, start * job->cluster_size,
-                                       bounce_qiov.size, BDRV_REQ_MAY_UNMAP);
+            ret = bdrv_co_write_zeroes(job->target,
+                                       start * BACKUP_SECTORS_PER_CLUSTER,
+                                       n, BDRV_REQ_MAY_UNMAP);
        } else {
-            ret = blk_co_pwritev(job->target, start * job->cluster_size,
-                                 bounce_qiov.size, &bounce_qiov,
-                                 job->compress ? BDRV_REQ_WRITE_COMPRESSED : 0);
+            ret = bdrv_co_writev(job->target,
+                                 start * BACKUP_SECTORS_PER_CLUSTER, n,
+                                 &bounce_qiov);
        }
        if (ret < 0) {
            trace_backup_do_cow_write_fail(job, start, ret);
@@ -161,7 +156,7 @@ static int coroutine_fn backup_do_cow(BackupBlockJob *job,
            goto out;
        }

-        set_bit(start, job->done_bitmap);
+        hbitmap_set(job->bitmap, start, 1);

        /* Publish progress, guest I/O counts as progress too.  Note that the
         * offset field is an opaque progress value, it is not a disk offset.
@@ -188,16 +183,14 @@ static int coroutine_fn backup_before_write_notify(
        NotifierWithReturn *notifier,
        void *opaque)
 {
-    BackupBlockJob *job = container_of(notifier, BackupBlockJob, before_write);
    BdrvTrackedRequest *req = opaque;
    int64_t sector_num = req->offset >> BDRV_SECTOR_BITS;
    int nb_sectors = req->bytes >> BDRV_SECTOR_BITS;

-    assert(req->bs == blk_bs(job->common.blk));
    assert((req->offset & (BDRV_SECTOR_SIZE - 1)) == 0);
    assert((req->bytes & (BDRV_SECTOR_SIZE - 1)) == 0);

-    return backup_do_cow(job, sector_num, nb_sectors, NULL, true);
+    return backup_do_cow(req->bs, sector_num, nb_sectors, NULL);
 }

 static void backup_set_speed(BlockJob *job, int64_t speed, Error **errp)
@@ -211,128 +204,29 @@ static void backup_set_speed(BlockJob *job, int64_t speed, Error **errp)
    ratelimit_set_speed(&s->limit, speed / BDRV_SECTOR_SIZE, SLICE_TIME);
 }

-static void backup_cleanup_sync_bitmap(BackupBlockJob *job, int ret)
-{
-    BdrvDirtyBitmap *bm;
-    BlockDriverState *bs = blk_bs(job->common.blk);
-
-    if (ret < 0 || block_job_is_cancelled(&job->common)) {
-        /* Merge the successor back into the parent, delete nothing. */
-        bm = bdrv_reclaim_dirty_bitmap(bs, job->sync_bitmap, NULL);
-        assert(bm);
-    } else {
-        /* Everything is fine, delete this bitmap and install the backup. */
-        bm = bdrv_dirty_bitmap_abdicate(bs, job->sync_bitmap, NULL);
-        assert(bm);
-    }
-}
-
-static void backup_commit(BlockJob *job)
-{
-    BackupBlockJob *s = container_of(job, BackupBlockJob, common);
-    if (s->sync_bitmap) {
-        backup_cleanup_sync_bitmap(s, 0);
-    }
-}
-
-static void backup_abort(BlockJob *job)
-{
-    BackupBlockJob *s = container_of(job, BackupBlockJob, common);
-    if (s->sync_bitmap) {
-        backup_cleanup_sync_bitmap(s, -1);
-    }
-}
-
-static void backup_clean(BlockJob *job)
-{
-    BackupBlockJob *s = container_of(job, BackupBlockJob, common);
-    assert(s->target);
-    blk_unref(s->target);
-    s->target = NULL;
-}
-
-static void backup_attached_aio_context(BlockJob *job, AioContext *aio_context)
+static void backup_iostatus_reset(BlockJob *job)
 {
    BackupBlockJob *s = container_of(job, BackupBlockJob, common);

-    blk_set_aio_context(s->target, aio_context);
+    bdrv_iostatus_reset(s->target);
 }

-void backup_do_checkpoint(BlockJob *job, Error **errp)
-{
-    BackupBlockJob *backup_job = container_of(job, BackupBlockJob, common);
-    int64_t len;
-
-    assert(job->driver->job_type == BLOCK_JOB_TYPE_BACKUP);
-
-    if (backup_job->sync_mode != MIRROR_SYNC_MODE_NONE) {
-        error_setg(errp, "The backup job only supports block checkpoint in"
-                   " sync=none mode");
-        return;
-    }
-
-    len = DIV_ROUND_UP(backup_job->common.len, backup_job->cluster_size);
-    bitmap_zero(backup_job->done_bitmap, len);
-}
-
-void backup_wait_for_overlapping_requests(BlockJob *job, int64_t sector_num,
-                                          int nb_sectors)
-{
-    BackupBlockJob *backup_job = container_of(job, BackupBlockJob, common);
-    int64_t sectors_per_cluster = cluster_size_sectors(backup_job);
-    int64_t start, end;
-
-    assert(job->driver->job_type == BLOCK_JOB_TYPE_BACKUP);
-
-    start = sector_num / sectors_per_cluster;
-    end = DIV_ROUND_UP(sector_num + nb_sectors, sectors_per_cluster);
-    wait_for_overlapping_requests(backup_job, start, end);
-}
-
-void backup_cow_request_begin(CowRequest *req, BlockJob *job,
-                              int64_t sector_num,
-                              int nb_sectors)
-{
-    BackupBlockJob *backup_job = container_of(job, BackupBlockJob, common);
-    int64_t sectors_per_cluster = cluster_size_sectors(backup_job);
-    int64_t start, end;
-
-    assert(job->driver->job_type == BLOCK_JOB_TYPE_BACKUP);
-
-    start = sector_num / sectors_per_cluster;
-    end = DIV_ROUND_UP(sector_num + nb_sectors, sectors_per_cluster);
-    cow_request_begin(req, backup_job, start, end);
-}
-
-void backup_cow_request_end(CowRequest *req)
-{
-    cow_request_end(req);
-}
-
-static void backup_drain(BlockJob *job)
-{
-    BackupBlockJob *s = container_of(job, BackupBlockJob, common);
-
-    /* Need to keep a reference in case blk_drain triggers execution
-     * of backup_complete...
-     */
-    if (s->target) {
-        BlockBackend *target = s->target;
-        blk_ref(target);
-        blk_drain(target);
-        blk_unref(target);
-    }
-}
+static const BlockJobDriver backup_job_driver = {
+    .instance_size  = sizeof(BackupBlockJob),
+    .job_type       = BLOCK_JOB_TYPE_BACKUP,
+    .set_speed      = backup_set_speed,
+    .iostatus_reset = backup_iostatus_reset,
+};

 static BlockErrorAction backup_error_action(BackupBlockJob *job,
                                            bool read, int error)
 {
    if (read) {
-        return block_job_error_action(&job->common, job->on_source_error,
-                                      true, error);
+        return block_job_error_action(&job->common, job->common.bs,
+                                      job->on_source_error, true, error);
    } else {
-        return block_job_error_action(&job->common, job->on_target_error,
-                                      false, error);
+        return block_job_error_action(&job->common, job->target,
+                                      job->on_target_error, false, error);
    }
 }

@@ -342,8 +236,11 @@ typedef struct {

 static void backup_complete(BlockJob *job, void *opaque)
 {
+    BackupBlockJob *s = container_of(job, BackupBlockJob, common);
    BackupCompleteData *data = opaque;

+    bdrv_unref(s->target);
+
    block_job_completed(job, data->ret);
    g_free(data);
 }
@@ -383,56 +280,53 @@ static int coroutine_fn backup_run_incremental(BackupBlockJob *job)
    int64_t cluster;
    int64_t end;
    int64_t last_cluster = -1;
-    int64_t sectors_per_cluster = cluster_size_sectors(job);
-    BdrvDirtyBitmapIter *dbi;
+    BlockDriverState *bs = job->common.bs;
+    HBitmapIter hbi;

    granularity = bdrv_dirty_bitmap_granularity(job->sync_bitmap);
-    clusters_per_iter = MAX((granularity / job->cluster_size), 1);
-    dbi = bdrv_dirty_iter_new(job->sync_bitmap, 0);
+    clusters_per_iter = MAX((granularity / BACKUP_CLUSTER_SIZE), 1);
+    bdrv_dirty_iter_init(job->sync_bitmap, &hbi);

    /* Find the next dirty sector(s) */
-    while ((sector = bdrv_dirty_iter_next(dbi)) != -1) {
-        cluster = sector / sectors_per_cluster;
+    while ((sector = hbitmap_iter_next(&hbi)) != -1) {
+        cluster = sector / BACKUP_SECTORS_PER_CLUSTER;

        /* Fake progress updates for any clusters we skipped */
        if (cluster != last_cluster + 1) {
            job->common.offset += ((cluster - last_cluster - 1) *
-                                   job->cluster_size);
+                                   BACKUP_CLUSTER_SIZE);
        }

        for (end = cluster + clusters_per_iter; cluster < end; cluster++) {
            do {
                if (yield_and_check(job)) {
-                    goto out;
+                    return ret;
                }
-                ret = backup_do_cow(job, cluster * sectors_per_cluster,
-                                    sectors_per_cluster, &error_is_read,
-                                    false);
+                ret = backup_do_cow(bs, cluster * BACKUP_SECTORS_PER_CLUSTER,
+                                    BACKUP_SECTORS_PER_CLUSTER, &error_is_read);
                if ((ret < 0) &&
                    backup_error_action(job, error_is_read, -ret) ==
                    BLOCK_ERROR_ACTION_REPORT) {
-                    goto out;
+                    return ret;
                }
            } while (ret < 0);
        }

        /* If the bitmap granularity is smaller than the backup granularity,
         * we need to advance the iterator pointer to the next cluster. */
-        if (granularity < job->cluster_size) {
-            bdrv_set_dirty_iter(dbi, cluster * sectors_per_cluster);
+        if (granularity < BACKUP_CLUSTER_SIZE) {
+            bdrv_set_dirty_iter(&hbi, cluster * BACKUP_SECTORS_PER_CLUSTER);
        }

        last_cluster = cluster - 1;
    }

    /* Play some final catchup with the progress meter */
-    end = DIV_ROUND_UP(job->common.len, job->cluster_size);
+    end = DIV_ROUND_UP(job->common.len, BACKUP_CLUSTER_SIZE);
    if (last_cluster + 1 < end) {
-        job->common.offset += ((end - last_cluster - 1) * job->cluster_size);
+        job->common.offset += ((end - last_cluster - 1) * BACKUP_CLUSTER_SIZE);
    }

-out:
-    bdrv_dirty_iter_free(dbi);
    return ret;
 }

@@ -440,27 +334,36 @@ static void coroutine_fn backup_run(void *opaque)
 {
    BackupBlockJob *job = opaque;
    BackupCompleteData *data;
-    BlockDriverState *bs = blk_bs(job->common.blk);
+    BlockDriverState *bs = job->common.bs;
+    BlockDriverState *target = job->target;
+    BlockdevOnError on_target_error = job->on_target_error;
+    NotifierWithReturn before_write = {
+        .notify = backup_before_write_notify,
+    };
    int64_t start, end;
-    int64_t sectors_per_cluster = cluster_size_sectors(job);
    int ret = 0;

    QLIST_INIT(&job->inflight_reqs);
    qemu_co_rwlock_init(&job->flush_rwlock);

    start = 0;
-    end = DIV_ROUND_UP(job->common.len, job->cluster_size);
+    end = DIV_ROUND_UP(job->common.len, BACKUP_CLUSTER_SIZE);

-    job->done_bitmap = bitmap_new(end);
+    job->bitmap = hbitmap_alloc(end, 0);

-    job->before_write.notify = backup_before_write_notify;
-    bdrv_add_before_write_notifier(bs, &job->before_write);
+    bdrv_set_enable_write_cache(target, true);
+    bdrv_set_on_error(target, on_target_error, on_target_error);
+    bdrv_iostatus_enable(target);
+
+    bdrv_add_before_write_notifier(bs, &before_write);

    if (job->sync_mode == MIRROR_SYNC_MODE_NONE) {
        while (!block_job_is_cancelled(&job->common)) {
            /* Yield until the job is cancelled.  We just let our before_write
             * notify callback service CoW requests. */
-            block_job_yield(&job->common);
+            job->common.busy = false;
+            qemu_coroutine_yield();
+            job->common.busy = true;
        }
    } else if (job->sync_mode == MIRROR_SYNC_MODE_INCREMENTAL) {
        ret = backup_run_incremental(job);
@@ -468,19 +371,18 @@ static void coroutine_fn backup_run(void *opaque)
        /* Both FULL and TOP SYNC_MODE's require copying.. */
        for (; start < end; start++) {
            bool error_is_read;
-            int alloced = 0;
-
            if (yield_and_check(job)) {
                break;
            }

            if (job->sync_mode == MIRROR_SYNC_MODE_TOP) {
                int i, n;
+                int alloced = 0;

                /* Check to see if these blocks are already in the
                 * backing file. */

-                for (i = 0; i < sectors_per_cluster;) {
+                for (i = 0; i < BACKUP_SECTORS_PER_CLUSTER;) {
                    /* bdrv_is_allocated() only returns true/false based
                     * on the first set of sectors it comes across that
                     * are are all in the same state.
@@ -489,11 +391,11 @@ static void coroutine_fn backup_run(void *opaque)
                     * needed but at some point that is always the case. */
                    alloced =
                        bdrv_is_allocated(bs,
-                                start * sectors_per_cluster + i,
-                                sectors_per_cluster - i, &n);
+                                start * BACKUP_SECTORS_PER_CLUSTER + i,
+                                BACKUP_SECTORS_PER_CLUSTER - i, &n);
                    i += n;

-                    if (alloced || n == 0) {
+                    if (alloced == 1 || n == 0) {
                        break;
                    }
                }
@@ -505,13 +407,8 @@ static void coroutine_fn backup_run(void *opaque)
                }
            }
            /* FULL sync mode we copy the whole drive. */
-            if (alloced < 0) {
-                ret = alloced;
-            } else {
-                ret = backup_do_cow(job, start * sectors_per_cluster,
-                                    sectors_per_cluster, &error_is_read,
-                                    false);
-            }
+            ret = backup_do_cow(bs, start * BACKUP_SECTORS_PER_CLUSTER,
+                    BACKUP_SECTORS_PER_CLUSTER, &error_is_read);
            if (ret < 0) {
                /* Depending on error action, fail now or retry cluster */
                BlockErrorAction action =
@@ -526,96 +423,97 @@ static void coroutine_fn backup_run(void *opaque)
        }
    }

-    notifier_with_return_remove(&job->before_write);
+    notifier_with_return_remove(&before_write);

    /* wait until pending backup_do_cow() calls have completed */
    qemu_co_rwlock_wrlock(&job->flush_rwlock);
    qemu_co_rwlock_unlock(&job->flush_rwlock);
-    g_free(job->done_bitmap);
+
+    if (job->sync_bitmap) {
+        BdrvDirtyBitmap *bm;
+        if (ret < 0 || block_job_is_cancelled(&job->common)) {
+            /* Merge the successor back into the parent, delete nothing. */
+            bm = bdrv_reclaim_dirty_bitmap(bs, job->sync_bitmap, NULL);
+            assert(bm);
+        } else {
+            /* Everything is fine, delete this bitmap and install the backup. */
+            bm = bdrv_dirty_bitmap_abdicate(bs, job->sync_bitmap, NULL);
+            assert(bm);
+        }
+    }
+    hbitmap_free(job->bitmap);
+
+    bdrv_iostatus_disable(target);
+    bdrv_op_unblock_all(target, job->common.blocker);

    data = g_malloc(sizeof(*data));
    data->ret = ret;
    block_job_defer_to_main_loop(&job->common, backup_complete, data);
 }

-static const BlockJobDriver backup_job_driver = {
-    .instance_size          = sizeof(BackupBlockJob),
-    .job_type               = BLOCK_JOB_TYPE_BACKUP,
-    .start                  = backup_run,
-    .set_speed              = backup_set_speed,
-    .commit                 = backup_commit,
-    .abort                  = backup_abort,
-    .clean                  = backup_clean,
-    .attached_aio_context   = backup_attached_aio_context,
-    .drain                  = backup_drain,
-};
-
-BlockJob *backup_job_create(const char *job_id, BlockDriverState *bs,
-                  BlockDriverState *target, int64_t speed,
-                  MirrorSyncMode sync_mode, BdrvDirtyBitmap *sync_bitmap,
-                  bool compress,
+void backup_start(BlockDriverState *bs, BlockDriverState *target,
+                  int64_t speed, MirrorSyncMode sync_mode,
+                  BdrvDirtyBitmap *sync_bitmap,
                  BlockdevOnError on_source_error,
                  BlockdevOnError on_target_error,
-                  int creation_flags,
                  BlockCompletionFunc *cb, void *opaque,
-                  BlockJobTxn *txn, Error **errp)
+                  Error **errp)
 {
    int64_t len;
-    BlockDriverInfo bdi;
-    BackupBlockJob *job = NULL;
-    int ret;

    assert(bs);
    assert(target);
+    assert(cb);

    if (bs == target) {
        error_setg(errp, "Source and target cannot be the same");
-        return NULL;
+        return;
+    }
+
+    if ((on_source_error == BLOCKDEV_ON_ERROR_STOP ||
+         on_source_error == BLOCKDEV_ON_ERROR_ENOSPC) &&
+        !bdrv_iostatus_is_enabled(bs)) {
+        error_setg(errp, QERR_INVALID_PARAMETER, "on-source-error");
+        return;
    }

    if (!bdrv_is_inserted(bs)) {
        error_setg(errp, "Device is not inserted: %s",
                   bdrv_get_device_name(bs));
-        return NULL;
+        return;
    }

    if (!bdrv_is_inserted(target)) {
        error_setg(errp, "Device is not inserted: %s",
                   bdrv_get_device_name(target));
-        return NULL;
-    }
-
-    if (compress && target->drv->bdrv_co_pwritev_compressed == NULL) {
-        error_setg(errp, "Compression is not supported for this drive %s",
-                   bdrv_get_device_name(target));
-        return NULL;
+        return;
    }

    if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_BACKUP_SOURCE, errp)) {
-        return NULL;
+        return;
    }

    if (bdrv_op_is_blocked(target, BLOCK_OP_TYPE_BACKUP_TARGET, errp)) {
-        return NULL;
+        return;
    }

    if (sync_mode == MIRROR_SYNC_MODE_INCREMENTAL) {
        if (!sync_bitmap) {
            error_setg(errp, "must provide a valid bitmap name for "
                             "\"incremental\" sync mode");
-            return NULL;
+            return;
        }

        /* Create a new bitmap, and freeze/disable this one. */
        if (bdrv_dirty_bitmap_create_successor(bs, sync_bitmap, errp) < 0) {
-            return NULL;
+            return;
        }
    } else if (sync_bitmap) {
        error_setg(errp,
                   "a sync_bitmap was provided to backup_run, "
                   "but received an incompatible sync_mode (%s)",
                   MirrorSyncMode_lookup[sync_mode]);
-        return NULL;
+        return;
    }

    len = bdrv_getlength(bs);
@@ -625,75 +523,27 @@ BlockJob *backup_job_create(const char *job_id, BlockDriverState *bs,
        goto error;
    }

-    /* job->common.len is fixed, so we can't allow resize */
-    job = block_job_create(job_id, &backup_job_driver, bs,
-                           BLK_PERM_CONSISTENT_READ,
-                           BLK_PERM_CONSISTENT_READ | BLK_PERM_WRITE |
-                           BLK_PERM_WRITE_UNCHANGED | BLK_PERM_GRAPH_MOD,
-                           speed, creation_flags, cb, opaque, errp);
+    BackupBlockJob *job = block_job_create(&backup_job_driver, bs, speed,
+                                           cb, opaque, errp);
    if (!job) {
        goto error;
    }

-    /* The target must match the source in size, so no resize here either */
-    job->target = blk_new(BLK_PERM_WRITE,
-                          BLK_PERM_CONSISTENT_READ | BLK_PERM_WRITE |
-                          BLK_PERM_WRITE_UNCHANGED | BLK_PERM_GRAPH_MOD);
-    ret = blk_insert_bs(job->target, target, errp);
-    if (ret < 0) {
-        goto error;
-    }
+    bdrv_op_block_all(target, job->common.blocker);

    job->on_source_error = on_source_error;
    job->on_target_error = on_target_error;
+    job->target = target;
    job->sync_mode = sync_mode;
    job->sync_bitmap = sync_mode == MIRROR_SYNC_MODE_INCREMENTAL ?
                       sync_bitmap : NULL;
-    job->compress = compress;
-
-    /* If there is no backing file on the target, we cannot rely on COW if our
-     * backup cluster size is smaller than the target cluster size. Even for
-     * targets with a backing file, try to avoid COW if possible. */
-    ret = bdrv_get_info(target, &bdi);
-    if (ret == -ENOTSUP && !target->backing) {
-        /* Cluster size is not defined */
-        error_report("WARNING: The target block device doesn't provide "
-                     "information about the block size and it doesn't have a "
-                     "backing file. The default block size of %u bytes is "
-                     "used. If the actual block size of the target exceeds "
-                     "this default, the backup may be unusable",
-                     BACKUP_CLUSTER_SIZE_DEFAULT);
-        job->cluster_size = BACKUP_CLUSTER_SIZE_DEFAULT;
-    } else if (ret < 0 && !target->backing) {
-        error_setg_errno(errp, -ret,
-            "Couldn't determine the cluster size of the target image, "
-            "which has no backing file");
-        error_append_hint(errp,
-            "Aborting, since this may create an unusable destination image\n");
-        goto error;
-    } else if (ret < 0 && target->backing) {
-        /* Not fatal; just trudge on ahead. */
-        job->cluster_size = BACKUP_CLUSTER_SIZE_DEFAULT;
-    } else {
-        job->cluster_size = MAX(BACKUP_CLUSTER_SIZE_DEFAULT, bdi.cluster_size);
-    }
-
-    /* Required permissions are already taken with target's blk_new() */
-    block_job_add_bdrv(&job->common, "target", target, 0, BLK_PERM_ALL,
-                       &error_abort);
    job->common.len = len;
-    block_job_txn_add_job(txn, &job->common);
-
-    return &job->common;
+    job->common.co = qemu_coroutine_create(backup_run);
+    qemu_coroutine_enter(job->common.co, job);
+    return;

 error:
    if (sync_bitmap) {
        bdrv_reclaim_dirty_bitmap(bs, sync_bitmap, NULL);
    }
-    if (job) {
-        backup_clean(&job->common);
-        block_job_unref(&job->common);
-    }
-
-    return NULL;
 }
@@ -1,7 +1,6 @@
 /*
 * Block protocol for I/O error injection
 *
- * Copyright (C) 2016-2017 Red Hat, Inc.
 * Copyright (c) 2010 Kevin Wolf <kwolf@redhat.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
@@ -23,9 +22,7 @@
 * THE SOFTWARE.
 */

-#include "qemu/osdep.h"
-#include "qapi/error.h"
-#include "qemu/cutils.h"
+#include "qemu-common.h"
 #include "qemu/config-file.h"
 #include "block/block_int.h"
 #include "qemu/module.h"
@@ -33,28 +30,19 @@
 #include "qapi/qmp/qdict.h"
 #include "qapi/qmp/qint.h"
 #include "qapi/qmp/qstring.h"
-#include "sysemu/qtest.h"

 typedef struct BDRVBlkdebugState {
    int state;
    int new_state;
-    uint64_t align;
-    uint64_t max_transfer;
-    uint64_t opt_write_zero;
-    uint64_t max_write_zero;
-    uint64_t opt_discard;
-    uint64_t max_discard;

-    /* For blkdebug_refresh_filename() */
-    char *config_file;
-
-    QLIST_HEAD(, BlkdebugRule) rules[BLKDBG__MAX];
+    QLIST_HEAD(, BlkdebugRule) rules[BLKDBG_EVENT_MAX];
    QSIMPLEQ_HEAD(, BlkdebugRule) active_rules;
    QLIST_HEAD(, BlkdebugSuspendedReq) suspended_reqs;
 } BDRVBlkdebugState;

 typedef struct BlkdebugAIOCB {
    BlockAIOCB common;
+    QEMUBH *bh;
    int ret;
 } BlkdebugAIOCB;

@@ -64,6 +52,10 @@ typedef struct BlkdebugSuspendedReq {
    QLIST_ENTRY(BlkdebugSuspendedReq) next;
 } BlkdebugSuspendedReq;

+static const AIOCBInfo blkdebug_aiocb_info = {
+    .aiocb_size    = sizeof(BlkdebugAIOCB),
+};
+
 enum {
    ACTION_INJECT_ERROR,
    ACTION_SET_STATE,
@@ -71,7 +63,7 @@ enum {
 };

 typedef struct BlkdebugRule {
-    BlkdebugEvent event;
+    BlkDebugEvent event;
    int action;
    int state;
    union {
@@ -79,7 +71,7 @@ typedef struct BlkdebugRule {
            int error;
            int immediately;
            int once;
-            int64_t offset;
+            int64_t sector;
        } inject;
        struct {
            int new_state;
@@ -150,12 +142,69 @@ static QemuOptsList *config_groups[] = {
    NULL
 };

-static int get_event_by_name(const char *name, BlkdebugEvent *event)
+static const char *event_names[BLKDBG_EVENT_MAX] = {
+    [BLKDBG_L1_UPDATE]                      = "l1_update",
+    [BLKDBG_L1_GROW_ALLOC_TABLE]            = "l1_grow.alloc_table",
+    [BLKDBG_L1_GROW_WRITE_TABLE]            = "l1_grow.write_table",
+    [BLKDBG_L1_GROW_ACTIVATE_TABLE]         = "l1_grow.activate_table",
+
+    [BLKDBG_L2_LOAD]                        = "l2_load",
+    [BLKDBG_L2_UPDATE]                      = "l2_update",
+    [BLKDBG_L2_UPDATE_COMPRESSED]           = "l2_update_compressed",
+    [BLKDBG_L2_ALLOC_COW_READ]              = "l2_alloc.cow_read",
+    [BLKDBG_L2_ALLOC_WRITE]                 = "l2_alloc.write",
+
+    [BLKDBG_READ_AIO]                       = "read_aio",
+    [BLKDBG_READ_BACKING_AIO]               = "read_backing_aio",
+    [BLKDBG_READ_COMPRESSED]                = "read_compressed",
+
+    [BLKDBG_WRITE_AIO]                      = "write_aio",
+    [BLKDBG_WRITE_COMPRESSED]               = "write_compressed",
+
+    [BLKDBG_VMSTATE_LOAD]                   = "vmstate_load",
+    [BLKDBG_VMSTATE_SAVE]                   = "vmstate_save",
+
+    [BLKDBG_COW_READ]                       = "cow_read",
+    [BLKDBG_COW_WRITE]                      = "cow_write",
+
+    [BLKDBG_REFTABLE_LOAD]                  = "reftable_load",
+    [BLKDBG_REFTABLE_GROW]                  = "reftable_grow",
+    [BLKDBG_REFTABLE_UPDATE]                = "reftable_update",
+
+    [BLKDBG_REFBLOCK_LOAD]                  = "refblock_load",
+    [BLKDBG_REFBLOCK_UPDATE]                = "refblock_update",
+    [BLKDBG_REFBLOCK_UPDATE_PART]           = "refblock_update_part",
+    [BLKDBG_REFBLOCK_ALLOC]                 = "refblock_alloc",
+    [BLKDBG_REFBLOCK_ALLOC_HOOKUP]          = "refblock_alloc.hookup",
+    [BLKDBG_REFBLOCK_ALLOC_WRITE]           = "refblock_alloc.write",
+    [BLKDBG_REFBLOCK_ALLOC_WRITE_BLOCKS]    = "refblock_alloc.write_blocks",
+    [BLKDBG_REFBLOCK_ALLOC_WRITE_TABLE]     = "refblock_alloc.write_table",
+    [BLKDBG_REFBLOCK_ALLOC_SWITCH_TABLE]    = "refblock_alloc.switch_table",
+
+    [BLKDBG_CLUSTER_ALLOC]                  = "cluster_alloc",
+    [BLKDBG_CLUSTER_ALLOC_BYTES]            = "cluster_alloc_bytes",
+    [BLKDBG_CLUSTER_FREE]                   = "cluster_free",
+
+    [BLKDBG_FLUSH_TO_OS]                    = "flush_to_os",
+    [BLKDBG_FLUSH_TO_DISK]                  = "flush_to_disk",
+
+    [BLKDBG_PWRITEV_RMW_HEAD]               = "pwritev_rmw.head",
+    [BLKDBG_PWRITEV_RMW_AFTER_HEAD]         = "pwritev_rmw.after_head",
+    [BLKDBG_PWRITEV_RMW_TAIL]               = "pwritev_rmw.tail",
+    [BLKDBG_PWRITEV_RMW_AFTER_TAIL]         = "pwritev_rmw.after_tail",
+    [BLKDBG_PWRITEV]                        = "pwritev",
+    [BLKDBG_PWRITEV_ZERO]                   = "pwritev_zero",
+    [BLKDBG_PWRITEV_DONE]                   = "pwritev_done",
+
+    [BLKDBG_EMPTY_IMAGE_PREPARE]            = "empty_image_prepare",
+};
+
+static int get_event_by_name(const char *name, BlkDebugEvent *event)
 {
    int i;

-    for (i = 0; i < BLKDBG__MAX; i++) {
-        if (!strcmp(BlkdebugEvent_lookup[i], name)) {
+    for (i = 0; i < BLKDBG_EVENT_MAX; i++) {
+        if (!strcmp(event_names[i], name)) {
            *event = i;
            return 0;
        }
@@ -174,9 +223,8 @@ static int add_rule(void *opaque, QemuOpts *opts, Error **errp)
    struct add_rule_data *d = opaque;
    BDRVBlkdebugState *s = d->s;
    const char* event_name;
-    BlkdebugEvent event;
+    BlkDebugEvent event;
    struct BlkdebugRule *rule;
-    int64_t sector;

    /* Find the right event for the rule */
    event_name = qemu_opt_get(opts, "event");
@@ -203,9 +251,7 @@ static int add_rule(void *opaque, QemuOpts *opts, Error **errp)
        rule->options.inject.once  = qemu_opt_get_bool(opts, "once", 0);
        rule->options.inject.immediately =
            qemu_opt_get_bool(opts, "immediately", 0);
-        sector = qemu_opt_get_number(opts, "sector", -1);
-        rule->options.inject.offset =
-            sector == -1 ? -1 : sector * BDRV_SECTOR_SIZE;
+        rule->options.inject.sector = qemu_opt_get_number(opts, "sector", -1);
        break;

    case ACTION_SET_STATE:
@@ -307,7 +353,7 @@ static void blkdebug_parse_filename(const char *filename, QDict *options,
    if (!strstart(filename, "blkdebug:", &filename)) {
        /* There was no prefix; therefore, all options have to be already
           present in the QDict (except for the filename) */
-        qdict_put_str(options, "x-image", filename);
+        qdict_put(options, "x-image", qstring_from_str(filename));
        return;
    }

@@ -326,7 +372,7 @@ static void blkdebug_parse_filename(const char *filename, QDict *options,

    /* TODO Allow multi-level nesting and set file.filename here */
    filename = c + 1;
-    qdict_put_str(options, "x-image", filename);
+    qdict_put(options, "x-image", qstring_from_str(filename));
 }

 static QemuOptsList runtime_opts = {
@@ -348,31 +394,6 @@ static QemuOptsList runtime_opts = {
            .type = QEMU_OPT_SIZE,
            .help = "Required alignment in bytes",
        },
-        {
-            .name = "max-transfer",
-            .type = QEMU_OPT_SIZE,
-            .help = "Maximum transfer size in bytes",
-        },
-        {
-            .name = "opt-write-zero",
-            .type = QEMU_OPT_SIZE,
-            .help = "Optimum write zero alignment in bytes",
-        },
-        {
-            .name = "max-write-zero",
-            .type = QEMU_OPT_SIZE,
-            .help = "Maximum write zero size in bytes",
-        },
-        {
-            .name = "opt-discard",
-            .type = QEMU_OPT_SIZE,
-            .help = "Optimum discard alignment in bytes",
-        },
-        {
-            .name = "max-discard",
-            .type = QEMU_OPT_SIZE,
-            .help = "Maximum discard size in bytes",
-        },
        { /* end of list */ }
    },
 };
@@ -383,8 +404,9 @@ static int blkdebug_open(BlockDriverState *bs, QDict *options, int flags,
    BDRVBlkdebugState *s = bs->opaque;
    QemuOpts *opts;
    Error *local_err = NULL;
-    int ret;
+    const char *config;
    uint64_t align;
+    int ret;

    opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort);
    qemu_opts_absorb_qdict(opts, options, &local_err);
@@ -395,8 +417,8 @@ static int blkdebug_open(BlockDriverState *bs, QDict *options, int flags,
    }

    /* Read rules from config file or command line options */
-    s->config_file = g_strdup(qemu_opt_get(opts, "config"));
-    ret = read_config(s, s->config_file, options, errp);
+    config = qemu_opt_get(opts, "config");
+    ret = read_config(s, config, options, errp);
    if (ret) {
        goto out;
    }
@@ -404,243 +426,134 @@ static int blkdebug_open(BlockDriverState *bs, QDict *options, int flags,
    /* Set initial state */
    s->state = 1;

-    /* Open the image file */
-    bs->file = bdrv_open_child(qemu_opt_get(opts, "x-image"), options, "image",
-                               bs, &child_file, false, &local_err);
-    if (local_err) {
-        ret = -EINVAL;
+    /* Open the backing file */
+    assert(bs->file == NULL);
+    ret = bdrv_open_image(&bs->file, qemu_opt_get(opts, "x-image"), options, "image",
+                          bs, &child_file, false, &local_err);
+    if (ret < 0) {
        error_propagate(errp, local_err);
        goto out;
    }

-    bs->supported_write_flags = BDRV_REQ_FUA &
-        bs->file->bs->supported_write_flags;
-    bs->supported_zero_flags = (BDRV_REQ_FUA | BDRV_REQ_MAY_UNMAP) &
-        bs->file->bs->supported_zero_flags;
-    ret = -EINVAL;
-
-    /* Set alignment overrides */
-    s->align = qemu_opt_get_size(opts, "align", 0);
-    if (s->align && (s->align >= INT_MAX || !is_power_of_2(s->align))) {
-        error_setg(errp, "Cannot meet constraints with align %" PRIu64,
-                   s->align);
-        goto out;
-    }
-    align = MAX(s->align, bs->file->bs->bl.request_alignment);
-
-    s->max_transfer = qemu_opt_get_size(opts, "max-transfer", 0);
-    if (s->max_transfer &&
-        (s->max_transfer >= INT_MAX ||
-         !QEMU_IS_ALIGNED(s->max_transfer, align))) {
-        error_setg(errp, "Cannot meet constraints with max-transfer %" PRIu64,
-                   s->max_transfer);
-        goto out;
-    }
-
-    s->opt_write_zero = qemu_opt_get_size(opts, "opt-write-zero", 0);
-    if (s->opt_write_zero &&
-        (s->opt_write_zero >= INT_MAX ||
-         !QEMU_IS_ALIGNED(s->opt_write_zero, align))) {
-        error_setg(errp, "Cannot meet constraints with opt-write-zero %" PRIu64,
-                   s->opt_write_zero);
-        goto out;
-    }
-
-    s->max_write_zero = qemu_opt_get_size(opts, "max-write-zero", 0);
-    if (s->max_write_zero &&
-        (s->max_write_zero >= INT_MAX ||
-         !QEMU_IS_ALIGNED(s->max_write_zero,
-                          MAX(s->opt_write_zero, align)))) {
-        error_setg(errp, "Cannot meet constraints with max-write-zero %" PRIu64,
-                   s->max_write_zero);
-        goto out;
-    }
-
-    s->opt_discard = qemu_opt_get_size(opts, "opt-discard", 0);
-    if (s->opt_discard &&
-        (s->opt_discard >= INT_MAX ||
-         !QEMU_IS_ALIGNED(s->opt_discard, align))) {
-        error_setg(errp, "Cannot meet constraints with opt-discard %" PRIu64,
-                   s->opt_discard);
-        goto out;
-    }
-
-    s->max_discard = qemu_opt_get_size(opts, "max-discard", 0);
-    if (s->max_discard &&
-        (s->max_discard >= INT_MAX ||
-         !QEMU_IS_ALIGNED(s->max_discard,
-                          MAX(s->opt_discard, align)))) {
-        error_setg(errp, "Cannot meet constraints with max-discard %" PRIu64,
-                   s->max_discard);
-        goto out;
+    /* Set request alignment */
+    align = qemu_opt_get_size(opts, "align", bs->request_alignment);
+    if (align > 0 && align < INT_MAX && !(align & (align - 1))) {
+        bs->request_alignment = align;
+    } else {
+        error_setg(errp, "Invalid alignment");
+        ret = -EINVAL;
+        goto fail_unref;
    }

    ret = 0;
+    goto out;
+
+fail_unref:
+    bdrv_unref(bs->file);
 out:
-    if (ret < 0) {
-        g_free(s->config_file);
-    }
    qemu_opts_del(opts);
    return ret;
 }

-static int rule_check(BlockDriverState *bs, uint64_t offset, uint64_t bytes)
+static void error_callback_bh(void *opaque)
+{
+    struct BlkdebugAIOCB *acb = opaque;
+    qemu_bh_delete(acb->bh);
+    acb->common.cb(acb->common.opaque, acb->ret);
+    qemu_aio_unref(acb);
+}
+
+static BlockAIOCB *inject_error(BlockDriverState *bs,
+    BlockCompletionFunc *cb, void *opaque, BlkdebugRule *rule)
 {
    BDRVBlkdebugState *s = bs->opaque;
-    BlkdebugRule *rule = NULL;
-    int error;
-    bool immediately;
-
-    QSIMPLEQ_FOREACH(rule, &s->active_rules, active_next) {
-        uint64_t inject_offset = rule->options.inject.offset;
-
-        if (inject_offset == -1 ||
-            (bytes && inject_offset >= offset &&
-             inject_offset < offset + bytes))
-        {
-            break;
-        }
-    }
-
-    if (!rule || !rule->options.inject.error) {
-        return 0;
-    }
-
-    immediately = rule->options.inject.immediately;
-    error = rule->options.inject.error;
+    int error = rule->options.inject.error;
+    struct BlkdebugAIOCB *acb;
+    QEMUBH *bh;
+    bool immediately = rule->options.inject.immediately;

    if (rule->options.inject.once) {
        QSIMPLEQ_REMOVE(&s->active_rules, rule, BlkdebugRule, active_next);
        remove_rule(rule);
    }

-    if (!immediately) {
-        aio_co_schedule(qemu_get_current_aio_context(), qemu_coroutine_self());
-        qemu_coroutine_yield();
+    if (immediately) {
+        return NULL;
    }

-    return -error;
+    acb = qemu_aio_get(&blkdebug_aiocb_info, bs, cb, opaque);
+    acb->ret = -error;
+
+    bh = aio_bh_new(bdrv_get_aio_context(bs), error_callback_bh, acb);
+    acb->bh = bh;
+    qemu_bh_schedule(bh);
+
+    return &acb->common;
 }

-static int coroutine_fn
-blkdebug_co_preadv(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
-                   QEMUIOVector *qiov, int flags)
+static BlockAIOCB *blkdebug_aio_readv(BlockDriverState *bs,
+    int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
+    BlockCompletionFunc *cb, void *opaque)
 {
-    int err;
+    BDRVBlkdebugState *s = bs->opaque;
+    BlkdebugRule *rule = NULL;

-    /* Sanity check block layer guarantees */
-    assert(QEMU_IS_ALIGNED(offset, bs->bl.request_alignment));
-    assert(QEMU_IS_ALIGNED(bytes, bs->bl.request_alignment));
-    if (bs->bl.max_transfer) {
-        assert(bytes <= bs->bl.max_transfer);
+    QSIMPLEQ_FOREACH(rule, &s->active_rules, active_next) {
+        if (rule->options.inject.sector == -1 ||
+            (rule->options.inject.sector >= sector_num &&
+             rule->options.inject.sector < sector_num + nb_sectors)) {
+            break;
+        }
    }

-    err = rule_check(bs, offset, bytes);
-    if (err) {
-        return err;
+    if (rule && rule->options.inject.error) {
+        return inject_error(bs, cb, opaque, rule);
    }

-    return bdrv_co_preadv(bs->file, offset, bytes, qiov, flags);
+    return bdrv_aio_readv(bs->file, sector_num, qiov, nb_sectors, cb, opaque);
 }

-static int coroutine_fn
-blkdebug_co_pwritev(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
-                    QEMUIOVector *qiov, int flags)
+static BlockAIOCB *blkdebug_aio_writev(BlockDriverState *bs,
+    int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
+    BlockCompletionFunc *cb, void *opaque)
 {
-    int err;
+    BDRVBlkdebugState *s = bs->opaque;
+    BlkdebugRule *rule = NULL;

-    /* Sanity check block layer guarantees */
-    assert(QEMU_IS_ALIGNED(offset, bs->bl.request_alignment));
-    assert(QEMU_IS_ALIGNED(bytes, bs->bl.request_alignment));
-    if (bs->bl.max_transfer) {
-        assert(bytes <= bs->bl.max_transfer);
+    QSIMPLEQ_FOREACH(rule, &s->active_rules, active_next) {
+        if (rule->options.inject.sector == -1 ||
+            (rule->options.inject.sector >= sector_num &&
+             rule->options.inject.sector < sector_num + nb_sectors)) {
+            break;
+        }
    }

-    err = rule_check(bs, offset, bytes);
-    if (err) {
-        return err;
+    if (rule && rule->options.inject.error) {
+        return inject_error(bs, cb, opaque, rule);
    }

-    return bdrv_co_pwritev(bs->file, offset, bytes, qiov, flags);
+    return bdrv_aio_writev(bs->file, sector_num, qiov, nb_sectors, cb, opaque);
 }

-static int blkdebug_co_flush(BlockDriverState *bs)
+static BlockAIOCB *blkdebug_aio_flush(BlockDriverState *bs,
+    BlockCompletionFunc *cb, void *opaque)
 {
-    int err = rule_check(bs, 0, 0);
+    BDRVBlkdebugState *s = bs->opaque;
+    BlkdebugRule *rule = NULL;

-    if (err) {
-        return err;
+    QSIMPLEQ_FOREACH(rule, &s->active_rules, active_next) {
+        if (rule->options.inject.sector == -1) {
+            break;
+        }
    }

-    return bdrv_co_flush(bs->file->bs);
+    if (rule && rule->options.inject.error) {
+        return inject_error(bs, cb, opaque, rule);
+    }
+
+    return bdrv_aio_flush(bs->file, cb, opaque);
 }

-static int coroutine_fn blkdebug_co_pwrite_zeroes(BlockDriverState *bs,
-                                                  int64_t offset, int count,
-                                                  BdrvRequestFlags flags)
-{
-    uint32_t align = MAX(bs->bl.request_alignment,
-                         bs->bl.pwrite_zeroes_alignment);
-    int err;
-
-    /* Only pass through requests that are larger than requested
-     * preferred alignment (so that we test the fallback to writes on
-     * unaligned portions), and check that the block layer never hands
-     * us anything unaligned that crosses an alignment boundary.  */
-    if (count < align) {
-        assert(QEMU_IS_ALIGNED(offset, align) ||
-               QEMU_IS_ALIGNED(offset + count, align) ||
-               DIV_ROUND_UP(offset, align) ==
-               DIV_ROUND_UP(offset + count, align));
-        return -ENOTSUP;
-    }
-    assert(QEMU_IS_ALIGNED(offset, align));
-    assert(QEMU_IS_ALIGNED(count, align));
-    if (bs->bl.max_pwrite_zeroes) {
-        assert(count <= bs->bl.max_pwrite_zeroes);
-    }
-
-    err = rule_check(bs, offset, count);
-    if (err) {
-        return err;
-    }
-
-    return bdrv_co_pwrite_zeroes(bs->file, offset, count, flags);
-}
-
-static int coroutine_fn blkdebug_co_pdiscard(BlockDriverState *bs,
-                                             int64_t offset, int count)
-{
-    uint32_t align = bs->bl.pdiscard_alignment;
-    int err;
-
-    /* Only pass through requests that are larger than requested
-     * minimum alignment, and ensure that unaligned requests do not
-     * cross optimum discard boundaries. */
-    if (count < bs->bl.request_alignment) {
-        assert(QEMU_IS_ALIGNED(offset, align) ||
-               QEMU_IS_ALIGNED(offset + count, align) ||
-               DIV_ROUND_UP(offset, align) ==
-               DIV_ROUND_UP(offset + count, align));
-        return -ENOTSUP;
-    }
-    assert(QEMU_IS_ALIGNED(offset, bs->bl.request_alignment));
-    assert(QEMU_IS_ALIGNED(count, bs->bl.request_alignment));
-    if (align && count >= align) {
-        assert(QEMU_IS_ALIGNED(offset, align));
-        assert(QEMU_IS_ALIGNED(count, align));
-    }
-    if (bs->bl.max_pdiscard) {
-        assert(count <= bs->bl.max_pdiscard);
-    }
-
-    err = rule_check(bs, offset, count);
-    if (err) {
-        return err;
-    }
-
-    return bdrv_co_pdiscard(bs->file->bs, offset, count);
-}

 static void blkdebug_close(BlockDriverState *bs)
 {
@@ -648,13 +561,11 @@ static void blkdebug_close(BlockDriverState *bs)
    BlkdebugRule *rule, *next;
    int i;

-    for (i = 0; i < BLKDBG__MAX; i++) {
+    for (i = 0; i < BLKDBG_EVENT_MAX; i++) {
        QLIST_FOREACH_SAFE(rule, &s->rules[i], next, next) {
            remove_rule(rule);
        }
    }
-
-    g_free(s->config_file);
 }

 static void suspend_request(BlockDriverState *bs, BlkdebugRule *rule)
@@ -670,13 +581,9 @@ static void suspend_request(BlockDriverState *bs, BlkdebugRule *rule)
    remove_rule(rule);
    QLIST_INSERT_HEAD(&s->suspended_reqs, &r, next);

-    if (!qtest_enabled()) {
-        printf("blkdebug: Suspended request '%s'\n", r.tag);
-    }
+    printf("blkdebug: Suspended request '%s'\n", r.tag);
    qemu_coroutine_yield();
-    if (!qtest_enabled()) {
-        printf("blkdebug: Resuming request '%s'\n", r.tag);
-    }
+    printf("blkdebug: Resuming request '%s'\n", r.tag);

    QLIST_REMOVE(&r, next);
    g_free(r.tag);
@@ -713,13 +620,13 @@ static bool process_rule(BlockDriverState *bs, struct BlkdebugRule *rule,
    return injected;
 }

-static void blkdebug_debug_event(BlockDriverState *bs, BlkdebugEvent event)
+static void blkdebug_debug_event(BlockDriverState *bs, BlkDebugEvent event)
 {
    BDRVBlkdebugState *s = bs->opaque;
    struct BlkdebugRule *rule, *next;
    bool injected;

-    assert((int)event >= 0 && event < BLKDBG__MAX);
+    assert((int)event >= 0 && event < BLKDBG_EVENT_MAX);

    injected = false;
    s->new_state = s->state;
@@ -734,7 +641,7 @@ static int blkdebug_debug_breakpoint(BlockDriverState *bs, const char *event,
 {
    BDRVBlkdebugState *s = bs->opaque;
    struct BlkdebugRule *rule;
-    BlkdebugEvent blkdebug_event;
+    BlkDebugEvent blkdebug_event;

    if (get_event_by_name(event, &blkdebug_event) < 0) {
        return -ENOENT;
@@ -761,7 +668,7 @@ static int blkdebug_debug_resume(BlockDriverState *bs, const char *tag)

    QLIST_FOREACH_SAFE(r, &s->suspended_reqs, next, next) {
        if (!strcmp(r->tag, tag)) {
-            qemu_coroutine_enter(r->co);
+            qemu_coroutine_enter(r->co, NULL);
            return 0;
        }
    }
@@ -776,7 +683,7 @@ static int blkdebug_debug_remove_breakpoint(BlockDriverState *bs,
    BlkdebugRule *rule, *next;
    int i, ret = -ENOENT;

-    for (i = 0; i < BLKDBG__MAX; i++) {
+    for (i = 0; i < BLKDBG_EVENT_MAX; i++) {
        QLIST_FOREACH_SAFE(rule, &s->rules[i], next, next) {
            if (rule->action == ACTION_SUSPEND &&
                !strcmp(rule->options.suspend.tag, tag)) {
@@ -787,7 +694,7 @@ static int blkdebug_debug_remove_breakpoint(BlockDriverState *bs,
    }
    QLIST_FOREACH_SAFE(r, &s->suspended_reqs, next, r_next) {
        if (!strcmp(r->tag, tag)) {
-            qemu_coroutine_enter(r->co);
+            qemu_coroutine_enter(r->co, NULL);
            ret = 0;
        }
    }
@@ -809,54 +716,55 @@ static bool blkdebug_debug_is_suspended(BlockDriverState *bs, const char *tag)

 static int64_t blkdebug_getlength(BlockDriverState *bs)
 {
-    return bdrv_getlength(bs->file->bs);
+    return bdrv_getlength(bs->file);
 }

 static int blkdebug_truncate(BlockDriverState *bs, int64_t offset)
 {
-    return bdrv_truncate(bs->file, offset, NULL);
+    return bdrv_truncate(bs->file, offset);
 }

-static void blkdebug_refresh_filename(BlockDriverState *bs, QDict *options)
+static void blkdebug_refresh_filename(BlockDriverState *bs)
 {
-    BDRVBlkdebugState *s = bs->opaque;
    QDict *opts;
    const QDictEntry *e;
    bool force_json = false;

-    for (e = qdict_first(options); e; e = qdict_next(options, e)) {
+    for (e = qdict_first(bs->options); e; e = qdict_next(bs->options, e)) {
        if (strcmp(qdict_entry_key(e), "config") &&
-            strcmp(qdict_entry_key(e), "x-image"))
+            strcmp(qdict_entry_key(e), "x-image") &&
+            strcmp(qdict_entry_key(e), "image") &&
+            strncmp(qdict_entry_key(e), "image.", strlen("image.")))
        {
            force_json = true;
            break;
        }
    }

-    if (force_json && !bs->file->bs->full_open_options) {
+    if (force_json && !bs->file->full_open_options) {
        /* The config file cannot be recreated, so creating a plain filename
         * is impossible */
        return;
    }

-    if (!force_json && bs->file->bs->exact_filename[0]) {
-        int ret = snprintf(bs->exact_filename, sizeof(bs->exact_filename),
-                           "blkdebug:%s:%s", s->config_file ?: "",
-                           bs->file->bs->exact_filename);
-        if (ret >= sizeof(bs->exact_filename)) {
-            /* An overflow makes the filename unusable, so do not report any */
-            bs->exact_filename[0] = 0;
-        }
+    if (!force_json && bs->file->exact_filename[0]) {
+        snprintf(bs->exact_filename, sizeof(bs->exact_filename),
+                 "blkdebug:%s:%s",
+                 qdict_get_try_str(bs->options, "config") ?: "",
+                 bs->file->exact_filename);
    }

    opts = qdict_new();
-    qdict_put_str(opts, "driver", "blkdebug");
+    qdict_put_obj(opts, "driver", QOBJECT(qstring_from_str("blkdebug")));

-    QINCREF(bs->file->bs->full_open_options);
-    qdict_put(opts, "image", bs->file->bs->full_open_options);
+    QINCREF(bs->file->full_open_options);
+    qdict_put_obj(opts, "image", QOBJECT(bs->file->full_open_options));

-    for (e = qdict_first(options); e; e = qdict_next(options, e)) {
-        if (strcmp(qdict_entry_key(e), "x-image")) {
+    for (e = qdict_first(bs->options); e; e = qdict_next(bs->options, e)) {
+        if (strcmp(qdict_entry_key(e), "x-image") &&
+            strcmp(qdict_entry_key(e), "image") &&
+            strncmp(qdict_entry_key(e), "image.", strlen("image.")))
+        {
            qobject_incref(qdict_entry_value(e));
            qdict_put_obj(opts, qdict_entry_key(e), qdict_entry_value(e));
        }
@@ -865,36 +773,6 @@ static void blkdebug_refresh_filename(BlockDriverState *bs, QDict *options)
    bs->full_open_options = opts;
 }

-static void blkdebug_refresh_limits(BlockDriverState *bs, Error **errp)
-{
-    BDRVBlkdebugState *s = bs->opaque;
-
-    if (s->align) {
-        bs->bl.request_alignment = s->align;
-    }
-    if (s->max_transfer) {
-        bs->bl.max_transfer = s->max_transfer;
-    }
-    if (s->opt_write_zero) {
-        bs->bl.pwrite_zeroes_alignment = s->opt_write_zero;
-    }
-    if (s->max_write_zero) {
-        bs->bl.max_pwrite_zeroes = s->max_write_zero;
-    }
-    if (s->opt_discard) {
-        bs->bl.pdiscard_alignment = s->opt_discard;
-    }
-    if (s->max_discard) {
-        bs->bl.max_pdiscard = s->max_discard;
-    }
-}
-
-static int blkdebug_reopen_prepare(BDRVReopenState *reopen_state,
-                                   BlockReopenQueue *queue, Error **errp)
-{
-    return 0;
-}
-
 static BlockDriver bdrv_blkdebug = {
    .format_name            = "blkdebug",
    .protocol_name          = "blkdebug",
@@ -903,19 +781,13 @@ static BlockDriver bdrv_blkdebug = {
    .bdrv_parse_filename    = blkdebug_parse_filename,
    .bdrv_file_open         = blkdebug_open,
    .bdrv_close             = blkdebug_close,
-    .bdrv_reopen_prepare    = blkdebug_reopen_prepare,
-    .bdrv_child_perm        = bdrv_filter_default_perms,
-
    .bdrv_getlength         = blkdebug_getlength,
    .bdrv_truncate          = blkdebug_truncate,
    .bdrv_refresh_filename  = blkdebug_refresh_filename,
-    .bdrv_refresh_limits    = blkdebug_refresh_limits,

-    .bdrv_co_preadv         = blkdebug_co_preadv,
-    .bdrv_co_pwritev        = blkdebug_co_pwritev,
-    .bdrv_co_flush_to_disk  = blkdebug_co_flush,
-    .bdrv_co_pwrite_zeroes  = blkdebug_co_pwrite_zeroes,
-    .bdrv_co_pdiscard       = blkdebug_co_pdiscard,
+    .bdrv_aio_readv         = blkdebug_aio_readv,
+    .bdrv_aio_writev        = blkdebug_aio_writev,
+    .bdrv_aio_flush         = blkdebug_aio_flush,

    .bdrv_debug_event           = blkdebug_debug_event,
    .bdrv_debug_breakpoint      = blkdebug_debug_breakpoint,
@@ -1,153 +0,0 @@
-/*
- * Block protocol for record/replay
- *
- * Copyright (c) 2010-2016 Institute for System Programming
- *                         of the Russian Academy of Sciences.
- *
- * This work is licensed under the terms of the GNU GPL, version 2 or later.
- * See the COPYING file in the top-level directory.
- *
- */
-
-#include "qemu/osdep.h"
-#include "qemu-common.h"
-#include "block/block_int.h"
-#include "sysemu/replay.h"
-#include "qapi/error.h"
-
-typedef struct Request {
-    Coroutine *co;
-    QEMUBH *bh;
-} Request;
-
-static int blkreplay_open(BlockDriverState *bs, QDict *options, int flags,
-                          Error **errp)
-{
-    Error *local_err = NULL;
-    int ret;
-
-    /* Open the image file */
-    bs->file = bdrv_open_child(NULL, options, "image",
-                               bs, &child_file, false, &local_err);
-    if (local_err) {
-        ret = -EINVAL;
-        error_propagate(errp, local_err);
-        goto fail;
-    }
-
-    ret = 0;
-fail:
-    return ret;
-}
-
-static void blkreplay_close(BlockDriverState *bs)
-{
-}
-
-static int64_t blkreplay_getlength(BlockDriverState *bs)
-{
-    return bdrv_getlength(bs->file->bs);
-}
-
-/* This bh is used for synchronization of return from coroutines.
-   It continues yielded coroutine which then finishes its execution.
-   BH is called adjusted to some replay checkpoint, therefore
-   record and replay will always finish coroutines deterministically.
-*/
-static void blkreplay_bh_cb(void *opaque)
-{
-    Request *req = opaque;
-    aio_co_wake(req->co);
-    qemu_bh_delete(req->bh);
-    g_free(req);
-}
-
-static void block_request_create(uint64_t reqid, BlockDriverState *bs,
-                                 Coroutine *co)
-{
-    Request *req = g_new(Request, 1);
-    *req = (Request) {
-        .co = co,
-        .bh = aio_bh_new(bdrv_get_aio_context(bs), blkreplay_bh_cb, req),
-    };
-    replay_block_event(req->bh, reqid);
-}
-
-static int coroutine_fn blkreplay_co_preadv(BlockDriverState *bs,
-    uint64_t offset, uint64_t bytes, QEMUIOVector *qiov, int flags)
-{
-    uint64_t reqid = blkreplay_next_id();
-    int ret = bdrv_co_preadv(bs->file, offset, bytes, qiov, flags);
-    block_request_create(reqid, bs, qemu_coroutine_self());
-    qemu_coroutine_yield();
-
-    return ret;
-}
-
-static int coroutine_fn blkreplay_co_pwritev(BlockDriverState *bs,
-    uint64_t offset, uint64_t bytes, QEMUIOVector *qiov, int flags)
-{
-    uint64_t reqid = blkreplay_next_id();
-    int ret = bdrv_co_pwritev(bs->file, offset, bytes, qiov, flags);
-    block_request_create(reqid, bs, qemu_coroutine_self());
-    qemu_coroutine_yield();
-
-    return ret;
-}
-
-static int coroutine_fn blkreplay_co_pwrite_zeroes(BlockDriverState *bs,
-    int64_t offset, int count, BdrvRequestFlags flags)
-{
-    uint64_t reqid = blkreplay_next_id();
-    int ret = bdrv_co_pwrite_zeroes(bs->file, offset, count, flags);
-    block_request_create(reqid, bs, qemu_coroutine_self());
-    qemu_coroutine_yield();
-
-    return ret;
-}
-
-static int coroutine_fn blkreplay_co_pdiscard(BlockDriverState *bs,
-                                              int64_t offset, int count)
-{
-    uint64_t reqid = blkreplay_next_id();
-    int ret = bdrv_co_pdiscard(bs->file->bs, offset, count);
-    block_request_create(reqid, bs, qemu_coroutine_self());
-    qemu_coroutine_yield();
-
-    return ret;
-}
-
-static int coroutine_fn blkreplay_co_flush(BlockDriverState *bs)
-{
-    uint64_t reqid = blkreplay_next_id();
-    int ret = bdrv_co_flush(bs->file->bs);
-    block_request_create(reqid, bs, qemu_coroutine_self());
-    qemu_coroutine_yield();
-
-    return ret;
-}
-
-static BlockDriver bdrv_blkreplay = {
-    .format_name            = "blkreplay",
-    .protocol_name          = "blkreplay",
-    .instance_size          = 0,
-
-    .bdrv_file_open         = blkreplay_open,
-    .bdrv_close             = blkreplay_close,
-    .bdrv_child_perm        = bdrv_filter_default_perms,
-    .bdrv_getlength         = blkreplay_getlength,
-
-    .bdrv_co_preadv         = blkreplay_co_preadv,
-    .bdrv_co_pwritev        = blkreplay_co_pwritev,
-
-    .bdrv_co_pwrite_zeroes  = blkreplay_co_pwrite_zeroes,
-    .bdrv_co_pdiscard       = blkreplay_co_pdiscard,
-    .bdrv_co_flush          = blkreplay_co_flush,
-};
-
-static void bdrv_blkreplay_init(void)
-{
-    bdrv_register(&bdrv_blkreplay);
-}
-
-block_init(bdrv_blkreplay_init);
@@ -7,48 +7,49 @@
 * See the COPYING file in the top-level directory.
 */

-#include "qemu/osdep.h"
-#include "qapi/error.h"
+#include <stdarg.h>
 #include "qemu/sockets.h" /* for EINPROGRESS on Windows */
 #include "block/block_int.h"
 #include "qapi/qmp/qdict.h"
 #include "qapi/qmp/qstring.h"
-#include "qemu/cutils.h"

 typedef struct {
-    BdrvChild *test_file;
+    BlockDriverState *test_file;
 } BDRVBlkverifyState;

-typedef struct BlkverifyRequest {
-    Coroutine *co;
-    BlockDriverState *bs;
+typedef struct BlkverifyAIOCB BlkverifyAIOCB;
+struct BlkverifyAIOCB {
+    BlockAIOCB common;
+    QEMUBH *bh;

    /* Request metadata */
    bool is_write;
-    uint64_t offset;
-    uint64_t bytes;
-    int flags;
-
-    int (*request_fn)(BdrvChild *, int64_t, unsigned int, QEMUIOVector *,
-                      BdrvRequestFlags);
-
-    int ret;                    /* test image result */
-    int raw_ret;                /* raw image result */
+    int64_t sector_num;
+    int nb_sectors;

+    int ret;                    /* first completed request's result */
    unsigned int done;          /* completion counter */

    QEMUIOVector *qiov;         /* user I/O vector */
-    QEMUIOVector *raw_qiov;     /* cloned I/O vector for raw file */
-} BlkverifyRequest;
+    QEMUIOVector raw_qiov;      /* cloned I/O vector for raw file */
+    void *buf;                  /* buffer for raw file I/O */

-static void GCC_FMT_ATTR(2, 3) blkverify_err(BlkverifyRequest *r,
+    void (*verify)(BlkverifyAIOCB *acb);
+};
+
+static const AIOCBInfo blkverify_aiocb_info = {
+    .aiocb_size         = sizeof(BlkverifyAIOCB),
+};
+
+static void GCC_FMT_ATTR(2, 3) blkverify_err(BlkverifyAIOCB *acb,
                                             const char *fmt, ...)
 {
    va_list ap;

    va_start(ap, fmt);
-    fprintf(stderr, "blkverify: %s offset=%" PRId64 " bytes=%" PRId64 " ",
-            r->is_write ? "write" : "read", r->offset, r->bytes);
+    fprintf(stderr, "blkverify: %s sector_num=%" PRId64 " nb_sectors=%d ",
+            acb->is_write ? "write" : "read", acb->sector_num,
+            acb->nb_sectors);
    vfprintf(stderr, fmt, ap);
    fprintf(stderr, "\n");
    va_end(ap);
@@ -67,7 +68,7 @@ static void blkverify_parse_filename(const char *filename, QDict *options,
    if (!strstart(filename, "blkverify:", &filename)) {
        /* There was no prefix; therefore, all options have to be already
           present in the QDict (except for the filename) */
-        qdict_put_str(options, "x-image", filename);
+        qdict_put(options, "x-image", qstring_from_str(filename));
        return;
    }

@@ -84,7 +85,7 @@ static void blkverify_parse_filename(const char *filename, QDict *options,

    /* TODO Allow multi-level nesting and set file.filename here */
    filename = c + 1;
-    qdict_put_str(options, "x-image", filename);
+    qdict_put(options, "x-image", qstring_from_str(filename));
 }

 static QemuOptsList runtime_opts = {
@@ -122,21 +123,21 @@ static int blkverify_open(BlockDriverState *bs, QDict *options, int flags,
    }

    /* Open the raw file */
-    bs->file = bdrv_open_child(qemu_opt_get(opts, "x-raw"), options, "raw",
-                               bs, &child_file, false, &local_err);
-    if (local_err) {
-        ret = -EINVAL;
+    assert(bs->file == NULL);
+    ret = bdrv_open_image(&bs->file, qemu_opt_get(opts, "x-raw"), options,
+                          "raw", bs, &child_file, false, &local_err);
+    if (ret < 0) {
        error_propagate(errp, local_err);
        goto fail;
    }

    /* Open the test file */
-    s->test_file = bdrv_open_child(qemu_opt_get(opts, "x-image"), options,
-                                   "test", bs, &child_format, false,
-                                   &local_err);
-    if (local_err) {
-        ret = -EINVAL;
+    assert(s->test_file == NULL);
+    ret = bdrv_open_image(&s->test_file, qemu_opt_get(opts, "x-image"), options,
+                          "test", bs, &child_format, false, &local_err);
+    if (ret < 0) {
        error_propagate(errp, local_err);
+        s->test_file = NULL;
        goto fail;
    }

@@ -150,7 +151,7 @@ static void blkverify_close(BlockDriverState *bs)
 {
    BDRVBlkverifyState *s = bs->opaque;

-    bdrv_unref_child(bs, s->test_file);
+    bdrv_unref(s->test_file);
    s->test_file = NULL;
 }

@@ -158,109 +159,119 @@ static int64_t blkverify_getlength(BlockDriverState *bs)
 {
    BDRVBlkverifyState *s = bs->opaque;

-    return bdrv_getlength(s->test_file->bs);
+    return bdrv_getlength(s->test_file);
 }

-static void coroutine_fn blkverify_do_test_req(void *opaque)
+static BlkverifyAIOCB *blkverify_aio_get(BlockDriverState *bs, bool is_write,
+                                         int64_t sector_num, QEMUIOVector *qiov,
+                                         int nb_sectors,
+                                         BlockCompletionFunc *cb,
+                                         void *opaque)
 {
-    BlkverifyRequest *r = opaque;
-    BDRVBlkverifyState *s = r->bs->opaque;
+    BlkverifyAIOCB *acb = qemu_aio_get(&blkverify_aiocb_info, bs, cb, opaque);

-    r->ret = r->request_fn(s->test_file, r->offset, r->bytes, r->qiov,
-                           r->flags);
-    r->done++;
-    qemu_coroutine_enter_if_inactive(r->co);
+    acb->bh = NULL;
+    acb->is_write = is_write;
+    acb->sector_num = sector_num;
+    acb->nb_sectors = nb_sectors;
+    acb->ret = -EINPROGRESS;
+    acb->done = 0;
+    acb->qiov = qiov;
+    acb->buf = NULL;
+    acb->verify = NULL;
+    return acb;
 }

-static void coroutine_fn blkverify_do_raw_req(void *opaque)
+static void blkverify_aio_bh(void *opaque)
 {
-    BlkverifyRequest *r = opaque;
+    BlkverifyAIOCB *acb = opaque;

-    r->raw_ret = r->request_fn(r->bs->file, r->offset, r->bytes, r->raw_qiov,
-                               r->flags);
-    r->done++;
-    qemu_coroutine_enter_if_inactive(r->co);
-}
-
-static int coroutine_fn
-blkverify_co_prwv(BlockDriverState *bs, BlkverifyRequest *r, uint64_t offset,
-                  uint64_t bytes, QEMUIOVector *qiov, QEMUIOVector *raw_qiov,
-                  int flags, bool is_write)
-{
-    Coroutine *co_a, *co_b;
-
-    *r = (BlkverifyRequest) {
-        .co         = qemu_coroutine_self(),
-        .bs         = bs,
-        .offset     = offset,
-        .bytes      = bytes,
-        .qiov       = qiov,
-        .raw_qiov   = raw_qiov,
-        .flags      = flags,
-        .is_write   = is_write,
-        .request_fn = is_write ? bdrv_co_pwritev : bdrv_co_preadv,
-    };
-
-    co_a = qemu_coroutine_create(blkverify_do_test_req, r);
-    co_b = qemu_coroutine_create(blkverify_do_raw_req, r);
-
-    qemu_coroutine_enter(co_a);
-    qemu_coroutine_enter(co_b);
-
-    while (r->done < 2) {
-        qemu_coroutine_yield();
+    qemu_bh_delete(acb->bh);
+    if (acb->buf) {
+        qemu_iovec_destroy(&acb->raw_qiov);
+        qemu_vfree(acb->buf);
    }
-
-    if (r->ret != r->raw_ret) {
-        blkverify_err(r, "return value mismatch %d != %d", r->ret, r->raw_ret);
-    }
-
-    return r->ret;
+    acb->common.cb(acb->common.opaque, acb->ret);
+    qemu_aio_unref(acb);
 }

-static int coroutine_fn
-blkverify_co_preadv(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
-                    QEMUIOVector *qiov, int flags)
+static void blkverify_aio_cb(void *opaque, int ret)
 {
-    BlkverifyRequest r;
-    QEMUIOVector raw_qiov;
-    void *buf;
-    ssize_t cmp_offset;
-    int ret;
+    BlkverifyAIOCB *acb = opaque;

-    buf = qemu_blockalign(bs->file->bs, qiov->size);
-    qemu_iovec_init(&raw_qiov, qiov->niov);
-    qemu_iovec_clone(&raw_qiov, qiov, buf);
+    switch (++acb->done) {
+    case 1:
+        acb->ret = ret;
+        break;

-    ret = blkverify_co_prwv(bs, &r, offset, bytes, qiov, &raw_qiov, flags,
-                            false);
+    case 2:
+        if (acb->ret != ret) {
+            blkverify_err(acb, "return value mismatch %d != %d", acb->ret, ret);
+        }

-    cmp_offset = qemu_iovec_compare(qiov, &raw_qiov);
-    if (cmp_offset != -1) {
-        blkverify_err(&r, "contents mismatch at offset %" PRId64,
-                      offset + cmp_offset);
+        if (acb->verify) {
+            acb->verify(acb);
+        }
+
+        acb->bh = aio_bh_new(bdrv_get_aio_context(acb->common.bs),
+                             blkverify_aio_bh, acb);
+        qemu_bh_schedule(acb->bh);
+        break;
    }
-
-    qemu_iovec_destroy(&raw_qiov);
-    qemu_vfree(buf);
-
-    return ret;
 }

-static int coroutine_fn
-blkverify_co_pwritev(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
-                     QEMUIOVector *qiov, int flags)
+static void blkverify_verify_readv(BlkverifyAIOCB *acb)
 {
-    BlkverifyRequest r;
-    return blkverify_co_prwv(bs, &r, offset, bytes, qiov, qiov, flags, true);
+    ssize_t offset = qemu_iovec_compare(acb->qiov, &acb->raw_qiov);
+    if (offset != -1) {
+        blkverify_err(acb, "contents mismatch in sector %" PRId64,
+                      acb->sector_num + (int64_t)(offset / BDRV_SECTOR_SIZE));
+    }
 }

-static int blkverify_co_flush(BlockDriverState *bs)
+static BlockAIOCB *blkverify_aio_readv(BlockDriverState *bs,
+        int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
+        BlockCompletionFunc *cb, void *opaque)
+{
+    BDRVBlkverifyState *s = bs->opaque;
+    BlkverifyAIOCB *acb = blkverify_aio_get(bs, false, sector_num, qiov,
+                                            nb_sectors, cb, opaque);
+
+    acb->verify = blkverify_verify_readv;
+    acb->buf = qemu_blockalign(bs->file, qiov->size);
+    qemu_iovec_init(&acb->raw_qiov, acb->qiov->niov);
+    qemu_iovec_clone(&acb->raw_qiov, qiov, acb->buf);
+
+    bdrv_aio_readv(s->test_file, sector_num, qiov, nb_sectors,
+                   blkverify_aio_cb, acb);
+    bdrv_aio_readv(bs->file, sector_num, &acb->raw_qiov, nb_sectors,
+                   blkverify_aio_cb, acb);
+    return &acb->common;
+}
+
+static BlockAIOCB *blkverify_aio_writev(BlockDriverState *bs,
+        int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
+        BlockCompletionFunc *cb, void *opaque)
+{
+    BDRVBlkverifyState *s = bs->opaque;
+    BlkverifyAIOCB *acb = blkverify_aio_get(bs, true, sector_num, qiov,
+                                            nb_sectors, cb, opaque);
+
+    bdrv_aio_writev(s->test_file, sector_num, qiov, nb_sectors,
+                    blkverify_aio_cb, acb);
+    bdrv_aio_writev(bs->file, sector_num, qiov, nb_sectors,
+                    blkverify_aio_cb, acb);
+    return &acb->common;
+}
+
+static BlockAIOCB *blkverify_aio_flush(BlockDriverState *bs,
+                                       BlockCompletionFunc *cb,
+                                       void *opaque)
 {
    BDRVBlkverifyState *s = bs->opaque;

    /* Only flush test file, the raw file is not important */
-    return bdrv_co_flush(s->test_file->bs);
+    return bdrv_aio_flush(s->test_file, cb, opaque);
 }

 static bool blkverify_recurse_is_first_non_filter(BlockDriverState *bs,
@@ -268,47 +279,54 @@ static bool blkverify_recurse_is_first_non_filter(BlockDriverState *bs,
 {
    BDRVBlkverifyState *s = bs->opaque;

-    bool perm = bdrv_recurse_is_first_non_filter(bs->file->bs, candidate);
+    bool perm = bdrv_recurse_is_first_non_filter(bs->file, candidate);

    if (perm) {
        return true;
    }

-    return bdrv_recurse_is_first_non_filter(s->test_file->bs, candidate);
+    return bdrv_recurse_is_first_non_filter(s->test_file, candidate);
 }

-static void blkverify_refresh_filename(BlockDriverState *bs, QDict *options)
+/* Propagate AioContext changes to ->test_file */
+static void blkverify_detach_aio_context(BlockDriverState *bs)
 {
    BDRVBlkverifyState *s = bs->opaque;

-    /* bs->file->bs has already been refreshed */
-    bdrv_refresh_filename(s->test_file->bs);
+    bdrv_detach_aio_context(s->test_file);
+}

-    if (bs->file->bs->full_open_options
-        && s->test_file->bs->full_open_options)
-    {
+static void blkverify_attach_aio_context(BlockDriverState *bs,
+                                         AioContext *new_context)
+{
+    BDRVBlkverifyState *s = bs->opaque;
+
+    bdrv_attach_aio_context(s->test_file, new_context);
+}
+
+static void blkverify_refresh_filename(BlockDriverState *bs)
+{
+    BDRVBlkverifyState *s = bs->opaque;
+
+    /* bs->file has already been refreshed */
+    bdrv_refresh_filename(s->test_file);
+
+    if (bs->file->full_open_options && s->test_file->full_open_options) {
        QDict *opts = qdict_new();
-        qdict_put_str(opts, "driver", "blkverify");
+        qdict_put_obj(opts, "driver", QOBJECT(qstring_from_str("blkverify")));

-        QINCREF(bs->file->bs->full_open_options);
-        qdict_put(opts, "raw", bs->file->bs->full_open_options);
-        QINCREF(s->test_file->bs->full_open_options);
-        qdict_put(opts, "test", s->test_file->bs->full_open_options);
+        QINCREF(bs->file->full_open_options);
+        qdict_put_obj(opts, "raw", QOBJECT(bs->file->full_open_options));
+        QINCREF(s->test_file->full_open_options);
+        qdict_put_obj(opts, "test", QOBJECT(s->test_file->full_open_options));

        bs->full_open_options = opts;
    }

-    if (bs->file->bs->exact_filename[0]
-        && s->test_file->bs->exact_filename[0])
-    {
-        int ret = snprintf(bs->exact_filename, sizeof(bs->exact_filename),
-                           "blkverify:%s:%s",
-                           bs->file->bs->exact_filename,
-                           s->test_file->bs->exact_filename);
-        if (ret >= sizeof(bs->exact_filename)) {
-            /* An overflow makes the filename unusable, so do not report any */
-            bs->exact_filename[0] = 0;
-        }
+    if (bs->file->exact_filename[0] && s->test_file->exact_filename[0]) {
+        snprintf(bs->exact_filename, sizeof(bs->exact_filename),
+                 "blkverify:%s:%s",
+                 bs->file->exact_filename, s->test_file->exact_filename);
    }
 }

@@ -320,13 +338,15 @@ static BlockDriver bdrv_blkverify = {
    .bdrv_parse_filename              = blkverify_parse_filename,
    .bdrv_file_open                   = blkverify_open,
    .bdrv_close                       = blkverify_close,
-    .bdrv_child_perm                  = bdrv_filter_default_perms,
    .bdrv_getlength                   = blkverify_getlength,
    .bdrv_refresh_filename            = blkverify_refresh_filename,

-    .bdrv_co_preadv                   = blkverify_co_preadv,
-    .bdrv_co_pwritev                  = blkverify_co_pwritev,
-    .bdrv_co_flush                    = blkverify_co_flush,
+    .bdrv_aio_readv                   = blkverify_aio_readv,
+    .bdrv_aio_writev                  = blkverify_aio_writev,
+    .bdrv_aio_flush                   = blkverify_aio_flush,
+
+    .bdrv_attach_aio_context          = blkverify_attach_aio_context,
+    .bdrv_detach_aio_context          = blkverify_detach_aio_context,

    .is_filter                        = true,
    .bdrv_recurse_is_first_non_filter = blkverify_recurse_is_first_non_filter,
@@ -22,12 +22,9 @@
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
-#include "qemu/osdep.h"
-#include "qapi/error.h"
 #include "qemu-common.h"
 #include "block/block_int.h"
 #include "qemu/module.h"
-#include "qemu/bswap.h"

 /**************************************************************/

@@ -104,13 +101,7 @@ static int bochs_open(BlockDriverState *bs, QDict *options, int flags,
    struct bochs_header bochs;
    int ret;

-    bs->file = bdrv_open_child(NULL, options, "file", bs, &child_file,
-                               false, errp);
-    if (!bs->file) {
-        return -EINVAL;
-    }
-
-    bs->read_only = true; /* no write support yet */
+    bs->read_only = 1; // no write support yet

    ret = bdrv_pread(bs->file, 0, &bochs, sizeof(bochs));
    if (ret < 0) {
@@ -194,11 +185,6 @@ fail:
    return ret;
 }

-static void bochs_refresh_limits(BlockDriverState *bs, Error **errp)
-{
-    bs->bl.request_alignment = BDRV_SECTOR_SIZE; /* No sub-sector I/O */
-}
-
 static int64_t seek_to_sector(BlockDriverState *bs, int64_t sector_num)
 {
    BDRVBochsState *s = bs->opaque;
@@ -233,52 +219,38 @@ static int64_t seek_to_sector(BlockDriverState *bs, int64_t sector_num)
    return bitmap_offset + (512 * (s->bitmap_blocks + extent_offset));
 }

-static int coroutine_fn
-bochs_co_preadv(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
-                QEMUIOVector *qiov, int flags)
+static int bochs_read(BlockDriverState *bs, int64_t sector_num,
+                    uint8_t *buf, int nb_sectors)
 {
-    BDRVBochsState *s = bs->opaque;
-    uint64_t sector_num = offset >> BDRV_SECTOR_BITS;
-    int nb_sectors = bytes >> BDRV_SECTOR_BITS;
-    uint64_t bytes_done = 0;
-    QEMUIOVector local_qiov;
    int ret;

-    assert((offset & (BDRV_SECTOR_SIZE - 1)) == 0);
-    assert((bytes & (BDRV_SECTOR_SIZE - 1)) == 0);
-
-    qemu_iovec_init(&local_qiov, qiov->niov);
-    qemu_co_mutex_lock(&s->lock);
-
    while (nb_sectors > 0) {
        int64_t block_offset = seek_to_sector(bs, sector_num);
        if (block_offset < 0) {
-            ret = block_offset;
-            goto fail;
-        }
-
-        qemu_iovec_reset(&local_qiov);
-        qemu_iovec_concat(&local_qiov, qiov, bytes_done, 512);
-
-        if (block_offset > 0) {
-            ret = bdrv_co_preadv(bs->file, block_offset, 512,
-                                 &local_qiov, 0);
+            return block_offset;
+        } else if (block_offset > 0) {
+            ret = bdrv_pread(bs->file, block_offset, buf, 512);
            if (ret < 0) {
-                goto fail;
+                return ret;
            }
        } else {
-            qemu_iovec_memset(&local_qiov, 0, 0, 512);
+            memset(buf, 0, 512);
        }
        nb_sectors--;
        sector_num++;
-        bytes_done += 512;
+        buf += 512;
    }
+    return 0;
+}

-    ret = 0;
-fail:
+static coroutine_fn int bochs_co_read(BlockDriverState *bs, int64_t sector_num,
+                                      uint8_t *buf, int nb_sectors)
+{
+    int ret;
+    BDRVBochsState *s = bs->opaque;
+    qemu_co_mutex_lock(&s->lock);
+    ret = bochs_read(bs, sector_num, buf, nb_sectors);
    qemu_co_mutex_unlock(&s->lock);
-    qemu_iovec_destroy(&local_qiov);
-
    return ret;
 }

@@ -293,9 +265,7 @@ static BlockDriver bdrv_bochs = {
    .instance_size	= sizeof(BDRVBochsState),
    .bdrv_probe		= bochs_probe,
    .bdrv_open		= bochs_open,
-    .bdrv_child_perm     = bdrv_format_default_perms,
-    .bdrv_refresh_limits = bochs_refresh_limits,
-    .bdrv_co_preadv = bochs_co_preadv,
+    .bdrv_read          = bochs_co_read,
    .bdrv_close		= bochs_close,
 };

@@ -21,12 +21,9 @@
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
-#include "qemu/osdep.h"
-#include "qapi/error.h"
 #include "qemu-common.h"
 #include "block/block_int.h"
 #include "qemu/module.h"
-#include "qemu/bswap.h"
 #include <zlib.h>

 /* Maximum compressed block size */
@@ -66,13 +63,7 @@ static int cloop_open(BlockDriverState *bs, QDict *options, int flags,
    uint32_t offsets_size, max_compressed_block_size = 1, i;
    int ret;

-    bs->file = bdrv_open_child(NULL, options, "file", bs, &child_file,
-                               false, errp);
-    if (!bs->file) {
-        return -EINVAL;
-    }
-
-    bs->read_only = true;
+    bs->read_only = 1;

    /* read header */
    ret = bdrv_pread(bs->file, 128, &s->block_size, 4);
@@ -204,11 +195,6 @@ fail:
    return ret;
 }

-static void cloop_refresh_limits(BlockDriverState *bs, Error **errp)
-{
-    bs->bl.request_alignment = BDRV_SECTOR_SIZE; /* No sub-sector I/O */
-}
-
 static inline int cloop_read_block(BlockDriverState *bs, int block_num)
 {
    BDRVCloopState *s = bs->opaque;
@@ -217,8 +203,8 @@ static inline int cloop_read_block(BlockDriverState *bs, int block_num)
        int ret;
        uint32_t bytes = s->offsets[block_num + 1] - s->offsets[block_num];

-        ret = bdrv_pread(bs->file, s->offsets[block_num],
-                         s->compressed_block, bytes);
+        ret = bdrv_pread(bs->file, s->offsets[block_num], s->compressed_block,
+                         bytes);
        if (ret != bytes) {
            return -1;
        }
@@ -241,38 +227,33 @@ static inline int cloop_read_block(BlockDriverState *bs, int block_num)
    return 0;
 }

-static int coroutine_fn
-cloop_co_preadv(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
-                QEMUIOVector *qiov, int flags)
+static int cloop_read(BlockDriverState *bs, int64_t sector_num,
+                    uint8_t *buf, int nb_sectors)
 {
    BDRVCloopState *s = bs->opaque;
-    uint64_t sector_num = offset >> BDRV_SECTOR_BITS;
-    int nb_sectors = bytes >> BDRV_SECTOR_BITS;
-    int ret, i;
-
-    assert((offset & (BDRV_SECTOR_SIZE - 1)) == 0);
-    assert((bytes & (BDRV_SECTOR_SIZE - 1)) == 0);
-
-    qemu_co_mutex_lock(&s->lock);
+    int i;

    for (i = 0; i < nb_sectors; i++) {
-        void *data;
        uint32_t sector_offset_in_block =
            ((sector_num + i) % s->sectors_per_block),
            block_num = (sector_num + i) / s->sectors_per_block;
        if (cloop_read_block(bs, block_num) != 0) {
-            ret = -EIO;
-            goto fail;
+            return -1;
        }
-
-        data = s->uncompressed_block + sector_offset_in_block * 512;
-        qemu_iovec_from_buf(qiov, i * 512, data, 512);
+        memcpy(buf + i * 512,
+            s->uncompressed_block + sector_offset_in_block * 512, 512);
    }
+    return 0;
+}

-    ret = 0;
-fail:
+static coroutine_fn int cloop_co_read(BlockDriverState *bs, int64_t sector_num,
+                                      uint8_t *buf, int nb_sectors)
+{
+    int ret;
+    BDRVCloopState *s = bs->opaque;
+    qemu_co_mutex_lock(&s->lock);
+    ret = cloop_read(bs, sector_num, buf, nb_sectors);
    qemu_co_mutex_unlock(&s->lock);
-
    return ret;
 }

@@ -290,9 +271,7 @@ static BlockDriver bdrv_cloop = {
    .instance_size  = sizeof(BDRVCloopState),
    .bdrv_probe     = cloop_probe,
    .bdrv_open      = cloop_open,
-    .bdrv_child_perm     = bdrv_format_default_perms,
-    .bdrv_refresh_limits = cloop_refresh_limits,
-    .bdrv_co_preadv = cloop_co_preadv,
+    .bdrv_read      = cloop_co_read,
    .bdrv_close     = cloop_close,
 };

@@ -12,15 +12,11 @@
 *
 */

-#include "qemu/osdep.h"
-#include "qemu/cutils.h"
 #include "trace.h"
 #include "block/block_int.h"
-#include "block/blockjob_int.h"
-#include "qapi/error.h"
+#include "block/blockjob.h"
 #include "qapi/qmp/qerror.h"
 #include "qemu/ratelimit.h"
-#include "sysemu/block-backend.h"

 enum {
    /*
@@ -37,37 +33,28 @@ typedef struct CommitBlockJob {
    BlockJob common;
    RateLimit limit;
    BlockDriverState *active;
-    BlockDriverState *commit_top_bs;
-    BlockBackend *top;
-    BlockBackend *base;
+    BlockDriverState *top;
+    BlockDriverState *base;
    BlockdevOnError on_error;
    int base_flags;
    int orig_overlay_flags;
    char *backing_file_str;
 } CommitBlockJob;

-static int coroutine_fn commit_populate(BlockBackend *bs, BlockBackend *base,
+static int coroutine_fn commit_populate(BlockDriverState *bs,
+                                        BlockDriverState *base,
                                        int64_t sector_num, int nb_sectors,
                                        void *buf)
 {
    int ret = 0;
-    QEMUIOVector qiov;
-    struct iovec iov = {
-        .iov_base = buf,
-        .iov_len = nb_sectors * BDRV_SECTOR_SIZE,
-    };

-    qemu_iovec_init_external(&qiov, &iov, 1);
-
-    ret = blk_co_preadv(bs, sector_num * BDRV_SECTOR_SIZE,
-                        qiov.size, &qiov, 0);
-    if (ret < 0) {
+    ret = bdrv_read(bs, sector_num, buf, nb_sectors);
+    if (ret) {
        return ret;
    }

-    ret = blk_co_pwritev(base, sector_num * BDRV_SECTOR_SIZE,
-                         qiov.size, &qiov, 0);
-    if (ret < 0) {
+    ret = bdrv_write(base, sector_num, buf, nb_sectors);
+    if (ret) {
        return ret;
    }

@@ -83,31 +70,14 @@ static void commit_complete(BlockJob *job, void *opaque)
    CommitBlockJob *s = container_of(job, CommitBlockJob, common);
    CommitCompleteData *data = opaque;
    BlockDriverState *active = s->active;
-    BlockDriverState *top = blk_bs(s->top);
-    BlockDriverState *base = blk_bs(s->base);
-    BlockDriverState *overlay_bs = bdrv_find_overlay(active, s->commit_top_bs);
+    BlockDriverState *top = s->top;
+    BlockDriverState *base = s->base;
+    BlockDriverState *overlay_bs;
    int ret = data->ret;
-    bool remove_commit_top_bs = false;
-
-    /* Make sure overlay_bs and top stay around until bdrv_set_backing_hd() */
-    bdrv_ref(top);
-    if (overlay_bs) {
-        bdrv_ref(overlay_bs);
-    }
-
-    /* Remove base node parent that still uses BLK_PERM_WRITE/RESIZE before
-     * the normal backing chain can be restored. */
-    blk_unref(s->base);

    if (!block_job_is_cancelled(&s->common) && ret == 0) {
        /* success */
-        ret = bdrv_drop_intermediate(active, s->commit_top_bs, base,
-                                     s->backing_file_str);
-    } else if (overlay_bs) {
-        /* XXX Can (or should) we somehow keep 'consistent read' blocked even
-         * after the failed/cancelled commit job is gone? If we already wrote
-         * something to base, the intermediate images aren't valid any more. */
-        remove_commit_top_bs = true;
+        ret = bdrv_drop_intermediate(active, top, base, s->backing_file_str);
    }

    /* restore base open flags here if appropriate (e.g., change the base back
@@ -116,69 +86,55 @@ static void commit_complete(BlockJob *job, void *opaque)
    if (s->base_flags != bdrv_get_flags(base)) {
        bdrv_reopen(base, s->base_flags, NULL);
    }
+    overlay_bs = bdrv_find_overlay(active, top);
    if (overlay_bs && s->orig_overlay_flags != bdrv_get_flags(overlay_bs)) {
        bdrv_reopen(overlay_bs, s->orig_overlay_flags, NULL);
    }
    g_free(s->backing_file_str);
-    blk_unref(s->top);
-
-    /* If there is more than one reference to the job (e.g. if called from
-     * block_job_finish_sync()), block_job_completed() won't free it and
-     * therefore the blockers on the intermediate nodes remain. This would
-     * cause bdrv_set_backing_hd() to fail. */
-    block_job_remove_all_bdrv(job);
-
    block_job_completed(&s->common, ret);
    g_free(data);
-
-    /* If bdrv_drop_intermediate() didn't already do that, remove the commit
-     * filter driver from the backing chain. Do this as the final step so that
-     * the 'consistent read' permission can be granted.  */
-    if (remove_commit_top_bs) {
-        bdrv_set_backing_hd(overlay_bs, top, &error_abort);
-    }
-
-    bdrv_unref(overlay_bs);
-    bdrv_unref(top);
 }

 static void coroutine_fn commit_run(void *opaque)
 {
    CommitBlockJob *s = opaque;
    CommitCompleteData *data;
+    BlockDriverState *top = s->top;
+    BlockDriverState *base = s->base;
    int64_t sector_num, end;
-    uint64_t delay_ns = 0;
    int ret = 0;
    int n = 0;
    void *buf = NULL;
    int bytes_written = 0;
    int64_t base_len;

-    ret = s->common.len = blk_getlength(s->top);
+    ret = s->common.len = bdrv_getlength(top);


    if (s->common.len < 0) {
        goto out;
    }

-    ret = base_len = blk_getlength(s->base);
+    ret = base_len = bdrv_getlength(base);
    if (base_len < 0) {
        goto out;
    }

    if (base_len < s->common.len) {
-        ret = blk_truncate(s->base, s->common.len, NULL);
+        ret = bdrv_truncate(base, s->common.len);
        if (ret) {
            goto out;
        }
    }

    end = s->common.len >> BDRV_SECTOR_BITS;
-    buf = blk_blockalign(s->top, COMMIT_BUFFER_SIZE);
+    buf = qemu_blockalign(top, COMMIT_BUFFER_SIZE);

    for (sector_num = 0; sector_num < end; sector_num += n) {
+        uint64_t delay_ns = 0;
        bool copy;

+wait:
        /* Note that even when no rate limit is applied we need to yield
         * with no pending I/O here so that bdrv_drain_all() returns.
         */
@@ -187,20 +143,25 @@ static void coroutine_fn commit_run(void *opaque)
            break;
        }
        /* Copy if allocated above the base */
-        ret = bdrv_is_allocated_above(blk_bs(s->top), blk_bs(s->base),
-                                      sector_num,
+        ret = bdrv_is_allocated_above(top, base, sector_num,
                                      COMMIT_BUFFER_SIZE / BDRV_SECTOR_SIZE,
                                      &n);
        copy = (ret == 1);
        trace_commit_one_iteration(s, sector_num, n, ret);
        if (copy) {
-            ret = commit_populate(s->top, s->base, sector_num, n, buf);
+            if (s->common.speed) {
+                delay_ns = ratelimit_calculate_delay(&s->limit, n);
+                if (delay_ns > 0) {
+                    goto wait;
+                }
+            }
+            ret = commit_populate(top, base, sector_num, n, buf);
            bytes_written += n * BDRV_SECTOR_SIZE;
        }
        if (ret < 0) {
-            BlockErrorAction action =
-                block_job_error_action(&s->common, false, s->on_error, -ret);
-            if (action == BLOCK_ERROR_ACTION_REPORT) {
+            if (s->on_error == BLOCKDEV_ON_ERROR_STOP ||
+                s->on_error == BLOCKDEV_ON_ERROR_REPORT||
+                (s->on_error == BLOCKDEV_ON_ERROR_ENOSPC && ret == -ENOSPC)) {
                goto out;
            } else {
                n = 0;
@@ -209,10 +170,6 @@ static void coroutine_fn commit_run(void *opaque)
        }
        /* Publish progress */
        s->common.offset += n * BDRV_SECTOR_SIZE;
-
-        if (copy && s->common.speed) {
-            delay_ns = ratelimit_calculate_delay(&s->limit, n);
-        }
    }

    ret = 0;
@@ -240,70 +197,26 @@ static const BlockJobDriver commit_job_driver = {
    .instance_size = sizeof(CommitBlockJob),
    .job_type      = BLOCK_JOB_TYPE_COMMIT,
    .set_speed     = commit_set_speed,
-    .start         = commit_run,
 };

-static int coroutine_fn bdrv_commit_top_preadv(BlockDriverState *bs,
-    uint64_t offset, uint64_t bytes, QEMUIOVector *qiov, int flags)
-{
-    return bdrv_co_preadv(bs->backing, offset, bytes, qiov, flags);
-}
-
-static int64_t coroutine_fn bdrv_commit_top_get_block_status(
-    BlockDriverState *bs, int64_t sector_num, int nb_sectors, int *pnum,
-    BlockDriverState **file)
-{
-    *pnum = nb_sectors;
-    *file = bs->backing->bs;
-    return BDRV_BLOCK_RAW | BDRV_BLOCK_OFFSET_VALID | BDRV_BLOCK_DATA |
-           (sector_num << BDRV_SECTOR_BITS);
-}
-
-static void bdrv_commit_top_refresh_filename(BlockDriverState *bs, QDict *opts)
-{
-    bdrv_refresh_filename(bs->backing->bs);
-    pstrcpy(bs->exact_filename, sizeof(bs->exact_filename),
-            bs->backing->bs->filename);
-}
-
-static void bdrv_commit_top_close(BlockDriverState *bs)
-{
-}
-
-static void bdrv_commit_top_child_perm(BlockDriverState *bs, BdrvChild *c,
-                                       const BdrvChildRole *role,
-                                       uint64_t perm, uint64_t shared,
-                                       uint64_t *nperm, uint64_t *nshared)
-{
-    *nperm = 0;
-    *nshared = BLK_PERM_ALL;
-}
-
-/* Dummy node that provides consistent read to its users without requiring it
- * from its backing file and that allows writes on the backing file chain. */
-static BlockDriver bdrv_commit_top = {
-    .format_name                = "commit_top",
-    .bdrv_co_preadv             = bdrv_commit_top_preadv,
-    .bdrv_co_get_block_status   = bdrv_commit_top_get_block_status,
-    .bdrv_refresh_filename      = bdrv_commit_top_refresh_filename,
-    .bdrv_close                 = bdrv_commit_top_close,
-    .bdrv_child_perm            = bdrv_commit_top_child_perm,
-};
-
-void commit_start(const char *job_id, BlockDriverState *bs,
-                  BlockDriverState *base, BlockDriverState *top, int64_t speed,
-                  BlockdevOnError on_error, const char *backing_file_str,
-                  const char *filter_node_name, Error **errp)
+void commit_start(BlockDriverState *bs, BlockDriverState *base,
+                  BlockDriverState *top, int64_t speed,
+                  BlockdevOnError on_error, BlockCompletionFunc *cb,
+                  void *opaque, const char *backing_file_str, Error **errp)
 {
    CommitBlockJob *s;
    BlockReopenQueue *reopen_queue = NULL;
    int orig_overlay_flags;
    int orig_base_flags;
-    BlockDriverState *iter;
    BlockDriverState *overlay_bs;
-    BlockDriverState *commit_top_bs = NULL;
    Error *local_err = NULL;
-    int ret;
+
+    if ((on_error == BLOCKDEV_ON_ERROR_STOP ||
+         on_error == BLOCKDEV_ON_ERROR_ENOSPC) &&
+        !bdrv_iostatus_is_enabled(bs)) {
+        error_setg(errp, "Invalid parameter combination");
+        return;
+    }

    assert(top != bs);
    if (top == base) {
@@ -318,110 +231,34 @@ void commit_start(const char *job_id, BlockDriverState *bs,
        return;
    }

-    s = block_job_create(job_id, &commit_job_driver, bs, 0, BLK_PERM_ALL,
-                         speed, BLOCK_JOB_DEFAULT, NULL, NULL, errp);
-    if (!s) {
-        return;
-    }
-
    orig_base_flags    = bdrv_get_flags(base);
    orig_overlay_flags = bdrv_get_flags(overlay_bs);

    /* convert base & overlay_bs to r/w, if necessary */
    if (!(orig_base_flags & BDRV_O_RDWR)) {
-        reopen_queue = bdrv_reopen_queue(reopen_queue, base, NULL,
+        reopen_queue = bdrv_reopen_queue(reopen_queue, base,
                                         orig_base_flags | BDRV_O_RDWR);
    }
    if (!(orig_overlay_flags & BDRV_O_RDWR)) {
-        reopen_queue = bdrv_reopen_queue(reopen_queue, overlay_bs, NULL,
+        reopen_queue = bdrv_reopen_queue(reopen_queue, overlay_bs,
                                         orig_overlay_flags | BDRV_O_RDWR);
    }
    if (reopen_queue) {
-        bdrv_reopen_multiple(bdrv_get_aio_context(bs), reopen_queue, &local_err);
+        bdrv_reopen_multiple(reopen_queue, &local_err);
        if (local_err != NULL) {
            error_propagate(errp, local_err);
-            goto fail;
+            return;
        }
    }

-    /* Insert commit_top block node above top, so we can block consistent read
-     * on the backing chain below it */
-    commit_top_bs = bdrv_new_open_driver(&bdrv_commit_top, filter_node_name, 0,
-                                         errp);
-    if (commit_top_bs == NULL) {
-        goto fail;
-    }
-    if (!filter_node_name) {
-        commit_top_bs->implicit = true;
-    }
-    commit_top_bs->total_sectors = top->total_sectors;
-    bdrv_set_aio_context(commit_top_bs, bdrv_get_aio_context(top));

-    bdrv_set_backing_hd(commit_top_bs, top, &local_err);
-    if (local_err) {
-        bdrv_unref(commit_top_bs);
-        commit_top_bs = NULL;
-        error_propagate(errp, local_err);
-        goto fail;
-    }
-    bdrv_set_backing_hd(overlay_bs, commit_top_bs, &local_err);
-    if (local_err) {
-        bdrv_unref(commit_top_bs);
-        commit_top_bs = NULL;
-        error_propagate(errp, local_err);
-        goto fail;
-    }
-
-    s->commit_top_bs = commit_top_bs;
-    bdrv_unref(commit_top_bs);
-
-    /* Block all nodes between top and base, because they will
-     * disappear from the chain after this operation. */
-    assert(bdrv_chain_contains(top, base));
-    for (iter = top; iter != base; iter = backing_bs(iter)) {
-        /* XXX BLK_PERM_WRITE needs to be allowed so we don't block ourselves
-         * at s->base (if writes are blocked for a node, they are also blocked
-         * for its backing file). The other options would be a second filter
-         * driver above s->base. */
-        ret = block_job_add_bdrv(&s->common, "intermediate node", iter, 0,
-                                 BLK_PERM_WRITE_UNCHANGED | BLK_PERM_WRITE,
-                                 errp);
-        if (ret < 0) {
-            goto fail;
-        }
-    }
-
-    ret = block_job_add_bdrv(&s->common, "base", base, 0, BLK_PERM_ALL, errp);
-    if (ret < 0) {
-        goto fail;
-    }
-
-    /* overlay_bs must be blocked because it needs to be modified to
-     * update the backing image string. */
-    ret = block_job_add_bdrv(&s->common, "overlay of top", overlay_bs,
-                             BLK_PERM_GRAPH_MOD, BLK_PERM_ALL, errp);
-    if (ret < 0) {
-        goto fail;
-    }
-
-    s->base = blk_new(BLK_PERM_CONSISTENT_READ
-                      | BLK_PERM_WRITE
-                      | BLK_PERM_RESIZE,
-                      BLK_PERM_CONSISTENT_READ
-                      | BLK_PERM_GRAPH_MOD
-                      | BLK_PERM_WRITE_UNCHANGED);
-    ret = blk_insert_bs(s->base, base, errp);
-    if (ret < 0) {
-        goto fail;
-    }
-
-    /* Required permissions are already taken with block_job_add_bdrv() */
-    s->top = blk_new(0, BLK_PERM_ALL);
-    ret = blk_insert_bs(s->top, top, errp);
-    if (ret < 0) {
-        goto fail;
+    s = block_job_create(&commit_job_driver, bs, speed, cb, opaque, errp);
+    if (!s) {
+        return;
    }

+    s->base   = base;
+    s->top    = top;
    s->active = bs;

    s->base_flags          = orig_base_flags;
@@ -430,172 +267,8 @@ void commit_start(const char *job_id, BlockDriverState *bs,
    s->backing_file_str = g_strdup(backing_file_str);

    s->on_error = on_error;
+    s->common.co = qemu_coroutine_create(commit_run);

-    trace_commit_start(bs, base, top, s);
-    block_job_start(&s->common);
-    return;
-
-fail:
-    if (s->base) {
-        blk_unref(s->base);
-    }
-    if (s->top) {
-        blk_unref(s->top);
-    }
-    if (commit_top_bs) {
-        bdrv_set_backing_hd(overlay_bs, top, &error_abort);
-    }
-    block_job_unref(&s->common);
-}
-
-
-#define COMMIT_BUF_SECTORS 2048
-
-/* commit COW file into the raw image */
-int bdrv_commit(BlockDriverState *bs)
-{
-    BlockBackend *src, *backing;
-    BlockDriverState *backing_file_bs = NULL;
-    BlockDriverState *commit_top_bs = NULL;
-    BlockDriver *drv = bs->drv;
-    int64_t sector, total_sectors, length, backing_length;
-    int n, ro, open_flags;
-    int ret = 0;
-    uint8_t *buf = NULL;
-    Error *local_err = NULL;
-
-    if (!drv)
-        return -ENOMEDIUM;
-
-    if (!bs->backing) {
-        return -ENOTSUP;
-    }
-
-    if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_COMMIT_SOURCE, NULL) ||
-        bdrv_op_is_blocked(bs->backing->bs, BLOCK_OP_TYPE_COMMIT_TARGET, NULL)) {
-        return -EBUSY;
-    }
-
-    ro = bs->backing->bs->read_only;
-    open_flags =  bs->backing->bs->open_flags;
-
-    if (ro) {
-        if (bdrv_reopen(bs->backing->bs, open_flags | BDRV_O_RDWR, NULL)) {
-            return -EACCES;
-        }
-    }
-
-    src = blk_new(BLK_PERM_CONSISTENT_READ, BLK_PERM_ALL);
-    backing = blk_new(BLK_PERM_WRITE | BLK_PERM_RESIZE, BLK_PERM_ALL);
-
-    ret = blk_insert_bs(src, bs, &local_err);
-    if (ret < 0) {
-        error_report_err(local_err);
-        goto ro_cleanup;
-    }
-
-    /* Insert commit_top block node above backing, so we can write to it */
-    backing_file_bs = backing_bs(bs);
-
-    commit_top_bs = bdrv_new_open_driver(&bdrv_commit_top, NULL, BDRV_O_RDWR,
-                                         &local_err);
-    if (commit_top_bs == NULL) {
-        error_report_err(local_err);
-        goto ro_cleanup;
-    }
-    bdrv_set_aio_context(commit_top_bs, bdrv_get_aio_context(backing_file_bs));
-
-    bdrv_set_backing_hd(commit_top_bs, backing_file_bs, &error_abort);
-    bdrv_set_backing_hd(bs, commit_top_bs, &error_abort);
-
-    ret = blk_insert_bs(backing, backing_file_bs, &local_err);
-    if (ret < 0) {
-        error_report_err(local_err);
-        goto ro_cleanup;
-    }
-
-    length = blk_getlength(src);
-    if (length < 0) {
-        ret = length;
-        goto ro_cleanup;
-    }
-
-    backing_length = blk_getlength(backing);
-    if (backing_length < 0) {
-        ret = backing_length;
-        goto ro_cleanup;
-    }
-
-    /* If our top snapshot is larger than the backing file image,
-     * grow the backing file image if possible.  If not possible,
-     * we must return an error */
-    if (length > backing_length) {
-        ret = blk_truncate(backing, length, &local_err);
-        if (ret < 0) {
-            error_report_err(local_err);
-            goto ro_cleanup;
-        }
-    }
-
-    total_sectors = length >> BDRV_SECTOR_BITS;
-
-    /* blk_try_blockalign() for src will choose an alignment that works for
-     * backing as well, so no need to compare the alignment manually. */
-    buf = blk_try_blockalign(src, COMMIT_BUF_SECTORS * BDRV_SECTOR_SIZE);
-    if (buf == NULL) {
-        ret = -ENOMEM;
-        goto ro_cleanup;
-    }
-
-    for (sector = 0; sector < total_sectors; sector += n) {
-        ret = bdrv_is_allocated(bs, sector, COMMIT_BUF_SECTORS, &n);
-        if (ret < 0) {
-            goto ro_cleanup;
-        }
-        if (ret) {
-            ret = blk_pread(src, sector * BDRV_SECTOR_SIZE, buf,
-                            n * BDRV_SECTOR_SIZE);
-            if (ret < 0) {
-                goto ro_cleanup;
-            }
-
-            ret = blk_pwrite(backing, sector * BDRV_SECTOR_SIZE, buf,
-                             n * BDRV_SECTOR_SIZE, 0);
-            if (ret < 0) {
-                goto ro_cleanup;
-            }
-        }
-    }
-
-    if (drv->bdrv_make_empty) {
-        ret = drv->bdrv_make_empty(bs);
-        if (ret < 0) {
-            goto ro_cleanup;
-        }
-        blk_flush(src);
-    }
-
-    /*
-     * Make sure all data we wrote to the backing device is actually
-     * stable on disk.
-     */
-    blk_flush(backing);
-
-    ret = 0;
-ro_cleanup:
-    qemu_vfree(buf);
-
-    blk_unref(backing);
-    if (backing_file_bs) {
-        bdrv_set_backing_hd(bs, backing_file_bs, &error_abort);
-    }
-    bdrv_unref(commit_top_bs);
-    blk_unref(src);
-
-    if (ro) {
-        /* ignoring error return here */
-        bdrv_reopen(bs->backing->bs, open_flags & ~BDRV_O_RDWR, NULL);
-    }
-
-    return ret;
+    trace_commit_start(bs, base, top, s, s->common.co, opaque);
+    qemu_coroutine_enter(s->common.co, s);
 }
@@ -1,648 +0,0 @@
-/*
- * QEMU block full disk encryption
- *
- * Copyright (c) 2015-2016 Red Hat, Inc.
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, see <http://www.gnu.org/licenses/>.
- *
- */
-
-#include "qemu/osdep.h"
-
-#include "block/block_int.h"
-#include "sysemu/block-backend.h"
-#include "crypto/block.h"
-#include "qapi/opts-visitor.h"
-#include "qapi-visit.h"
-#include "qapi/error.h"
-
-#define BLOCK_CRYPTO_OPT_LUKS_KEY_SECRET "key-secret"
-#define BLOCK_CRYPTO_OPT_LUKS_CIPHER_ALG "cipher-alg"
-#define BLOCK_CRYPTO_OPT_LUKS_CIPHER_MODE "cipher-mode"
-#define BLOCK_CRYPTO_OPT_LUKS_IVGEN_ALG "ivgen-alg"
-#define BLOCK_CRYPTO_OPT_LUKS_IVGEN_HASH_ALG "ivgen-hash-alg"
-#define BLOCK_CRYPTO_OPT_LUKS_HASH_ALG "hash-alg"
-#define BLOCK_CRYPTO_OPT_LUKS_ITER_TIME "iter-time"
-
-typedef struct BlockCrypto BlockCrypto;
-
-struct BlockCrypto {
-    QCryptoBlock *block;
-};
-
-
-static int block_crypto_probe_generic(QCryptoBlockFormat format,
-                                      const uint8_t *buf,
-                                      int buf_size,
-                                      const char *filename)
-{
-    if (qcrypto_block_has_format(format, buf, buf_size)) {
-        return 100;
-    } else {
-        return 0;
-    }
-}
-
-
-static ssize_t block_crypto_read_func(QCryptoBlock *block,
-                                      size_t offset,
-                                      uint8_t *buf,
-                                      size_t buflen,
-                                      Error **errp,
-                                      void *opaque)
-{
-    BlockDriverState *bs = opaque;
-    ssize_t ret;
-
-    ret = bdrv_pread(bs->file, offset, buf, buflen);
-    if (ret < 0) {
-        error_setg_errno(errp, -ret, "Could not read encryption header");
-        return ret;
-    }
-    return ret;
-}
-
-
-struct BlockCryptoCreateData {
-    const char *filename;
-    QemuOpts *opts;
-    BlockBackend *blk;
-    uint64_t size;
-};
-
-
-static ssize_t block_crypto_write_func(QCryptoBlock *block,
-                                       size_t offset,
-                                       const uint8_t *buf,
-                                       size_t buflen,
-                                       Error **errp,
-                                       void *opaque)
-{
-    struct BlockCryptoCreateData *data = opaque;
-    ssize_t ret;
-
-    ret = blk_pwrite(data->blk, offset, buf, buflen, 0);
-    if (ret < 0) {
-        error_setg_errno(errp, -ret, "Could not write encryption header");
-        return ret;
-    }
-    return ret;
-}
-
-
-static ssize_t block_crypto_init_func(QCryptoBlock *block,
-                                      size_t headerlen,
-                                      Error **errp,
-                                      void *opaque)
-{
-    struct BlockCryptoCreateData *data = opaque;
-    int ret;
-
-    /* User provided size should reflect amount of space made
-     * available to the guest, so we must take account of that
-     * which will be used by the crypto header
-     */
-    data->size += headerlen;
-
-    qemu_opt_set_number(data->opts, BLOCK_OPT_SIZE, data->size, &error_abort);
-    ret = bdrv_create_file(data->filename, data->opts, errp);
-    if (ret < 0) {
-        return -1;
-    }
-
-    data->blk = blk_new_open(data->filename, NULL, NULL,
-                             BDRV_O_RDWR | BDRV_O_PROTOCOL, errp);
-    if (!data->blk) {
-        return -1;
-    }
-
-    return 0;
-}
-
-
-static QemuOptsList block_crypto_runtime_opts_luks = {
-    .name = "crypto",
-    .head = QTAILQ_HEAD_INITIALIZER(block_crypto_runtime_opts_luks.head),
-    .desc = {
-        {
-            .name = BLOCK_CRYPTO_OPT_LUKS_KEY_SECRET,
-            .type = QEMU_OPT_STRING,
-            .help = "ID of the secret that provides the encryption key",
-        },
-        { /* end of list */ }
-    },
-};
-
-
-static QemuOptsList block_crypto_create_opts_luks = {
-    .name = "crypto",
-    .head = QTAILQ_HEAD_INITIALIZER(block_crypto_create_opts_luks.head),
-    .desc = {
-        {
-            .name = BLOCK_OPT_SIZE,
-            .type = QEMU_OPT_SIZE,
-            .help = "Virtual disk size"
-        },
-        {
-            .name = BLOCK_CRYPTO_OPT_LUKS_KEY_SECRET,
-            .type = QEMU_OPT_STRING,
-            .help = "ID of the secret that provides the encryption key",
-        },
-        {
-            .name = BLOCK_CRYPTO_OPT_LUKS_CIPHER_ALG,
-            .type = QEMU_OPT_STRING,
-            .help = "Name of encryption cipher algorithm",
-        },
-        {
-            .name = BLOCK_CRYPTO_OPT_LUKS_CIPHER_MODE,
-            .type = QEMU_OPT_STRING,
-            .help = "Name of encryption cipher mode",
-        },
-        {
-            .name = BLOCK_CRYPTO_OPT_LUKS_IVGEN_ALG,
-            .type = QEMU_OPT_STRING,
-            .help = "Name of IV generator algorithm",
-        },
-        {
-            .name = BLOCK_CRYPTO_OPT_LUKS_IVGEN_HASH_ALG,
-            .type = QEMU_OPT_STRING,
-            .help = "Name of IV generator hash algorithm",
-        },
-        {
-            .name = BLOCK_CRYPTO_OPT_LUKS_HASH_ALG,
-            .type = QEMU_OPT_STRING,
-            .help = "Name of encryption hash algorithm",
-        },
-        {
-            .name = BLOCK_CRYPTO_OPT_LUKS_ITER_TIME,
-            .type = QEMU_OPT_NUMBER,
-            .help = "Time to spend in PBKDF in milliseconds",
-        },
-        { /* end of list */ }
-    },
-};
-
-
-static QCryptoBlockOpenOptions *
-block_crypto_open_opts_init(QCryptoBlockFormat format,
-                            QemuOpts *opts,
-                            Error **errp)
-{
-    Visitor *v;
-    QCryptoBlockOpenOptions *ret = NULL;
-    Error *local_err = NULL;
-
-    ret = g_new0(QCryptoBlockOpenOptions, 1);
-    ret->format = format;
-
-    v = opts_visitor_new(opts);
-
-    visit_start_struct(v, NULL, NULL, 0, &local_err);
-    if (local_err) {
-        goto out;
-    }
-
-    switch (format) {
-    case Q_CRYPTO_BLOCK_FORMAT_LUKS:
-        visit_type_QCryptoBlockOptionsLUKS_members(
-            v, &ret->u.luks, &local_err);
-        break;
-
-    default:
-        error_setg(&local_err, "Unsupported block format %d", format);
-        break;
-    }
-    if (!local_err) {
-        visit_check_struct(v, &local_err);
-    }
-
-    visit_end_struct(v, NULL);
-
- out:
-    if (local_err) {
-        error_propagate(errp, local_err);
-        qapi_free_QCryptoBlockOpenOptions(ret);
-        ret = NULL;
-    }
-    visit_free(v);
-    return ret;
-}
-
-
-static QCryptoBlockCreateOptions *
-block_crypto_create_opts_init(QCryptoBlockFormat format,
-                              QemuOpts *opts,
-                              Error **errp)
-{
-    Visitor *v;
-    QCryptoBlockCreateOptions *ret = NULL;
-    Error *local_err = NULL;
-
-    ret = g_new0(QCryptoBlockCreateOptions, 1);
-    ret->format = format;
-
-    v = opts_visitor_new(opts);
-
-    visit_start_struct(v, NULL, NULL, 0, &local_err);
-    if (local_err) {
-        goto out;
-    }
-
-    switch (format) {
-    case Q_CRYPTO_BLOCK_FORMAT_LUKS:
-        visit_type_QCryptoBlockCreateOptionsLUKS_members(
-            v, &ret->u.luks, &local_err);
-        break;
-
-    default:
-        error_setg(&local_err, "Unsupported block format %d", format);
-        break;
-    }
-    if (!local_err) {
-        visit_check_struct(v, &local_err);
-    }
-
-    visit_end_struct(v, NULL);
-
- out:
-    if (local_err) {
-        error_propagate(errp, local_err);
-        qapi_free_QCryptoBlockCreateOptions(ret);
-        ret = NULL;
-    }
-    visit_free(v);
-    return ret;
-}
-
-
-static int block_crypto_open_generic(QCryptoBlockFormat format,
-                                     QemuOptsList *opts_spec,
-                                     BlockDriverState *bs,
-                                     QDict *options,
-                                     int flags,
-                                     Error **errp)
-{
-    BlockCrypto *crypto = bs->opaque;
-    QemuOpts *opts = NULL;
-    Error *local_err = NULL;
-    int ret = -EINVAL;
-    QCryptoBlockOpenOptions *open_opts = NULL;
-    unsigned int cflags = 0;
-
-    bs->file = bdrv_open_child(NULL, options, "file", bs, &child_file,
-                               false, errp);
-    if (!bs->file) {
-        return -EINVAL;
-    }
-
-    opts = qemu_opts_create(opts_spec, NULL, 0, &error_abort);
-    qemu_opts_absorb_qdict(opts, options, &local_err);
-    if (local_err) {
-        error_propagate(errp, local_err);
-        goto cleanup;
-    }
-
-    open_opts = block_crypto_open_opts_init(format, opts, errp);
-    if (!open_opts) {
-        goto cleanup;
-    }
-
-    if (flags & BDRV_O_NO_IO) {
-        cflags |= QCRYPTO_BLOCK_OPEN_NO_IO;
-    }
-    crypto->block = qcrypto_block_open(open_opts,
-                                       block_crypto_read_func,
-                                       bs,
-                                       cflags,
-                                       errp);
-
-    if (!crypto->block) {
-        ret = -EIO;
-        goto cleanup;
-    }
-
-    bs->encrypted = true;
-    bs->valid_key = true;
-
-    ret = 0;
- cleanup:
-    qapi_free_QCryptoBlockOpenOptions(open_opts);
-    return ret;
-}
-
-
-static int block_crypto_create_generic(QCryptoBlockFormat format,
-                                       const char *filename,
-                                       QemuOpts *opts,
-                                       Error **errp)
-{
-    int ret = -EINVAL;
-    QCryptoBlockCreateOptions *create_opts = NULL;
-    QCryptoBlock *crypto = NULL;
-    struct BlockCryptoCreateData data = {
-        .size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
-                         BDRV_SECTOR_SIZE),
-        .opts = opts,
-        .filename = filename,
-    };
-
-    create_opts = block_crypto_create_opts_init(format, opts, errp);
-    if (!create_opts) {
-        return -1;
-    }
-
-    crypto = qcrypto_block_create(create_opts,
-                                  block_crypto_init_func,
-                                  block_crypto_write_func,
-                                  &data,
-                                  errp);
-
-    if (!crypto) {
-        ret = -EIO;
-        goto cleanup;
-    }
-
-    ret = 0;
- cleanup:
-    qcrypto_block_free(crypto);
-    blk_unref(data.blk);
-    qapi_free_QCryptoBlockCreateOptions(create_opts);
-    return ret;
-}
-
-static int block_crypto_truncate(BlockDriverState *bs, int64_t offset)
-{
-    BlockCrypto *crypto = bs->opaque;
-    size_t payload_offset =
-        qcrypto_block_get_payload_offset(crypto->block);
-
-    offset += payload_offset;
-
-    return bdrv_truncate(bs->file, offset, NULL);
-}
-
-static void block_crypto_close(BlockDriverState *bs)
-{
-    BlockCrypto *crypto = bs->opaque;
-    qcrypto_block_free(crypto->block);
-}
-
-
-#define BLOCK_CRYPTO_MAX_SECTORS 32
-
-static coroutine_fn int
-block_crypto_co_readv(BlockDriverState *bs, int64_t sector_num,
-                      int remaining_sectors, QEMUIOVector *qiov)
-{
-    BlockCrypto *crypto = bs->opaque;
-    int cur_nr_sectors; /* number of sectors in current iteration */
-    uint64_t bytes_done = 0;
-    uint8_t *cipher_data = NULL;
-    QEMUIOVector hd_qiov;
-    int ret = 0;
-    size_t payload_offset =
-        qcrypto_block_get_payload_offset(crypto->block) / 512;
-
-    qemu_iovec_init(&hd_qiov, qiov->niov);
-
-    /* Bounce buffer so we have a linear mem region for
-     * entire sector. XXX optimize so we avoid bounce
-     * buffer in case that qiov->niov == 1
-     */
-    cipher_data =
-        qemu_try_blockalign(bs->file->bs, MIN(BLOCK_CRYPTO_MAX_SECTORS * 512,
-                                              qiov->size));
-    if (cipher_data == NULL) {
-        ret = -ENOMEM;
-        goto cleanup;
-    }
-
-    while (remaining_sectors) {
-        cur_nr_sectors = remaining_sectors;
-
-        if (cur_nr_sectors > BLOCK_CRYPTO_MAX_SECTORS) {
-            cur_nr_sectors = BLOCK_CRYPTO_MAX_SECTORS;
-        }
-
-        qemu_iovec_reset(&hd_qiov);
-        qemu_iovec_add(&hd_qiov, cipher_data, cur_nr_sectors * 512);
-
-        ret = bdrv_co_readv(bs->file,
-                            payload_offset + sector_num,
-                            cur_nr_sectors, &hd_qiov);
-        if (ret < 0) {
-            goto cleanup;
-        }
-
-        if (qcrypto_block_decrypt(crypto->block,
-                                  sector_num,
-                                  cipher_data, cur_nr_sectors * 512,
-                                  NULL) < 0) {
-            ret = -EIO;
-            goto cleanup;
-        }
-
-        qemu_iovec_from_buf(qiov, bytes_done,
-                            cipher_data, cur_nr_sectors * 512);
-
-        remaining_sectors -= cur_nr_sectors;
-        sector_num += cur_nr_sectors;
-        bytes_done += cur_nr_sectors * 512;
-    }
-
- cleanup:
-    qemu_iovec_destroy(&hd_qiov);
-    qemu_vfree(cipher_data);
-
-    return ret;
-}
-
-
-static coroutine_fn int
-block_crypto_co_writev(BlockDriverState *bs, int64_t sector_num,
-                       int remaining_sectors, QEMUIOVector *qiov)
-{
-    BlockCrypto *crypto = bs->opaque;
-    int cur_nr_sectors; /* number of sectors in current iteration */
-    uint64_t bytes_done = 0;
-    uint8_t *cipher_data = NULL;
-    QEMUIOVector hd_qiov;
-    int ret = 0;
-    size_t payload_offset =
-        qcrypto_block_get_payload_offset(crypto->block) / 512;
-
-    qemu_iovec_init(&hd_qiov, qiov->niov);
-
-    /* Bounce buffer so we have a linear mem region for
-     * entire sector. XXX optimize so we avoid bounce
-     * buffer in case that qiov->niov == 1
-     */
-    cipher_data =
-        qemu_try_blockalign(bs->file->bs, MIN(BLOCK_CRYPTO_MAX_SECTORS * 512,
-                                              qiov->size));
-    if (cipher_data == NULL) {
-        ret = -ENOMEM;
-        goto cleanup;
-    }
-
-    while (remaining_sectors) {
-        cur_nr_sectors = remaining_sectors;
-
-        if (cur_nr_sectors > BLOCK_CRYPTO_MAX_SECTORS) {
-            cur_nr_sectors = BLOCK_CRYPTO_MAX_SECTORS;
-        }
-
-        qemu_iovec_to_buf(qiov, bytes_done,
-                          cipher_data, cur_nr_sectors * 512);
-
-        if (qcrypto_block_encrypt(crypto->block,
-                                  sector_num,
-                                  cipher_data, cur_nr_sectors * 512,
-                                  NULL) < 0) {
-            ret = -EIO;
-            goto cleanup;
-        }
-
-        qemu_iovec_reset(&hd_qiov);
-        qemu_iovec_add(&hd_qiov, cipher_data, cur_nr_sectors * 512);
-
-        ret = bdrv_co_writev(bs->file,
-                             payload_offset + sector_num,
-                             cur_nr_sectors, &hd_qiov);
-        if (ret < 0) {
-            goto cleanup;
-        }
-
-        remaining_sectors -= cur_nr_sectors;
-        sector_num += cur_nr_sectors;
-        bytes_done += cur_nr_sectors * 512;
-    }
-
- cleanup:
-    qemu_iovec_destroy(&hd_qiov);
-    qemu_vfree(cipher_data);
-
-    return ret;
-}
-
-
-static int64_t block_crypto_getlength(BlockDriverState *bs)
-{
-    BlockCrypto *crypto = bs->opaque;
-    int64_t len = bdrv_getlength(bs->file->bs);
-
-    ssize_t offset = qcrypto_block_get_payload_offset(crypto->block);
-
-    len -= offset;
-
-    return len;
-}
-
-
-static int block_crypto_probe_luks(const uint8_t *buf,
-                                   int buf_size,
-                                   const char *filename) {
-    return block_crypto_probe_generic(Q_CRYPTO_BLOCK_FORMAT_LUKS,
-                                      buf, buf_size, filename);
-}
-
-static int block_crypto_open_luks(BlockDriverState *bs,
-                                  QDict *options,
-                                  int flags,
-                                  Error **errp)
-{
-    return block_crypto_open_generic(Q_CRYPTO_BLOCK_FORMAT_LUKS,
-                                     &block_crypto_runtime_opts_luks,
-                                     bs, options, flags, errp);
-}
-
-static int block_crypto_create_luks(const char *filename,
-                                    QemuOpts *opts,
-                                    Error **errp)
-{
-    return block_crypto_create_generic(Q_CRYPTO_BLOCK_FORMAT_LUKS,
-                                       filename, opts, errp);
-}
-
-static int block_crypto_get_info_luks(BlockDriverState *bs,
-                                      BlockDriverInfo *bdi)
-{
-    BlockDriverInfo subbdi;
-    int ret;
-
-    ret = bdrv_get_info(bs->file->bs, &subbdi);
-    if (ret != 0) {
-        return ret;
-    }
-
-    bdi->unallocated_blocks_are_zero = false;
-    bdi->can_write_zeroes_with_unmap = false;
-    bdi->cluster_size = subbdi.cluster_size;
-
-    return 0;
-}
-
-static ImageInfoSpecific *
-block_crypto_get_specific_info_luks(BlockDriverState *bs)
-{
-    BlockCrypto *crypto = bs->opaque;
-    ImageInfoSpecific *spec_info;
-    QCryptoBlockInfo *info;
-
-    info = qcrypto_block_get_info(crypto->block, NULL);
-    if (!info) {
-        return NULL;
-    }
-    if (info->format != Q_CRYPTO_BLOCK_FORMAT_LUKS) {
-        qapi_free_QCryptoBlockInfo(info);
-        return NULL;
-    }
-
-    spec_info = g_new(ImageInfoSpecific, 1);
-    spec_info->type = IMAGE_INFO_SPECIFIC_KIND_LUKS;
-    spec_info->u.luks.data = g_new(QCryptoBlockInfoLUKS, 1);
-    *spec_info->u.luks.data = info->u.luks;
-
-    /* Blank out pointers we've just stolen to avoid double free */
-    memset(&info->u.luks, 0, sizeof(info->u.luks));
-
-    qapi_free_QCryptoBlockInfo(info);
-
-    return spec_info;
-}
-
-BlockDriver bdrv_crypto_luks = {
-    .format_name        = "luks",
-    .instance_size      = sizeof(BlockCrypto),
-    .bdrv_probe         = block_crypto_probe_luks,
-    .bdrv_open          = block_crypto_open_luks,
-    .bdrv_close         = block_crypto_close,
-    .bdrv_child_perm    = bdrv_format_default_perms,
-    .bdrv_create        = block_crypto_create_luks,
-    .bdrv_truncate      = block_crypto_truncate,
-    .create_opts        = &block_crypto_create_opts_luks,
-
-    .bdrv_co_readv      = block_crypto_co_readv,
-    .bdrv_co_writev     = block_crypto_co_writev,
-    .bdrv_getlength     = block_crypto_getlength,
-    .bdrv_get_info      = block_crypto_get_info_luks,
-    .bdrv_get_specific_info = block_crypto_get_specific_info_luks,
-};
-
-static void block_crypto_init(void)
-{
-    bdrv_register(&bdrv_crypto_luks);
-}
-
-block_init(block_crypto_init);
@@ -21,31 +21,21 @@
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
-#include "qemu/osdep.h"
-#include "qapi/error.h"
 #include "qemu-common.h"
 #include "qemu/error-report.h"
 #include "block/block_int.h"
 #include "qapi/qmp/qbool.h"
 #include "qapi/qmp/qstring.h"
-#include "crypto/secret.h"
 #include <curl/curl.h>
-#include "qemu/cutils.h"

 // #define DEBUG_CURL
 // #define DEBUG_VERBOSE

 #ifdef DEBUG_CURL
-#define DEBUG_CURL_PRINT 1
+#define DPRINTF(fmt, ...) do { printf(fmt, ## __VA_ARGS__); } while (0)
 #else
-#define DEBUG_CURL_PRINT 0
+#define DPRINTF(fmt, ...) do { } while (0)
 #endif
-#define DPRINTF(fmt, ...)                                            \
-    do {                                                             \
-        if (DEBUG_CURL_PRINT) {                                      \
-            fprintf(stderr, fmt, ## __VA_ARGS__);                    \
-        }                                                            \
-    } while (0)

 #if LIBCURL_VERSION_NUM >= 0x071000
 /* The multi interface timer callback was introduced in 7.16.0 */
@@ -68,10 +58,12 @@ static CURLMcode __curl_multi_socket_action(CURLM *multi_handle,
 #endif

 #define PROTOCOLS (CURLPROTO_HTTP | CURLPROTO_HTTPS | \
-                   CURLPROTO_FTP | CURLPROTO_FTPS)
+                   CURLPROTO_FTP | CURLPROTO_FTPS | \
+                   CURLPROTO_TFTP)

 #define CURL_NUM_STATES 8
 #define CURL_NUM_ACB    8
+#define SECTOR_SIZE     512
 #define READ_AHEAD_DEFAULT (256 * 1024)
 #define CURL_TIMEOUT_DEFAULT 5
 #define CURL_TIMEOUT_MAX 10000
@@ -85,15 +77,12 @@ static CURLMcode __curl_multi_socket_action(CURLM *multi_handle,
 #define CURL_BLOCK_OPT_SSLVERIFY "sslverify"
 #define CURL_BLOCK_OPT_TIMEOUT "timeout"
 #define CURL_BLOCK_OPT_COOKIE    "cookie"
-#define CURL_BLOCK_OPT_USERNAME "username"
-#define CURL_BLOCK_OPT_PASSWORD_SECRET "password-secret"
-#define CURL_BLOCK_OPT_PROXY_USERNAME "proxy-username"
-#define CURL_BLOCK_OPT_PROXY_PASSWORD_SECRET "proxy-password-secret"

 struct BDRVCURLState;

 typedef struct CURLAIOCB {
    BlockAIOCB common;
+    QEMUBH *bh;
    QEMUIOVector *qiov;

    int64_t sector_num;
@@ -103,17 +92,12 @@ typedef struct CURLAIOCB {
    size_t end;
 } CURLAIOCB;

-typedef struct CURLSocket {
-    int fd;
-    QLIST_ENTRY(CURLSocket) next;
-} CURLSocket;
-
 typedef struct CURLState
 {
    struct BDRVCURLState *s;
    CURLAIOCB *acb[CURL_NUM_ACB];
    CURL *curl;
-    QLIST_HEAD(, CURLSocket) sockets;
+    curl_socket_t sock_fd;
    char *orig_buf;
    size_t buf_start;
    size_t buf_off;
@@ -135,11 +119,6 @@ typedef struct BDRVCURLState {
    char *cookie;
    bool accept_range;
    AioContext *aio_context;
-    QemuMutex mutex;
-    char *username;
-    char *password;
-    char *proxyusername;
-    char *proxypassword;
 } BDRVCURLState;

 static void curl_clean_state(CURLState *s);
@@ -147,7 +126,6 @@ static void curl_multi_do(void *arg);
 static void curl_multi_read(void *arg);

 #ifdef NEED_CURL_TIMER_CALLBACK
-/* Called from curl_multi_do_locked, with s->mutex held.  */
 static int curl_timer_cb(CURLM *multi, long timeout_ms, void *opaque)
 {
    BDRVCURLState *s = opaque;
@@ -164,57 +142,36 @@ static int curl_timer_cb(CURLM *multi, long timeout_ms, void *opaque)
 }
 #endif

-/* Called from curl_multi_do_locked, with s->mutex held.  */
 static int curl_sock_cb(CURL *curl, curl_socket_t fd, int action,
                        void *userp, void *sp)
 {
    BDRVCURLState *s;
    CURLState *state = NULL;
-    CURLSocket *socket;
-
    curl_easy_getinfo(curl, CURLINFO_PRIVATE, (char **)&state);
+    state->sock_fd = fd;
    s = state->s;

-    QLIST_FOREACH(socket, &state->sockets, next) {
-        if (socket->fd == fd) {
-            if (action == CURL_POLL_REMOVE) {
-                QLIST_REMOVE(socket, next);
-                g_free(socket);
-            }
-            break;
-        }
-    }
-    if (!socket) {
-        socket = g_new0(CURLSocket, 1);
-        socket->fd = fd;
-        QLIST_INSERT_HEAD(&state->sockets, socket, next);
-    }
-    socket = NULL;
-
-    DPRINTF("CURL (AIO): Sock action %d on fd %d\n", action, (int)fd);
+    DPRINTF("CURL (AIO): Sock action %d on fd %d\n", action, fd);
    switch (action) {
        case CURL_POLL_IN:
-            aio_set_fd_handler(s->aio_context, fd, false,
-                               curl_multi_read, NULL, NULL, state);
+            aio_set_fd_handler(s->aio_context, fd, curl_multi_read,
+                               NULL, state);
            break;
        case CURL_POLL_OUT:
-            aio_set_fd_handler(s->aio_context, fd, false,
-                               NULL, curl_multi_do, NULL, state);
+            aio_set_fd_handler(s->aio_context, fd, NULL, curl_multi_do, state);
            break;
        case CURL_POLL_INOUT:
-            aio_set_fd_handler(s->aio_context, fd, false,
-                               curl_multi_read, curl_multi_do, NULL, state);
+            aio_set_fd_handler(s->aio_context, fd, curl_multi_read,
+                               curl_multi_do, state);
            break;
        case CURL_POLL_REMOVE:
-            aio_set_fd_handler(s->aio_context, fd, false,
-                               NULL, NULL, NULL, NULL);
+            aio_set_fd_handler(s->aio_context, fd, NULL, NULL, NULL);
            break;
    }

    return 0;
 }

-/* Called from curl_multi_do_locked, with s->mutex held.  */
 static size_t curl_header_cb(void *ptr, size_t size, size_t nmemb, void *opaque)
 {
    BDRVCURLState *s = opaque;
@@ -229,7 +186,6 @@ static size_t curl_header_cb(void *ptr, size_t size, size_t nmemb, void *opaque)
    return realsize;
 }

-/* Called from curl_multi_do_locked, with s->mutex held.  */
 static size_t curl_read_cb(void *ptr, size_t size, size_t nmemb, void *opaque)
 {
    CURLState *s = ((CURLState*)opaque);
@@ -238,13 +194,12 @@ static size_t curl_read_cb(void *ptr, size_t size, size_t nmemb, void *opaque)

    DPRINTF("CURL: Just reading %zd bytes\n", realsize);

-    if (!s || !s->orig_buf) {
-        goto read_end;
-    }
+    if (!s || !s->orig_buf)
+        return 0;

    if (s->buf_off >= s->buf_len) {
        /* buffer full, read nothing */
-        goto read_end;
+        return 0;
    }
    realsize = MIN(realsize, s->buf_len - s->buf_off);
    memcpy(s->orig_buf + s->buf_off, ptr, realsize);
@@ -257,38 +212,22 @@ static size_t curl_read_cb(void *ptr, size_t size, size_t nmemb, void *opaque)
            continue;

        if ((s->buf_off >= acb->end)) {
-            size_t request_length = acb->nb_sectors * BDRV_SECTOR_SIZE;
-
            qemu_iovec_from_buf(acb->qiov, 0, s->orig_buf + acb->start,
                                acb->end - acb->start);
-
-            if (acb->end - acb->start < request_length) {
-                size_t offset = acb->end - acb->start;
-                qemu_iovec_memset(acb->qiov, offset, 0,
-                                  request_length - offset);
-            }
-
-            qemu_mutex_unlock(&s->s->mutex);
            acb->common.cb(acb->common.opaque, 0);
-            qemu_mutex_lock(&s->s->mutex);
            qemu_aio_unref(acb);
            s->acb[i] = NULL;
        }
    }

-read_end:
-    /* curl will error out if we do not return this value */
-    return size * nmemb;
+    return realsize;
 }

-/* Called with s->mutex held.  */
 static int curl_find_buf(BDRVCURLState *s, size_t start, size_t len,
                         CURLAIOCB *acb)
 {
    int i;
    size_t end = start + len;
-    size_t clamped_end = MIN(end, s->len);
-    size_t clamped_len = clamped_end - start;

    for (i=0; i<CURL_NUM_STATES; i++) {
        CURLState *state = &s->states[i];
@@ -303,15 +242,14 @@ static int curl_find_buf(BDRVCURLState *s, size_t start, size_t len,
        // Does the existing buffer cover our section?
        if ((start >= state->buf_start) &&
            (start <= buf_end) &&
-            (clamped_end >= state->buf_start) &&
-            (clamped_end <= buf_end))
+            (end >= state->buf_start) &&
+            (end <= buf_end))
        {
            char *buf = state->orig_buf + (start - state->buf_start);

-            qemu_iovec_from_buf(acb->qiov, 0, buf, clamped_len);
-            if (clamped_len < len) {
-                qemu_iovec_memset(acb->qiov, clamped_len, 0, len - clamped_len);
-            }
+            qemu_iovec_from_buf(acb->qiov, 0, buf, len);
+            acb->common.cb(acb->common.opaque, 0);
+
            return FIND_RET_OK;
        }

@@ -319,13 +257,13 @@ static int curl_find_buf(BDRVCURLState *s, size_t start, size_t len,
        if (state->in_use &&
            (start >= state->buf_start) &&
            (start <= buf_fend) &&
-            (clamped_end >= state->buf_start) &&
-            (clamped_end <= buf_fend))
+            (end >= state->buf_start) &&
+            (end <= buf_fend))
        {
            int j;

            acb->start = start - state->buf_start;
-            acb->end = acb->start + clamped_len;
+            acb->end = acb->start + len;

            for (j=0; j<CURL_NUM_ACB; j++) {
                if (!state->acb[j]) {
@@ -339,7 +277,6 @@ static int curl_find_buf(BDRVCURLState *s, size_t start, size_t len,
    return FIND_RET_NONE;
 }

-/* Called with s->mutex held.  */
 static void curl_multi_check_completion(BDRVCURLState *s)
 {
    int msgs_in_queue;
@@ -381,9 +318,7 @@ static void curl_multi_check_completion(BDRVCURLState *s)
                        continue;
                    }

-                    qemu_mutex_unlock(&s->mutex);
-                    acb->common.cb(acb->common.opaque, -EIO);
-                    qemu_mutex_lock(&s->mutex);
+                    acb->common.cb(acb->common.opaque, -EPROTO);
                    qemu_aio_unref(acb);
                    state->acb[i] = NULL;
                }
@@ -395,10 +330,9 @@ static void curl_multi_check_completion(BDRVCURLState *s)
    }
 }

-/* Called with s->mutex held.  */
-static void curl_multi_do_locked(CURLState *s)
+static void curl_multi_do(void *arg)
 {
-    CURLSocket *socket, *next_socket;
+    CURLState *s = (CURLState *)arg;
    int running;
    int r;

@@ -406,32 +340,18 @@ static void curl_multi_do_locked(CURLState *s)
        return;
    }

-    /* Need to use _SAFE because curl_multi_socket_action() may trigger
-     * curl_sock_cb() which might modify this list */
-    QLIST_FOREACH_SAFE(socket, &s->sockets, next, next_socket) {
-        do {
-            r = curl_multi_socket_action(s->s->multi, socket->fd, 0, &running);
-        } while (r == CURLM_CALL_MULTI_PERFORM);
-    }
-}
+    do {
+        r = curl_multi_socket_action(s->s->multi, s->sock_fd, 0, &running);
+    } while(r == CURLM_CALL_MULTI_PERFORM);

-static void curl_multi_do(void *arg)
-{
-    CURLState *s = (CURLState *)arg;
-
-    qemu_mutex_lock(&s->s->mutex);
-    curl_multi_do_locked(s);
-    qemu_mutex_unlock(&s->s->mutex);
 }

 static void curl_multi_read(void *arg)
 {
    CURLState *s = (CURLState *)arg;

-    qemu_mutex_lock(&s->s->mutex);
-    curl_multi_do_locked(s);
+    curl_multi_do(arg);
    curl_multi_check_completion(s->s);
-    qemu_mutex_unlock(&s->s->mutex);
 }

 static void curl_multi_timeout_do(void *arg)
@@ -444,17 +364,14 @@ static void curl_multi_timeout_do(void *arg)
        return;
    }

-    qemu_mutex_lock(&s->mutex);
    curl_multi_socket_action(s->multi, CURL_SOCKET_TIMEOUT, 0, &running);

    curl_multi_check_completion(s);
-    qemu_mutex_unlock(&s->mutex);
 #else
    abort();
 #endif
 }

-/* Called with s->mutex held.  */
 static CURLState *curl_init_state(BlockDriverState *bs, BDRVCURLState *s)
 {
    CURLState *state = NULL;
@@ -473,9 +390,7 @@ static CURLState *curl_init_state(BlockDriverState *bs, BDRVCURLState *s)
            break;
        }
        if (!state) {
-            qemu_mutex_unlock(&s->mutex);
            aio_poll(bdrv_get_aio_context(bs), true);
-            qemu_mutex_lock(&s->mutex);
        }
    } while(!state);

@@ -501,21 +416,6 @@ static CURLState *curl_init_state(BlockDriverState *bs, BDRVCURLState *s)
        curl_easy_setopt(state->curl, CURLOPT_ERRORBUFFER, state->errmsg);
        curl_easy_setopt(state->curl, CURLOPT_FAILONERROR, 1);

-        if (s->username) {
-            curl_easy_setopt(state->curl, CURLOPT_USERNAME, s->username);
-        }
-        if (s->password) {
-            curl_easy_setopt(state->curl, CURLOPT_PASSWORD, s->password);
-        }
-        if (s->proxyusername) {
-            curl_easy_setopt(state->curl,
-                             CURLOPT_PROXYUSERNAME, s->proxyusername);
-        }
-        if (s->proxypassword) {
-            curl_easy_setopt(state->curl,
-                             CURLOPT_PROXYPASSWORD, s->proxypassword);
-        }
-
        /* Restrict supported protocols to avoid security issues in the more
         * obscure protocols.  For example, do not allow POP3/SMTP/IMAP see
         * CVE-2013-0249.
@@ -532,37 +432,22 @@ static CURLState *curl_init_state(BlockDriverState *bs, BDRVCURLState *s)
 #endif
    }

-    QLIST_INIT(&state->sockets);
    state->s = s;

    return state;
 }

-/* Called with s->mutex held.  */
 static void curl_clean_state(CURLState *s)
 {
-    int j;
-    for (j = 0; j < CURL_NUM_ACB; j++) {
-        assert(!s->acb[j]);
-    }
-
    if (s->s->multi)
        curl_multi_remove_handle(s->s->multi, s->curl);
-
-    while (!QLIST_EMPTY(&s->sockets)) {
-        CURLSocket *socket = QLIST_FIRST(&s->sockets);
-
-        QLIST_REMOVE(socket, next);
-        g_free(socket);
-    }
-
    s->in_use = 0;
 }

 static void curl_parse_filename(const char *filename, QDict *options,
                                Error **errp)
 {
-    qdict_put_str(options, CURL_BLOCK_OPT_URL, filename);
+    qdict_put(options, CURL_BLOCK_OPT_URL, qstring_from_str(filename));
 }

 static void curl_detach_aio_context(BlockDriverState *bs)
@@ -570,7 +455,6 @@ static void curl_detach_aio_context(BlockDriverState *bs)
    BDRVCURLState *s = bs->opaque;
    int i;

-    qemu_mutex_lock(&s->mutex);
    for (i = 0; i < CURL_NUM_STATES; i++) {
        if (s->states[i].in_use) {
            curl_clean_state(&s->states[i]);
@@ -586,7 +470,6 @@ static void curl_detach_aio_context(BlockDriverState *bs)
        curl_multi_cleanup(s->multi);
        s->multi = NULL;
    }
-    qemu_mutex_unlock(&s->mutex);

    timer_del(&s->timer);
 }
@@ -639,31 +522,10 @@ static QemuOptsList runtime_opts = {
            .type = QEMU_OPT_STRING,
            .help = "Pass the cookie or list of cookies with each request"
        },
-        {
-            .name = CURL_BLOCK_OPT_USERNAME,
-            .type = QEMU_OPT_STRING,
-            .help = "Username for HTTP auth"
-        },
-        {
-            .name = CURL_BLOCK_OPT_PASSWORD_SECRET,
-            .type = QEMU_OPT_STRING,
-            .help = "ID of secret used as password for HTTP auth",
-        },
-        {
-            .name = CURL_BLOCK_OPT_PROXY_USERNAME,
-            .type = QEMU_OPT_STRING,
-            .help = "Username for HTTP proxy auth"
-        },
-        {
-            .name = CURL_BLOCK_OPT_PROXY_PASSWORD_SECRET,
-            .type = QEMU_OPT_STRING,
-            .help = "ID of secret used as password for HTTP proxy auth",
-        },
        { /* end of list */ }
    },
 };

-
 static int curl_open(BlockDriverState *bs, QDict *options, int flags,
                     Error **errp)
 {
@@ -674,8 +536,6 @@ static int curl_open(BlockDriverState *bs, QDict *options, int flags,
    const char *file;
    const char *cookie;
    double d;
-    const char *secretid;
-    const char *protocol_delimiter;

    static int inited = 0;

@@ -684,7 +544,6 @@ static int curl_open(BlockDriverState *bs, QDict *options, int flags,
        return -EROFS;
    }

-    qemu_mutex_init(&s->mutex);
    opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort);
    qemu_opts_absorb_qdict(opts, options, &local_err);
    if (local_err) {
@@ -718,35 +577,6 @@ static int curl_open(BlockDriverState *bs, QDict *options, int flags,
        goto out_noclean;
    }

-    if (!strstart(file, bs->drv->protocol_name, &protocol_delimiter) ||
-        !strstart(protocol_delimiter, "://", NULL))
-    {
-        error_setg(errp, "%s curl driver cannot handle the URL '%s' (does not "
-                   "start with '%s://')", bs->drv->protocol_name, file,
-                   bs->drv->protocol_name);
-        goto out_noclean;
-    }
-
-    s->username = g_strdup(qemu_opt_get(opts, CURL_BLOCK_OPT_USERNAME));
-    secretid = qemu_opt_get(opts, CURL_BLOCK_OPT_PASSWORD_SECRET);
-
-    if (secretid) {
-        s->password = qcrypto_secret_lookup_as_utf8(secretid, errp);
-        if (!s->password) {
-            goto out_noclean;
-        }
-    }
-
-    s->proxyusername = g_strdup(
-        qemu_opt_get(opts, CURL_BLOCK_OPT_PROXY_USERNAME));
-    secretid = qemu_opt_get(opts, CURL_BLOCK_OPT_PROXY_PASSWORD_SECRET);
-    if (secretid) {
-        s->proxypassword = qcrypto_secret_lookup_as_utf8(secretid, errp);
-        if (!s->proxypassword) {
-            goto out_noclean;
-        }
-    }
-
    if (!inited) {
        curl_global_init(CURL_GLOBAL_ALL);
        inited = 1;
@@ -755,9 +585,7 @@ static int curl_open(BlockDriverState *bs, QDict *options, int flags,
    DPRINTF("CURL: Opening %s\n", file);
    s->aio_context = bdrv_get_aio_context(bs);
    s->url = g_strdup(file);
-    qemu_mutex_lock(&s->mutex);
    state = curl_init_state(bs, s);
-    qemu_mutex_unlock(&s->mutex);
    if (!state)
        goto out_noclean;

@@ -770,28 +598,11 @@ static int curl_open(BlockDriverState *bs, QDict *options, int flags,
    curl_easy_setopt(state->curl, CURLOPT_HEADERDATA, s);
    if (curl_easy_perform(state->curl))
        goto out;
-    if (curl_easy_getinfo(state->curl, CURLINFO_CONTENT_LENGTH_DOWNLOAD, &d)) {
+    curl_easy_getinfo(state->curl, CURLINFO_CONTENT_LENGTH_DOWNLOAD, &d);
+    if (d)
+        s->len = (size_t)d;
+    else if(!s->len)
        goto out;
-    }
-    /* Prior CURL 7.19.4 return value of 0 could mean that the file size is not
-     * know or the size is zero. From 7.19.4 CURL returns -1 if size is not
-     * known and zero if it is realy zero-length file. */
-#if LIBCURL_VERSION_NUM >= 0x071304
-    if (d < 0) {
-        pstrcpy(state->errmsg, CURL_ERROR_SIZE,
-                "Server didn't report file size.");
-        goto out;
-    }
-#else
-    if (d <= 0) {
-        pstrcpy(state->errmsg, CURL_ERROR_SIZE,
-                "Unknown file size or zero-length file.");
-        goto out;
-    }
-#endif
-
-    s->len = (size_t)d;
-
    if ((!strncasecmp(s->url, "http://", strlen("http://"))
        || !strncasecmp(s->url, "https://", strlen("https://")))
        && !s->accept_range) {
@@ -801,9 +612,7 @@ static int curl_open(BlockDriverState *bs, QDict *options, int flags,
    }
    DPRINTF("CURL: Size = %zd\n", s->len);

-    qemu_mutex_lock(&s->mutex);
    curl_clean_state(state);
-    qemu_mutex_unlock(&s->mutex);
    curl_easy_cleanup(state->curl);
    state->curl = NULL;

@@ -817,7 +626,6 @@ out:
    curl_easy_cleanup(state->curl);
    state->curl = NULL;
 out_noclean:
-    qemu_mutex_destroy(&s->mutex);
    g_free(s->cookie);
    g_free(s->url);
    qemu_opts_del(opts);
@@ -833,25 +641,24 @@ static void curl_readv_bh_cb(void *p)
 {
    CURLState *state;
    int running;
-    int ret = -EINPROGRESS;

    CURLAIOCB *acb = p;
-    BlockDriverState *bs = acb->common.bs;
-    BDRVCURLState *s = bs->opaque;
+    BDRVCURLState *s = acb->common.bs->opaque;

-    size_t start = acb->sector_num * BDRV_SECTOR_SIZE;
+    qemu_bh_delete(acb->bh);
+    acb->bh = NULL;
+
+    size_t start = acb->sector_num * SECTOR_SIZE;
    size_t end;

-    qemu_mutex_lock(&s->mutex);
-
    // In case we have the requested data already (e.g. read-ahead),
    // we can just call the callback and be done.
-    switch (curl_find_buf(s, start, acb->nb_sectors * BDRV_SECTOR_SIZE, acb)) {
+    switch (curl_find_buf(s, start, acb->nb_sectors * SECTOR_SIZE, acb)) {
        case FIND_RET_OK:
-            ret = 0;
-            goto out;
+            qemu_aio_unref(acb);
+            // fall through
        case FIND_RET_WAIT:
-            goto out;
+            return;
        default:
            break;
    }
@@ -859,42 +666,37 @@ static void curl_readv_bh_cb(void *p)
    // No cache found, so let's start a new request
    state = curl_init_state(acb->common.bs, s);
    if (!state) {
-        ret = -EIO;
-        goto out;
+        acb->common.cb(acb->common.opaque, -EIO);
+        qemu_aio_unref(acb);
+        return;
    }

    acb->start = 0;
-    acb->end = MIN(acb->nb_sectors * BDRV_SECTOR_SIZE, s->len - start);
+    acb->end = (acb->nb_sectors * SECTOR_SIZE);

    state->buf_off = 0;
    g_free(state->orig_buf);
    state->buf_start = start;
-    state->buf_len = MIN(acb->end + s->readahead_size, s->len - start);
-    end = start + state->buf_len - 1;
+    state->buf_len = acb->end + s->readahead_size;
+    end = MIN(start + state->buf_len, s->len) - 1;
    state->orig_buf = g_try_malloc(state->buf_len);
    if (state->buf_len && state->orig_buf == NULL) {
        curl_clean_state(state);
-        ret = -ENOMEM;
-        goto out;
+        acb->common.cb(acb->common.opaque, -ENOMEM);
+        qemu_aio_unref(acb);
+        return;
    }
    state->acb[0] = acb;

    snprintf(state->range, 127, "%zd-%zd", start, end);
-    DPRINTF("CURL (AIO): Reading %llu at %zd (%s)\n",
-            (acb->nb_sectors * BDRV_SECTOR_SIZE), start, state->range);
+    DPRINTF("CURL (AIO): Reading %d at %zd (%s)\n",
+            (acb->nb_sectors * SECTOR_SIZE), start, state->range);
    curl_easy_setopt(state->curl, CURLOPT_RANGE, state->range);

    curl_multi_add_handle(s->multi, state->curl);

    /* Tell curl it needs to kick things off */
    curl_multi_socket_action(s->multi, CURL_SOCKET_TIMEOUT, 0, &running);
-
-out:
-    qemu_mutex_unlock(&s->mutex);
-    if (ret != -EINPROGRESS) {
-        acb->common.cb(acb->common.opaque, ret);
-        qemu_aio_unref(acb);
-    }
 }

 static BlockAIOCB *curl_aio_readv(BlockDriverState *bs,
@@ -909,7 +711,8 @@ static BlockAIOCB *curl_aio_readv(BlockDriverState *bs,
    acb->sector_num = sector_num;
    acb->nb_sectors = nb_sectors;

-    aio_bh_schedule_oneshot(bdrv_get_aio_context(bs), curl_readv_bh_cb, acb);
+    acb->bh = aio_bh_new(bdrv_get_aio_context(bs), curl_readv_bh_cb, acb);
+    qemu_bh_schedule(acb->bh);
    return &acb->common;
 }

@@ -919,7 +722,6 @@ static void curl_close(BlockDriverState *bs)

    DPRINTF("CURL: Close\n");
    curl_detach_aio_context(bs);
-    qemu_mutex_destroy(&s->mutex);

    g_free(s->cookie);
    g_free(s->url);
@@ -995,12 +797,29 @@ static BlockDriver bdrv_ftps = {
    .bdrv_attach_aio_context    = curl_attach_aio_context,
 };

+static BlockDriver bdrv_tftp = {
+    .format_name                = "tftp",
+    .protocol_name              = "tftp",
+
+    .instance_size              = sizeof(BDRVCURLState),
+    .bdrv_parse_filename        = curl_parse_filename,
+    .bdrv_file_open             = curl_open,
+    .bdrv_close                 = curl_close,
+    .bdrv_getlength             = curl_getlength,
+
+    .bdrv_aio_readv             = curl_aio_readv,
+
+    .bdrv_detach_aio_context    = curl_detach_aio_context,
+    .bdrv_attach_aio_context    = curl_attach_aio_context,
+};
+
 static void curl_block_init(void)
 {
    bdrv_register(&bdrv_http);
    bdrv_register(&bdrv_https);
    bdrv_register(&bdrv_ftp);
    bdrv_register(&bdrv_ftps);
+    bdrv_register(&bdrv_tftp);
 }

 block_init(curl_block_init);
@@ -1,535 +0,0 @@
-/*
- * Block Dirty Bitmap
- *
- * Copyright (c) 2016 Red Hat. Inc
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-#include "qemu/osdep.h"
-#include "qapi/error.h"
-#include "qemu-common.h"
-#include "trace.h"
-#include "block/block_int.h"
-#include "block/blockjob.h"
-
-/**
- * A BdrvDirtyBitmap can be in three possible states:
- * (1) successor is NULL and disabled is false: full r/w mode
- * (2) successor is NULL and disabled is true: read only mode ("disabled")
- * (3) successor is set: frozen mode.
- *     A frozen bitmap cannot be renamed, deleted, anonymized, cleared, set,
- *     or enabled. A frozen bitmap can only abdicate() or reclaim().
- */
-struct BdrvDirtyBitmap {
-    HBitmap *bitmap;            /* Dirty sector bitmap implementation */
-    HBitmap *meta;              /* Meta dirty bitmap */
-    BdrvDirtyBitmap *successor; /* Anonymous child; implies frozen status */
-    char *name;                 /* Optional non-empty unique ID */
-    int64_t size;               /* Size of the bitmap (Number of sectors) */
-    bool disabled;              /* Bitmap is read-only */
-    int active_iterators;       /* How many iterators are active */
-    QLIST_ENTRY(BdrvDirtyBitmap) list;
-};
-
-struct BdrvDirtyBitmapIter {
-    HBitmapIter hbi;
-    BdrvDirtyBitmap *bitmap;
-};
-
-BdrvDirtyBitmap *bdrv_find_dirty_bitmap(BlockDriverState *bs, const char *name)
-{
-    BdrvDirtyBitmap *bm;
-
-    assert(name);
-    QLIST_FOREACH(bm, &bs->dirty_bitmaps, list) {
-        if (bm->name && !strcmp(name, bm->name)) {
-            return bm;
-        }
-    }
-    return NULL;
-}
-
-void bdrv_dirty_bitmap_make_anon(BdrvDirtyBitmap *bitmap)
-{
-    assert(!bdrv_dirty_bitmap_frozen(bitmap));
-    g_free(bitmap->name);
-    bitmap->name = NULL;
-}
-
-BdrvDirtyBitmap *bdrv_create_dirty_bitmap(BlockDriverState *bs,
-                                          uint32_t granularity,
-                                          const char *name,
-                                          Error **errp)
-{
-    int64_t bitmap_size;
-    BdrvDirtyBitmap *bitmap;
-    uint32_t sector_granularity;
-
-    assert((granularity & (granularity - 1)) == 0);
-
-    if (name && bdrv_find_dirty_bitmap(bs, name)) {
-        error_setg(errp, "Bitmap already exists: %s", name);
-        return NULL;
-    }
-    sector_granularity = granularity >> BDRV_SECTOR_BITS;
-    assert(sector_granularity);
-    bitmap_size = bdrv_nb_sectors(bs);
-    if (bitmap_size < 0) {
-        error_setg_errno(errp, -bitmap_size, "could not get length of device");
-        errno = -bitmap_size;
-        return NULL;
-    }
-    bitmap = g_new0(BdrvDirtyBitmap, 1);
-    bitmap->bitmap = hbitmap_alloc(bitmap_size, ctz32(sector_granularity));
-    bitmap->size = bitmap_size;
-    bitmap->name = g_strdup(name);
-    bitmap->disabled = false;
-    QLIST_INSERT_HEAD(&bs->dirty_bitmaps, bitmap, list);
-    return bitmap;
-}
-
-/* bdrv_create_meta_dirty_bitmap
- *
- * Create a meta dirty bitmap that tracks the changes of bits in @bitmap. I.e.
- * when a dirty status bit in @bitmap is changed (either from reset to set or
- * the other way around), its respective meta dirty bitmap bit will be marked
- * dirty as well.
- *
- * @bitmap: the block dirty bitmap for which to create a meta dirty bitmap.
- * @chunk_size: how many bytes of bitmap data does each bit in the meta bitmap
- * track.
- */
-void bdrv_create_meta_dirty_bitmap(BdrvDirtyBitmap *bitmap,
-                                   int chunk_size)
-{
-    assert(!bitmap->meta);
-    bitmap->meta = hbitmap_create_meta(bitmap->bitmap,
-                                       chunk_size * BITS_PER_BYTE);
-}
-
-void bdrv_release_meta_dirty_bitmap(BdrvDirtyBitmap *bitmap)
-{
-    assert(bitmap->meta);
-    hbitmap_free_meta(bitmap->bitmap);
-    bitmap->meta = NULL;
-}
-
-int bdrv_dirty_bitmap_get_meta(BlockDriverState *bs,
-                               BdrvDirtyBitmap *bitmap, int64_t sector,
-                               int nb_sectors)
-{
-    uint64_t i;
-    int sectors_per_bit = 1 << hbitmap_granularity(bitmap->meta);
-
-    /* To optimize: we can make hbitmap to internally check the range in a
-     * coarse level, or at least do it word by word. */
-    for (i = sector; i < sector + nb_sectors; i += sectors_per_bit) {
-        if (hbitmap_get(bitmap->meta, i)) {
-            return true;
-        }
-    }
-    return false;
-}
-
-void bdrv_dirty_bitmap_reset_meta(BlockDriverState *bs,
-                                  BdrvDirtyBitmap *bitmap, int64_t sector,
-                                  int nb_sectors)
-{
-    hbitmap_reset(bitmap->meta, sector, nb_sectors);
-}
-
-int64_t bdrv_dirty_bitmap_size(const BdrvDirtyBitmap *bitmap)
-{
-    return bitmap->size;
-}
-
-const char *bdrv_dirty_bitmap_name(const BdrvDirtyBitmap *bitmap)
-{
-    return bitmap->name;
-}
-
-bool bdrv_dirty_bitmap_frozen(BdrvDirtyBitmap *bitmap)
-{
-    return bitmap->successor;
-}
-
-bool bdrv_dirty_bitmap_enabled(BdrvDirtyBitmap *bitmap)
-{
-    return !(bitmap->disabled || bitmap->successor);
-}
-
-DirtyBitmapStatus bdrv_dirty_bitmap_status(BdrvDirtyBitmap *bitmap)
-{
-    if (bdrv_dirty_bitmap_frozen(bitmap)) {
-        return DIRTY_BITMAP_STATUS_FROZEN;
-    } else if (!bdrv_dirty_bitmap_enabled(bitmap)) {
-        return DIRTY_BITMAP_STATUS_DISABLED;
-    } else {
-        return DIRTY_BITMAP_STATUS_ACTIVE;
-    }
-}
-
-/**
- * Create a successor bitmap destined to replace this bitmap after an operation.
- * Requires that the bitmap is not frozen and has no successor.
- */
-int bdrv_dirty_bitmap_create_successor(BlockDriverState *bs,
-                                       BdrvDirtyBitmap *bitmap, Error **errp)
-{
-    uint64_t granularity;
-    BdrvDirtyBitmap *child;
-
-    if (bdrv_dirty_bitmap_frozen(bitmap)) {
-        error_setg(errp, "Cannot create a successor for a bitmap that is "
-                   "currently frozen");
-        return -1;
-    }
-    assert(!bitmap->successor);
-
-    /* Create an anonymous successor */
-    granularity = bdrv_dirty_bitmap_granularity(bitmap);
-    child = bdrv_create_dirty_bitmap(bs, granularity, NULL, errp);
-    if (!child) {
-        return -1;
-    }
-
-    /* Successor will be on or off based on our current state. */
-    child->disabled = bitmap->disabled;
-
-    /* Install the successor and freeze the parent */
-    bitmap->successor = child;
-    return 0;
-}
-
-/**
- * For a bitmap with a successor, yield our name to the successor,
- * delete the old bitmap, and return a handle to the new bitmap.
- */
-BdrvDirtyBitmap *bdrv_dirty_bitmap_abdicate(BlockDriverState *bs,
-                                            BdrvDirtyBitmap *bitmap,
-                                            Error **errp)
-{
-    char *name;
-    BdrvDirtyBitmap *successor = bitmap->successor;
-
-    if (successor == NULL) {
-        error_setg(errp, "Cannot relinquish control if "
-                   "there's no successor present");
-        return NULL;
-    }
-
-    name = bitmap->name;
-    bitmap->name = NULL;
-    successor->name = name;
-    bitmap->successor = NULL;
-    bdrv_release_dirty_bitmap(bs, bitmap);
-
-    return successor;
-}
-
-/**
- * In cases of failure where we can no longer safely delete the parent,
- * we may wish to re-join the parent and child/successor.
- * The merged parent will be un-frozen, but not explicitly re-enabled.
- */
-BdrvDirtyBitmap *bdrv_reclaim_dirty_bitmap(BlockDriverState *bs,
-                                           BdrvDirtyBitmap *parent,
-                                           Error **errp)
-{
-    BdrvDirtyBitmap *successor = parent->successor;
-
-    if (!successor) {
-        error_setg(errp, "Cannot reclaim a successor when none is present");
-        return NULL;
-    }
-
-    if (!hbitmap_merge(parent->bitmap, successor->bitmap)) {
-        error_setg(errp, "Merging of parent and successor bitmap failed");
-        return NULL;
-    }
-    bdrv_release_dirty_bitmap(bs, successor);
-    parent->successor = NULL;
-
-    return parent;
-}
-
-/**
- * Truncates _all_ bitmaps attached to a BDS.
- */
-void bdrv_dirty_bitmap_truncate(BlockDriverState *bs)
-{
-    BdrvDirtyBitmap *bitmap;
-    uint64_t size = bdrv_nb_sectors(bs);
-
-    QLIST_FOREACH(bitmap, &bs->dirty_bitmaps, list) {
-        assert(!bdrv_dirty_bitmap_frozen(bitmap));
-        assert(!bitmap->active_iterators);
-        hbitmap_truncate(bitmap->bitmap, size);
-        bitmap->size = size;
-    }
-}
-
-static void bdrv_do_release_matching_dirty_bitmap(BlockDriverState *bs,
-                                                  BdrvDirtyBitmap *bitmap,
-                                                  bool only_named)
-{
-    BdrvDirtyBitmap *bm, *next;
-    QLIST_FOREACH_SAFE(bm, &bs->dirty_bitmaps, list, next) {
-        if ((!bitmap || bm == bitmap) && (!only_named || bm->name)) {
-            assert(!bm->active_iterators);
-            assert(!bdrv_dirty_bitmap_frozen(bm));
-            assert(!bm->meta);
-            QLIST_REMOVE(bm, list);
-            hbitmap_free(bm->bitmap);
-            g_free(bm->name);
-            g_free(bm);
-
-            if (bitmap) {
-                return;
-            }
-        }
-    }
-    if (bitmap) {
-        abort();
-    }
-}
-
-void bdrv_release_dirty_bitmap(BlockDriverState *bs, BdrvDirtyBitmap *bitmap)
-{
-    bdrv_do_release_matching_dirty_bitmap(bs, bitmap, false);
-}
-
-/**
- * Release all named dirty bitmaps attached to a BDS (for use in bdrv_close()).
- * There must not be any frozen bitmaps attached.
- */
-void bdrv_release_named_dirty_bitmaps(BlockDriverState *bs)
-{
-    bdrv_do_release_matching_dirty_bitmap(bs, NULL, true);
-}
-
-void bdrv_disable_dirty_bitmap(BdrvDirtyBitmap *bitmap)
-{
-    assert(!bdrv_dirty_bitmap_frozen(bitmap));
-    bitmap->disabled = true;
-}
-
-void bdrv_enable_dirty_bitmap(BdrvDirtyBitmap *bitmap)
-{
-    assert(!bdrv_dirty_bitmap_frozen(bitmap));
-    bitmap->disabled = false;
-}
-
-BlockDirtyInfoList *bdrv_query_dirty_bitmaps(BlockDriverState *bs)
-{
-    BdrvDirtyBitmap *bm;
-    BlockDirtyInfoList *list = NULL;
-    BlockDirtyInfoList **plist = &list;
-
-    QLIST_FOREACH(bm, &bs->dirty_bitmaps, list) {
-        BlockDirtyInfo *info = g_new0(BlockDirtyInfo, 1);
-        BlockDirtyInfoList *entry = g_new0(BlockDirtyInfoList, 1);
-        info->count = bdrv_get_dirty_count(bm) << BDRV_SECTOR_BITS;
-        info->granularity = bdrv_dirty_bitmap_granularity(bm);
-        info->has_name = !!bm->name;
-        info->name = g_strdup(bm->name);
-        info->status = bdrv_dirty_bitmap_status(bm);
-        entry->value = info;
-        *plist = entry;
-        plist = &entry->next;
-    }
-
-    return list;
-}
-
-int bdrv_get_dirty(BlockDriverState *bs, BdrvDirtyBitmap *bitmap,
-                   int64_t sector)
-{
-    if (bitmap) {
-        return hbitmap_get(bitmap->bitmap, sector);
-    } else {
-        return 0;
-    }
-}
-
-/**
- * Chooses a default granularity based on the existing cluster size,
- * but clamped between [4K, 64K]. Defaults to 64K in the case that there
- * is no cluster size information available.
- */
-uint32_t bdrv_get_default_bitmap_granularity(BlockDriverState *bs)
-{
-    BlockDriverInfo bdi;
-    uint32_t granularity;
-
-    if (bdrv_get_info(bs, &bdi) >= 0 && bdi.cluster_size > 0) {
-        granularity = MAX(4096, bdi.cluster_size);
-        granularity = MIN(65536, granularity);
-    } else {
-        granularity = 65536;
-    }
-
-    return granularity;
-}
-
-uint32_t bdrv_dirty_bitmap_granularity(BdrvDirtyBitmap *bitmap)
-{
-    return BDRV_SECTOR_SIZE << hbitmap_granularity(bitmap->bitmap);
-}
-
-uint32_t bdrv_dirty_bitmap_meta_granularity(BdrvDirtyBitmap *bitmap)
-{
-    return BDRV_SECTOR_SIZE << hbitmap_granularity(bitmap->meta);
-}
-
-BdrvDirtyBitmapIter *bdrv_dirty_iter_new(BdrvDirtyBitmap *bitmap,
-                                         uint64_t first_sector)
-{
-    BdrvDirtyBitmapIter *iter = g_new(BdrvDirtyBitmapIter, 1);
-    hbitmap_iter_init(&iter->hbi, bitmap->bitmap, first_sector);
-    iter->bitmap = bitmap;
-    bitmap->active_iterators++;
-    return iter;
-}
-
-BdrvDirtyBitmapIter *bdrv_dirty_meta_iter_new(BdrvDirtyBitmap *bitmap)
-{
-    BdrvDirtyBitmapIter *iter = g_new(BdrvDirtyBitmapIter, 1);
-    hbitmap_iter_init(&iter->hbi, bitmap->meta, 0);
-    iter->bitmap = bitmap;
-    bitmap->active_iterators++;
-    return iter;
-}
-
-void bdrv_dirty_iter_free(BdrvDirtyBitmapIter *iter)
-{
-    if (!iter) {
-        return;
-    }
-    assert(iter->bitmap->active_iterators > 0);
-    iter->bitmap->active_iterators--;
-    g_free(iter);
-}
-
-int64_t bdrv_dirty_iter_next(BdrvDirtyBitmapIter *iter)
-{
-    return hbitmap_iter_next(&iter->hbi);
-}
-
-void bdrv_set_dirty_bitmap(BdrvDirtyBitmap *bitmap,
-                           int64_t cur_sector, int64_t nr_sectors)
-{
-    assert(bdrv_dirty_bitmap_enabled(bitmap));
-    hbitmap_set(bitmap->bitmap, cur_sector, nr_sectors);
-}
-
-void bdrv_reset_dirty_bitmap(BdrvDirtyBitmap *bitmap,
-                             int64_t cur_sector, int64_t nr_sectors)
-{
-    assert(bdrv_dirty_bitmap_enabled(bitmap));
-    hbitmap_reset(bitmap->bitmap, cur_sector, nr_sectors);
-}
-
-void bdrv_clear_dirty_bitmap(BdrvDirtyBitmap *bitmap, HBitmap **out)
-{
-    assert(bdrv_dirty_bitmap_enabled(bitmap));
-    if (!out) {
-        hbitmap_reset_all(bitmap->bitmap);
-    } else {
-        HBitmap *backup = bitmap->bitmap;
-        bitmap->bitmap = hbitmap_alloc(bitmap->size,
-                                       hbitmap_granularity(backup));
-        *out = backup;
-    }
-}
-
-void bdrv_undo_clear_dirty_bitmap(BdrvDirtyBitmap *bitmap, HBitmap *in)
-{
-    HBitmap *tmp = bitmap->bitmap;
-    assert(bdrv_dirty_bitmap_enabled(bitmap));
-    bitmap->bitmap = in;
-    hbitmap_free(tmp);
-}
-
-uint64_t bdrv_dirty_bitmap_serialization_size(const BdrvDirtyBitmap *bitmap,
-                                              uint64_t start, uint64_t count)
-{
-    return hbitmap_serialization_size(bitmap->bitmap, start, count);
-}
-
-uint64_t bdrv_dirty_bitmap_serialization_align(const BdrvDirtyBitmap *bitmap)
-{
-    return hbitmap_serialization_granularity(bitmap->bitmap);
-}
-
-void bdrv_dirty_bitmap_serialize_part(const BdrvDirtyBitmap *bitmap,
-                                      uint8_t *buf, uint64_t start,
-                                      uint64_t count)
-{
-    hbitmap_serialize_part(bitmap->bitmap, buf, start, count);
-}
-
-void bdrv_dirty_bitmap_deserialize_part(BdrvDirtyBitmap *bitmap,
-                                        uint8_t *buf, uint64_t start,
-                                        uint64_t count, bool finish)
-{
-    hbitmap_deserialize_part(bitmap->bitmap, buf, start, count, finish);
-}
-
-void bdrv_dirty_bitmap_deserialize_zeroes(BdrvDirtyBitmap *bitmap,
-                                          uint64_t start, uint64_t count,
-                                          bool finish)
-{
-    hbitmap_deserialize_zeroes(bitmap->bitmap, start, count, finish);
-}
-
-void bdrv_dirty_bitmap_deserialize_finish(BdrvDirtyBitmap *bitmap)
-{
-    hbitmap_deserialize_finish(bitmap->bitmap);
-}
-
-void bdrv_set_dirty(BlockDriverState *bs, int64_t cur_sector,
-                    int64_t nr_sectors)
-{
-    BdrvDirtyBitmap *bitmap;
-    QLIST_FOREACH(bitmap, &bs->dirty_bitmaps, list) {
-        if (!bdrv_dirty_bitmap_enabled(bitmap)) {
-            continue;
-        }
-        hbitmap_set(bitmap->bitmap, cur_sector, nr_sectors);
-    }
-}
-
-/**
- * Advance a BdrvDirtyBitmapIter to an arbitrary offset.
- */
-void bdrv_set_dirty_iter(BdrvDirtyBitmapIter *iter, int64_t sector_num)
-{
-    hbitmap_iter_init(&iter->hbi, iter->hbi.hb, sector_num);
-}
-
-int64_t bdrv_get_dirty_count(BdrvDirtyBitmap *bitmap)
-{
-    return hbitmap_count(bitmap->bitmap);
-}
-
-int64_t bdrv_get_meta_dirty_count(BdrvDirtyBitmap *bitmap)
-{
-    return hbitmap_count(bitmap->meta);
-}
@@ -1,61 +0,0 @@
-/*
- * DMG bzip2 uncompression
- *
- * Copyright (c) 2004 Johannes E. Schindelin
- * Copyright (c) 2016 Red Hat, Inc.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-#include "qemu/osdep.h"
-#include "qemu-common.h"
-#include "dmg.h"
-#include <bzlib.h>
-
-static int dmg_uncompress_bz2_do(char *next_in, unsigned int avail_in,
-                                 char *next_out, unsigned int avail_out)
-{
-    int ret;
-    uint64_t total_out;
-    bz_stream bzstream = {};
-
-    ret = BZ2_bzDecompressInit(&bzstream, 0, 0);
-    if (ret != BZ_OK) {
-        return -1;
-    }
-    bzstream.next_in = next_in;
-    bzstream.avail_in = avail_in;
-    bzstream.next_out = next_out;
-    bzstream.avail_out = avail_out;
-    ret = BZ2_bzDecompress(&bzstream);
-    total_out = ((uint64_t)bzstream.total_out_hi32 << 32) +
-                bzstream.total_out_lo32;
-    BZ2_bzDecompressEnd(&bzstream);
-    if (ret != BZ_STREAM_END ||
-        total_out != avail_out) {
-        return -1;
-    }
-    return 0;
-}
-
-__attribute__((constructor))
-static void dmg_bz2_init(void)
-{
-    assert(!dmg_uncompress_bz2);
-    dmg_uncompress_bz2 = dmg_uncompress_bz2_do;
-}
@@ -21,17 +21,16 @@
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
-#include "qemu/osdep.h"
-#include "qapi/error.h"
 #include "qemu-common.h"
 #include "block/block_int.h"
 #include "qemu/bswap.h"
 #include "qemu/error-report.h"
 #include "qemu/module.h"
-#include "dmg.h"
-
-int (*dmg_uncompress_bz2)(char *next_in, unsigned int avail_in,
-                          char *next_out, unsigned int avail_out);
+#include <zlib.h>
+#ifdef CONFIG_BZIP2
+#include <bzlib.h>
+#endif
+#include <glib.h>

 enum {
    /* Limit chunk sizes to prevent unreasonable amounts of memory being used
@@ -41,6 +40,31 @@ enum {
    DMG_SECTORCOUNTS_MAX = DMG_LENGTHS_MAX / 512,
 };

+typedef struct BDRVDMGState {
+    CoMutex lock;
+    /* each chunk contains a certain number of sectors,
+     * offsets[i] is the offset in the .dmg file,
+     * lengths[i] is the length of the compressed chunk,
+     * sectors[i] is the sector beginning at offsets[i],
+     * sectorcounts[i] is the number of sectors in that chunk,
+     * the sectors array is ordered
+     * 0<=i<n_chunks */
+
+    uint32_t n_chunks;
+    uint32_t* types;
+    uint64_t* offsets;
+    uint64_t* lengths;
+    uint64_t* sectors;
+    uint64_t* sectorcounts;
+    uint32_t current_chunk;
+    uint8_t *compressed_chunk;
+    uint8_t *uncompressed_chunk;
+    z_stream zstream;
+#ifdef CONFIG_BZIP2
+    bz_stream bzstream;
+#endif
+} BDRVDMGState;
+
 static int dmg_probe(const uint8_t *buf, int buf_size, const char *filename)
 {
    int len;
@@ -128,9 +152,8 @@ static void update_max_chunk_size(BDRVDMGState *s, uint32_t chunk,
    }
 }

-static int64_t dmg_find_koly_offset(BdrvChild *file, Error **errp)
+static int64_t dmg_find_koly_offset(BlockDriverState *file_bs, Error **errp)
 {
-    BlockDriverState *file_bs = file->bs;
    int64_t length;
    int64_t offset = 0;
    uint8_t buffer[515];
@@ -154,7 +177,7 @@ static int64_t dmg_find_koly_offset(BdrvChild *file, Error **errp)
        offset = length - 511 - 512;
    }
    length = length < 515 ? length : 515;
-    ret = bdrv_pread(file, offset, buffer, length);
+    ret = bdrv_pread(file_bs, offset, buffer, length);
    if (ret < 0) {
        error_setg_errno(errp, -ret, "Failed while reading UDIF trailer");
        return ret;
@@ -185,9 +208,10 @@ static bool dmg_is_known_block_type(uint32_t entry_type)
    case 0x00000001:    /* uncompressed */
    case 0x00000002:    /* zeroes */
    case 0x80000005:    /* zlib */
-        return true;
+#ifdef CONFIG_BZIP2
    case 0x80000006:    /* bzip2 */
-        return !!dmg_uncompress_bz2;
+#endif
+        return true;
    default:
        return false;
    }
@@ -413,15 +437,7 @@ static int dmg_open(BlockDriverState *bs, QDict *options, int flags,
    int64_t offset;
    int ret;

-    bs->file = bdrv_open_child(NULL, options, "file", bs, &child_file,
-                               false, errp);
-    if (!bs->file) {
-        return -EINVAL;
-    }
-
-    block_module_load_one("dmg-bz2");
-    bs->read_only = true;
-
+    bs->read_only = 1;
    s->n_chunks = 0;
    s->offsets = s->lengths = s->sectors = s->sectorcounts = NULL;
    /* used by dmg_read_mish_block to keep track of the current I/O position */
@@ -498,9 +514,9 @@ static int dmg_open(BlockDriverState *bs, QDict *options, int flags,
    }

    /* initialize zlib engine */
-    s->compressed_chunk = qemu_try_blockalign(bs->file->bs,
+    s->compressed_chunk = qemu_try_blockalign(bs->file,
                                              ds.max_compressed_size + 1);
-    s->uncompressed_chunk = qemu_try_blockalign(bs->file->bs,
+    s->uncompressed_chunk = qemu_try_blockalign(bs->file,
                                                512 * ds.max_sectors_per_chunk);
    if (s->compressed_chunk == NULL || s->uncompressed_chunk == NULL) {
        ret = -ENOMEM;
@@ -528,11 +544,6 @@ fail:
    return ret;
 }

-static void dmg_refresh_limits(BlockDriverState *bs, Error **errp)
-{
-    bs->bl.request_alignment = BDRV_SECTOR_SIZE; /* No sub-sector I/O */
-}
-
 static inline int is_sector_in_chunk(BDRVDMGState* s,
                uint32_t chunk_num, uint64_t sector_num)
 {
@@ -568,6 +579,9 @@ static inline int dmg_read_chunk(BlockDriverState *bs, uint64_t sector_num)
    if (!is_sector_in_chunk(s, s->current_chunk, sector_num)) {
        int ret;
        uint32_t chunk = search_chunk(s, sector_num);
+#ifdef CONFIG_BZIP2
+        uint64_t total_out;
+#endif

        if (chunk >= s->n_chunks) {
            return -1;
@@ -598,10 +612,8 @@ static inline int dmg_read_chunk(BlockDriverState *bs, uint64_t sector_num)
                return -1;
            }
            break; }
+#ifdef CONFIG_BZIP2
        case 0x80000006: /* bzip2 compressed */
-            if (!dmg_uncompress_bz2) {
-                break;
-            }
            /* we need to buffer, because only the chunk as whole can be
             * inflated. */
            ret = bdrv_pread(bs->file, s->offsets[chunk],
@@ -610,15 +622,24 @@ static inline int dmg_read_chunk(BlockDriverState *bs, uint64_t sector_num)
                return -1;
            }

-            ret = dmg_uncompress_bz2((char *)s->compressed_chunk,
-                                     (unsigned int) s->lengths[chunk],
-                                     (char *)s->uncompressed_chunk,
-                                     (unsigned int)
-                                         (512 * s->sectorcounts[chunk]));
-            if (ret < 0) {
-                return ret;
+            ret = BZ2_bzDecompressInit(&s->bzstream, 0, 0);
+            if (ret != BZ_OK) {
+                return -1;
+            }
+            s->bzstream.next_in = (char *)s->compressed_chunk;
+            s->bzstream.avail_in = (unsigned int) s->lengths[chunk];
+            s->bzstream.next_out = (char *)s->uncompressed_chunk;
+            s->bzstream.avail_out = (unsigned int) 512 * s->sectorcounts[chunk];
+            ret = BZ2_bzDecompress(&s->bzstream);
+            total_out = ((uint64_t)s->bzstream.total_out_hi32 << 32) +
+                        s->bzstream.total_out_lo32;
+            BZ2_bzDecompressEnd(&s->bzstream);
+            if (ret != BZ_STREAM_END ||
+                total_out != 512 * s->sectorcounts[chunk]) {
+                return -1;
            }
            break;
+#endif /* CONFIG_BZIP2 */
        case 1: /* copy */
            ret = bdrv_pread(bs->file, s->offsets[chunk],
                             s->uncompressed_chunk, s->lengths[chunk]);
@@ -636,42 +657,38 @@ static inline int dmg_read_chunk(BlockDriverState *bs, uint64_t sector_num)
    return 0;
 }

-static int coroutine_fn
-dmg_co_preadv(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
-              QEMUIOVector *qiov, int flags)
+static int dmg_read(BlockDriverState *bs, int64_t sector_num,
+                    uint8_t *buf, int nb_sectors)
 {
    BDRVDMGState *s = bs->opaque;
-    uint64_t sector_num = offset >> BDRV_SECTOR_BITS;
-    int nb_sectors = bytes >> BDRV_SECTOR_BITS;
-    int ret, i;
-
-    assert((offset & (BDRV_SECTOR_SIZE - 1)) == 0);
-    assert((bytes & (BDRV_SECTOR_SIZE - 1)) == 0);
-
-    qemu_co_mutex_lock(&s->lock);
+    int i;

    for (i = 0; i < nb_sectors; i++) {
        uint32_t sector_offset_in_chunk;
-        void *data;
-
        if (dmg_read_chunk(bs, sector_num + i) != 0) {
-            ret = -EIO;
-            goto fail;
+            return -1;
        }
        /* Special case: current chunk is all zeroes. Do not perform a memcpy as
         * s->uncompressed_chunk may be too small to cover the large all-zeroes
         * section. dmg_read_chunk is called to find s->current_chunk */
        if (s->types[s->current_chunk] == 2) { /* all zeroes block entry */
-            qemu_iovec_memset(qiov, i * 512, 0, 512);
+            memset(buf + i * 512, 0, 512);
            continue;
        }
        sector_offset_in_chunk = sector_num + i - s->sectors[s->current_chunk];
-        data = s->uncompressed_chunk + sector_offset_in_chunk * 512;
-        qemu_iovec_from_buf(qiov, i * 512, data, 512);
+        memcpy(buf + i * 512,
+               s->uncompressed_chunk + sector_offset_in_chunk * 512, 512);
    }
+    return 0;
+}

-    ret = 0;
-fail:
+static coroutine_fn int dmg_co_read(BlockDriverState *bs, int64_t sector_num,
+                                    uint8_t *buf, int nb_sectors)
+{
+    int ret;
+    BDRVDMGState *s = bs->opaque;
+    qemu_co_mutex_lock(&s->lock);
+    ret = dmg_read(bs, sector_num, buf, nb_sectors);
    qemu_co_mutex_unlock(&s->lock);
    return ret;
 }
@@ -696,9 +713,7 @@ static BlockDriver bdrv_dmg = {
    .instance_size  = sizeof(BDRVDMGState),
    .bdrv_probe     = dmg_probe,
    .bdrv_open      = dmg_open,
-    .bdrv_refresh_limits = dmg_refresh_limits,
-    .bdrv_child_perm     = bdrv_format_default_perms,
-    .bdrv_co_preadv = dmg_co_preadv,
+    .bdrv_read      = dmg_co_read,
    .bdrv_close     = dmg_close,
 };

@@ -1,59 +0,0 @@
-/*
- * Header for DMG driver
- *
- * Copyright (c) 2004-2006 Fabrice Bellard
- * Copyright (c) 2016 Red hat, Inc.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-
-#ifndef BLOCK_DMG_H
-#define BLOCK_DMG_H
-
-#include "qemu/osdep.h"
-#include "qemu-common.h"
-#include "block/block_int.h"
-#include <zlib.h>
-
-typedef struct BDRVDMGState {
-    CoMutex lock;
-    /* each chunk contains a certain number of sectors,
-     * offsets[i] is the offset in the .dmg file,
-     * lengths[i] is the length of the compressed chunk,
-     * sectors[i] is the sector beginning at offsets[i],
-     * sectorcounts[i] is the number of sectors in that chunk,
-     * the sectors array is ordered
-     * 0<=i<n_chunks */
-
-    uint32_t n_chunks;
-    uint32_t *types;
-    uint64_t *offsets;
-    uint64_t *lengths;
-    uint64_t *sectors;
-    uint64_t *sectorcounts;
-    uint32_t current_chunk;
-    uint8_t *compressed_chunk;
-    uint8_t *uncompressed_chunk;
-    z_stream zstream;
-} BDRVDMGState;
-
-extern int (*dmg_uncompress_bz2)(char *next_in, unsigned int avail_in,
-                                 char *next_out, unsigned int avail_out);
-
-#endif
@@ -1,69 +0,0 @@
-/*
- * QEMU Block driver for iSCSI images (static options)
- *
- * Copyright (c) 2017 Peter Lieven <pl@kamp.de>
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-
-#include "qemu/osdep.h"
-#include "qemu-common.h"
-#include "qemu/config-file.h"
-
-static QemuOptsList qemu_iscsi_opts = {
-    .name = "iscsi",
-    .head = QTAILQ_HEAD_INITIALIZER(qemu_iscsi_opts.head),
-    .desc = {
-        {
-            .name = "user",
-            .type = QEMU_OPT_STRING,
-            .help = "username for CHAP authentication to target",
-        },{
-            .name = "password",
-            .type = QEMU_OPT_STRING,
-            .help = "password for CHAP authentication to target",
-        },{
-            .name = "password-secret",
-            .type = QEMU_OPT_STRING,
-            .help = "ID of the secret providing password for CHAP "
-                    "authentication to target",
-        },{
-            .name = "header-digest",
-            .type = QEMU_OPT_STRING,
-            .help = "HeaderDigest setting. "
-                    "{CRC32C|CRC32C-NONE|NONE-CRC32C|NONE}",
-        },{
-            .name = "initiator-name",
-            .type = QEMU_OPT_STRING,
-            .help = "Initiator iqn name to use when connecting",
-        },{
-            .name = "timeout",
-            .type = QEMU_OPT_NUMBER,
-            .help = "Request timeout in seconds (default 0 = no timeout)",
-        },
-        { /* end of list */ }
-    },
-};
-
-static void iscsi_block_opts_init(void)
-{
-    qemu_add_opts(&qemu_iscsi_opts);
-}
-
-block_init(iscsi_block_opts_init);
@@ -7,14 +7,11 @@
 * This work is licensed under the terms of the GNU GPL, version 2 or later.
 * See the COPYING file in the top-level directory.
 */
-#include "qemu/osdep.h"
 #include "qemu-common.h"
 #include "block/aio.h"
 #include "qemu/queue.h"
-#include "block/block.h"
 #include "block/raw-aio.h"
 #include "qemu/event_notifier.h"
-#include "qemu/coroutine.h"

 #include <libaio.h>

@@ -28,10 +25,11 @@
 */
 #define MAX_EVENTS 128

+#define MAX_QUEUED_IO  128
+
 struct qemu_laiocb {
    BlockAIOCB common;
-    Coroutine *co;
-    LinuxAioState *ctx;
+    struct qemu_laio_state *ctx;
    struct iocb iocb;
    ssize_t ret;
    size_t nbytes;
@@ -42,28 +40,26 @@ struct qemu_laiocb {

 typedef struct {
    int plugged;
-    unsigned int in_queue;
-    unsigned int in_flight;
+    unsigned int n;
    bool blocked;
    QSIMPLEQ_HEAD(, qemu_laiocb) pending;
 } LaioQueue;

-struct LinuxAioState {
-    AioContext *aio_context;
-
+struct qemu_laio_state {
    io_context_t ctx;
    EventNotifier e;

-    /* io queue for submit at batch.  Protected by AioContext lock. */
+    /* io queue for submit at batch */
    LaioQueue io_q;

-    /* I/O completion processing.  Only runs in I/O thread.  */
+    /* I/O completion processing */
    QEMUBH *completion_bh;
+    struct io_event events[MAX_EVENTS];
    int event_idx;
    int event_max;
 };

-static void ioq_submit(LinuxAioState *s);
+static void ioq_submit(struct qemu_laio_state *s);

 static inline ssize_t io_event_ret(struct io_event *ev)
 {
@@ -73,7 +69,8 @@ static inline ssize_t io_event_ret(struct io_event *ev)
 /*
 * Completes an AIO request (calls the callback and frees the ACB).
 */
-static void qemu_laio_process_completion(struct qemu_laiocb *laiocb)
+static void qemu_laio_process_completion(struct qemu_laio_state *s,
+    struct qemu_laiocb *laiocb)
 {
    int ret;

@@ -87,191 +84,74 @@ static void qemu_laio_process_completion(struct qemu_laiocb *laiocb)
                qemu_iovec_memset(laiocb->qiov, ret, 0,
                    laiocb->qiov->size - ret);
            } else {
-                ret = -ENOSPC;
+                ret = -EINVAL;
            }
        }
    }
+    laiocb->common.cb(laiocb->common.opaque, ret);

-    laiocb->ret = ret;
-    if (laiocb->co) {
-        /* If the coroutine is already entered it must be in ioq_submit() and
-         * will notice laio->ret has been filled in when it eventually runs
-         * later.  Coroutines cannot be entered recursively so avoid doing
-         * that!
-         */
-        if (!qemu_coroutine_entered(laiocb->co)) {
-            aio_co_wake(laiocb->co);
-        }
-    } else {
-        laiocb->common.cb(laiocb->common.opaque, ret);
-        qemu_aio_unref(laiocb);
-    }
+    qemu_aio_unref(laiocb);
 }

-/**
- * aio_ring buffer which is shared between userspace and kernel.
- *
- * This copied from linux/fs/aio.c, common header does not exist
- * but AIO exists for ages so we assume ABI is stable.
- */
-struct aio_ring {
-    unsigned    id;    /* kernel internal index number */
-    unsigned    nr;    /* number of io_events */
-    unsigned    head;  /* Written to by userland or by kernel. */
-    unsigned    tail;
-
-    unsigned    magic;
-    unsigned    compat_features;
-    unsigned    incompat_features;
-    unsigned    header_length;  /* size of aio_ring */
-
-    struct io_event io_events[0];
-};
-
-/**
- * io_getevents_peek:
- * @ctx: AIO context
- * @events: pointer on events array, output value
-
- * Returns the number of completed events and sets a pointer
- * on events array.  This function does not update the internal
- * ring buffer, only reads head and tail.  When @events has been
- * processed io_getevents_commit() must be called.
- */
-static inline unsigned int io_getevents_peek(io_context_t ctx,
-                                             struct io_event **events)
-{
-    struct aio_ring *ring = (struct aio_ring *)ctx;
-    unsigned int head = ring->head, tail = ring->tail;
-    unsigned int nr;
-
-    nr = tail >= head ? tail - head : ring->nr - head;
-    *events = ring->io_events + head;
-    /* To avoid speculative loads of s->events[i] before observing tail.
-       Paired with smp_wmb() inside linux/fs/aio.c: aio_complete(). */
-    smp_rmb();
-
-    return nr;
-}
-
-/**
- * io_getevents_commit:
- * @ctx: AIO context
- * @nr: the number of events on which head should be advanced
- *
- * Advances head of a ring buffer.
- */
-static inline void io_getevents_commit(io_context_t ctx, unsigned int nr)
-{
-    struct aio_ring *ring = (struct aio_ring *)ctx;
-
-    if (nr) {
-        ring->head = (ring->head + nr) % ring->nr;
-    }
-}
-
-/**
- * io_getevents_advance_and_peek:
- * @ctx: AIO context
- * @events: pointer on events array, output value
- * @nr: the number of events on which head should be advanced
- *
- * Advances head of a ring buffer and returns number of elements left.
- */
-static inline unsigned int
-io_getevents_advance_and_peek(io_context_t ctx,
-                              struct io_event **events,
-                              unsigned int nr)
-{
-    io_getevents_commit(ctx, nr);
-    return io_getevents_peek(ctx, events);
-}
-
-/**
- * qemu_laio_process_completions:
- * @s: AIO state
- *
- * Fetches completed I/O requests and invokes their callbacks.
+/* The completion BH fetches completed I/O requests and invokes their
+ * callbacks.
 *
 * The function is somewhat tricky because it supports nested event loops, for
 * example when a request callback invokes aio_poll().  In order to do this,
- * indices are kept in LinuxAioState.  Function schedules BH completion so it
- * can be called again in a nested event loop.  When there are no events left
- * to complete the BH is being canceled.
+ * the completion events array and index are kept in qemu_laio_state.  The BH
+ * reschedules itself as long as there are completions pending so it will
+ * either be called again in a nested event loop or will be called after all
+ * events have been completed.  When there are no events left to complete, the
+ * BH returns without rescheduling.
 */
-static void qemu_laio_process_completions(LinuxAioState *s)
+static void qemu_laio_completion_bh(void *opaque)
 {
-    struct io_event *events;
+    struct qemu_laio_state *s = opaque;
+
+    /* Fetch more completion events when empty */
+    if (s->event_idx == s->event_max) {
+        do {
+            struct timespec ts = { 0 };
+            s->event_max = io_getevents(s->ctx, MAX_EVENTS, MAX_EVENTS,
+                                        s->events, &ts);
+        } while (s->event_max == -EINTR);
+
+        s->event_idx = 0;
+        if (s->event_max <= 0) {
+            s->event_max = 0;
+            return; /* no more events */
+        }
+    }

    /* Reschedule so nested event loops see currently pending completions */
    qemu_bh_schedule(s->completion_bh);

-    while ((s->event_max = io_getevents_advance_and_peek(s->ctx, &events,
-                                                         s->event_idx))) {
-        for (s->event_idx = 0; s->event_idx < s->event_max; ) {
-            struct iocb *iocb = events[s->event_idx].obj;
-            struct qemu_laiocb *laiocb =
+    /* Process completion events */
+    while (s->event_idx < s->event_max) {
+        struct iocb *iocb = s->events[s->event_idx].obj;
+        struct qemu_laiocb *laiocb =
                container_of(iocb, struct qemu_laiocb, iocb);

-            laiocb->ret = io_event_ret(&events[s->event_idx]);
+        laiocb->ret = io_event_ret(&s->events[s->event_idx]);
+        s->event_idx++;

-            /* Change counters one-by-one because we can be nested. */
-            s->io_q.in_flight--;
-            s->event_idx++;
-            qemu_laio_process_completion(laiocb);
-        }
+        qemu_laio_process_completion(s, laiocb);
    }

-    qemu_bh_cancel(s->completion_bh);
-
-    /* If we are nested we have to notify the level above that we are done
-     * by setting event_max to zero, upper level will then jump out of it's
-     * own `for` loop.  If we are the last all counters droped to zero. */
-    s->event_max = 0;
-    s->event_idx = 0;
-}
-
-static void qemu_laio_process_completions_and_submit(LinuxAioState *s)
-{
-    qemu_laio_process_completions(s);
-
-    aio_context_acquire(s->aio_context);
    if (!s->io_q.plugged && !QSIMPLEQ_EMPTY(&s->io_q.pending)) {
        ioq_submit(s);
    }
-    aio_context_release(s->aio_context);
-}
-
-static void qemu_laio_completion_bh(void *opaque)
-{
-    LinuxAioState *s = opaque;
-
-    qemu_laio_process_completions_and_submit(s);
 }

 static void qemu_laio_completion_cb(EventNotifier *e)
 {
-    LinuxAioState *s = container_of(e, LinuxAioState, e);
+    struct qemu_laio_state *s = container_of(e, struct qemu_laio_state, e);

    if (event_notifier_test_and_clear(&s->e)) {
-        qemu_laio_process_completions_and_submit(s);
+        qemu_bh_schedule(s->completion_bh);
    }
 }

-static bool qemu_laio_poll_cb(void *opaque)
-{
-    EventNotifier *e = opaque;
-    LinuxAioState *s = container_of(e, LinuxAioState, e);
-    struct io_event *events;
-
-    if (!io_getevents_peek(s->ctx, &events)) {
-        return false;
-    }
-
-    qemu_laio_process_completions_and_submit(s);
-    return true;
-}
-
 static void laio_cancel(BlockAIOCB *blockacb)
 {
    struct qemu_laiocb *laiocb = (struct qemu_laiocb *)blockacb;
@@ -300,26 +180,22 @@ static void ioq_init(LaioQueue *io_q)
 {
    QSIMPLEQ_INIT(&io_q->pending);
    io_q->plugged = 0;
-    io_q->in_queue = 0;
-    io_q->in_flight = 0;
+    io_q->n = 0;
    io_q->blocked = false;
 }

-static void ioq_submit(LinuxAioState *s)
+static void ioq_submit(struct qemu_laio_state *s)
 {
    int ret, len;
    struct qemu_laiocb *aiocb;
-    struct iocb *iocbs[MAX_EVENTS];
+    struct iocb *iocbs[MAX_QUEUED_IO];
    QSIMPLEQ_HEAD(, qemu_laiocb) completed;

    do {
-        if (s->io_q.in_flight >= MAX_EVENTS) {
-            break;
-        }
        len = 0;
        QSIMPLEQ_FOREACH(aiocb, &s->io_q.pending, next) {
            iocbs[len++] = &aiocb->iocb;
-            if (s->io_q.in_flight + len >= MAX_EVENTS) {
+            if (len == MAX_QUEUED_IO) {
                break;
            }
        }
@@ -329,56 +205,55 @@ static void ioq_submit(LinuxAioState *s)
            break;
        }
        if (ret < 0) {
-            /* Fail the first request, retry the rest */
-            aiocb = QSIMPLEQ_FIRST(&s->io_q.pending);
-            QSIMPLEQ_REMOVE_HEAD(&s->io_q.pending, next);
-            s->io_q.in_queue--;
-            aiocb->ret = ret;
-            qemu_laio_process_completion(aiocb);
-            continue;
+            abort();
        }

-        s->io_q.in_flight += ret;
-        s->io_q.in_queue  -= ret;
+        s->io_q.n -= ret;
        aiocb = container_of(iocbs[ret - 1], struct qemu_laiocb, iocb);
        QSIMPLEQ_SPLIT_AFTER(&s->io_q.pending, aiocb, next, &completed);
    } while (ret == len && !QSIMPLEQ_EMPTY(&s->io_q.pending));
-    s->io_q.blocked = (s->io_q.in_queue > 0);
-
-    if (s->io_q.in_flight) {
-        /* We can try to complete something just right away if there are
-         * still requests in-flight. */
-        qemu_laio_process_completions(s);
-        /*
-         * Even we have completed everything (in_flight == 0), the queue can
-         * have still pended requests (in_queue > 0).  We do not attempt to
-         * repeat submission to avoid IO hang.  The reason is simple: s->e is
-         * still set and completion callback will be called shortly and all
-         * pended requests will be submitted from there.
-         */
-    }
+    s->io_q.blocked = (s->io_q.n > 0);
 }

-void laio_io_plug(BlockDriverState *bs, LinuxAioState *s)
+void laio_io_plug(BlockDriverState *bs, void *aio_ctx)
 {
+    struct qemu_laio_state *s = aio_ctx;
+
    s->io_q.plugged++;
 }

-void laio_io_unplug(BlockDriverState *bs, LinuxAioState *s)
+void laio_io_unplug(BlockDriverState *bs, void *aio_ctx, bool unplug)
 {
-    assert(s->io_q.plugged);
-    if (--s->io_q.plugged == 0 &&
-        !s->io_q.blocked && !QSIMPLEQ_EMPTY(&s->io_q.pending)) {
+    struct qemu_laio_state *s = aio_ctx;
+
+    assert(s->io_q.plugged > 0 || !unplug);
+
+    if (unplug && --s->io_q.plugged > 0) {
+        return;
+    }
+
+    if (!s->io_q.blocked && !QSIMPLEQ_EMPTY(&s->io_q.pending)) {
        ioq_submit(s);
    }
 }

-static int laio_do_submit(int fd, struct qemu_laiocb *laiocb, off_t offset,
-                          int type)
+BlockAIOCB *laio_submit(BlockDriverState *bs, void *aio_ctx, int fd,
+        int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
+        BlockCompletionFunc *cb, void *opaque, int type)
 {
-    LinuxAioState *s = laiocb->ctx;
-    struct iocb *iocbs = &laiocb->iocb;
-    QEMUIOVector *qiov = laiocb->qiov;
+    struct qemu_laio_state *s = aio_ctx;
+    struct qemu_laiocb *laiocb;
+    struct iocb *iocbs;
+    off_t offset = sector_num * 512;
+
+    laiocb = qemu_aio_get(&laio_aiocb_info, bs, cb, opaque);
+    laiocb->nbytes = nb_sectors * 512;
+    laiocb->ctx = s;
+    laiocb->ret = -EINPROGRESS;
+    laiocb->is_read = (type == QEMU_AIO_READ);
+    laiocb->qiov = qiov;
+
+    iocbs = &laiocb->iocb;

    switch (type) {
    case QEMU_AIO_WRITE:
@@ -391,88 +266,42 @@ static int laio_do_submit(int fd, struct qemu_laiocb *laiocb, off_t offset,
    default:
        fprintf(stderr, "%s: invalid AIO request type 0x%x.\n",
                        __func__, type);
-        return -EIO;
+        goto out_free_aiocb;
    }
    io_set_eventfd(&laiocb->iocb, event_notifier_get_fd(&s->e));

    QSIMPLEQ_INSERT_TAIL(&s->io_q.pending, laiocb, next);
-    s->io_q.in_queue++;
+    s->io_q.n++;
    if (!s->io_q.blocked &&
-        (!s->io_q.plugged ||
-         s->io_q.in_flight + s->io_q.in_queue >= MAX_EVENTS)) {
+        (!s->io_q.plugged || s->io_q.n >= MAX_QUEUED_IO)) {
        ioq_submit(s);
    }
-
-    return 0;
-}
-
-int coroutine_fn laio_co_submit(BlockDriverState *bs, LinuxAioState *s, int fd,
-                                uint64_t offset, QEMUIOVector *qiov, int type)
-{
-    int ret;
-    struct qemu_laiocb laiocb = {
-        .co         = qemu_coroutine_self(),
-        .nbytes     = qiov->size,
-        .ctx        = s,
-        .ret        = -EINPROGRESS,
-        .is_read    = (type == QEMU_AIO_READ),
-        .qiov       = qiov,
-    };
-
-    ret = laio_do_submit(fd, &laiocb, offset, type);
-    if (ret < 0) {
-        return ret;
-    }
-
-    if (laiocb.ret == -EINPROGRESS) {
-        qemu_coroutine_yield();
-    }
-    return laiocb.ret;
-}
-
-BlockAIOCB *laio_submit(BlockDriverState *bs, LinuxAioState *s, int fd,
-        int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
-        BlockCompletionFunc *cb, void *opaque, int type)
-{
-    struct qemu_laiocb *laiocb;
-    off_t offset = sector_num * BDRV_SECTOR_SIZE;
-    int ret;
-
-    laiocb = qemu_aio_get(&laio_aiocb_info, bs, cb, opaque);
-    laiocb->nbytes = nb_sectors * BDRV_SECTOR_SIZE;
-    laiocb->ctx = s;
-    laiocb->ret = -EINPROGRESS;
-    laiocb->is_read = (type == QEMU_AIO_READ);
-    laiocb->qiov = qiov;
-
-    ret = laio_do_submit(fd, laiocb, offset, type);
-    if (ret < 0) {
-        qemu_aio_unref(laiocb);
-        return NULL;
-    }
-
    return &laiocb->common;
+
+out_free_aiocb:
+    qemu_aio_unref(laiocb);
+    return NULL;
 }

-void laio_detach_aio_context(LinuxAioState *s, AioContext *old_context)
+void laio_detach_aio_context(void *s_, AioContext *old_context)
 {
-    aio_set_event_notifier(old_context, &s->e, false, NULL, NULL);
+    struct qemu_laio_state *s = s_;
+
+    aio_set_event_notifier(old_context, &s->e, NULL);
    qemu_bh_delete(s->completion_bh);
-    s->aio_context = NULL;
 }

-void laio_attach_aio_context(LinuxAioState *s, AioContext *new_context)
+void laio_attach_aio_context(void *s_, AioContext *new_context)
 {
-    s->aio_context = new_context;
+    struct qemu_laio_state *s = s_;
+
    s->completion_bh = aio_bh_new(new_context, qemu_laio_completion_bh, s);
-    aio_set_event_notifier(new_context, &s->e, false,
-                           qemu_laio_completion_cb,
-                           qemu_laio_poll_cb);
+    aio_set_event_notifier(new_context, &s->e, qemu_laio_completion_cb);
 }

-LinuxAioState *laio_init(void)
+void *laio_init(void)
 {
-    LinuxAioState *s;
+    struct qemu_laio_state *s;

    s = g_malloc0(sizeof(*s));
    if (event_notifier_init(&s->e, false) < 0) {
@@ -494,8 +323,10 @@ out_free_state:
    return NULL;
 }

-void laio_cleanup(LinuxAioState *s)
+void laio_cleanup(void *s_)
 {
+    struct qemu_laio_state *s = s_;
+
    event_notifier_cleanup(&s->e);

    if (io_destroy(s->ctx) != 0) {
@@ -1,7 +1,6 @@
 /*
 * QEMU Block driver for  NBD
 *
- * Copyright (C) 2016 Red Hat, Inc.
 * Copyright (C) 2008 Bull S.A.S.
 *     Author: Laurent Vivier <Laurent.Vivier@bull.net>
 *
@@ -27,90 +26,88 @@
 * THE SOFTWARE.
 */

-#include "qemu/osdep.h"
 #include "nbd-client.h"
+#include "qemu/sockets.h"

 #define HANDLE_TO_INDEX(bs, handle) ((handle) ^ ((uint64_t)(intptr_t)bs))
 #define INDEX_TO_HANDLE(bs, index)  ((index)  ^ ((uint64_t)(intptr_t)bs))

-static void nbd_recv_coroutines_enter_all(NBDClientSession *s)
+static void nbd_recv_coroutines_enter_all(NbdClientSession *s)
 {
    int i;

    for (i = 0; i < MAX_NBD_REQUESTS; i++) {
        if (s->recv_coroutine[i]) {
-            aio_co_wake(s->recv_coroutine[i]);
+            qemu_coroutine_enter(s->recv_coroutine[i], NULL);
        }
    }
 }

 static void nbd_teardown_connection(BlockDriverState *bs)
 {
-    NBDClientSession *client = nbd_get_client_session(bs);
-
-    if (!client->ioc) { /* Already closed */
-        return;
-    }
+    NbdClientSession *client = nbd_get_client_session(bs);

    /* finish any pending coroutines */
-    qio_channel_shutdown(client->ioc,
-                         QIO_CHANNEL_SHUTDOWN_BOTH,
-                         NULL);
-    BDRV_POLL_WHILE(bs, client->read_reply_co);
+    shutdown(client->sock, 2);
+    nbd_recv_coroutines_enter_all(client);

    nbd_client_detach_aio_context(bs);
-    object_unref(OBJECT(client->sioc));
-    client->sioc = NULL;
-    object_unref(OBJECT(client->ioc));
-    client->ioc = NULL;
+    closesocket(client->sock);
+    client->sock = -1;
 }

-static coroutine_fn void nbd_read_reply_entry(void *opaque)
+static void nbd_reply_ready(void *opaque)
 {
-    NBDClientSession *s = opaque;
+    BlockDriverState *bs = opaque;
+    NbdClientSession *s = nbd_get_client_session(bs);
    uint64_t i;
    int ret;

-    for (;;) {
-        assert(s->reply.handle == 0);
-        ret = nbd_receive_reply(s->ioc, &s->reply);
-        if (ret <= 0) {
-            break;
-        }
-
-        /* There's no need for a mutex on the receive side, because the
-         * handler acts as a synchronization point and ensures that only
-         * one coroutine is called until the reply finishes.
+    if (s->reply.handle == 0) {
+        /* No reply already in flight.  Fetch a header.  It is possible
+         * that another thread has done the same thing in parallel, so
+         * the socket is not readable anymore.
         */
-        i = HANDLE_TO_INDEX(s, s->reply.handle);
-        if (i >= MAX_NBD_REQUESTS || !s->recv_coroutine[i]) {
-            break;
+        ret = nbd_receive_reply(s->sock, &s->reply);
+        if (ret == -EAGAIN) {
+            return;
+        }
+        if (ret < 0) {
+            s->reply.handle = 0;
+            goto fail;
        }
-
-        /* We're woken up by the recv_coroutine itself.  Note that there
-         * is no race between yielding and reentering read_reply_co.  This
-         * is because:
-         *
-         * - if recv_coroutine[i] runs on the same AioContext, it is only
-         *   entered after we yield
-         *
-         * - if recv_coroutine[i] runs on a different AioContext, reentering
-         *   read_reply_co happens through a bottom half, which can only
-         *   run after we yield.
-         */
-        aio_co_wake(s->recv_coroutine[i]);
-        qemu_coroutine_yield();
    }

-    nbd_recv_coroutines_enter_all(s);
-    s->read_reply_co = NULL;
+    /* There's no need for a mutex on the receive side, because the
+     * handler acts as a synchronization point and ensures that only
+     * one coroutine is called until the reply finishes.  */
+    i = HANDLE_TO_INDEX(s, s->reply.handle);
+    if (i >= MAX_NBD_REQUESTS) {
+        goto fail;
+    }
+
+    if (s->recv_coroutine[i]) {
+        qemu_coroutine_enter(s->recv_coroutine[i], NULL);
+        return;
+    }
+
+fail:
+    nbd_teardown_connection(bs);
+}
+
+static void nbd_restart_write(void *opaque)
+{
+    BlockDriverState *bs = opaque;
+
+    qemu_coroutine_enter(nbd_get_client_session(bs)->send_coroutine, NULL);
 }

 static int nbd_co_send_request(BlockDriverState *bs,
-                               NBDRequest *request,
-                               QEMUIOVector *qiov)
+                               struct nbd_request *request,
+                               QEMUIOVector *qiov, int offset)
 {
-    NBDClientSession *s = nbd_get_client_session(bs);
+    NbdClientSession *s = nbd_get_client_session(bs);
+    AioContext *aio_context;
    int rc, ret, i;

    qemu_co_mutex_lock(&s->send_mutex);
@@ -122,50 +119,53 @@ static int nbd_co_send_request(BlockDriverState *bs,
        }
    }

-    g_assert(qemu_in_coroutine());
    assert(i < MAX_NBD_REQUESTS);
    request->handle = INDEX_TO_HANDLE(s, i);
+    s->send_coroutine = qemu_coroutine_self();
+    aio_context = bdrv_get_aio_context(bs);

-    if (!s->ioc) {
-        qemu_co_mutex_unlock(&s->send_mutex);
-        return -EPIPE;
-    }
-
+    aio_set_fd_handler(aio_context, s->sock,
+                       nbd_reply_ready, nbd_restart_write, bs);
    if (qiov) {
-        qio_channel_set_cork(s->ioc, true);
-        rc = nbd_send_request(s->ioc, request);
+        if (!s->is_unix) {
+            socket_set_cork(s->sock, 1);
+        }
+        rc = nbd_send_request(s->sock, request);
        if (rc >= 0) {
-            ret = nbd_wr_syncv(s->ioc, qiov->iov, qiov->niov, request->len,
-                               false);
+            ret = qemu_co_sendv(s->sock, qiov->iov, qiov->niov,
+                                offset, request->len);
            if (ret != request->len) {
                rc = -EIO;
            }
        }
-        qio_channel_set_cork(s->ioc, false);
+        if (!s->is_unix) {
+            socket_set_cork(s->sock, 0);
+        }
    } else {
-        rc = nbd_send_request(s->ioc, request);
+        rc = nbd_send_request(s->sock, request);
    }
+    aio_set_fd_handler(aio_context, s->sock, nbd_reply_ready, NULL, bs);
+    s->send_coroutine = NULL;
    qemu_co_mutex_unlock(&s->send_mutex);
    return rc;
 }

-static void nbd_co_receive_reply(NBDClientSession *s,
-                                 NBDRequest *request,
-                                 NBDReply *reply,
-                                 QEMUIOVector *qiov)
+static void nbd_co_receive_reply(NbdClientSession *s,
+    struct nbd_request *request, struct nbd_reply *reply,
+    QEMUIOVector *qiov, int offset)
 {
    int ret;

-    /* Wait until we're woken up by nbd_read_reply_entry.  */
+    /* Wait until we're woken up by the read handler.  TODO: perhaps
+     * peek at the next reply and avoid yielding if it's ours?  */
    qemu_coroutine_yield();
    *reply = s->reply;
-    if (reply->handle != request->handle ||
-        !s->ioc) {
+    if (reply->handle != request->handle) {
        reply->error = EIO;
    } else {
        if (qiov && reply->error == 0) {
-            ret = nbd_wr_syncv(s->ioc, qiov->iov, qiov->niov, request->len,
-                               true);
+            ret = qemu_co_recvv(s->sock, qiov->iov, qiov->niov,
+                                offset, request->len);
            if (ret != request->len) {
                reply->error = EIO;
            }
@@ -176,13 +176,13 @@ static void nbd_co_receive_reply(NBDClientSession *s,
    }
 }

-static void nbd_coroutine_start(NBDClientSession *s,
-                                NBDRequest *request)
+static void nbd_coroutine_start(NbdClientSession *s,
+   struct nbd_request *request)
 {
    /* Poor man semaphore.  The free_sema is locked when no other request
     * can be accepted, and unlocked after receiving one reply.  */
-    if (s->in_flight == MAX_NBD_REQUESTS) {
-        qemu_co_queue_wait(&s->free_sema, NULL);
+    if (s->in_flight >= MAX_NBD_REQUESTS - 1) {
+        qemu_co_mutex_lock(&s->free_sema);
        assert(s->in_flight < MAX_NBD_REQUESTS);
    }
    s->in_flight++;
@@ -190,238 +190,216 @@ static void nbd_coroutine_start(NBDClientSession *s,
    /* s->recv_coroutine[i] is set as soon as we get the send_lock.  */
 }

-static void nbd_coroutine_end(BlockDriverState *bs,
-                              NBDRequest *request)
+static void nbd_coroutine_end(NbdClientSession *s,
+    struct nbd_request *request)
 {
-    NBDClientSession *s = nbd_get_client_session(bs);
    int i = HANDLE_TO_INDEX(s, request->handle);
-
    s->recv_coroutine[i] = NULL;
-    s->in_flight--;
-    qemu_co_queue_next(&s->free_sema);
-
-    /* Kick the read_reply_co to get the next reply.  */
-    if (s->read_reply_co) {
-        aio_co_wake(s->read_reply_co);
+    if (s->in_flight-- == MAX_NBD_REQUESTS) {
+        qemu_co_mutex_unlock(&s->free_sema);
    }
 }

-int nbd_client_co_preadv(BlockDriverState *bs, uint64_t offset,
-                         uint64_t bytes, QEMUIOVector *qiov, int flags)
+static int nbd_co_readv_1(BlockDriverState *bs, int64_t sector_num,
+                          int nb_sectors, QEMUIOVector *qiov,
+                          int offset)
 {
-    NBDClientSession *client = nbd_get_client_session(bs);
-    NBDRequest request = {
-        .type = NBD_CMD_READ,
-        .from = offset,
-        .len = bytes,
-    };
-    NBDReply reply;
+    NbdClientSession *client = nbd_get_client_session(bs);
+    struct nbd_request request = { .type = NBD_CMD_READ };
+    struct nbd_reply reply;
    ssize_t ret;

-    assert(bytes <= NBD_MAX_BUFFER_SIZE);
-    assert(!flags);
+    request.from = sector_num * 512;
+    request.len = nb_sectors * 512;

    nbd_coroutine_start(client, &request);
-    ret = nbd_co_send_request(bs, &request, NULL);
+    ret = nbd_co_send_request(bs, &request, NULL, 0);
    if (ret < 0) {
        reply.error = -ret;
    } else {
-        nbd_co_receive_reply(client, &request, &reply, qiov);
+        nbd_co_receive_reply(client, &request, &reply, qiov, offset);
    }
-    nbd_coroutine_end(bs, &request);
+    nbd_coroutine_end(client, &request);
+    return -reply.error;
+
+}
+
+static int nbd_co_writev_1(BlockDriverState *bs, int64_t sector_num,
+                           int nb_sectors, QEMUIOVector *qiov,
+                           int offset)
+{
+    NbdClientSession *client = nbd_get_client_session(bs);
+    struct nbd_request request = { .type = NBD_CMD_WRITE };
+    struct nbd_reply reply;
+    ssize_t ret;
+
+    if (!bdrv_enable_write_cache(bs) &&
+        (client->nbdflags & NBD_FLAG_SEND_FUA)) {
+        request.type |= NBD_CMD_FLAG_FUA;
+    }
+
+    request.from = sector_num * 512;
+    request.len = nb_sectors * 512;
+
+    nbd_coroutine_start(client, &request);
+    ret = nbd_co_send_request(bs, &request, qiov, offset);
+    if (ret < 0) {
+        reply.error = -ret;
+    } else {
+        nbd_co_receive_reply(client, &request, &reply, NULL, 0);
+    }
+    nbd_coroutine_end(client, &request);
    return -reply.error;
 }

-int nbd_client_co_pwritev(BlockDriverState *bs, uint64_t offset,
-                          uint64_t bytes, QEMUIOVector *qiov, int flags)
+/* qemu-nbd has a limit of slightly less than 1M per request.  Try to
+ * remain aligned to 4K. */
+#define NBD_MAX_SECTORS 2040
+
+int nbd_client_co_readv(BlockDriverState *bs, int64_t sector_num,
+                        int nb_sectors, QEMUIOVector *qiov)
 {
-    NBDClientSession *client = nbd_get_client_session(bs);
-    NBDRequest request = {
-        .type = NBD_CMD_WRITE,
-        .from = offset,
-        .len = bytes,
-    };
-    NBDReply reply;
-    ssize_t ret;
-
-    if (flags & BDRV_REQ_FUA) {
-        assert(client->nbdflags & NBD_FLAG_SEND_FUA);
-        request.flags |= NBD_CMD_FLAG_FUA;
+    int offset = 0;
+    int ret;
+    while (nb_sectors > NBD_MAX_SECTORS) {
+        ret = nbd_co_readv_1(bs, sector_num, NBD_MAX_SECTORS, qiov, offset);
+        if (ret < 0) {
+            return ret;
+        }
+        offset += NBD_MAX_SECTORS * 512;
+        sector_num += NBD_MAX_SECTORS;
+        nb_sectors -= NBD_MAX_SECTORS;
    }
-
-    assert(bytes <= NBD_MAX_BUFFER_SIZE);
-
-    nbd_coroutine_start(client, &request);
-    ret = nbd_co_send_request(bs, &request, qiov);
-    if (ret < 0) {
-        reply.error = -ret;
-    } else {
-        nbd_co_receive_reply(client, &request, &reply, NULL);
-    }
-    nbd_coroutine_end(bs, &request);
-    return -reply.error;
+    return nbd_co_readv_1(bs, sector_num, nb_sectors, qiov, offset);
 }

-int nbd_client_co_pwrite_zeroes(BlockDriverState *bs, int64_t offset,
-                                int count, BdrvRequestFlags flags)
+int nbd_client_co_writev(BlockDriverState *bs, int64_t sector_num,
+                         int nb_sectors, QEMUIOVector *qiov)
 {
-    ssize_t ret;
-    NBDClientSession *client = nbd_get_client_session(bs);
-    NBDRequest request = {
-        .type = NBD_CMD_WRITE_ZEROES,
-        .from = offset,
-        .len = count,
-    };
-    NBDReply reply;
-
-    if (!(client->nbdflags & NBD_FLAG_SEND_WRITE_ZEROES)) {
-        return -ENOTSUP;
+    int offset = 0;
+    int ret;
+    while (nb_sectors > NBD_MAX_SECTORS) {
+        ret = nbd_co_writev_1(bs, sector_num, NBD_MAX_SECTORS, qiov, offset);
+        if (ret < 0) {
+            return ret;
+        }
+        offset += NBD_MAX_SECTORS * 512;
+        sector_num += NBD_MAX_SECTORS;
+        nb_sectors -= NBD_MAX_SECTORS;
    }
-
-    if (flags & BDRV_REQ_FUA) {
-        assert(client->nbdflags & NBD_FLAG_SEND_FUA);
-        request.flags |= NBD_CMD_FLAG_FUA;
-    }
-    if (!(flags & BDRV_REQ_MAY_UNMAP)) {
-        request.flags |= NBD_CMD_FLAG_NO_HOLE;
-    }
-
-    nbd_coroutine_start(client, &request);
-    ret = nbd_co_send_request(bs, &request, NULL);
-    if (ret < 0) {
-        reply.error = -ret;
-    } else {
-        nbd_co_receive_reply(client, &request, &reply, NULL);
-    }
-    nbd_coroutine_end(bs, &request);
-    return -reply.error;
+    return nbd_co_writev_1(bs, sector_num, nb_sectors, qiov, offset);
 }

 int nbd_client_co_flush(BlockDriverState *bs)
 {
-    NBDClientSession *client = nbd_get_client_session(bs);
-    NBDRequest request = { .type = NBD_CMD_FLUSH };
-    NBDReply reply;
+    NbdClientSession *client = nbd_get_client_session(bs);
+    struct nbd_request request = { .type = NBD_CMD_FLUSH };
+    struct nbd_reply reply;
    ssize_t ret;

    if (!(client->nbdflags & NBD_FLAG_SEND_FLUSH)) {
        return 0;
    }

+    if (client->nbdflags & NBD_FLAG_SEND_FUA) {
+        request.type |= NBD_CMD_FLAG_FUA;
+    }
+
    request.from = 0;
    request.len = 0;

    nbd_coroutine_start(client, &request);
-    ret = nbd_co_send_request(bs, &request, NULL);
+    ret = nbd_co_send_request(bs, &request, NULL, 0);
    if (ret < 0) {
        reply.error = -ret;
    } else {
-        nbd_co_receive_reply(client, &request, &reply, NULL);
+        nbd_co_receive_reply(client, &request, &reply, NULL, 0);
    }
-    nbd_coroutine_end(bs, &request);
+    nbd_coroutine_end(client, &request);
    return -reply.error;
 }

-int nbd_client_co_pdiscard(BlockDriverState *bs, int64_t offset, int count)
+int nbd_client_co_discard(BlockDriverState *bs, int64_t sector_num,
+                          int nb_sectors)
 {
-    NBDClientSession *client = nbd_get_client_session(bs);
-    NBDRequest request = {
-        .type = NBD_CMD_TRIM,
-        .from = offset,
-        .len = count,
-    };
-    NBDReply reply;
+    NbdClientSession *client = nbd_get_client_session(bs);
+    struct nbd_request request = { .type = NBD_CMD_TRIM };
+    struct nbd_reply reply;
    ssize_t ret;

    if (!(client->nbdflags & NBD_FLAG_SEND_TRIM)) {
        return 0;
    }
+    request.from = sector_num * 512;
+    request.len = nb_sectors * 512;

    nbd_coroutine_start(client, &request);
-    ret = nbd_co_send_request(bs, &request, NULL);
+    ret = nbd_co_send_request(bs, &request, NULL, 0);
    if (ret < 0) {
        reply.error = -ret;
    } else {
-        nbd_co_receive_reply(client, &request, &reply, NULL);
+        nbd_co_receive_reply(client, &request, &reply, NULL, 0);
    }
-    nbd_coroutine_end(bs, &request);
+    nbd_coroutine_end(client, &request);
    return -reply.error;

 }

 void nbd_client_detach_aio_context(BlockDriverState *bs)
 {
-    NBDClientSession *client = nbd_get_client_session(bs);
-    qio_channel_detach_aio_context(QIO_CHANNEL(client->ioc));
+    aio_set_fd_handler(bdrv_get_aio_context(bs),
+                       nbd_get_client_session(bs)->sock, NULL, NULL, NULL);
 }

 void nbd_client_attach_aio_context(BlockDriverState *bs,
                                   AioContext *new_context)
 {
-    NBDClientSession *client = nbd_get_client_session(bs);
-    qio_channel_attach_aio_context(QIO_CHANNEL(client->ioc), new_context);
-    aio_co_schedule(new_context, client->read_reply_co);
+    aio_set_fd_handler(new_context, nbd_get_client_session(bs)->sock,
+                       nbd_reply_ready, NULL, bs);
 }

 void nbd_client_close(BlockDriverState *bs)
 {
-    NBDClientSession *client = nbd_get_client_session(bs);
-    NBDRequest request = { .type = NBD_CMD_DISC };
+    NbdClientSession *client = nbd_get_client_session(bs);
+    struct nbd_request request = {
+        .type = NBD_CMD_DISC,
+        .from = 0,
+        .len = 0
+    };

-    if (client->ioc == NULL) {
+    if (client->sock == -1) {
        return;
    }

-    nbd_send_request(client->ioc, &request);
+    nbd_send_request(client->sock, &request);

    nbd_teardown_connection(bs);
 }

-int nbd_client_init(BlockDriverState *bs,
-                    QIOChannelSocket *sioc,
-                    const char *export,
-                    QCryptoTLSCreds *tlscreds,
-                    const char *hostname,
+int nbd_client_init(BlockDriverState *bs, int sock, const char *export,
                    Error **errp)
 {
-    NBDClientSession *client = nbd_get_client_session(bs);
+    NbdClientSession *client = nbd_get_client_session(bs);
    int ret;

    /* NBD handshake */
    logout("session init %s\n", export);
-    qio_channel_set_blocking(QIO_CHANNEL(sioc), true, NULL);
-
-    ret = nbd_receive_negotiate(QIO_CHANNEL(sioc), export,
-                                &client->nbdflags,
-                                tlscreds, hostname,
-                                &client->ioc,
-                                &client->size, errp);
+    qemu_set_block(sock);
+    ret = nbd_receive_negotiate(sock, export,
+                                &client->nbdflags, &client->size, errp);
    if (ret < 0) {
        logout("Failed to negotiate with the NBD server\n");
+        closesocket(sock);
        return ret;
    }
-    if (client->nbdflags & NBD_FLAG_SEND_FUA) {
-        bs->supported_write_flags = BDRV_REQ_FUA;
-        bs->supported_zero_flags |= BDRV_REQ_FUA;
-    }
-    if (client->nbdflags & NBD_FLAG_SEND_WRITE_ZEROES) {
-        bs->supported_zero_flags |= BDRV_REQ_MAY_UNMAP;
-    }

    qemu_co_mutex_init(&client->send_mutex);
-    qemu_co_queue_init(&client->free_sema);
-    client->sioc = sioc;
-    object_ref(OBJECT(client->sioc));
-
-    if (!client->ioc) {
-        client->ioc = QIO_CHANNEL(sioc);
-        object_ref(OBJECT(client->ioc));
-    }
+    qemu_co_mutex_init(&client->free_sema);
+    client->sock = sock;

    /* Now that we're connected, set the socket to be non-blocking and
     * kick the reply mechanism.  */
-    qio_channel_set_blocking(QIO_CHANNEL(sioc), false, NULL);
-    client->read_reply_co = qemu_coroutine_create(nbd_read_reply_entry, client);
+    qemu_set_nonblock(sock);
    nbd_client_attach_aio_context(bs, bdrv_get_aio_context(bs));

    logout("Established connection with NBD server\n");
@@ -4,7 +4,6 @@
 #include "qemu-common.h"
 #include "block/nbd.h"
 #include "block/block_int.h"
-#include "io/channel-socket.h"

 /* #define DEBUG_NBD */

@@ -17,39 +16,35 @@

 #define MAX_NBD_REQUESTS    16

-typedef struct NBDClientSession {
-    QIOChannelSocket *sioc; /* The master data channel */
-    QIOChannel *ioc; /* The current I/O channel which may differ (eg TLS) */
-    uint16_t nbdflags;
+typedef struct NbdClientSession {
+    int sock;
+    uint32_t nbdflags;
    off_t size;

    CoMutex send_mutex;
-    CoQueue free_sema;
-    Coroutine *read_reply_co;
+    CoMutex free_sema;
+    Coroutine *send_coroutine;
    int in_flight;

    Coroutine *recv_coroutine[MAX_NBD_REQUESTS];
-    NBDReply reply;
-} NBDClientSession;
+    struct nbd_reply reply;

-NBDClientSession *nbd_get_client_session(BlockDriverState *bs);
+    bool is_unix;
+} NbdClientSession;

-int nbd_client_init(BlockDriverState *bs,
-                    QIOChannelSocket *sock,
-                    const char *export_name,
-                    QCryptoTLSCreds *tlscreds,
-                    const char *hostname,
+NbdClientSession *nbd_get_client_session(BlockDriverState *bs);
+
+int nbd_client_init(BlockDriverState *bs, int sock, const char *export_name,
                    Error **errp);
 void nbd_client_close(BlockDriverState *bs);

-int nbd_client_co_pdiscard(BlockDriverState *bs, int64_t offset, int count);
+int nbd_client_co_discard(BlockDriverState *bs, int64_t sector_num,
+                          int nb_sectors);
 int nbd_client_co_flush(BlockDriverState *bs);
-int nbd_client_co_pwritev(BlockDriverState *bs, uint64_t offset,
-                          uint64_t bytes, QEMUIOVector *qiov, int flags);
-int nbd_client_co_pwrite_zeroes(BlockDriverState *bs, int64_t offset,
-                                int count, BdrvRequestFlags flags);
-int nbd_client_co_preadv(BlockDriverState *bs, uint64_t offset,
-                         uint64_t bytes, QEMUIOVector *qiov, int flags);
+int nbd_client_co_writev(BlockDriverState *bs, int64_t sector_num,
+                         int nb_sectors, QEMUIOVector *qiov);
+int nbd_client_co_readv(BlockDriverState *bs, int64_t sector_num,
+                        int nb_sectors, QEMUIOVector *qiov);

 void nbd_client_detach_aio_context(BlockDriverState *bs);
 void nbd_client_attach_aio_context(BlockDriverState *bs,
@@ -26,29 +26,24 @@
 * THE SOFTWARE.
 */

-#include "qemu/osdep.h"
 #include "block/nbd-client.h"
-#include "qapi/error.h"
 #include "qemu/uri.h"
 #include "block/block_int.h"
 #include "qemu/module.h"
-#include "qapi-visit.h"
-#include "qapi/qobject-input-visitor.h"
-#include "qapi/qobject-output-visitor.h"
+#include "qemu/sockets.h"
 #include "qapi/qmp/qdict.h"
 #include "qapi/qmp/qjson.h"
 #include "qapi/qmp/qint.h"
 #include "qapi/qmp/qstring.h"
-#include "qemu/cutils.h"
+
+#include <sys/types.h>
+#include <unistd.h>

 #define EN_OPTSTR ":exportname="

 typedef struct BDRVNBDState {
-    NBDClientSession client;
-
-    /* For nbd_refresh_filename() */
-    SocketAddressFlat *saddr;
-    char *export, *tlscredsid;
+    NbdClientSession client;
+    QemuOpts *socket_opts;
 } BDRVNBDState;

 static int nbd_parse_uri(const char *filename, QDict *options)
@@ -65,11 +60,11 @@ static int nbd_parse_uri(const char *filename, QDict *options)
    }

    /* transport */
-    if (!g_strcmp0(uri->scheme, "nbd")) {
+    if (!strcmp(uri->scheme, "nbd")) {
        is_unix = false;
-    } else if (!g_strcmp0(uri->scheme, "nbd+tcp")) {
+    } else if (!strcmp(uri->scheme, "nbd+tcp")) {
        is_unix = false;
-    } else if (!g_strcmp0(uri->scheme, "nbd+unix")) {
+    } else if (!strcmp(uri->scheme, "nbd+unix")) {
        is_unix = true;
    } else {
        ret = -EINVAL;
@@ -79,7 +74,7 @@ static int nbd_parse_uri(const char *filename, QDict *options)
    p = uri->path ? uri->path : "/";
    p += strspn(p, "/");
    if (p[0]) {
-        qdict_put_str(options, "export", p);
+        qdict_put(options, "export", qstring_from_str(p));
    }

    qp = query_params_parse(uri->query);
@@ -94,12 +89,9 @@ static int nbd_parse_uri(const char *filename, QDict *options)
            ret = -EINVAL;
            goto out;
        }
-        qdict_put_str(options, "server.type", "unix");
-        qdict_put_str(options, "server.path", qp->p[0].value);
+        qdict_put(options, "path", qstring_from_str(qp->p[0].value));
    } else {
        QString *host;
-        char *port_str;
-
        /* nbd[+tcp]://host[:port]/export */
        if (!uri->server) {
            ret = -EINVAL;
@@ -114,12 +106,12 @@ static int nbd_parse_uri(const char *filename, QDict *options)
            host = qstring_from_str(uri->server);
        }

-        qdict_put_str(options, "server.type", "inet");
-        qdict_put(options, "server.host", host);
-
-        port_str = g_strdup_printf("%d", uri->port ?: NBD_DEFAULT_PORT);
-        qdict_put_str(options, "server.port", port_str);
-        g_free(port_str);
+        qdict_put(options, "host", host);
+        if (uri->port) {
+            char* port_str = g_strdup_printf("%d", uri->port);
+            qdict_put(options, "port", qstring_from_str(port_str));
+            g_free(port_str);
+        }
    }

 out:
@@ -130,26 +122,6 @@ out:
    return ret;
 }

-static bool nbd_has_filename_options_conflict(QDict *options, Error **errp)
-{
-    const QDictEntry *e;
-
-    for (e = qdict_first(options); e; e = qdict_next(options, e)) {
-        if (!strcmp(e->key, "host") ||
-            !strcmp(e->key, "port") ||
-            !strcmp(e->key, "path") ||
-            !strcmp(e->key, "export") ||
-            strstart(e->key, "server.", NULL))
-        {
-            error_setg(errp, "Option '%s' cannot be used with a file name",
-                       e->key);
-            return true;
-        }
-    }
-
-    return false;
-}
-
 static void nbd_parse_filename(const char *filename, QDict *options,
                               Error **errp)
 {
@@ -158,7 +130,12 @@ static void nbd_parse_filename(const char *filename, QDict *options,
    const char *host_spec;
    const char *unixpath;

-    if (nbd_has_filename_options_conflict(options, errp)) {
+    if (qdict_haskey(options, "host")
+        || qdict_haskey(options, "port")
+        || qdict_haskey(options, "path"))
+    {
+        error_setg(errp, "host/port/path and a file name may not be specified "
+                         "at the same time");
        return;
    }

@@ -180,7 +157,7 @@ static void nbd_parse_filename(const char *filename, QDict *options,
        export_name[0] = 0; /* truncate 'file' */
        export_name += strlen(EN_OPTSTR);

-        qdict_put_str(options, "export", export_name);
+        qdict_put(options, "export", qstring_from_str(export_name));
    }

    /* extract the host_spec - fail if it's not nbd:... */
@@ -195,8 +172,7 @@ static void nbd_parse_filename(const char *filename, QDict *options,

    /* are we a UNIX or TCP socket? */
    if (strstart(host_spec, "unix:", &unixpath)) {
-        qdict_put_str(options, "server.type", "unix");
-        qdict_put_str(options, "server.path", unixpath);
+        qdict_put(options, "path", qstring_from_str(unixpath));
    } else {
        InetSocketAddress *addr = NULL;

@@ -205,9 +181,8 @@ static void nbd_parse_filename(const char *filename, QDict *options,
            goto out;
        }

-        qdict_put_str(options, "server.type", "inet");
-        qdict_put_str(options, "server.host", addr->host);
-        qdict_put_str(options, "server.port", addr->port);
+        qdict_put(options, "host", qstring_from_str(addr->host));
+        qdict_put(options, "port", qstring_from_str(addr->port));
        qapi_free_InetSocketAddress(addr);
    }

@@ -215,257 +190,110 @@ out:
    g_free(file);
 }

-static bool nbd_process_legacy_socket_options(QDict *output_options,
-                                              QemuOpts *legacy_opts,
-                                              Error **errp)
+static void nbd_config(BDRVNBDState *s, QDict *options, char **export,
+                       Error **errp)
 {
-    const char *path = qemu_opt_get(legacy_opts, "path");
-    const char *host = qemu_opt_get(legacy_opts, "host");
-    const char *port = qemu_opt_get(legacy_opts, "port");
-    const QDictEntry *e;
-
-    if (!path && !host && !port) {
-        return true;
-    }
-
-    for (e = qdict_first(output_options); e; e = qdict_next(output_options, e))
-    {
-        if (strstart(e->key, "server.", NULL)) {
-            error_setg(errp, "Cannot use 'server' and path/host/port at the "
-                       "same time");
-            return false;
-        }
-    }
-
-    if (path && host) {
-        error_setg(errp, "path and host may not be used at the same time");
-        return false;
-    } else if (path) {
-        if (port) {
-            error_setg(errp, "port may not be used without host");
-            return false;
-        }
-
-        qdict_put_str(output_options, "server.type", "unix");
-        qdict_put_str(output_options, "server.path", path);
-    } else if (host) {
-        qdict_put_str(output_options, "server.type", "inet");
-        qdict_put_str(output_options, "server.host", host);
-        qdict_put_str(output_options, "server.port",
-                      port ?: stringify(NBD_DEFAULT_PORT));
-    }
-
-    return true;
-}
-
-static SocketAddressFlat *nbd_config(BDRVNBDState *s, QDict *options,
-                                     Error **errp)
-{
-    SocketAddressFlat *saddr = NULL;
-    QDict *addr = NULL;
-    QObject *crumpled_addr = NULL;
-    Visitor *iv = NULL;
    Error *local_err = NULL;

-    qdict_extract_subqdict(options, &addr, "server.");
-    if (!qdict_size(addr)) {
-        error_setg(errp, "NBD server address missing");
-        goto done;
+    if (qdict_haskey(options, "path") == qdict_haskey(options, "host")) {
+        if (qdict_haskey(options, "path")) {
+            error_setg(errp, "path and host may not be used at the same time.");
+        } else {
+            error_setg(errp, "one of path and host must be specified.");
+        }
+        return;
    }

-    crumpled_addr = qdict_crumple(addr, errp);
-    if (!crumpled_addr) {
-        goto done;
-    }
+    s->client.is_unix = qdict_haskey(options, "path");
+    s->socket_opts = qemu_opts_create(&socket_optslist, NULL, 0,
+                                      &error_abort);

-    /*
-     * FIXME .numeric, .to, .ipv4 or .ipv6 don't work with -drive
-     * server.type=inet.  .to doesn't matter, it's ignored anyway.
-     * That's because when @options come from -blockdev or
-     * blockdev_add, members are typed according to the QAPI schema,
-     * but when they come from -drive, they're all QString.  The
-     * visitor expects the former.
-     */
-    iv = qobject_input_visitor_new(crumpled_addr);
-    visit_type_SocketAddressFlat(iv, NULL, &saddr, &local_err);
+    qemu_opts_absorb_qdict(s->socket_opts, options, &local_err);
    if (local_err) {
        error_propagate(errp, local_err);
-        goto done;
+        return;
    }

-done:
-    QDECREF(addr);
-    qobject_decref(crumpled_addr);
-    visit_free(iv);
-    return saddr;
+    if (!qemu_opt_get(s->socket_opts, "port")) {
+        qemu_opt_set_number(s->socket_opts, "port", NBD_DEFAULT_PORT,
+                            &error_abort);
+    }
+
+    *export = g_strdup(qdict_get_try_str(options, "export"));
+    if (*export) {
+        qdict_del(options, "export");
+    }
 }

-NBDClientSession *nbd_get_client_session(BlockDriverState *bs)
+NbdClientSession *nbd_get_client_session(BlockDriverState *bs)
 {
    BDRVNBDState *s = bs->opaque;
    return &s->client;
 }

-static QIOChannelSocket *nbd_establish_connection(SocketAddressFlat *saddr_flat,
-                                                  Error **errp)
+static int nbd_establish_connection(BlockDriverState *bs, Error **errp)
 {
-    SocketAddress *saddr = socket_address_crumple(saddr_flat);
-    QIOChannelSocket *sioc;
-    Error *local_err = NULL;
+    BDRVNBDState *s = bs->opaque;
+    int sock;

-    sioc = qio_channel_socket_new();
-    qio_channel_set_name(QIO_CHANNEL(sioc), "nbd-client");
-
-    qio_channel_socket_connect_sync(sioc,
-                                    saddr,
-                                    &local_err);
-    qapi_free_SocketAddress(saddr);
-    if (local_err) {
-        object_unref(OBJECT(sioc));
-        error_propagate(errp, local_err);
-        return NULL;
+    if (s->client.is_unix) {
+        sock = unix_connect_opts(s->socket_opts, errp, NULL, NULL);
+    } else {
+        sock = inet_connect_opts(s->socket_opts, errp, NULL, NULL);
+        if (sock >= 0) {
+            socket_set_nodelay(sock);
+        }
    }

-    qio_channel_set_delay(QIO_CHANNEL(sioc), false);
+    /* Failed to establish connection */
+    if (sock < 0) {
+        logout("Failed to establish connection to NBD server\n");
+        return -EIO;
+    }

-    return sioc;
+    return sock;
 }

-
-static QCryptoTLSCreds *nbd_get_tls_creds(const char *id, Error **errp)
-{
-    Object *obj;
-    QCryptoTLSCreds *creds;
-
-    obj = object_resolve_path_component(
-        object_get_objects_root(), id);
-    if (!obj) {
-        error_setg(errp, "No TLS credentials with id '%s'",
-                   id);
-        return NULL;
-    }
-    creds = (QCryptoTLSCreds *)
-        object_dynamic_cast(obj, TYPE_QCRYPTO_TLS_CREDS);
-    if (!creds) {
-        error_setg(errp, "Object with id '%s' is not TLS credentials",
-                   id);
-        return NULL;
-    }
-
-    if (creds->endpoint != QCRYPTO_TLS_CREDS_ENDPOINT_CLIENT) {
-        error_setg(errp,
-                   "Expecting TLS credentials with a client endpoint");
-        return NULL;
-    }
-    object_ref(obj);
-    return creds;
-}
-
-
-static QemuOptsList nbd_runtime_opts = {
-    .name = "nbd",
-    .head = QTAILQ_HEAD_INITIALIZER(nbd_runtime_opts.head),
-    .desc = {
-        {
-            .name = "host",
-            .type = QEMU_OPT_STRING,
-            .help = "TCP host to connect to",
-        },
-        {
-            .name = "port",
-            .type = QEMU_OPT_STRING,
-            .help = "TCP port to connect to",
-        },
-        {
-            .name = "path",
-            .type = QEMU_OPT_STRING,
-            .help = "Unix socket path to connect to",
-        },
-        {
-            .name = "export",
-            .type = QEMU_OPT_STRING,
-            .help = "Name of the NBD export to open",
-        },
-        {
-            .name = "tls-creds",
-            .type = QEMU_OPT_STRING,
-            .help = "ID of the TLS credentials to use",
-        },
-    },
-};
-
 static int nbd_open(BlockDriverState *bs, QDict *options, int flags,
                    Error **errp)
 {
    BDRVNBDState *s = bs->opaque;
-    QemuOpts *opts = NULL;
+    char *export = NULL;
+    int result, sock;
    Error *local_err = NULL;
-    QIOChannelSocket *sioc = NULL;
-    QCryptoTLSCreds *tlscreds = NULL;
-    const char *hostname = NULL;
-    int ret = -EINVAL;
-
-    opts = qemu_opts_create(&nbd_runtime_opts, NULL, 0, &error_abort);
-    qemu_opts_absorb_qdict(opts, options, &local_err);
-    if (local_err) {
-        error_propagate(errp, local_err);
-        goto error;
-    }
-
-    /* Translate @host, @port, and @path to a SocketAddressFlat */
-    if (!nbd_process_legacy_socket_options(options, opts, errp)) {
-        goto error;
-    }

    /* Pop the config into our state object. Exit if invalid. */
-    s->saddr = nbd_config(s, options, errp);
-    if (!s->saddr) {
-        goto error;
-    }
-
-    s->export = g_strdup(qemu_opt_get(opts, "export"));
-
-    s->tlscredsid = g_strdup(qemu_opt_get(opts, "tls-creds"));
-    if (s->tlscredsid) {
-        tlscreds = nbd_get_tls_creds(s->tlscredsid, errp);
-        if (!tlscreds) {
-            goto error;
-        }
-
-        /* TODO SOCKET_ADDRESS_KIND_FD where fd has AF_INET or AF_INET6 */
-        if (s->saddr->type != SOCKET_ADDRESS_FLAT_TYPE_INET) {
-            error_setg(errp, "TLS only supported over IP sockets");
-            goto error;
-        }
-        hostname = s->saddr->u.inet.host;
+    nbd_config(s, options, &export, &local_err);
+    if (local_err) {
+        error_propagate(errp, local_err);
+        return -EINVAL;
    }

    /* establish TCP connection, return error if it fails
     * TODO: Configurable retry-until-timeout behaviour.
     */
-    sioc = nbd_establish_connection(s->saddr, errp);
-    if (!sioc) {
-        ret = -ECONNREFUSED;
-        goto error;
+    sock = nbd_establish_connection(bs, errp);
+    if (sock < 0) {
+        g_free(export);
+        return sock;
    }

    /* NBD handshake */
-    ret = nbd_client_init(bs, sioc, s->export,
-                          tlscreds, hostname, errp);
- error:
-    if (sioc) {
-        object_unref(OBJECT(sioc));
-    }
-    if (tlscreds) {
-        object_unref(OBJECT(tlscreds));
-    }
-    if (ret < 0) {
-        qapi_free_SocketAddressFlat(s->saddr);
-        g_free(s->export);
-        g_free(s->tlscredsid);
-    }
-    qemu_opts_del(opts);
-    return ret;
+    result = nbd_client_init(bs, sock, export, errp);
+    g_free(export);
+    return result;
+}
+
+static int nbd_co_readv(BlockDriverState *bs, int64_t sector_num,
+                        int nb_sectors, QEMUIOVector *qiov)
+{
+    return nbd_client_co_readv(bs, sector_num, nb_sectors, qiov);
+}
+
+static int nbd_co_writev(BlockDriverState *bs, int64_t sector_num,
+                         int nb_sectors, QEMUIOVector *qiov)
+{
+    return nbd_client_co_writev(bs, sector_num, nb_sectors, qiov);
 }

 static int nbd_co_flush(BlockDriverState *bs)
@@ -475,20 +303,22 @@ static int nbd_co_flush(BlockDriverState *bs)

 static void nbd_refresh_limits(BlockDriverState *bs, Error **errp)
 {
-    bs->bl.max_pdiscard = NBD_MAX_BUFFER_SIZE;
-    bs->bl.max_pwrite_zeroes = NBD_MAX_BUFFER_SIZE;
-    bs->bl.max_transfer = NBD_MAX_BUFFER_SIZE;
+    bs->bl.max_discard = UINT32_MAX >> BDRV_SECTOR_BITS;
+    bs->bl.max_transfer_length = UINT32_MAX >> BDRV_SECTOR_BITS;
+}
+
+static int nbd_co_discard(BlockDriverState *bs, int64_t sector_num,
+                          int nb_sectors)
+{
+    return nbd_client_co_discard(bs, sector_num, nb_sectors);
 }

 static void nbd_close(BlockDriverState *bs)
 {
    BDRVNBDState *s = bs->opaque;

+    qemu_opts_del(s->socket_opts);
    nbd_client_close(bs);
-
-    qapi_free_SocketAddressFlat(s->saddr);
-    g_free(s->export);
-    g_free(s->tlscredsid);
 }

 static int64_t nbd_getlength(BlockDriverState *bs)
@@ -509,54 +339,48 @@ static void nbd_attach_aio_context(BlockDriverState *bs,
    nbd_client_attach_aio_context(bs, new_context);
 }

-static void nbd_refresh_filename(BlockDriverState *bs, QDict *options)
+static void nbd_refresh_filename(BlockDriverState *bs)
 {
-    BDRVNBDState *s = bs->opaque;
    QDict *opts = qdict_new();
-    QObject *saddr_qdict;
-    Visitor *ov;
-    const char *host = NULL, *port = NULL, *path = NULL;
+    const char *path   = qdict_get_try_str(bs->options, "path");
+    const char *host   = qdict_get_try_str(bs->options, "host");
+    const char *port   = qdict_get_try_str(bs->options, "port");
+    const char *export = qdict_get_try_str(bs->options, "export");

-    if (s->saddr->type == SOCKET_ADDRESS_FLAT_TYPE_INET) {
-        const InetSocketAddress *inet = &s->saddr->u.inet;
-        if (!inet->has_ipv4 && !inet->has_ipv6 && !inet->has_to) {
-            host = inet->host;
-            port = inet->port;
-        }
-    } else if (s->saddr->type == SOCKET_ADDRESS_FLAT_TYPE_UNIX) {
-        path = s->saddr->u.q_unix.path;
-    } /* else can't represent as pseudo-filename */
+    qdict_put_obj(opts, "driver", QOBJECT(qstring_from_str("nbd")));

-    qdict_put_str(opts, "driver", "nbd");
-
-    if (path && s->export) {
+    if (path && export) {
        snprintf(bs->exact_filename, sizeof(bs->exact_filename),
-                 "nbd+unix:///%s?socket=%s", s->export, path);
-    } else if (path && !s->export) {
+                 "nbd+unix:///%s?socket=%s", export, path);
+    } else if (path && !export) {
        snprintf(bs->exact_filename, sizeof(bs->exact_filename),
                 "nbd+unix://?socket=%s", path);
-    } else if (host && s->export) {
+    } else if (!path && export && port) {
        snprintf(bs->exact_filename, sizeof(bs->exact_filename),
-                 "nbd://%s:%s/%s", host, port, s->export);
-    } else if (host && !s->export) {
+                 "nbd://%s:%s/%s", host, port, export);
+    } else if (!path && export && !port) {
+        snprintf(bs->exact_filename, sizeof(bs->exact_filename),
+                 "nbd://%s/%s", host, export);
+    } else if (!path && !export && port) {
        snprintf(bs->exact_filename, sizeof(bs->exact_filename),
                 "nbd://%s:%s", host, port);
+    } else if (!path && !export && !port) {
+        snprintf(bs->exact_filename, sizeof(bs->exact_filename),
+                 "nbd://%s", host);
    }

-    ov = qobject_output_visitor_new(&saddr_qdict);
-    visit_type_SocketAddressFlat(ov, NULL, &s->saddr, &error_abort);
-    visit_complete(ov, &saddr_qdict);
-    visit_free(ov);
-    qdict_put_obj(opts, "server", saddr_qdict);
-
-    if (s->export) {
-        qdict_put_str(opts, "export", s->export);
+    if (path) {
+        qdict_put_obj(opts, "path", QOBJECT(qstring_from_str(path)));
+    } else if (port) {
+        qdict_put_obj(opts, "host", QOBJECT(qstring_from_str(host)));
+        qdict_put_obj(opts, "port", QOBJECT(qstring_from_str(port)));
+    } else {
+        qdict_put_obj(opts, "host", QOBJECT(qstring_from_str(host)));
    }
-    if (s->tlscredsid) {
-        qdict_put_str(opts, "tls-creds", s->tlscredsid);
+    if (export) {
+        qdict_put_obj(opts, "export", QOBJECT(qstring_from_str(export)));
    }

-    qdict_flatten(opts);
    bs->full_open_options = opts;
 }

@@ -566,12 +390,11 @@ static BlockDriver bdrv_nbd = {
    .instance_size              = sizeof(BDRVNBDState),
    .bdrv_parse_filename        = nbd_parse_filename,
    .bdrv_file_open             = nbd_open,
-    .bdrv_co_preadv             = nbd_client_co_preadv,
-    .bdrv_co_pwritev            = nbd_client_co_pwritev,
-    .bdrv_co_pwrite_zeroes      = nbd_client_co_pwrite_zeroes,
+    .bdrv_co_readv              = nbd_co_readv,
+    .bdrv_co_writev             = nbd_co_writev,
    .bdrv_close                 = nbd_close,
    .bdrv_co_flush_to_os        = nbd_co_flush,
-    .bdrv_co_pdiscard           = nbd_client_co_pdiscard,
+    .bdrv_co_discard            = nbd_co_discard,
    .bdrv_refresh_limits        = nbd_refresh_limits,
    .bdrv_getlength             = nbd_getlength,
    .bdrv_detach_aio_context    = nbd_detach_aio_context,
@@ -585,12 +408,11 @@ static BlockDriver bdrv_nbd_tcp = {
    .instance_size              = sizeof(BDRVNBDState),
    .bdrv_parse_filename        = nbd_parse_filename,
    .bdrv_file_open             = nbd_open,
-    .bdrv_co_preadv             = nbd_client_co_preadv,
-    .bdrv_co_pwritev            = nbd_client_co_pwritev,
-    .bdrv_co_pwrite_zeroes      = nbd_client_co_pwrite_zeroes,
+    .bdrv_co_readv              = nbd_co_readv,
+    .bdrv_co_writev             = nbd_co_writev,
    .bdrv_close                 = nbd_close,
    .bdrv_co_flush_to_os        = nbd_co_flush,
-    .bdrv_co_pdiscard           = nbd_client_co_pdiscard,
+    .bdrv_co_discard            = nbd_co_discard,
    .bdrv_refresh_limits        = nbd_refresh_limits,
    .bdrv_getlength             = nbd_getlength,
    .bdrv_detach_aio_context    = nbd_detach_aio_context,
@@ -604,12 +426,11 @@ static BlockDriver bdrv_nbd_unix = {
    .instance_size              = sizeof(BDRVNBDState),
    .bdrv_parse_filename        = nbd_parse_filename,
    .bdrv_file_open             = nbd_open,
-    .bdrv_co_preadv             = nbd_client_co_preadv,
-    .bdrv_co_pwritev            = nbd_client_co_pwritev,
-    .bdrv_co_pwrite_zeroes      = nbd_client_co_pwrite_zeroes,
+    .bdrv_co_readv              = nbd_co_readv,
+    .bdrv_co_writev             = nbd_co_writev,
    .bdrv_close                 = nbd_close,
    .bdrv_co_flush_to_os        = nbd_co_flush,
-    .bdrv_co_pdiscard           = nbd_client_co_pdiscard,
+    .bdrv_co_discard            = nbd_co_discard,
    .bdrv_refresh_limits        = nbd_refresh_limits,
    .bdrv_getlength             = nbd_getlength,
    .bdrv_detach_aio_context    = nbd_detach_aio_context,
@@ -1,7 +1,7 @@
 /*
 * QEMU Block driver for native access to files on NFS shares
 *
- * Copyright (c) 2014-2016 Peter Lieven <pl@kamp.de>
+ * Copyright (c) 2014 Peter Lieven <pl@kamp.de>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
@@ -22,31 +22,20 @@
 * THE SOFTWARE.
 */

-#include "qemu/osdep.h"
+#include "config-host.h"

 #include <poll.h>
 #include "qemu-common.h"
 #include "qemu/config-file.h"
 #include "qemu/error-report.h"
-#include "qapi/error.h"
 #include "block/block_int.h"
 #include "trace.h"
 #include "qemu/iov.h"
 #include "qemu/uri.h"
-#include "qemu/cutils.h"
 #include "sysemu/sysemu.h"
-#include "qapi/qmp/qdict.h"
-#include "qapi/qmp/qint.h"
-#include "qapi/qmp/qstring.h"
-#include "qapi-visit.h"
-#include "qapi/qobject-input-visitor.h"
-#include "qapi/qobject-output-visitor.h"
 #include <nfsc/libnfs.h>

-
 #define QEMU_NFS_MAX_READAHEAD_SIZE 1048576
-#define QEMU_NFS_MAX_PAGECACHE_SIZE (8388608 / NFS_BLKSIZE)
-#define QEMU_NFS_MAX_DEBUG_LEVEL 2

 typedef struct NFSClient {
    struct nfs_context *context;
@@ -54,148 +43,30 @@ typedef struct NFSClient {
    int events;
    bool has_zero_init;
    AioContext *aio_context;
-    QemuMutex mutex;
-    blkcnt_t st_blocks;
-    bool cache_used;
-    NFSServer *server;
-    char *path;
-    int64_t uid, gid, tcp_syncnt, readahead, pagecache, debug;
 } NFSClient;

 typedef struct NFSRPC {
-    BlockDriverState *bs;
    int ret;
    int complete;
    QEMUIOVector *iov;
    struct stat *st;
    Coroutine *co;
+    QEMUBH *bh;
    NFSClient *client;
 } NFSRPC;

-static int nfs_parse_uri(const char *filename, QDict *options, Error **errp)
-{
-    URI *uri = NULL;
-    QueryParams *qp = NULL;
-    int ret = -EINVAL, i;
-
-    uri = uri_parse(filename);
-    if (!uri) {
-        error_setg(errp, "Invalid URI specified");
-        goto out;
-    }
-    if (g_strcmp0(uri->scheme, "nfs") != 0) {
-        error_setg(errp, "URI scheme must be 'nfs'");
-        goto out;
-    }
-
-    if (!uri->server) {
-        error_setg(errp, "missing hostname in URI");
-        goto out;
-    }
-
-    if (!uri->path) {
-        error_setg(errp, "missing file path in URI");
-        goto out;
-    }
-
-    qp = query_params_parse(uri->query);
-    if (!qp) {
-        error_setg(errp, "could not parse query parameters");
-        goto out;
-    }
-
-    qdict_put_str(options, "server.host", uri->server);
-    qdict_put_str(options, "server.type", "inet");
-    qdict_put_str(options, "path", uri->path);
-
-    for (i = 0; i < qp->n; i++) {
-        unsigned long long val;
-        if (!qp->p[i].value) {
-            error_setg(errp, "Value for NFS parameter expected: %s",
-                       qp->p[i].name);
-            goto out;
-        }
-        if (parse_uint_full(qp->p[i].value, &val, 0)) {
-            error_setg(errp, "Illegal value for NFS parameter: %s",
-                       qp->p[i].name);
-            goto out;
-        }
-        if (!strcmp(qp->p[i].name, "uid")) {
-            qdict_put_str(options, "user", qp->p[i].value);
-        } else if (!strcmp(qp->p[i].name, "gid")) {
-            qdict_put_str(options, "group", qp->p[i].value);
-        } else if (!strcmp(qp->p[i].name, "tcp-syncnt")) {
-            qdict_put_str(options, "tcp-syn-count", qp->p[i].value);
-        } else if (!strcmp(qp->p[i].name, "readahead")) {
-            qdict_put_str(options, "readahead-size", qp->p[i].value);
-        } else if (!strcmp(qp->p[i].name, "pagecache")) {
-            qdict_put_str(options, "page-cache-size", qp->p[i].value);
-        } else if (!strcmp(qp->p[i].name, "debug")) {
-            qdict_put_str(options, "debug", qp->p[i].value);
-        } else {
-            error_setg(errp, "Unknown NFS parameter name: %s",
-                       qp->p[i].name);
-            goto out;
-        }
-    }
-    ret = 0;
-out:
-    if (qp) {
-        query_params_free(qp);
-    }
-    if (uri) {
-        uri_free(uri);
-    }
-    return ret;
-}
-
-static bool nfs_has_filename_options_conflict(QDict *options, Error **errp)
-{
-    const QDictEntry *qe;
-
-    for (qe = qdict_first(options); qe; qe = qdict_next(options, qe)) {
-        if (!strcmp(qe->key, "host") ||
-            !strcmp(qe->key, "path") ||
-            !strcmp(qe->key, "user") ||
-            !strcmp(qe->key, "group") ||
-            !strcmp(qe->key, "tcp-syn-count") ||
-            !strcmp(qe->key, "readahead-size") ||
-            !strcmp(qe->key, "page-cache-size") ||
-            !strcmp(qe->key, "debug") ||
-            strstart(qe->key, "server.", NULL))
-        {
-            error_setg(errp, "Option %s cannot be used with a filename",
-                       qe->key);
-            return true;
-        }
-    }
-
-    return false;
-}
-
-static void nfs_parse_filename(const char *filename, QDict *options,
-                               Error **errp)
-{
-    if (nfs_has_filename_options_conflict(options, errp)) {
-        return;
-    }
-
-    nfs_parse_uri(filename, options, errp);
-}
-
 static void nfs_process_read(void *arg);
 static void nfs_process_write(void *arg);

-/* Called with QemuMutex held.  */
 static void nfs_set_events(NFSClient *client)
 {
    int ev = nfs_which_events(client->context);
    if (ev != client->events) {
-        aio_set_fd_handler(client->aio_context, nfs_get_fd(client->context),
-                           false,
+        aio_set_fd_handler(client->aio_context,
+                           nfs_get_fd(client->context),
                           (ev & POLLIN) ? nfs_process_read : NULL,
                           (ev & POLLOUT) ? nfs_process_write : NULL,
-                           NULL, client);
+                           client);

    }
    client->events = ev;
@@ -204,48 +75,39 @@ static void nfs_set_events(NFSClient *client)
 static void nfs_process_read(void *arg)
 {
    NFSClient *client = arg;
-
-    qemu_mutex_lock(&client->mutex);
    nfs_service(client->context, POLLIN);
    nfs_set_events(client);
-    qemu_mutex_unlock(&client->mutex);
 }

 static void nfs_process_write(void *arg)
 {
    NFSClient *client = arg;
-
-    qemu_mutex_lock(&client->mutex);
    nfs_service(client->context, POLLOUT);
    nfs_set_events(client);
-    qemu_mutex_unlock(&client->mutex);
 }

-static void nfs_co_init_task(BlockDriverState *bs, NFSRPC *task)
+static void nfs_co_init_task(NFSClient *client, NFSRPC *task)
 {
    *task = (NFSRPC) {
        .co             = qemu_coroutine_self(),
-        .bs             = bs,
-        .client         = bs->opaque,
+        .client         = client,
    };
 }

 static void nfs_co_generic_bh_cb(void *opaque)
 {
    NFSRPC *task = opaque;
-
    task->complete = 1;
-    aio_co_wake(task->co);
+    qemu_bh_delete(task->bh);
+    qemu_coroutine_enter(task->co, NULL);
 }

-/* Called (via nfs_service) with QemuMutex held.  */
 static void
 nfs_co_generic_cb(int ret, struct nfs_context *nfs, void *data,
                  void *private_data)
 {
    NFSRPC *task = private_data;
    task->ret = ret;
-    assert(!task->st);
    if (task->ret > 0 && task->iov) {
        if (task->ret <= task->iov->size) {
            qemu_iovec_from_buf(task->iov, 0, data, task->ret);
@@ -253,33 +115,40 @@ nfs_co_generic_cb(int ret, struct nfs_context *nfs, void *data,
            task->ret = -EIO;
        }
    }
+    if (task->ret == 0 && task->st) {
+        memcpy(task->st, data, sizeof(struct stat));
+    }
    if (task->ret < 0) {
        error_report("NFS Error: %s", nfs_get_error(nfs));
    }
-    aio_bh_schedule_oneshot(task->client->aio_context,
-                            nfs_co_generic_bh_cb, task);
+    if (task->co) {
+        task->bh = aio_bh_new(task->client->aio_context,
+                              nfs_co_generic_bh_cb, task);
+        qemu_bh_schedule(task->bh);
+    } else {
+        task->complete = 1;
+    }
 }

-static int coroutine_fn nfs_co_preadv(BlockDriverState *bs, uint64_t offset,
-                                      uint64_t bytes, QEMUIOVector *iov,
-                                      int flags)
+static int coroutine_fn nfs_co_readv(BlockDriverState *bs,
+                                     int64_t sector_num, int nb_sectors,
+                                     QEMUIOVector *iov)
 {
    NFSClient *client = bs->opaque;
    NFSRPC task;

-    nfs_co_init_task(bs, &task);
+    nfs_co_init_task(client, &task);
    task.iov = iov;

-    qemu_mutex_lock(&client->mutex);
    if (nfs_pread_async(client->context, client->fh,
-                        offset, bytes, nfs_co_generic_cb, &task) != 0) {
-        qemu_mutex_unlock(&client->mutex);
+                        sector_num * BDRV_SECTOR_SIZE,
+                        nb_sectors * BDRV_SECTOR_SIZE,
+                        nfs_co_generic_cb, &task) != 0) {
        return -ENOMEM;
    }

-    nfs_set_events(client);
-    qemu_mutex_unlock(&client->mutex);
    while (!task.complete) {
+        nfs_set_events(client);
        qemu_coroutine_yield();
    }

@@ -295,50 +164,39 @@ static int coroutine_fn nfs_co_preadv(BlockDriverState *bs, uint64_t offset,
    return 0;
 }

-static int coroutine_fn nfs_co_pwritev(BlockDriverState *bs, uint64_t offset,
-                                       uint64_t bytes, QEMUIOVector *iov,
-                                       int flags)
+static int coroutine_fn nfs_co_writev(BlockDriverState *bs,
+                                        int64_t sector_num, int nb_sectors,
+                                        QEMUIOVector *iov)
 {
    NFSClient *client = bs->opaque;
    NFSRPC task;
    char *buf = NULL;
-    bool my_buffer = false;

-    nfs_co_init_task(bs, &task);
+    nfs_co_init_task(client, &task);

-    if (iov->niov != 1) {
-        buf = g_try_malloc(bytes);
-        if (bytes && buf == NULL) {
-            return -ENOMEM;
-        }
-        qemu_iovec_to_buf(iov, 0, buf, bytes);
-        my_buffer = true;
-    } else {
-        buf = iov->iov[0].iov_base;
+    buf = g_try_malloc(nb_sectors * BDRV_SECTOR_SIZE);
+    if (nb_sectors && buf == NULL) {
+        return -ENOMEM;
    }

-    qemu_mutex_lock(&client->mutex);
+    qemu_iovec_to_buf(iov, 0, buf, nb_sectors * BDRV_SECTOR_SIZE);
+
    if (nfs_pwrite_async(client->context, client->fh,
-                         offset, bytes, buf,
-                         nfs_co_generic_cb, &task) != 0) {
-        qemu_mutex_unlock(&client->mutex);
-        if (my_buffer) {
-            g_free(buf);
-        }
+                         sector_num * BDRV_SECTOR_SIZE,
+                         nb_sectors * BDRV_SECTOR_SIZE,
+                         buf, nfs_co_generic_cb, &task) != 0) {
+        g_free(buf);
        return -ENOMEM;
    }

-    nfs_set_events(client);
-    qemu_mutex_unlock(&client->mutex);
    while (!task.complete) {
+        nfs_set_events(client);
        qemu_coroutine_yield();
    }

-    if (my_buffer) {
-        g_free(buf);
-    }
+    g_free(buf);

-    if (task.ret != bytes) {
+    if (task.ret != nb_sectors * BDRV_SECTOR_SIZE) {
        return task.ret < 0 ? task.ret : -EIO;
    }

@@ -350,62 +208,30 @@ static int coroutine_fn nfs_co_flush(BlockDriverState *bs)
    NFSClient *client = bs->opaque;
    NFSRPC task;

-    nfs_co_init_task(bs, &task);
+    nfs_co_init_task(client, &task);

-    qemu_mutex_lock(&client->mutex);
    if (nfs_fsync_async(client->context, client->fh, nfs_co_generic_cb,
                        &task) != 0) {
-        qemu_mutex_unlock(&client->mutex);
        return -ENOMEM;
    }

-    nfs_set_events(client);
-    qemu_mutex_unlock(&client->mutex);
    while (!task.complete) {
+        nfs_set_events(client);
        qemu_coroutine_yield();
    }

    return task.ret;
 }

+/* TODO Convert to fine grained options */
 static QemuOptsList runtime_opts = {
    .name = "nfs",
    .head = QTAILQ_HEAD_INITIALIZER(runtime_opts.head),
    .desc = {
        {
-            .name = "path",
+            .name = "filename",
            .type = QEMU_OPT_STRING,
-            .help = "Path of the image on the host",
-        },
-        {
-            .name = "user",
-            .type = QEMU_OPT_NUMBER,
-            .help = "UID value to use when talking to the server",
-        },
-        {
-            .name = "group",
-            .type = QEMU_OPT_NUMBER,
-            .help = "GID value to use when talking to the server",
-        },
-        {
-            .name = "tcp-syn-count",
-            .type = QEMU_OPT_NUMBER,
-            .help = "Number of SYNs to send during the session establish",
-        },
-        {
-            .name = "readahead-size",
-            .type = QEMU_OPT_NUMBER,
-            .help = "Set the readahead size in bytes",
-        },
-        {
-            .name = "page-cache-size",
-            .type = QEMU_OPT_NUMBER,
-            .help = "Set the pagecache size in bytes",
-        },
-        {
-            .name = "debug",
-            .type = QEMU_OPT_NUMBER,
-            .help = "Set the NFS debug level (max 2)",
+            .help = "URL to the NFS file",
        },
        { /* end of list */ }
    },
@@ -415,8 +241,9 @@ static void nfs_detach_aio_context(BlockDriverState *bs)
 {
    NFSClient *client = bs->opaque;

-    aio_set_fd_handler(client->aio_context, nfs_get_fd(client->context),
-                       false, NULL, NULL, NULL, NULL);
+    aio_set_fd_handler(client->aio_context,
+                       nfs_get_fd(client->context),
+                       NULL, NULL, NULL);
    client->events = 0;
 }

@@ -434,17 +261,13 @@ static void nfs_client_close(NFSClient *client)
    if (client->context) {
        if (client->fh) {
            nfs_close(client->context, client->fh);
-            client->fh = NULL;
        }
-        aio_set_fd_handler(client->aio_context, nfs_get_fd(client->context),
-                           false, NULL, NULL, NULL, NULL);
+        aio_set_fd_handler(client->aio_context,
+                           nfs_get_fd(client->context),
+                           NULL, NULL, NULL);
        nfs_destroy_context(client->context);
-        client->context = NULL;
    }
-    g_free(client->path);
-    qemu_mutex_destroy(&client->mutex);
-    qapi_free_NFSServer(client->server);
-    client->server = NULL;
+    memset(client, 0, sizeof(NFSClient));
 }

 static void nfs_file_close(BlockDriverState *bs)
@@ -453,73 +276,25 @@ static void nfs_file_close(BlockDriverState *bs)
    nfs_client_close(client);
 }

-static NFSServer *nfs_config(QDict *options, Error **errp)
+static int64_t nfs_client_open(NFSClient *client, const char *filename,
+                               int flags, Error **errp)
 {
-    NFSServer *server = NULL;
-    QDict *addr = NULL;
-    QObject *crumpled_addr = NULL;
-    Visitor *iv = NULL;
-    Error *local_error = NULL;
-
-    qdict_extract_subqdict(options, &addr, "server.");
-    if (!qdict_size(addr)) {
-        error_setg(errp, "NFS server address missing");
-        goto out;
-    }
-
-    crumpled_addr = qdict_crumple(addr, errp);
-    if (!crumpled_addr) {
-        goto out;
-    }
-
-    /*
-     * Caution: this works only because all scalar members of
-     * NFSServer are QString in @crumpled_addr.  The visitor expects
-     * @crumpled_addr to be typed according to the QAPI schema.  It
-     * is when @options come from -blockdev or blockdev_add.  But when
-     * they come from -drive, they're all QString.
-     */
-    iv = qobject_input_visitor_new(crumpled_addr);
-    visit_type_NFSServer(iv, NULL, &server, &local_error);
-    if (local_error) {
-        error_propagate(errp, local_error);
-        goto out;
-    }
-
-out:
-    QDECREF(addr);
-    qobject_decref(crumpled_addr);
-    visit_free(iv);
-    return server;
-}
-
-
-static int64_t nfs_client_open(NFSClient *client, QDict *options,
-                               int flags, Error **errp, int open_flags)
-{
-    int ret = -EINVAL;
-    QemuOpts *opts = NULL;
-    Error *local_err = NULL;
+    int ret = -EINVAL, i;
    struct stat st;
+    URI *uri;
+    QueryParams *qp = NULL;
    char *file = NULL, *strp = NULL;

-    qemu_mutex_init(&client->mutex);
-    opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort);
-    qemu_opts_absorb_qdict(opts, options, &local_err);
-    if (local_err) {
-        error_propagate(errp, local_err);
-        ret = -EINVAL;
+    uri = uri_parse(filename);
+    if (!uri) {
+        error_setg(errp, "Invalid URL specified");
        goto fail;
    }
-
-    client->path = g_strdup(qemu_opt_get(opts, "path"));
-    if (!client->path) {
-        ret = -EINVAL;
-        error_setg(errp, "No path was specified");
+    if (!uri->server) {
+        error_setg(errp, "Invalid URL specified");
        goto fail;
    }
-
-    strp = strrchr(client->path, '/');
+    strp = strrchr(uri->path, '/');
    if (strp == NULL) {
        error_setg(errp, "Invalid URL specified");
        goto fail;
@@ -527,89 +302,48 @@ static int64_t nfs_client_open(NFSClient *client, QDict *options,
    file = g_strdup(strp);
    *strp = 0;

-    /* Pop the config into our state object, Exit if invalid */
-    client->server = nfs_config(options, errp);
-    if (!client->server) {
-        ret = -EINVAL;
-        goto fail;
-    }
-
    client->context = nfs_init_context();
    if (client->context == NULL) {
        error_setg(errp, "Failed to init NFS context");
        goto fail;
    }

-    if (qemu_opt_get(opts, "user")) {
-        client->uid = qemu_opt_get_number(opts, "user", 0);
-        nfs_set_uid(client->context, client->uid);
-    }
-
-    if (qemu_opt_get(opts, "group")) {
-        client->gid = qemu_opt_get_number(opts, "group", 0);
-        nfs_set_gid(client->context, client->gid);
-    }
-
-    if (qemu_opt_get(opts, "tcp-syn-count")) {
-        client->tcp_syncnt = qemu_opt_get_number(opts, "tcp-syn-count", 0);
-        nfs_set_tcp_syncnt(client->context, client->tcp_syncnt);
-    }
-
+    qp = query_params_parse(uri->query);
+    for (i = 0; i < qp->n; i++) {
+        unsigned long long val;
+        if (!qp->p[i].value) {
+            error_setg(errp, "Value for NFS parameter expected: %s",
+                       qp->p[i].name);
+            goto fail;
+        }
+        if (parse_uint_full(qp->p[i].value, &val, 0)) {
+            error_setg(errp, "Illegal value for NFS parameter: %s",
+                       qp->p[i].name);
+            goto fail;
+        }
+        if (!strcmp(qp->p[i].name, "uid")) {
+            nfs_set_uid(client->context, val);
+        } else if (!strcmp(qp->p[i].name, "gid")) {
+            nfs_set_gid(client->context, val);
+        } else if (!strcmp(qp->p[i].name, "tcp-syncnt")) {
+            nfs_set_tcp_syncnt(client->context, val);
 #ifdef LIBNFS_FEATURE_READAHEAD
-    if (qemu_opt_get(opts, "readahead-size")) {
-        if (open_flags & BDRV_O_NOCACHE) {
-            error_setg(errp, "Cannot enable NFS readahead "
-                             "if cache.direct = on");
+        } else if (!strcmp(qp->p[i].name, "readahead")) {
+            if (val > QEMU_NFS_MAX_READAHEAD_SIZE) {
+                error_report("NFS Warning: Truncating NFS readahead"
+                             " size to %d", QEMU_NFS_MAX_READAHEAD_SIZE);
+                val = QEMU_NFS_MAX_READAHEAD_SIZE;
+            }
+            nfs_set_readahead(client->context, val);
+#endif
+        } else {
+            error_setg(errp, "Unknown NFS parameter name: %s",
+                       qp->p[i].name);
            goto fail;
        }
-        client->readahead = qemu_opt_get_number(opts, "readahead-size", 0);
-        if (client->readahead > QEMU_NFS_MAX_READAHEAD_SIZE) {
-            error_report("NFS Warning: Truncating NFS readahead "
-                         "size to %d", QEMU_NFS_MAX_READAHEAD_SIZE);
-            client->readahead = QEMU_NFS_MAX_READAHEAD_SIZE;
-        }
-        nfs_set_readahead(client->context, client->readahead);
-#ifdef LIBNFS_FEATURE_PAGECACHE
-        nfs_set_pagecache_ttl(client->context, 0);
-#endif
-        client->cache_used = true;
    }
-#endif

-#ifdef LIBNFS_FEATURE_PAGECACHE
-    if (qemu_opt_get(opts, "page-cache-size")) {
-        if (open_flags & BDRV_O_NOCACHE) {
-            error_setg(errp, "Cannot enable NFS pagecache "
-                             "if cache.direct = on");
-            goto fail;
-        }
-        client->pagecache = qemu_opt_get_number(opts, "page-cache-size", 0);
-        if (client->pagecache > QEMU_NFS_MAX_PAGECACHE_SIZE) {
-            error_report("NFS Warning: Truncating NFS pagecache "
-                         "size to %d pages", QEMU_NFS_MAX_PAGECACHE_SIZE);
-            client->pagecache = QEMU_NFS_MAX_PAGECACHE_SIZE;
-        }
-        nfs_set_pagecache(client->context, client->pagecache);
-        nfs_set_pagecache_ttl(client->context, 0);
-        client->cache_used = true;
-    }
-#endif
-
-#ifdef LIBNFS_FEATURE_DEBUG
-    if (qemu_opt_get(opts, "debug")) {
-        client->debug = qemu_opt_get_number(opts, "debug", 0);
-        /* limit the maximum debug level to avoid potential flooding
-         * of our log files. */
-        if (client->debug > QEMU_NFS_MAX_DEBUG_LEVEL) {
-            error_report("NFS Warning: Limiting NFS debug level "
-                         "to %d", QEMU_NFS_MAX_DEBUG_LEVEL);
-            client->debug = QEMU_NFS_MAX_DEBUG_LEVEL;
-        }
-        nfs_set_debug(client->context, client->debug);
-    }
-#endif
-
-    ret = nfs_mount(client->context, client->server->host, client->path);
+    ret = nfs_mount(client->context, uri->server, uri->path);
    if (ret < 0) {
        error_setg(errp, "Failed to mount nfs share: %s",
                   nfs_get_error(client->context));
@@ -640,15 +374,15 @@ static int64_t nfs_client_open(NFSClient *client, QDict *options,
    }

    ret = DIV_ROUND_UP(st.st_size, BDRV_SECTOR_SIZE);
-    client->st_blocks = st.st_blocks;
    client->has_zero_init = S_ISREG(st.st_mode);
-    *strp = '/';
    goto out;
-
 fail:
    nfs_client_close(client);
 out:
-    qemu_opts_del(opts);
+    if (qp) {
+        query_params_free(qp);
+    }
+    uri_free(uri);
    g_free(file);
    return ret;
 }
@@ -657,18 +391,28 @@ static int nfs_file_open(BlockDriverState *bs, QDict *options, int flags,
                         Error **errp) {
    NFSClient *client = bs->opaque;
    int64_t ret;
+    QemuOpts *opts;
+    Error *local_err = NULL;

    client->aio_context = bdrv_get_aio_context(bs);

-    ret = nfs_client_open(client, options,
+    opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort);
+    qemu_opts_absorb_qdict(opts, options, &local_err);
+    if (local_err) {
+        error_propagate(errp, local_err);
+        ret = -EINVAL;
+        goto out;
+    }
+    ret = nfs_client_open(client, qemu_opt_get(opts, "filename"),
                          (flags & BDRV_O_RDWR) ? O_RDWR : O_RDONLY,
-                          errp, bs->open_flags);
+                          errp);
    if (ret < 0) {
-        return ret;
+        goto out;
    }
-
    bs->total_sectors = ret;
    ret = 0;
+out:
+    qemu_opts_del(opts);
    return ret;
 }

@@ -690,7 +434,6 @@ static int nfs_file_create(const char *url, QemuOpts *opts, Error **errp)
    int ret = 0;
    int64_t total_size = 0;
    NFSClient *client = g_new0(NFSClient, 1);
-    QDict *options = NULL;

    client->aio_context = qemu_get_aio_context();

@@ -698,20 +441,13 @@ static int nfs_file_create(const char *url, QemuOpts *opts, Error **errp)
    total_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
                          BDRV_SECTOR_SIZE);

-    options = qdict_new();
-    ret = nfs_parse_uri(url, options, errp);
-    if (ret < 0) {
-        goto out;
-    }
-
-    ret = nfs_client_open(client, options, O_CREAT, errp, 0);
+    ret = nfs_client_open(client, url, O_CREAT, errp);
    if (ret < 0) {
        goto out;
    }
    ret = nfs_ftruncate(client->context, client->fh, total_size);
    nfs_client_close(client);
 out:
-    QDECREF(options);
    g_free(client);
    return ret;
 }
@@ -722,43 +458,22 @@ static int nfs_has_zero_init(BlockDriverState *bs)
    return client->has_zero_init;
 }

-/* Called (via nfs_service) with QemuMutex held.  */
-static void
-nfs_get_allocated_file_size_cb(int ret, struct nfs_context *nfs, void *data,
-                               void *private_data)
-{
-    NFSRPC *task = private_data;
-    task->ret = ret;
-    if (task->ret == 0) {
-        memcpy(task->st, data, sizeof(struct stat));
-    }
-    if (task->ret < 0) {
-        error_report("NFS Error: %s", nfs_get_error(nfs));
-    }
-    task->complete = 1;
-    bdrv_wakeup(task->bs);
-}
-
 static int64_t nfs_get_allocated_file_size(BlockDriverState *bs)
 {
    NFSClient *client = bs->opaque;
    NFSRPC task = {0};
    struct stat st;

-    if (bdrv_is_read_only(bs) &&
-        !(bs->open_flags & BDRV_O_NOCACHE)) {
-        return client->st_blocks * 512;
-    }
-
-    task.bs = bs;
    task.st = &st;
-    if (nfs_fstat_async(client->context, client->fh, nfs_get_allocated_file_size_cb,
+    if (nfs_fstat_async(client->context, client->fh, nfs_co_generic_cb,
                        &task) != 0) {
        return -ENOMEM;
    }

-    nfs_set_events(client);
-    BDRV_POLL_WHILE(bs, !task.complete);
+    while (!task.complete) {
+        nfs_set_events(client);
+        aio_poll(client->aio_context, true);
+    }

    return (task.ret < 0 ? task.ret : st.st_blocks * 512);
 }
@@ -769,111 +484,12 @@ static int nfs_file_truncate(BlockDriverState *bs, int64_t offset)
    return nfs_ftruncate(client->context, client->fh, offset);
 }

-/* Note that this will not re-establish a connection with the NFS server
- * - it is effectively a NOP.  */
-static int nfs_reopen_prepare(BDRVReopenState *state,
-                              BlockReopenQueue *queue, Error **errp)
-{
-    NFSClient *client = state->bs->opaque;
-    struct stat st;
-    int ret = 0;
-
-    if (state->flags & BDRV_O_RDWR && bdrv_is_read_only(state->bs)) {
-        error_setg(errp, "Cannot open a read-only mount as read-write");
-        return -EACCES;
-    }
-
-    if ((state->flags & BDRV_O_NOCACHE) && client->cache_used) {
-        error_setg(errp, "Cannot disable cache if libnfs readahead or"
-                         " pagecache is enabled");
-        return -EINVAL;
-    }
-
-    /* Update cache for read-only reopens */
-    if (!(state->flags & BDRV_O_RDWR)) {
-        ret = nfs_fstat(client->context, client->fh, &st);
-        if (ret < 0) {
-            error_setg(errp, "Failed to fstat file: %s",
-                       nfs_get_error(client->context));
-            return ret;
-        }
-        client->st_blocks = st.st_blocks;
-    }
-
-    return 0;
-}
-
-static void nfs_refresh_filename(BlockDriverState *bs, QDict *options)
-{
-    NFSClient *client = bs->opaque;
-    QDict *opts = qdict_new();
-    QObject *server_qdict;
-    Visitor *ov;
-
-    qdict_put_str(opts, "driver", "nfs");
-
-    if (client->uid && !client->gid) {
-        snprintf(bs->exact_filename, sizeof(bs->exact_filename),
-                 "nfs://%s%s?uid=%" PRId64, client->server->host, client->path,
-                 client->uid);
-    } else if (!client->uid && client->gid) {
-        snprintf(bs->exact_filename, sizeof(bs->exact_filename),
-                 "nfs://%s%s?gid=%" PRId64, client->server->host, client->path,
-                 client->gid);
-    } else if (client->uid && client->gid) {
-        snprintf(bs->exact_filename, sizeof(bs->exact_filename),
-                 "nfs://%s%s?uid=%" PRId64 "&gid=%" PRId64,
-                 client->server->host, client->path, client->uid, client->gid);
-    } else {
-        snprintf(bs->exact_filename, sizeof(bs->exact_filename),
-                 "nfs://%s%s", client->server->host, client->path);
-    }
-
-    ov = qobject_output_visitor_new(&server_qdict);
-    visit_type_NFSServer(ov, NULL, &client->server, &error_abort);
-    visit_complete(ov, &server_qdict);
-    qdict_put_obj(opts, "server", server_qdict);
-    qdict_put_str(opts, "path", client->path);
-
-    if (client->uid) {
-        qdict_put_int(opts, "user", client->uid);
-    }
-    if (client->gid) {
-        qdict_put_int(opts, "group", client->gid);
-    }
-    if (client->tcp_syncnt) {
-        qdict_put_int(opts, "tcp-syn-cnt", client->tcp_syncnt);
-    }
-    if (client->readahead) {
-        qdict_put_int(opts, "readahead-size", client->readahead);
-    }
-    if (client->pagecache) {
-        qdict_put_int(opts, "page-cache-size", client->pagecache);
-    }
-    if (client->debug) {
-        qdict_put_int(opts, "debug", client->debug);
-    }
-
-    visit_free(ov);
-    qdict_flatten(opts);
-    bs->full_open_options = opts;
-}
-
-#ifdef LIBNFS_FEATURE_PAGECACHE
-static void nfs_invalidate_cache(BlockDriverState *bs,
-                                 Error **errp)
-{
-    NFSClient *client = bs->opaque;
-    nfs_pagecache_invalidate(client->context, client->fh);
-}
-#endif
-
 static BlockDriver bdrv_nfs = {
    .format_name                    = "nfs",
    .protocol_name                  = "nfs",

    .instance_size                  = sizeof(NFSClient),
-    .bdrv_parse_filename            = nfs_parse_filename,
+    .bdrv_needs_filename            = true,
    .create_opts                    = &nfs_create_opts,

    .bdrv_has_zero_init             = nfs_has_zero_init,
@@ -883,19 +499,13 @@ static BlockDriver bdrv_nfs = {
    .bdrv_file_open                 = nfs_file_open,
    .bdrv_close                     = nfs_file_close,
    .bdrv_create                    = nfs_file_create,
-    .bdrv_reopen_prepare            = nfs_reopen_prepare,

-    .bdrv_co_preadv                 = nfs_co_preadv,
-    .bdrv_co_pwritev                = nfs_co_pwritev,
+    .bdrv_co_readv                  = nfs_co_readv,
+    .bdrv_co_writev                 = nfs_co_writev,
    .bdrv_co_flush_to_disk          = nfs_co_flush,

    .bdrv_detach_aio_context        = nfs_detach_aio_context,
    .bdrv_attach_aio_context        = nfs_attach_aio_context,
-    .bdrv_refresh_filename          = nfs_refresh_filename,
-
-#ifdef LIBNFS_FEATURE_PAGECACHE
-    .bdrv_invalidate_cache          = nfs_invalidate_cache,
-#endif
 };

 static void nfs_block_init(void)
@@ -10,19 +10,13 @@
 * See the COPYING file in the top-level directory.
 */

-#include "qemu/osdep.h"
-#include "qapi/error.h"
-#include "qapi/qmp/qdict.h"
-#include "qapi/qmp/qstring.h"
 #include "block/block_int.h"

 #define NULL_OPT_LATENCY "latency-ns"
-#define NULL_OPT_ZEROES  "read-zeroes"

 typedef struct {
    int64_t length;
    int64_t latency_ns;
-    bool read_zeroes;
 } BDRVNullState;

 static QemuOptsList runtime_opts = {
@@ -45,11 +39,6 @@ static QemuOptsList runtime_opts = {
            .help = "nanoseconds (approximated) to wait "
                    "before completing request",
        },
-        {
-            .name = NULL_OPT_ZEROES,
-            .type = QEMU_OPT_BOOL,
-            .help = "return zeroes when read",
-        },
        { /* end of list */ }
    },
 };
@@ -71,7 +60,6 @@ static int null_file_open(BlockDriverState *bs, QDict *options, int flags,
        error_setg(errp, "latency-ns is invalid");
        ret = -EINVAL;
    }
-    s->read_zeroes = qemu_opt_get_bool(opts, NULL_OPT_ZEROES, false);
    qemu_opts_del(opts);
    return ret;
 }
@@ -101,12 +89,6 @@ static coroutine_fn int null_co_readv(BlockDriverState *bs,
                                      int64_t sector_num, int nb_sectors,
                                      QEMUIOVector *qiov)
 {
-    BDRVNullState *s = bs->opaque;
-
-    if (s->read_zeroes) {
-        qemu_iovec_memset(qiov, 0, 0, nb_sectors * BDRV_SECTOR_SIZE);
-    }
-
    return null_co_common(bs);
 }

@@ -124,6 +106,7 @@ static coroutine_fn int null_co_flush(BlockDriverState *bs)

 typedef struct {
    BlockAIOCB common;
+    QEMUBH *bh;
    QEMUTimer timer;
 } NullAIOCB;

@@ -135,6 +118,7 @@ static void null_bh_cb(void *opaque)
 {
    NullAIOCB *acb = opaque;
    acb->common.cb(acb->common.opaque, 0);
+    qemu_bh_delete(acb->bh);
    qemu_aio_unref(acb);
 }

@@ -162,7 +146,8 @@ static inline BlockAIOCB *null_aio_common(BlockDriverState *bs,
        timer_mod_ns(&acb->timer,
                     qemu_clock_get_ns(QEMU_CLOCK_REALTIME) + s->latency_ns);
    } else {
-        aio_bh_schedule_oneshot(bdrv_get_aio_context(bs), null_bh_cb, acb);
+        acb->bh = aio_bh_new(bdrv_get_aio_context(bs), null_bh_cb, acb);
+        qemu_bh_schedule(acb->bh);
    }
    return &acb->common;
 }
@@ -173,12 +158,6 @@ static BlockAIOCB *null_aio_readv(BlockDriverState *bs,
                                  BlockCompletionFunc *cb,
                                  void *opaque)
 {
-    BDRVNullState *s = bs->opaque;
-
-    if (s->read_zeroes) {
-        qemu_iovec_memset(qiov, 0, 0, nb_sectors * BDRV_SECTOR_SIZE);
-    }
-
    return null_aio_common(bs, cb, opaque);
 }

@@ -204,38 +183,6 @@ static int null_reopen_prepare(BDRVReopenState *reopen_state,
    return 0;
 }

-static int64_t coroutine_fn null_co_get_block_status(BlockDriverState *bs,
-                                                     int64_t sector_num,
-                                                     int nb_sectors, int *pnum,
-                                                     BlockDriverState **file)
-{
-    BDRVNullState *s = bs->opaque;
-    off_t start = sector_num * BDRV_SECTOR_SIZE;
-
-    *pnum = nb_sectors;
-    *file = bs;
-
-    if (s->read_zeroes) {
-        return BDRV_BLOCK_OFFSET_VALID | start | BDRV_BLOCK_ZERO;
-    } else {
-        return BDRV_BLOCK_OFFSET_VALID | start;
-    }
-}
-
-static void null_refresh_filename(BlockDriverState *bs, QDict *opts)
-{
-    QINCREF(opts);
-    qdict_del(opts, "filename");
-
-    if (!qdict_size(opts)) {
-        snprintf(bs->exact_filename, sizeof(bs->exact_filename), "%s://",
-                 bs->drv->format_name);
-    }
-
-    qdict_put_str(opts, "driver", bs->drv->format_name);
-    bs->full_open_options = opts;
-}
-
 static BlockDriver bdrv_null_co = {
    .format_name            = "null-co",
    .protocol_name          = "null-co",
@@ -249,10 +196,6 @@ static BlockDriver bdrv_null_co = {
    .bdrv_co_writev         = null_co_writev,
    .bdrv_co_flush_to_disk  = null_co_flush,
    .bdrv_reopen_prepare    = null_reopen_prepare,
-
-    .bdrv_co_get_block_status   = null_co_get_block_status,
-
-    .bdrv_refresh_filename  = null_refresh_filename,
 };

 static BlockDriver bdrv_null_aio = {
@@ -268,10 +211,6 @@ static BlockDriver bdrv_null_aio = {
    .bdrv_aio_writev        = null_aio_writev,
    .bdrv_aio_flush         = null_aio_flush,
    .bdrv_reopen_prepare    = null_reopen_prepare,
-
-    .bdrv_co_get_block_status   = null_co_get_block_status,
-
-    .bdrv_refresh_filename  = null_refresh_filename,
 };

 static void bdrv_null_init(void)
@@ -27,13 +27,9 @@
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
-#include "qemu/osdep.h"
-#include "qapi/error.h"
 #include "qemu-common.h"
 #include "block/block_int.h"
-#include "sysemu/block-backend.h"
 #include "qemu/module.h"
-#include "qemu/bswap.h"
 #include "qemu/bitmap.h"
 #include "qapi/util.h"

@@ -43,7 +39,6 @@
 #define HEADER_MAGIC2 "WithouFreSpacExt"
 #define HEADER_VERSION 2
 #define HEADER_INUSE_MAGIC  (0x746F6E59)
-#define MAX_PARALLELS_IMAGE_FACTOR (1ull << 32)

 #define DEFAULT_CLUSTER_SIZE 1048576        /* 1 MiB */

@@ -66,7 +61,7 @@ typedef struct ParallelsHeader {
 typedef enum ParallelsPreallocMode {
    PRL_PREALLOC_MODE_FALLOCATE = 0,
    PRL_PREALLOC_MODE_TRUNCATE = 1,
-    PRL_PREALLOC_MODE__MAX = 2,
+    PRL_PREALLOC_MODE_MAX = 2,
 } ParallelsPreallocMode;

 static const char *prealloc_mode_lookup[] = {
@@ -114,7 +109,7 @@ static QemuOptsList parallels_runtime_opts = {
            .name = PARALLELS_OPT_PREALLOC_SIZE,
            .type = QEMU_OPT_SIZE,
            .help = "Preallocation size on image expansion",
-            .def_value_str = "128M",
+            .def_value_str = "128MiB",
        },
        {
            .name = PARALLELS_OPT_PREALLOC_MODE,
@@ -192,7 +187,8 @@ static int64_t allocate_clusters(BlockDriverState *bs, int64_t sector_num,
                                 int nb_sectors, int *pnum)
 {
    BDRVParallelsState *s = bs->opaque;
-    int64_t pos, space, idx, to_allocate, i;
+    uint32_t idx, to_allocate, i;
+    int64_t pos, space;

    pos = block_status(s, sector_num, nb_sectors, pnum);
    if (pos > 0) {
@@ -200,31 +196,20 @@ static int64_t allocate_clusters(BlockDriverState *bs, int64_t sector_num,
    }

    idx = sector_num / s->tracks;
-    to_allocate = DIV_ROUND_UP(sector_num + *pnum, s->tracks) - idx;
-
-    /* This function is called only by parallels_co_writev(), which will never
-     * pass a sector_num at or beyond the end of the image (because the block
-     * layer never passes such a sector_num to that function). Therefore, idx
-     * is always below s->bat_size.
-     * block_status() will limit *pnum so that sector_num + *pnum will not
-     * exceed the image end. Therefore, idx + to_allocate cannot exceed
-     * s->bat_size.
-     * Note that s->bat_size is an unsigned int, therefore idx + to_allocate
-     * will always fit into a uint32_t. */
-    assert(idx < s->bat_size && idx + to_allocate <= s->bat_size);
+    if (idx >= s->bat_size) {
+        return -EINVAL;
+    }

+    to_allocate = (sector_num + *pnum + s->tracks - 1) / s->tracks - idx;
    space = to_allocate * s->tracks;
-    if (s->data_end + space > bdrv_getlength(bs->file->bs) >> BDRV_SECTOR_BITS) {
+    if (s->data_end + space > bdrv_getlength(bs->file) >> BDRV_SECTOR_BITS) {
        int ret;
        space += s->prealloc_size;
        if (s->prealloc_mode == PRL_PREALLOC_MODE_FALLOCATE) {
-            ret = bdrv_pwrite_zeroes(bs->file,
-                                     s->data_end << BDRV_SECTOR_BITS,
-                                     space << BDRV_SECTOR_BITS, 0);
+            ret = bdrv_write_zeroes(bs->file, s->data_end, space, 0);
        } else {
            ret = bdrv_truncate(bs->file,
-                                (s->data_end + space) << BDRV_SECTOR_BITS,
-                                NULL);
+                                (s->data_end + space) << BDRV_SECTOR_BITS);
        }
        if (ret < 0) {
            return ret;
@@ -235,7 +220,7 @@ static int64_t allocate_clusters(BlockDriverState *bs, int64_t sector_num,
        s->bat_bitmap[idx + i] = cpu_to_le32(s->data_end / s->off_multiplier);
        s->data_end += s->tracks;
        bitmap_set(s->bat_dirty_bmap,
-                   bat_entry_off(idx + i) / s->bat_dirty_block, 1);
+                   bat_entry_off(idx) / s->bat_dirty_block, 1);
    }

    return bat2sect(s, idx) + sector_num % s->tracks;
@@ -259,8 +244,7 @@ static coroutine_fn int parallels_co_flush_to_os(BlockDriverState *bs)
        if (off + to_write > s->header_size) {
            to_write = s->header_size - off;
        }
-        ret = bdrv_pwrite(bs->file, off, (uint8_t *)s->header + off,
-                          to_write);
+        ret = bdrv_pwrite(bs->file, off, (uint8_t *)s->header + off, to_write);
        if (ret < 0) {
            qemu_co_mutex_unlock(&s->lock);
            return ret;
@@ -275,7 +259,7 @@ static coroutine_fn int parallels_co_flush_to_os(BlockDriverState *bs)


 static int64_t coroutine_fn parallels_co_get_block_status(BlockDriverState *bs,
-        int64_t sector_num, int nb_sectors, int *pnum, BlockDriverState **file)
+        int64_t sector_num, int nb_sectors, int *pnum)
 {
    BDRVParallelsState *s = bs->opaque;
    int64_t offset;
@@ -288,7 +272,6 @@ static int64_t coroutine_fn parallels_co_get_block_status(BlockDriverState *bs,
        return 0;
    }

-    *file = bs->file->bs;
    return (offset << BDRV_SECTOR_BITS) |
        BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID;
 }
@@ -386,7 +369,7 @@ static int parallels_check(BlockDriverState *bs, BdrvCheckResult *res,
    bool flush_bat = false;
    int cluster_size = s->tracks << BDRV_SECTOR_BITS;

-    size = bdrv_getlength(bs->file->bs);
+    size = bdrv_getlength(bs->file);
    if (size < 0) {
        res->check_errors++;
        return size;
@@ -457,10 +440,8 @@ static int parallels_check(BlockDriverState *bs, BdrvCheckResult *res,
                size - res->image_end_offset);
        res->leaks += count;
        if (fix & BDRV_FIX_LEAKS) {
-            Error *local_err = NULL;
-            ret = bdrv_truncate(bs->file, res->image_end_offset, &local_err);
+            ret = bdrv_truncate(bs->file, res->image_end_offset);
            if (ret < 0) {
-                error_report_err(local_err);
                res->check_errors++;
                return ret;
            }
@@ -477,7 +458,7 @@ static int parallels_create(const char *filename, QemuOpts *opts, Error **errp)
    int64_t total_size, cl_size;
    uint8_t tmp[BDRV_SECTOR_SIZE];
    Error *local_err = NULL;
-    BlockBackend *file;
+    BlockDriverState *file;
    uint32_t bat_entries, bat_sectors;
    ParallelsHeader header;
    int ret;
@@ -486,10 +467,6 @@ static int parallels_create(const char *filename, QemuOpts *opts, Error **errp)
                          BDRV_SECTOR_SIZE);
    cl_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_CLUSTER_SIZE,
                          DEFAULT_CLUSTER_SIZE), BDRV_SECTOR_SIZE);
-    if (total_size >= MAX_PARALLELS_IMAGE_FACTOR * cl_size) {
-        error_propagate(errp, local_err);
-        return -E2BIG;
-    }

    ret = bdrv_create_file(filename, opts, &local_err);
    if (ret < 0) {
@@ -497,17 +474,14 @@ static int parallels_create(const char *filename, QemuOpts *opts, Error **errp)
        return ret;
    }

-    file = blk_new_open(filename, NULL, NULL,
-                        BDRV_O_RDWR | BDRV_O_RESIZE | BDRV_O_PROTOCOL,
-                        &local_err);
-    if (file == NULL) {
+    file = NULL;
+    ret = bdrv_open(&file, filename, NULL, NULL,
+                    BDRV_O_RDWR | BDRV_O_PROTOCOL, NULL, &local_err);
+    if (ret < 0) {
        error_propagate(errp, local_err);
-        return -EIO;
+        return ret;
    }
-
-    blk_set_allow_write_beyond_eof(file, true);
-
-    ret = blk_truncate(file, 0, errp);
+    ret = bdrv_truncate(file, 0);
    if (ret < 0) {
        goto exit;
    }
@@ -531,19 +505,18 @@ static int parallels_create(const char *filename, QemuOpts *opts, Error **errp)
    memset(tmp, 0, sizeof(tmp));
    memcpy(tmp, &header, sizeof(header));

-    ret = blk_pwrite(file, 0, tmp, BDRV_SECTOR_SIZE, 0);
+    ret = bdrv_pwrite(file, 0, tmp, BDRV_SECTOR_SIZE);
    if (ret < 0) {
        goto exit;
    }
-    ret = blk_pwrite_zeroes(file, BDRV_SECTOR_SIZE,
-                            (bat_sectors - 1) << BDRV_SECTOR_BITS, 0);
+    ret = bdrv_write_zeroes(file, 1, bat_sectors - 1, 0);
    if (ret < 0) {
        goto exit;
    }
    ret = 0;

 done:
-    blk_unref(file);
+    bdrv_unref(file);
    return ret;

 exit:
@@ -573,8 +546,7 @@ static int parallels_probe(const uint8_t *buf, int buf_size,
 static int parallels_update_header(BlockDriverState *bs)
 {
    BDRVParallelsState *s = bs->opaque;
-    unsigned size = MAX(bdrv_opt_mem_align(bs->file->bs),
-                        sizeof(ParallelsHeader));
+    unsigned size = MAX(bdrv_opt_mem_align(bs->file), sizeof(ParallelsHeader));

    if (size > s->header_size) {
        size = s->header_size;
@@ -592,12 +564,6 @@ static int parallels_open(BlockDriverState *bs, QDict *options, int flags,
    Error *local_err = NULL;
    char *buf;

-    bs->file = bdrv_open_child(NULL, options, "file", bs, &child_file,
-                               false, errp);
-    if (!bs->file) {
-        return -EINVAL;
-    }
-
    ret = bdrv_pread(bs->file, 0, &ph, sizeof(ph));
    if (ret < 0) {
        goto fail;
@@ -637,8 +603,8 @@ static int parallels_open(BlockDriverState *bs, QDict *options, int flags,
    }

    size = bat_entry_off(s->bat_size);
-    s->header_size = ROUND_UP(size, bdrv_opt_mem_align(bs->file->bs));
-    s->header = qemu_try_blockalign(bs->file->bs, s->header_size);
+    s->header_size = ROUND_UP(size, bdrv_opt_mem_align(bs->file));
+    s->header = qemu_try_blockalign(bs->file, s->header_size);
    if (s->header == NULL) {
        ret = -ENOMEM;
        goto fail;
@@ -692,14 +658,13 @@ static int parallels_open(BlockDriverState *bs, QDict *options, int flags,
    s->prealloc_size = MAX(s->tracks, s->prealloc_size >> BDRV_SECTOR_BITS);
    buf = qemu_opt_get_del(opts, PARALLELS_OPT_PREALLOC_MODE);
    s->prealloc_mode = qapi_enum_parse(prealloc_mode_lookup, buf,
-            PRL_PREALLOC_MODE__MAX, PRL_PREALLOC_MODE_FALLOCATE, &local_err);
+            PRL_PREALLOC_MODE_MAX, PRL_PREALLOC_MODE_FALLOCATE, &local_err);
    g_free(buf);
    if (local_err != NULL) {
        goto fail_options;
    }
-
-    if (!(flags & BDRV_O_RESIZE) || !bdrv_has_zero_init(bs->file->bs) ||
-            bdrv_truncate(bs->file, bdrv_getlength(bs->file->bs), NULL) != 0) {
+    if (!bdrv_has_zero_init(bs->file) ||
+            bdrv_truncate(bs->file, bdrv_getlength(bs->file)) != 0) {
        s->prealloc_mode = PRL_PREALLOC_MODE_FALLOCATE;
    }

@@ -742,7 +707,7 @@ static void parallels_close(BlockDriverState *bs)
    }

    if (bs->open_flags & BDRV_O_RDWR) {
-        bdrv_truncate(bs->file, s->data_end << BDRV_SECTOR_BITS, NULL);
+        bdrv_truncate(bs->file, s->data_end << BDRV_SECTOR_BITS);
    }

    g_free(s->bat_dirty_bmap);
@@ -774,7 +739,6 @@ static BlockDriver bdrv_parallels = {
    .bdrv_probe		= parallels_probe,
    .bdrv_open		= parallels_open,
    .bdrv_close		= parallels_close,
-    .bdrv_child_perm          = bdrv_format_default_perms,
    .bdrv_co_get_block_status = parallels_co_get_block_status,
    .bdrv_has_zero_init       = bdrv_has_zero_init_1,
    .bdrv_co_flush_to_os      = parallels_co_flush_to_os,
@@ -22,20 +22,17 @@
 * THE SOFTWARE.
 */

-#include "qemu/osdep.h"
 #include "block/qapi.h"
 #include "block/block_int.h"
 #include "block/throttle-groups.h"
 #include "block/write-threshold.h"
 #include "qmp-commands.h"
 #include "qapi-visit.h"
-#include "qapi/qobject-output-visitor.h"
+#include "qapi/qmp-output-visitor.h"
 #include "qapi/qmp/types.h"
 #include "sysemu/block-backend.h"
-#include "qemu/cutils.h"

-BlockDeviceInfo *bdrv_block_device_info(BlockBackend *blk,
-                                        BlockDriverState *bs, Error **errp)
+BlockDeviceInfo *bdrv_block_device_info(BlockDriverState *bs, Error **errp)
 {
    ImageInfo **p_image_info;
    BlockDriverState *bs0;
@@ -49,7 +46,7 @@ BlockDeviceInfo *bdrv_block_device_info(BlockBackend *blk,

    info->cache = g_new(BlockdevCacheInfo, 1);
    *info->cache = (BlockdevCacheInfo) {
-        .writeback      = blk ? blk_enable_write_cache(blk) : true,
+        .writeback      = bdrv_enable_write_cache(bs),
        .direct         = !!(bs->open_flags & BDRV_O_NOCACHE),
        .no_flush       = !!(bs->open_flags & BDRV_O_NO_FLUSH),
    };
@@ -64,12 +61,13 @@ BlockDeviceInfo *bdrv_block_device_info(BlockBackend *blk,
        info->backing_file = g_strdup(bs->backing_file);
    }

+    info->backing_file_depth = bdrv_get_backing_file_depth(bs);
    info->detect_zeroes = bs->detect_zeroes;

-    if (blk && blk_get_public(blk)->throttle_state) {
+    if (bs->io_limits_enabled) {
        ThrottleConfig cfg;

-        throttle_group_get_config(blk, &cfg);
+        throttle_group_get_config(bs, &cfg);

        info->bps     = cfg.buckets[THROTTLE_BPS_TOTAL].avg;
        info->bps_rd  = cfg.buckets[THROTTLE_BPS_READ].avg;
@@ -93,38 +91,17 @@ BlockDeviceInfo *bdrv_block_device_info(BlockBackend *blk,
        info->has_iops_wr_max = cfg.buckets[THROTTLE_OPS_WRITE].max;
        info->iops_wr_max     = cfg.buckets[THROTTLE_OPS_WRITE].max;

-        info->has_bps_max_length     = info->has_bps_max;
-        info->bps_max_length         =
-            cfg.buckets[THROTTLE_BPS_TOTAL].burst_length;
-        info->has_bps_rd_max_length  = info->has_bps_rd_max;
-        info->bps_rd_max_length      =
-            cfg.buckets[THROTTLE_BPS_READ].burst_length;
-        info->has_bps_wr_max_length  = info->has_bps_wr_max;
-        info->bps_wr_max_length      =
-            cfg.buckets[THROTTLE_BPS_WRITE].burst_length;
-
-        info->has_iops_max_length    = info->has_iops_max;
-        info->iops_max_length        =
-            cfg.buckets[THROTTLE_OPS_TOTAL].burst_length;
-        info->has_iops_rd_max_length = info->has_iops_rd_max;
-        info->iops_rd_max_length     =
-            cfg.buckets[THROTTLE_OPS_READ].burst_length;
-        info->has_iops_wr_max_length = info->has_iops_wr_max;
-        info->iops_wr_max_length     =
-            cfg.buckets[THROTTLE_OPS_WRITE].burst_length;
-
        info->has_iops_size = cfg.op_size;
        info->iops_size = cfg.op_size;

        info->has_group = true;
-        info->group = g_strdup(throttle_group_get_name(blk));
+        info->group = g_strdup(throttle_group_get_name(bs));
    }

    info->write_threshold = bdrv_write_threshold_get(bs);

    bs0 = bs;
    p_image_info = &info->image;
-    info->backing_file_depth = 0;
    while (1) {
        Error *local_err = NULL;
        bdrv_query_image_info(bs0, p_image_info, &local_err);
@@ -133,21 +110,13 @@ BlockDeviceInfo *bdrv_block_device_info(BlockBackend *blk,
            qapi_free_BlockDeviceInfo(info);
            return NULL;
        }
-
-        if (bs0->drv && bs0->backing) {
-            info->backing_file_depth++;
-            bs0 = bs0->backing->bs;
+        if (bs0->drv && bs0->backing_hd) {
+            bs0 = bs0->backing_hd;
            (*p_image_info)->has_backing_image = true;
            p_image_info = &((*p_image_info)->backing_image);
        } else {
            break;
        }
-
-        /* Skip automatically inserted nodes that the user isn't aware of for
-         * query-block (blk != NULL), but not for query-named-block-nodes */
-        while (blk && bs0 && bs0->drv && bs0->implicit) {
-            bs0 = backing_bs(bs0);
-        }
    }

    return info;
@@ -241,13 +210,11 @@ void bdrv_query_image_info(BlockDriverState *bs,
    Error *err = NULL;
    ImageInfo *info;

-    aio_context_acquire(bdrv_get_aio_context(bs));
-
    size = bdrv_getlength(bs);
    if (size < 0) {
-        error_setg_errno(errp, -size, "Can't get image size '%s'",
-                         bs->exact_filename);
-        goto out;
+        error_setg_errno(errp, -size, "Can't get size of device '%s'",
+                         bdrv_get_device_name(bs));
+        return;
    }

    info = g_new0(ImageInfo, 1);
@@ -278,18 +245,15 @@ void bdrv_query_image_info(BlockDriverState *bs,
        info->has_backing_filename = true;
        bdrv_get_full_backing_filename(bs, backing_filename2, PATH_MAX, &err);
        if (err) {
-            /* Can't reconstruct the full backing filename, so we must omit
-             * this field and apply a Best Effort to this query. */
+            error_propagate(errp, err);
+            qapi_free_ImageInfo(info);
            g_free(backing_filename2);
-            backing_filename2 = NULL;
-            error_free(err);
-            err = NULL;
+            return;
        }

-        /* Always report the full_backing_filename if present, even if it's the
-         * same as backing_filename. That they are same is useful info. */
-        if (backing_filename2) {
-            info->full_backing_filename = g_strdup(backing_filename2);
+        if (strcmp(backing_filename, backing_filename2) != 0) {
+            info->full_backing_filename =
+                        g_strdup(backing_filename2);
            info->has_full_backing_filename = true;
        }

@@ -315,13 +279,10 @@ void bdrv_query_image_info(BlockDriverState *bs,
    default:
        error_propagate(errp, err);
        qapi_free_ImageInfo(info);
-        goto out;
+        return;
    }

    *p_info = info;
-
-out:
-    aio_context_release(bdrv_get_aio_context(bs));
 }

 /* @p_info will be set only on success. */
@@ -330,35 +291,29 @@ static void bdrv_query_info(BlockBackend *blk, BlockInfo **p_info,
 {
    BlockInfo *info = g_malloc0(sizeof(*info));
    BlockDriverState *bs = blk_bs(blk);
-
-    /* Skip automatically inserted nodes that the user isn't aware of */
-    while (bs && bs->drv && bs->implicit) {
-        bs = backing_bs(bs);
-    }
-
    info->device = g_strdup(blk_name(blk));
    info->type = g_strdup("unknown");
    info->locked = blk_dev_is_medium_locked(blk);
    info->removable = blk_dev_has_removable_media(blk);

-    if (blk_dev_has_tray(blk)) {
+    if (blk_dev_has_removable_media(blk)) {
        info->has_tray_open = true;
        info->tray_open = blk_dev_is_tray_open(blk);
    }

-    if (blk_iostatus_is_enabled(blk)) {
+    if (bdrv_iostatus_is_enabled(bs)) {
        info->has_io_status = true;
-        info->io_status = blk_iostatus(blk);
+        info->io_status = bs->iostatus;
    }

-    if (bs && !QLIST_EMPTY(&bs->dirty_bitmaps)) {
+    if (!QLIST_EMPTY(&bs->dirty_bitmaps)) {
        info->has_dirty_bitmaps = true;
        info->dirty_bitmaps = bdrv_query_dirty_bitmaps(bs);
    }

-    if (bs && bs->drv) {
+    if (bs->drv) {
        info->has_inserted = true;
-        info->inserted = bdrv_block_device_info(blk, bs, errp);
+        info->inserted = bdrv_block_device_info(bs, errp);
        if (info->inserted == NULL) {
            goto err;
        }
@@ -371,91 +326,16 @@ static void bdrv_query_info(BlockBackend *blk, BlockInfo **p_info,
    qapi_free_BlockInfo(info);
 }

-static void bdrv_query_blk_stats(BlockDeviceStats *ds, BlockBackend *blk)
+static BlockStats *bdrv_query_stats(const BlockDriverState *bs,
+                                    bool query_backing)
 {
-    BlockAcctStats *stats = blk_get_stats(blk);
-    BlockAcctTimedStats *ts = NULL;
-
-    ds->rd_bytes = stats->nr_bytes[BLOCK_ACCT_READ];
-    ds->wr_bytes = stats->nr_bytes[BLOCK_ACCT_WRITE];
-    ds->rd_operations = stats->nr_ops[BLOCK_ACCT_READ];
-    ds->wr_operations = stats->nr_ops[BLOCK_ACCT_WRITE];
-
-    ds->failed_rd_operations = stats->failed_ops[BLOCK_ACCT_READ];
-    ds->failed_wr_operations = stats->failed_ops[BLOCK_ACCT_WRITE];
-    ds->failed_flush_operations = stats->failed_ops[BLOCK_ACCT_FLUSH];
-
-    ds->invalid_rd_operations = stats->invalid_ops[BLOCK_ACCT_READ];
-    ds->invalid_wr_operations = stats->invalid_ops[BLOCK_ACCT_WRITE];
-    ds->invalid_flush_operations =
-        stats->invalid_ops[BLOCK_ACCT_FLUSH];
-
-    ds->rd_merged = stats->merged[BLOCK_ACCT_READ];
-    ds->wr_merged = stats->merged[BLOCK_ACCT_WRITE];
-    ds->flush_operations = stats->nr_ops[BLOCK_ACCT_FLUSH];
-    ds->wr_total_time_ns = stats->total_time_ns[BLOCK_ACCT_WRITE];
-    ds->rd_total_time_ns = stats->total_time_ns[BLOCK_ACCT_READ];
-    ds->flush_total_time_ns = stats->total_time_ns[BLOCK_ACCT_FLUSH];
-
-    ds->has_idle_time_ns = stats->last_access_time_ns > 0;
-    if (ds->has_idle_time_ns) {
-        ds->idle_time_ns = block_acct_idle_time_ns(stats);
-    }
-
-    ds->account_invalid = stats->account_invalid;
-    ds->account_failed = stats->account_failed;
-
-    while ((ts = block_acct_interval_next(stats, ts))) {
-        BlockDeviceTimedStatsList *timed_stats =
-            g_malloc0(sizeof(*timed_stats));
-        BlockDeviceTimedStats *dev_stats = g_malloc0(sizeof(*dev_stats));
-        timed_stats->next = ds->timed_stats;
-        timed_stats->value = dev_stats;
-        ds->timed_stats = timed_stats;
-
-        TimedAverage *rd = &ts->latency[BLOCK_ACCT_READ];
-        TimedAverage *wr = &ts->latency[BLOCK_ACCT_WRITE];
-        TimedAverage *fl = &ts->latency[BLOCK_ACCT_FLUSH];
-
-        dev_stats->interval_length = ts->interval_length;
-
-        dev_stats->min_rd_latency_ns = timed_average_min(rd);
-        dev_stats->max_rd_latency_ns = timed_average_max(rd);
-        dev_stats->avg_rd_latency_ns = timed_average_avg(rd);
-
-        dev_stats->min_wr_latency_ns = timed_average_min(wr);
-        dev_stats->max_wr_latency_ns = timed_average_max(wr);
-        dev_stats->avg_wr_latency_ns = timed_average_avg(wr);
-
-        dev_stats->min_flush_latency_ns = timed_average_min(fl);
-        dev_stats->max_flush_latency_ns = timed_average_max(fl);
-        dev_stats->avg_flush_latency_ns = timed_average_avg(fl);
-
-        dev_stats->avg_rd_queue_depth =
-            block_acct_queue_depth(ts, BLOCK_ACCT_READ);
-        dev_stats->avg_wr_queue_depth =
-            block_acct_queue_depth(ts, BLOCK_ACCT_WRITE);
-    }
-}
-
-static BlockStats *bdrv_query_bds_stats(BlockDriverState *bs,
-                                        bool blk_level)
-{
-    BlockStats *s = NULL;
+    BlockStats *s;

    s = g_malloc0(sizeof(*s));
-    s->stats = g_malloc0(sizeof(*s->stats));

-    if (!bs) {
-        return s;
-    }
-
-    /* Skip automatically inserted nodes that the user isn't aware of in
-     * a BlockBackend-level command. Stay at the exact node for a node-level
-     * command. */
-    while (blk_level && bs->drv && bs->implicit) {
-        bs = backing_bs(bs);
-        assert(bs);
+    if (bdrv_get_device_name(bs)[0]) {
+        s->has_device = true;
+        s->device = g_strdup(bdrv_get_device_name(bs));
    }

    if (bdrv_get_node_name(bs)[0]) {
@@ -463,16 +343,28 @@ static BlockStats *bdrv_query_bds_stats(BlockDriverState *bs,
        s->node_name = g_strdup(bdrv_get_node_name(bs));
    }

-    s->stats->wr_highest_offset = bs->wr_highest_offset;
+    s->stats = g_malloc0(sizeof(*s->stats));
+    s->stats->rd_bytes = bs->stats.nr_bytes[BLOCK_ACCT_READ];
+    s->stats->wr_bytes = bs->stats.nr_bytes[BLOCK_ACCT_WRITE];
+    s->stats->rd_operations = bs->stats.nr_ops[BLOCK_ACCT_READ];
+    s->stats->wr_operations = bs->stats.nr_ops[BLOCK_ACCT_WRITE];
+    s->stats->rd_merged = bs->stats.merged[BLOCK_ACCT_READ];
+    s->stats->wr_merged = bs->stats.merged[BLOCK_ACCT_WRITE];
+    s->stats->wr_highest_offset =
+        bs->stats.wr_highest_sector * BDRV_SECTOR_SIZE;
+    s->stats->flush_operations = bs->stats.nr_ops[BLOCK_ACCT_FLUSH];
+    s->stats->wr_total_time_ns = bs->stats.total_time_ns[BLOCK_ACCT_WRITE];
+    s->stats->rd_total_time_ns = bs->stats.total_time_ns[BLOCK_ACCT_READ];
+    s->stats->flush_total_time_ns = bs->stats.total_time_ns[BLOCK_ACCT_FLUSH];

    if (bs->file) {
        s->has_parent = true;
-        s->parent = bdrv_query_bds_stats(bs->file->bs, blk_level);
+        s->parent = bdrv_query_stats(bs->file, query_backing);
    }

-    if (blk_level && bs->backing) {
+    if (query_backing && bs->backing_hd) {
        s->has_backing = true;
-        s->backing = bdrv_query_bds_stats(bs->backing->bs, blk_level);
+        s->backing = bdrv_query_stats(bs->backing_hd, query_backing);
    }

    return s;
@@ -489,9 +381,7 @@ BlockInfoList *qmp_query_block(Error **errp)
        bdrv_query_info(blk, &info->value, &local_err);
        if (local_err) {
            error_propagate(errp, local_err);
-            g_free(info);
-            qapi_free_BlockInfoList(head);
-            return NULL;
+            goto err;
        }

        *p_next = info;
@@ -499,6 +389,10 @@ BlockInfoList *qmp_query_block(Error **errp)
    }

    return head;
+
+ err:
+    qapi_free_BlockInfoList(head);
+    return NULL;
 }

 BlockStatsList *qmp_query_blockstats(bool has_query_nodes,
@@ -506,39 +400,21 @@ BlockStatsList *qmp_query_blockstats(bool has_query_nodes,
                                     Error **errp)
 {
    BlockStatsList *head = NULL, **p_next = &head;
-    BlockBackend *blk;
-    BlockDriverState *bs;
+    BlockDriverState *bs = NULL;

    /* Just to be safe if query_nodes is not always initialized */
-    if (has_query_nodes && query_nodes) {
-        for (bs = bdrv_next_node(NULL); bs; bs = bdrv_next_node(bs)) {
-            BlockStatsList *info = g_malloc0(sizeof(*info));
-            AioContext *ctx = bdrv_get_aio_context(bs);
+    query_nodes = has_query_nodes && query_nodes;

-            aio_context_acquire(ctx);
-            info->value = bdrv_query_bds_stats(bs, false);
-            aio_context_release(ctx);
+    while ((bs = query_nodes ? bdrv_next_node(bs) : bdrv_next(bs))) {
+        BlockStatsList *info = g_malloc0(sizeof(*info));
+        AioContext *ctx = bdrv_get_aio_context(bs);

-            *p_next = info;
-            p_next = &info->next;
-        }
-    } else {
-        for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
-            BlockStatsList *info = g_malloc0(sizeof(*info));
-            AioContext *ctx = blk_get_aio_context(blk);
-            BlockStats *s;
+        aio_context_acquire(ctx);
+        info->value = bdrv_query_stats(bs, !query_nodes);
+        aio_context_release(ctx);

-            aio_context_acquire(ctx);
-            s = bdrv_query_bds_stats(blk_bs(blk), true);
-            s->has_device = true;
-            s->device = g_strdup(blk_name(blk));
-            bdrv_query_blk_stats(s->stats, blk);
-            aio_context_release(ctx);
-
-            info->value = s;
-            *p_next = info;
-            p_next = &info->next;
-        }
+        *p_next = info;
+        p_next = &info->next;
    }

    return head;
@@ -659,10 +535,11 @@ static void dump_qlist(fprintf_function func_fprintf, void *f, int indentation,
    int i = 0;

    for (entry = qlist_first(list); entry; entry = qlist_next(entry), i++) {
-        QType type = qobject_type(entry->value);
+        qtype_code type = qobject_type(entry->value);
        bool composite = (type == QTYPE_QDICT || type == QTYPE_QLIST);
-        func_fprintf(f, "%*s[%i]:%c", indentation * 4, "", i,
-                     composite ? '\n' : ' ');
+        const char *format = composite ? "%*s[%i]:\n" : "%*s[%i]: ";
+
+        func_fprintf(f, format, indentation * 4, "", i);
        dump_qobject(func_fprintf, f, indentation + 1, entry->value);
        if (!composite) {
            func_fprintf(f, "\n");
@@ -676,9 +553,10 @@ static void dump_qdict(fprintf_function func_fprintf, void *f, int indentation,
    const QDictEntry *entry;

    for (entry = qdict_first(dict); entry; entry = qdict_next(dict, entry)) {
-        QType type = qobject_type(entry->value);
+        qtype_code type = qobject_type(entry->value);
        bool composite = (type == QTYPE_QDICT || type == QTYPE_QLIST);
-        char *key = g_malloc(strlen(entry->key) + 1);
+        const char *format = composite ? "%*s%s:\n" : "%*s%s: ";
+        char key[strlen(entry->key) + 1];
        int i;

        /* replace dashes with spaces in key (variable) names */
@@ -686,28 +564,28 @@ static void dump_qdict(fprintf_function func_fprintf, void *f, int indentation,
            key[i] = entry->key[i] == '-' ? ' ' : entry->key[i];
        }
        key[i] = 0;
-        func_fprintf(f, "%*s%s:%c", indentation * 4, "", key,
-                     composite ? '\n' : ' ');
+
+        func_fprintf(f, format, indentation * 4, "", key);
        dump_qobject(func_fprintf, f, indentation + 1, entry->value);
        if (!composite) {
            func_fprintf(f, "\n");
        }
-        g_free(key);
    }
 }

 void bdrv_image_info_specific_dump(fprintf_function func_fprintf, void *f,
                                   ImageInfoSpecific *info_spec)
 {
+    QmpOutputVisitor *ov = qmp_output_visitor_new();
    QObject *obj, *data;
-    Visitor *v = qobject_output_visitor_new(&obj);

-    visit_type_ImageInfoSpecific(v, NULL, &info_spec, &error_abort);
-    visit_complete(v, &obj);
+    visit_type_ImageInfoSpecific(qmp_output_get_visitor(ov), &info_spec, NULL,
+                                 &error_abort);
+    obj = qmp_output_get_qobject(ov);
+    assert(qobject_type(obj) == QTYPE_QDICT);
    data = qdict_get(qobject_to_qdict(obj), "data");
    dump_qobject(func_fprintf, f, 1, data);
-    qobject_decref(obj);
-    visit_free(v);
+    qmp_output_visitor_cleanup(ov);
 }

 void bdrv_image_info_dump(fprintf_function func_fprintf, void *f,
@@ -745,10 +623,7 @@ void bdrv_image_info_dump(fprintf_function func_fprintf, void *f,

    if (info->has_backing_filename) {
        func_fprintf(f, "backing file: %s", info->backing_filename);
-        if (!info->has_full_backing_filename) {
-            func_fprintf(f, " (cannot determine actual path)");
-        } else if (strcmp(info->backing_filename,
-                          info->full_backing_filename) != 0) {
+        if (info->has_full_backing_filename) {
            func_fprintf(f, " (actual path: %s)", info->full_backing_filename);
        }
        func_fprintf(f, "\n");
@@ -21,14 +21,9 @@
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
-#include "qemu/osdep.h"
-#include "qapi/error.h"
 #include "qemu-common.h"
-#include "qemu/error-report.h"
 #include "block/block_int.h"
-#include "sysemu/block-backend.h"
 #include "qemu/module.h"
-#include "qemu/bswap.h"
 #include <zlib.h>
 #include "qapi/qmp/qerror.h"
 #include "crypto/cipher.h"
@@ -104,13 +99,6 @@ static int qcow_open(BlockDriverState *bs, QDict *options, int flags,
    unsigned int len, i, shift;
    int ret;
    QCowHeader header;
-    Error *local_err = NULL;
-
-    bs->file = bdrv_open_child(NULL, options, "file", bs, &child_file,
-                               false, errp);
-    if (!bs->file) {
-        return -EINVAL;
-    }

    ret = bdrv_pread(bs->file, 0, &header, sizeof(header));
    if (ret < 0) {
@@ -131,7 +119,11 @@ static int qcow_open(BlockDriverState *bs, QDict *options, int flags,
        goto fail;
    }
    if (header.version != QCOW_VERSION) {
-        error_setg(errp, "Unsupported qcow version %" PRIu32, header.version);
+        char version[64];
+        snprintf(version, sizeof(version), "QCOW version %" PRIu32,
+                 header.version);
+        error_setg(errp, QERR_UNKNOWN_BLOCK_FORMAT_FEATURE,
+                   bdrv_get_device_or_node_name(bs), "qcow", version);
        ret = -ENOTSUP;
        goto fail;
    }
@@ -160,29 +152,14 @@ static int qcow_open(BlockDriverState *bs, QDict *options, int flags,
        ret = -EINVAL;
        goto fail;
    }
-    if (!qcrypto_cipher_supports(QCRYPTO_CIPHER_ALG_AES_128,
-                                 QCRYPTO_CIPHER_MODE_CBC)) {
+    if (!qcrypto_cipher_supports(QCRYPTO_CIPHER_ALG_AES_128)) {
        error_setg(errp, "AES cipher not available");
        ret = -EINVAL;
        goto fail;
    }
    s->crypt_method_header = header.crypt_method;
    if (s->crypt_method_header) {
-        if (bdrv_uses_whitelist() &&
-            s->crypt_method_header == QCOW_CRYPT_AES) {
-            error_setg(errp,
-                       "Use of AES-CBC encrypted qcow images is no longer "
-                       "supported in system emulators");
-            error_append_hint(errp,
-                              "You can use 'qemu-img convert' to convert your "
-                              "image to an alternative supported format, such "
-                              "as unencrypted qcow, or raw with the LUKS "
-                              "format instead.\n");
-            ret = -ENOSYS;
-            goto fail;
-        }
-
-        bs->encrypted = true;
+        bs->encrypted = 1;
    }
    s->cluster_bits = header.cluster_bits;
    s->cluster_size = 1 << s->cluster_bits;
@@ -228,7 +205,7 @@ static int qcow_open(BlockDriverState *bs, QDict *options, int flags,

    /* alloc L2 cache (max. 64k * 16 * 8 = 8 MB) */
    s->l2_cache =
-        qemu_try_blockalign(bs->file->bs,
+        qemu_try_blockalign(bs->file,
                            s->l2_size * L2_CACHE_SIZE * sizeof(uint64_t));
    if (s->l2_cache == NULL) {
        error_setg(errp, "Could not allocate L2 table cache");
@@ -259,12 +236,7 @@ static int qcow_open(BlockDriverState *bs, QDict *options, int flags,
    error_setg(&s->migration_blocker, "The qcow format used by node '%s' "
               "does not support live migration",
               bdrv_get_device_or_node_name(bs));
-    ret = migrate_add_blocker(s->migration_blocker, &local_err);
-    if (local_err) {
-        error_propagate(errp, local_err);
-        error_free(s->migration_blocker);
-        goto fail;
-    }
+    migrate_add_blocker(s->migration_blocker);

    qemu_co_mutex_init(&s->lock);
    return 0;
@@ -397,7 +369,7 @@ static uint64_t get_cluster_offset(BlockDriverState *bs,
        if (!allocate)
            return 0;
        /* allocate a new l2 entry */
-        l2_offset = bdrv_getlength(bs->file->bs);
+        l2_offset = bdrv_getlength(bs->file);
        /* round to cluster size */
        l2_offset = (l2_offset + s->cluster_size - 1) & ~(s->cluster_size - 1);
        /* update the L1 entry */
@@ -437,8 +409,7 @@ static uint64_t get_cluster_offset(BlockDriverState *bs,
                s->l2_size * sizeof(uint64_t)) < 0)
            return 0;
    } else {
-        if (bdrv_pread(bs->file, l2_offset, l2_table,
-                       s->l2_size * sizeof(uint64_t)) !=
+        if (bdrv_pread(bs->file, l2_offset, l2_table, s->l2_size * sizeof(uint64_t)) !=
            s->l2_size * sizeof(uint64_t))
            return 0;
    }
@@ -459,21 +430,20 @@ static uint64_t get_cluster_offset(BlockDriverState *bs,
               overwritten */
            if (decompress_cluster(bs, cluster_offset) < 0)
                return 0;
-            cluster_offset = bdrv_getlength(bs->file->bs);
+            cluster_offset = bdrv_getlength(bs->file);
            cluster_offset = (cluster_offset + s->cluster_size - 1) &
                ~(s->cluster_size - 1);
            /* write the cluster content */
-            if (bdrv_pwrite(bs->file, cluster_offset, s->cluster_cache,
-                            s->cluster_size) !=
+            if (bdrv_pwrite(bs->file, cluster_offset, s->cluster_cache, s->cluster_size) !=
                s->cluster_size)
                return -1;
        } else {
-            cluster_offset = bdrv_getlength(bs->file->bs);
+            cluster_offset = bdrv_getlength(bs->file);
            if (allocate == 1) {
                /* round to cluster size */
                cluster_offset = (cluster_offset + s->cluster_size - 1) &
                    ~(s->cluster_size - 1);
-                bdrv_truncate(bs->file, cluster_offset + s->cluster_size, NULL);
+                bdrv_truncate(bs->file, cluster_offset + s->cluster_size);
                /* if encrypted, we must initialize the cluster
                   content which won't be written */
                if (bs->encrypted &&
@@ -493,8 +463,7 @@ static uint64_t get_cluster_offset(BlockDriverState *bs,
                                errno = EIO;
                                return -1;
                            }
-                            if (bdrv_pwrite(bs->file,
-                                            cluster_offset + i * 512,
+                            if (bdrv_pwrite(bs->file, cluster_offset + i * 512,
                                            s->cluster_data, 512) != 512)
                                return -1;
                        }
@@ -516,7 +485,7 @@ static uint64_t get_cluster_offset(BlockDriverState *bs,
 }

 static int64_t coroutine_fn qcow_co_get_block_status(BlockDriverState *bs,
-        int64_t sector_num, int nb_sectors, int *pnum, BlockDriverState **file)
+        int64_t sector_num, int nb_sectors, int *pnum)
 {
    BDRVQcowState *s = bs->opaque;
    int index_in_cluster, n;
@@ -537,7 +506,6 @@ static int64_t coroutine_fn qcow_co_get_block_status(BlockDriverState *bs,
        return BDRV_BLOCK_DATA;
    }
    cluster_offset |= (index_in_cluster << BDRV_SECTOR_BITS);
-    *file = bs->file->bs;
    return BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID | cluster_offset;
 }

@@ -626,13 +594,14 @@ static coroutine_fn int qcow_co_readv(BlockDriverState *bs, int64_t sector_num,
        }

        if (!cluster_offset) {
-            if (bs->backing) {
+            if (bs->backing_hd) {
                /* read from the base image */
                hd_iov.iov_base = (void *)buf;
                hd_iov.iov_len = n * 512;
                qemu_iovec_init_external(&hd_qiov, &hd_iov, 1);
                qemu_co_mutex_unlock(&s->lock);
-                ret = bdrv_co_readv(bs->backing, sector_num, n, &hd_qiov);
+                ret = bdrv_co_readv(bs->backing_hd, sector_num,
+                                    n, &hd_qiov);
                qemu_co_mutex_lock(&s->lock);
                if (ret < 0) {
                    goto fail;
@@ -806,7 +775,7 @@ static int qcow_create(const char *filename, QemuOpts *opts, Error **errp)
    int flags = 0;
    Error *local_err = NULL;
    int ret;
-    BlockBackend *qcow_blk;
+    BlockDriverState *qcow_bs;

    /* Read out options */
    total_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
@@ -822,18 +791,15 @@ static int qcow_create(const char *filename, QemuOpts *opts, Error **errp)
        goto cleanup;
    }

-    qcow_blk = blk_new_open(filename, NULL, NULL,
-                            BDRV_O_RDWR | BDRV_O_RESIZE | BDRV_O_PROTOCOL,
-                            &local_err);
-    if (qcow_blk == NULL) {
+    qcow_bs = NULL;
+    ret = bdrv_open(&qcow_bs, filename, NULL, NULL,
+                    BDRV_O_RDWR | BDRV_O_PROTOCOL, NULL, &local_err);
+    if (ret < 0) {
        error_propagate(errp, local_err);
-        ret = -EIO;
        goto cleanup;
    }

-    blk_set_allow_write_beyond_eof(qcow_blk, true);
-
-    ret = blk_truncate(qcow_blk, 0, errp);
+    ret = bdrv_truncate(qcow_bs, 0);
    if (ret < 0) {
        goto exit;
    }
@@ -873,24 +839,24 @@ static int qcow_create(const char *filename, QemuOpts *opts, Error **errp)
    }

    /* write all the data */
-    ret = blk_pwrite(qcow_blk, 0, &header, sizeof(header), 0);
+    ret = bdrv_pwrite(qcow_bs, 0, &header, sizeof(header));
    if (ret != sizeof(header)) {
        goto exit;
    }

    if (backing_file) {
-        ret = blk_pwrite(qcow_blk, sizeof(header),
-                         backing_file, backing_filename_len, 0);
+        ret = bdrv_pwrite(qcow_bs, sizeof(header),
+            backing_file, backing_filename_len);
        if (ret != backing_filename_len) {
            goto exit;
        }
    }

    tmp = g_malloc0(BDRV_SECTOR_SIZE);
-    for (i = 0; i < DIV_ROUND_UP(sizeof(uint64_t) * l1_size, BDRV_SECTOR_SIZE);
-         i++) {
-        ret = blk_pwrite(qcow_blk, header_size + BDRV_SECTOR_SIZE * i,
-                         tmp, BDRV_SECTOR_SIZE, 0);
+    for (i = 0; i < ((sizeof(uint64_t)*l1_size + BDRV_SECTOR_SIZE - 1)/
+        BDRV_SECTOR_SIZE); i++) {
+        ret = bdrv_pwrite(qcow_bs, header_size +
+            BDRV_SECTOR_SIZE*i, tmp, BDRV_SECTOR_SIZE);
        if (ret != BDRV_SECTOR_SIZE) {
            g_free(tmp);
            goto exit;
@@ -900,7 +866,7 @@ static int qcow_create(const char *filename, QemuOpts *opts, Error **errp)
    g_free(tmp);
    ret = 0;
 exit:
-    blk_unref(qcow_blk);
+    bdrv_unref(qcow_bs);
 cleanup:
    g_free(backing_file);
    return ret;
@@ -916,7 +882,7 @@ static int qcow_make_empty(BlockDriverState *bs)
    if (bdrv_pwrite_sync(bs->file, s->l1_table_offset, s->l1_table,
            l1_length) < 0)
        return -1;
-    ret = bdrv_truncate(bs->file, s->l1_table_offset + l1_length, NULL);
+    ret = bdrv_truncate(bs->file, s->l1_table_offset + l1_length);
    if (ret < 0)
        return ret;

@@ -929,32 +895,32 @@ static int qcow_make_empty(BlockDriverState *bs)

 /* XXX: put compressed sectors first, then all the cluster aligned
   tables to avoid losing bytes in alignment */
-static coroutine_fn int
-qcow_co_pwritev_compressed(BlockDriverState *bs, uint64_t offset,
-                           uint64_t bytes, QEMUIOVector *qiov)
+static int qcow_write_compressed(BlockDriverState *bs, int64_t sector_num,
+                                 const uint8_t *buf, int nb_sectors)
 {
    BDRVQcowState *s = bs->opaque;
-    QEMUIOVector hd_qiov;
-    struct iovec iov;
    z_stream strm;
    int ret, out_len;
-    uint8_t *buf, *out_buf;
+    uint8_t *out_buf;
    uint64_t cluster_offset;

-    buf = qemu_blockalign(bs, s->cluster_size);
-    if (bytes != s->cluster_size) {
-        if (bytes > s->cluster_size ||
-            offset + bytes != bs->total_sectors << BDRV_SECTOR_BITS)
-        {
-            qemu_vfree(buf);
-            return -EINVAL;
-        }
-        /* Zero-pad last write if image size is not cluster aligned */
-        memset(buf + bytes, 0, s->cluster_size - bytes);
-    }
-    qemu_iovec_to_buf(qiov, 0, buf, qiov->size);
+    if (nb_sectors != s->cluster_sectors) {
+        ret = -EINVAL;

-    out_buf = g_malloc(s->cluster_size);
+        /* Zero-pad last write if image size is not cluster aligned */
+        if (sector_num + nb_sectors == bs->total_sectors &&
+            nb_sectors < s->cluster_sectors) {
+            uint8_t *pad_buf = qemu_blockalign(bs, s->cluster_size);
+            memset(pad_buf, 0, s->cluster_size);
+            memcpy(pad_buf, buf, nb_sectors * BDRV_SECTOR_SIZE);
+            ret = qcow_write_compressed(bs, sector_num,
+                                        pad_buf, s->cluster_sectors);
+            qemu_vfree(pad_buf);
+        }
+        return ret;
+    }
+
+    out_buf = g_malloc(s->cluster_size + (s->cluster_size / 1000) + 128);

    /* best compression, small window, no zlib header */
    memset(&strm, 0, sizeof(strm));
@@ -983,35 +949,27 @@ qcow_co_pwritev_compressed(BlockDriverState *bs, uint64_t offset,

    if (ret != Z_STREAM_END || out_len >= s->cluster_size) {
        /* could not compress: write normal cluster */
-        ret = qcow_co_writev(bs, offset >> BDRV_SECTOR_BITS,
-                             bytes >> BDRV_SECTOR_BITS, qiov);
+        ret = bdrv_write(bs, sector_num, buf, s->cluster_sectors);
        if (ret < 0) {
            goto fail;
        }
-        goto success;
-    }
-    qemu_co_mutex_lock(&s->lock);
-    cluster_offset = get_cluster_offset(bs, offset, 2, out_len, 0, 0);
-    qemu_co_mutex_unlock(&s->lock);
-    if (cluster_offset == 0) {
-        ret = -EIO;
-        goto fail;
-    }
-    cluster_offset &= s->cluster_offset_mask;
+    } else {
+        cluster_offset = get_cluster_offset(bs, sector_num << 9, 2,
+                                            out_len, 0, 0);
+        if (cluster_offset == 0) {
+            ret = -EIO;
+            goto fail;
+        }

-    iov = (struct iovec) {
-        .iov_base   = out_buf,
-        .iov_len    = out_len,
-    };
-    qemu_iovec_init_external(&hd_qiov, &iov, 1);
-    ret = bdrv_co_pwritev(bs->file, cluster_offset, out_len, &hd_qiov, 0);
-    if (ret < 0) {
-        goto fail;
+        cluster_offset &= s->cluster_offset_mask;
+        ret = bdrv_pwrite(bs->file, cluster_offset, out_buf, out_len);
+        if (ret < 0) {
+            goto fail;
+        }
    }
-success:
+
    ret = 0;
 fail:
-    qemu_vfree(buf);
    g_free(out_buf);
    return ret;
 }
@@ -1053,7 +1011,6 @@ static BlockDriver bdrv_qcow = {
    .bdrv_probe		= qcow_probe,
    .bdrv_open		= qcow_open,
    .bdrv_close		= qcow_close,
-    .bdrv_child_perm        = bdrv_format_default_perms,
    .bdrv_reopen_prepare    = qcow_reopen_prepare,
    .bdrv_create            = qcow_create,
    .bdrv_has_zero_init     = bdrv_has_zero_init_1,
@@ -1065,7 +1022,7 @@ static BlockDriver bdrv_qcow = {

    .bdrv_set_key           = qcow_set_key,
    .bdrv_make_empty        = qcow_make_empty,
-    .bdrv_co_pwritev_compressed = qcow_co_pwritev_compressed,
+    .bdrv_write_compressed  = qcow_write_compressed,
    .bdrv_get_info          = qcow_get_info,

    .create_opts            = &qcow_create_opts,
@@ -22,7 +22,6 @@
 * THE SOFTWARE.
 */

-#include "qemu/osdep.h"
 #include "block/block_int.h"
 #include "qemu-common.h"
 #include "qcow2.h"
@@ -30,9 +29,9 @@

 typedef struct Qcow2CachedTable {
    int64_t  offset;
+    bool     dirty;
    uint64_t lru_counter;
    int      ref;
-    bool     dirty;
 } Qcow2CachedTable;

 struct Qcow2Cache {
@@ -42,86 +41,34 @@ struct Qcow2Cache {
    bool                    depends_on_flush;
    void                   *table_array;
    uint64_t                lru_counter;
-    uint64_t                cache_clean_lru_counter;
 };

 static inline void *qcow2_cache_get_table_addr(BlockDriverState *bs,
                    Qcow2Cache *c, int table)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    return (uint8_t *) c->table_array + (size_t) table * s->cluster_size;
 }

 static inline int qcow2_cache_get_table_idx(BlockDriverState *bs,
                  Qcow2Cache *c, void *table)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    ptrdiff_t table_offset = (uint8_t *) table - (uint8_t *) c->table_array;
    int idx = table_offset / s->cluster_size;
    assert(idx >= 0 && idx < c->size && table_offset % s->cluster_size == 0);
    return idx;
 }

-static void qcow2_cache_table_release(BlockDriverState *bs, Qcow2Cache *c,
-                                      int i, int num_tables)
-{
-/* Using MADV_DONTNEED to discard memory is a Linux-specific feature */
-#ifdef CONFIG_LINUX
-    BDRVQcow2State *s = bs->opaque;
-    void *t = qcow2_cache_get_table_addr(bs, c, i);
-    int align = getpagesize();
-    size_t mem_size = (size_t) s->cluster_size * num_tables;
-    size_t offset = QEMU_ALIGN_UP((uintptr_t) t, align) - (uintptr_t) t;
-    size_t length = QEMU_ALIGN_DOWN(mem_size - offset, align);
-    if (length > 0) {
-        madvise((uint8_t *) t + offset, length, MADV_DONTNEED);
-    }
-#endif
-}
-
-static inline bool can_clean_entry(Qcow2Cache *c, int i)
-{
-    Qcow2CachedTable *t = &c->entries[i];
-    return t->ref == 0 && !t->dirty && t->offset != 0 &&
-        t->lru_counter <= c->cache_clean_lru_counter;
-}
-
-void qcow2_cache_clean_unused(BlockDriverState *bs, Qcow2Cache *c)
-{
-    int i = 0;
-    while (i < c->size) {
-        int to_clean = 0;
-
-        /* Skip the entries that we don't need to clean */
-        while (i < c->size && !can_clean_entry(c, i)) {
-            i++;
-        }
-
-        /* And count how many we can clean in a row */
-        while (i < c->size && can_clean_entry(c, i)) {
-            c->entries[i].offset = 0;
-            c->entries[i].lru_counter = 0;
-            i++;
-            to_clean++;
-        }
-
-        if (to_clean > 0) {
-            qcow2_cache_table_release(bs, c, i - to_clean, to_clean);
-        }
-    }
-
-    c->cache_clean_lru_counter = c->lru_counter;
-}
-
 Qcow2Cache *qcow2_cache_create(BlockDriverState *bs, int num_tables)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    Qcow2Cache *c;

    c = g_new0(Qcow2Cache, 1);
    c->size = num_tables;
    c->entries = g_try_new0(Qcow2CachedTable, num_tables);
-    c->table_array = qemu_try_blockalign(bs->file->bs,
+    c->table_array = qemu_try_blockalign(bs->file,
                                         (size_t) num_tables * s->cluster_size);

    if (!c->entries || !c->table_array) {
@@ -166,7 +113,7 @@ static int qcow2_cache_flush_dependency(BlockDriverState *bs, Qcow2Cache *c)

 static int qcow2_cache_entry_flush(BlockDriverState *bs, Qcow2Cache *c, int i)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    int ret = 0;

    if (!c->entries[i].dirty || !c->entries[i].offset) {
@@ -179,7 +126,7 @@ static int qcow2_cache_entry_flush(BlockDriverState *bs, Qcow2Cache *c, int i)
    if (c->depends) {
        ret = qcow2_cache_flush_dependency(bs, c);
    } else if (c->depends_on_flush) {
-        ret = bdrv_flush(bs->file->bs);
+        ret = bdrv_flush(bs->file);
        if (ret >= 0) {
            c->depends_on_flush = false;
        }
@@ -221,9 +168,9 @@ static int qcow2_cache_entry_flush(BlockDriverState *bs, Qcow2Cache *c, int i)
    return 0;
 }

-int qcow2_cache_write(BlockDriverState *bs, Qcow2Cache *c)
+int qcow2_cache_flush(BlockDriverState *bs, Qcow2Cache *c)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    int result = 0;
    int ret;
    int i;
@@ -237,15 +184,8 @@ int qcow2_cache_write(BlockDriverState *bs, Qcow2Cache *c)
        }
    }

-    return result;
-}
-
-int qcow2_cache_flush(BlockDriverState *bs, Qcow2Cache *c)
-{
-    int result = qcow2_cache_write(bs, c);
-
    if (result == 0) {
-        int ret = bdrv_flush(bs->file->bs);
+        ret = bdrv_flush(bs->file);
        if (ret < 0) {
            result = ret;
        }
@@ -297,8 +237,6 @@ int qcow2_cache_empty(BlockDriverState *bs, Qcow2Cache *c)
        c->entries[i].lru_counter = 0;
    }

-    qcow2_cache_table_release(bs, c, 0, c->size);
-
    c->lru_counter = 0;

    return 0;
@@ -307,7 +245,7 @@ int qcow2_cache_empty(BlockDriverState *bs, Qcow2Cache *c)
 static int qcow2_cache_do_get(BlockDriverState *bs, Qcow2Cache *c,
    uint64_t offset, void **table, bool read_from_disk)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    int i;
    int ret;
    int lookup_index;
@@ -357,8 +295,7 @@ static int qcow2_cache_do_get(BlockDriverState *bs, Qcow2Cache *c,
            BLKDBG_EVENT(bs->file, BLKDBG_L2_LOAD);
        }

-        ret = bdrv_pread(bs->file, offset,
-                         qcow2_cache_get_table_addr(bs, c, i),
+        ret = bdrv_pread(bs->file, offset, qcow2_cache_get_table_addr(bs, c, i),
                         s->cluster_size);
        if (ret < 0) {
            return ret;
@@ -22,20 +22,17 @@
 * THE SOFTWARE.
 */

-#include "qemu/osdep.h"
 #include <zlib.h>

-#include "qapi/error.h"
 #include "qemu-common.h"
 #include "block/block_int.h"
 #include "block/qcow2.h"
-#include "qemu/bswap.h"
 #include "trace.h"

 int qcow2_grow_l1_table(BlockDriverState *bs, uint64_t min_size,
                        bool exact_size)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    int new_l1_size2, ret, i;
    uint64_t *new_l1_table;
    int64_t old_l1_table_offset, old_l1_size;
@@ -65,8 +62,7 @@ int qcow2_grow_l1_table(BlockDriverState *bs, uint64_t min_size,
        }
    }

-    QEMU_BUILD_BUG_ON(QCOW_MAX_L1_SIZE > INT_MAX);
-    if (new_l1_size > QCOW_MAX_L1_SIZE / sizeof(uint64_t)) {
+    if (new_l1_size > INT_MAX / sizeof(uint64_t)) {
        return -EFBIG;
    }

@@ -76,16 +72,14 @@ int qcow2_grow_l1_table(BlockDriverState *bs, uint64_t min_size,
 #endif

    new_l1_size2 = sizeof(uint64_t) * new_l1_size;
-    new_l1_table = qemu_try_blockalign(bs->file->bs,
+    new_l1_table = qemu_try_blockalign(bs->file,
                                       align_offset(new_l1_size2, 512));
    if (new_l1_table == NULL) {
        return -ENOMEM;
    }
    memset(new_l1_table, 0, align_offset(new_l1_size2, 512));

-    if (s->l1_size) {
-        memcpy(new_l1_table, s->l1_table, s->l1_size * sizeof(uint64_t));
-    }
+    memcpy(new_l1_table, s->l1_table, s->l1_size * sizeof(uint64_t));

    /* write new table (align to cluster) */
    BLKDBG_EVENT(bs->file, BLKDBG_L1_GROW_ALLOC_TABLE);
@@ -111,8 +105,7 @@ int qcow2_grow_l1_table(BlockDriverState *bs, uint64_t min_size,
    BLKDBG_EVENT(bs->file, BLKDBG_L1_GROW_WRITE_TABLE);
    for(i = 0; i < s->l1_size; i++)
        new_l1_table[i] = cpu_to_be64(new_l1_table[i]);
-    ret = bdrv_pwrite_sync(bs->file, new_l1_table_offset,
-                           new_l1_table, new_l1_size2);
+    ret = bdrv_pwrite_sync(bs->file, new_l1_table_offset, new_l1_table, new_l1_size2);
    if (ret < 0)
        goto fail;
    for(i = 0; i < s->l1_size; i++)
@@ -120,10 +113,9 @@ int qcow2_grow_l1_table(BlockDriverState *bs, uint64_t min_size,

    /* set new table */
    BLKDBG_EVENT(bs->file, BLKDBG_L1_GROW_ACTIVATE_TABLE);
-    stl_be_p(data, new_l1_size);
+    cpu_to_be32w((uint32_t*)data, new_l1_size);
    stq_be_p(data + 4, new_l1_table_offset);
-    ret = bdrv_pwrite_sync(bs->file, offsetof(QCowHeader, l1_size),
-                           data, sizeof(data));
+    ret = bdrv_pwrite_sync(bs->file, offsetof(QCowHeader, l1_size), data,sizeof(data));
    if (ret < 0) {
        goto fail;
    }
@@ -156,10 +148,12 @@ int qcow2_grow_l1_table(BlockDriverState *bs, uint64_t min_size,
 static int l2_load(BlockDriverState *bs, uint64_t l2_offset,
    uint64_t **l2_table)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
+    int ret;

-    return qcow2_cache_get(bs, s->l2_table_cache, l2_offset,
-                           (void **)l2_table);
+    ret = qcow2_cache_get(bs, s->l2_table_cache, l2_offset, (void**) l2_table);
+
+    return ret;
 }

 /*
@@ -169,7 +163,7 @@ static int l2_load(BlockDriverState *bs, uint64_t l2_offset,
 #define L1_ENTRIES_PER_SECTOR (512 / 8)
 int qcow2_write_l1_entry(BlockDriverState *bs, int l1_index)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    uint64_t buf[L1_ENTRIES_PER_SECTOR] = { 0 };
    int l1_start_index;
    int i, ret;
@@ -188,9 +182,8 @@ int qcow2_write_l1_entry(BlockDriverState *bs, int l1_index)
    }

    BLKDBG_EVENT(bs->file, BLKDBG_L1_UPDATE);
-    ret = bdrv_pwrite_sync(bs->file,
-                           s->l1_table_offset + 8 * l1_start_index,
-                           buf, sizeof(buf));
+    ret = bdrv_pwrite_sync(bs->file, s->l1_table_offset + 8 * l1_start_index,
+        buf, sizeof(buf));
    if (ret < 0) {
        return ret;
    }
@@ -210,7 +203,7 @@ int qcow2_write_l1_entry(BlockDriverState *bs, int l1_index)

 static int l2_allocate(BlockDriverState *bs, int l1_index, uint64_t **table)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    uint64_t old_l2_offset;
    uint64_t *l2_table = NULL;
    int64_t l2_offset;
@@ -316,7 +309,7 @@ static int count_contiguous_clusters(int nb_clusters, int cluster_size,
    if (!offset)
        return 0;

-    assert(qcow2_get_cluster_type(first_entry) == QCOW2_CLUSTER_NORMAL);
+    assert(qcow2_get_cluster_type(first_entry) != QCOW2_CLUSTER_COMPRESSED);

    for (i = 0; i < nb_clusters; i++) {
        uint64_t l2_entry = be64_to_cpu(l2_table[i]) & mask;
@@ -328,16 +321,14 @@ static int count_contiguous_clusters(int nb_clusters, int cluster_size,
 	return i;
 }

-static int count_contiguous_clusters_by_type(int nb_clusters,
-                                             uint64_t *l2_table,
-                                             int wanted_type)
+static int count_contiguous_free_clusters(int nb_clusters, uint64_t *l2_table)
 {
    int i;

    for (i = 0; i < nb_clusters; i++) {
        int type = qcow2_get_cluster_type(be64_to_cpu(l2_table[i]));

-        if (type != wanted_type) {
+        if (type != QCOW2_CLUSTER_UNALLOCATED) {
            break;
        }
    }
@@ -348,7 +339,7 @@ static int count_contiguous_clusters_by_type(int nb_clusters,
 /* The crypt function is compatible with the linux cryptoloop
   algorithm for < 4 GB images. NOTE: out_buf == in_buf is
   supported */
-int qcow2_encrypt_sectors(BDRVQcow2State *s, int64_t sector_num,
+int qcow2_encrypt_sectors(BDRVQcowState *s, int64_t sector_num,
                          uint8_t *out_buf, const uint8_t *in_buf,
                          int nb_sectors, bool enc,
                          Error **errp)
@@ -391,18 +382,22 @@ int qcow2_encrypt_sectors(BDRVQcow2State *s, int64_t sector_num,
    return 0;
 }

-static int coroutine_fn do_perform_cow(BlockDriverState *bs,
-                                       uint64_t src_cluster_offset,
-                                       uint64_t cluster_offset,
-                                       int offset_in_cluster,
-                                       int bytes)
+static int coroutine_fn copy_sectors(BlockDriverState *bs,
+                                     uint64_t start_sect,
+                                     uint64_t cluster_offset,
+                                     int n_start, int n_end)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    QEMUIOVector qiov;
    struct iovec iov;
-    int ret;
+    int n, ret;

-    iov.iov_len = bytes;
+    n = n_end - n_start;
+    if (n <= 0) {
+        return 0;
+    }
+
+    iov.iov_len = n * BDRV_SECTOR_SIZE;
    iov.iov_base = qemu_try_blockalign(bs, iov.iov_len);
    if (iov.iov_base == NULL) {
        return -ENOMEM;
@@ -421,21 +416,17 @@ static int coroutine_fn do_perform_cow(BlockDriverState *bs,
     * interface.  This avoids double I/O throttling and request tracking,
     * which can lead to deadlock when block layer copy-on-read is enabled.
     */
-    ret = bs->drv->bdrv_co_preadv(bs, src_cluster_offset + offset_in_cluster,
-                                  bytes, &qiov, 0);
+    ret = bs->drv->bdrv_co_readv(bs, start_sect + n_start, n, &qiov);
    if (ret < 0) {
        goto out;
    }

    if (bs->encrypted) {
        Error *err = NULL;
-        int64_t sector = (src_cluster_offset + offset_in_cluster)
-                         >> BDRV_SECTOR_BITS;
        assert(s->cipher);
-        assert((offset_in_cluster & ~BDRV_SECTOR_MASK) == 0);
-        assert((bytes & ~BDRV_SECTOR_MASK) == 0);
-        if (qcow2_encrypt_sectors(s, sector, iov.iov_base, iov.iov_base,
-                                  bytes >> BDRV_SECTOR_BITS, true, &err) < 0) {
+        if (qcow2_encrypt_sectors(s, start_sect + n_start,
+                                  iov.iov_base, iov.iov_base, n,
+                                  true, &err) < 0) {
            ret = -EIO;
            error_free(err);
            goto out;
@@ -443,14 +434,13 @@ static int coroutine_fn do_perform_cow(BlockDriverState *bs,
    }

    ret = qcow2_pre_write_overlap_check(bs, 0,
-            cluster_offset + offset_in_cluster, bytes);
+            cluster_offset + n_start * BDRV_SECTOR_SIZE, n * BDRV_SECTOR_SIZE);
    if (ret < 0) {
        goto out;
    }

    BLKDBG_EVENT(bs->file, BLKDBG_COW_WRITE);
-    ret = bdrv_co_pwritev(bs->file, cluster_offset + offset_in_cluster,
-                          bytes, &qiov, 0);
+    ret = bdrv_co_writev(bs->file, (cluster_offset >> 9) + n_start, n, &qiov);
    if (ret < 0) {
        goto out;
    }
@@ -465,47 +455,51 @@ out:
 /*
 * get_cluster_offset
 *
- * For a given offset of the virtual disk, find the cluster type and offset in
- * the qcow2 file. The offset is stored in *cluster_offset.
+ * For a given offset of the disk image, find the cluster offset in
+ * qcow2 file. The offset is stored in *cluster_offset.
 *
- * On entry, *bytes is the maximum number of contiguous bytes starting at
- * offset that we are interested in.
+ * on entry, *num is the number of contiguous sectors we'd like to
+ * access following offset.
 *
- * On exit, *bytes is the number of bytes starting at offset that have the same
- * cluster type and (if applicable) are stored contiguously in the image file.
- * Compressed clusters are always returned one by one.
+ * on exit, *num is the number of contiguous sectors we can read.
 *
 * Returns the cluster type (QCOW2_CLUSTER_*) on success, -errno in error
 * cases.
 */
 int qcow2_get_cluster_offset(BlockDriverState *bs, uint64_t offset,
-                             unsigned int *bytes, uint64_t *cluster_offset)
+    int *num, uint64_t *cluster_offset)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    unsigned int l2_index;
    uint64_t l1_index, l2_offset, *l2_table;
    int l1_bits, c;
-    unsigned int offset_in_cluster;
-    uint64_t bytes_available, bytes_needed, nb_clusters;
+    unsigned int index_in_cluster, nb_clusters;
+    uint64_t nb_available, nb_needed;
    int ret;

-    offset_in_cluster = offset_into_cluster(s, offset);
-    bytes_needed = (uint64_t) *bytes + offset_in_cluster;
+    index_in_cluster = (offset >> 9) & (s->cluster_sectors - 1);
+    nb_needed = *num + index_in_cluster;

    l1_bits = s->l2_bits + s->cluster_bits;

-    /* compute how many bytes there are between the start of the cluster
-     * containing offset and the end of the l1 entry */
-    bytes_available = (1ULL << l1_bits) - (offset & ((1ULL << l1_bits) - 1))
-                    + offset_in_cluster;
+    /* compute how many bytes there are between the offset and
+     * the end of the l1 entry
+     */

-    if (bytes_needed > bytes_available) {
-        bytes_needed = bytes_available;
+    nb_available = (1ULL << l1_bits) - (offset & ((1ULL << l1_bits) - 1));
+
+    /* compute the number of available sectors */
+
+    nb_available = (nb_available >> 9) + index_in_cluster;
+
+    if (nb_needed > nb_available) {
+        nb_needed = nb_available;
    }
+    assert(nb_needed <= INT_MAX);

    *cluster_offset = 0;

-    /* seek to the l2 offset in the l1 table */
+    /* seek the the l2 offset in the l1 table */

    l1_index = offset >> l1_bits;
    if (l1_index >= s->l1_size) {
@@ -538,11 +532,8 @@ int qcow2_get_cluster_offset(BlockDriverState *bs, uint64_t offset,
    l2_index = (offset >> s->cluster_bits) & (s->l2_size - 1);
    *cluster_offset = be64_to_cpu(l2_table[l2_index]);

-    nb_clusters = size_to_clusters(s, bytes_needed);
-    /* bytes_needed <= *bytes + offset_in_cluster, both of which are unsigned
-     * integers; the minimum cluster size is 512, so this assertion is always
-     * true */
-    assert(nb_clusters <= INT_MAX);
+    /* nb_needed <= INT_MAX, thus nb_clusters <= INT_MAX, too */
+    nb_clusters = size_to_clusters(s, nb_needed << 9);

    ret = qcow2_get_cluster_type(*cluster_offset);
    switch (ret) {
@@ -559,14 +550,13 @@ int qcow2_get_cluster_offset(BlockDriverState *bs, uint64_t offset,
            ret = -EIO;
            goto fail;
        }
-        c = count_contiguous_clusters_by_type(nb_clusters, &l2_table[l2_index],
-                                              QCOW2_CLUSTER_ZERO);
+        c = count_contiguous_clusters(nb_clusters, s->cluster_size,
+                &l2_table[l2_index], QCOW_OFLAG_ZERO);
        *cluster_offset = 0;
        break;
    case QCOW2_CLUSTER_UNALLOCATED:
        /* how many empty clusters ? */
-        c = count_contiguous_clusters_by_type(nb_clusters, &l2_table[l2_index],
-                                              QCOW2_CLUSTER_UNALLOCATED);
+        c = count_contiguous_free_clusters(nb_clusters, &l2_table[l2_index]);
        *cluster_offset = 0;
        break;
    case QCOW2_CLUSTER_NORMAL:
@@ -589,18 +579,13 @@ int qcow2_get_cluster_offset(BlockDriverState *bs, uint64_t offset,

    qcow2_cache_put(bs, s->l2_table_cache, (void**) &l2_table);

-    bytes_available = (int64_t)c * s->cluster_size;
+    nb_available = (c * s->cluster_sectors);

 out:
-    if (bytes_available > bytes_needed) {
-        bytes_available = bytes_needed;
-    }
+    if (nb_available > nb_needed)
+        nb_available = nb_needed;

-    /* bytes_available <= bytes_needed <= *bytes + offset_in_cluster;
-     * subtracting offset_in_cluster will therefore definitely yield something
-     * not exceeding UINT_MAX */
-    assert(bytes_available - offset_in_cluster <= UINT_MAX);
-    *bytes = bytes_available - offset_in_cluster;
+    *num = nb_available - index_in_cluster;

    return ret;

@@ -624,13 +609,13 @@ static int get_cluster_table(BlockDriverState *bs, uint64_t offset,
                             uint64_t **new_l2_table,
                             int *new_l2_index)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    unsigned int l2_index;
    uint64_t l1_index, l2_offset;
    uint64_t *l2_table = NULL;
    int ret;

-    /* seek to the l2 offset in the l1 table */
+    /* seek the the l2 offset in the l1 table */

    l1_index = offset >> (s->l2_bits + s->cluster_bits);
    if (l1_index >= s->l1_size) {
@@ -698,7 +683,7 @@ uint64_t qcow2_alloc_compressed_cluster_offset(BlockDriverState *bs,
                                               uint64_t offset,
                                               int compressed_size)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    int l2_index, ret;
    uint64_t *l2_table;
    int64_t cluster_offset;
@@ -743,15 +728,17 @@ uint64_t qcow2_alloc_compressed_cluster_offset(BlockDriverState *bs,

 static int perform_cow(BlockDriverState *bs, QCowL2Meta *m, Qcow2COWRegion *r)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    int ret;

-    if (r->nb_bytes == 0) {
+    if (r->nb_sectors == 0) {
        return 0;
    }

    qemu_co_mutex_unlock(&s->lock);
-    ret = do_perform_cow(bs, m->offset, m->alloc_offset, r->offset, r->nb_bytes);
+    ret = copy_sectors(bs, m->offset / BDRV_SECTOR_SIZE, m->alloc_offset,
+                       r->offset / BDRV_SECTOR_SIZE,
+                       r->offset / BDRV_SECTOR_SIZE + r->nb_sectors);
    qemu_co_mutex_lock(&s->lock);

    if (ret < 0) {
@@ -770,7 +757,7 @@ static int perform_cow(BlockDriverState *bs, QCowL2Meta *m, Qcow2COWRegion *r)

 int qcow2_alloc_cluster_link_l2(BlockDriverState *bs, QCowL2Meta *m)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    int i, j = 0, l2_index, ret;
    uint64_t *old_cluster, *l2_table;
    uint64_t cluster_offset = m->alloc_offset;
@@ -813,14 +800,13 @@ int qcow2_alloc_cluster_link_l2(BlockDriverState *bs, QCowL2Meta *m)
    assert(l2_index + m->nb_clusters <= s->l2_size);
    for (i = 0; i < m->nb_clusters; i++) {
        /* if two concurrent writes happen to the same unallocated cluster
-         * each write allocates separate cluster and writes data concurrently.
-         * The first one to complete updates l2 table with pointer to its
-         * cluster the second one has to do RMW (which is done above by
-         * perform_cow()), update l2 table with its cluster pointer and free
-         * old cluster. This is what this loop does */
-        if (l2_table[l2_index + i] != 0) {
+	 * each write allocates separate cluster and writes data concurrently.
+	 * The first one to complete updates l2 table with pointer to its
+	 * cluster the second one has to do RMW (which is done above by
+	 * copy_sectors()), update l2 table with its cluster pointer and free
+	 * old cluster. This is what this loop does */
+        if(l2_table[l2_index + i] != 0)
            old_cluster[j++] = l2_table[l2_index + i];
-        }

        l2_table[l2_index + i] = cpu_to_be64((cluster_offset +
                    (i << s->cluster_bits)) | QCOW_OFLAG_COPIED);
@@ -831,6 +817,7 @@ int qcow2_alloc_cluster_link_l2(BlockDriverState *bs, QCowL2Meta *m)

    /*
     * If this was a COW, we need to decrease the refcount of the old cluster.
+     * Also flush bs->file to get the right order for L2 and refcount update.
     *
     * Don't discard clusters that reach a refcount of 0 (e.g. compressed
     * clusters), the next write will reuse them anyway.
@@ -853,7 +840,7 @@ err:
 * write, but require COW to be performed (this includes yet unallocated space,
 * which must copy from the backing file)
 */
-static int count_cow_clusters(BDRVQcow2State *s, int nb_clusters,
+static int count_cow_clusters(BDRVQcowState *s, int nb_clusters,
    uint64_t *l2_table, int l2_index)
 {
    int i;
@@ -899,7 +886,7 @@ out:
 static int handle_dependencies(BlockDriverState *bs, uint64_t guest_offset,
    uint64_t *cur_bytes, QCowL2Meta **m)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    QCowL2Meta *old_alloc;
    uint64_t bytes = *cur_bytes;

@@ -932,7 +919,9 @@ static int handle_dependencies(BlockDriverState *bs, uint64_t guest_offset,
            if (bytes == 0) {
                /* Wait for the dependency to complete. We need to recheck
                 * the free/allocated clusters when we continue. */
-                qemu_co_queue_wait(&old_alloc->dependent_requests, &s->lock);
+                qemu_co_mutex_unlock(&s->lock);
+                qemu_co_queue_wait(&old_alloc->dependent_requests);
+                qemu_co_mutex_lock(&s->lock);
                return -EAGAIN;
            }
        }
@@ -970,7 +959,7 @@ static int handle_dependencies(BlockDriverState *bs, uint64_t guest_offset,
 static int handle_copied(BlockDriverState *bs, uint64_t guest_offset,
    uint64_t *host_offset, uint64_t *bytes, QCowL2Meta **m)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    int l2_index;
    uint64_t cluster_offset;
    uint64_t *l2_table;
@@ -1078,7 +1067,7 @@ out:
 static int do_alloc_cluster_offset(BlockDriverState *bs, uint64_t guest_offset,
                                   uint64_t *host_offset, uint64_t *nb_clusters)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;

    trace_qcow2_do_alloc_clusters_offset(qemu_coroutine_self(), guest_offset,
                                         *host_offset, *nb_clusters);
@@ -1126,7 +1115,7 @@ static int do_alloc_cluster_offset(BlockDriverState *bs, uint64_t guest_offset,
 static int handle_alloc(BlockDriverState *bs, uint64_t guest_offset,
    uint64_t *host_offset, uint64_t *bytes, QCowL2Meta **m)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    int l2_index;
    uint64_t *l2_table;
    uint64_t entry;
@@ -1200,20 +1189,25 @@ static int handle_alloc(BlockDriverState *bs, uint64_t guest_offset,
    /*
     * Save info needed for meta data update.
     *
-     * requested_bytes: Number of bytes from the start of the first
+     * requested_sectors: Number of sectors from the start of the first
     * newly allocated cluster to the end of the (possibly shortened
     * before) write request.
     *
-     * avail_bytes: Number of bytes from the start of the first
+     * avail_sectors: Number of sectors from the start of the first
     * newly allocated to the end of the last newly allocated cluster.
     *
-     * nb_bytes: The number of bytes from the start of the first
+     * nb_sectors: The number of sectors from the start of the first
     * newly allocated cluster to the end of the area that the write
     * request actually writes to (excluding COW at the end)
     */
-    uint64_t requested_bytes = *bytes + offset_into_cluster(s, guest_offset);
-    int avail_bytes = MIN(INT_MAX, nb_clusters << s->cluster_bits);
-    int nb_bytes = MIN(requested_bytes, avail_bytes);
+    int requested_sectors =
+        (*bytes + offset_into_cluster(s, guest_offset))
+        >> BDRV_SECTOR_BITS;
+    int avail_sectors = nb_clusters
+                        << (s->cluster_bits - BDRV_SECTOR_BITS);
+    int alloc_n_start = offset_into_cluster(s, guest_offset)
+                        >> BDRV_SECTOR_BITS;
+    int nb_sectors = MIN(requested_sectors, avail_sectors);
    QCowL2Meta *old_m = *m;

    *m = g_malloc0(sizeof(**m));
@@ -1224,21 +1218,23 @@ static int handle_alloc(BlockDriverState *bs, uint64_t guest_offset,
        .alloc_offset   = alloc_cluster_offset,
        .offset         = start_of_cluster(s, guest_offset),
        .nb_clusters    = nb_clusters,
+        .nb_available   = nb_sectors,

        .cow_start = {
            .offset     = 0,
-            .nb_bytes   = offset_into_cluster(s, guest_offset),
+            .nb_sectors = alloc_n_start,
        },
        .cow_end = {
-            .offset     = nb_bytes,
-            .nb_bytes   = avail_bytes - nb_bytes,
+            .offset     = nb_sectors * BDRV_SECTOR_SIZE,
+            .nb_sectors = avail_sectors - nb_sectors,
        },
    };
    qemu_co_queue_init(&(*m)->dependent_requests);
    QLIST_INSERT_HEAD(&s->cluster_allocs, *m, next_in_flight);

    *host_offset = alloc_cluster_offset + offset_into_cluster(s, guest_offset);
-    *bytes = MIN(*bytes, nb_bytes - offset_into_cluster(s, guest_offset));
+    *bytes = MIN(*bytes, (nb_sectors * BDRV_SECTOR_SIZE)
+                         - offset_into_cluster(s, guest_offset));
    assert(*bytes != 0);

    return 1;
@@ -1270,20 +1266,21 @@ fail:
 * Return 0 on success and -errno in error cases
 */
 int qcow2_alloc_cluster_offset(BlockDriverState *bs, uint64_t offset,
-                               unsigned int *bytes, uint64_t *host_offset,
-                               QCowL2Meta **m)
+    int *num, uint64_t *host_offset, QCowL2Meta **m)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    uint64_t start, remaining;
    uint64_t cluster_offset;
    uint64_t cur_bytes;
    int ret;

-    trace_qcow2_alloc_clusters_offset(qemu_coroutine_self(), offset, *bytes);
+    trace_qcow2_alloc_clusters_offset(qemu_coroutine_self(), offset, *num);
+
+    assert((offset & ~BDRV_SECTOR_MASK) == 0);

 again:
    start = offset;
-    remaining = *bytes;
+    remaining = (uint64_t)*num << BDRV_SECTOR_BITS;
    cluster_offset = 0;
    *host_offset = 0;
    cur_bytes = 0;
@@ -1369,8 +1366,8 @@ again:
        }
    }

-    *bytes -= remaining;
-    assert(*bytes > 0);
+    *num -= remaining >> BDRV_SECTOR_BITS;
+    assert(*num > 0);
    assert(*host_offset != 0);

    return 0;
@@ -1405,7 +1402,7 @@ static int decompress_buffer(uint8_t *out_buf, int out_buf_size,

 int qcow2_decompress_cluster(BlockDriverState *bs, uint64_t cluster_offset)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    int ret, csize, nb_csectors, sector_offset;
    uint64_t coffset;

@@ -1415,8 +1412,7 @@ int qcow2_decompress_cluster(BlockDriverState *bs, uint64_t cluster_offset)
        sector_offset = coffset & 511;
        csize = nb_csectors * 512 - sector_offset;
        BLKDBG_EVENT(bs->file, BLKDBG_READ_COMPRESSED);
-        ret = bdrv_read(bs->file, coffset >> 9, s->cluster_data,
-                        nb_csectors);
+        ret = bdrv_read(bs->file, coffset >> 9, s->cluster_data, nb_csectors);
        if (ret < 0) {
            return ret;
        }
@@ -1438,7 +1434,7 @@ static int discard_single_l2(BlockDriverState *bs, uint64_t offset,
                             uint64_t nb_clusters, enum qcow2_discard_type type,
                             bool full_discard)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    uint64_t *l2_table;
    int l2_index;
    int ret;
@@ -1473,7 +1469,7 @@ static int discard_single_l2(BlockDriverState *bs, uint64_t offset,
         */
        switch (qcow2_get_cluster_type(old_l2_entry)) {
            case QCOW2_CLUSTER_UNALLOCATED:
-                if (full_discard || !bs->backing) {
+                if (full_discard || !bs->backing_hd) {
                    continue;
                }
                break;
@@ -1512,17 +1508,19 @@ static int discard_single_l2(BlockDriverState *bs, uint64_t offset,
 int qcow2_discard_clusters(BlockDriverState *bs, uint64_t offset,
    int nb_sectors, enum qcow2_discard_type type, bool full_discard)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    uint64_t end_offset;
    uint64_t nb_clusters;
    int ret;

    end_offset = offset + (nb_sectors << BDRV_SECTOR_BITS);

-    /* The caller must cluster-align start; round end down except at EOF */
-    assert(QEMU_IS_ALIGNED(offset, s->cluster_size));
-    if (end_offset != bs->total_sectors * BDRV_SECTOR_SIZE) {
-        end_offset = start_of_cluster(s, end_offset);
+    /* Round start up and end down */
+    offset = align_offset(offset, s->cluster_size);
+    end_offset = start_of_cluster(s, end_offset);
+
+    if (offset > end_offset) {
+        return 0;
    }

    nb_clusters = size_to_clusters(s, end_offset - offset);
@@ -1554,9 +1552,9 @@ fail:
 * clusters.
 */
 static int zero_single_l2(BlockDriverState *bs, uint64_t offset,
-                          uint64_t nb_clusters, int flags)
+                          uint64_t nb_clusters)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    uint64_t *l2_table;
    int l2_index;
    int ret;
@@ -1578,7 +1576,7 @@ static int zero_single_l2(BlockDriverState *bs, uint64_t offset,

        /* Update L2 entries */
        qcow2_cache_entry_mark_dirty(bs, s->l2_table_cache, l2_table);
-        if (old_offset & QCOW_OFLAG_COMPRESSED || flags & BDRV_REQ_MAY_UNMAP) {
+        if (old_offset & QCOW_OFLAG_COMPRESSED) {
            l2_table[l2_index + i] = cpu_to_be64(QCOW_OFLAG_ZERO);
            qcow2_free_any_clusters(bs, old_offset, 1, QCOW2_DISCARD_REQUEST);
        } else {
@@ -1591,10 +1589,9 @@ static int zero_single_l2(BlockDriverState *bs, uint64_t offset,
    return nb_clusters;
 }

-int qcow2_zero_clusters(BlockDriverState *bs, uint64_t offset, int nb_sectors,
-                        int flags)
+int qcow2_zero_clusters(BlockDriverState *bs, uint64_t offset, int nb_sectors)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    uint64_t nb_clusters;
    int ret;

@@ -1609,7 +1606,7 @@ int qcow2_zero_clusters(BlockDriverState *bs, uint64_t offset, int nb_sectors,
    s->cache_discards = true;

    while (nb_clusters > 0) {
-        ret = zero_single_l2(bs, offset, nb_clusters, flags);
+        ret = zero_single_l2(bs, offset, nb_clusters);
        if (ret < 0) {
            goto fail;
        }
@@ -1637,10 +1634,9 @@ fail:
 static int expand_zero_clusters_in_l1(BlockDriverState *bs, uint64_t *l1_table,
                                      int l1_size, int64_t *visited_l1_entries,
                                      int64_t l1_entries,
-                                      BlockDriverAmendStatusCB *status_cb,
-                                      void *cb_opaque)
+                                      BlockDriverAmendStatusCB *status_cb)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    bool is_active_l1 = (l1_table == s->l1_table);
    uint64_t *l2_table = NULL;
    int ret;
@@ -1649,7 +1645,7 @@ static int expand_zero_clusters_in_l1(BlockDriverState *bs, uint64_t *l1_table,
    if (!is_active_l1) {
        /* inactive L2 tables require a buffer to be stored in when loading
         * them from disk */
-        l2_table = qemu_try_blockalign(bs->file->bs, s->cluster_size);
+        l2_table = qemu_try_blockalign(bs->file, s->cluster_size);
        if (l2_table == NULL) {
            return -ENOMEM;
        }
@@ -1664,7 +1660,7 @@ static int expand_zero_clusters_in_l1(BlockDriverState *bs, uint64_t *l1_table,
            /* unallocated */
            (*visited_l1_entries)++;
            if (status_cb) {
-                status_cb(bs, *visited_l1_entries, l1_entries, cb_opaque);
+                status_cb(bs, *visited_l1_entries, l1_entries);
            }
            continue;
        }
@@ -1684,7 +1680,7 @@ static int expand_zero_clusters_in_l1(BlockDriverState *bs, uint64_t *l1_table,
        } else {
            /* load inactive L2 tables from disk */
            ret = bdrv_read(bs->file, l2_offset / BDRV_SECTOR_SIZE,
-                            (void *)l2_table, s->cluster_sectors);
+                    (void *)l2_table, s->cluster_sectors);
        }
        if (ret < 0) {
            goto fail;
@@ -1707,7 +1703,7 @@ static int expand_zero_clusters_in_l1(BlockDriverState *bs, uint64_t *l1_table,
            }

            if (!preallocated) {
-                if (!bs->backing) {
+                if (!bs->backing_hd) {
                    /* not backed; therefore we can simply deallocate the
                     * cluster */
                    l2_table[j] = 0;
@@ -1758,7 +1754,8 @@ static int expand_zero_clusters_in_l1(BlockDriverState *bs, uint64_t *l1_table,
                goto fail;
            }

-            ret = bdrv_pwrite_zeroes(bs->file, offset, s->cluster_size, 0);
+            ret = bdrv_write_zeroes(bs->file, offset / BDRV_SECTOR_SIZE,
+                                    s->cluster_sectors, 0);
            if (ret < 0) {
                if (!preallocated) {
                    qcow2_free_clusters(bs, offset, s->cluster_size,
@@ -1791,7 +1788,7 @@ static int expand_zero_clusters_in_l1(BlockDriverState *bs, uint64_t *l1_table,
                }

                ret = bdrv_write(bs->file, l2_offset / BDRV_SECTOR_SIZE,
-                                 (void *)l2_table, s->cluster_sectors);
+                        (void *)l2_table, s->cluster_sectors);
                if (ret < 0) {
                    goto fail;
                }
@@ -1800,7 +1797,7 @@ static int expand_zero_clusters_in_l1(BlockDriverState *bs, uint64_t *l1_table,

        (*visited_l1_entries)++;
        if (status_cb) {
-            status_cb(bs, *visited_l1_entries, l1_entries, cb_opaque);
+            status_cb(bs, *visited_l1_entries, l1_entries);
        }
    }

@@ -1824,10 +1821,9 @@ fail:
 * qcow2 version which doesn't yet support metadata zero clusters.
 */
 int qcow2_expand_zero_clusters(BlockDriverState *bs,
-                               BlockDriverAmendStatusCB *status_cb,
-                               void *cb_opaque)
+                               BlockDriverAmendStatusCB *status_cb)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    uint64_t *l1_table = NULL;
    int64_t l1_entries = 0, visited_l1_entries = 0;
    int ret;
@@ -1842,7 +1838,7 @@ int qcow2_expand_zero_clusters(BlockDriverState *bs,

    ret = expand_zero_clusters_in_l1(bs, s->l1_table, s->l1_size,
                                     &visited_l1_entries, l1_entries,
-                                     status_cb, cb_opaque);
+                                     status_cb);
    if (ret < 0) {
        goto fail;
    }
@@ -1860,14 +1856,13 @@ int qcow2_expand_zero_clusters(BlockDriverState *bs,
    }

    for (i = 0; i < s->nb_snapshots; i++) {
-        int l1_sectors = DIV_ROUND_UP(s->snapshots[i].l1_size *
-                                      sizeof(uint64_t), BDRV_SECTOR_SIZE);
+        int l1_sectors = (s->snapshots[i].l1_size * sizeof(uint64_t) +
+                BDRV_SECTOR_SIZE - 1) / BDRV_SECTOR_SIZE;

        l1_table = g_realloc(l1_table, l1_sectors * BDRV_SECTOR_SIZE);

-        ret = bdrv_read(bs->file,
-                        s->snapshots[i].l1_table_offset / BDRV_SECTOR_SIZE,
-                        (void *)l1_table, l1_sectors);
+        ret = bdrv_read(bs->file, s->snapshots[i].l1_table_offset /
+                BDRV_SECTOR_SIZE, (void *)l1_table, l1_sectors);
        if (ret < 0) {
            goto fail;
        }
@@ -1878,7 +1873,7 @@ int qcow2_expand_zero_clusters(BlockDriverState *bs,

        ret = expand_zero_clusters_in_l1(bs, l1_table, s->snapshots[i].l1_size,
                                         &visited_l1_entries, l1_entries,
-                                         status_cb, cb_opaque);
+                                         status_cb);
        if (ret < 0) {
            goto fail;
        }
@@ -22,13 +22,10 @@
 * THE SOFTWARE.
 */

-#include "qemu/osdep.h"
-#include "qapi/error.h"
 #include "qemu-common.h"
 #include "block/block_int.h"
 #include "block/qcow2.h"
 #include "qemu/range.h"
-#include "qemu/bswap.h"

 static int64_t alloc_clusters_noref(BlockDriverState *bs, uint64_t size);
 static int QEMU_WARN_UNUSED_RESULT update_refcount(BlockDriverState *bs,
@@ -83,19 +80,9 @@ static Qcow2SetRefcountFunc *const set_refcount_funcs[] = {
 /*********************************************************/
 /* refcount handling */

-static void update_max_refcount_table_index(BDRVQcow2State *s)
-{
-    unsigned i = s->refcount_table_size - 1;
-    while (i > 0 && (s->refcount_table[i] & REFT_OFFSET_MASK) == 0) {
-        i--;
-    }
-    /* Set s->max_refcount_table_index to the index of the last used entry */
-    s->max_refcount_table_index = i;
-}
-
 int qcow2_refcount_init(BlockDriverState *bs)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    unsigned int refcount_table_size2, i;
    int ret;

@@ -121,7 +108,6 @@ int qcow2_refcount_init(BlockDriverState *bs)
        }
        for(i = 0; i < s->refcount_table_size; i++)
            be64_to_cpus(&s->refcount_table[i]);
-        update_max_refcount_table_index(s);
    }
    return 0;
 fail:
@@ -130,7 +116,7 @@ int qcow2_refcount_init(BlockDriverState *bs)

 void qcow2_refcount_close(BlockDriverState *bs)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    g_free(s->refcount_table);
 }

@@ -228,11 +214,14 @@ static int load_refcount_block(BlockDriverState *bs,
                               int64_t refcount_block_offset,
                               void **refcount_block)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
+    int ret;

    BLKDBG_EVENT(bs->file, BLKDBG_REFBLOCK_LOAD);
-    return qcow2_cache_get(bs, s->refcount_block_cache, refcount_block_offset,
-                           refcount_block);
+    ret = qcow2_cache_get(bs, s->refcount_block_cache, refcount_block_offset,
+        refcount_block);
+
+    return ret;
 }

 /*
@@ -242,7 +231,7 @@ static int load_refcount_block(BlockDriverState *bs,
 int qcow2_get_refcount(BlockDriverState *bs, int64_t cluster_index,
                       uint64_t *refcount)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    uint64_t refcount_table_index, block_index;
    int64_t refcount_block_offset;
    int ret;
@@ -285,7 +274,7 @@ int qcow2_get_refcount(BlockDriverState *bs, int64_t cluster_index,
 * Rounds the refcount table size up to avoid growing the table for each single
 * refcount block that is allocated.
 */
-static unsigned int next_refcount_table_size(BDRVQcow2State *s,
+static unsigned int next_refcount_table_size(BDRVQcowState *s,
    unsigned int min_size)
 {
    unsigned int min_clusters = (min_size >> (s->cluster_bits - 3)) + 1;
@@ -301,7 +290,7 @@ static unsigned int next_refcount_table_size(BDRVQcow2State *s,


 /* Checks if two offsets are described by the same refcount block */
-static int in_same_refcount_block(BDRVQcow2State *s, uint64_t offset_a,
+static int in_same_refcount_block(BDRVQcowState *s, uint64_t offset_a,
    uint64_t offset_b)
 {
    uint64_t block_a = offset_a >> (s->cluster_bits + s->refcount_block_bits);
@@ -319,7 +308,7 @@ static int in_same_refcount_block(BDRVQcow2State *s, uint64_t offset_a,
 static int alloc_refcount_block(BlockDriverState *bs,
                                int64_t cluster_index, void **refcount_block)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    unsigned int refcount_table_index;
    int ret;

@@ -450,10 +439,6 @@ static int alloc_refcount_block(BlockDriverState *bs,
        }

        s->refcount_table[refcount_table_index] = new_block;
-        /* If there's a hole in s->refcount_table then it can happen
-         * that refcount_table_index < s->max_refcount_table_index */
-        s->max_refcount_table_index =
-            MAX(s->max_refcount_table_index, refcount_table_index);

        /* The new refcount block may be where the caller intended to put its
         * data, so let it restart the search. */
@@ -502,12 +487,14 @@ static int alloc_refcount_block(BlockDriverState *bs,
        uint64_t table_clusters =
            size_to_clusters(s, table_size * sizeof(uint64_t));
        blocks_clusters = 1 +
-            DIV_ROUND_UP(table_clusters, s->refcount_block_size);
+            ((table_clusters + s->refcount_block_size - 1)
+            / s->refcount_block_size);
        uint64_t meta_clusters = table_clusters + blocks_clusters;

        last_table_size = table_size;
        table_size = next_refcount_table_size(s, blocks_used +
-            DIV_ROUND_UP(meta_clusters, s->refcount_block_size));
+            ((meta_clusters + s->refcount_block_size - 1)
+            / s->refcount_block_size));

    } while (last_table_size != table_size);

@@ -573,16 +560,12 @@ static int alloc_refcount_block(BlockDriverState *bs,
    }

    /* Hook up the new refcount table in the qcow2 header */
-    struct QEMU_PACKED {
-        uint64_t d64;
-        uint32_t d32;
-    } data;
-    data.d64 = cpu_to_be64(table_offset);
-    data.d32 = cpu_to_be32(table_clusters);
+    uint8_t data[12];
+    cpu_to_be64w((uint64_t*)data, table_offset);
+    cpu_to_be32w((uint32_t*)(data + 8), table_clusters);
    BLKDBG_EVENT(bs->file, BLKDBG_REFBLOCK_ALLOC_SWITCH_TABLE);
-    ret = bdrv_pwrite_sync(bs->file,
-                           offsetof(QCowHeader, refcount_table_offset),
-                           &data, sizeof(data));
+    ret = bdrv_pwrite_sync(bs->file, offsetof(QCowHeader, refcount_table_offset),
+        data, sizeof(data));
    if (ret < 0) {
        goto fail_table;
    }
@@ -595,7 +578,6 @@ static int alloc_refcount_block(BlockDriverState *bs,
    s->refcount_table = new_table;
    s->refcount_table_size = table_size;
    s->refcount_table_offset = table_offset;
-    update_max_refcount_table_index(s);

    /* Free old table. */
    qcow2_free_clusters(bs, old_table_offset, old_table_size * sizeof(uint64_t),
@@ -623,7 +605,7 @@ fail_block:

 void qcow2_process_discards(BlockDriverState *bs, int ret)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    Qcow2DiscardRegion *d, *next;

    QTAILQ_FOREACH_SAFE(d, &s->discards, next, next) {
@@ -631,7 +613,9 @@ void qcow2_process_discards(BlockDriverState *bs, int ret)

        /* Discard is optional, ignore the return value */
        if (ret >= 0) {
-            bdrv_pdiscard(bs->file->bs, d->offset, d->bytes);
+            bdrv_discard(bs->file,
+                         d->offset >> BDRV_SECTOR_BITS,
+                         d->bytes >> BDRV_SECTOR_BITS);
        }

        g_free(d);
@@ -641,7 +625,7 @@ void qcow2_process_discards(BlockDriverState *bs, int ret)
 static void update_refcount_discard(BlockDriverState *bs,
                                    uint64_t offset, uint64_t length)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    Qcow2DiscardRegion *d, *p, *next;

    QTAILQ_FOREACH(d, &s->discards, next) {
@@ -698,7 +682,7 @@ static int QEMU_WARN_UNUSED_RESULT update_refcount(BlockDriverState *bs,
                                                   bool decrease,
                                                   enum qcow2_discard_type type)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    int64_t start, last, cluster_offset;
    void *refcount_block = NULL;
    int64_t old_table_index = -1;
@@ -809,7 +793,7 @@ int qcow2_update_cluster_refcount(BlockDriverState *bs,
                                  uint64_t addend, bool decrease,
                                  enum qcow2_discard_type type)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    int ret;

    ret = update_refcount(bs, cluster_index << s->cluster_bits, 1, addend,
@@ -831,7 +815,7 @@ int qcow2_update_cluster_refcount(BlockDriverState *bs,
 /* return < 0 if error */
 static int64_t alloc_clusters_noref(BlockDriverState *bs, uint64_t size)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    uint64_t i, nb_clusters, refcount;
    int ret;

@@ -894,7 +878,7 @@ int64_t qcow2_alloc_clusters(BlockDriverState *bs, uint64_t size)
 int64_t qcow2_alloc_clusters_at(BlockDriverState *bs, uint64_t offset,
                                int64_t nb_clusters)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    uint64_t cluster_index, refcount;
    uint64_t i;
    int ret;
@@ -932,7 +916,7 @@ int64_t qcow2_alloc_clusters_at(BlockDriverState *bs, uint64_t offset,
   contiguous sectors. size must be <= cluster_size */
 int64_t qcow2_alloc_bytes(BlockDriverState *bs, int size)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    int64_t offset;
    size_t free_in_cluster;
    int ret;
@@ -965,17 +949,11 @@ int64_t qcow2_alloc_bytes(BlockDriverState *bs, int size)

            if (!offset || ROUND_UP(offset, s->cluster_size) != new_cluster) {
                offset = new_cluster;
-                free_in_cluster = s->cluster_size;
-            } else {
-                free_in_cluster += s->cluster_size;
            }
        }

        assert(offset);
        ret = update_refcount(bs, offset, size, 1, false, QCOW2_DISCARD_NEVER);
-        if (ret < 0) {
-            offset = 0;
-        }
    } while (ret == -EAGAIN);
    if (ret < 0) {
        return ret;
@@ -1014,7 +992,7 @@ void qcow2_free_clusters(BlockDriverState *bs,
 void qcow2_free_any_clusters(BlockDriverState *bs, uint64_t l2_entry,
                             int nb_clusters, enum qcow2_discard_type type)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;

    switch (qcow2_get_cluster_type(l2_entry)) {
    case QCOW2_CLUSTER_COMPRESSED:
@@ -1058,7 +1036,7 @@ void qcow2_free_any_clusters(BlockDriverState *bs, uint64_t l2_entry,
 int qcow2_update_snapshot_refcount(BlockDriverState *bs,
    int64_t l1_table_offset, int l1_size, int addend)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    uint64_t *l1_table, *l2_table, l2_offset, offset, l1_size2, refcount;
    bool l1_allocated = false;
    int64_t old_offset, old_l2_offset;
@@ -1237,8 +1215,7 @@ fail:
            cpu_to_be64s(&l1_table[i]);
        }

-        ret = bdrv_pwrite_sync(bs->file, l1_table_offset,
-                               l1_table, l1_size2);
+        ret = bdrv_pwrite_sync(bs->file, l1_table_offset, l1_table, l1_size2);

        for (i = 0; i < l1_size; i++) {
            be64_to_cpus(&l1_table[i]);
@@ -1256,7 +1233,7 @@ fail:
 /* refcount checking functions */


-static uint64_t refcount_array_byte_size(BDRVQcow2State *s, uint64_t entries)
+static size_t refcount_array_byte_size(BDRVQcowState *s, uint64_t entries)
 {
    /* This assertion holds because there is no way we can address more than
     * 2^(64 - 9) clusters at once (with cluster size 512 = 2^9, and because
@@ -1279,7 +1256,7 @@ static uint64_t refcount_array_byte_size(BDRVQcow2State *s, uint64_t entries)
 * refcount array buffer will be aligned to a cluster boundary, and the newly
 * allocated area will be zeroed.
 */
-static int realloc_refcount_array(BDRVQcow2State *s, void **array,
+static int realloc_refcount_array(BDRVQcowState *s, void **array,
                                  int64_t *size, int64_t new_size)
 {
    int64_t old_byte_size, new_byte_size;
@@ -1321,7 +1298,7 @@ static int realloc_refcount_array(BDRVQcow2State *s, void **array,
 /*
 * Increases the refcount for a range of clusters in a given refcount table.
 * This is used to construct a temporary refcount table out of L1 and L2 tables
- * which can be compared to the refcount table saved in the image.
+ * which can be compared the the refcount table saved in the image.
 *
 * Modifies the number of errors in res.
 */
@@ -1331,7 +1308,7 @@ static int inc_refcounts(BlockDriverState *bs,
                         int64_t *refcount_table_size,
                         int64_t offset, int64_t size)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    uint64_t start, last, cluster_offset, k, refcount;
    int ret;

@@ -1357,9 +1334,6 @@ static int inc_refcounts(BlockDriverState *bs,
        if (refcount == s->refcount_max) {
            fprintf(stderr, "ERROR: overflow cluster offset=0x%" PRIx64
                    "\n", cluster_offset);
-            fprintf(stderr, "Use qemu-img amend to increase the refcount entry "
-                    "width or qemu-img convert to create a clean copy if the "
-                    "image cannot be opened for writing\n");
            res->corruptions++;
            continue;
        }
@@ -1387,7 +1361,7 @@ static int check_refcounts_l2(BlockDriverState *bs, BdrvCheckResult *res,
                              int64_t *refcount_table_size, int64_t l2_offset,
                              int flags)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    uint64_t *l2_table, l2_entry;
    uint64_t next_contiguous_offset = 0;
    int i, l2_size, nb_csectors, ret;
@@ -1507,7 +1481,7 @@ static int check_refcounts_l1(BlockDriverState *bs,
                              int64_t l1_table_offset, int l1_size,
                              int flags)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    uint64_t *l1_table = NULL, l2_offset, l1_size2;
    int i, ret;

@@ -1584,7 +1558,7 @@ fail:
 static int check_oflag_copied(BlockDriverState *bs, BdrvCheckResult *res,
                              BdrvCheckMode fix)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    uint64_t *l2_table = qemu_blockalign(bs, s->cluster_size);
    int ret;
    uint64_t refcount;
@@ -1678,8 +1652,7 @@ static int check_oflag_copied(BlockDriverState *bs, BdrvCheckResult *res,
                goto fail;
            }

-            ret = bdrv_pwrite(bs->file, l2_offset, l2_table,
-                              s->cluster_size);
+            ret = bdrv_pwrite(bs->file, l2_offset, l2_table, s->cluster_size);
            if (ret < 0) {
                fprintf(stderr, "ERROR: Could not write L2 table: %s\n",
                        strerror(-ret));
@@ -1704,7 +1677,7 @@ static int check_refblocks(BlockDriverState *bs, BdrvCheckResult *res,
                           BdrvCheckMode fix, bool *rebuild,
                           void **refcount_table, int64_t *nb_clusters)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    int64_t i, size;
    int ret;

@@ -1728,20 +1701,17 @@ static int check_refblocks(BlockDriverState *bs, BdrvCheckResult *res,

            if (fix & BDRV_FIX_ERRORS) {
                int64_t new_nb_clusters;
-                Error *local_err = NULL;

                if (offset > INT64_MAX - s->cluster_size) {
                    ret = -EINVAL;
                    goto resize_fail;
                }

-                ret = bdrv_truncate(bs->file, offset + s->cluster_size,
-                                    &local_err);
+                ret = bdrv_truncate(bs->file, offset + s->cluster_size);
                if (ret < 0) {
-                    error_report_err(local_err);
                    goto resize_fail;
                }
-                size = bdrv_getlength(bs->file->bs);
+                size = bdrv_getlength(bs->file);
                if (size < 0) {
                    ret = size;
                    goto resize_fail;
@@ -1810,7 +1780,7 @@ static int calculate_refcounts(BlockDriverState *bs, BdrvCheckResult *res,
                               BdrvCheckMode fix, bool *rebuild,
                               void **refcount_table, int64_t *nb_clusters)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    int64_t i;
    QCowSnapshot *sn;
    int ret;
@@ -1874,7 +1844,7 @@ static void compare_refcounts(BlockDriverState *bs, BdrvCheckResult *res,
                              int64_t *highest_cluster,
                              void *refcount_table, int64_t nb_clusters)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    int64_t i;
    uint64_t refcount1, refcount2;
    int ret;
@@ -1951,7 +1921,7 @@ static int64_t alloc_clusters_imrt(BlockDriverState *bs,
                                   int64_t *imrt_nb_clusters,
                                   int64_t *first_free_cluster)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    int64_t cluster = *first_free_cluster, i;
    bool first_gap = true;
    int contiguous_free_clusters;
@@ -2021,7 +1991,7 @@ static int rebuild_refcount_structure(BlockDriverState *bs,
                                      void **refcount_table,
                                      int64_t *nb_clusters)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    int64_t first_free_cluster = 0, reftable_offset = -1, cluster = 0;
    int64_t refblock_offset, refblock_start, refblock_index;
    uint32_t reftable_size = 0;
@@ -2172,11 +2142,12 @@ write_refblocks:
    }

    /* Enter new reftable into the image header */
-    reftable_offset_and_clusters.reftable_offset = cpu_to_be64(reftable_offset);
-    reftable_offset_and_clusters.reftable_clusters =
-        cpu_to_be32(size_to_clusters(s, reftable_size * sizeof(uint64_t)));
-    ret = bdrv_pwrite_sync(bs->file,
-                           offsetof(QCowHeader, refcount_table_offset),
+    cpu_to_be64w(&reftable_offset_and_clusters.reftable_offset,
+                 reftable_offset);
+    cpu_to_be32w(&reftable_offset_and_clusters.reftable_clusters,
+                 size_to_clusters(s, reftable_size * sizeof(uint64_t)));
+    ret = bdrv_pwrite_sync(bs->file, offsetof(QCowHeader,
+                                              refcount_table_offset),
                           &reftable_offset_and_clusters,
                           sizeof(reftable_offset_and_clusters));
    if (ret < 0) {
@@ -2190,7 +2161,6 @@ write_refblocks:
    s->refcount_table = on_disk_reftable;
    s->refcount_table_offset = reftable_offset;
    s->refcount_table_size = reftable_size;
-    update_max_refcount_table_index(s);

    return 0;

@@ -2208,14 +2178,14 @@ fail:
 int qcow2_check_refcounts(BlockDriverState *bs, BdrvCheckResult *res,
                          BdrvCheckMode fix)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    BdrvCheckResult pre_compare_res;
    int64_t size, highest_cluster, nb_clusters;
    void *refcount_table = NULL;
    bool rebuild = false;
    int ret;

-    size = bdrv_getlength(bs->file->bs);
+    size = bdrv_getlength(bs->file);
    if (size < 0) {
        res->check_errors++;
        return size;
@@ -2345,7 +2315,7 @@ fail:
 int qcow2_check_metadata_overlap(BlockDriverState *bs, int ign, int64_t offset,
                                 int64_t size)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    int chk = s->overlap_check & ~ign;
    int i, j;

@@ -2403,11 +2373,7 @@ int qcow2_check_metadata_overlap(BlockDriverState *bs, int ign, int64_t offset,
    }

    if ((chk & QCOW2_OL_REFCOUNT_BLOCK) && s->refcount_table) {
-        unsigned last_entry = s->max_refcount_table_index;
-        assert(last_entry < s->refcount_table_size);
-        assert(last_entry + 1 == s->refcount_table_size ||
-               (s->refcount_table[last_entry + 1] & REFT_OFFSET_MASK) == 0);
-        for (i = 0; i <= last_entry; i++) {
+        for (i = 0; i < s->refcount_table_size; i++) {
            if ((s->refcount_table[i] & REFT_OFFSET_MASK) &&
                overlaps_with(s->refcount_table[i] & REFT_OFFSET_MASK,
                s->cluster_size)) {
@@ -2489,451 +2455,3 @@ int qcow2_pre_write_overlap_check(BlockDriverState *bs, int ign, int64_t offset,

    return 0;
 }
-
-/* A pointer to a function of this type is given to walk_over_reftable(). That
- * function will create refblocks and pass them to a RefblockFinishOp once they
- * are completed (@refblock). @refblock_empty is set if the refblock is
- * completely empty.
- *
- * Along with the refblock, a corresponding reftable entry is passed, in the
- * reftable @reftable (which may be reallocated) at @reftable_index.
- *
- * @allocated should be set to true if a new cluster has been allocated.
- */
-typedef int (RefblockFinishOp)(BlockDriverState *bs, uint64_t **reftable,
-                               uint64_t reftable_index, uint64_t *reftable_size,
-                               void *refblock, bool refblock_empty,
-                               bool *allocated, Error **errp);
-
-/**
- * This "operation" for walk_over_reftable() allocates the refblock on disk (if
- * it is not empty) and inserts its offset into the new reftable. The size of
- * this new reftable is increased as required.
- */
-static int alloc_refblock(BlockDriverState *bs, uint64_t **reftable,
-                          uint64_t reftable_index, uint64_t *reftable_size,
-                          void *refblock, bool refblock_empty, bool *allocated,
-                          Error **errp)
-{
-    BDRVQcow2State *s = bs->opaque;
-    int64_t offset;
-
-    if (!refblock_empty && reftable_index >= *reftable_size) {
-        uint64_t *new_reftable;
-        uint64_t new_reftable_size;
-
-        new_reftable_size = ROUND_UP(reftable_index + 1,
-                                     s->cluster_size / sizeof(uint64_t));
-        if (new_reftable_size > QCOW_MAX_REFTABLE_SIZE / sizeof(uint64_t)) {
-            error_setg(errp,
-                       "This operation would make the refcount table grow "
-                       "beyond the maximum size supported by QEMU, aborting");
-            return -ENOTSUP;
-        }
-
-        new_reftable = g_try_realloc(*reftable, new_reftable_size *
-                                                sizeof(uint64_t));
-        if (!new_reftable) {
-            error_setg(errp, "Failed to increase reftable buffer size");
-            return -ENOMEM;
-        }
-
-        memset(new_reftable + *reftable_size, 0,
-               (new_reftable_size - *reftable_size) * sizeof(uint64_t));
-
-        *reftable      = new_reftable;
-        *reftable_size = new_reftable_size;
-    }
-
-    if (!refblock_empty && !(*reftable)[reftable_index]) {
-        offset = qcow2_alloc_clusters(bs, s->cluster_size);
-        if (offset < 0) {
-            error_setg_errno(errp, -offset, "Failed to allocate refblock");
-            return offset;
-        }
-        (*reftable)[reftable_index] = offset;
-        *allocated = true;
-    }
-
-    return 0;
-}
-
-/**
- * This "operation" for walk_over_reftable() writes the refblock to disk at the
- * offset specified by the new reftable's entry. It does not modify the new
- * reftable or change any refcounts.
- */
-static int flush_refblock(BlockDriverState *bs, uint64_t **reftable,
-                          uint64_t reftable_index, uint64_t *reftable_size,
-                          void *refblock, bool refblock_empty, bool *allocated,
-                          Error **errp)
-{
-    BDRVQcow2State *s = bs->opaque;
-    int64_t offset;
-    int ret;
-
-    if (reftable_index < *reftable_size && (*reftable)[reftable_index]) {
-        offset = (*reftable)[reftable_index];
-
-        ret = qcow2_pre_write_overlap_check(bs, 0, offset, s->cluster_size);
-        if (ret < 0) {
-            error_setg_errno(errp, -ret, "Overlap check failed");
-            return ret;
-        }
-
-        ret = bdrv_pwrite(bs->file, offset, refblock, s->cluster_size);
-        if (ret < 0) {
-            error_setg_errno(errp, -ret, "Failed to write refblock");
-            return ret;
-        }
-    } else {
-        assert(refblock_empty);
-    }
-
-    return 0;
-}
-
-/**
- * This function walks over the existing reftable and every referenced refblock;
- * if @new_set_refcount is non-NULL, it is called for every refcount entry to
- * create an equal new entry in the passed @new_refblock. Once that
- * @new_refblock is completely filled, @operation will be called.
- *
- * @status_cb and @cb_opaque are used for the amend operation's status callback.
- * @index is the index of the walk_over_reftable() calls and @total is the total
- * number of walk_over_reftable() calls per amend operation. Both are used for
- * calculating the parameters for the status callback.
- *
- * @allocated is set to true if a new cluster has been allocated.
- */
-static int walk_over_reftable(BlockDriverState *bs, uint64_t **new_reftable,
-                              uint64_t *new_reftable_index,
-                              uint64_t *new_reftable_size,
-                              void *new_refblock, int new_refblock_size,
-                              int new_refcount_bits,
-                              RefblockFinishOp *operation, bool *allocated,
-                              Qcow2SetRefcountFunc *new_set_refcount,
-                              BlockDriverAmendStatusCB *status_cb,
-                              void *cb_opaque, int index, int total,
-                              Error **errp)
-{
-    BDRVQcow2State *s = bs->opaque;
-    uint64_t reftable_index;
-    bool new_refblock_empty = true;
-    int refblock_index;
-    int new_refblock_index = 0;
-    int ret;
-
-    for (reftable_index = 0; reftable_index < s->refcount_table_size;
-         reftable_index++)
-    {
-        uint64_t refblock_offset = s->refcount_table[reftable_index]
-                                 & REFT_OFFSET_MASK;
-
-        status_cb(bs, (uint64_t)index * s->refcount_table_size + reftable_index,
-                  (uint64_t)total * s->refcount_table_size, cb_opaque);
-
-        if (refblock_offset) {
-            void *refblock;
-
-            if (offset_into_cluster(s, refblock_offset)) {
-                qcow2_signal_corruption(bs, true, -1, -1, "Refblock offset %#"
-                                        PRIx64 " unaligned (reftable index: %#"
-                                        PRIx64 ")", refblock_offset,
-                                        reftable_index);
-                error_setg(errp,
-                           "Image is corrupt (unaligned refblock offset)");
-                return -EIO;
-            }
-
-            ret = qcow2_cache_get(bs, s->refcount_block_cache, refblock_offset,
-                                  &refblock);
-            if (ret < 0) {
-                error_setg_errno(errp, -ret, "Failed to retrieve refblock");
-                return ret;
-            }
-
-            for (refblock_index = 0; refblock_index < s->refcount_block_size;
-                 refblock_index++)
-            {
-                uint64_t refcount;
-
-                if (new_refblock_index >= new_refblock_size) {
-                    /* new_refblock is now complete */
-                    ret = operation(bs, new_reftable, *new_reftable_index,
-                                    new_reftable_size, new_refblock,
-                                    new_refblock_empty, allocated, errp);
-                    if (ret < 0) {
-                        qcow2_cache_put(bs, s->refcount_block_cache, &refblock);
-                        return ret;
-                    }
-
-                    (*new_reftable_index)++;
-                    new_refblock_index = 0;
-                    new_refblock_empty = true;
-                }
-
-                refcount = s->get_refcount(refblock, refblock_index);
-                if (new_refcount_bits < 64 && refcount >> new_refcount_bits) {
-                    uint64_t offset;
-
-                    qcow2_cache_put(bs, s->refcount_block_cache, &refblock);
-
-                    offset = ((reftable_index << s->refcount_block_bits)
-                              + refblock_index) << s->cluster_bits;
-
-                    error_setg(errp, "Cannot decrease refcount entry width to "
-                               "%i bits: Cluster at offset %#" PRIx64 " has a "
-                               "refcount of %" PRIu64, new_refcount_bits,
-                               offset, refcount);
-                    return -EINVAL;
-                }
-
-                if (new_set_refcount) {
-                    new_set_refcount(new_refblock, new_refblock_index++,
-                                     refcount);
-                } else {
-                    new_refblock_index++;
-                }
-                new_refblock_empty = new_refblock_empty && refcount == 0;
-            }
-
-            qcow2_cache_put(bs, s->refcount_block_cache, &refblock);
-        } else {
-            /* No refblock means every refcount is 0 */
-            for (refblock_index = 0; refblock_index < s->refcount_block_size;
-                 refblock_index++)
-            {
-                if (new_refblock_index >= new_refblock_size) {
-                    /* new_refblock is now complete */
-                    ret = operation(bs, new_reftable, *new_reftable_index,
-                                    new_reftable_size, new_refblock,
-                                    new_refblock_empty, allocated, errp);
-                    if (ret < 0) {
-                        return ret;
-                    }
-
-                    (*new_reftable_index)++;
-                    new_refblock_index = 0;
-                    new_refblock_empty = true;
-                }
-
-                if (new_set_refcount) {
-                    new_set_refcount(new_refblock, new_refblock_index++, 0);
-                } else {
-                    new_refblock_index++;
-                }
-            }
-        }
-    }
-
-    if (new_refblock_index > 0) {
-        /* Complete the potentially existing partially filled final refblock */
-        if (new_set_refcount) {
-            for (; new_refblock_index < new_refblock_size;
-                 new_refblock_index++)
-            {
-                new_set_refcount(new_refblock, new_refblock_index, 0);
-            }
-        }
-
-        ret = operation(bs, new_reftable, *new_reftable_index,
-                        new_reftable_size, new_refblock, new_refblock_empty,
-                        allocated, errp);
-        if (ret < 0) {
-            return ret;
-        }
-
-        (*new_reftable_index)++;
-    }
-
-    status_cb(bs, (uint64_t)(index + 1) * s->refcount_table_size,
-              (uint64_t)total * s->refcount_table_size, cb_opaque);
-
-    return 0;
-}
-
-int qcow2_change_refcount_order(BlockDriverState *bs, int refcount_order,
-                                BlockDriverAmendStatusCB *status_cb,
-                                void *cb_opaque, Error **errp)
-{
-    BDRVQcow2State *s = bs->opaque;
-    Qcow2GetRefcountFunc *new_get_refcount;
-    Qcow2SetRefcountFunc *new_set_refcount;
-    void *new_refblock = qemu_blockalign(bs->file->bs, s->cluster_size);
-    uint64_t *new_reftable = NULL, new_reftable_size = 0;
-    uint64_t *old_reftable, old_reftable_size, old_reftable_offset;
-    uint64_t new_reftable_index = 0;
-    uint64_t i;
-    int64_t new_reftable_offset = 0, allocated_reftable_size = 0;
-    int new_refblock_size, new_refcount_bits = 1 << refcount_order;
-    int old_refcount_order;
-    int walk_index = 0;
-    int ret;
-    bool new_allocation;
-
-    assert(s->qcow_version >= 3);
-    assert(refcount_order >= 0 && refcount_order <= 6);
-
-    /* see qcow2_open() */
-    new_refblock_size = 1 << (s->cluster_bits - (refcount_order - 3));
-
-    new_get_refcount = get_refcount_funcs[refcount_order];
-    new_set_refcount = set_refcount_funcs[refcount_order];
-
-
-    do {
-        int total_walks;
-
-        new_allocation = false;
-
-        /* At least we have to do this walk and the one which writes the
-         * refblocks; also, at least we have to do this loop here at least
-         * twice (normally), first to do the allocations, and second to
-         * determine that everything is correctly allocated, this then makes
-         * three walks in total */
-        total_walks = MAX(walk_index + 2, 3);
-
-        /* First, allocate the structures so they are present in the refcount
-         * structures */
-        ret = walk_over_reftable(bs, &new_reftable, &new_reftable_index,
-                                 &new_reftable_size, NULL, new_refblock_size,
-                                 new_refcount_bits, &alloc_refblock,
-                                 &new_allocation, NULL, status_cb, cb_opaque,
-                                 walk_index++, total_walks, errp);
-        if (ret < 0) {
-            goto done;
-        }
-
-        new_reftable_index = 0;
-
-        if (new_allocation) {
-            if (new_reftable_offset) {
-                qcow2_free_clusters(bs, new_reftable_offset,
-                                    allocated_reftable_size * sizeof(uint64_t),
-                                    QCOW2_DISCARD_NEVER);
-            }
-
-            new_reftable_offset = qcow2_alloc_clusters(bs, new_reftable_size *
-                                                           sizeof(uint64_t));
-            if (new_reftable_offset < 0) {
-                error_setg_errno(errp, -new_reftable_offset,
-                                 "Failed to allocate the new reftable");
-                ret = new_reftable_offset;
-                goto done;
-            }
-            allocated_reftable_size = new_reftable_size;
-        }
-    } while (new_allocation);
-
-    /* Second, write the new refblocks */
-    ret = walk_over_reftable(bs, &new_reftable, &new_reftable_index,
-                             &new_reftable_size, new_refblock,
-                             new_refblock_size, new_refcount_bits,
-                             &flush_refblock, &new_allocation, new_set_refcount,
-                             status_cb, cb_opaque, walk_index, walk_index + 1,
-                             errp);
-    if (ret < 0) {
-        goto done;
-    }
-    assert(!new_allocation);
-
-
-    /* Write the new reftable */
-    ret = qcow2_pre_write_overlap_check(bs, 0, new_reftable_offset,
-                                        new_reftable_size * sizeof(uint64_t));
-    if (ret < 0) {
-        error_setg_errno(errp, -ret, "Overlap check failed");
-        goto done;
-    }
-
-    for (i = 0; i < new_reftable_size; i++) {
-        cpu_to_be64s(&new_reftable[i]);
-    }
-
-    ret = bdrv_pwrite(bs->file, new_reftable_offset, new_reftable,
-                      new_reftable_size * sizeof(uint64_t));
-
-    for (i = 0; i < new_reftable_size; i++) {
-        be64_to_cpus(&new_reftable[i]);
-    }
-
-    if (ret < 0) {
-        error_setg_errno(errp, -ret, "Failed to write the new reftable");
-        goto done;
-    }
-
-
-    /* Empty the refcount cache */
-    ret = qcow2_cache_flush(bs, s->refcount_block_cache);
-    if (ret < 0) {
-        error_setg_errno(errp, -ret, "Failed to flush the refblock cache");
-        goto done;
-    }
-
-    /* Update the image header to point to the new reftable; this only updates
-     * the fields which are relevant to qcow2_update_header(); other fields
-     * such as s->refcount_table or s->refcount_bits stay stale for now
-     * (because we have to restore everything if qcow2_update_header() fails) */
-    old_refcount_order  = s->refcount_order;
-    old_reftable_size   = s->refcount_table_size;
-    old_reftable_offset = s->refcount_table_offset;
-
-    s->refcount_order        = refcount_order;
-    s->refcount_table_size   = new_reftable_size;
-    s->refcount_table_offset = new_reftable_offset;
-
-    ret = qcow2_update_header(bs);
-    if (ret < 0) {
-        s->refcount_order        = old_refcount_order;
-        s->refcount_table_size   = old_reftable_size;
-        s->refcount_table_offset = old_reftable_offset;
-        error_setg_errno(errp, -ret, "Failed to update the qcow2 header");
-        goto done;
-    }
-
-    /* Now update the rest of the in-memory information */
-    old_reftable = s->refcount_table;
-    s->refcount_table = new_reftable;
-    update_max_refcount_table_index(s);
-
-    s->refcount_bits = 1 << refcount_order;
-    s->refcount_max = UINT64_C(1) << (s->refcount_bits - 1);
-    s->refcount_max += s->refcount_max - 1;
-
-    s->refcount_block_bits = s->cluster_bits - (refcount_order - 3);
-    s->refcount_block_size = 1 << s->refcount_block_bits;
-
-    s->get_refcount = new_get_refcount;
-    s->set_refcount = new_set_refcount;
-
-    /* For cleaning up all old refblocks and the old reftable below the "done"
-     * label */
-    new_reftable        = old_reftable;
-    new_reftable_size   = old_reftable_size;
-    new_reftable_offset = old_reftable_offset;
-
-done:
-    if (new_reftable) {
-        /* On success, new_reftable actually points to the old reftable (and
-         * new_reftable_size is the old reftable's size); but that is just
-         * fine */
-        for (i = 0; i < new_reftable_size; i++) {
-            uint64_t offset = new_reftable[i] & REFT_OFFSET_MASK;
-            if (offset) {
-                qcow2_free_clusters(bs, offset, s->cluster_size,
-                                    QCOW2_DISCARD_OTHER);
-            }
-        }
-        g_free(new_reftable);
-
-        if (new_reftable_offset > 0) {
-            qcow2_free_clusters(bs, new_reftable_offset,
-                                new_reftable_size * sizeof(uint64_t),
-                                QCOW2_DISCARD_OTHER);
-        }
-    }
-
-    qemu_vfree(new_refblock);
-    return ret;
-}
@@ -22,17 +22,14 @@
 * THE SOFTWARE.
 */

-#include "qemu/osdep.h"
-#include "qapi/error.h"
+#include "qemu-common.h"
 #include "block/block_int.h"
 #include "block/qcow2.h"
-#include "qemu/bswap.h"
 #include "qemu/error-report.h"
-#include "qemu/cutils.h"

 void qcow2_free_snapshots(BlockDriverState *bs)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    int i;

    for(i = 0; i < s->nb_snapshots; i++) {
@@ -46,7 +43,7 @@ void qcow2_free_snapshots(BlockDriverState *bs)

 int qcow2_read_snapshots(BlockDriverState *bs)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    QCowSnapshotHeader h;
    QCowSnapshotExtraData extra;
    QCowSnapshot *sn;
@@ -139,7 +136,7 @@ fail:
 /* add at the end of the file a new list of snapshots */
 static int qcow2_write_snapshots(BlockDriverState *bs)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    QCowSnapshot *sn;
    QCowSnapshotHeader h;
    QCowSnapshotExtraData extra;
@@ -281,7 +278,7 @@ fail:
 static void find_new_snapshot_id(BlockDriverState *bs,
                                 char *id_str, int id_str_size)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    QCowSnapshot *sn;
    int i;
    unsigned long id, id_max = 0;
@@ -299,7 +296,7 @@ static int find_snapshot_by_id_and_name(BlockDriverState *bs,
                                        const char *id,
                                        const char *name)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    int i;

    if (id && name) {
@@ -341,7 +338,7 @@ static int find_snapshot_by_id_or_name(BlockDriverState *bs,
 /* if no id is provided, a new one is constructed */
 int qcow2_snapshot_create(BlockDriverState *bs, QEMUSnapshotInfo *sn_info)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    QCowSnapshot *new_snapshot_list = NULL;
    QCowSnapshot *old_snapshot_list = NULL;
    QCowSnapshot sn1, *sn = &sn1;
@@ -464,7 +461,7 @@ fail:
 /* copy the snapshot 'snapshot_name' into the current disk image */
 int qcow2_snapshot_goto(BlockDriverState *bs, const char *snapshot_id)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    QCowSnapshot *sn;
    int i, snapshot_index;
    int cur_l1_bytes, sn_l1_bytes;
@@ -512,8 +509,7 @@ int qcow2_snapshot_goto(BlockDriverState *bs, const char *snapshot_id)
        goto fail;
    }

-    ret = bdrv_pread(bs->file, sn->l1_table_offset,
-                     sn_l1_table, sn_l1_bytes);
+    ret = bdrv_pread(bs->file, sn->l1_table_offset, sn_l1_table, sn_l1_bytes);
    if (ret < 0) {
        goto fail;
    }
@@ -591,7 +587,7 @@ int qcow2_snapshot_delete(BlockDriverState *bs,
                          const char *name,
                          Error **errp)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    QCowSnapshot sn;
    int snapshot_index, ret;

@@ -654,7 +650,7 @@ int qcow2_snapshot_delete(BlockDriverState *bs,

 int qcow2_snapshot_list(BlockDriverState *bs, QEMUSnapshotInfo **psn_tab)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    QEMUSnapshotInfo *sn_tab, *sn_info;
    QCowSnapshot *sn;
    int i;
@@ -687,7 +683,7 @@ int qcow2_snapshot_load_tmp(BlockDriverState *bs,
                            Error **errp)
 {
    int i, snapshot_index;
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    QCowSnapshot *sn;
    uint64_t *new_l1_table;
    int new_l1_bytes;
@@ -710,14 +706,13 @@ int qcow2_snapshot_load_tmp(BlockDriverState *bs,
        return -EFBIG;
    }
    new_l1_bytes = sn->l1_size * sizeof(uint64_t);
-    new_l1_table = qemu_try_blockalign(bs->file->bs,
+    new_l1_table = qemu_try_blockalign(bs->file,
                                       align_offset(new_l1_bytes, 512));
    if (new_l1_table == NULL) {
        return -ENOMEM;
    }

-    ret = bdrv_pread(bs->file, sn->l1_table_offset,
-                     new_l1_table, new_l1_bytes);
+    ret = bdrv_pread(bs->file, sn->l1_table_offset, new_l1_table, new_l1_bytes);
    if (ret < 0) {
        error_setg(errp, "Failed to read l1 table for snapshot");
        qemu_vfree(new_l1_table);
@@ -26,7 +26,7 @@
 #define BLOCK_QCOW2_H

 #include "crypto/cipher.h"
-#include "qemu/coroutine.h"
+#include "block/coroutine.h"

 //#define DEBUG_ALLOC
 //#define DEBUG_ALLOC2
@@ -96,7 +96,6 @@
 #define QCOW2_OPT_CACHE_SIZE "cache-size"
 #define QCOW2_OPT_L2_CACHE_SIZE "l2-cache-size"
 #define QCOW2_OPT_REFCOUNT_CACHE_SIZE "refcount-cache-size"
-#define QCOW2_OPT_CACHE_CLEAN_INTERVAL "cache-clean-interval"

 typedef struct QCowHeader {
    uint32_t magic;
@@ -222,7 +221,7 @@ typedef uint64_t Qcow2GetRefcountFunc(const void *refcount_array,
 typedef void Qcow2SetRefcountFunc(void *refcount_array,
                                  uint64_t index, uint64_t value);

-typedef struct BDRVQcow2State {
+typedef struct BDRVQcowState {
    int cluster_bits;
    int cluster_size;
    int cluster_sectors;
@@ -240,8 +239,6 @@ typedef struct BDRVQcow2State {

    Qcow2Cache* l2_table_cache;
    Qcow2Cache* refcount_block_cache;
-    QEMUTimer *cache_clean_timer;
-    unsigned cache_clean_interval;

    uint8_t *cluster_cache;
    uint8_t *cluster_data;
@@ -251,7 +248,6 @@ typedef struct BDRVQcow2State {
    uint64_t *refcount_table;
    uint64_t refcount_table_offset;
    uint32_t refcount_table_size;
-    uint32_t max_refcount_table_index; /* Last used entry in refcount_table */
    uint64_t free_cluster_index;
    uint64_t free_byte_offset;

@@ -294,7 +290,9 @@ typedef struct BDRVQcow2State {
     * override) */
    char *image_backing_file;
    char *image_backing_format;
-} BDRVQcow2State;
+} BDRVQcowState;
+
+struct QCowAIOCB;

 typedef struct Qcow2COWRegion {
    /**
@@ -303,8 +301,8 @@ typedef struct Qcow2COWRegion {
     */
    uint64_t    offset;

-    /** Number of bytes to copy */
-    int         nb_bytes;
+    /** Number of sectors to copy */
+    int         nb_sectors;
 } Qcow2COWRegion;

 /**
@@ -319,6 +317,12 @@ typedef struct QCowL2Meta
    /** Host offset of the first newly allocated cluster */
    uint64_t alloc_offset;

+    /**
+     * Number of sectors from the start of the first allocated cluster to
+     * the end of the (possibly shortened) request
+     */
+    int nb_available;
+
    /** Number of newly allocated clusters */
    int nb_clusters;

@@ -398,28 +402,28 @@ typedef enum QCow2MetadataOverlap {

 #define REFT_OFFSET_MASK 0xfffffffffffffe00ULL

-static inline int64_t start_of_cluster(BDRVQcow2State *s, int64_t offset)
+static inline int64_t start_of_cluster(BDRVQcowState *s, int64_t offset)
 {
    return offset & ~(s->cluster_size - 1);
 }

-static inline int64_t offset_into_cluster(BDRVQcow2State *s, int64_t offset)
+static inline int64_t offset_into_cluster(BDRVQcowState *s, int64_t offset)
 {
    return offset & (s->cluster_size - 1);
 }

-static inline uint64_t size_to_clusters(BDRVQcow2State *s, uint64_t size)
+static inline uint64_t size_to_clusters(BDRVQcowState *s, uint64_t size)
 {
    return (size + (s->cluster_size - 1)) >> s->cluster_bits;
 }

-static inline int64_t size_to_l1(BDRVQcow2State *s, int64_t size)
+static inline int64_t size_to_l1(BDRVQcowState *s, int64_t size)
 {
    int shift = s->cluster_bits + s->l2_bits;
    return (size + (1ULL << shift) - 1) >> shift;
 }

-static inline int offset_to_l2_index(BDRVQcow2State *s, int64_t offset)
+static inline int offset_to_l2_index(BDRVQcowState *s, int64_t offset)
 {
    return (offset >> s->cluster_bits) & (s->l2_size - 1);
 }
@@ -430,12 +434,12 @@ static inline int64_t align_offset(int64_t offset, int n)
    return offset;
 }

-static inline int64_t qcow2_vm_state_offset(BDRVQcow2State *s)
+static inline int64_t qcow2_vm_state_offset(BDRVQcowState *s)
 {
    return (int64_t)s->l1_vm_state_index << (s->cluster_bits + s->l2_bits);
 }

-static inline uint64_t qcow2_max_refcount_clusters(BDRVQcow2State *s)
+static inline uint64_t qcow2_max_refcount_clusters(BDRVQcowState *s)
 {
    return QCOW_MAX_REFTABLE_SIZE >> s->cluster_bits;
 }
@@ -454,7 +458,7 @@ static inline int qcow2_get_cluster_type(uint64_t l2_entry)
 }

 /* Check whether refcounts are eager or lazy */
-static inline bool qcow2_need_accurate_refcounts(BDRVQcow2State *s)
+static inline bool qcow2_need_accurate_refcounts(BDRVQcowState *s)
 {
    return !(s->incompatible_features & QCOW2_INCOMPAT_DIRTY);
 }
@@ -466,7 +470,8 @@ static inline uint64_t l2meta_cow_start(QCowL2Meta *m)

 static inline uint64_t l2meta_cow_end(QCowL2Meta *m)
 {
-    return m->offset + m->cow_end.offset + m->cow_end.nb_bytes;
+    return m->offset + m->cow_end.offset
+        + (m->cow_end.nb_sectors << BDRV_SECTOR_BITS);
 }

 static inline uint64_t refcount_diff(uint64_t r1, uint64_t r2)
@@ -474,6 +479,8 @@ static inline uint64_t refcount_diff(uint64_t r1, uint64_t r2)
    return r1 > r2 ? r1 - r2 : r2 - r1;
 }

+// FIXME Need qcow2_ prefix to global functions
+
 /* qcow2.c functions */
 int qcow2_backing_read1(BlockDriverState *bs, QEMUIOVector *qiov,
                  int64_t sector_num, int nb_sectors);
@@ -521,24 +528,20 @@ int qcow2_check_metadata_overlap(BlockDriverState *bs, int ign, int64_t offset,
 int qcow2_pre_write_overlap_check(BlockDriverState *bs, int ign, int64_t offset,
                                  int64_t size);

-int qcow2_change_refcount_order(BlockDriverState *bs, int refcount_order,
-                                BlockDriverAmendStatusCB *status_cb,
-                                void *cb_opaque, Error **errp);
-
 /* qcow2-cluster.c functions */
 int qcow2_grow_l1_table(BlockDriverState *bs, uint64_t min_size,
                        bool exact_size);
 int qcow2_write_l1_entry(BlockDriverState *bs, int l1_index);
+void qcow2_l2_cache_reset(BlockDriverState *bs);
 int qcow2_decompress_cluster(BlockDriverState *bs, uint64_t cluster_offset);
-int qcow2_encrypt_sectors(BDRVQcow2State *s, int64_t sector_num,
+int qcow2_encrypt_sectors(BDRVQcowState *s, int64_t sector_num,
                          uint8_t *out_buf, const uint8_t *in_buf,
                          int nb_sectors, bool enc, Error **errp);

 int qcow2_get_cluster_offset(BlockDriverState *bs, uint64_t offset,
-                             unsigned int *bytes, uint64_t *cluster_offset);
+    int *num, uint64_t *cluster_offset);
 int qcow2_alloc_cluster_offset(BlockDriverState *bs, uint64_t offset,
-                               unsigned int *bytes, uint64_t *host_offset,
-                               QCowL2Meta **m);
+    int *num, uint64_t *host_offset, QCowL2Meta **m);
 uint64_t qcow2_alloc_compressed_cluster_offset(BlockDriverState *bs,
                                         uint64_t offset,
                                         int compressed_size);
@@ -546,12 +549,10 @@ uint64_t qcow2_alloc_compressed_cluster_offset(BlockDriverState *bs,
 int qcow2_alloc_cluster_link_l2(BlockDriverState *bs, QCowL2Meta *m);
 int qcow2_discard_clusters(BlockDriverState *bs, uint64_t offset,
    int nb_sectors, enum qcow2_discard_type type, bool full_discard);
-int qcow2_zero_clusters(BlockDriverState *bs, uint64_t offset, int nb_sectors,
-                        int flags);
+int qcow2_zero_clusters(BlockDriverState *bs, uint64_t offset, int nb_sectors);

 int qcow2_expand_zero_clusters(BlockDriverState *bs,
-                               BlockDriverAmendStatusCB *status_cb,
-                               void *cb_opaque);
+                               BlockDriverAmendStatusCB *status_cb);

 /* qcow2-snapshot.c functions */
 int qcow2_snapshot_create(BlockDriverState *bs, QEMUSnapshotInfo *sn_info);
@@ -576,12 +577,10 @@ int qcow2_cache_destroy(BlockDriverState* bs, Qcow2Cache *c);
 void qcow2_cache_entry_mark_dirty(BlockDriverState *bs, Qcow2Cache *c,
     void *table);
 int qcow2_cache_flush(BlockDriverState *bs, Qcow2Cache *c);
-int qcow2_cache_write(BlockDriverState *bs, Qcow2Cache *c);
 int qcow2_cache_set_dependency(BlockDriverState *bs, Qcow2Cache *c,
    Qcow2Cache *dependency);
 void qcow2_cache_depends_on_flush(Qcow2Cache *c);

-void qcow2_cache_clean_unused(BlockDriverState *bs, Qcow2Cache *c);
 int qcow2_cache_empty(BlockDriverState *bs, Qcow2Cache *c);

 int qcow2_cache_get(BlockDriverState *bs, Qcow2Cache *c, uint64_t offset,
@@ -11,7 +11,6 @@
 *
 */

-#include "qemu/osdep.h"
 #include "qed.h"

 typedef struct {
@@ -234,7 +233,8 @@ int qed_check(BDRVQEDState *s, BdrvCheckResult *result, bool fix)
    }

    check.result->bfi.total_clusters =
-        DIV_ROUND_UP(s->header.image_size, s->header.cluster_size);
+        (s->header.image_size + s->header.cluster_size - 1) /
+            s->header.cluster_size;
    ret = qed_check_l1_table(&check, s->l1_table);
    if (ret == 0) {
        /* Only check for leaks if entire image was scanned successfully */
@@ -12,7 +12,6 @@
 *
 */

-#include "qemu/osdep.h"
 #include "qed.h"

 /**
@@ -83,7 +82,6 @@ static void qed_find_cluster_cb(void *opaque, int ret)
    unsigned int index;
    unsigned int n;

-    qed_acquire(s);
    if (ret) {
        goto out;
    }
@@ -110,7 +108,6 @@ static void qed_find_cluster_cb(void *opaque, int ret)

 out:
    find_cluster_cb->cb(find_cluster_cb->opaque, ret, offset, len);
-    qed_release(s);
    g_free(find_cluster_cb);
 }

@@ -11,7 +11,6 @@
 *
 */

-#include "qemu/osdep.h"
 #include "qed.h"

 void *gencb_alloc(size_t len, BlockCompletionFunc *cb, void *opaque)
@@ -50,7 +50,6 @@
 * table will be deleted in favor of the existing cache entry.
 */

-#include "qemu/osdep.h"
 #include "trace.h"
 #include "qed.h"

@@ -12,11 +12,9 @@
 *
 */

-#include "qemu/osdep.h"
 #include "trace.h"
 #include "qemu/sockets.h" /* for EINPROGRESS on Windows */
 #include "qed.h"
-#include "qemu/bswap.h"

 typedef struct {
    GenericCB gencb;
@@ -31,7 +29,6 @@ static void qed_read_table_cb(void *opaque, int ret)
 {
    QEDReadTableCB *read_table_cb = opaque;
    QEDTable *table = read_table_cb->table;
-    BDRVQEDState *s = read_table_cb->s;
    int noffsets = read_table_cb->qiov.size / sizeof(uint64_t);
    int i;

@@ -41,15 +38,13 @@ static void qed_read_table_cb(void *opaque, int ret)
    }

    /* Byteswap offsets */
-    qed_acquire(s);
    for (i = 0; i < noffsets; i++) {
        table->offsets[i] = le64_to_cpu(table->offsets[i]);
    }
-    qed_release(s);

 out:
    /* Completion */
-    trace_qed_read_table_cb(s, read_table_cb->table, ret);
+    trace_qed_read_table_cb(read_table_cb->s, read_table_cb->table, ret);
    gencb_complete(&read_table_cb->gencb, ret);
 }

@@ -87,9 +82,8 @@ typedef struct {
 static void qed_write_table_cb(void *opaque, int ret)
 {
    QEDWriteTableCB *write_table_cb = opaque;
-    BDRVQEDState *s = write_table_cb->s;

-    trace_qed_write_table_cb(s,
+    trace_qed_write_table_cb(write_table_cb->s,
                             write_table_cb->orig_table,
                             write_table_cb->flush,
                             ret);
@@ -101,10 +95,8 @@ static void qed_write_table_cb(void *opaque, int ret)
    if (write_table_cb->flush) {
        /* We still need to flush first */
        write_table_cb->flush = false;
-        qed_acquire(s);
        bdrv_aio_flush(write_table_cb->s->bs, qed_write_table_cb,
                       write_table_cb);
-        qed_release(s);
        return;
    }

@@ -180,7 +172,9 @@ int qed_read_l1_table_sync(BDRVQEDState *s)

    qed_read_table(s, s->header.l1_table_offset,
                   s->l1_table, qed_sync_cb, &ret);
-    BDRV_POLL_WHILE(s->bs, ret == -EINPROGRESS);
+    while (ret == -EINPROGRESS) {
+        aio_poll(bdrv_get_aio_context(s->bs), true);
+    }

    return ret;
 }
@@ -199,7 +193,9 @@ int qed_write_l1_table_sync(BDRVQEDState *s, unsigned int index,
    int ret = -EINPROGRESS;

    qed_write_l1_table(s, index, n, qed_sync_cb, &ret);
-    BDRV_POLL_WHILE(s->bs, ret == -EINPROGRESS);
+    while (ret == -EINPROGRESS) {
+        aio_poll(bdrv_get_aio_context(s->bs), true);
+    }

    return ret;
 }
@@ -219,7 +215,6 @@ static void qed_read_l2_table_cb(void *opaque, int ret)
    CachedL2Table *l2_table = request->l2_table;
    uint64_t l2_offset = read_l2_table_cb->l2_offset;

-    qed_acquire(s);
    if (ret) {
        /* can't trust loaded L2 table anymore */
        qed_unref_l2_cache_entry(l2_table);
@@ -235,7 +230,6 @@ static void qed_read_l2_table_cb(void *opaque, int ret)
        request->l2_table = qed_find_l2_cache_entry(&s->l2_cache, l2_offset);
        assert(request->l2_table != NULL);
    }
-    qed_release(s);

    gencb_complete(&read_l2_table_cb->gencb, ret);
 }
@@ -272,7 +266,9 @@ int qed_read_l2_table_sync(BDRVQEDState *s, QEDRequest *request, uint64_t offset
    int ret = -EINPROGRESS;

    qed_read_l2_table(s, request, offset, qed_sync_cb, &ret);
-    BDRV_POLL_WHILE(s->bs, ret == -EINPROGRESS);
+    while (ret == -EINPROGRESS) {
+        aio_poll(bdrv_get_aio_context(s->bs), true);
+    }

    return ret;
 }
@@ -292,7 +288,9 @@ int qed_write_l2_table_sync(BDRVQEDState *s, QEDRequest *request,
    int ret = -EINPROGRESS;

    qed_write_l2_table(s, request, index, n, flush, qed_sync_cb, &ret);
-    BDRV_POLL_WHILE(s->bs, ret == -EINPROGRESS);
+    while (ret == -EINPROGRESS) {
+        aio_poll(bdrv_get_aio_context(s->bs), true);
+    }

    return ret;
 }
@@ -12,15 +12,11 @@
 *
 */

-#include "qemu/osdep.h"
-#include "qapi/error.h"
 #include "qemu/timer.h"
-#include "qemu/bswap.h"
 #include "trace.h"
 #include "qed.h"
 #include "qapi/qmp/qerror.h"
 #include "migration/migration.h"
-#include "sysemu/block-backend.h"

 static const AIOCBInfo qed_aiocb_info = {
    .aiocb_size         = sizeof(QEDAIOCB),
@@ -143,7 +139,8 @@ static void qed_write_header(BDRVQEDState *s, BlockCompletionFunc cb,
     * them, and write back.
     */

-    int nsectors = DIV_ROUND_UP(sizeof(QEDHeader), BDRV_SECTOR_SIZE);
+    int nsectors = (sizeof(QEDHeader) + BDRV_SECTOR_SIZE - 1) /
+                   BDRV_SECTOR_SIZE;
    size_t len = nsectors * BDRV_SECTOR_SIZE;
    QEDWriteHeaderCB *write_header_cb = gencb_alloc(sizeof(*write_header_cb),
                                                    cb, opaque);
@@ -218,7 +215,7 @@ static bool qed_is_image_size_valid(uint64_t image_size, uint32_t cluster_size,
 *
 * The string is NUL-terminated.
 */
-static int qed_read_string(BdrvChild *file, uint64_t offset, size_t n,
+static int qed_read_string(BlockDriverState *file, uint64_t offset, size_t n,
                           char *buf, size_t buflen)
 {
    int ret;
@@ -273,19 +270,7 @@ static CachedL2Table *qed_new_l2_table(BDRVQEDState *s)
    return l2_table;
 }

-static void qed_aio_next_io(QEDAIOCB *acb, int ret);
-
-static void qed_aio_start_io(QEDAIOCB *acb)
-{
-    qed_aio_next_io(acb, 0);
-}
-
-static void qed_aio_next_io_cb(void *opaque, int ret)
-{
-    QEDAIOCB *acb = opaque;
-
-    qed_aio_next_io(acb, ret);
-}
+static void qed_aio_next_io(void *opaque, int ret);

 static void qed_plug_allocating_write_reqs(BDRVQEDState *s)
 {
@@ -304,7 +289,7 @@ static void qed_unplug_allocating_write_reqs(BDRVQEDState *s)

    acb = QSIMPLEQ_FIRST(&s->allocating_write_reqs);
    if (acb) {
-        qed_aio_start_io(acb);
+        qed_aio_next_io(acb, 0);
    }
 }

@@ -345,22 +330,10 @@ static void qed_need_check_timer_cb(void *opaque)

    trace_qed_need_check_timer_cb(s);

-    qed_acquire(s);
    qed_plug_allocating_write_reqs(s);

    /* Ensure writes are on disk before clearing flag */
-    bdrv_aio_flush(s->bs->file->bs, qed_clear_need_check, s);
-    qed_release(s);
-}
-
-void qed_acquire(BDRVQEDState *s)
-{
-    aio_context_acquire(bdrv_get_aio_context(s->bs));
-}
-
-void qed_release(BDRVQEDState *s)
-{
-    aio_context_release(bdrv_get_aio_context(s->bs));
+    bdrv_aio_flush(s->bs, qed_clear_need_check, s);
 }

 static void qed_start_need_check_timer(BDRVQEDState *s)
@@ -371,7 +344,7 @@ static void qed_start_need_check_timer(BDRVQEDState *s)
     * migration.
     */
    timer_mod(s->need_check_timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) +
-                   NANOSECONDS_PER_SECOND * QED_NEED_CHECK_TIMEOUT);
+                   get_ticks_per_sec() * QED_NEED_CHECK_TIMEOUT);
 }

 /* It's okay to call this multiple times or when no timer is started */
@@ -381,6 +354,12 @@ static void qed_cancel_need_check_timer(BDRVQEDState *s)
    timer_del(s->need_check_timer);
 }

+static void bdrv_qed_rebind(BlockDriverState *bs)
+{
+    BDRVQEDState *s = bs->opaque;
+    s->bs = bs;
+}
+
 static void bdrv_qed_detach_aio_context(BlockDriverState *bs)
 {
    BDRVQEDState *s = bs->opaque;
@@ -402,21 +381,8 @@ static void bdrv_qed_attach_aio_context(BlockDriverState *bs,
    }
 }

-static void bdrv_qed_drain(BlockDriverState *bs)
-{
-    BDRVQEDState *s = bs->opaque;
-
-    /* Fire the timer immediately in order to start doing I/O as soon as the
-     * header is flushed.
-     */
-    if (s->need_check_timer && timer_pending(s->need_check_timer)) {
-        qed_cancel_need_check_timer(s);
-        qed_need_check_timer_cb(s);
-    }
-}
-
-static int bdrv_qed_do_open(BlockDriverState *bs, QDict *options, int flags,
-                            Error **errp)
+static int bdrv_qed_open(BlockDriverState *bs, QDict *options, int flags,
+                         Error **errp)
 {
    BDRVQEDState *s = bs->opaque;
    QEDHeader le_header;
@@ -438,8 +404,11 @@ static int bdrv_qed_do_open(BlockDriverState *bs, QDict *options, int flags,
    }
    if (s->header.features & ~QED_FEATURE_MASK) {
        /* image uses unsupported feature bits */
-        error_setg(errp, "Unsupported QED features: %" PRIx64,
-                   s->header.features & ~QED_FEATURE_MASK);
+        char buf[64];
+        snprintf(buf, sizeof(buf), "%" PRIx64,
+            s->header.features & ~QED_FEATURE_MASK);
+        error_setg(errp, QERR_UNKNOWN_BLOCK_FORMAT_FEATURE,
+                   bdrv_get_device_or_node_name(bs), "QED", buf);
        return -ENOTSUP;
    }
    if (!qed_is_cluster_size_valid(s->header.cluster_size)) {
@@ -447,7 +416,7 @@ static int bdrv_qed_do_open(BlockDriverState *bs, QDict *options, int flags,
    }

    /* Round down file size to the last cluster */
-    file_size = bdrv_getlength(bs->file->bs);
+    file_size = bdrv_getlength(bs->file);
    if (file_size < 0) {
        return file_size;
    }
@@ -502,7 +471,7 @@ static int bdrv_qed_do_open(BlockDriverState *bs, QDict *options, int flags,
     * feature is no longer valid.
     */
    if ((s->header.autoclear_features & ~QED_AUTOCLEAR_FEATURE_MASK) != 0 &&
-        !bdrv_is_read_only(bs->file->bs) && !(flags & BDRV_O_INACTIVE)) {
+        !bdrv_is_read_only(bs->file) && !(flags & BDRV_O_INCOMING)) {
        s->header.autoclear_features &= QED_AUTOCLEAR_FEATURE_MASK;

        ret = qed_write_header_sync(s);
@@ -511,7 +480,7 @@ static int bdrv_qed_do_open(BlockDriverState *bs, QDict *options, int flags,
        }

        /* From here on only known autoclear feature bits are valid */
-        bdrv_flush(bs->file->bs);
+        bdrv_flush(bs->file);
    }

    s->l1_table = qed_alloc_table(s);
@@ -529,8 +498,8 @@ static int bdrv_qed_do_open(BlockDriverState *bs, QDict *options, int flags,
         * potentially inconsistent images to be opened read-only.  This can
         * aid data recovery from an otherwise inconsistent image.
         */
-        if (!bdrv_is_read_only(bs->file->bs) &&
-            !(flags & BDRV_O_INACTIVE)) {
+        if (!bdrv_is_read_only(bs->file) &&
+            !(flags & BDRV_O_INCOMING)) {
            BdrvCheckResult result = {0};

            ret = qed_check(s, &result, true);
@@ -550,23 +519,11 @@ out:
    return ret;
 }

-static int bdrv_qed_open(BlockDriverState *bs, QDict *options, int flags,
-                         Error **errp)
-{
-    bs->file = bdrv_open_child(NULL, options, "file", bs, &child_file,
-                               false, errp);
-    if (!bs->file) {
-        return -EINVAL;
-    }
-
-    return bdrv_qed_do_open(bs, options, flags, errp);
-}
-
 static void bdrv_qed_refresh_limits(BlockDriverState *bs, Error **errp)
 {
    BDRVQEDState *s = bs->opaque;

-    bs->bl.pwrite_zeroes_alignment = s->header.cluster_size;
+    bs->bl.write_zeroes_alignment = s->header.cluster_size >> BDRV_SECTOR_BITS;
 }

 /* We have nothing to do for QED reopen, stubs just return
@@ -584,7 +541,7 @@ static void bdrv_qed_close(BlockDriverState *bs)
    bdrv_qed_detach_aio_context(bs);

    /* Ensure writes reach stable storage */
-    bdrv_flush(bs->file->bs);
+    bdrv_flush(bs->file);

    /* Clean shutdown, no check required on next open */
    if (s->header.features & QED_F_NEED_CHECK) {
@@ -616,7 +573,7 @@ static int qed_create(const char *filename, uint32_t cluster_size,
    size_t l1_size = header.cluster_size * header.table_size;
    Error *local_err = NULL;
    int ret = 0;
-    BlockBackend *blk;
+    BlockDriverState *bs;

    ret = bdrv_create_file(filename, opts, &local_err);
    if (ret < 0) {
@@ -624,18 +581,17 @@ static int qed_create(const char *filename, uint32_t cluster_size,
        return ret;
    }

-    blk = blk_new_open(filename, NULL, NULL,
-                       BDRV_O_RDWR | BDRV_O_RESIZE | BDRV_O_PROTOCOL,
-                       &local_err);
-    if (blk == NULL) {
+    bs = NULL;
+    ret = bdrv_open(&bs, filename, NULL, NULL,
+                    BDRV_O_RDWR | BDRV_O_CACHE_WB | BDRV_O_PROTOCOL, NULL,
+                    &local_err);
+    if (ret < 0) {
        error_propagate(errp, local_err);
-        return -EIO;
+        return ret;
    }

-    blk_set_allow_write_beyond_eof(blk, true);
-
    /* File must start empty and grow, check truncate is supported */
-    ret = blk_truncate(blk, 0, errp);
+    ret = bdrv_truncate(bs, 0);
    if (ret < 0) {
        goto out;
    }
@@ -651,18 +607,18 @@ static int qed_create(const char *filename, uint32_t cluster_size,
    }

    qed_header_cpu_to_le(&header, &le_header);
-    ret = blk_pwrite(blk, 0, &le_header, sizeof(le_header), 0);
+    ret = bdrv_pwrite(bs, 0, &le_header, sizeof(le_header));
    if (ret < 0) {
        goto out;
    }
-    ret = blk_pwrite(blk, sizeof(le_header), backing_file,
-                     header.backing_filename_size, 0);
+    ret = bdrv_pwrite(bs, sizeof(le_header), backing_file,
+                      header.backing_filename_size);
    if (ret < 0) {
        goto out;
    }

    l1_table = g_malloc0(l1_size);
-    ret = blk_pwrite(blk, header.l1_table_offset, l1_table, l1_size, 0);
+    ret = bdrv_pwrite(bs, header.l1_table_offset, l1_table, l1_size);
    if (ret < 0) {
        goto out;
    }
@@ -670,7 +626,7 @@ static int qed_create(const char *filename, uint32_t cluster_size,
    ret = 0; /* success */
 out:
    g_free(l1_table);
-    blk_unref(blk);
+    bdrv_unref(bs);
    return ret;
 }

@@ -730,7 +686,6 @@ typedef struct {
    uint64_t pos;
    int64_t status;
    int *pnum;
-    BlockDriverState **file;
 } QEDIsAllocatedCB;

 static void qed_is_allocated_cb(void *opaque, int ret, uint64_t offset, size_t len)
@@ -742,7 +697,6 @@ static void qed_is_allocated_cb(void *opaque, int ret, uint64_t offset, size_t l
    case QED_CLUSTER_FOUND:
        offset |= qed_offset_into_cluster(s, cb->pos);
        cb->status = BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID | offset;
-        *cb->file = cb->bs->file->bs;
        break;
    case QED_CLUSTER_ZERO:
        cb->status = BDRV_BLOCK_ZERO;
@@ -758,14 +712,13 @@ static void qed_is_allocated_cb(void *opaque, int ret, uint64_t offset, size_t l
    }

    if (cb->co) {
-        aio_co_wake(cb->co);
+        qemu_coroutine_enter(cb->co, NULL);
    }
 }

 static int64_t coroutine_fn bdrv_qed_co_get_block_status(BlockDriverState *bs,
                                                 int64_t sector_num,
-                                                 int nb_sectors, int *pnum,
-                                                 BlockDriverState **file)
+                                                 int nb_sectors, int *pnum)
 {
    BDRVQEDState *s = bs->opaque;
    size_t len = (size_t)nb_sectors * BDRV_SECTOR_SIZE;
@@ -774,7 +727,6 @@ static int64_t coroutine_fn bdrv_qed_co_get_block_status(BlockDriverState *bs,
        .pos = (uint64_t)sector_num * BDRV_SECTOR_SIZE,
        .status = BDRV_BLOCK_OFFSET_MASK,
        .pnum = pnum,
-        .file = file,
    };
    QEDRequest request = { .l2_table = NULL };

@@ -820,8 +772,8 @@ static void qed_read_backing_file(BDRVQEDState *s, uint64_t pos,
    /* If there is a backing file, get its length.  Treat the absence of a
     * backing file like a zero length backing file.
     */
-    if (s->bs->backing) {
-        int64_t l = bdrv_getlength(s->bs->backing->bs);
+    if (s->bs->backing_hd) {
+        int64_t l = bdrv_getlength(s->bs->backing_hd);
        if (l < 0) {
            cb(opaque, l);
            return;
@@ -850,7 +802,7 @@ static void qed_read_backing_file(BDRVQEDState *s, uint64_t pos,
    qemu_iovec_concat(*backing_qiov, qiov, 0, size);

    BLKDBG_EVENT(s->bs->file, BLKDBG_READ_BACKING_AIO);
-    bdrv_aio_readv(s->bs->backing, pos / BDRV_SECTOR_SIZE,
+    bdrv_aio_readv(s->bs->backing_hd, pos / BDRV_SECTOR_SIZE,
                   *backing_qiov, size / BDRV_SECTOR_SIZE, cb, opaque);
 }

@@ -955,17 +907,15 @@ static void qed_update_l2_table(BDRVQEDState *s, QEDTable *table, int index,
 static void qed_aio_complete_bh(void *opaque)
 {
    QEDAIOCB *acb = opaque;
-    BDRVQEDState *s = acb_to_s(acb);
    BlockCompletionFunc *cb = acb->common.cb;
    void *user_opaque = acb->common.opaque;
    int ret = acb->bh_ret;

+    qemu_bh_delete(acb->bh);
    qemu_aio_unref(acb);

    /* Invoke callback */
-    qed_acquire(s);
    cb(user_opaque, ret);
-    qed_release(s);
 }

 static void qed_aio_complete(QEDAIOCB *acb, int ret)
@@ -986,8 +936,9 @@ static void qed_aio_complete(QEDAIOCB *acb, int ret)

    /* Arrange for a bh to invoke the completion function */
    acb->bh_ret = ret;
-    aio_bh_schedule_oneshot(bdrv_get_aio_context(acb->common.bs),
-                            qed_aio_complete_bh, acb);
+    acb->bh = aio_bh_new(bdrv_get_aio_context(acb->common.bs),
+                         qed_aio_complete_bh, acb);
+    qemu_bh_schedule(acb->bh);

    /* Start next allocating write request waiting behind this one.  Note that
     * requests enqueue themselves when they first hit an unallocated cluster
@@ -999,7 +950,7 @@ static void qed_aio_complete(QEDAIOCB *acb, int ret)
        QSIMPLEQ_REMOVE_HEAD(&s->allocating_write_reqs, next);
        acb = QSIMPLEQ_FIRST(&s->allocating_write_reqs);
        if (acb) {
-            qed_aio_start_io(acb);
+            qed_aio_next_io(acb, 0);
        } else if (s->header.features & QED_F_NEED_CHECK) {
            qed_start_need_check_timer(s);
        }
@@ -1024,7 +975,7 @@ static void qed_commit_l2_update(void *opaque, int ret)
    acb->request.l2_table = qed_find_l2_cache_entry(&s->l2_cache, l2_offset);
    assert(acb->request.l2_table != NULL);

-    qed_aio_next_io(acb, ret);
+    qed_aio_next_io(opaque, ret);
 }

 /**
@@ -1072,11 +1023,11 @@ static void qed_aio_write_l2_update(QEDAIOCB *acb, int ret, uint64_t offset)
    if (need_alloc) {
        /* Write out the whole new L2 table */
        qed_write_l2_table(s, &acb->request, 0, s->table_nelems, true,
-                           qed_aio_write_l1_update, acb);
+                            qed_aio_write_l1_update, acb);
    } else {
        /* Write out only the updated part of the L2 table */
        qed_write_l2_table(s, &acb->request, index, acb->cur_nclusters, false,
-                           qed_aio_next_io_cb, acb);
+                            qed_aio_next_io, acb);
    }
    return;

@@ -1104,7 +1055,7 @@ static void qed_aio_write_flush_before_l2_update(void *opaque, int ret)
    QEDAIOCB *acb = opaque;
    BDRVQEDState *s = acb_to_s(acb);

-    if (!bdrv_aio_flush(s->bs->file->bs, qed_aio_write_l2_update_cb, opaque)) {
+    if (!bdrv_aio_flush(s->bs->file, qed_aio_write_l2_update_cb, opaque)) {
        qed_aio_complete(acb, -EIO);
    }
 }
@@ -1128,9 +1079,9 @@ static void qed_aio_write_main(void *opaque, int ret)
    }

    if (acb->find_cluster_ret == QED_CLUSTER_FOUND) {
-        next_fn = qed_aio_next_io_cb;
+        next_fn = qed_aio_next_io;
    } else {
-        if (s->bs->backing) {
+        if (s->bs->backing_hd) {
            next_fn = qed_aio_write_flush_before_l2_update;
        } else {
            next_fn = qed_aio_write_l2_update_cb;
@@ -1188,7 +1139,7 @@ static void qed_aio_write_prefill(void *opaque, int ret)
 static bool qed_should_set_need_check(BDRVQEDState *s)
 {
    /* The flush before L2 update path ensures consistency */
-    if (s->bs->backing) {
+    if (s->bs->backing_hd) {
        return false;
    }

@@ -1241,7 +1192,7 @@ static void qed_aio_write_alloc(QEDAIOCB *acb, size_t len)
    if (acb->flags & QED_AIOCB_ZERO) {
        /* Skip ahead if the clusters are already zero */
        if (acb->find_cluster_ret == QED_CLUSTER_ZERO) {
-            qed_aio_start_io(acb);
+            qed_aio_next_io(acb, 0);
            return;
        }

@@ -1361,18 +1312,18 @@ static void qed_aio_read_data(void *opaque, int ret,
    /* Handle zero cluster and backing file reads */
    if (ret == QED_CLUSTER_ZERO) {
        qemu_iovec_memset(&acb->cur_qiov, 0, 0, acb->cur_qiov.size);
-        qed_aio_start_io(acb);
+        qed_aio_next_io(acb, 0);
        return;
    } else if (ret != QED_CLUSTER_FOUND) {
        qed_read_backing_file(s, acb->cur_pos, &acb->cur_qiov,
-                              &acb->backing_qiov, qed_aio_next_io_cb, acb);
+                              &acb->backing_qiov, qed_aio_next_io, acb);
        return;
    }

    BLKDBG_EVENT(bs->file, BLKDBG_READ_AIO);
    bdrv_aio_readv(bs->file, offset / BDRV_SECTOR_SIZE,
                   &acb->cur_qiov, acb->cur_qiov.size / BDRV_SECTOR_SIZE,
-                   qed_aio_next_io_cb, acb);
+                   qed_aio_next_io, acb);
    return;

 err:
@@ -1382,8 +1333,9 @@ err:
 /**
 * Begin next I/O or complete the request
 */
-static void qed_aio_next_io(QEDAIOCB *acb, int ret)
+static void qed_aio_next_io(void *opaque, int ret)
 {
+    QEDAIOCB *acb = opaque;
    BDRVQEDState *s = acb_to_s(acb);
    QEDFindClusterFunc *io_fn = (acb->flags & QED_AIOCB_WRITE) ?
                                qed_aio_write_data : qed_aio_read_data;
@@ -1439,7 +1391,7 @@ static BlockAIOCB *qed_aio_setup(BlockDriverState *bs,
    qemu_iovec_init(&acb->cur_qiov, qiov->niov);

    /* Start request */
-    qed_aio_start_io(acb);
+    qed_aio_next_io(acb, 0);
    return &acb->common;
 }

@@ -1468,21 +1420,21 @@ typedef struct {
    bool done;
 } QEDWriteZeroesCB;

-static void coroutine_fn qed_co_pwrite_zeroes_cb(void *opaque, int ret)
+static void coroutine_fn qed_co_write_zeroes_cb(void *opaque, int ret)
 {
    QEDWriteZeroesCB *cb = opaque;

    cb->done = true;
    cb->ret = ret;
    if (cb->co) {
-        aio_co_wake(cb->co);
+        qemu_coroutine_enter(cb->co, NULL);
    }
 }

-static int coroutine_fn bdrv_qed_co_pwrite_zeroes(BlockDriverState *bs,
-                                                  int64_t offset,
-                                                  int count,
-                                                  BdrvRequestFlags flags)
+static int coroutine_fn bdrv_qed_co_write_zeroes(BlockDriverState *bs,
+                                                 int64_t sector_num,
+                                                 int nb_sectors,
+                                                 BdrvRequestFlags flags)
 {
    BlockAIOCB *blockacb;
    BDRVQEDState *s = bs->opaque;
@@ -1490,22 +1442,25 @@ static int coroutine_fn bdrv_qed_co_pwrite_zeroes(BlockDriverState *bs,
    QEMUIOVector qiov;
    struct iovec iov;

-    /* Fall back if the request is not aligned */
-    if (qed_offset_into_cluster(s, offset) ||
-        qed_offset_into_cluster(s, count)) {
-        return -ENOTSUP;
+    /* Refuse if there are untouched backing file sectors */
+    if (bs->backing_hd) {
+        if (qed_offset_into_cluster(s, sector_num * BDRV_SECTOR_SIZE) != 0) {
+            return -ENOTSUP;
+        }
+        if (qed_offset_into_cluster(s, nb_sectors * BDRV_SECTOR_SIZE) != 0) {
+            return -ENOTSUP;
+        }
    }

    /* Zero writes start without an I/O buffer.  If a buffer becomes necessary
     * then it will be allocated during request processing.
     */
-    iov.iov_base = NULL;
-    iov.iov_len = count;
+    iov.iov_base = NULL,
+    iov.iov_len  = nb_sectors * BDRV_SECTOR_SIZE,

    qemu_iovec_init_external(&qiov, &iov, 1);
-    blockacb = qed_aio_setup(bs, offset >> BDRV_SECTOR_BITS, &qiov,
-                             count >> BDRV_SECTOR_BITS,
-                             qed_co_pwrite_zeroes_cb, &cb,
+    blockacb = qed_aio_setup(bs, sector_num, &qiov, nb_sectors,
+                             qed_co_write_zeroes_cb, &cb,
                             QED_AIOCB_WRITE | QED_AIOCB_ZERO);
    if (!blockacb) {
        return -EIO;
@@ -1641,11 +1596,18 @@ static void bdrv_qed_invalidate_cache(BlockDriverState *bs, Error **errp)

    bdrv_qed_close(bs);

-    memset(s, 0, sizeof(BDRVQEDState));
-    ret = bdrv_qed_do_open(bs, NULL, bs->open_flags, &local_err);
+    bdrv_invalidate_cache(bs->file, &local_err);
    if (local_err) {
        error_propagate(errp, local_err);
-        error_prepend(errp, "Could not reopen qed layer: ");
+        return;
+    }
+
+    memset(s, 0, sizeof(BDRVQEDState));
+    ret = bdrv_qed_open(bs, NULL, bs->open_flags, &local_err);
+    if (local_err) {
+        error_setg(errp, "Could not reopen qed layer: %s",
+                   error_get_pretty(local_err));
+        error_free(local_err);
        return;
    } else if (ret < 0) {
        error_setg_errno(errp, -ret, "Could not reopen qed layer");
@@ -1702,16 +1664,16 @@ static BlockDriver bdrv_qed = {
    .supports_backing         = true,

    .bdrv_probe               = bdrv_qed_probe,
+    .bdrv_rebind              = bdrv_qed_rebind,
    .bdrv_open                = bdrv_qed_open,
    .bdrv_close               = bdrv_qed_close,
    .bdrv_reopen_prepare      = bdrv_qed_reopen_prepare,
-    .bdrv_child_perm          = bdrv_format_default_perms,
    .bdrv_create              = bdrv_qed_create,
    .bdrv_has_zero_init       = bdrv_has_zero_init_1,
    .bdrv_co_get_block_status = bdrv_qed_co_get_block_status,
    .bdrv_aio_readv           = bdrv_qed_aio_readv,
    .bdrv_aio_writev          = bdrv_qed_aio_writev,
-    .bdrv_co_pwrite_zeroes    = bdrv_qed_co_pwrite_zeroes,
+    .bdrv_co_write_zeroes     = bdrv_qed_co_write_zeroes,
    .bdrv_truncate            = bdrv_qed_truncate,
    .bdrv_getlength           = bdrv_qed_getlength,
    .bdrv_get_info            = bdrv_qed_get_info,
@@ -1721,7 +1683,6 @@ static BlockDriver bdrv_qed = {
    .bdrv_check               = bdrv_qed_check,
    .bdrv_detach_aio_context  = bdrv_qed_detach_aio_context,
    .bdrv_attach_aio_context  = bdrv_qed_attach_aio_context,
-    .bdrv_drain               = bdrv_qed_drain,
 };

 static void bdrv_qed_init(void)
@@ -16,7 +16,6 @@
 #define BLOCK_QED_H

 #include "block/block_int.h"
-#include "qemu/cutils.h"

 /* The layout of a QED file is as follows:
 *
@@ -130,6 +129,7 @@ enum {

 typedef struct QEDAIOCB {
    BlockAIOCB common;
+    QEMUBH *bh;
    int bh_ret;                     /* final return status for completion bh */
    QSIMPLEQ_ENTRY(QEDAIOCB) next;  /* next request */
    int flags;                      /* QED_AIOCB_* bits ORed together */
@@ -198,9 +198,6 @@ enum {
 */
 typedef void QEDFindClusterFunc(void *opaque, int ret, uint64_t offset, size_t len);

-void qed_acquire(BDRVQEDState *s);
-void qed_release(BDRVQEDState *s);
-
 /**
 * Generic callback for chaining async callbacks
 */
@@ -13,8 +13,6 @@
 * See the COPYING file in the top-level directory.
 */

-#include "qemu/osdep.h"
-#include "qemu/cutils.h"
 #include "block/block_int.h"
 #include "qapi/qmp/qbool.h"
 #include "qapi/qmp/qdict.h"
@@ -66,11 +64,8 @@ typedef struct QuorumVotes {

 /* the following structure holds the state of one quorum instance */
 typedef struct BDRVQuorumState {
-    BdrvChild **children;  /* children BlockDriverStates */
+    BlockDriverState **bs; /* children BlockDriverStates */
    int num_children;      /* children count */
-    unsigned next_child_index;  /* the index of the next child that should
-                                 * be added
-                                 */
    int threshold;         /* if less than threshold children reads gave the
                            * same result a quorum error occurs.
                            */
@@ -97,7 +92,7 @@ typedef struct QuorumAIOCB QuorumAIOCB;
 * $children_count QuorumChildRequest.
 */
 typedef struct QuorumChildRequest {
-    BlockDriverState *bs;
+    BlockAIOCB *aiocb;
    QEMUIOVector qiov;
    uint8_t *buf;
    int ret;
@@ -110,12 +105,11 @@ typedef struct QuorumChildRequest {
 * used to do operations on each children and track overall progress.
 */
 struct QuorumAIOCB {
-    BlockDriverState *bs;
-    Coroutine *co;
+    BlockAIOCB common;

    /* Request metadata */
-    uint64_t offset;
-    uint64_t bytes;
+    uint64_t sector_num;
+    int nb_sectors;

    QEMUIOVector *qiov;         /* calling IOV */

@@ -131,18 +125,50 @@ struct QuorumAIOCB {

    bool is_read;
    int vote_ret;
-    int children_read;          /* how many children have been read from */
+    int child_iter;             /* which child to read in fifo pattern */
 };

-typedef struct QuorumCo {
-    QuorumAIOCB *acb;
-    int idx;
-} QuorumCo;
+static bool quorum_vote(QuorumAIOCB *acb);
+
+static void quorum_aio_cancel(BlockAIOCB *blockacb)
+{
+    QuorumAIOCB *acb = container_of(blockacb, QuorumAIOCB, common);
+    BDRVQuorumState *s = acb->common.bs->opaque;
+    int i;
+
+    /* cancel all callbacks */
+    for (i = 0; i < s->num_children; i++) {
+        if (acb->qcrs[i].aiocb) {
+            bdrv_aio_cancel_async(acb->qcrs[i].aiocb);
+        }
+    }
+}
+
+static AIOCBInfo quorum_aiocb_info = {
+    .aiocb_size         = sizeof(QuorumAIOCB),
+    .cancel_async       = quorum_aio_cancel,
+};

 static void quorum_aio_finalize(QuorumAIOCB *acb)
 {
+    int i, ret = 0;
+
+    if (acb->vote_ret) {
+        ret = acb->vote_ret;
+    }
+
+    acb->common.cb(acb->common.opaque, ret);
+
+    if (acb->is_read) {
+        /* on the quorum case acb->child_iter == s->num_children - 1 */
+        for (i = 0; i <= acb->child_iter; i++) {
+            qemu_vfree(acb->qcrs[i].buf);
+            qemu_iovec_destroy(&acb->qcrs[i].qiov);
+        }
+    }
+
    g_free(acb->qcrs);
-    g_free(acb);
+    qemu_aio_unref(acb);
 }

 static bool quorum_sha256_compare(QuorumVoteValue *a, QuorumVoteValue *b)
@@ -155,26 +181,30 @@ static bool quorum_64bits_compare(QuorumVoteValue *a, QuorumVoteValue *b)
    return a->l == b->l;
 }

-static QuorumAIOCB *quorum_aio_get(BlockDriverState *bs,
+static QuorumAIOCB *quorum_aio_get(BDRVQuorumState *s,
+                                   BlockDriverState *bs,
                                   QEMUIOVector *qiov,
-                                   uint64_t offset,
-                                   uint64_t bytes)
+                                   uint64_t sector_num,
+                                   int nb_sectors,
+                                   BlockCompletionFunc *cb,
+                                   void *opaque)
 {
-    BDRVQuorumState *s = bs->opaque;
-    QuorumAIOCB *acb = g_new(QuorumAIOCB, 1);
+    QuorumAIOCB *acb = qemu_aio_get(&quorum_aiocb_info, bs, cb, opaque);
    int i;

-    *acb = (QuorumAIOCB) {
-        .co                 = qemu_coroutine_self(),
-        .bs                 = bs,
-        .offset             = offset,
-        .bytes              = bytes,
-        .qiov               = qiov,
-        .votes.compare      = quorum_sha256_compare,
-        .votes.vote_list    = QLIST_HEAD_INITIALIZER(acb.votes.vote_list),
-    };
-
+    acb->common.bs->opaque = s;
+    acb->sector_num = sector_num;
+    acb->nb_sectors = nb_sectors;
+    acb->qiov = qiov;
    acb->qcrs = g_new0(QuorumChildRequest, s->num_children);
+    acb->count = 0;
+    acb->success_count = 0;
+    acb->rewrite_count = 0;
+    acb->votes.compare = quorum_sha256_compare;
+    QLIST_INIT(&acb->votes.vote_list);
+    acb->is_read = false;
+    acb->vote_ret = 0;
+
    for (i = 0; i < s->num_children; i++) {
        acb->qcrs[i].buf = NULL;
        acb->qcrs[i].ret = 0;
@@ -184,37 +214,28 @@ static QuorumAIOCB *quorum_aio_get(BlockDriverState *bs,
    return acb;
 }

-static void quorum_report_bad(QuorumOpType type, uint64_t offset,
-                              uint64_t bytes, char *node_name, int ret)
+static void quorum_report_bad(QuorumAIOCB *acb, char *node_name, int ret)
 {
    const char *msg = NULL;
-    int64_t start_sector = offset / BDRV_SECTOR_SIZE;
-    int64_t end_sector = DIV_ROUND_UP(offset + bytes, BDRV_SECTOR_SIZE);
-
    if (ret < 0) {
        msg = strerror(-ret);
    }
-
-    qapi_event_send_quorum_report_bad(type, !!msg, msg, node_name, start_sector,
-                                      end_sector - start_sector, &error_abort);
+    qapi_event_send_quorum_report_bad(!!msg, msg, node_name,
+                                      acb->sector_num, acb->nb_sectors, &error_abort);
 }

 static void quorum_report_failure(QuorumAIOCB *acb)
 {
-    const char *reference = bdrv_get_device_or_node_name(acb->bs);
-    int64_t start_sector = acb->offset / BDRV_SECTOR_SIZE;
-    int64_t end_sector = DIV_ROUND_UP(acb->offset + acb->bytes,
-                                      BDRV_SECTOR_SIZE);
-
-    qapi_event_send_quorum_failure(reference, start_sector,
-                                   end_sector - start_sector, &error_abort);
+    const char *reference = bdrv_get_device_or_node_name(acb->common.bs);
+    qapi_event_send_quorum_failure(reference, acb->sector_num,
+                                   acb->nb_sectors, &error_abort);
 }

 static int quorum_vote_error(QuorumAIOCB *acb);

 static bool quorum_has_too_much_io_failed(QuorumAIOCB *acb)
 {
-    BDRVQuorumState *s = acb->bs->opaque;
+    BDRVQuorumState *s = acb->common.bs->opaque;

    if (acb->success_count < s->threshold) {
        acb->vote_ret = quorum_vote_error(acb);
@@ -225,7 +246,22 @@ static bool quorum_has_too_much_io_failed(QuorumAIOCB *acb)
    return false;
 }

-static int read_fifo_child(QuorumAIOCB *acb);
+static void quorum_rewrite_aio_cb(void *opaque, int ret)
+{
+    QuorumAIOCB *acb = opaque;
+
+    /* one less rewrite to do */
+    acb->rewrite_count--;
+
+    /* wait until all rewrite callbacks have completed */
+    if (acb->rewrite_count) {
+        return;
+    }
+
+    quorum_aio_finalize(acb);
+}
+
+static BlockAIOCB *read_fifo_child(QuorumAIOCB *acb);

 static void quorum_copy_qiov(QEMUIOVector *dest, QEMUIOVector *source)
 {
@@ -240,11 +276,52 @@ static void quorum_copy_qiov(QEMUIOVector *dest, QEMUIOVector *source)
    }
 }

-static void quorum_report_bad_acb(QuorumChildRequest *sacb, int ret)
+static void quorum_aio_cb(void *opaque, int ret)
 {
+    QuorumChildRequest *sacb = opaque;
    QuorumAIOCB *acb = sacb->parent;
-    QuorumOpType type = acb->is_read ? QUORUM_OP_TYPE_READ : QUORUM_OP_TYPE_WRITE;
-    quorum_report_bad(type, acb->offset, acb->bytes, sacb->bs->node_name, ret);
+    BDRVQuorumState *s = acb->common.bs->opaque;
+    bool rewrite = false;
+
+    if (acb->is_read && s->read_pattern == QUORUM_READ_PATTERN_FIFO) {
+        /* We try to read next child in FIFO order if we fail to read */
+        if (ret < 0 && ++acb->child_iter < s->num_children) {
+            read_fifo_child(acb);
+            return;
+        }
+
+        if (ret == 0) {
+            quorum_copy_qiov(acb->qiov, &acb->qcrs[acb->child_iter].qiov);
+        }
+        acb->vote_ret = ret;
+        quorum_aio_finalize(acb);
+        return;
+    }
+
+    sacb->ret = ret;
+    acb->count++;
+    if (ret == 0) {
+        acb->success_count++;
+    } else {
+        quorum_report_bad(acb, sacb->aiocb->bs->node_name, ret);
+    }
+    assert(acb->count <= s->num_children);
+    assert(acb->success_count <= s->num_children);
+    if (acb->count < s->num_children) {
+        return;
+    }
+
+    /* Do the vote on read */
+    if (acb->is_read) {
+        rewrite = quorum_vote(acb);
+    } else {
+        quorum_has_too_much_io_failed(acb);
+    }
+
+    /* if no rewrite is done the code will finish right away */
+    if (!rewrite) {
+        quorum_aio_finalize(acb);
+    }
 }

 static void quorum_report_bad_versions(BDRVQuorumState *s,
@@ -259,31 +336,12 @@ static void quorum_report_bad_versions(BDRVQuorumState *s,
            continue;
        }
        QLIST_FOREACH(item, &version->items, next) {
-            quorum_report_bad(QUORUM_OP_TYPE_READ, acb->offset, acb->bytes,
-                              s->children[item->index]->bs->node_name, 0);
+            quorum_report_bad(acb, s->bs[item->index]->node_name, 0);
        }
    }
 }

-static void quorum_rewrite_entry(void *opaque)
-{
-    QuorumCo *co = opaque;
-    QuorumAIOCB *acb = co->acb;
-    BDRVQuorumState *s = acb->bs->opaque;
-
-    /* Ignore any errors, it's just a correction attempt for already
-     * corrupted data. */
-    bdrv_co_pwritev(s->children[co->idx], acb->offset, acb->bytes,
-                    acb->qiov, 0);
-
-    /* Wake up the caller after the last rewrite */
-    acb->rewrite_count--;
-    if (!acb->rewrite_count) {
-        qemu_coroutine_enter_if_inactive(acb->co);
-    }
-}
-
-static bool quorum_rewrite_bad_versions(QuorumAIOCB *acb,
+static bool quorum_rewrite_bad_versions(BDRVQuorumState *s, QuorumAIOCB *acb,
                                        QuorumVoteValue *value)
 {
    QuorumVoteVersion *version;
@@ -302,7 +360,7 @@ static bool quorum_rewrite_bad_versions(QuorumAIOCB *acb,
        }
    }

-    /* quorum_rewrite_entry will count down this to zero */
+    /* quorum_rewrite_aio_cb will count down this to zero */
    acb->rewrite_count = count;

    /* now fire the correcting rewrites */
@@ -311,14 +369,8 @@ static bool quorum_rewrite_bad_versions(QuorumAIOCB *acb,
            continue;
        }
        QLIST_FOREACH(item, &version->items, next) {
-            Coroutine *co;
-            QuorumCo data = {
-                .acb = acb,
-                .idx = item->index,
-            };
-
-            co = qemu_coroutine_create(quorum_rewrite_entry, &data);
-            qemu_coroutine_enter(co);
+            bdrv_aio_writev(s->bs[item->index], acb->sector_num, acb->qiov,
+                            acb->nb_sectors, quorum_rewrite_aio_cb, acb);
        }
    }

@@ -438,8 +490,8 @@ static void GCC_FMT_ATTR(2, 3) quorum_err(QuorumAIOCB *acb,
    va_list ap;

    va_start(ap, fmt);
-    fprintf(stderr, "quorum: offset=%" PRIu64 " bytes=%" PRIu64 " ",
-            acb->offset, acb->bytes);
+    fprintf(stderr, "quorum: sector_num=%" PRId64 " nb_sectors=%d ",
+            acb->sector_num, acb->nb_sectors);
    vfprintf(stderr, fmt, ap);
    fprintf(stderr, "\n");
    va_end(ap);
@@ -450,15 +502,16 @@ static bool quorum_compare(QuorumAIOCB *acb,
                           QEMUIOVector *a,
                           QEMUIOVector *b)
 {
-    BDRVQuorumState *s = acb->bs->opaque;
+    BDRVQuorumState *s = acb->common.bs->opaque;
    ssize_t offset;

    /* This driver will replace blkverify in this particular case */
    if (s->is_blkverify) {
        offset = qemu_iovec_compare(a, b);
        if (offset != -1) {
-            quorum_err(acb, "contents mismatch at offset %" PRIu64,
-                       acb->offset + offset);
+            quorum_err(acb, "contents mismatch in sector %" PRId64,
+                       acb->sector_num +
+                       (uint64_t)(offset / BDRV_SECTOR_SIZE));
        }
        return true;
    }
@@ -469,7 +522,7 @@ static bool quorum_compare(QuorumAIOCB *acb,
 /* Do a vote to get the error code */
 static int quorum_vote_error(QuorumAIOCB *acb)
 {
-    BDRVQuorumState *s = acb->bs->opaque;
+    BDRVQuorumState *s = acb->common.bs->opaque;
    QuorumVoteVersion *winner = NULL;
    QuorumVotes error_votes;
    QuorumVoteValue result_value;
@@ -498,16 +551,17 @@ static int quorum_vote_error(QuorumAIOCB *acb)
    return ret;
 }

-static void quorum_vote(QuorumAIOCB *acb)
+static bool quorum_vote(QuorumAIOCB *acb)
 {
    bool quorum = true;
+    bool rewrite = false;
    int i, j, ret;
    QuorumVoteValue hash;
-    BDRVQuorumState *s = acb->bs->opaque;
+    BDRVQuorumState *s = acb->common.bs->opaque;
    QuorumVoteVersion *winner;

    if (quorum_has_too_much_io_failed(acb)) {
-        return;
+        return false;
    }

    /* get the index of the first successful read */
@@ -535,7 +589,7 @@ static void quorum_vote(QuorumAIOCB *acb)
    /* Every successful read agrees */
    if (quorum) {
        quorum_copy_qiov(acb->qiov, &acb->qcrs[i].qiov);
-        return;
+        return false;
    }

    /* compute hashes for each successful read, also store indexes */
@@ -570,180 +624,90 @@ static void quorum_vote(QuorumAIOCB *acb)

    /* corruption correction is enabled */
    if (s->rewrite_corrupted) {
-        quorum_rewrite_bad_versions(acb, &winner->value);
+        rewrite = quorum_rewrite_bad_versions(s, acb, &winner->value);
    }

 free_exit:
    /* free lists */
    quorum_free_vote_list(&acb->votes);
+    return rewrite;
 }

-static void read_quorum_children_entry(void *opaque)
+static BlockAIOCB *read_quorum_children(QuorumAIOCB *acb)
 {
-    QuorumCo *co = opaque;
-    QuorumAIOCB *acb = co->acb;
-    BDRVQuorumState *s = acb->bs->opaque;
-    int i = co->idx;
-    QuorumChildRequest *sacb = &acb->qcrs[i];
+    BDRVQuorumState *s = acb->common.bs->opaque;
+    int i;

-    sacb->bs = s->children[i]->bs;
-    sacb->ret = bdrv_co_preadv(s->children[i], acb->offset, acb->bytes,
-                               &acb->qcrs[i].qiov, 0);
-
-    if (sacb->ret == 0) {
-        acb->success_count++;
-    } else {
-        quorum_report_bad_acb(sacb, sacb->ret);
-    }
-
-    acb->count++;
-    assert(acb->count <= s->num_children);
-    assert(acb->success_count <= s->num_children);
-
-    /* Wake up the caller after the last read */
-    if (acb->count == s->num_children) {
-        qemu_coroutine_enter_if_inactive(acb->co);
-    }
-}
-
-static int read_quorum_children(QuorumAIOCB *acb)
-{
-    BDRVQuorumState *s = acb->bs->opaque;
-    int i, ret;
-
-    acb->children_read = s->num_children;
    for (i = 0; i < s->num_children; i++) {
-        acb->qcrs[i].buf = qemu_blockalign(s->children[i]->bs, acb->qiov->size);
+        acb->qcrs[i].buf = qemu_blockalign(s->bs[i], acb->qiov->size);
        qemu_iovec_init(&acb->qcrs[i].qiov, acb->qiov->niov);
        qemu_iovec_clone(&acb->qcrs[i].qiov, acb->qiov, acb->qcrs[i].buf);
    }

    for (i = 0; i < s->num_children; i++) {
-        Coroutine *co;
-        QuorumCo data = {
-            .acb = acb,
-            .idx = i,
-        };
-
-        co = qemu_coroutine_create(read_quorum_children_entry, &data);
-        qemu_coroutine_enter(co);
+        bdrv_aio_readv(s->bs[i], acb->sector_num, &acb->qcrs[i].qiov,
+                       acb->nb_sectors, quorum_aio_cb, &acb->qcrs[i]);
    }

-    while (acb->count < s->num_children) {
-        qemu_coroutine_yield();
-    }
-
-    /* Do the vote on read */
-    quorum_vote(acb);
-    for (i = 0; i < s->num_children; i++) {
-        qemu_vfree(acb->qcrs[i].buf);
-        qemu_iovec_destroy(&acb->qcrs[i].qiov);
-    }
-
-    while (acb->rewrite_count) {
-        qemu_coroutine_yield();
-    }
-
-    ret = acb->vote_ret;
-
-    return ret;
+    return &acb->common;
 }

-static int read_fifo_child(QuorumAIOCB *acb)
+static BlockAIOCB *read_fifo_child(QuorumAIOCB *acb)
 {
-    BDRVQuorumState *s = acb->bs->opaque;
-    int n, ret;
+    BDRVQuorumState *s = acb->common.bs->opaque;

-    /* We try to read the next child in FIFO order if we failed to read */
-    do {
-        n = acb->children_read++;
-        acb->qcrs[n].bs = s->children[n]->bs;
-        ret = bdrv_co_preadv(s->children[n], acb->offset, acb->bytes,
-                             acb->qiov, 0);
-        if (ret < 0) {
-            quorum_report_bad_acb(&acb->qcrs[n], ret);
-        }
-    } while (ret < 0 && acb->children_read < s->num_children);
+    acb->qcrs[acb->child_iter].buf = qemu_blockalign(s->bs[acb->child_iter],
+                                                     acb->qiov->size);
+    qemu_iovec_init(&acb->qcrs[acb->child_iter].qiov, acb->qiov->niov);
+    qemu_iovec_clone(&acb->qcrs[acb->child_iter].qiov, acb->qiov,
+                     acb->qcrs[acb->child_iter].buf);
+    bdrv_aio_readv(s->bs[acb->child_iter], acb->sector_num,
+                   &acb->qcrs[acb->child_iter].qiov, acb->nb_sectors,
+                   quorum_aio_cb, &acb->qcrs[acb->child_iter]);

-    /* FIXME: rewrite failed children if acb->children_read > 1? */
-
-    return ret;
+    return &acb->common;
 }

-static int quorum_co_preadv(BlockDriverState *bs, uint64_t offset,
-                            uint64_t bytes, QEMUIOVector *qiov, int flags)
+static BlockAIOCB *quorum_aio_readv(BlockDriverState *bs,
+                                    int64_t sector_num,
+                                    QEMUIOVector *qiov,
+                                    int nb_sectors,
+                                    BlockCompletionFunc *cb,
+                                    void *opaque)
 {
    BDRVQuorumState *s = bs->opaque;
-    QuorumAIOCB *acb = quorum_aio_get(bs, qiov, offset, bytes);
-    int ret;
-
+    QuorumAIOCB *acb = quorum_aio_get(s, bs, qiov, sector_num,
+                                      nb_sectors, cb, opaque);
    acb->is_read = true;
-    acb->children_read = 0;

    if (s->read_pattern == QUORUM_READ_PATTERN_QUORUM) {
-        ret = read_quorum_children(acb);
-    } else {
-        ret = read_fifo_child(acb);
+        acb->child_iter = s->num_children - 1;
+        return read_quorum_children(acb);
    }
-    quorum_aio_finalize(acb);

-    return ret;
+    acb->child_iter = 0;
+    return read_fifo_child(acb);
 }

-static void write_quorum_entry(void *opaque)
-{
-    QuorumCo *co = opaque;
-    QuorumAIOCB *acb = co->acb;
-    BDRVQuorumState *s = acb->bs->opaque;
-    int i = co->idx;
-    QuorumChildRequest *sacb = &acb->qcrs[i];
-
-    sacb->bs = s->children[i]->bs;
-    sacb->ret = bdrv_co_pwritev(s->children[i], acb->offset, acb->bytes,
-                                acb->qiov, 0);
-    if (sacb->ret == 0) {
-        acb->success_count++;
-    } else {
-        quorum_report_bad_acb(sacb, sacb->ret);
-    }
-    acb->count++;
-    assert(acb->count <= s->num_children);
-    assert(acb->success_count <= s->num_children);
-
-    /* Wake up the caller after the last write */
-    if (acb->count == s->num_children) {
-        qemu_coroutine_enter_if_inactive(acb->co);
-    }
-}
-
-static int quorum_co_pwritev(BlockDriverState *bs, uint64_t offset,
-                             uint64_t bytes, QEMUIOVector *qiov, int flags)
+static BlockAIOCB *quorum_aio_writev(BlockDriverState *bs,
+                                     int64_t sector_num,
+                                     QEMUIOVector *qiov,
+                                     int nb_sectors,
+                                     BlockCompletionFunc *cb,
+                                     void *opaque)
 {
    BDRVQuorumState *s = bs->opaque;
-    QuorumAIOCB *acb = quorum_aio_get(bs, qiov, offset, bytes);
-    int i, ret;
+    QuorumAIOCB *acb = quorum_aio_get(s, bs, qiov, sector_num, nb_sectors,
+                                      cb, opaque);
+    int i;

    for (i = 0; i < s->num_children; i++) {
-        Coroutine *co;
-        QuorumCo data = {
-            .acb = acb,
-            .idx = i,
-        };
-
-        co = qemu_coroutine_create(write_quorum_entry, &data);
-        qemu_coroutine_enter(co);
+        acb->qcrs[i].aiocb = bdrv_aio_writev(s->bs[i], sector_num, qiov,
+                                             nb_sectors, &quorum_aio_cb,
+                                             &acb->qcrs[i]);
    }

-    while (acb->count < s->num_children) {
-        qemu_coroutine_yield();
-    }
-
-    quorum_has_too_much_io_failed(acb);
-
-    ret = acb->vote_ret;
-    quorum_aio_finalize(acb);
-
-    return ret;
+    return &acb->common;
 }

 static int64_t quorum_getlength(BlockDriverState *bs)
@@ -753,12 +717,12 @@ static int64_t quorum_getlength(BlockDriverState *bs)
    int i;

    /* check that all file have the same length */
-    result = bdrv_getlength(s->children[0]->bs);
+    result = bdrv_getlength(s->bs[0]);
    if (result < 0) {
        return result;
    }
    for (i = 1; i < s->num_children; i++) {
-        int64_t value = bdrv_getlength(s->children[i]->bs);
+        int64_t value = bdrv_getlength(s->bs[i]);
        if (value < 0) {
            return value;
        }
@@ -770,6 +734,21 @@ static int64_t quorum_getlength(BlockDriverState *bs)
    return result;
 }

+static void quorum_invalidate_cache(BlockDriverState *bs, Error **errp)
+{
+    BDRVQuorumState *s = bs->opaque;
+    Error *local_err = NULL;
+    int i;
+
+    for (i = 0; i < s->num_children; i++) {
+        bdrv_invalidate_cache(s->bs[i], &local_err);
+        if (local_err) {
+            error_propagate(errp, local_err);
+            return;
+        }
+    }
+}
+
 static coroutine_fn int quorum_co_flush(BlockDriverState *bs)
 {
    BDRVQuorumState *s = bs->opaque;
@@ -778,30 +757,19 @@ static coroutine_fn int quorum_co_flush(BlockDriverState *bs)
    QuorumVoteValue result_value;
    int i;
    int result = 0;
-    int success_count = 0;

    QLIST_INIT(&error_votes.vote_list);
    error_votes.compare = quorum_64bits_compare;

    for (i = 0; i < s->num_children; i++) {
-        result = bdrv_co_flush(s->children[i]->bs);
-        if (result) {
-            quorum_report_bad(QUORUM_OP_TYPE_FLUSH, 0,
-                              bdrv_getlength(s->children[i]->bs),
-                              s->children[i]->bs->node_name, result);
-            result_value.l = result;
-            quorum_count_vote(&error_votes, &result_value, i);
-        } else {
-            success_count++;
-        }
+        result = bdrv_co_flush(s->bs[i]);
+        result_value.l = result;
+        quorum_count_vote(&error_votes, &result_value, i);
    }

-    if (success_count >= s->threshold) {
-        result = 0;
-    } else {
-        winner = quorum_get_vote_winner(&error_votes);
-        result = winner->value.l;
-    }
+    winner = quorum_get_vote_winner(&error_votes);
+    result = winner->value.l;
+
    quorum_free_vote_list(&error_votes);

    return result;
@@ -814,7 +782,7 @@ static bool quorum_recurse_is_first_non_filter(BlockDriverState *bs,
    int i;

    for (i = 0; i < s->num_children; i++) {
-        bool perm = bdrv_recurse_is_first_non_filter(s->children[i]->bs,
+        bool perm = bdrv_recurse_is_first_non_filter(s->bs[i],
                                                     candidate);
        if (perm) {
            return true;
@@ -878,7 +846,7 @@ static int parse_read_pattern(const char *opt)
        return QUORUM_READ_PATTERN_QUORUM;
    }

-    for (i = 0; i < QUORUM_READ_PATTERN__MAX; i++) {
+    for (i = 0; i < QUORUM_READ_PATTERN_MAX; i++) {
        if (!strcmp(opt, QuorumReadPattern_lookup[i])) {
            return i;
        }
@@ -906,9 +874,9 @@ static int quorum_open(BlockDriverState *bs, QDict *options, int flags,
        ret = -EINVAL;
        goto exit;
    }
-    if (s->num_children < 1) {
+    if (s->num_children < 2) {
        error_setg(&local_err,
-                   "Number of provided children must be 1 or more");
+                   "Number of provided children must be greater than 1");
        ret = -EINVAL;
        goto exit;
    }
@@ -921,12 +889,6 @@ static int quorum_open(BlockDriverState *bs, QDict *options, int flags,
    }

    s->threshold = qemu_opt_get_number(opts, QUORUM_OPT_VOTE_THRESHOLD, 0);
-    /* and validate it against s->num_children */
-    ret = quorum_valid_threshold(s->threshold, s->num_children, &local_err);
-    if (ret < 0) {
-        goto exit;
-    }
-
    ret = parse_read_pattern(qemu_opt_get(opts, QUORUM_OPT_READ_PATTERN));
    if (ret < 0) {
        error_setg(&local_err, "Please set read-pattern as fifo or quorum");
@@ -935,6 +897,12 @@ static int quorum_open(BlockDriverState *bs, QDict *options, int flags,
    s->read_pattern = ret;

    if (s->read_pattern == QUORUM_READ_PATTERN_QUORUM) {
+        /* and validate it against s->num_children */
+        ret = quorum_valid_threshold(s->threshold, s->num_children, &local_err);
+        if (ret < 0) {
+            goto exit;
+        }
+
        /* is the driver in blkverify mode */
        if (qemu_opt_get_bool(opts, QUORUM_OPT_BLKVERIFY, false) &&
            s->num_children == 2 && s->threshold == 2) {
@@ -954,8 +922,8 @@ static int quorum_open(BlockDriverState *bs, QDict *options, int flags,
        }
    }

-    /* allocate the children array */
-    s->children = g_new0(BdrvChild *, s->num_children);
+    /* allocate the children BlockDriverState array */
+    s->bs = g_new0(BlockDriverState *, s->num_children);
    opened = g_new0(bool, s->num_children);

    for (i = 0; i < s->num_children; i++) {
@@ -963,16 +931,14 @@ static int quorum_open(BlockDriverState *bs, QDict *options, int flags,
        ret = snprintf(indexstr, 32, "children.%d", i);
        assert(ret < 32);

-        s->children[i] = bdrv_open_child(NULL, options, indexstr, bs,
-                                         &child_format, false, &local_err);
-        if (local_err) {
-            ret = -EINVAL;
+        ret = bdrv_open_image(&s->bs[i], NULL, options, indexstr, bs,
+                              &child_format, false, &local_err);
+        if (ret < 0) {
            goto close_exit;
        }

        opened[i] = true;
    }
-    s->next_child_index = s->num_children;

    g_free(opened);
    goto exit;
@@ -983,14 +949,16 @@ close_exit:
        if (!opened[i]) {
            continue;
        }
-        bdrv_unref_child(bs, s->children[i]);
+        bdrv_unref(s->bs[i]);
    }
-    g_free(s->children);
+    g_free(s->bs);
    g_free(opened);
 exit:
    qemu_opts_del(opts);
    /* propagate error */
-    error_propagate(errp, local_err);
+    if (local_err) {
+        error_propagate(errp, local_err);
+    }
    return ret;
 }

@@ -1000,86 +968,34 @@ static void quorum_close(BlockDriverState *bs)
    int i;

    for (i = 0; i < s->num_children; i++) {
-        bdrv_unref_child(bs, s->children[i]);
+        bdrv_unref(s->bs[i]);
    }

-    g_free(s->children);
+    g_free(s->bs);
 }

-static void quorum_add_child(BlockDriverState *bs, BlockDriverState *child_bs,
-                             Error **errp)
-{
-    BDRVQuorumState *s = bs->opaque;
-    BdrvChild *child;
-    char indexstr[32];
-    int ret;
-
-    assert(s->num_children <= INT_MAX / sizeof(BdrvChild *));
-    if (s->num_children == INT_MAX / sizeof(BdrvChild *) ||
-        s->next_child_index == UINT_MAX) {
-        error_setg(errp, "Too many children");
-        return;
-    }
-
-    ret = snprintf(indexstr, 32, "children.%u", s->next_child_index);
-    if (ret < 0 || ret >= 32) {
-        error_setg(errp, "cannot generate child name");
-        return;
-    }
-    s->next_child_index++;
-
-    bdrv_drained_begin(bs);
-
-    /* We can safely add the child now */
-    bdrv_ref(child_bs);
-
-    child = bdrv_attach_child(bs, child_bs, indexstr, &child_format, errp);
-    if (child == NULL) {
-        s->next_child_index--;
-        bdrv_unref(child_bs);
-        goto out;
-    }
-    s->children = g_renew(BdrvChild *, s->children, s->num_children + 1);
-    s->children[s->num_children++] = child;
-
-out:
-    bdrv_drained_end(bs);
-}
-
-static void quorum_del_child(BlockDriverState *bs, BdrvChild *child,
-                             Error **errp)
+static void quorum_detach_aio_context(BlockDriverState *bs)
 {
    BDRVQuorumState *s = bs->opaque;
    int i;

    for (i = 0; i < s->num_children; i++) {
-        if (s->children[i] == child) {
-            break;
-        }
+        bdrv_detach_aio_context(s->bs[i]);
    }
-
-    /* we have checked it in bdrv_del_child() */
-    assert(i < s->num_children);
-
-    if (s->num_children <= s->threshold) {
-        error_setg(errp,
-            "The number of children cannot be lower than the vote threshold %d",
-            s->threshold);
-        return;
-    }
-
-    bdrv_drained_begin(bs);
-
-    /* We can safely remove this child now */
-    memmove(&s->children[i], &s->children[i + 1],
-            (s->num_children - i - 1) * sizeof(BdrvChild *));
-    s->children = g_renew(BdrvChild *, s->children, --s->num_children);
-    bdrv_unref_child(bs, child);
-
-    bdrv_drained_end(bs);
 }

-static void quorum_refresh_filename(BlockDriverState *bs, QDict *options)
+static void quorum_attach_aio_context(BlockDriverState *bs,
+                                      AioContext *new_context)
+{
+    BDRVQuorumState *s = bs->opaque;
+    int i;
+
+    for (i = 0; i < s->num_children; i++) {
+        bdrv_attach_aio_context(s->bs[i], new_context);
+    }
+}
+
+static void quorum_refresh_filename(BlockDriverState *bs)
 {
    BDRVQuorumState *s = bs->opaque;
    QDict *opts;
@@ -1087,24 +1003,27 @@ static void quorum_refresh_filename(BlockDriverState *bs, QDict *options)
    int i;

    for (i = 0; i < s->num_children; i++) {
-        bdrv_refresh_filename(s->children[i]->bs);
-        if (!s->children[i]->bs->full_open_options) {
+        bdrv_refresh_filename(s->bs[i]);
+        if (!s->bs[i]->full_open_options) {
            return;
        }
    }

    children = qlist_new();
    for (i = 0; i < s->num_children; i++) {
-        QINCREF(s->children[i]->bs->full_open_options);
-        qlist_append(children, s->children[i]->bs->full_open_options);
+        QINCREF(s->bs[i]->full_open_options);
+        qlist_append_obj(children, QOBJECT(s->bs[i]->full_open_options));
    }

    opts = qdict_new();
-    qdict_put_str(opts, "driver", "quorum");
-    qdict_put_int(opts, QUORUM_OPT_VOTE_THRESHOLD, s->threshold);
-    qdict_put_bool(opts, QUORUM_OPT_BLKVERIFY, s->is_blkverify);
-    qdict_put_bool(opts, QUORUM_OPT_REWRITE, s->rewrite_corrupted);
-    qdict_put(opts, "children", children);
+    qdict_put_obj(opts, "driver", QOBJECT(qstring_from_str("quorum")));
+    qdict_put_obj(opts, QUORUM_OPT_VOTE_THRESHOLD,
+                  QOBJECT(qint_from_int(s->threshold)));
+    qdict_put_obj(opts, QUORUM_OPT_BLKVERIFY,
+                  QOBJECT(qbool_from_bool(s->is_blkverify)));
+    qdict_put_obj(opts, QUORUM_OPT_REWRITE,
+                  QOBJECT(qbool_from_bool(s->rewrite_corrupted)));
+    qdict_put_obj(opts, "children", QOBJECT(children));

    bs->full_open_options = opts;
 }
@@ -1123,13 +1042,12 @@ static BlockDriver bdrv_quorum = {

    .bdrv_getlength                     = quorum_getlength,

-    .bdrv_co_preadv                     = quorum_co_preadv,
-    .bdrv_co_pwritev                    = quorum_co_pwritev,
+    .bdrv_aio_readv                     = quorum_aio_readv,
+    .bdrv_aio_writev                    = quorum_aio_writev,
+    .bdrv_invalidate_cache              = quorum_invalidate_cache,

-    .bdrv_add_child                     = quorum_add_child,
-    .bdrv_del_child                     = quorum_del_child,
-
-    .bdrv_child_perm                    = bdrv_filter_default_perms,
+    .bdrv_detach_aio_context            = quorum_detach_aio_context,
+    .bdrv_attach_aio_context            = quorum_attach_aio_context,

    .is_filter                          = true,
    .bdrv_recurse_is_first_non_filter   = quorum_recurse_is_first_non_filter,
--- a/Show More
+++ b/Show More
@@ -1 +1 @@
 .9.1
 .4.1