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
3361 changed files with 107771 additions and 278636 deletions
@@ -1,2 +0,0 @@
-((c-mode . ((c-file-style . "stroustrup")
-	    (indent-tabs-mode . nil))))
@@ -5,7 +5,6 @@
 /config-target.*
 /config.status
 /config-temp
-/trace-events-all
 /trace/generated-tracers.h
 /trace/generated-tracers.c
 /trace/generated-tracers-dtrace.h
@@ -20,13 +19,12 @@
 /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
@@ -36,7 +34,6 @@
 /qapi-visit.[ch]
 /qapi-event.[ch]
 /qmp-commands.h
-/qmp-introspect.[ch]
 /qmp-marshal.c
 /qemu-doc.html
 /qemu-tech.html
@@ -52,7 +49,6 @@
 /qemu-ga
 /qemu-bridge-helper
 /qemu-monitor.texi
-/qemu-monitor-info.texi
 /qmp-commands.txt
 /vscclient
 /fsdev/virtfs-proxy-helper
@@ -62,7 +58,6 @@
 *.cp
 *.dvi
 *.exe
-*.msi
 *.dll
 *.so
 *.mo
@@ -95,10 +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
@@ -113,5 +104,4 @@
 cscope.*
 tags
 TAGS
-docker-src.*
 *~
@@ -1,101 +1,103 @@
-sudo: false
 language: c
 python:
  - "2.4"
 compiler:
  - gcc
  - clang
-cache: ccache
-addons:
-  apt:
-    packages:
-      - 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"
 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:
-    # 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
-    - env: CONFIG=""
-      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
+    - 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
@@ -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

@@ -157,62 +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),)
@@ -30,7 +30,8 @@ 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 $@ is out-of-date, running configure
 	@# TODO: The next lines include code which supports a smooth
 	@# transition from old configurations without config.status.
@@ -48,13 +49,9 @@ ifneq ($(filter-out $(UNCHECKED_GOALS),$(MAKECMDGOALS)),$(if $(MAKECMDGOALS),,fa
 endif
 endif

-include $(SRC_PATH)/rules.mak
-
-GENERATED_HEADERS = qemu-version.h config-host.h qemu-options.def
+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_HEADERS += qmp-introspect.h
-GENERATED_SOURCES += qmp-introspect.c

 GENERATED_HEADERS += trace/generated-events.h
 GENERATED_SOURCES += trace/generated-events.c
@@ -82,7 +79,7 @@ Makefile: ;
 configure: ;

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

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

@@ -91,8 +88,10 @@ LIBS+=-lz $(LIBS_TOOLS)
 HELPERS-$(CONFIG_LINUX) = qemu-bridge-helper$(EXESUF)

 ifdef BUILD_DOCS
-DOCS=qemu-doc.html qemu-tech.html qemu.1 qemu-img.1 qemu-nbd.8 qemu-ga.8
-DOCS+=qmp-commands.txt
+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
@@ -117,7 +116,7 @@ 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")
 	$(call quiet-command, if test -f $@; then \
@@ -149,55 +148,30 @@ dummy := $(call unnest-vars,, \
                stub-obj-y \
                util-obj-y \
                qga-obj-y \
-                ivshmem-client-obj-y \
-                ivshmem-server-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)

 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, cmp -s $@ $@.tmp || mv $@.tmp $@)
-
 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
+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-%:
@@ -222,12 +196,11 @@ subdir-dtc:dtc/libfdt dtc/tests
 dtc/%:
 	mkdir -p $@

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

@@ -253,16 +226,16 @@ util/module.o-cflags = -D'CONFIG_BLOCK_MODULES=$(block-modules)'

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

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

-fsdev/virtfs-proxy-helper$(EXESUF): fsdev/virtfs-proxy-helper.o fsdev/9p-marshal.o fsdev/9p-iov-marshal.o libqemuutil.a libqemustub.a
+fsdev/virtfs-proxy-helper$(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
+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)
@@ -290,9 +263,7 @@ $(SRC_PATH)/qga/qapi-schema.json $(SRC_PATH)/scripts/qapi-commands.py $(qapi-py)

 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)
@@ -314,11 +285,6 @@ $(qapi-modules) $(SRC_PATH)/scripts/qapi-commands.py $(qapi-py)
 	$(call quiet-command,$(PYTHON) $(SRC_PATH)/scripts/qapi-commands.py \
 		$(gen-out-type) -o "." -m $<, \
 		"  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   $@")

 QGALIB_GEN=$(addprefix qga/qapi-generated/, qga-qapi-types.h qga-qapi-visit.h qga-qmp-commands.h)
 $(qga-obj-y) qemu-ga.o: $(QGALIB_GEN)
@@ -329,30 +295,24 @@ qemu-ga$(EXESUF): $(qga-obj-y) libqemuutil.a libqemustub.a
 ifdef QEMU_GA_MSI_ENABLED
 QEMU_GA_MSI=qemu-ga-$(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="$(BUILD_DIR)" \
+$(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) libqemuutil.a libqemustub.a
-	$(call LINK, $^)
-ivshmem-server$(EXESUF): $(ivshmem-server-obj-y) libqemuutil.a libqemustub.a
-	$(call LINK, $^)
-
 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
@@ -375,7 +335,6 @@ clean:
 	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)

@@ -385,7 +344,7 @@ 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 $(DOCS) qemu-options.texi qemu-img-cmds.texi qemu-monitor.texi
 	rm -f config-all-devices.mak config-all-disas.mak config.status
 	rm -f po/*.mo tests/qemu-iotests/common.env
 	rm -f roms/seabios/config.mak roms/vgabios/config.mak
@@ -411,16 +370,16 @@ bepo    cz
 ifdef INSTALL_BLOBS
 BLOBS=bios.bin bios-256k.bin sgabios.bin vgabios.bin vgabios-cirrus.bin \
 vgabios-stdvga.bin vgabios-vmware.bin vgabios-qxl.bin vgabios-virtio.bin \
-acpi-dsdt.aml \
+acpi-dsdt.aml q35-acpi-dsdt.aml \
 ppc_rom.bin openbios-sparc32 openbios-sparc64 openbios-ppc QEMU,tcx.bin QEMU,cgthree.bin \
 pxe-e1000.rom pxe-eepro100.rom pxe-ne2k_pci.rom \
 pxe-pcnet.rom pxe-rtl8139.rom pxe-virtio.rom \
 efi-e1000.rom efi-eepro100.rom efi-ne2k_pci.rom \
 efi-pcnet.rom efi-rtl8139.rom efi-virtio.rom \
-efi-e1000e.rom efi-vmxnet3.rom \
 qemu-icon.bmp qemu_logo_no_text.svg \
 bamboo.dtb petalogix-s3adsp1800.dtb petalogix-ml605.dtb \
-multiboot.bin linuxboot.bin linuxboot_dma.bin kvmvapic.bin \
+multiboot.bin linuxboot.bin kvmvapic.bin \
+s390-zipl.rom \
 s390-ccw.img \
 spapr-rtas.bin slof.bin \
 palcode-clipper \
@@ -441,9 +400,6 @@ ifneq ($(TOOLS),)
 	$(INSTALL_DIR) "$(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"
-endif
 endif
 ifdef CONFIG_VIRTFS
 	$(INSTALL_DIR) "$(DESTDIR)$(mandir)/man1"
@@ -464,7 +420,7 @@ endif
 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)"
@@ -489,7 +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
@@ -500,12 +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:
@@ -546,29 +502,25 @@ TEXIFLAG=$(if $(V),,--quiet)
 %.pdf: %.texi
 	$(call quiet-command,texi2pdf $(TEXIFLAG) -I . $<,"  GEN   $@")

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

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

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

-qemu.1: qemu-doc.texi qemu-options.texi qemu-monitor.texi qemu-monitor-info.texi
+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   $@")
-qemu.1: qemu-option-trace.texi

-qemu-img.1: qemu-img.texi qemu-option-trace.texi qemu-img-cmds.texi
+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 > $@, \
@@ -580,16 +532,16 @@ fsdev/virtfs-proxy-helper.1: fsdev/virtfs-proxy-helper.texi
 	  $(POD2MAN) --section=1 --center=" " --release=" " fsdev/virtfs-proxy-helper.pod > $@, \
 	  "  GEN   $@")

-qemu-nbd.8: qemu-nbd.texi qemu-option-trace.texi
+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-ga.8: qemu-ga.texi
+kvm_stat.1: scripts/kvm/kvm_stat.texi
 	$(call quiet-command, \
-	  perl -Ww -- $(SRC_PATH)/scripts/texi2pod.pl $< qemu-ga.pod && \
-	  $(POD2MAN) --section=8 --center=" " --release=" " qemu-ga.pod > $@, \
+	  perl -Ww -- $(SRC_PATH)/scripts/texi2pod.pl $< kvm_stat.pod && \
+	  $(POD2MAN) --section=1 --center=" " --release=" " kvm_stat.pod > $@, \
 	  "  GEN   $@")

 dvi: qemu-doc.dvi qemu-tech.dvi
@@ -598,9 +550,8 @@ 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-option-trace.texi \
-	qemu-monitor.texi qemu-img-cmds.texi qemu-ga.texi \
-	qemu-monitor-info.texi
+	qemu-img.texi qemu-nbd.texi qemu-options.texi \
+	qemu-monitor.texi qemu-img-cmds.texi

 ifdef CONFIG_WIN32

@@ -650,7 +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
@@ -667,5 +617,3 @@ endif
 # 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
@@ -1,38 +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
+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 = async.o thread-pool.o
-block-obj-y += nbd/
-block-obj-y += block.o blockjob.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-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
@@ -52,6 +52,7 @@ common-obj-$(CONFIG_LINUX) += fsdev/
 common-obj-y += migration/
 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

@@ -59,8 +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)
@@ -76,18 +75,20 @@ 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 += qemu-log.o
 common-obj-y += tcg-runtime.o
 common-obj-y += hw/
 common-obj-y += qom/
@@ -110,52 +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/
-
-
-######################################################################
-trace-events-y = trace-events
-trace-events-y += util/trace-events
-trace-events-y += crypto/trace-events
-trace-events-y += io/trace-events
-trace-events-y += migration/trace-events
-trace-events-y += block/trace-events
-trace-events-y += hw/block/trace-events
-trace-events-y += hw/char/trace-events
-trace-events-y += hw/intc/trace-events
-trace-events-y += hw/net/trace-events
-trace-events-y += hw/virtio/trace-events
-trace-events-y += hw/audio/trace-events
-trace-events-y += hw/misc/trace-events
-trace-events-y += hw/usb/trace-events
-trace-events-y += hw/scsi/trace-events
-trace-events-y += hw/nvram/trace-events
-trace-events-y += hw/display/trace-events
-trace-events-y += hw/input/trace-events
-trace-events-y += hw/timer/trace-events
-trace-events-y += hw/dma/trace-events
-trace-events-y += hw/sparc/trace-events
-trace-events-y += hw/sd/trace-events
-trace-events-y += hw/isa/trace-events
-trace-events-y += hw/i386/trace-events
-trace-events-y += hw/9pfs/trace-events
-trace-events-y += hw/ppc/trace-events
-trace-events-y += hw/pci/trace-events
-trace-events-y += hw/s390x/trace-events
-trace-events-y += hw/vfio/trace-events
-trace-events-y += hw/acpi/trace-events
-trace-events-y += hw/arm/trace-events
-trace-events-y += hw/alpha/trace-events
-trace-events-y += ui/trace-events
-trace-events-y += audio/trace-events
-trace-events-y += net/trace-events
-trace-events-y += target-i386/trace-events
-trace-events-y += target-sparc/trace-events
-trace-events-y += target-s390x/trace-events
-trace-events-y += target-ppc/trace-events
-trace-events-y += qom/trace-events
-trace-events-y += linux-user/trace-events
@@ -7,7 +7,7 @@ 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
@@ -48,7 +48,7 @@ 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) \
 		--format=stap \
 		--backends=$(TRACE_BACKENDS) \
@@ -57,7 +57,7 @@ $(QEMU_PROG).stp-installed: $(BUILD_DIR)/trace-events-all
 		--target-type=$(TARGET_TYPE) \
 		< $< > $@,"  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) \
 		--format=stap \
 		--backends=$(TRACE_BACKENDS) \
@@ -66,7 +66,7 @@ $(QEMU_PROG).stp: $(BUILD_DIR)/trace-events-all
 		--target-type=$(TARGET_TYPE) \
 		< $< > $@,"  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) \
 		--format=simpletrace-stap \
 		--backends=$(TRACE_BACKENDS) \
@@ -85,11 +85,8 @@ 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)/
@@ -108,9 +105,7 @@ 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
@@ -156,7 +151,7 @@ else
 obj-y += hw/$(TARGET_BASE_ARCH)/
 endif

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

 endif # CONFIG_SOFTMMU

@@ -175,20 +170,12 @@ target-obj-y-save := $(target-obj-y)
 dummy := $(call unnest-vars,.., \
               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)
 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) += $(block-obj-y)
-all-obj-$(CONFIG_USER_ONLY) += $(crypto-aes-obj-y)
-all-obj-$(CONFIG_SOFTMMU) += $(crypto-obj-y)
-all-obj-$(CONFIG_SOFTMMU) += $(io-obj-y)

 $(QEMU_PROG_BUILD): config-devices.mak

@@ -203,13 +190,10 @@ 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   $(TARGET_DIR)$@")

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

 clean:
@@ -1,107 +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
-
-Complete details of the process for building and configuring QEMU for
-all supported host platforms can be found in the qemu-tech.html file.
-Additional information can also be found online via the QEMU website:
-
-  http://qemu-project.org/Hosts/Linux
-  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 @@
-2.7.1
+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"
@@ -77,7 +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];
@@ -128,6 +127,8 @@ void configure_accelerator(MachineState *ms)
    if (init_failed) {
        fprintf(stderr, "Back to %s accelerator.\n", acc->name);
    }
+
+    return !accel_initialised;
 }


@@ -13,14 +13,10 @@
 * 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"
-#ifdef CONFIG_EPOLL_CREATE1
-#include <sys/epoll.h>
-#endif

 struct AioHandler
 {
@@ -29,166 +25,9 @@ struct AioHandler
    IOHandler *io_write;
    int deleted;
    void *opaque;
-    bool is_external;
    QLIST_ENTRY(AioHandler) node;
 };

-#ifdef CONFIG_EPOLL_CREATE1
-
-/* The fd number threashold to switch to epoll */
-#define EPOLL_ENABLE_THRESHOLD 64
-
-static void aio_epoll_disable(AioContext *ctx)
-{
-    ctx->epoll_available = false;
-    if (!ctx->epoll_enabled) {
-        return;
-    }
-    ctx->epoll_enabled = false;
-    close(ctx->epollfd);
-}
-
-static inline int epoll_events_from_pfd(int pfd_events)
-{
-    return (pfd_events & G_IO_IN ? EPOLLIN : 0) |
-           (pfd_events & G_IO_OUT ? EPOLLOUT : 0) |
-           (pfd_events & G_IO_HUP ? EPOLLHUP : 0) |
-           (pfd_events & G_IO_ERR ? EPOLLERR : 0);
-}
-
-static bool aio_epoll_try_enable(AioContext *ctx)
-{
-    AioHandler *node;
-    struct epoll_event event;
-
-    QLIST_FOREACH(node, &ctx->aio_handlers, node) {
-        int r;
-        if (node->deleted || !node->pfd.events) {
-            continue;
-        }
-        event.events = epoll_events_from_pfd(node->pfd.events);
-        event.data.ptr = node;
-        r = epoll_ctl(ctx->epollfd, EPOLL_CTL_ADD, node->pfd.fd, &event);
-        if (r) {
-            return false;
-        }
-    }
-    ctx->epoll_enabled = true;
-    return true;
-}
-
-static void aio_epoll_update(AioContext *ctx, AioHandler *node, bool is_new)
-{
-    struct epoll_event event;
-    int r;
-
-    if (!ctx->epoll_enabled) {
-        return;
-    }
-    if (!node->pfd.events) {
-        r = epoll_ctl(ctx->epollfd, EPOLL_CTL_DEL, node->pfd.fd, &event);
-        if (r) {
-            aio_epoll_disable(ctx);
-        }
-    } else {
-        event.data.ptr = node;
-        event.events = epoll_events_from_pfd(node->pfd.events);
-        if (is_new) {
-            r = epoll_ctl(ctx->epollfd, EPOLL_CTL_ADD, node->pfd.fd, &event);
-            if (r) {
-                aio_epoll_disable(ctx);
-            }
-        } else {
-            r = epoll_ctl(ctx->epollfd, EPOLL_CTL_MOD, node->pfd.fd, &event);
-            if (r) {
-                aio_epoll_disable(ctx);
-            }
-        }
-    }
-}
-
-static int aio_epoll(AioContext *ctx, GPollFD *pfds,
-                     unsigned npfd, int64_t timeout)
-{
-    AioHandler *node;
-    int i, ret = 0;
-    struct epoll_event events[128];
-
-    assert(npfd == 1);
-    assert(pfds[0].fd == ctx->epollfd);
-    if (timeout > 0) {
-        ret = qemu_poll_ns(pfds, npfd, timeout);
-    }
-    if (timeout <= 0 || ret > 0) {
-        ret = epoll_wait(ctx->epollfd, events,
-                         sizeof(events) / sizeof(events[0]),
-                         timeout);
-        if (ret <= 0) {
-            goto out;
-        }
-        for (i = 0; i < ret; i++) {
-            int ev = events[i].events;
-            node = events[i].data.ptr;
-            node->pfd.revents = (ev & EPOLLIN ? G_IO_IN : 0) |
-                (ev & EPOLLOUT ? G_IO_OUT : 0) |
-                (ev & EPOLLHUP ? G_IO_HUP : 0) |
-                (ev & EPOLLERR ? G_IO_ERR : 0);
-        }
-    }
-out:
-    return ret;
-}
-
-static bool aio_epoll_enabled(AioContext *ctx)
-{
-    /* Fall back to ppoll when external clients are disabled. */
-    return !aio_external_disabled(ctx) && ctx->epoll_enabled;
-}
-
-static bool aio_epoll_check_poll(AioContext *ctx, GPollFD *pfds,
-                                 unsigned npfd, int64_t timeout)
-{
-    if (!ctx->epoll_available) {
-        return false;
-    }
-    if (aio_epoll_enabled(ctx)) {
-        return true;
-    }
-    if (npfd >= EPOLL_ENABLE_THRESHOLD) {
-        if (aio_epoll_try_enable(ctx)) {
-            return true;
-        } else {
-            aio_epoll_disable(ctx);
-        }
-    }
-    return false;
-}
-
-#else
-
-static void aio_epoll_update(AioContext *ctx, AioHandler *node, bool is_new)
-{
-}
-
-static int aio_epoll(AioContext *ctx, GPollFD *pfds,
-                     unsigned npfd, int64_t timeout)
-{
-    assert(false);
-}
-
-static bool aio_epoll_enabled(AioContext *ctx)
-{
-    return false;
-}
-
-static bool aio_epoll_check_poll(AioContext *ctx, GPollFD *pfds,
-                          unsigned npfd, int64_t timeout)
-{
-    return false;
-}
-
-#endif
-
 static AioHandler *find_aio_handler(AioContext *ctx, int fd)
 {
    AioHandler *node;
@@ -204,14 +43,11 @@ static AioHandler *find_aio_handler(AioContext *ctx, int fd)

 void aio_set_fd_handler(AioContext *ctx,
                        int fd,
-                        bool is_external,
                        IOHandler *io_read,
                        IOHandler *io_write,
                        void *opaque)
 {
    AioHandler *node;
-    bool is_new = false;
-    bool deleted = false;

    node = find_aio_handler(ctx, fd);

@@ -230,7 +66,7 @@ void aio_set_fd_handler(AioContext *ctx,
                 * releasing the walking_handlers lock.
                 */
                QLIST_REMOVE(node, node);
-                deleted = true;
+                g_free(node);
            }
        }
    } else {
@@ -241,32 +77,25 @@ void aio_set_fd_handler(AioContext *ctx,
            QLIST_INSERT_HEAD(&ctx->aio_handlers, node, node);

            g_source_add_poll(&ctx->source, &node->pfd);
-            is_new = true;
        }
        /* Update handler with latest information */
        node->io_read = io_read;
        node->io_write = io_write;
        node->opaque = opaque;
-        node->is_external = is_external;

        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_epoll_update(ctx, node, is_new);
    aio_notify(ctx);
-    if (deleted) {
-        g_free(node);
-    }
 }

 void aio_set_event_notifier(AioContext *ctx,
                            EventNotifier *notifier,
-                            bool is_external,
                            EventNotifierHandler *io_read)
 {
    aio_set_fd_handler(ctx, event_notifier_get_fd(notifier),
-                       is_external, (IOHandler *)io_read, NULL, notifier);
+                       (IOHandler *)io_read, NULL, notifier);
 }

 bool aio_prepare(AioContext *ctx)
@@ -282,12 +111,10 @@ bool aio_pending(AioContext *ctx)
        int revents;

        revents = node->pfd.revents & node->pfd.events;
-        if (revents & (G_IO_IN | G_IO_HUP | G_IO_ERR) && node->io_read &&
-            aio_node_check(ctx, node->is_external)) {
+        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 &&
-            aio_node_check(ctx, node->is_external)) {
+        if (revents & (G_IO_OUT | G_IO_ERR) && node->io_write) {
            return true;
        }
    }
@@ -325,7 +152,6 @@ bool aio_dispatch(AioContext *ctx)

        if (!node->deleted &&
            (revents & (G_IO_IN | G_IO_HUP | G_IO_ERR)) &&
-            aio_node_check(ctx, node->is_external) &&
            node->io_read) {
            node->io_read(node->opaque);

@@ -336,7 +162,6 @@ bool aio_dispatch(AioContext *ctx)
        }
        if (!node->deleted &&
            (revents & (G_IO_OUT | G_IO_ERR)) &&
-            aio_node_check(ctx, node->is_external) &&
            node->io_write) {
            node->io_write(node->opaque);
            progress = true;
@@ -432,9 +257,7 @@ bool aio_poll(AioContext *ctx, bool blocking)

    /* fill pollfds */
    QLIST_FOREACH(node, &ctx->aio_handlers, node) {
-        if (!node->deleted && node->pfd.events
-            && !aio_epoll_enabled(ctx)
-            && aio_node_check(ctx, node->is_external)) {
+        if (!node->deleted && node->pfd.events) {
            add_pollfd(node);
        }
    }
@@ -445,17 +268,7 @@ bool aio_poll(AioContext *ctx, bool blocking)
    if (timeout) {
        aio_context_release(ctx);
    }
-    if (aio_epoll_check_poll(ctx, pollfds, npfd, timeout)) {
-        AioHandler epoll_handler;
-
-        epoll_handler.pfd.fd = ctx->epollfd;
-        epoll_handler.pfd.events = G_IO_IN | G_IO_OUT | G_IO_HUP | G_IO_ERR;
-        npfd = 0;
-        add_pollfd(&epoll_handler);
-        ret = aio_epoll(ctx, pollfds, npfd, timeout);
-    } else  {
-        ret = qemu_poll_ns(pollfds, npfd, timeout);
-    }
+    ret = qemu_poll_ns((GPollFD *)pollfds, npfd, timeout);
    if (blocking) {
        atomic_sub(&ctx->notify_me, 2);
    }
@@ -484,17 +297,3 @@ bool aio_poll(AioContext *ctx, bool blocking)

    return progress;
 }
-
-void aio_context_setup(AioContext *ctx)
-{
-#ifdef CONFIG_EPOLL_CREATE1
-    assert(!ctx->epollfd);
-    ctx->epollfd = epoll_create1(EPOLL_CLOEXEC);
-    if (ctx->epollfd == -1) {
-        fprintf(stderr, "Failed to create epoll instance: %s", strerror(errno));
-        ctx->epoll_available = false;
-    } else {
-        ctx->epoll_available = true;
-    }
-#endif
-}
@@ -15,7 +15,6 @@
 * 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"
@@ -29,13 +28,11 @@ 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,
                        void *opaque)
@@ -89,7 +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,
@@ -102,7 +98,6 @@ void aio_set_fd_handler(AioContext *ctx,

 void aio_set_event_notifier(AioContext *ctx,
                            EventNotifier *e,
-                            bool is_external,
                            EventNotifierHandler *io_notify)
 {
    AioHandler *node;
@@ -138,7 +133,6 @@ 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(&ctx->aio_handlers, node, node);

            g_source_add_poll(&ctx->source, &node->pfd);
@@ -310,8 +304,7 @@ bool aio_poll(AioContext *ctx, bool blocking)
    /* fill fd sets */
    count = 0;
    QLIST_FOREACH(node, &ctx->aio_handlers, node) {
-        if (!node->deleted && node->io_notify
-            && aio_node_check(ctx, node->is_external)) {
+        if (!node->deleted && node->io_notify) {
            events[count++] = event_notifier_get_handle(node->e);
        }
    }
@@ -370,7 +363,3 @@ bool aio_poll(AioContext *ctx, bool blocking)
    aio_context_release(ctx);
    return progress;
 }
-
-void aio_context_setup(AioContext *ctx)
-{
-}
@@ -21,19 +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/smbios/smbios.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;
@@ -261,7 +258,9 @@ void do_acpitable_option(const QemuOpts *opts)

    acpi_table_add(opts, &err);
    if (err) {
-        error_reportf_err(err, "Wrong acpi table provided: ");
+        error_report("Wrong acpi table provided: %s",
+                     error_get_pretty(err));
+        error_free(err);
        exit(1);
    }
 #endif
@@ -274,6 +273,13 @@ void do_smbios_option(QemuOpts *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
@@ -22,14 +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"

 /***********************************************************/
 /* bottom halves (can be seen as timers which expire ASAP) */
@@ -62,11 +59,6 @@ QEMUBH *aio_bh_new(AioContext *ctx, QEMUBHFunc *cb, void *opaque)
    return bh;
 }

-void aio_bh_call(QEMUBH *bh)
-{
-    bh->cb(bh->opaque);
-}
-
 /* Multiple occurrences of aio_bh_poll cannot be called concurrently */
 int aio_bh_poll(AioContext *ctx)
 {
@@ -92,7 +84,7 @@ int aio_bh_poll(AioContext *ctx)
                ret = 1;
            }
            bh->idle = 0;
-            aio_bh_call(bh);
+            bh->cb(bh->opaque);
        }
    }

@@ -218,7 +210,7 @@ aio_ctx_check(GSource *source)
    for (bh = ctx->first_bh; bh; bh = bh->next) {
        if (!bh->deleted && bh->scheduled) {
            return true;
-        }
+	}
    }
    return aio_pending(ctx) || (timerlistgroup_deadline_ns(&ctx->tlg) == 0);
 }
@@ -243,14 +235,6 @@ aio_ctx_finalize(GSource     *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
-
    qemu_mutex_lock(&ctx->bh_lock);
    while (ctx->first_bh) {
        QEMUBH *next = ctx->first_bh->next;
@@ -263,7 +247,7 @@ aio_ctx_finalize(GSource     *source)
    }
    qemu_mutex_unlock(&ctx->bh_lock);

-    aio_set_event_notifier(ctx, &ctx->notifier, false, NULL);
+    aio_set_event_notifier(ctx, &ctx->notifier, NULL);
    event_notifier_cleanup(&ctx->notifier);
    rfifolock_destroy(&ctx->lock);
    qemu_mutex_destroy(&ctx->bh_lock);
@@ -291,17 +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
@@ -347,23 +320,17 @@ 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);
    aio_set_event_notifier(ctx, &ctx->notifier,
-                           false,
                           (EventNotifierHandler *)
                           event_notifier_dummy_cb);
-#ifdef CONFIG_LINUX_AIO
-    ctx->linux_aio = NULL;
-#endif
    ctx->thread_pool = NULL;
    qemu_mutex_init(&ctx->bh_lock);
    rfifolock_init(&ctx->lock, aio_rfifolock_cb, ctx);
@@ -372,9 +339,6 @@ AioContext *aio_context_new(Error **errp)
    ctx->notify_dummy_bh = aio_bh_new(ctx, notify_dummy_bh, NULL);

    return ctx;
-fail:
-    g_source_destroy(&ctx->source);
-    return NULL;
 }

 void aio_context_ref(AioContext *ctx)
@@ -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"
@@ -21,13 +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"

 #define AUDIO_CAP "audio"
 #include "audio_int.h"
@@ -1131,6 +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;
@@ -1141,11 +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;
@@ -1156,7 +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)
@@ -1739,21 +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) {
@@ -1769,20 +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;
    }
 }

@@ -1810,9 +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);

@@ -1863,8 +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) {
@@ -1875,7 +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);
@@ -1977,7 +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;
@@ -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);
@@ -163,7 +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);
-
-#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"

@@ -22,9 +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 "audio.h"

 #define AUDIO_CAP "mixeng"
@@ -271,7 +269,7 @@ f_sample *mixeng_clip[2][2][2][3] = {
 * 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"
@@ -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"
@@ -21,8 +21,6 @@
 * 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"
@@ -305,7 +303,7 @@ static int baum_eat_packet(BaumDriverState *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 {\
@@ -337,7 +335,7 @@ static int baum_eat_packet(BaumDriverState *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;
@@ -563,12 +561,8 @@ static void baum_close(struct CharDriverState *chr)
    g_free(baum);
 }

-static CharDriverState *chr_baum_init(const char *id,
-                                      ChardevBackend *backend,
-                                      ChardevReturn *ret,
-                                      Error **errp)
+CharDriverState *chr_baum_init(void)
 {
-    ChardevCommon *common = backend->u.braille.data;
    BaumDriverState *baum;
    CharDriverState *chr;
    brlapi_handle_t *handle;
@@ -579,12 +573,8 @@ static CharDriverState *chr_baum_init(const char *id,
 #endif
    int tty;

-    chr = qemu_chr_alloc(common, errp);
-    if (!chr) {
-        return NULL;
-    }
    baum = g_malloc0(sizeof(BaumDriverState));
-    baum->chr = chr;
+    baum->chr = chr = qemu_chr_alloc();

    chr->opaque = baum;
    chr->chr_write = baum_write;
@@ -596,16 +586,14 @@ static CharDriverState *chr_baum_init(const char *id,

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

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

    if (brlapi__getDisplaySize(handle, &baum->x, &baum->y) == -1) {
-        error_setg(errp, "brlapi__getDisplaySize: %s",
-                   brlapi_strerror(brlapi_error_location()));
+        brlapi_perror("baum_init: brlapi_getDisplaySize");
        goto fail;
    }

@@ -621,8 +609,7 @@ static CharDriverState *chr_baum_init(const char *id,
        tty = BRLAPI_TTY_DEFAULT;

    if (brlapi__enterTtyMode(handle, tty, NULL) == -1) {
-        error_setg(errp, "brlapi__enterTtyMode: %s",
-                   brlapi_strerror(brlapi_error_location()));
+        brlapi_perror("baum_init: brlapi_enterTtyMode");
        goto fail;
    }

@@ -642,8 +629,7 @@ fail_handle:

 static void register_types(void)
 {
-    register_char_driver("braille", CHARDEV_BACKEND_KIND_BRAILLE, NULL,
-                         chr_baum_init);
+    register_char_driver("braille", CHARDEV_BACKEND_KIND_BRAILLE, NULL);
 }

 type_init(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"
@@ -52,14 +50,11 @@ 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
 }
@@ -88,7 +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);
 }

@@ -121,19 +118,11 @@ file_backend_instance_init(Object *o)
                            set_mem_path, NULL);
 }

-static void file_backend_instance_finalize(Object *o)
-{
-    HostMemoryBackendFile *fb = MEMORY_BACKEND_FILE(o);
-
-    g_free(fb->mem_path);
-}
-
 static const TypeInfo file_backend_info = {
    .name = TYPE_MEMORY_BACKEND_FILE,
    .parent = TYPE_MEMORY_BACKEND,
    .class_init = file_backend_class_init,
    .instance_init = file_backend_instance_init,
-    .instance_finalize = file_backend_instance_finalize,
    .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;
    }
@@ -64,17 +62,9 @@ out:
    error_propagate(errp, local_err);
 }

-static uint16List **host_memory_append_node(uint16List **node,
-                                            unsigned long value)
-{
-     *node = g_malloc0(sizeof(**node));
-     (*node)->value = value;
-     return &(*node)->next;
-}
-
 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;
@@ -82,35 +72,37 @@ host_memory_backend_get_host_nodes(Object *obj, Visitor *v, const char *name,
    unsigned long value;

    value = find_first_bit(backend->host_nodes, MAX_NODES);
-
-    node = host_memory_append_node(node, value);
-
    if (value == MAX_NODES) {
-        goto out;
+        return;
    }

+    *node = g_malloc0(sizeof(**node));
+    (*node)->value = value;
+    node = &(*node)->next;
+
    do {
        value = find_next_bit(backend->host_nodes, MAX_NODES, value + 1);
        if (value == MAX_NODES) {
            break;
        }

-        node = host_memory_append_node(node, value);
+        *node = g_malloc0(sizeof(**node));
+        (*node)->value = value;
+        node = &(*node)->next;
    } while (true);

-out:
-    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);
@@ -203,7 +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) {
@@ -224,11 +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, &local_err);
-        if (local_err) {
-            error_propagate(errp, local_err);
-            return;
-        }
+        os_mem_prealloc(fd, ptr, sz);
        backend->prealloc = true;
    }
 }
@@ -269,16 +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)
 {
@@ -291,7 +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);
@@ -335,11 +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.
@@ -347,21 +323,18 @@ 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,
-                            &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;
@@ -21,55 +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 {
-    CharDriverState *chr;
-    QemuInputHandlerState *hs;
-    int axis[INPUT_AXIS__MAX];
-    bool btns[INPUT_BUTTON__MAX];
-    bool btnc[INPUT_BUTTON__MAX];
-    uint8_t outbuf[32];
-    int outlen;
-} MouseState;
-
-static void msmouse_chr_accept_input(CharDriverState *chr)
+static void msmouse_event(void *opaque,
+                          int dx, int dy, int dz, int buttons_state)
 {
-    MouseState *mouse = chr->opaque;
-    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(MouseState *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);
@@ -77,54 +42,14 @@ static void msmouse_queue_event(MouseState *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 */
-    }
-}
-
-static void msmouse_input_event(DeviceState *dev, QemuConsole *src,
-                                InputEvent *evt)
-{
-    MouseState *mouse = (MouseState *)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)
-{
-    MouseState *mouse = (MouseState *)dev;
-
-    msmouse_queue_event(mouse);
-    msmouse_chr_accept_input(mouse->chr);
+    /* 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 int msmouse_chr_write (struct CharDriverState *s, const uint8_t *buf, int len)
@@ -135,51 +60,26 @@ static int msmouse_chr_write (struct CharDriverState *s, const uint8_t *buf, int

 static void msmouse_chr_close (struct CharDriverState *chr)
 {
-    MouseState *mouse = chr->opaque;
-
-    qemu_input_handler_unregister(mouse->hs);
-    g_free(mouse);
+    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 CharDriverState *qemu_chr_open_msmouse(const char *id,
-                                              ChardevBackend *backend,
-                                              ChardevReturn *ret,
-                                              Error **errp)
+CharDriverState *qemu_chr_open_msmouse(void)
 {
-    ChardevCommon *common = backend->u.msmouse.data;
-    MouseState *mouse;
    CharDriverState *chr;

-    chr = qemu_chr_alloc(common, errp);
-    if (!chr) {
-        return NULL;
-    }
+    chr = qemu_chr_alloc();
    chr->chr_write = msmouse_chr_write;
    chr->chr_close = msmouse_chr_close;
-    chr->chr_accept_input = msmouse_chr_accept_input;
    chr->explicit_be_open = true;

-    mouse = g_new0(MouseState, 1);
-    mouse->hs = qemu_input_handler_register((DeviceState *)mouse,
-                                            &msmouse_handler);
-
-    mouse->chr = chr;
-    chr->opaque = mouse;
+    qemu_add_mouse_event_handler(msmouse_event, chr, 0, "QEMU Microsoft Mouse");

    return chr;
 }

 static void register_types(void)
 {
-    register_char_driver("msmouse", CHARDEV_BACKEND_KIND_MSMOUSE, NULL,
-                         qemu_chr_open_msmouse);
+    register_char_driver("msmouse", CHARDEV_BACKEND_KIND_MSMOUSE, NULL);
 }

 type_init(register_types);
@@ -10,10 +10,8 @@
 * 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 */

@@ -26,12 +24,33 @@ typedef struct RngEgd

    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];
@@ -45,15 +64,24 @@ static void rng_egd_request_entropy(RngBackend *b, RngRequest *req)

        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;
    }

@@ -65,8 +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);
@@ -75,13 +103,38 @@ 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);
@@ -150,6 +203,8 @@ static void rng_egd_finalize(Object *obj)
    }

    g_free(s->chr_name);
+
+    rng_egd_free_requests(s);
 }

 static void rng_egd_class_init(ObjectClass *klass, void *data)
@@ -157,6 +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,
@@ -23,7 +23,6 @@
 * 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"

@@ -109,16 +108,13 @@ static void testdev_close(struct CharDriverState *chr)
    g_free(testdev);
 }

-static CharDriverState *chr_testdev_init(const char *id,
-                                         ChardevBackend *backend,
-                                         ChardevReturn *ret,
-                                         Error **errp)
+CharDriverState *chr_testdev_init(void)
 {
    TestdevCharState *testdev;
    CharDriverState *chr;

-    testdev = g_new0(TestdevCharState, 1);
-    testdev->chr = chr = g_new0(CharDriverState, 1);
+    testdev = g_malloc0(sizeof(TestdevCharState));
+    testdev->chr = chr = g_malloc0(sizeof(CharDriverState));

    chr->opaque = testdev;
    chr->chr_write = testdev_write;
@@ -129,8 +125,7 @@ static CharDriverState *chr_testdev_init(const char *id,

 static void register_types(void)
 {
-    register_char_driver("testdev", CHARDEV_BACKEND_KIND_TESTDEV, NULL,
-                         chr_testdev_init);
+    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"
@@ -24,7 +24,6 @@
 * THE SOFTWARE.
 */

-#include "qemu/osdep.h"
 #include "qemu-common.h"
 #include "exec/cpu-common.h"
 #include "sysemu/kvm.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)
 {
@@ -4,12 +4,12 @@ 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-$(CONFIG_VHDX) += vhdx.o vhdx-endian.o vhdx-log.o
 block-obj-y += quorum.o
-block-obj-y += parallels.o blkdebug.o blkverify.o blkreplay.o
+block-obj-y += parallels.o blkdebug.o blkverify.o
 block-obj-y += block-backend.o snapshot.o qapi.o
 block-obj-$(CONFIG_WIN32) += 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
@@ -20,12 +20,11 @@ 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 += crypto.o
-
 common-obj-y += stream.o
+common-obj-y += commit.o
 common-obj-y += backup.o

 iscsi.o-cflags     := $(LIBISCSI_CFLAGS)
@@ -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;
-}
@@ -50,8 +50,7 @@
 *
 */

-#include "qemu/osdep.h"
-#include "qemu/cutils.h"
+#include "qemu-common.h"
 #include "block/block_int.h"
 #include "qemu/error-report.h"
 #include "qemu/thread.h"
@@ -60,6 +59,7 @@
 #include "qapi/qmp/qjson.h"
 #include "qemu/atomic.h"

+#include <inttypes.h>
 #include <xseg/xseg.h>
 #include <xseg/protocol.h>

@@ -974,9 +974,11 @@ err_exit2:

 static int64_t qemu_archipelago_getlength(BlockDriverState *bs)
 {
+    int64_t ret;
    BDRVArchipelagoState *s = bs->opaque;

-    return archipelago_volume_info(s);
+    ret = archipelago_volume_info(s);
+    return ret;
 }

 static int qemu_archipelago_truncate(BlockDriverState *bs, int64_t offset)
@@ -11,20 +11,21 @@
 *
 */

-#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.h"
-#include "qapi/error.h"
 #include "qapi/qmp/qerror.h"
 #include "qemu/ratelimit.h"
-#include "qemu/cutils.h"
-#include "sysemu/block-backend.h"
-#include "qemu/bitmap.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 {
@@ -36,7 +37,7 @@ typedef struct CowRequest {

 typedef struct BackupBlockJob {
    BlockJob common;
-    BlockBackend *target;
+    BlockDriverState *target;
    /* bitmap for sync=incremental */
    BdrvDirtyBitmap *sync_bitmap;
    MirrorSyncMode sync_mode;
@@ -45,18 +46,10 @@ typedef struct BackupBlockJob {
    BlockdevOnError on_target_error;
    CoRwlock flush_rwlock;
    uint64_t sectors_read;
-    unsigned long *done_bitmap;
-    int64_t cluster_size;
-    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,
@@ -94,25 +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);

@@ -120,27 +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) {
@@ -150,11 +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, 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);
@@ -164,7 +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.
@@ -191,16 +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)
@@ -214,63 +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_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);
 }

 static const BlockJobDriver backup_job_driver = {
-    .instance_size          = sizeof(BackupBlockJob),
-    .job_type               = BLOCK_JOB_TYPE_BACKUP,
-    .set_speed              = backup_set_speed,
-    .commit                 = backup_commit,
-    .abort                  = backup_abort,
-    .attached_aio_context   = backup_attached_aio_context,
+    .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);
    }
 }

@@ -283,7 +239,7 @@ static void backup_complete(BlockJob *job, void *opaque)
    BackupBlockJob *s = container_of(job, BackupBlockJob, common);
    BackupCompleteData *data = opaque;

-    blk_unref(s->target);
+    bdrv_unref(s->target);

    block_job_completed(job, data->ret);
    g_free(data);
@@ -324,21 +280,21 @@ 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);
+    BlockDriverState *bs = job->common.bs;
    HBitmapIter hbi;

    granularity = bdrv_dirty_bitmap_granularity(job->sync_bitmap);
-    clusters_per_iter = MAX((granularity / job->cluster_size), 1);
+    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 = hbitmap_iter_next(&hbi)) != -1) {
-        cluster = sector / sectors_per_cluster;
+        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++) {
@@ -346,9 +302,8 @@ static int coroutine_fn backup_run_incremental(BackupBlockJob *job)
                if (yield_and_check(job)) {
                    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) {
@@ -359,17 +314,17 @@ static int coroutine_fn backup_run_incremental(BackupBlockJob *job)

        /* 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(&hbi, 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);
    }

    return ret;
@@ -379,28 +334,36 @@ static void coroutine_fn backup_run(void *opaque)
 {
    BackupBlockJob *job = opaque;
    BackupCompleteData *data;
-    BlockDriverState *bs = blk_bs(job->common.blk);
-    BlockBackend *target = job->target;
+    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);
@@ -419,7 +382,7 @@ static void coroutine_fn backup_run(void *opaque)
                /* 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.
@@ -428,8 +391,8 @@ 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 == 1 || n == 0) {
@@ -444,8 +407,8 @@ static void coroutine_fn backup_run(void *opaque)
                }
            }
            /* FULL sync mode we copy the whole drive. */
-            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 =
@@ -460,41 +423,60 @@ 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);

-    bdrv_op_unblock_all(blk_bs(target), job->common.blocker);
+    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);
 }

-void backup_start(const char *job_id, BlockDriverState *bs,
-                  BlockDriverState *target, int64_t speed,
-                  MirrorSyncMode sync_mode, BdrvDirtyBitmap *sync_bitmap,
+void backup_start(BlockDriverState *bs, BlockDriverState *target,
+                  int64_t speed, MirrorSyncMode sync_mode,
+                  BdrvDirtyBitmap *sync_bitmap,
                  BlockdevOnError on_source_error,
                  BlockdevOnError on_target_error,
                  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;
    }

+    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));
@@ -541,52 +523,27 @@ void backup_start(const char *job_id, BlockDriverState *bs,
        goto error;
    }

-    job = block_job_create(job_id, &backup_job_driver, bs, speed,
-                           cb, opaque, errp);
+    BackupBlockJob *job = block_job_create(&backup_job_driver, bs, speed,
+                                           cb, opaque, errp);
    if (!job) {
        goto error;
    }

-    job->target = blk_new();
-    blk_insert_bs(job->target, target);
+    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;
-
-    /* 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 < 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);
-    }
-
-    bdrv_op_block_all(target, job->common.blocker);
    job->common.len = len;
-    job->common.co = qemu_coroutine_create(backup_run, job);
-    block_job_txn_add_job(txn, &job->common);
-    qemu_coroutine_enter(job->common.co);
+    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) {
-        blk_unref(job->target);
-        block_job_unref(&job->common);
-    }
 }
@@ -22,9 +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"
@@ -32,17 +30,12 @@
 #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;
-    int align;

-    /* 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;
@@ -70,7 +63,7 @@ enum {
 };

 typedef struct BlkdebugRule {
-    BlkdebugEvent event;
+    BlkDebugEvent event;
    int action;
    int state;
    union {
@@ -149,12 +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;
        }
@@ -173,7 +223,7 @@ 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;

    /* Find the right event for the rule */
@@ -354,6 +404,7 @@ static int blkdebug_open(BlockDriverState *bs, QDict *options, int flags,
    BDRVBlkdebugState *s = bs->opaque;
    QemuOpts *opts;
    Error *local_err = NULL;
+    const char *config;
    uint64_t align;
    int ret;

@@ -366,8 +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;
    }
@@ -375,20 +426,20 @@ 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;
    }

    /* Set request alignment */
-    align = qemu_opt_get_size(opts, "align", 0);
-    if (align < INT_MAX && is_power_of_2(align)) {
-        s->align = align;
-    } else if (align) {
+    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;
@@ -398,11 +449,8 @@ static int blkdebug_open(BlockDriverState *bs, QDict *options, int flags,
    goto out;

 fail_unref:
-    bdrv_unref_child(bs, bs->file);
+    bdrv_unref(bs->file);
 out:
-    if (ret < 0) {
-        g_free(s->config_file);
-    }
    qemu_opts_del(opts);
    return ret;
 }
@@ -462,8 +510,7 @@ static BlockAIOCB *blkdebug_aio_readv(BlockDriverState *bs,
        return inject_error(bs, cb, opaque, rule);
    }

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

 static BlockAIOCB *blkdebug_aio_writev(BlockDriverState *bs,
@@ -485,8 +532,7 @@ static BlockAIOCB *blkdebug_aio_writev(BlockDriverState *bs,
        return inject_error(bs, cb, opaque, rule);
    }

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

 static BlockAIOCB *blkdebug_aio_flush(BlockDriverState *bs,
@@ -505,7 +551,7 @@ static BlockAIOCB *blkdebug_aio_flush(BlockDriverState *bs,
        return inject_error(bs, cb, opaque, rule);
    }

-    return bdrv_aio_flush(bs->file->bs, cb, opaque);
+    return bdrv_aio_flush(bs->file, cb, opaque);
 }


@@ -515,13 +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)
@@ -537,13 +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);
@@ -580,13 +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;
@@ -601,7 +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;
@@ -628,7 +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;
        }
    }
@@ -643,7 +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)) {
@@ -654,7 +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;
        }
    }
@@ -676,50 +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->bs, offset);
+    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]) {
+    if (!force_json && bs->file->exact_filename[0]) {
        snprintf(bs->exact_filename, sizeof(bs->exact_filename),
-                 "blkdebug:%s:%s", s->config_file ?: "",
-                 bs->file->bs->exact_filename);
+                 "blkdebug:%s:%s",
+                 qdict_get_try_str(bs->options, "config") ?: "",
+                 bs->file->exact_filename);
    }

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

-    QINCREF(bs->file->bs->full_open_options);
-    qdict_put_obj(opts, "image", QOBJECT(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));
        }
@@ -728,21 +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;
-    }
-}
-
-static int blkdebug_reopen_prepare(BDRVReopenState *reopen_state,
-                                   BlockReopenQueue *queue, Error **errp)
-{
-    return 0;
-}
-
 static BlockDriver bdrv_blkdebug = {
    .format_name            = "blkdebug",
    .protocol_name          = "blkdebug",
@@ -751,11 +781,9 @@ 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_getlength         = blkdebug_getlength,
    .bdrv_truncate          = blkdebug_truncate,
    .bdrv_refresh_filename  = blkdebug_refresh_filename,
-    .bdrv_refresh_limits    = blkdebug_refresh_limits,

    .bdrv_aio_readv         = blkdebug_aio_readv,
    .bdrv_aio_writev        = blkdebug_aio_writev,
@@ -1,160 +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;
-
-/* Next request id.
-   This counter is global, because requests from different
-   block devices should not get overlapping ids. */
-static uint64_t request_id;
-
-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:
-    if (ret < 0) {
-        bdrv_unref_child(bs, bs->file);
-    }
-    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;
-    qemu_coroutine_enter(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 = request_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 = request_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 = request_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 = request_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 = request_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_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);
@@ -7,16 +7,14 @@
 * 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 BlkverifyAIOCB BlkverifyAIOCB;
@@ -125,29 +123,26 @@ 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;
    }

    ret = 0;
 fail:
-    if (ret < 0) {
-        bdrv_unref_child(bs, bs->file);
-    }
    qemu_opts_del(opts);
    return ret;
 }
@@ -156,7 +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;
 }

@@ -164,7 +159,7 @@ 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 BlkverifyAIOCB *blkverify_aio_get(BlockDriverState *bs, bool is_write,
@@ -243,7 +238,7 @@ static BlockAIOCB *blkverify_aio_readv(BlockDriverState *bs,
                                            nb_sectors, cb, opaque);

    acb->verify = blkverify_verify_readv;
-    acb->buf = qemu_blockalign(bs->file->bs, qiov->size);
+    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);

@@ -276,7 +271,7 @@ static BlockAIOCB *blkverify_aio_flush(BlockDriverState *bs,
    BDRVBlkverifyState *s = bs->opaque;

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

 static bool blkverify_recurse_is_first_non_filter(BlockDriverState *bs,
@@ -284,44 +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_obj(opts, "driver", QOBJECT(qstring_from_str("blkverify")));

-        QINCREF(bs->file->bs->full_open_options);
-        qdict_put_obj(opts, "raw", QOBJECT(bs->file->bs->full_open_options));
-        QINCREF(s->test_file->bs->full_open_options);
-        qdict_put_obj(opts, "test",
-                      QOBJECT(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])
-    {
+    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->bs->exact_filename,
-                 s->test_file->bs->exact_filename);
+                 bs->file->exact_filename, s->test_file->exact_filename);
    }
 }

@@ -340,6 +345,9 @@ static BlockDriver bdrv_blkverify = {
    .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"

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

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

-    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) {
@@ -188,11 +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;
@@ -227,52 +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;
 }

@@ -287,8 +265,7 @@ static BlockDriver bdrv_bochs = {
    .instance_size	= sizeof(BDRVBochsState),
    .bdrv_probe		= bochs_probe,
    .bdrv_open		= bochs_open,
-    .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 */
@@ -66,7 +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->read_only = true;
+    bs->read_only = 1;

    /* read header */
    ret = bdrv_pread(bs->file, 128, &s->block_size, 4);
@@ -198,11 +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;
@@ -211,8 +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;
        }
@@ -235,38 +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;
 }

@@ -284,8 +271,7 @@ static BlockDriver bdrv_cloop = {
    .instance_size  = sizeof(BDRVCloopState),
    .bdrv_probe     = cloop_probe,
    .bdrv_open      = cloop_open,
-    .bdrv_refresh_limits = cloop_refresh_limits,
-    .bdrv_co_preadv = cloop_co_preadv,
+    .bdrv_read      = cloop_co_read,
    .bdrv_close     = cloop_close,
 };

@@ -12,14 +12,11 @@
 *
 */

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

 enum {
    /*
@@ -36,36 +33,28 @@ typedef struct CommitBlockJob {
    BlockJob common;
    RateLimit limit;
    BlockDriverState *active;
-    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;
    }

@@ -81,8 +70,8 @@ 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 *top = s->top;
+    BlockDriverState *base = s->base;
    BlockDriverState *overlay_bs;
    int ret = data->ret;

@@ -102,8 +91,6 @@ static void commit_complete(BlockJob *job, void *opaque)
        bdrv_reopen(overlay_bs, s->orig_overlay_flags, NULL);
    }
    g_free(s->backing_file_str);
-    blk_unref(s->top);
-    blk_unref(s->base);
    block_job_completed(&s->common, ret);
    g_free(data);
 }
@@ -112,39 +99,42 @@ 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);
+        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.
         */
@@ -153,20 +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;
@@ -175,10 +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;
@@ -208,8 +199,8 @@ static const BlockJobDriver commit_job_driver = {
    .set_speed     = commit_set_speed,
 };

-void commit_start(const char *job_id, BlockDriverState *bs,
-                  BlockDriverState *base, BlockDriverState *top, int64_t speed,
+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)
 {
@@ -220,6 +211,13 @@ void commit_start(const char *job_id, BlockDriverState *bs,
    BlockDriverState *overlay_bs;
    Error *local_err = NULL;

+    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) {
        error_setg(errp, "Invalid files for merge: top and base are the same");
@@ -233,40 +231,34 @@ void commit_start(const char *job_id, BlockDriverState *bs,
        return;
    }

-    s = block_job_create(job_id, &commit_job_driver, bs, speed,
-                         cb, opaque, 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_overlay_flags & BDRV_O_RDWR)) {
-        reopen_queue = bdrv_reopen_queue(reopen_queue, overlay_bs, NULL,
-                                         orig_overlay_flags | BDRV_O_RDWR);
-    }
    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,
+                                         orig_overlay_flags | BDRV_O_RDWR);
+    }
    if (reopen_queue) {
        bdrv_reopen_multiple(reopen_queue, &local_err);
        if (local_err != NULL) {
            error_propagate(errp, local_err);
-            block_job_unref(&s->common);
            return;
        }
    }


-    s->base = blk_new();
-    blk_insert_bs(s->base, base);
-
-    s->top = blk_new();
-    blk_insert_bs(s->top, top);
+    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;
@@ -275,129 +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, s);
+    s->common.co = qemu_coroutine_create(commit_run);

    trace_commit_start(bs, base, top, s, s->common.co, opaque);
-    qemu_coroutine_enter(s->common.co);
-}
-
-
-#define COMMIT_BUF_SECTORS 2048
-
-/* commit COW file into the raw image */
-int bdrv_commit(BlockDriverState *bs)
-{
-    BlockBackend *src, *backing;
-    BlockDriver *drv = bs->drv;
-    int64_t sector, total_sectors, length, backing_length;
-    int n, ro, open_flags;
-    int ret = 0;
-    uint8_t *buf = 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_insert_bs(src, bs);
-
-    backing = blk_new();
-    blk_insert_bs(backing, bs->backing->bs);
-
-    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);
-        if (ret < 0) {
-            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(src);
-    blk_unref(backing);
-
-    if (ro) {
-        /* ignoring error return here */
-        bdrv_reopen(bs->backing->bs, open_flags & ~BDRV_O_RDWR, NULL);
-    }
-
-    return ret;
+    qemu_coroutine_enter(s->common.co, s);
 }
@@ -1,635 +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"
-
-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",
-        },
-        { /* 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;
-
-    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->bs, offset);
-}
-
-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_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 */
@@ -73,6 +63,7 @@ static CURLMcode __curl_multi_socket_action(CURLM *multi_handle,

 #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
@@ -86,10 +77,6 @@ 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;

@@ -105,17 +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;
@@ -137,10 +119,6 @@ typedef struct BDRVCURLState {
    char *cookie;
    bool accept_range;
    AioContext *aio_context;
-    char *username;
-    char *password;
-    char *proxyusername;
-    char *proxypassword;
 } BDRVCURLState;

 static void curl_clean_state(CURLState *s);
@@ -169,44 +147,25 @@ static int curl_sock_cb(CURL *curl, curl_socket_t fd, int action,
 {
    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, 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, 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, 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);
+            aio_set_fd_handler(s->aio_context, fd, NULL, NULL, NULL);
            break;
    }

@@ -235,13 +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);
@@ -254,26 +212,15 @@ 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);
-            }
-
            acb->common.cb(acb->common.opaque, 0);
            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;
 }

 static int curl_find_buf(BDRVCURLState *s, size_t start, size_t len,
@@ -281,8 +228,6 @@ static int curl_find_buf(BDRVCURLState *s, size_t start, size_t len,
 {
    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];
@@ -297,15 +242,12 @@ 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;
@@ -315,13 +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]) {
@@ -391,7 +333,6 @@ static void curl_multi_check_completion(BDRVCURLState *s)
 static void curl_multi_do(void *arg)
 {
    CURLState *s = (CURLState *)arg;
-    CURLSocket *socket, *next_socket;
    int running;
    int r;

@@ -399,13 +340,10 @@ static void curl_multi_do(void *arg)
        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_read(void *arg)
@@ -478,21 +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.
@@ -509,7 +432,6 @@ static CURLState *curl_init_state(BlockDriverState *bs, BDRVCURLState *s)
 #endif
    }

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

    return state;
@@ -519,14 +441,6 @@ static void curl_clean_state(CURLState *s)
 {
    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;
 }

@@ -608,31 +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)
 {
@@ -643,7 +536,6 @@ static int curl_open(BlockDriverState *bs, QDict *options, int flags,
    const char *file;
    const char *cookie;
    double d;
-    const char *secretid;

    static int inited = 0;

@@ -685,26 +577,6 @@ static int curl_open(BlockDriverState *bs, QDict *options, int flags,
        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;
@@ -776,12 +648,12 @@ static void curl_readv_bh_cb(void *p)
    qemu_bh_delete(acb->bh);
    acb->bh = NULL;

-    size_t start = acb->sector_num * BDRV_SECTOR_SIZE;
+    size_t start = acb->sector_num * SECTOR_SIZE;
    size_t end;

    // 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:
            qemu_aio_unref(acb);
            // fall through
@@ -800,13 +672,13 @@ static void curl_readv_bh_cb(void *p)
    }

    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);
@@ -817,8 +689,8 @@ static void curl_readv_bh_cb(void *p)
    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);
@@ -1,387 +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 */
-    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 */
-    QLIST_ENTRY(BdrvDirtyBitmap) list;
-};
-
-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;
-}
-
-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));
-        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(!bdrv_dirty_bitmap_frozen(bm));
-            QLIST_REMOVE(bm, list);
-            hbitmap_free(bm->bitmap);
-            g_free(bm->name);
-            g_free(bm);
-
-            if (bitmap) {
-                return;
-            }
-        }
-    }
-}
-
-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);
-        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);
-}
-
-void bdrv_dirty_iter_init(BdrvDirtyBitmap *bitmap, HBitmapIter *hbi)
-{
-    hbitmap_iter_init(hbi, bitmap->bitmap, 0);
-}
-
-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);
-}
-
-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 an HBitmapIter to an arbitrary offset.
- */
-void bdrv_set_dirty_iter(HBitmapIter *hbi, int64_t offset)
-{
-    assert(hbi->hb);
-    hbitmap_iter_init(hbi, hbi->hb, offset);
-}
-
-int64_t bdrv_get_dirty_count(BdrvDirtyBitmap *bitmap)
-{
-    return hbitmap_count(bitmap->bitmap);
-}
@@ -21,8 +21,6 @@
 * 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"
@@ -32,6 +30,7 @@
 #ifdef CONFIG_BZIP2
 #include <bzlib.h>
 #endif
+#include <glib.h>

 enum {
    /* Limit chunk sizes to prevent unreasonable amounts of memory being used
@@ -153,9 +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];
@@ -179,7 +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;
@@ -439,8 +437,7 @@ static int dmg_open(BlockDriverState *bs, QDict *options, int flags,
    int64_t offset;
    int ret;

-    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 */
@@ -517,9 +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;
@@ -547,11 +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)
 {
@@ -665,42 +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;
 }
@@ -725,8 +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_co_preadv = dmg_co_preadv,
+    .bdrv_read      = dmg_co_read,
    .bdrv_close     = dmg_close,
 };

@@ -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;
@@ -42,15 +40,12 @@ 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;

@@ -64,7 +59,7 @@ struct LinuxAioState {
    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)
 {
@@ -74,7 +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;

@@ -88,18 +84,13 @@ 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) {
-        qemu_coroutine_enter(laiocb->co);
-    } else {
-        laiocb->common.cb(laiocb->common.opaque, ret);
-        qemu_aio_unref(laiocb);
-    }
+    qemu_aio_unref(laiocb);
 }

 /* The completion BH fetches completed I/O requests and invokes their
@@ -107,7 +98,7 @@ static void qemu_laio_process_completion(struct qemu_laiocb *laiocb)
 *
 * 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,
- * the completion events array and index are kept in LinuxAioState.  The BH
+ * 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
@@ -115,7 +106,7 @@ static void qemu_laio_process_completion(struct qemu_laiocb *laiocb)
 */
 static void qemu_laio_completion_bh(void *opaque)
 {
-    LinuxAioState *s = opaque;
+    struct qemu_laio_state *s = opaque;

    /* Fetch more completion events when empty */
    if (s->event_idx == s->event_max) {
@@ -130,7 +121,6 @@ static void qemu_laio_completion_bh(void *opaque)
            s->event_max = 0;
            return; /* no more events */
        }
-        s->io_q.in_flight -= s->event_max;
    }

    /* Reschedule so nested event loops see currently pending completions */
@@ -145,22 +135,20 @@ static void qemu_laio_completion_bh(void *opaque)
        laiocb->ret = io_event_ret(&s->events[s->event_idx]);
        s->event_idx++;

-        qemu_laio_process_completion(laiocb);
+        qemu_laio_process_completion(s, laiocb);
    }

    if (!s->io_q.plugged && !QSIMPLEQ_EMPTY(&s->io_q.pending)) {
        ioq_submit(s);
    }
-
-    qemu_bh_cancel(s->completion_bh);
 }

 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_completion_bh(s);
+        qemu_bh_schedule(s->completion_bh);
    }
 }

@@ -192,26 +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;
            }
        }
@@ -221,43 +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);
+    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:
@@ -270,83 +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,
-        .is_read    = (type == QEMU_AIO_READ),
-        .qiov       = qiov,
-    };
-
-    ret = laio_do_submit(fd, &laiocb, offset, type);
-    if (ret < 0) {
-        return ret;
-    }
-
-    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);
+    struct qemu_laio_state *s = s_;
+
+    aio_set_event_notifier(old_context, &s->e, NULL);
    qemu_bh_delete(s->completion_bh);
 }

-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);
+    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) {
@@ -368,8 +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) {
@@ -26,8 +26,8 @@
 * 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))
@@ -38,7 +38,7 @@ static void nbd_recv_coroutines_enter_all(NbdClientSession *s)

    for (i = 0; i < MAX_NBD_REQUESTS; i++) {
        if (s->recv_coroutine[i]) {
-            qemu_coroutine_enter(s->recv_coroutine[i]);
+            qemu_coroutine_enter(s->recv_coroutine[i], NULL);
        }
    }
 }
@@ -47,21 +47,13 @@ static void nbd_teardown_connection(BlockDriverState *bs)
 {
    NbdClientSession *client = nbd_get_client_session(bs);

-    if (!client->ioc) { /* Already closed */
-        return;
-    }
-
    /* finish any pending coroutines */
-    qio_channel_shutdown(client->ioc,
-                         QIO_CHANNEL_SHUTDOWN_BOTH,
-                         NULL);
+    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 void nbd_reply_ready(void *opaque)
@@ -71,16 +63,12 @@ static void nbd_reply_ready(void *opaque)
    uint64_t i;
    int ret;

-    if (!s->ioc) { /* Already closed */
-        return;
-    }
-
    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.
         */
-        ret = nbd_receive_reply(s->ioc, &s->reply);
+        ret = nbd_receive_reply(s->sock, &s->reply);
        if (ret == -EAGAIN) {
            return;
        }
@@ -99,7 +87,7 @@ static void nbd_reply_ready(void *opaque)
    }

    if (s->recv_coroutine[i]) {
-        qemu_coroutine_enter(s->recv_coroutine[i]);
+        qemu_coroutine_enter(s->recv_coroutine[i], NULL);
        return;
    }

@@ -111,12 +99,12 @@ static void nbd_restart_write(void *opaque)
 {
    BlockDriverState *bs = opaque;

-    qemu_coroutine_enter(nbd_get_client_session(bs)->send_coroutine);
+    qemu_coroutine_enter(nbd_get_client_session(bs)->send_coroutine, NULL);
 }

 static int nbd_co_send_request(BlockDriverState *bs,
                               struct nbd_request *request,
-                               QEMUIOVector *qiov)
+                               QEMUIOVector *qiov, int offset)
 {
    NbdClientSession *s = nbd_get_client_session(bs);
    AioContext *aio_context;
@@ -131,45 +119,40 @@ 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);
-
-    if (!s->ioc) {
-        qemu_co_mutex_unlock(&s->send_mutex);
-        return -EPIPE;
-    }
-
    s->send_coroutine = qemu_coroutine_self();
    aio_context = bdrv_get_aio_context(bs);

-    aio_set_fd_handler(aio_context, s->sioc->fd, false,
+    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->sioc->fd, false,
-                       nbd_reply_ready, NULL, bs);
+    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,
-                                 struct nbd_request *request,
-                                 struct nbd_reply *reply,
-                                 QEMUIOVector *qiov)
+    struct nbd_request *request, struct nbd_reply *reply,
+    QEMUIOVector *qiov, int offset)
 {
    int ret;

@@ -177,13 +160,12 @@ static void nbd_co_receive_reply(NbdClientSession *s,
     * 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;
            }
@@ -218,60 +200,94 @@ static void nbd_coroutine_end(NbdClientSession *s,
    }
 }

-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);
-    struct nbd_request request = {
-        .type = NBD_CMD_READ,
-        .from = offset,
-        .len = bytes,
-    };
+    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(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);
-    struct nbd_request request = {
-        .type = NBD_CMD_WRITE,
-        .from = offset,
-        .len = bytes,
-    };
-    struct nbd_reply reply;
-    ssize_t ret;
-
-    if (flags & BDRV_REQ_FUA) {
-        assert(client->nbdflags & NBD_FLAG_SEND_FUA);
-        request.type |= 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;
    }
+    return nbd_co_readv_1(bs, sector_num, nb_sectors, qiov, offset);
+}

-    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);
+int nbd_client_co_writev(BlockDriverState *bs, int64_t sector_num,
+                         int nb_sectors, QEMUIOVector *qiov)
+{
+    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;
    }
-    nbd_coroutine_end(client, &request);
-    return -reply.error;
+    return nbd_co_writev_1(bs, sector_num, nb_sectors, qiov, offset);
 }

 int nbd_client_co_flush(BlockDriverState *bs)
@@ -285,41 +301,44 @@ int nbd_client_co_flush(BlockDriverState *bs)
        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(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);
-    struct nbd_request request = {
-        .type = NBD_CMD_TRIM,
-        .from = offset,
-        .len = count,
-    };
+    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(client, &request);
    return -reply.error;
@@ -329,15 +348,14 @@ int nbd_client_co_pdiscard(BlockDriverState *bs, int64_t offset, int count)
 void nbd_client_detach_aio_context(BlockDriverState *bs)
 {
    aio_set_fd_handler(bdrv_get_aio_context(bs),
-                       nbd_get_client_session(bs)->sioc->fd,
-                       false, NULL, NULL, NULL);
+                       nbd_get_client_session(bs)->sock, NULL, NULL, NULL);
 }

 void nbd_client_attach_aio_context(BlockDriverState *bs,
                                   AioContext *new_context)
 {
-    aio_set_fd_handler(new_context, nbd_get_client_session(bs)->sioc->fd,
-                       false, nbd_reply_ready, NULL, bs);
+    aio_set_fd_handler(new_context, nbd_get_client_session(bs)->sock,
+                       nbd_reply_ready, NULL, bs);
 }

 void nbd_client_close(BlockDriverState *bs)
@@ -349,20 +367,16 @@ void nbd_client_close(BlockDriverState *bs)
        .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);
@@ -370,35 +384,22 @@ int nbd_client_init(BlockDriverState *bs,

    /* 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;
-    }

    qemu_co_mutex_init(&client->send_mutex);
    qemu_co_mutex_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));
-    }
+    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);
-
+    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 */

@@ -18,9 +17,8 @@
 #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;
+    int sock;
+    uint32_t nbdflags;
    off_t size;

    CoMutex send_mutex;
@@ -36,20 +34,17 @@ typedef struct NbdClientSession {

 NbdClientSession *nbd_get_client_session(BlockDriverState *bs);

-int nbd_client_init(BlockDriverState *bs,
-                    QIOChannelSocket *sock,
-                    const char *export_name,
-                    QCryptoTLSCreds *tlscreds,
-                    const char *hostname,
+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_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,
@@ -26,25 +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 "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() */
-    char *path, *host, *port, *export, *tlscredsid;
+    QemuOpts *socket_opts;
 } BDRVNBDState;

 static int nbd_parse_uri(const char *filename, QDict *options)
@@ -191,48 +190,39 @@ out:
    g_free(file);
 }

-static SocketAddress *nbd_config(BDRVNBDState *s, QemuOpts *opts, Error **errp)
+static void nbd_config(BDRVNBDState *s, QDict *options, char **export,
+                       Error **errp)
 {
-    SocketAddress *saddr;
+    Error *local_err = NULL;

-    s->path = g_strdup(qemu_opt_get(opts, "path"));
-    s->host = g_strdup(qemu_opt_get(opts, "host"));
-
-    if (!s->path == !s->host) {
-        if (s->path) {
+    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 NULL;
+        return;
    }

-    saddr = g_new0(SocketAddress, 1);
+    s->client.is_unix = qdict_haskey(options, "path");
+    s->socket_opts = qemu_opts_create(&socket_optslist, NULL, 0,
+                                      &error_abort);

-    if (s->path) {
-        UnixSocketAddress *q_unix;
-        saddr->type = SOCKET_ADDRESS_KIND_UNIX;
-        q_unix = saddr->u.q_unix.data = g_new0(UnixSocketAddress, 1);
-        q_unix->path = g_strdup(s->path);
-    } else {
-        InetSocketAddress *inet;
-
-        s->port = g_strdup(qemu_opt_get(opts, "port"));
-
-        saddr->type = SOCKET_ADDRESS_KIND_INET;
-        inet = saddr->u.inet.data = g_new0(InetSocketAddress, 1);
-        inet->host = g_strdup(s->host);
-        inet->port = g_strdup(s->port);
-        if (!inet->port) {
-            inet->port = g_strdup_printf("%d", NBD_DEFAULT_PORT);
-        }
+    qemu_opts_absorb_qdict(s->socket_opts, options, &local_err);
+    if (local_err) {
+        error_propagate(errp, local_err);
+        return;
    }

-    s->client.is_unix = saddr->type == SOCKET_ADDRESS_KIND_UNIX;
+    if (!qemu_opt_get(s->socket_opts, "port")) {
+        qemu_opt_set_number(s->socket_opts, "port", NBD_DEFAULT_PORT,
+                            &error_abort);
+    }

-    s->export = g_strdup(qemu_opt_get(opts, "export"));
-
-    return saddr;
+    *export = g_strdup(qdict_get_try_str(options, "export"));
+    if (*export) {
+        qdict_del(options, "export");
+    }
 }

 NbdClientSession *nbd_get_client_session(BlockDriverState *bs)
@@ -241,158 +231,69 @@ NbdClientSession *nbd_get_client_session(BlockDriverState *bs)
    return &s->client;
 }

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

-    sioc = qio_channel_socket_new();
-
-    qio_channel_socket_connect_sync(sioc,
-                                    saddr,
-                                    &local_err);
-    if (local_err) {
-        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;
-    SocketAddress *saddr = 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;
-    }

    /* Pop the config into our state object. Exit if invalid. */
-    saddr = nbd_config(s, opts, errp);
-    if (!saddr) {
-        goto error;
-    }
-
-    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;
-        }
-
-        if (saddr->type != SOCKET_ADDRESS_KIND_INET) {
-            error_setg(errp, "TLS only supported over IP sockets");
-            goto error;
-        }
-        hostname = saddr->u.inet.data->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(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) {
-        g_free(s->path);
-        g_free(s->host);
-        g_free(s->port);
-        g_free(s->export);
-        g_free(s->tlscredsid);
-    }
-    qapi_free_SocketAddress(saddr);
-    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)
@@ -402,21 +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_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);
-
-    g_free(s->path);
-    g_free(s->host);
-    g_free(s->port);
-    g_free(s->export);
-    g_free(s->tlscredsid);
 }

 static int64_t nbd_getlength(BlockDriverState *bs)
@@ -437,47 +339,46 @@ 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();
+    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");

    qdict_put_obj(opts, "driver", QOBJECT(qstring_from_str("nbd")));

-    if (s->path && s->export) {
+    if (path && export) {
        snprintf(bs->exact_filename, sizeof(bs->exact_filename),
-                 "nbd+unix:///%s?socket=%s", s->export, s->path);
-    } else if (s->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", s->path);
-    } else if (!s->path && s->export && s->port) {
+                 "nbd+unix://?socket=%s", path);
+    } else if (!path && export && port) {
        snprintf(bs->exact_filename, sizeof(bs->exact_filename),
-                 "nbd://%s:%s/%s", s->host, s->port, s->export);
-    } else if (!s->path && s->export && !s->port) {
+                 "nbd://%s:%s/%s", host, port, export);
+    } else if (!path && export && !port) {
        snprintf(bs->exact_filename, sizeof(bs->exact_filename),
-                 "nbd://%s/%s", s->host, s->export);
-    } else if (!s->path && !s->export && s->port) {
+                 "nbd://%s/%s", host, export);
+    } else if (!path && !export && port) {
        snprintf(bs->exact_filename, sizeof(bs->exact_filename),
-                 "nbd://%s:%s", s->host, s->port);
-    } else if (!s->path && !s->export && !s->port) {
+                 "nbd://%s:%s", host, port);
+    } else if (!path && !export && !port) {
        snprintf(bs->exact_filename, sizeof(bs->exact_filename),
-                 "nbd://%s", s->host);
+                 "nbd://%s", host);
    }

-    if (s->path) {
-        qdict_put_obj(opts, "path", QOBJECT(qstring_from_str(s->path)));
-    } else if (s->port) {
-        qdict_put_obj(opts, "host", QOBJECT(qstring_from_str(s->host)));
-        qdict_put_obj(opts, "port", QOBJECT(qstring_from_str(s->port)));
+    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(s->host)));
+        qdict_put_obj(opts, "host", QOBJECT(qstring_from_str(host)));
    }
-    if (s->export) {
-        qdict_put_obj(opts, "export", QOBJECT(qstring_from_str(s->export)));
-    }
-    if (s->tlscredsid) {
-        qdict_put_obj(opts, "tls-creds",
-                      QOBJECT(qstring_from_str(s->tlscredsid)));
+    if (export) {
+        qdict_put_obj(opts, "export", QOBJECT(qstring_from_str(export)));
    }

    bs->full_open_options = opts;
@@ -489,11 +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_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,
@@ -507,11 +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_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,
@@ -525,11 +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_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
@@ -22,24 +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 <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;
@@ -47,8 +43,6 @@ typedef struct NFSClient {
    int events;
    bool has_zero_init;
    AioContext *aio_context;
-    blkcnt_t st_blocks;
-    bool cache_used;
 } NFSClient;

 typedef struct NFSRPC {
@@ -68,10 +62,11 @@ 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, client);
+                           (ev & POLLOUT) ? nfs_process_write : NULL,
+                           client);

    }
    client->events = ev;
@@ -104,7 +99,7 @@ static void nfs_co_generic_bh_cb(void *opaque)
    NFSRPC *task = opaque;
    task->complete = 1;
    qemu_bh_delete(task->bh);
-    qemu_coroutine_enter(task->co);
+    qemu_coroutine_enter(task->co, NULL);
 }

 static void
@@ -246,8 +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);
+    aio_set_fd_handler(client->aio_context,
+                       nfs_get_fd(client->context),
+                       NULL, NULL, NULL);
    client->events = 0;
 }

@@ -266,8 +262,9 @@ static void nfs_client_close(NFSClient *client)
        if (client->fh) {
            nfs_close(client->context, client->fh);
        }
-        aio_set_fd_handler(client->aio_context, nfs_get_fd(client->context),
-                           false, NULL, NULL, NULL);
+        aio_set_fd_handler(client->aio_context,
+                           nfs_get_fd(client->context),
+                           NULL, NULL, NULL);
        nfs_destroy_context(client->context);
    }
    memset(client, 0, sizeof(NFSClient));
@@ -280,7 +277,7 @@ static void nfs_file_close(BlockDriverState *bs)
 }

 static int64_t nfs_client_open(NFSClient *client, const char *filename,
-                               int flags, Error **errp, int open_flags)
+                               int flags, Error **errp)
 {
    int ret = -EINVAL, i;
    struct stat st;
@@ -332,49 +329,12 @@ static int64_t nfs_client_open(NFSClient *client, const char *filename,
            nfs_set_tcp_syncnt(client->context, val);
 #ifdef LIBNFS_FEATURE_READAHEAD
        } else if (!strcmp(qp->p[i].name, "readahead")) {
-            if (open_flags & BDRV_O_NOCACHE) {
-                error_setg(errp, "Cannot enable NFS readahead "
-                                 "if cache.direct = on");
-                goto fail;
-            }
            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);
-#ifdef LIBNFS_FEATURE_PAGECACHE
-            nfs_set_pagecache_ttl(client->context, 0);
-#endif
-            client->cache_used = true;
-#endif
-#ifdef LIBNFS_FEATURE_PAGECACHE
-            nfs_set_pagecache_ttl(client->context, 0);
-        } else if (!strcmp(qp->p[i].name, "pagecache")) {
-            if (open_flags & BDRV_O_NOCACHE) {
-                error_setg(errp, "Cannot enable NFS pagecache "
-                                 "if cache.direct = on");
-                goto fail;
-            }
-            if (val > QEMU_NFS_MAX_PAGECACHE_SIZE) {
-                error_report("NFS Warning: Truncating NFS pagecache"
-                             " size to %d pages", QEMU_NFS_MAX_PAGECACHE_SIZE);
-                val = QEMU_NFS_MAX_PAGECACHE_SIZE;
-            }
-            nfs_set_pagecache(client->context, val);
-            nfs_set_pagecache_ttl(client->context, 0);
-            client->cache_used = true;
-#endif
-#ifdef LIBNFS_FEATURE_DEBUG
-        } else if (!strcmp(qp->p[i].name, "debug")) {
-            /* limit the maximum debug level to avoid potential flooding
-             * of our log files. */
-            if (val > QEMU_NFS_MAX_DEBUG_LEVEL) {
-                error_report("NFS Warning: Limiting NFS debug level"
-                             " to %d", QEMU_NFS_MAX_DEBUG_LEVEL);
-                val = QEMU_NFS_MAX_DEBUG_LEVEL;
-            }
-            nfs_set_debug(client->context, val);
 #endif
        } else {
            error_setg(errp, "Unknown NFS parameter name: %s",
@@ -414,7 +374,6 @@ static int64_t nfs_client_open(NFSClient *client, const char *filename,
    }

    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);
    goto out;
 fail:
@@ -446,7 +405,7 @@ static int nfs_file_open(BlockDriverState *bs, QDict *options, int flags,
    }
    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) {
        goto out;
    }
@@ -482,7 +441,7 @@ 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);

-    ret = nfs_client_open(client, url, O_CREAT, errp, 0);
+    ret = nfs_client_open(client, url, O_CREAT, errp);
    if (ret < 0) {
        goto out;
    }
@@ -505,11 +464,6 @@ static int64_t nfs_get_allocated_file_size(BlockDriverState *bs)
    NFSRPC task = {0};
    struct stat st;

-    if (bdrv_is_read_only(bs) &&
-        !(bs->open_flags & BDRV_O_NOCACHE)) {
-        return client->st_blocks * 512;
-    }
-
    task.st = &st;
    if (nfs_fstat_async(client->context, client->fh, nfs_co_generic_cb,
                        &task) != 0) {
@@ -530,49 +484,6 @@ 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;
-}
-
-#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",
@@ -588,7 +499,6 @@ 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_readv                  = nfs_co_readv,
    .bdrv_co_writev                 = nfs_co_writev,
@@ -596,10 +506,6 @@ static BlockDriver bdrv_nfs = {

    .bdrv_detach_aio_context        = nfs_detach_aio_context,
    .bdrv_attach_aio_context        = nfs_attach_aio_context,
-
-#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);
 }

@@ -176,12 +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);
 }

@@ -207,38 +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(opts, "driver", qstring_from_str(bs->drv->format_name));
-    bs->full_open_options = opts;
-}
-
 static BlockDriver bdrv_null_co = {
    .format_name            = "null-co",
    .protocol_name          = "null-co",
@@ -252,10 +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 = {
@@ -271,10 +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[] = {
@@ -205,17 +200,15 @@ static int64_t allocate_clusters(BlockDriverState *bs, int64_t sector_num,
        return -EINVAL;
    }

-    to_allocate = DIV_ROUND_UP(sector_num + *pnum, s->tracks) - idx;
+    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->bs,
+            ret = bdrv_truncate(bs->file,
                                (s->data_end + space) << BDRV_SECTOR_BITS);
        }
        if (ret < 0) {
@@ -227,7 +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;
@@ -251,8 +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;
@@ -267,7 +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;
@@ -280,7 +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;
 }
@@ -378,7 +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;
@@ -449,7 +440,7 @@ static int parallels_check(BlockDriverState *bs, BdrvCheckResult *res,
                size - res->image_end_offset);
        res->leaks += count;
        if (fix & BDRV_FIX_LEAKS) {
-            ret = bdrv_truncate(bs->file->bs, res->image_end_offset);
+            ret = bdrv_truncate(bs->file, res->image_end_offset);
            if (ret < 0) {
                res->check_errors++;
                return ret;
@@ -467,7 +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;
@@ -476,10 +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) {
@@ -487,16 +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_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);
+    ret = bdrv_truncate(file, 0);
    if (ret < 0) {
        goto exit;
    }
@@ -520,19 +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:
@@ -562,8 +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;
@@ -620,8 +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;
@@ -675,13 +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 (!bdrv_has_zero_init(bs->file->bs) ||
-            bdrv_truncate(bs->file->bs, bdrv_getlength(bs->file->bs)) != 0) {
+    if (!bdrv_has_zero_init(bs->file) ||
+            bdrv_truncate(bs->file, bdrv_getlength(bs->file)) != 0) {
        s->prealloc_mode = PRL_PREALLOC_MODE_FALLOCATE;
    }

@@ -724,7 +707,7 @@ static void parallels_close(BlockDriverState *bs)
    }

    if (bs->open_flags & BDRV_O_RDWR) {
-        bdrv_truncate(bs->file->bs, s->data_end << BDRV_SECTOR_BITS);
+        bdrv_truncate(bs->file, s->data_end << BDRV_SECTOR_BITS);
    }

    g_free(s->bat_dirty_bmap);
@@ -22,7 +22,6 @@
 * THE SOFTWARE.
 */

-#include "qemu/osdep.h"
 #include "block/qapi.h"
 #include "block/block_int.h"
 #include "block/throttle-groups.h"
@@ -32,10 +31,8 @@
 #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),
    };
@@ -67,10 +64,10 @@ BlockDeviceInfo *bdrv_block_device_info(BlockBackend *blk,
    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;
@@ -94,31 +91,11 @@ 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);
@@ -133,8 +110,8 @@ BlockDeviceInfo *bdrv_block_device_info(BlockBackend *blk,
            qapi_free_BlockDeviceInfo(info);
            return NULL;
        }
-        if (bs0->drv && bs0->backing) {
-            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 {
@@ -233,13 +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 size of device '%s'",
                         bdrv_get_device_name(bs));
-        goto out;
+        return;
    }

    info = g_new0(ImageInfo, 1);
@@ -270,18 +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;
        }

@@ -307,13 +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. */
@@ -327,24 +296,24 @@ static void bdrv_query_info(BlockBackend *blk, BlockInfo **p_info,
    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;
        }
@@ -357,115 +326,45 @@ static void bdrv_query_info(BlockBackend *blk, BlockInfo **p_info,
    qapi_free_BlockInfo(info);
 }

-static BlockStats *bdrv_query_stats(BlockBackend *blk,
-                                    const BlockDriverState *bs,
-                                    bool query_backing);
-
-static void bdrv_query_blk_stats(BlockDeviceStats *ds, BlockBackend *blk)
-{
-    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 void bdrv_query_bds_stats(BlockStats *s, const BlockDriverState *bs,
-                                 bool query_backing)
-{
-    if (bdrv_get_node_name(bs)[0]) {
-        s->has_node_name = true;
-        s->node_name = g_strdup(bdrv_get_node_name(bs));
-    }
-
-    s->stats->wr_highest_offset = bs->wr_highest_offset;
-
-    if (bs->file) {
-        s->has_parent = true;
-        s->parent = bdrv_query_stats(NULL, bs->file->bs, query_backing);
-    }
-
-    if (query_backing && bs->backing) {
-        s->has_backing = true;
-        s->backing = bdrv_query_stats(NULL, bs->backing->bs, query_backing);
-    }
-
-}
-
-static BlockStats *bdrv_query_stats(BlockBackend *blk,
-                                    const BlockDriverState *bs,
+static BlockStats *bdrv_query_stats(const BlockDriverState *bs,
                                    bool query_backing)
 {
    BlockStats *s;

    s = g_malloc0(sizeof(*s));
-    s->stats = g_malloc0(sizeof(*s->stats));

-    if (blk) {
+    if (bdrv_get_device_name(bs)[0]) {
        s->has_device = true;
-        s->device = g_strdup(blk_name(blk));
-        bdrv_query_blk_stats(s->stats, blk);
+        s->device = g_strdup(bdrv_get_device_name(bs));
    }
-    if (bs) {
-        bdrv_query_bds_stats(s, bs, query_backing);
+
+    if (bdrv_get_node_name(bs)[0]) {
+        s->has_node_name = true;
+        s->node_name = g_strdup(bdrv_get_node_name(bs));
+    }
+
+    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_stats(bs->file, query_backing);
+    }
+
+    if (query_backing && bs->backing_hd) {
+        s->has_backing = true;
+        s->backing = bdrv_query_stats(bs->backing_hd, query_backing);
    }

    return s;
@@ -482,9 +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;
@@ -492,20 +389,10 @@ BlockInfoList *qmp_query_block(Error **errp)
    }

    return head;
-}

-static bool next_query_bds(BlockBackend **blk, BlockDriverState **bs,
-                           bool query_nodes)
-{
-    if (query_nodes) {
-        *bs = bdrv_next_node(*bs);
-        return !!*bs;
-    }
-
-    *blk = blk_next(*blk);
-    *bs = *blk ? blk_bs(*blk) : NULL;
-
-    return !!*blk;
+ err:
+    qapi_free_BlockInfoList(head);
+    return NULL;
 }

 BlockStatsList *qmp_query_blockstats(bool has_query_nodes,
@@ -513,19 +400,17 @@ BlockStatsList *qmp_query_blockstats(bool has_query_nodes,
                                     Error **errp)
 {
    BlockStatsList *head = NULL, **p_next = &head;
-    BlockBackend *blk = NULL;
    BlockDriverState *bs = NULL;

    /* Just to be safe if query_nodes is not always initialized */
    query_nodes = has_query_nodes && query_nodes;

-    while (next_query_bds(&blk, &bs, query_nodes)) {
+    while ((bs = query_nodes ? bdrv_next_node(bs) : bdrv_next(bs))) {
        BlockStatsList *info = g_malloc0(sizeof(*info));
-        AioContext *ctx = blk ? blk_get_aio_context(blk)
-                              : bdrv_get_aio_context(bs);
+        AioContext *ctx = bdrv_get_aio_context(bs);

        aio_context_acquire(ctx);
-        info->value = bdrv_query_stats(blk, bs, !query_nodes);
+        info->value = bdrv_query_stats(bs, !query_nodes);
        aio_context_release(ctx);

        *p_next = info;
@@ -650,10 +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");
@@ -667,9 +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 */
@@ -677,28 +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 = qmp_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);
-    visit_free(v);
+    qmp_output_visitor_cleanup(ov);
 }

 void bdrv_image_info_dump(fprintf_function func_fprintf, void *f,
@@ -736,10 +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"
@@ -124,7 +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;
    }
@@ -160,21 +159,7 @@ static int qcow_open(BlockDriverState *bs, QDict *options, int flags,
    }
    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;
@@ -220,7 +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");
@@ -384,7 +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 */
@@ -424,8 +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;
    }
@@ -446,21 +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->bs, cluster_offset + s->cluster_size);
+                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 &&
@@ -480,8 +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;
                        }
@@ -503,7 +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;
@@ -524,7 +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;
 }

@@ -613,13 +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;
@@ -793,7 +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),
@@ -809,17 +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_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);
+    ret = bdrv_truncate(qcow_bs, 0);
    if (ret < 0) {
        goto exit;
    }
@@ -859,24 +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;
@@ -886,7 +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;
@@ -902,7 +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->bs, s->l1_table_offset + l1_length);
+    ret = bdrv_truncate(bs->file, s->l1_table_offset + l1_length);
    if (ret < 0)
        return ret;

@@ -913,49 +893,6 @@ static int qcow_make_empty(BlockDriverState *bs)
    return 0;
 }

-typedef struct QcowWriteCo {
-    BlockDriverState *bs;
-    int64_t sector_num;
-    const uint8_t *buf;
-    int nb_sectors;
-    int ret;
-} QcowWriteCo;
-
-static void qcow_write_co_entry(void *opaque)
-{
-    QcowWriteCo *co = opaque;
-    QEMUIOVector qiov;
-
-    struct iovec iov = (struct iovec) {
-        .iov_base   = (uint8_t*) co->buf,
-        .iov_len    = co->nb_sectors * BDRV_SECTOR_SIZE,
-    };
-    qemu_iovec_init_external(&qiov, &iov, 1);
-
-    co->ret = qcow_co_writev(co->bs, co->sector_num, co->nb_sectors, &qiov);
-}
-
-/* Wrapper for non-coroutine contexts */
-static int qcow_write(BlockDriverState *bs, int64_t sector_num,
-                      const uint8_t *buf, int nb_sectors)
-{
-    Coroutine *co;
-    AioContext *aio_context = bdrv_get_aio_context(bs);
-    QcowWriteCo data = {
-        .bs         = bs,
-        .sector_num = sector_num,
-        .buf        = buf,
-        .nb_sectors = nb_sectors,
-        .ret        = -EINPROGRESS,
-    };
-    co = qemu_coroutine_create(qcow_write_co_entry, &data);
-    qemu_coroutine_enter(co);
-    while (data.ret == -EINPROGRESS) {
-        aio_poll(aio_context, true);
-    }
-    return data.ret;
-}
-
 /* XXX: put compressed sectors first, then all the cluster aligned
   tables to avoid losing bytes in alignment */
 static int qcow_write_compressed(BlockDriverState *bs, int64_t sector_num,
@@ -983,7 +920,7 @@ static int qcow_write_compressed(BlockDriverState *bs, int64_t sector_num,
        return ret;
    }

-    out_buf = g_malloc(s->cluster_size);
+    out_buf = g_malloc(s->cluster_size + (s->cluster_size / 1000) + 128);

    /* best compression, small window, no zlib header */
    memset(&strm, 0, sizeof(strm));
@@ -1012,7 +949,7 @@ static int qcow_write_compressed(BlockDriverState *bs, int64_t sector_num,

    if (ret != Z_STREAM_END || out_len >= s->cluster_size) {
        /* could not compress: write normal cluster */
-        ret = qcow_write(bs, sector_num, buf, s->cluster_sectors);
+        ret = bdrv_write(bs, sector_num, buf, s->cluster_sectors);
        if (ret < 0) {
            goto fail;
        }
@@ -22,8 +22,6 @@
 * THE SOFTWARE.
 */

-/* Needed for CONFIG_MADVISE */
-#include "qemu/osdep.h"
 #include "block/block_int.h"
 #include "qemu-common.h"
 #include "qcow2.h"
@@ -31,9 +29,9 @@

 typedef struct Qcow2CachedTable {
    int64_t  offset;
+    bool     dirty;
    uint64_t lru_counter;
    int      ref;
-    bool     dirty;
 } Qcow2CachedTable;

 struct Qcow2Cache {
@@ -43,85 +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)
-{
-#if QEMU_MADV_DONTNEED != QEMU_MADV_INVALID
-    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) {
-        qemu_madvise((uint8_t *) t + offset, length, QEMU_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;
    }

@@ -76,7 +72,7 @@ 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;
@@ -109,8 +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++)
@@ -118,10 +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;
    }
@@ -154,10 +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;
 }

 /*
@@ -167,7 +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;
@@ -186,9 +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;
    }
@@ -208,7 +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;
@@ -314,7 +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;
@@ -326,16 +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;
        }
    }
@@ -346,7 +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)
@@ -389,18 +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;
@@ -419,21 +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;
@@ -441,14 +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;
    }
@@ -463,47 +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) {
@@ -536,11 +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) {
@@ -557,14 +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:
@@ -587,18 +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;

@@ -622,13 +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) {
@@ -696,7 +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;
@@ -741,15 +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) {
@@ -768,7 +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;
@@ -811,14 +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);
@@ -829,6 +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.
@@ -851,7 +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;
@@ -897,7 +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;

@@ -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;
@@ -1512,7 +1508,7 @@ 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;
@@ -1558,7 +1554,7 @@ fail:
 static int zero_single_l2(BlockDriverState *bs, uint64_t offset,
                          uint64_t nb_clusters)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    uint64_t *l2_table;
    int l2_index;
    int ret;
@@ -1595,7 +1591,7 @@ static int zero_single_l2(BlockDriverState *bs, uint64_t offset,

 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;

@@ -1638,10 +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;
@@ -1650,7 +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;
        }
@@ -1665,7 +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;
        }
@@ -1685,7 +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;
@@ -1708,7 +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;
@@ -1759,7 +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,
@@ -1792,7 +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;
                }
@@ -1801,7 +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);
        }
    }

@@ -1825,10 +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;
@@ -1843,7 +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;
    }
@@ -1861,14 +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;
        }
@@ -1879,7 +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,
@@ -85,7 +82,7 @@ static Qcow2SetRefcountFunc *const set_refcount_funcs[] = {

 int qcow2_refcount_init(BlockDriverState *bs)
 {
-    BDRVQcow2State *s = bs->opaque;
+    BDRVQcowState *s = bs->opaque;
    unsigned int refcount_table_size2, i;
    int ret;

@@ -119,7 +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);
 }

@@ -217,11 +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;
 }

 /*
@@ -231,7 +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;
@@ -274,7 +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;
@@ -290,7 +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);
@@ -308,7 +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;

@@ -487,12 +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);

@@ -558,16 +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;
    }
@@ -607,7 +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) {
@@ -615,7 +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);
@@ -625,7 +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) {
@@ -682,7 +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;
@@ -793,7 +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,
@@ -815,7 +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;

@@ -878,7 +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;
@@ -916,7 +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;
@@ -949,17 +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;
@@ -998,7 +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:
@@ -1042,7 +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;
@@ -1221,8 +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]);
@@ -1240,7 +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
@@ -1263,7 +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;
@@ -1305,7 +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.
 */
@@ -1315,7 +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;

@@ -1341,9 +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;
        }
@@ -1371,7 +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;
@@ -1491,7 +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;

@@ -1568,7 +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;
@@ -1662,8 +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));
@@ -1688,7 +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;

@@ -1718,11 +1707,11 @@ static int check_refblocks(BlockDriverState *bs, BdrvCheckResult *res,
                    goto resize_fail;
                }

-                ret = bdrv_truncate(bs->file->bs, offset + s->cluster_size);
+                ret = bdrv_truncate(bs->file, offset + s->cluster_size);
                if (ret < 0) {
                    goto resize_fail;
                }
-                size = bdrv_getlength(bs->file->bs);
+                size = bdrv_getlength(bs->file);
                if (size < 0) {
                    ret = size;
                    goto resize_fail;
@@ -1791,7 +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;
@@ -1855,7 +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;
@@ -1932,7 +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;
@@ -2002,7 +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;
@@ -2153,11 +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) {
@@ -2188,14 +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;
@@ -2325,7 +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;

@@ -2465,450 +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;
-
-    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;
@@ -293,7 +290,9 @@ typedef struct BDRVQcow2State {
     * override) */
    char *image_backing_file;
    char *image_backing_format;
-} BDRVQcow2State;
+} BDRVQcowState;
+
+struct QCowAIOCB;

 typedef struct Qcow2COWRegion {
    /**
@@ -302,8 +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;

 /**
@@ -318,6 +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;

@@ -397,28 +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);
 }
@@ -429,12 +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;
 }
@@ -453,7 +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);
 }
@@ -465,7 +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)
@@ -522,25 +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);
@@ -551,8 +552,7 @@ int qcow2_discard_clusters(BlockDriverState *bs, uint64_t offset,
 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);
@@ -577,12 +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"

 /**
@@ -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;
@@ -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;
@@ -347,7 +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 */
@@ -357,6 +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;
@@ -401,8 +404,11 @@ static int bdrv_qed_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)) {
@@ -410,7 +416,7 @@ static int bdrv_qed_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;
    }
@@ -465,7 +471,7 @@ static int bdrv_qed_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);
@@ -474,7 +480,7 @@ static int bdrv_qed_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);
@@ -492,8 +498,8 @@ static int bdrv_qed_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);
@@ -517,7 +523,7 @@ 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
@@ -535,7 +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) {
@@ -567,7 +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) {
@@ -575,17 +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_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);
+    ret = bdrv_truncate(bs, 0);
    if (ret < 0) {
        goto out;
    }
@@ -601,18 +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;
    }
@@ -620,7 +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;
 }

@@ -680,7 +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)
@@ -692,7 +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;
@@ -708,14 +712,13 @@ static void qed_is_allocated_cb(void *opaque, int ret, uint64_t offset, size_t l
    }

    if (cb->co) {
-        qemu_coroutine_enter(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;
@@ -724,7 +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 };

@@ -770,8 +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;
@@ -800,7 +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);
 }

@@ -1053,7 +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);
    }
 }
@@ -1079,7 +1081,7 @@ static void qed_aio_write_main(void *opaque, int ret)
    if (acb->find_cluster_ret == QED_CLUSTER_FOUND) {
        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;
@@ -1137,7 +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;
    }

@@ -1418,21 +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) {
-        qemu_coroutine_enter(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;
@@ -1440,22 +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;
@@ -1591,11 +1596,18 @@ static void bdrv_qed_invalidate_cache(BlockDriverState *bs, Error **errp)

    bdrv_qed_close(bs);

+    bdrv_invalidate_cache(bs->file, &local_err);
+    if (local_err) {
+        error_propagate(errp, local_err);
+        return;
+    }
+
    memset(s, 0, sizeof(BDRVQEDState));
    ret = bdrv_qed_open(bs, NULL, bs->open_flags, &local_err);
    if (local_err) {
-        error_propagate(errp, local_err);
-        error_prepend(errp, "Could not reopen qed layer: ");
+        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");
@@ -1652,6 +1664,7 @@ 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,
@@ -1660,7 +1673,7 @@ static BlockDriver bdrv_qed = {
    .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,
@@ -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:
 *
@@ -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.
                            */
@@ -219,16 +214,14 @@ static QuorumAIOCB *quorum_aio_get(BDRVQuorumState *s,
    return acb;
 }

-static void quorum_report_bad(QuorumOpType type, uint64_t sector_num,
-                              int nb_sectors, char *node_name, int ret)
+static void quorum_report_bad(QuorumAIOCB *acb, char *node_name, int ret)
 {
    const char *msg = NULL;
    if (ret < 0) {
        msg = strerror(-ret);
    }
-
-    qapi_event_send_quorum_report_bad(type, !!msg, msg, node_name,
-                                      sector_num, nb_sectors, &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)
@@ -290,19 +283,9 @@ static void quorum_aio_cb(void *opaque, int ret)
    BDRVQuorumState *s = acb->common.bs->opaque;
    bool rewrite = false;

-    if (ret == 0) {
-        acb->success_count++;
-    } else {
-        QuorumOpType type;
-        type = acb->is_read ? QUORUM_OP_TYPE_READ : QUORUM_OP_TYPE_WRITE;
-        quorum_report_bad(type, acb->sector_num, acb->nb_sectors,
-                          sacb->aiocb->bs->node_name, ret);
-    }
-
    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 + 1) < s->num_children) {
-            acb->child_iter++;
+        if (ret < 0 && ++acb->child_iter < s->num_children) {
            read_fifo_child(acb);
            return;
        }
@@ -317,6 +300,11 @@ static void quorum_aio_cb(void *opaque, int ret)

    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) {
@@ -348,9 +336,7 @@ static void quorum_report_bad_versions(BDRVQuorumState *s,
            continue;
        }
        QLIST_FOREACH(item, &version->items, next) {
-            quorum_report_bad(QUORUM_OP_TYPE_READ, acb->sector_num,
-                              acb->nb_sectors,
-                              s->children[item->index]->bs->node_name, 0);
+            quorum_report_bad(acb, s->bs[item->index]->node_name, 0);
        }
    }
 }
@@ -383,9 +369,8 @@ static bool quorum_rewrite_bad_versions(BDRVQuorumState *s, QuorumAIOCB *acb,
            continue;
        }
        QLIST_FOREACH(item, &version->items, next) {
-            bdrv_aio_writev(s->children[item->index], acb->sector_num,
-                            acb->qiov, acb->nb_sectors, quorum_rewrite_aio_cb,
-                            acb);
+            bdrv_aio_writev(s->bs[item->index], acb->sector_num, acb->qiov,
+                            acb->nb_sectors, quorum_rewrite_aio_cb, acb);
        }
    }

@@ -654,15 +639,14 @@ static BlockAIOCB *read_quorum_children(QuorumAIOCB *acb)
    int i;

    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++) {
-        acb->qcrs[i].aiocb = bdrv_aio_readv(s->children[i], acb->sector_num,
-                                            &acb->qcrs[i].qiov, acb->nb_sectors,
-                                            quorum_aio_cb, &acb->qcrs[i]);
+        bdrv_aio_readv(s->bs[i], acb->sector_num, &acb->qcrs[i].qiov,
+                       acb->nb_sectors, quorum_aio_cb, &acb->qcrs[i]);
    }

    return &acb->common;
@@ -672,15 +656,14 @@ static BlockAIOCB *read_fifo_child(QuorumAIOCB *acb)
 {
    BDRVQuorumState *s = acb->common.bs->opaque;

-    acb->qcrs[acb->child_iter].buf =
-        qemu_blockalign(s->children[acb->child_iter]->bs, acb->qiov->size);
+    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);
-    acb->qcrs[acb->child_iter].aiocb =
-        bdrv_aio_readv(s->children[acb->child_iter], acb->sector_num,
-                       &acb->qcrs[acb->child_iter].qiov, acb->nb_sectors,
-                       quorum_aio_cb, &acb->qcrs[acb->child_iter]);
+    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]);

    return &acb->common;
 }
@@ -719,8 +702,8 @@ static BlockAIOCB *quorum_aio_writev(BlockDriverState *bs,
    int i;

    for (i = 0; i < s->num_children; i++) {
-        acb->qcrs[i].aiocb = bdrv_aio_writev(s->children[i], sector_num,
-                                             qiov, nb_sectors, &quorum_aio_cb,
+        acb->qcrs[i].aiocb = bdrv_aio_writev(s->bs[i], sector_num, qiov,
+                                             nb_sectors, &quorum_aio_cb,
                                             &acb->qcrs[i]);
    }

@@ -734,12 +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;
        }
@@ -751,6 +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;
@@ -759,30 +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_nb_sectors(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;
@@ -795,7 +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;
@@ -859,7 +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;
        }
@@ -887,9 +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;
    }
@@ -902,12 +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");
@@ -916,6 +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) {
@@ -935,8 +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++) {
@@ -944,16 +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;
@@ -964,14 +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;
 }

@@ -981,79 +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);
-    s->children = g_renew(BdrvChild *, s->children, s->num_children + 1);
-    s->children[s->num_children++] = child;
-
-    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;
@@ -1061,17 +1003,16 @@ 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_obj(children,
-                         QOBJECT(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();
@@ -1103,9 +1044,10 @@ static BlockDriver bdrv_quorum = {

    .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_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,
@@ -15,9 +15,6 @@
 #ifndef QEMU_RAW_AIO_H
 #define QEMU_RAW_AIO_H

-#include "qemu/coroutine.h"
-#include "qemu/iov.h"
-
 /* AIO request types */
 #define QEMU_AIO_READ         0x0001
 #define QEMU_AIO_WRITE        0x0002
@@ -36,18 +33,15 @@

 /* linux-aio.c - Linux native implementation */
 #ifdef CONFIG_LINUX_AIO
-typedef struct LinuxAioState LinuxAioState;
-LinuxAioState *laio_init(void);
-void laio_cleanup(LinuxAioState *s);
-int coroutine_fn laio_co_submit(BlockDriverState *bs, LinuxAioState *s, int fd,
-                                uint64_t offset, QEMUIOVector *qiov, int type);
-BlockAIOCB *laio_submit(BlockDriverState *bs, LinuxAioState *s, int fd,
+void *laio_init(void);
+void laio_cleanup(void *s);
+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);
-void laio_detach_aio_context(LinuxAioState *s, AioContext *old_context);
-void laio_attach_aio_context(LinuxAioState *s, AioContext *new_context);
-void laio_io_plug(BlockDriverState *bs, LinuxAioState *s);
-void laio_io_unplug(BlockDriverState *bs, LinuxAioState *s);
+void laio_detach_aio_context(void *s, AioContext *old_context);
+void laio_attach_aio_context(void *s, AioContext *new_context);
+void laio_io_plug(BlockDriverState *bs, void *aio_ctx);
+void laio_io_unplug(BlockDriverState *bs, void *aio_ctx, bool unplug);
 #endif

 #ifdef _WIN32
@@ -21,13 +21,11 @@
 * 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/cutils.h"
+#include "qemu-common.h"
 #include "qemu/timer.h"
 #include "block/block_int.h"
 #include "qemu/module.h"
-#include "block/raw-aio.h"
+#include "raw-aio.h"
 #include "trace.h"
 #include "block/thread-pool.h"
 #include "qemu/iov.h"
@@ -121,9 +119,9 @@ static int aio_worker(void *arg)
    case QEMU_AIO_WRITE:
        count = handle_aiocb_rw(aiocb);
        if (count == aiocb->aio_nbytes) {
-            ret = 0;
+            count = 0;
        } else {
-            ret = -EINVAL;
+            count = -EINVAL;
        }
        break;
    case QEMU_AIO_FLUSH:
@@ -137,15 +135,15 @@ static int aio_worker(void *arg)
        break;
    }

-    g_free(aiocb);
+    g_slice_free(RawWin32AIOData, aiocb);
    return ret;
 }

 static BlockAIOCB *paio_submit(BlockDriverState *bs, HANDLE hfile,
-        int64_t offset, QEMUIOVector *qiov, int count,
+        int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
        BlockCompletionFunc *cb, void *opaque, int type)
 {
-    RawWin32AIOData *acb = g_new(RawWin32AIOData, 1);
+    RawWin32AIOData *acb = g_slice_new(RawWin32AIOData);
    ThreadPool *pool;

    acb->bs = bs;
@@ -155,12 +153,11 @@ static BlockAIOCB *paio_submit(BlockDriverState *bs, HANDLE hfile,
    if (qiov) {
        acb->aio_iov = qiov->iov;
        acb->aio_niov = qiov->niov;
-        assert(qiov->size == count);
    }
-    acb->aio_nbytes = count;
-    acb->aio_offset = offset;
+    acb->aio_nbytes = nb_sectors * 512;
+    acb->aio_offset = sector_num * 512;

-    trace_paio_submit(acb, opaque, offset, count, type);
+    trace_paio_submit(acb, opaque, sector_num, nb_sectors, type);
    pool = aio_get_thread_pool(bdrv_get_aio_context(bs));
    return thread_pool_submit_aio(pool, aio_worker, acb, cb, opaque);
 }
@@ -223,7 +220,7 @@ static void raw_attach_aio_context(BlockDriverState *bs,
    }
 }

-static void raw_probe_alignment(BlockDriverState *bs, Error **errp)
+static void raw_probe_alignment(BlockDriverState *bs)
 {
    BDRVRawState *s = bs->opaque;
    DWORD sectorsPerCluster, freeClusters, totalClusters, count;
@@ -231,14 +228,14 @@ static void raw_probe_alignment(BlockDriverState *bs, Error **errp)
    BOOL status;

    if (s->type == FTYPE_CD) {
-        bs->bl.request_alignment = 2048;
+        bs->request_alignment = 2048;
        return;
    }
    if (s->type == FTYPE_HARDDISK) {
        status = DeviceIoControl(s->hfile, IOCTL_DISK_GET_DRIVE_GEOMETRY_EX,
                                 NULL, 0, &dg, sizeof(dg), &count, NULL);
        if (status != 0) {
-            bs->bl.request_alignment = dg.Geometry.BytesPerSector;
+            bs->request_alignment = dg.Geometry.BytesPerSector;
            return;
        }
        /* try GetDiskFreeSpace too */
@@ -248,7 +245,7 @@ static void raw_probe_alignment(BlockDriverState *bs, Error **errp)
        GetDiskFreeSpace(s->drive_path, &sectorsPerCluster,
                         &dg.Geometry.BytesPerSector,
                         &freeClusters, &totalClusters);
-        bs->bl.request_alignment = dg.Geometry.BytesPerSector;
+        bs->request_alignment = dg.Geometry.BytesPerSector;
    }
 }

@@ -366,6 +363,7 @@ static int raw_open(BlockDriverState *bs, QDict *options, int flags,
        win32_aio_attach_aio_context(s->aio, bdrv_get_aio_context(bs));
    }

+    raw_probe_alignment(bs);
    ret = 0;
 fail:
    qemu_opts_del(opts);
@@ -379,10 +377,9 @@ static BlockAIOCB *raw_aio_readv(BlockDriverState *bs,
    BDRVRawState *s = bs->opaque;
    if (s->aio) {
        return win32_aio_submit(bs, s->aio, s->hfile, sector_num, qiov,
-                                nb_sectors, cb, opaque, QEMU_AIO_READ);
+                                nb_sectors, cb, opaque, QEMU_AIO_READ); 
    } else {
-        return paio_submit(bs, s->hfile, sector_num << BDRV_SECTOR_BITS, qiov,
-                           nb_sectors << BDRV_SECTOR_BITS,
+        return paio_submit(bs, s->hfile, sector_num, qiov, nb_sectors,
                           cb, opaque, QEMU_AIO_READ);
    }
 }
@@ -394,10 +391,9 @@ static BlockAIOCB *raw_aio_writev(BlockDriverState *bs,
    BDRVRawState *s = bs->opaque;
    if (s->aio) {
        return win32_aio_submit(bs, s->aio, s->hfile, sector_num, qiov,
-                                nb_sectors, cb, opaque, QEMU_AIO_WRITE);
+                                nb_sectors, cb, opaque, QEMU_AIO_WRITE); 
    } else {
-        return paio_submit(bs, s->hfile, sector_num << BDRV_SECTOR_BITS, qiov,
-                           nb_sectors << BDRV_SECTOR_BITS,
+        return paio_submit(bs, s->hfile, sector_num, qiov, nb_sectors,
                           cb, opaque, QEMU_AIO_WRITE);
    }
 }
@@ -552,7 +548,6 @@ BlockDriver bdrv_file = {
    .bdrv_needs_filename = true,
    .bdrv_parse_filename = raw_parse_filename,
    .bdrv_file_open     = raw_open,
-    .bdrv_refresh_limits = raw_probe_alignment,
    .bdrv_close         = raw_close,
    .bdrv_create        = raw_create,
    .bdrv_has_zero_init = bdrv_has_zero_init_1,
@@ -1,6 +1,6 @@
 /* BlockDriver implementation for "raw"
 *
- * Copyright (C) 2010-2016 Red Hat, Inc.
+ * Copyright (C) 2010, 2013, Red Hat, Inc.
 * Copyright (C) 2010, Blue Swirl <blauwirbel@gmail.com>
 * Copyright (C) 2009, Anthony Liguori <aliguori@us.ibm.com>
 *
@@ -26,9 +26,7 @@
 * IN THE SOFTWARE.
 */

-#include "qemu/osdep.h"
 #include "block/block_int.h"
-#include "qapi/error.h"
 #include "qemu/option.h"

 static QemuOptsList raw_create_opts = {
@@ -50,32 +48,34 @@ static int raw_reopen_prepare(BDRVReopenState *reopen_state,
    return 0;
 }

-static int coroutine_fn raw_co_preadv(BlockDriverState *bs, uint64_t offset,
-                                      uint64_t bytes, QEMUIOVector *qiov,
-                                      int flags)
+static int coroutine_fn raw_co_readv(BlockDriverState *bs, int64_t sector_num,
+                                     int nb_sectors, QEMUIOVector *qiov)
 {
    BLKDBG_EVENT(bs->file, BLKDBG_READ_AIO);
-    return bdrv_co_preadv(bs->file, offset, bytes, qiov, flags);
+    return bdrv_co_readv(bs->file, sector_num, nb_sectors, qiov);
 }

-static int coroutine_fn raw_co_pwritev(BlockDriverState *bs, uint64_t offset,
-                                       uint64_t bytes, QEMUIOVector *qiov,
-                                       int flags)
+static int coroutine_fn raw_co_writev(BlockDriverState *bs, int64_t sector_num,
+                                      int nb_sectors, QEMUIOVector *qiov)
 {
    void *buf = NULL;
    BlockDriver *drv;
    QEMUIOVector local_qiov;
    int ret;

-    if (bs->probed && offset < BLOCK_PROBE_BUF_SIZE && bytes) {
-        /* Handling partial writes would be a pain - so we just
-         * require that guests have 512-byte request alignment if
-         * probing occurred */
+    if (bs->probed && sector_num == 0) {
+        /* As long as these conditions are true, we can't get partial writes to
+         * the probe buffer and can just directly check the request. */
        QEMU_BUILD_BUG_ON(BLOCK_PROBE_BUF_SIZE != 512);
        QEMU_BUILD_BUG_ON(BDRV_SECTOR_SIZE != 512);
-        assert(offset == 0 && bytes >= BLOCK_PROBE_BUF_SIZE);

-        buf = qemu_try_blockalign(bs->file->bs, 512);
+        if (nb_sectors == 0) {
+            /* qemu_iovec_to_buf() would fail, but we want to return success
+             * instead of -EINVAL in this case. */
+            return 0;
+        }
+
+        buf = qemu_try_blockalign(bs->file, 512);
        if (!buf) {
            ret = -ENOMEM;
            goto fail;
@@ -102,7 +102,7 @@ static int coroutine_fn raw_co_pwritev(BlockDriverState *bs, uint64_t offset,
    }

    BLKDBG_EVENT(bs->file, BLKDBG_WRITE_AIO);
-    ret = bdrv_co_pwritev(bs->file, offset, bytes, qiov, flags);
+    ret = bdrv_co_writev(bs->file, sector_num, nb_sectors, qiov);

 fail:
    if (qiov == &local_qiov) {
@@ -114,66 +114,69 @@ fail:

 static int64_t coroutine_fn raw_co_get_block_status(BlockDriverState *bs,
                                            int64_t sector_num,
-                                            int nb_sectors, int *pnum,
-                                            BlockDriverState **file)
+                                            int nb_sectors, int *pnum)
 {
    *pnum = nb_sectors;
-    *file = bs->file->bs;
    return BDRV_BLOCK_RAW | BDRV_BLOCK_OFFSET_VALID | BDRV_BLOCK_DATA |
           (sector_num << BDRV_SECTOR_BITS);
 }

-static int coroutine_fn raw_co_pwrite_zeroes(BlockDriverState *bs,
-                                             int64_t offset, int count,
-                                             BdrvRequestFlags flags)
+static int coroutine_fn raw_co_write_zeroes(BlockDriverState *bs,
+                                            int64_t sector_num, int nb_sectors,
+                                            BdrvRequestFlags flags)
 {
-    return bdrv_co_pwrite_zeroes(bs->file, offset, count, flags);
+    return bdrv_co_write_zeroes(bs->file, sector_num, nb_sectors, flags);
 }

-static int coroutine_fn raw_co_pdiscard(BlockDriverState *bs,
-                                        int64_t offset, int count)
+static int coroutine_fn raw_co_discard(BlockDriverState *bs,
+                                       int64_t sector_num, int nb_sectors)
 {
-    return bdrv_co_pdiscard(bs->file->bs, offset, count);
+    return bdrv_co_discard(bs->file, sector_num, nb_sectors);
 }

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

 static int raw_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
 {
-    return bdrv_get_info(bs->file->bs, bdi);
+    return bdrv_get_info(bs->file, bdi);
 }

 static void raw_refresh_limits(BlockDriverState *bs, Error **errp)
 {
-    if (bs->probed) {
-        /* To make it easier to protect the first sector, any probed
-         * image is restricted to read-modify-write on sub-sector
-         * operations. */
-        bs->bl.request_alignment = BDRV_SECTOR_SIZE;
-    }
+    bs->bl = bs->file->bl;
 }

 static int raw_truncate(BlockDriverState *bs, int64_t offset)
 {
-    return bdrv_truncate(bs->file->bs, offset);
+    return bdrv_truncate(bs->file, offset);
+}
+
+static int raw_is_inserted(BlockDriverState *bs)
+{
+    return bdrv_is_inserted(bs->file);
 }

 static int raw_media_changed(BlockDriverState *bs)
 {
-    return bdrv_media_changed(bs->file->bs);
+    return bdrv_media_changed(bs->file);
 }

 static void raw_eject(BlockDriverState *bs, bool eject_flag)
 {
-    bdrv_eject(bs->file->bs, eject_flag);
+    bdrv_eject(bs->file, eject_flag);
 }

 static void raw_lock_medium(BlockDriverState *bs, bool locked)
 {
-    bdrv_lock_medium(bs->file->bs, locked);
+    bdrv_lock_medium(bs->file, locked);
+}
+
+static int raw_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
+{
+    return bdrv_ioctl(bs->file, req, buf);
 }

 static BlockAIOCB *raw_aio_ioctl(BlockDriverState *bs,
@@ -181,27 +184,30 @@ static BlockAIOCB *raw_aio_ioctl(BlockDriverState *bs,
                                 BlockCompletionFunc *cb,
                                 void *opaque)
 {
-    return bdrv_aio_ioctl(bs->file->bs, req, buf, cb, opaque);
+    return bdrv_aio_ioctl(bs->file, req, buf, cb, opaque);
 }

 static int raw_has_zero_init(BlockDriverState *bs)
 {
-    return bdrv_has_zero_init(bs->file->bs);
+    return bdrv_has_zero_init(bs->file);
 }

 static int raw_create(const char *filename, QemuOpts *opts, Error **errp)
 {
-    return bdrv_create_file(filename, opts, errp);
+    Error *local_err = NULL;
+    int ret;
+
+    ret = bdrv_create_file(filename, opts, &local_err);
+    if (local_err) {
+        error_propagate(errp, local_err);
+    }
+    return ret;
 }

 static int raw_open(BlockDriverState *bs, QDict *options, int flags,
                    Error **errp)
 {
-    bs->sg = bs->file->bs->sg;
-    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;
+    bs->sg = bs->file->sg;

    if (bs->probed && !bdrv_is_read_only(bs)) {
        fprintf(stderr,
@@ -211,7 +217,7 @@ static int raw_open(BlockDriverState *bs, QDict *options, int flags,
                "raw images, write operations on block 0 will be restricted.\n"
                "         Specify the 'raw' format explicitly to remove the "
                "restrictions.\n",
-                bs->file->bs->filename);
+                bs->file->filename);
    }

    return 0;
@@ -231,12 +237,12 @@ static int raw_probe(const uint8_t *buf, int buf_size, const char *filename)

 static int raw_probe_blocksizes(BlockDriverState *bs, BlockSizes *bsz)
 {
-    return bdrv_probe_blocksizes(bs->file->bs, bsz);
+    return bdrv_probe_blocksizes(bs->file, bsz);
 }

 static int raw_probe_geometry(BlockDriverState *bs, HDGeometry *geo)
 {
-    return bdrv_probe_geometry(bs->file->bs, geo);
+    return bdrv_probe_geometry(bs->file, geo);
 }

 BlockDriver bdrv_raw = {
@@ -246,10 +252,10 @@ BlockDriver bdrv_raw = {
    .bdrv_open            = &raw_open,
    .bdrv_close           = &raw_close,
    .bdrv_create          = &raw_create,
-    .bdrv_co_preadv       = &raw_co_preadv,
-    .bdrv_co_pwritev      = &raw_co_pwritev,
-    .bdrv_co_pwrite_zeroes = &raw_co_pwrite_zeroes,
-    .bdrv_co_pdiscard     = &raw_co_pdiscard,
+    .bdrv_co_readv        = &raw_co_readv,
+    .bdrv_co_writev       = &raw_co_writev,
+    .bdrv_co_write_zeroes = &raw_co_write_zeroes,
+    .bdrv_co_discard      = &raw_co_discard,
    .bdrv_co_get_block_status = &raw_co_get_block_status,
    .bdrv_truncate        = &raw_truncate,
    .bdrv_getlength       = &raw_getlength,
@@ -258,9 +264,11 @@ BlockDriver bdrv_raw = {
    .bdrv_refresh_limits  = &raw_refresh_limits,
    .bdrv_probe_blocksizes = &raw_probe_blocksizes,
    .bdrv_probe_geometry  = &raw_probe_geometry,
+    .bdrv_is_inserted     = &raw_is_inserted,
    .bdrv_media_changed   = &raw_media_changed,
    .bdrv_eject           = &raw_eject,
    .bdrv_lock_medium     = &raw_lock_medium,
+    .bdrv_ioctl           = &raw_ioctl,
    .bdrv_aio_ioctl       = &raw_aio_ioctl,
    .create_opts          = &raw_create_opts,
    .bdrv_has_zero_init   = &raw_has_zero_init
@@ -11,13 +11,11 @@
 * GNU GPL, version 2 or (at your option) any later version.
 */

-#include "qemu/osdep.h"
+#include <inttypes.h>

-#include "qapi/error.h"
+#include "qemu-common.h"
 #include "qemu/error-report.h"
 #include "block/block_int.h"
-#include "crypto/secret.h"
-#include "qemu/cutils.h"

 #include <rbd/librbd.h>

@@ -230,27 +228,6 @@ static char *qemu_rbd_parse_clientname(const char *conf, char *clientname)
    return NULL;
 }

-
-static int qemu_rbd_set_auth(rados_t cluster, const char *secretid,
-                             Error **errp)
-{
-    if (secretid == 0) {
-        return 0;
-    }
-
-    gchar *secret = qcrypto_secret_lookup_as_base64(secretid,
-                                                    errp);
-    if (!secret) {
-        return -1;
-    }
-
-    rados_conf_set(cluster, "key", secret);
-    g_free(secret);
-
-    return 0;
-}
-
-
 static int qemu_rbd_set_conf(rados_t cluster, const char *conf,
                             bool only_read_conf_file,
                             Error **errp)
@@ -290,8 +267,7 @@ static int qemu_rbd_set_conf(rados_t cluster, const char *conf,
            if (only_read_conf_file) {
                ret = rados_conf_read_file(cluster, value);
                if (ret < 0) {
-                    error_setg_errno(errp, -ret, "error reading conf file %s",
-                                     value);
+                    error_setg(errp, "error reading conf file %s", value);
                    break;
                }
            }
@@ -300,7 +276,7 @@ static int qemu_rbd_set_conf(rados_t cluster, const char *conf,
        } else if (!only_read_conf_file) {
            ret = rados_conf_set(cluster, name, value);
            if (ret < 0) {
-                error_setg_errno(errp, -ret, "invalid conf option %s", name);
+                error_setg(errp, "invalid conf option %s", name);
                ret = -EINVAL;
                break;
            }
@@ -323,13 +299,10 @@ static int qemu_rbd_create(const char *filename, QemuOpts *opts, Error **errp)
    char conf[RBD_MAX_CONF_SIZE];
    char clientname_buf[RBD_MAX_CONF_SIZE];
    char *clientname;
-    const char *secretid;
    rados_t cluster;
    rados_ioctx_t io_ctx;
    int ret;

-    secretid = qemu_opt_get(opts, "password-secret");
-
    if (qemu_rbd_parsename(filename, pool, sizeof(pool),
                           snap_buf, sizeof(snap_buf),
                           name, sizeof(name),
@@ -355,10 +328,9 @@ static int qemu_rbd_create(const char *filename, QemuOpts *opts, Error **errp)
    }

    clientname = qemu_rbd_parse_clientname(conf, clientname_buf);
-    ret = rados_create(&cluster, clientname);
-    if (ret < 0) {
-        error_setg_errno(errp, -ret, "error initializing");
-        return ret;
+    if (rados_create(&cluster, clientname) < 0) {
+        error_setg(errp, "error initializing");
+        return -EIO;
    }

    if (strstr(conf, "conf=") == NULL) {
@@ -378,32 +350,21 @@ static int qemu_rbd_create(const char *filename, QemuOpts *opts, Error **errp)
        return -EIO;
    }

-    if (qemu_rbd_set_auth(cluster, secretid, errp) < 0) {
+    if (rados_connect(cluster) < 0) {
+        error_setg(errp, "error connecting");
        rados_shutdown(cluster);
        return -EIO;
    }

-    ret = rados_connect(cluster);
-    if (ret < 0) {
-        error_setg_errno(errp, -ret, "error connecting");
+    if (rados_ioctx_create(cluster, pool, &io_ctx) < 0) {
+        error_setg(errp, "error opening pool %s", pool);
        rados_shutdown(cluster);
-        return ret;
-    }
-
-    ret = rados_ioctx_create(cluster, pool, &io_ctx);
-    if (ret < 0) {
-        error_setg_errno(errp, -ret, "error opening pool %s", pool);
-        rados_shutdown(cluster);
-        return ret;
+        return -EIO;
    }

    ret = rbd_create(io_ctx, name, bytes, &obj_order);
    rados_ioctx_destroy(io_ctx);
    rados_shutdown(cluster);
-    if (ret < 0) {
-        error_setg_errno(errp, -ret, "error rbd create");
-        return ret;
-    }

    return ret;
 }
@@ -462,11 +423,6 @@ static QemuOptsList runtime_opts = {
            .type = QEMU_OPT_STRING,
            .help = "Specification of the rbd image",
        },
-        {
-            .name = "password-secret",
-            .type = QEMU_OPT_STRING,
-            .help = "ID of secret providing the password",
-        },
        { /* end of list */ }
    },
 };
@@ -480,7 +436,6 @@ static int qemu_rbd_open(BlockDriverState *bs, QDict *options, int flags,
    char conf[RBD_MAX_CONF_SIZE];
    char clientname_buf[RBD_MAX_CONF_SIZE];
    char *clientname;
-    const char *secretid;
    QemuOpts *opts;
    Error *local_err = NULL;
    const char *filename;
@@ -495,7 +450,6 @@ static int qemu_rbd_open(BlockDriverState *bs, QDict *options, int flags,
    }

    filename = qemu_opt_get(opts, "filename");
-    secretid = qemu_opt_get(opts, "password-secret");

    if (qemu_rbd_parsename(filename, pool, sizeof(pool),
                           snap_buf, sizeof(snap_buf),
@@ -508,7 +462,7 @@ static int qemu_rbd_open(BlockDriverState *bs, QDict *options, int flags,
    clientname = qemu_rbd_parse_clientname(conf, clientname_buf);
    r = rados_create(&s->cluster, clientname);
    if (r < 0) {
-        error_setg_errno(errp, -r, "error initializing");
+        error_setg(errp, "error initializing");
        goto failed_opts;
    }

@@ -534,11 +488,6 @@ static int qemu_rbd_open(BlockDriverState *bs, QDict *options, int flags,
        }
    }

-    if (qemu_rbd_set_auth(s->cluster, secretid, errp) < 0) {
-        r = -EIO;
-        goto failed_shutdown;
-    }
-
    /*
     * Fallback to more conservative semantics if setting cache
     * options fails. Ignore errors from setting rbd_cache because the
@@ -554,19 +503,19 @@ static int qemu_rbd_open(BlockDriverState *bs, QDict *options, int flags,

    r = rados_connect(s->cluster);
    if (r < 0) {
-        error_setg_errno(errp, -r, "error connecting");
+        error_setg(errp, "error connecting");
        goto failed_shutdown;
    }

    r = rados_ioctx_create(s->cluster, pool, &s->io_ctx);
    if (r < 0) {
-        error_setg_errno(errp, -r, "error opening pool %s", pool);
+        error_setg(errp, "error opening pool %s", pool);
        goto failed_shutdown;
    }

    r = rbd_open(s->io_ctx, s->name, &s->image, s->snap);
    if (r < 0) {
-        error_setg_errno(errp, -r, "error reading header from %s", s->name);
+        error_setg(errp, "error reading header from %s", s->name);
        goto failed_open;
    }

@@ -649,9 +598,9 @@ static int rbd_aio_flush_wrapper(rbd_image_t image,
 }

 static BlockAIOCB *rbd_start_aio(BlockDriverState *bs,
-                                 int64_t off,
+                                 int64_t sector_num,
                                 QEMUIOVector *qiov,
-                                 int64_t size,
+                                 int nb_sectors,
                                 BlockCompletionFunc *cb,
                                 void *opaque,
                                 RBDAIOCmd cmd)
@@ -659,6 +608,7 @@ static BlockAIOCB *rbd_start_aio(BlockDriverState *bs,
    RBDAIOCB *acb;
    RADOSCB *rcb = NULL;
    rbd_completion_t c;
+    int64_t off, size;
    char *buf;
    int r;

@@ -667,7 +617,6 @@ static BlockAIOCB *rbd_start_aio(BlockDriverState *bs,
    acb = qemu_aio_get(&rbd_aiocb_info, bs, cb, opaque);
    acb->cmd = cmd;
    acb->qiov = qiov;
-    assert(!qiov || qiov->size == size);
    if (cmd == RBD_AIO_DISCARD || cmd == RBD_AIO_FLUSH) {
        acb->bounce = NULL;
    } else {
@@ -687,6 +636,9 @@ static BlockAIOCB *rbd_start_aio(BlockDriverState *bs,

    buf = acb->bounce;

+    off = sector_num * BDRV_SECTOR_SIZE;
+    size = nb_sectors * BDRV_SECTOR_SIZE;
+
    rcb = g_new(RADOSCB, 1);
    rcb->acb = acb;
    rcb->buf = buf;
@@ -736,8 +688,7 @@ static BlockAIOCB *qemu_rbd_aio_readv(BlockDriverState *bs,
                                      BlockCompletionFunc *cb,
                                      void *opaque)
 {
-    return rbd_start_aio(bs, sector_num << BDRV_SECTOR_BITS, qiov,
-                         (int64_t) nb_sectors << BDRV_SECTOR_BITS, cb, opaque,
+    return rbd_start_aio(bs, sector_num, qiov, nb_sectors, cb, opaque,
                         RBD_AIO_READ);
 }

@@ -748,8 +699,7 @@ static BlockAIOCB *qemu_rbd_aio_writev(BlockDriverState *bs,
                                       BlockCompletionFunc *cb,
                                       void *opaque)
 {
-    return rbd_start_aio(bs, sector_num << BDRV_SECTOR_BITS, qiov,
-                         (int64_t) nb_sectors << BDRV_SECTOR_BITS, cb, opaque,
+    return rbd_start_aio(bs, sector_num, qiov, nb_sectors, cb, opaque,
                         RBD_AIO_WRITE);
 }

@@ -882,8 +832,10 @@ static int qemu_rbd_snap_rollback(BlockDriverState *bs,
                                  const char *snapshot_name)
 {
    BDRVRBDState *s = bs->opaque;
+    int r;

-    return rbd_snap_rollback(s->image, snapshot_name);
+    r = rbd_snap_rollback(s->image, snapshot_name);
+    return r;
 }

 static int qemu_rbd_snap_list(BlockDriverState *bs,
@@ -930,13 +882,13 @@ static int qemu_rbd_snap_list(BlockDriverState *bs,
 }

 #ifdef LIBRBD_SUPPORTS_DISCARD
-static BlockAIOCB *qemu_rbd_aio_pdiscard(BlockDriverState *bs,
-                                         int64_t offset,
-                                         int count,
-                                         BlockCompletionFunc *cb,
-                                         void *opaque)
+static BlockAIOCB* qemu_rbd_aio_discard(BlockDriverState *bs,
+                                        int64_t sector_num,
+                                        int nb_sectors,
+                                        BlockCompletionFunc *cb,
+                                        void *opaque)
 {
-    return rbd_start_aio(bs, offset, NULL, count, cb, opaque,
+    return rbd_start_aio(bs, sector_num, NULL, nb_sectors, cb, opaque,
                         RBD_AIO_DISCARD);
 }
 #endif
@@ -967,11 +919,6 @@ static QemuOptsList qemu_rbd_create_opts = {
            .type = QEMU_OPT_SIZE,
            .help = "RBD object size"
        },
-        {
-            .name = "password-secret",
-            .type = QEMU_OPT_STRING,
-            .help = "ID of secret providing the password",
-        },
        { /* end of list */ }
    }
 };
@@ -1000,7 +947,7 @@ static BlockDriver bdrv_rbd = {
 #endif

 #ifdef LIBRBD_SUPPORTS_DISCARD
-    .bdrv_aio_pdiscard      = qemu_rbd_aio_pdiscard,
+    .bdrv_aio_discard       = qemu_rbd_aio_discard,
 #endif

    .bdrv_snapshot_create   = qemu_rbd_snap_create,
@@ -12,15 +12,12 @@
 * GNU GPL, version 2 or (at your option) any later version.
 */

-#include "qemu/osdep.h"
-#include "qapi/error.h"
+#include "qemu-common.h"
 #include "qemu/uri.h"
 #include "qemu/error-report.h"
 #include "qemu/sockets.h"
 #include "block/block_int.h"
-#include "sysemu/block-backend.h"
 #include "qemu/bitops.h"
-#include "qemu/cutils.h"

 #define SD_PROTO_VER 0x01

@@ -31,6 +28,7 @@
 #define SD_OP_READ_OBJ       0x02
 #define SD_OP_WRITE_OBJ      0x03
 /* 0x04 is used internally by Sheepdog */
+#define SD_OP_DISCARD_OBJ    0x05

 #define SD_OP_NEW_VDI        0x11
 #define SD_OP_LOCK_VDI       0x12
@@ -286,24 +284,15 @@ static inline bool is_snapshot(struct SheepdogInode *inode)
    return !!inode->snap_ctime;
 }

-static inline size_t count_data_objs(const struct SheepdogInode *inode)
-{
-    return DIV_ROUND_UP(inode->vdi_size,
-                        (1UL << inode->block_size_shift));
-}
-
 #undef DPRINTF
 #ifdef DEBUG_SDOG
-#define DEBUG_SDOG_PRINT 1
-#else
-#define DEBUG_SDOG_PRINT 0
-#endif
-#define DPRINTF(fmt, args...)                                           \
-    do {                                                                \
-        if (DEBUG_SDOG_PRINT) {                                         \
-            fprintf(stderr, "%s %d: " fmt, __func__, __LINE__, ##args); \
-        }                                                               \
+#define DPRINTF(fmt, args...)                                       \
+    do {                                                            \
+        fprintf(stdout, "%s %d: " fmt, __func__, __LINE__, ##args); \
    } while (0)
+#else
+#define DPRINTF(fmt, args...)
+#endif

 typedef struct SheepdogAIOCB SheepdogAIOCB;

@@ -329,7 +318,7 @@ enum AIOCBState {
    AIOCB_DISCARD_OBJ,
 };

-#define AIOCBOverlapping(x, y)                                 \
+#define AIOCBOverwrapping(x, y)                                 \
    (!(x->max_affect_data_idx < y->min_affect_data_idx          \
       || y->max_affect_data_idx < x->min_affect_data_idx))

@@ -353,15 +342,6 @@ struct SheepdogAIOCB {
    uint32_t min_affect_data_idx;
    uint32_t max_affect_data_idx;

-    /*
-     * The difference between affect_data_idx and dirty_data_idx:
-     * affect_data_idx represents range of index of all request types.
-     * dirty_data_idx represents range of index updated by COW requests.
-     * dirty_data_idx is used for updating an inode object.
-     */
-    uint32_t min_dirty_data_idx;
-    uint32_t max_dirty_data_idx;
-
    QLIST_ENTRY(SheepdogAIOCB) aiocb_siblings;
 };

@@ -371,6 +351,9 @@ typedef struct BDRVSheepdogState {

    SheepdogInode inode;

+    uint32_t min_dirty_data_idx;
+    uint32_t max_dirty_data_idx;
+
    char name[SD_MAX_VDI_LEN];
    bool is_snapshot;
    uint32_t cache_flags;
@@ -390,15 +373,10 @@ typedef struct BDRVSheepdogState {
    QLIST_HEAD(inflight_aio_head, AIOReq) inflight_aio_head;
    QLIST_HEAD(failed_aio_head, AIOReq) failed_aio_head;

-    CoQueue overlapping_queue;
+    CoQueue overwrapping_queue;
    QLIST_HEAD(inflight_aiocb_head, SheepdogAIOCB) inflight_aiocb_head;
 } BDRVSheepdogState;

-typedef struct BDRVSheepdogReopenState {
-    int fd;
-    int cache_flags;
-} BDRVSheepdogReopenState;
-
 static const char * sd_strerror(int err)
 {
    int i;
@@ -495,7 +473,7 @@ static inline void free_aio_req(BDRVSheepdogState *s, AIOReq *aio_req)

 static void coroutine_fn sd_finish_aiocb(SheepdogAIOCB *acb)
 {
-    qemu_coroutine_enter(acb->coroutine);
+    qemu_coroutine_enter(acb->coroutine, NULL);
    qemu_aio_unref(acb);
 }

@@ -578,9 +556,6 @@ static SheepdogAIOCB *sd_aio_setup(BlockDriverState *bs, QEMUIOVector *qiov,
    acb->max_affect_data_idx = (acb->sector_num * BDRV_SECTOR_SIZE +
                              acb->nb_sectors * BDRV_SECTOR_SIZE) / object_size;

-    acb->min_dirty_data_idx = UINT32_MAX;
-    acb->max_dirty_data_idx = 0;
-
    return acb;
 }

@@ -620,13 +595,14 @@ static coroutine_fn int send_co_req(int sockfd, SheepdogReq *hdr, void *data,
    ret = qemu_co_send(sockfd, hdr, sizeof(*hdr));
    if (ret != sizeof(*hdr)) {
        error_report("failed to send a req, %s", strerror(errno));
-        return -errno;
+        ret = -socket_error();
+        return ret;
    }

    ret = qemu_co_send(sockfd, data, *wlen);
    if (ret != *wlen) {
+        ret = -socket_error();
        error_report("failed to send a req, %s", strerror(errno));
-        return -errno;
    }

    return ret;
@@ -636,7 +612,7 @@ static void restart_co_req(void *opaque)
 {
    Coroutine *co = opaque;

-    qemu_coroutine_enter(co);
+    qemu_coroutine_enter(co, NULL);
 }

 typedef struct SheepdogReqCo {
@@ -662,16 +638,14 @@ static coroutine_fn void do_co_req(void *opaque)
    unsigned int *rlen = srco->rlen;

    co = qemu_coroutine_self();
-    aio_set_fd_handler(srco->aio_context, sockfd, false,
-                       NULL, restart_co_req, co);
+    aio_set_fd_handler(srco->aio_context, sockfd, NULL, restart_co_req, co);

    ret = send_co_req(sockfd, hdr, data, wlen);
    if (ret < 0) {
        goto out;
    }

-    aio_set_fd_handler(srco->aio_context, sockfd, false,
-                       restart_co_req, NULL, co);
+    aio_set_fd_handler(srco->aio_context, sockfd, restart_co_req, NULL, co);

    ret = qemu_co_recv(sockfd, hdr, sizeof(*hdr));
    if (ret != sizeof(*hdr)) {
@@ -696,8 +670,7 @@ static coroutine_fn void do_co_req(void *opaque)
 out:
    /* there is at most one request for this sockfd, so it is safe to
     * set each handler to NULL. */
-    aio_set_fd_handler(srco->aio_context, sockfd, false,
-                       NULL, NULL, NULL);
+    aio_set_fd_handler(srco->aio_context, sockfd, NULL, NULL, NULL);

    srco->ret = ret;
    srco->finished = true;
@@ -726,8 +699,8 @@ static int do_req(int sockfd, AioContext *aio_context, SheepdogReq *hdr,
    if (qemu_in_coroutine()) {
        do_co_req(&srco);
    } else {
-        co = qemu_coroutine_create(do_co_req, &srco);
-        qemu_coroutine_enter(co);
+        co = qemu_coroutine_create(do_co_req);
+        qemu_coroutine_enter(co, &srco);
        while (!srco.finished) {
            aio_poll(aio_context, true);
        }
@@ -749,8 +722,7 @@ static coroutine_fn void reconnect_to_sdog(void *opaque)
    BDRVSheepdogState *s = opaque;
    AIOReq *aio_req, *next;

-    aio_set_fd_handler(s->aio_context, s->fd, false, NULL,
-                       NULL, NULL);
+    aio_set_fd_handler(s->aio_context, s->fd, NULL, NULL, NULL);
    close(s->fd);
    s->fd = -1;

@@ -847,8 +819,8 @@ static void coroutine_fn aio_read_response(void *opaque)
             */
            if (rsp.result == SD_RES_SUCCESS) {
                s->inode.data_vdi_id[idx] = s->inode.vdi_id;
-                acb->max_dirty_data_idx = MAX(idx, acb->max_dirty_data_idx);
-                acb->min_dirty_data_idx = MIN(idx, acb->min_dirty_data_idx);
+                s->max_dirty_data_idx = MAX(idx, s->max_dirty_data_idx);
+                s->min_dirty_data_idx = MIN(idx, s->min_dirty_data_idx);
            }
        }
        break;
@@ -875,6 +847,10 @@ static void coroutine_fn aio_read_response(void *opaque)
            rsp.result = SD_RES_SUCCESS;
            s->discard_supported = false;
            break;
+        case SD_RES_SUCCESS:
+            idx = data_oid_to_idx(aio_req->oid);
+            s->inode.data_vdi_id[idx] = 0;
+            break;
        default:
            break;
        }
@@ -925,17 +901,17 @@ static void co_read_response(void *opaque)
    BDRVSheepdogState *s = opaque;

    if (!s->co_recv) {
-        s->co_recv = qemu_coroutine_create(aio_read_response, opaque);
+        s->co_recv = qemu_coroutine_create(aio_read_response);
    }

-    qemu_coroutine_enter(s->co_recv);
+    qemu_coroutine_enter(s->co_recv, opaque);
 }

 static void co_write_request(void *opaque)
 {
    BDRVSheepdogState *s = opaque;

-    qemu_coroutine_enter(s->co_send);
+    qemu_coroutine_enter(s->co_send, NULL);
 }

 /*
@@ -953,8 +929,7 @@ static int get_sheep_fd(BDRVSheepdogState *s, Error **errp)
        return fd;
    }

-    aio_set_fd_handler(s->aio_context, fd, false,
-                       co_read_response, NULL, s);
+    aio_set_fd_handler(s->aio_context, fd, co_read_response, NULL, s);
    return fd;
 }

@@ -1190,13 +1165,7 @@ static void coroutine_fn add_aio_request(BDRVSheepdogState *s, AIOReq *aio_req,
        hdr.flags = SD_FLAG_CMD_WRITE | flags;
        break;
    case AIOCB_DISCARD_OBJ:
-        hdr.opcode = SD_OP_WRITE_OBJ;
-        hdr.flags = SD_FLAG_CMD_WRITE | flags;
-        s->inode.data_vdi_id[data_oid_to_idx(oid)] = 0;
-        offset = offsetof(SheepdogInode,
-                          data_vdi_id[data_oid_to_idx(oid)]);
-        oid = vid_to_vdi_oid(s->inode.vdi_id);
-        wlen = datalen = sizeof(uint32_t);
+        hdr.opcode = SD_OP_DISCARD_OBJ;
        break;
    }

@@ -1215,7 +1184,7 @@ static void coroutine_fn add_aio_request(BDRVSheepdogState *s, AIOReq *aio_req,

    qemu_co_mutex_lock(&s->lock);
    s->co_send = qemu_coroutine_self();
-    aio_set_fd_handler(s->aio_context, s->fd, false,
+    aio_set_fd_handler(s->aio_context, s->fd,
                       co_read_response, co_write_request, s);
    socket_set_cork(s->fd, 1);

@@ -1234,8 +1203,7 @@ static void coroutine_fn add_aio_request(BDRVSheepdogState *s, AIOReq *aio_req,
    }
 out:
    socket_set_cork(s->fd, 0);
-    aio_set_fd_handler(s->aio_context, s->fd, false,
-                       co_read_response, NULL, s);
+    aio_set_fd_handler(s->aio_context, s->fd, co_read_response, NULL, s);
    s->co_send = NULL;
    qemu_co_mutex_unlock(&s->lock);
 }
@@ -1385,8 +1353,7 @@ static void sd_detach_aio_context(BlockDriverState *bs)
 {
    BDRVSheepdogState *s = bs->opaque;

-    aio_set_fd_handler(s->aio_context, s->fd, false, NULL,
-                       NULL, NULL);
+    aio_set_fd_handler(s->aio_context, s->fd, NULL, NULL, NULL);
 }

 static void sd_attach_aio_context(BlockDriverState *bs,
@@ -1395,8 +1362,7 @@ static void sd_attach_aio_context(BlockDriverState *bs,
    BDRVSheepdogState *s = bs->opaque;

    s->aio_context = new_context;
-    aio_set_fd_handler(new_context, s->fd, false,
-                       co_read_response, NULL, s);
+    aio_set_fd_handler(new_context, s->fd, co_read_response, NULL, s);
 }

 /* TODO Convert to fine grained options */
@@ -1500,17 +1466,18 @@ static int sd_open(BlockDriverState *bs, QDict *options, int flags,
    }

    memcpy(&s->inode, buf, sizeof(s->inode));
+    s->min_dirty_data_idx = UINT32_MAX;
+    s->max_dirty_data_idx = 0;

    bs->total_sectors = s->inode.vdi_size / BDRV_SECTOR_SIZE;
    pstrcpy(s->name, sizeof(s->name), vdi);
    qemu_co_mutex_init(&s->lock);
-    qemu_co_queue_init(&s->overlapping_queue);
+    qemu_co_queue_init(&s->overwrapping_queue);
    qemu_opts_del(opts);
    g_free(buf);
    return 0;
 out:
-    aio_set_fd_handler(bdrv_get_aio_context(bs), s->fd,
-                       false, NULL, NULL, NULL);
+    aio_set_fd_handler(bdrv_get_aio_context(bs), s->fd, NULL, NULL, NULL);
    if (s->fd >= 0) {
        closesocket(s->fd);
    }
@@ -1519,70 +1486,6 @@ out:
    return ret;
 }

-static int sd_reopen_prepare(BDRVReopenState *state, BlockReopenQueue *queue,
-                             Error **errp)
-{
-    BDRVSheepdogState *s = state->bs->opaque;
-    BDRVSheepdogReopenState *re_s;
-    int ret = 0;
-
-    re_s = state->opaque = g_new0(BDRVSheepdogReopenState, 1);
-
-    re_s->cache_flags = SD_FLAG_CMD_CACHE;
-    if (state->flags & BDRV_O_NOCACHE) {
-        re_s->cache_flags = SD_FLAG_CMD_DIRECT;
-    }
-
-    re_s->fd = get_sheep_fd(s, errp);
-    if (re_s->fd < 0) {
-        ret = re_s->fd;
-        return ret;
-    }
-
-    return ret;
-}
-
-static void sd_reopen_commit(BDRVReopenState *state)
-{
-    BDRVSheepdogReopenState *re_s = state->opaque;
-    BDRVSheepdogState *s = state->bs->opaque;
-
-    if (s->fd) {
-        aio_set_fd_handler(s->aio_context, s->fd, false,
-                           NULL, NULL, NULL);
-        closesocket(s->fd);
-    }
-
-    s->fd = re_s->fd;
-    s->cache_flags = re_s->cache_flags;
-
-    g_free(state->opaque);
-    state->opaque = NULL;
-
-    return;
-}
-
-static void sd_reopen_abort(BDRVReopenState *state)
-{
-    BDRVSheepdogReopenState *re_s = state->opaque;
-    BDRVSheepdogState *s = state->bs->opaque;
-
-    if (re_s == NULL) {
-        return;
-    }
-
-    if (re_s->fd) {
-        aio_set_fd_handler(s->aio_context, re_s->fd, false,
-                           NULL, NULL, NULL);
-        closesocket(re_s->fd);
-    }
-
-    g_free(state->opaque);
-    state->opaque = NULL;
-
-    return;
-}
-
 static int do_sd_create(BDRVSheepdogState *s, uint32_t *vdi_id, int snapshot,
                        Error **errp)
 {
@@ -1641,7 +1544,7 @@ static int do_sd_create(BDRVSheepdogState *s, uint32_t *vdi_id, int snapshot,

 static int sd_prealloc(const char *filename, Error **errp)
 {
-    BlockBackend *blk = NULL;
+    BlockDriverState *bs = NULL;
    BDRVSheepdogState *base = NULL;
    unsigned long buf_size;
    uint32_t idx, max_idx;
@@ -1650,22 +1553,19 @@ static int sd_prealloc(const char *filename, Error **errp)
    void *buf = NULL;
    int ret;

-    blk = blk_new_open(filename, NULL, NULL,
-                       BDRV_O_RDWR | BDRV_O_PROTOCOL, errp);
-    if (blk == NULL) {
-        ret = -EIO;
+    ret = bdrv_open(&bs, filename, NULL, NULL, BDRV_O_RDWR | BDRV_O_PROTOCOL,
+                    NULL, errp);
+    if (ret < 0) {
        goto out_with_err_set;
    }

-    blk_set_allow_write_beyond_eof(blk, true);
-
-    vdi_size = blk_getlength(blk);
+    vdi_size = bdrv_getlength(bs);
    if (vdi_size < 0) {
        ret = vdi_size;
        goto out;
    }

-    base = blk_bs(blk)->opaque;
+    base = bs->opaque;
    object_size = (UINT32_C(1) << base->inode.block_size_shift);
    buf_size = MIN(object_size, SD_DATA_OBJ_SIZE);
    buf = g_malloc0(buf_size);
@@ -1677,24 +1577,23 @@ static int sd_prealloc(const char *filename, Error **errp)
         * The created image can be a cloned image, so we need to read
         * a data from the source image.
         */
-        ret = blk_pread(blk, idx * buf_size, buf, buf_size);
+        ret = bdrv_pread(bs, idx * buf_size, buf, buf_size);
        if (ret < 0) {
            goto out;
        }
-        ret = blk_pwrite(blk, idx * buf_size, buf, buf_size, 0);
+        ret = bdrv_pwrite(bs, idx * buf_size, buf, buf_size);
        if (ret < 0) {
            goto out;
        }
    }

-    ret = 0;
 out:
    if (ret < 0) {
        error_setg_errno(errp, -ret, "Can't pre-allocate");
    }
 out_with_err_set:
-    if (blk) {
-        blk_unref(blk);
+    if (bs) {
+        bdrv_unref(bs);
    }
    g_free(buf);

@@ -1834,7 +1733,7 @@ static int sd_create(const char *filename, QemuOpts *opts,
    }

    if (backing_file) {
-        BlockBackend *blk;
+        BlockDriverState *bs;
        BDRVSheepdogState *base;
        BlockDriver *drv;

@@ -1846,23 +1745,23 @@ static int sd_create(const char *filename, QemuOpts *opts,
            goto out;
        }

-        blk = blk_new_open(backing_file, NULL, NULL,
-                           BDRV_O_PROTOCOL, errp);
-        if (blk == NULL) {
-            ret = -EIO;
+        bs = NULL;
+        ret = bdrv_open(&bs, backing_file, NULL, NULL, BDRV_O_PROTOCOL, NULL,
+                        errp);
+        if (ret < 0) {
            goto out;
        }

-        base = blk_bs(blk)->opaque;
+        base = bs->opaque;

        if (!is_snapshot(&base->inode)) {
            error_setg(errp, "cannot clone from a non snapshot vdi");
-            blk_unref(blk);
+            bdrv_unref(bs);
            ret = -EINVAL;
            goto out;
        }
        s->inode.vdi_id = base->inode.vdi_id;
-        blk_unref(blk);
+        bdrv_unref(bs);
    }

    s->aio_context = qemu_get_aio_context();
@@ -1877,7 +1776,8 @@ static int sd_create(const char *filename, QemuOpts *opts,

        fd = connect_to_sdog(s, &local_err);
        if (fd < 0) {
-            error_report_err(local_err);
+            error_report("%s", error_get_pretty(local_err));
+            error_free(local_err);
            ret = -EIO;
            goto out;
        }
@@ -1961,8 +1861,7 @@ static void sd_close(BlockDriverState *bs)
        error_report("%s, %s", sd_strerror(rsp->result), s->name);
    }

-    aio_set_fd_handler(bdrv_get_aio_context(bs), s->fd,
-                       false, NULL, NULL, NULL);
+    aio_set_fd_handler(bdrv_get_aio_context(bs), s->fd, NULL, NULL, NULL);
    closesocket(s->fd);
    g_free(s->host_spec);
 }
@@ -2024,16 +1923,16 @@ static void coroutine_fn sd_write_done(SheepdogAIOCB *acb)
    AIOReq *aio_req;
    uint32_t offset, data_len, mn, mx;

-    mn = acb->min_dirty_data_idx;
-    mx = acb->max_dirty_data_idx;
+    mn = s->min_dirty_data_idx;
+    mx = s->max_dirty_data_idx;
    if (mn <= mx) {
        /* we need to update the vdi object. */
        offset = sizeof(s->inode) - sizeof(s->inode.data_vdi_id) +
            mn * sizeof(s->inode.data_vdi_id[0]);
        data_len = (mx - mn + 1) * sizeof(s->inode.data_vdi_id[0]);

-        acb->min_dirty_data_idx = UINT32_MAX;
-        acb->max_dirty_data_idx = 0;
+        s->min_dirty_data_idx = UINT32_MAX;
+        s->max_dirty_data_idx = 0;

        iov.iov_base = &s->inode;
        iov.iov_len = sizeof(s->inode);
@@ -2242,9 +2141,7 @@ static int coroutine_fn sd_co_rw_vector(void *p)
        }

        aio_req = alloc_aio_req(s, acb, oid, len, offset, flags, create,
-                                old_oid,
-                                acb->aiocb_type == AIOCB_DISCARD_OBJ ?
-                                0 : done);
+                                old_oid, done);
        QLIST_INSERT_HEAD(&s->inflight_aio_head, aio_req, aio_siblings);

        add_aio_request(s, aio_req, acb->qiov->iov, acb->qiov->niov,
@@ -2261,12 +2158,12 @@ out:
    return 1;
 }

-static bool check_overlapping_aiocb(BDRVSheepdogState *s, SheepdogAIOCB *aiocb)
+static bool check_overwrapping_aiocb(BDRVSheepdogState *s, SheepdogAIOCB *aiocb)
 {
    SheepdogAIOCB *cb;

    QLIST_FOREACH(cb, &s->inflight_aiocb_head, aiocb_siblings) {
-        if (AIOCBOverlapping(aiocb, cb)) {
+        if (AIOCBOverwrapping(aiocb, cb)) {
            return true;
        }
    }
@@ -2295,15 +2192,15 @@ static coroutine_fn int sd_co_writev(BlockDriverState *bs, int64_t sector_num,
    acb->aiocb_type = AIOCB_WRITE_UDATA;

 retry:
-    if (check_overlapping_aiocb(s, acb)) {
-        qemu_co_queue_wait(&s->overlapping_queue);
+    if (check_overwrapping_aiocb(s, acb)) {
+        qemu_co_queue_wait(&s->overwrapping_queue);
        goto retry;
    }

    ret = sd_co_rw_vector(acb);
    if (ret <= 0) {
        QLIST_REMOVE(acb, aiocb_siblings);
-        qemu_co_queue_restart_all(&s->overlapping_queue);
+        qemu_co_queue_restart_all(&s->overwrapping_queue);
        qemu_aio_unref(acb);
        return ret;
    }
@@ -2311,7 +2208,7 @@ retry:
    qemu_coroutine_yield();

    QLIST_REMOVE(acb, aiocb_siblings);
-    qemu_co_queue_restart_all(&s->overlapping_queue);
+    qemu_co_queue_restart_all(&s->overwrapping_queue);

    return acb->ret;
 }
@@ -2328,15 +2225,15 @@ static coroutine_fn int sd_co_readv(BlockDriverState *bs, int64_t sector_num,
    acb->aio_done_func = sd_finish_aiocb;

 retry:
-    if (check_overlapping_aiocb(s, acb)) {
-        qemu_co_queue_wait(&s->overlapping_queue);
+    if (check_overwrapping_aiocb(s, acb)) {
+        qemu_co_queue_wait(&s->overwrapping_queue);
        goto retry;
    }

    ret = sd_co_rw_vector(acb);
    if (ret <= 0) {
        QLIST_REMOVE(acb, aiocb_siblings);
-        qemu_co_queue_restart_all(&s->overlapping_queue);
+        qemu_co_queue_restart_all(&s->overwrapping_queue);
        qemu_aio_unref(acb);
        return ret;
    }
@@ -2344,7 +2241,7 @@ retry:
    qemu_coroutine_yield();

    QLIST_REMOVE(acb, aiocb_siblings);
-    qemu_co_queue_restart_all(&s->overlapping_queue);
+    qemu_co_queue_restart_all(&s->overwrapping_queue);
    return acb->ret;
 }

@@ -2421,8 +2318,9 @@ static int sd_snapshot_create(BlockDriverState *bs, QEMUSnapshotInfo *sn_info)

    ret = do_sd_create(s, &new_vid, 1, &local_err);
    if (ret < 0) {
-        error_reportf_err(local_err,
-                          "failed to create inode for snapshot: ");
+        error_report("failed to create inode for snapshot: %s",
+                     error_get_pretty(local_err));
+        error_free(local_err);
        goto cleanup;
    }

@@ -2493,131 +2391,13 @@ out:
    return ret;
 }

-#define NR_BATCHED_DISCARD 128
-
-static bool remove_objects(BDRVSheepdogState *s)
-{
-    int fd, i = 0, nr_objs = 0;
-    Error *local_err = NULL;
-    int ret = 0;
-    bool result = true;
-    SheepdogInode *inode = &s->inode;
-
-    fd = connect_to_sdog(s, &local_err);
-    if (fd < 0) {
-        error_report_err(local_err);
-        return false;
-    }
-
-    nr_objs = count_data_objs(inode);
-    while (i < nr_objs) {
-        int start_idx, nr_filled_idx;
-
-        while (i < nr_objs && !inode->data_vdi_id[i]) {
-            i++;
-        }
-        start_idx = i;
-
-        nr_filled_idx = 0;
-        while (i < nr_objs && nr_filled_idx < NR_BATCHED_DISCARD) {
-            if (inode->data_vdi_id[i]) {
-                inode->data_vdi_id[i] = 0;
-                nr_filled_idx++;
-            }
-
-            i++;
-        }
-
-        ret = write_object(fd, s->aio_context,
-                           (char *)&inode->data_vdi_id[start_idx],
-                           vid_to_vdi_oid(s->inode.vdi_id), inode->nr_copies,
-                           (i - start_idx) * sizeof(uint32_t),
-                           offsetof(struct SheepdogInode,
-                                    data_vdi_id[start_idx]),
-                           false, s->cache_flags);
-        if (ret < 0) {
-            error_report("failed to discard snapshot inode.");
-            result = false;
-            goto out;
-        }
-    }
-
-out:
-    closesocket(fd);
-    return result;
-}
-
 static int sd_snapshot_delete(BlockDriverState *bs,
                              const char *snapshot_id,
                              const char *name,
                              Error **errp)
 {
-    unsigned long snap_id = 0;
-    char snap_tag[SD_MAX_VDI_TAG_LEN];
-    Error *local_err = NULL;
-    int fd, ret;
-    char buf[SD_MAX_VDI_LEN + SD_MAX_VDI_TAG_LEN];
-    BDRVSheepdogState *s = bs->opaque;
-    unsigned int wlen = SD_MAX_VDI_LEN + SD_MAX_VDI_TAG_LEN, rlen = 0;
-    uint32_t vid;
-    SheepdogVdiReq hdr = {
-        .opcode = SD_OP_DEL_VDI,
-        .data_length = wlen,
-        .flags = SD_FLAG_CMD_WRITE,
-    };
-    SheepdogVdiRsp *rsp = (SheepdogVdiRsp *)&hdr;
-
-    if (!remove_objects(s)) {
-        return -1;
-    }
-
-    memset(buf, 0, sizeof(buf));
-    memset(snap_tag, 0, sizeof(snap_tag));
-    pstrcpy(buf, SD_MAX_VDI_LEN, s->name);
-    ret = qemu_strtoul(snapshot_id, NULL, 10, &snap_id);
-    if (ret || snap_id > UINT32_MAX) {
-        error_setg(errp, "Invalid snapshot ID: %s",
-                         snapshot_id ? snapshot_id : "<null>");
-        return -EINVAL;
-    }
-
-    if (snap_id) {
-        hdr.snapid = (uint32_t) snap_id;
-    } else {
-        pstrcpy(snap_tag, sizeof(snap_tag), snapshot_id);
-        pstrcpy(buf + SD_MAX_VDI_LEN, SD_MAX_VDI_TAG_LEN, snap_tag);
-    }
-
-    ret = find_vdi_name(s, s->name, snap_id, snap_tag, &vid, true,
-                        &local_err);
-    if (ret) {
-        return ret;
-    }
-
-    fd = connect_to_sdog(s, &local_err);
-    if (fd < 0) {
-        error_report_err(local_err);
-        return -1;
-    }
-
-    ret = do_req(fd, s->aio_context, (SheepdogReq *)&hdr,
-                 buf, &wlen, &rlen);
-    closesocket(fd);
-    if (ret) {
-        return ret;
-    }
-
-    switch (rsp->result) {
-    case SD_RES_NO_VDI:
-        error_report("%s was already deleted", s->name);
-    case SD_RES_SUCCESS:
-        break;
-    default:
-        error_report("%s, %s", sd_strerror(rsp->result), s->name);
-        return -1;
-    }
-
-    return ret;
+    /* FIXME: Delete specified snapshot id.  */
+    return 0;
 }

 static int sd_snapshot_list(BlockDriverState *bs, QEMUSnapshotInfo **psn_tab)
@@ -2784,60 +2564,41 @@ static int sd_save_vmstate(BlockDriverState *bs, QEMUIOVector *qiov,
    return ret;
 }

-static int sd_load_vmstate(BlockDriverState *bs, QEMUIOVector *qiov,
-                           int64_t pos)
+static int sd_load_vmstate(BlockDriverState *bs, uint8_t *data,
+                           int64_t pos, int size)
 {
    BDRVSheepdogState *s = bs->opaque;
-    void *buf;
-    int ret;

-    buf = qemu_blockalign(bs, qiov->size);
-    ret = do_load_save_vmstate(s, buf, pos, qiov->size, 1);
-    qemu_iovec_from_buf(qiov, 0, buf, qiov->size);
-    qemu_vfree(buf);
-
-    return ret;
+    return do_load_save_vmstate(s, data, pos, size, 1);
 }


-static coroutine_fn int sd_co_pdiscard(BlockDriverState *bs, int64_t offset,
-                                      int count)
+static coroutine_fn int sd_co_discard(BlockDriverState *bs, int64_t sector_num,
+                                      int nb_sectors)
 {
    SheepdogAIOCB *acb;
+    QEMUIOVector dummy;
    BDRVSheepdogState *s = bs->opaque;
    int ret;
-    QEMUIOVector discard_iov;
-    struct iovec iov;
-    uint32_t zero = 0;

    if (!s->discard_supported) {
-        return 0;
+            return 0;
    }

-    memset(&discard_iov, 0, sizeof(discard_iov));
-    memset(&iov, 0, sizeof(iov));
-    iov.iov_base = &zero;
-    iov.iov_len = sizeof(zero);
-    discard_iov.iov = &iov;
-    discard_iov.niov = 1;
-    if (!QEMU_IS_ALIGNED(offset | count, BDRV_SECTOR_SIZE)) {
-        return -ENOTSUP;
-    }
-    acb = sd_aio_setup(bs, &discard_iov, offset >> BDRV_SECTOR_BITS,
-                       count >> BDRV_SECTOR_BITS);
+    acb = sd_aio_setup(bs, &dummy, sector_num, nb_sectors);
    acb->aiocb_type = AIOCB_DISCARD_OBJ;
    acb->aio_done_func = sd_finish_aiocb;

 retry:
-    if (check_overlapping_aiocb(s, acb)) {
-        qemu_co_queue_wait(&s->overlapping_queue);
+    if (check_overwrapping_aiocb(s, acb)) {
+        qemu_co_queue_wait(&s->overwrapping_queue);
        goto retry;
    }

    ret = sd_co_rw_vector(acb);
    if (ret <= 0) {
        QLIST_REMOVE(acb, aiocb_siblings);
-        qemu_co_queue_restart_all(&s->overlapping_queue);
+        qemu_co_queue_restart_all(&s->overwrapping_queue);
        qemu_aio_unref(acb);
        return ret;
    }
@@ -2845,14 +2606,14 @@ retry:
    qemu_coroutine_yield();

    QLIST_REMOVE(acb, aiocb_siblings);
-    qemu_co_queue_restart_all(&s->overlapping_queue);
+    qemu_co_queue_restart_all(&s->overwrapping_queue);

    return acb->ret;
 }

 static coroutine_fn int64_t
 sd_co_get_block_status(BlockDriverState *bs, int64_t sector_num, int nb_sectors,
-                       int *pnum, BlockDriverState **file)
+                       int *pnum)
 {
    BDRVSheepdogState *s = bs->opaque;
    SheepdogInode *inode = &s->inode;
@@ -2883,9 +2644,6 @@ sd_co_get_block_status(BlockDriverState *bs, int64_t sector_num, int nb_sectors,
    if (*pnum > nb_sectors) {
        *pnum = nb_sectors;
    }
-    if (ret > 0 && ret & BDRV_BLOCK_OFFSET_VALID) {
-        *file = bs;
-    }
    return ret;
 }

@@ -2945,9 +2703,6 @@ static BlockDriver bdrv_sheepdog = {
    .instance_size  = sizeof(BDRVSheepdogState),
    .bdrv_needs_filename = true,
    .bdrv_file_open = sd_open,
-    .bdrv_reopen_prepare    = sd_reopen_prepare,
-    .bdrv_reopen_commit     = sd_reopen_commit,
-    .bdrv_reopen_abort      = sd_reopen_abort,
    .bdrv_close     = sd_close,
    .bdrv_create    = sd_create,
    .bdrv_has_zero_init = bdrv_has_zero_init_1,
@@ -2958,7 +2713,7 @@ static BlockDriver bdrv_sheepdog = {
    .bdrv_co_readv  = sd_co_readv,
    .bdrv_co_writev = sd_co_writev,
    .bdrv_co_flush_to_disk  = sd_co_flush_to_disk,
-    .bdrv_co_pdiscard = sd_co_pdiscard,
+    .bdrv_co_discard = sd_co_discard,
    .bdrv_co_get_block_status = sd_co_get_block_status,

    .bdrv_snapshot_create   = sd_snapshot_create,
@@ -2981,9 +2736,6 @@ static BlockDriver bdrv_sheepdog_tcp = {
    .instance_size  = sizeof(BDRVSheepdogState),
    .bdrv_needs_filename = true,
    .bdrv_file_open = sd_open,
-    .bdrv_reopen_prepare    = sd_reopen_prepare,
-    .bdrv_reopen_commit     = sd_reopen_commit,
-    .bdrv_reopen_abort      = sd_reopen_abort,
    .bdrv_close     = sd_close,
    .bdrv_create    = sd_create,
    .bdrv_has_zero_init = bdrv_has_zero_init_1,
@@ -2994,7 +2746,7 @@ static BlockDriver bdrv_sheepdog_tcp = {
    .bdrv_co_readv  = sd_co_readv,
    .bdrv_co_writev = sd_co_writev,
    .bdrv_co_flush_to_disk  = sd_co_flush_to_disk,
-    .bdrv_co_pdiscard = sd_co_pdiscard,
+    .bdrv_co_discard = sd_co_discard,
    .bdrv_co_get_block_status = sd_co_get_block_status,

    .bdrv_snapshot_create   = sd_snapshot_create,
@@ -3017,9 +2769,6 @@ static BlockDriver bdrv_sheepdog_unix = {
    .instance_size  = sizeof(BDRVSheepdogState),
    .bdrv_needs_filename = true,
    .bdrv_file_open = sd_open,
-    .bdrv_reopen_prepare    = sd_reopen_prepare,
-    .bdrv_reopen_commit     = sd_reopen_commit,
-    .bdrv_reopen_abort      = sd_reopen_abort,
    .bdrv_close     = sd_close,
    .bdrv_create    = sd_create,
    .bdrv_has_zero_init = bdrv_has_zero_init_1,
@@ -3030,7 +2779,7 @@ static BlockDriver bdrv_sheepdog_unix = {
    .bdrv_co_readv  = sd_co_readv,
    .bdrv_co_writev = sd_co_writev,
    .bdrv_co_flush_to_disk  = sd_co_flush_to_disk,
-    .bdrv_co_pdiscard = sd_co_pdiscard,
+    .bdrv_co_discard = sd_co_discard,
    .bdrv_co_get_block_status = sd_co_get_block_status,

    .bdrv_snapshot_create   = sd_snapshot_create,
@@ -22,10 +22,8 @@
 * THE SOFTWARE.
 */

-#include "qemu/osdep.h"
 #include "block/snapshot.h"
 #include "block/block_int.h"
-#include "qapi/error.h"
 #include "qapi/qmp/qerror.h"

 QemuOptsList internal_snapshot_opts = {
@@ -151,7 +149,7 @@ int bdrv_can_snapshot(BlockDriverState *bs)

    if (!drv->bdrv_snapshot_create) {
        if (bs->file != NULL) {
-            return bdrv_can_snapshot(bs->file->bs);
+            return bdrv_can_snapshot(bs->file);
        }
        return 0;
    }
@@ -170,7 +168,7 @@ int bdrv_snapshot_create(BlockDriverState *bs,
        return drv->bdrv_snapshot_create(bs, sn_info);
    }
    if (bs->file) {
-        return bdrv_snapshot_create(bs->file->bs, sn_info);
+        return bdrv_snapshot_create(bs->file, sn_info);
    }
    return -ENOTSUP;
 }
@@ -190,10 +188,10 @@ int bdrv_snapshot_goto(BlockDriverState *bs,

    if (bs->file) {
        drv->bdrv_close(bs);
-        ret = bdrv_snapshot_goto(bs->file->bs, snapshot_id);
+        ret = bdrv_snapshot_goto(bs->file, snapshot_id);
        open_ret = drv->bdrv_open(bs, NULL, bs->open_flags, NULL);
        if (open_ret < 0) {
-            bdrv_unref(bs->file->bs);
+            bdrv_unref(bs->file);
            bs->drv = NULL;
            return open_ret;
        }
@@ -231,8 +229,6 @@ int bdrv_snapshot_delete(BlockDriverState *bs,
                         Error **errp)
 {
    BlockDriver *drv = bs->drv;
-    int ret;
-
    if (!drv) {
        error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, bdrv_get_device_name(bs));
        return -ENOMEDIUM;
@@ -243,26 +239,23 @@ int bdrv_snapshot_delete(BlockDriverState *bs,
    }

    /* drain all pending i/o before deleting snapshot */
-    bdrv_drained_begin(bs);
+    bdrv_drain(bs);

    if (drv->bdrv_snapshot_delete) {
-        ret = drv->bdrv_snapshot_delete(bs, snapshot_id, name, errp);
-    } else if (bs->file) {
-        ret = bdrv_snapshot_delete(bs->file->bs, snapshot_id, name, errp);
-    } else {
-        error_setg(errp, "Block format '%s' used by device '%s' "
-                   "does not support internal snapshot deletion",
-                   drv->format_name, bdrv_get_device_name(bs));
-        ret = -ENOTSUP;
+        return drv->bdrv_snapshot_delete(bs, snapshot_id, name, errp);
    }
-
-    bdrv_drained_end(bs);
-    return ret;
+    if (bs->file) {
+        return bdrv_snapshot_delete(bs->file, snapshot_id, name, errp);
+    }
+    error_setg(errp, "Block format '%s' used by device '%s' "
+               "does not support internal snapshot deletion",
+               drv->format_name, bdrv_get_device_name(bs));
+    return -ENOTSUP;
 }

-int bdrv_snapshot_delete_by_id_or_name(BlockDriverState *bs,
-                                       const char *id_or_name,
-                                       Error **errp)
+void bdrv_snapshot_delete_by_id_or_name(BlockDriverState *bs,
+                                        const char *id_or_name,
+                                        Error **errp)
 {
    int ret;
    Error *local_err = NULL;
@@ -277,7 +270,6 @@ int bdrv_snapshot_delete_by_id_or_name(BlockDriverState *bs,
    if (ret < 0) {
        error_propagate(errp, local_err);
    }
-    return ret;
 }

 int bdrv_snapshot_list(BlockDriverState *bs,
@@ -291,7 +283,7 @@ int bdrv_snapshot_list(BlockDriverState *bs,
        return drv->bdrv_snapshot_list(bs, psn_info);
    }
    if (bs->file) {
-        return bdrv_snapshot_list(bs->file->bs, psn_info);
+        return bdrv_snapshot_list(bs->file, psn_info);
    }
    return -ENOTSUP;
 }
@@ -358,164 +350,9 @@ int bdrv_snapshot_load_tmp_by_id_or_name(BlockDriverState *bs,
        ret = bdrv_snapshot_load_tmp(bs, NULL, id_or_name, &local_err);
    }

-    error_propagate(errp, local_err);
+    if (local_err) {
+        error_propagate(errp, local_err);
+    }

    return ret;
 }
-
-
-/* Group operations. All block drivers are involved.
- * These functions will properly handle dataplane (take aio_context_acquire
- * when appropriate for appropriate block drivers) */
-
-bool bdrv_all_can_snapshot(BlockDriverState **first_bad_bs)
-{
-    bool ok = true;
-    BlockDriverState *bs;
-    BdrvNextIterator it;
-
-    for (bs = bdrv_first(&it); bs; bs = bdrv_next(&it)) {
-        AioContext *ctx = bdrv_get_aio_context(bs);
-
-        aio_context_acquire(ctx);
-        if (bdrv_is_inserted(bs) && !bdrv_is_read_only(bs)) {
-            ok = bdrv_can_snapshot(bs);
-        }
-        aio_context_release(ctx);
-        if (!ok) {
-            goto fail;
-        }
-    }
-
-fail:
-    *first_bad_bs = bs;
-    return ok;
-}
-
-int bdrv_all_delete_snapshot(const char *name, BlockDriverState **first_bad_bs,
-                             Error **err)
-{
-    int ret = 0;
-    BlockDriverState *bs;
-    BdrvNextIterator it;
-    QEMUSnapshotInfo sn1, *snapshot = &sn1;
-
-    for (bs = bdrv_first(&it); bs; bs = bdrv_next(&it)) {
-        AioContext *ctx = bdrv_get_aio_context(bs);
-
-        aio_context_acquire(ctx);
-        if (bdrv_can_snapshot(bs) &&
-                bdrv_snapshot_find(bs, snapshot, name) >= 0) {
-            ret = bdrv_snapshot_delete_by_id_or_name(bs, name, err);
-        }
-        aio_context_release(ctx);
-        if (ret < 0) {
-            goto fail;
-        }
-    }
-
-fail:
-    *first_bad_bs = bs;
-    return ret;
-}
-
-
-int bdrv_all_goto_snapshot(const char *name, BlockDriverState **first_bad_bs)
-{
-    int err = 0;
-    BlockDriverState *bs;
-    BdrvNextIterator it;
-
-    for (bs = bdrv_first(&it); bs; bs = bdrv_next(&it)) {
-        AioContext *ctx = bdrv_get_aio_context(bs);
-
-        aio_context_acquire(ctx);
-        if (bdrv_can_snapshot(bs)) {
-            err = bdrv_snapshot_goto(bs, name);
-        }
-        aio_context_release(ctx);
-        if (err < 0) {
-            goto fail;
-        }
-    }
-
-fail:
-    *first_bad_bs = bs;
-    return err;
-}
-
-int bdrv_all_find_snapshot(const char *name, BlockDriverState **first_bad_bs)
-{
-    QEMUSnapshotInfo sn;
-    int err = 0;
-    BlockDriverState *bs;
-    BdrvNextIterator it;
-
-    for (bs = bdrv_first(&it); bs; bs = bdrv_next(&it)) {
-        AioContext *ctx = bdrv_get_aio_context(bs);
-
-        aio_context_acquire(ctx);
-        if (bdrv_can_snapshot(bs)) {
-            err = bdrv_snapshot_find(bs, &sn, name);
-        }
-        aio_context_release(ctx);
-        if (err < 0) {
-            goto fail;
-        }
-    }
-
-fail:
-    *first_bad_bs = bs;
-    return err;
-}
-
-int bdrv_all_create_snapshot(QEMUSnapshotInfo *sn,
-                             BlockDriverState *vm_state_bs,
-                             uint64_t vm_state_size,
-                             BlockDriverState **first_bad_bs)
-{
-    int err = 0;
-    BlockDriverState *bs;
-    BdrvNextIterator it;
-
-    for (bs = bdrv_first(&it); bs; bs = bdrv_next(&it)) {
-        AioContext *ctx = bdrv_get_aio_context(bs);
-
-        aio_context_acquire(ctx);
-        if (bs == vm_state_bs) {
-            sn->vm_state_size = vm_state_size;
-            err = bdrv_snapshot_create(bs, sn);
-        } else if (bdrv_can_snapshot(bs)) {
-            sn->vm_state_size = 0;
-            err = bdrv_snapshot_create(bs, sn);
-        }
-        aio_context_release(ctx);
-        if (err < 0) {
-            goto fail;
-        }
-    }
-
-fail:
-    *first_bad_bs = bs;
-    return err;
-}
-
-BlockDriverState *bdrv_all_find_vmstate_bs(void)
-{
-    BlockDriverState *bs;
-    BdrvNextIterator it;
-
-    for (bs = bdrv_first(&it); bs; bs = bdrv_next(&it)) {
-        AioContext *ctx = bdrv_get_aio_context(bs);
-        bool found;
-
-        aio_context_acquire(ctx);
-        found = bdrv_can_snapshot(bs);
-        aio_context_release(ctx);
-
-        if (found) {
-            break;
-        }
-    }
-    return bs;
-}
@@ -22,13 +22,14 @@
 * THE SOFTWARE.
 */

-#include "qemu/osdep.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>

 #include <libssh2.h>
 #include <libssh2_sftp.h>

 #include "block/block_int.h"
-#include "qapi/error.h"
 #include "qemu/error-report.h"
 #include "qemu/sockets.h"
 #include "qemu/uri.h"
@@ -192,7 +193,7 @@ sftp_error_report(BDRVSSHState *s, const char *fs, ...)
 static int parse_uri(const char *filename, QDict *options, Error **errp)
 {
    URI *uri = NULL;
-    QueryParams *qp;
+    QueryParams *qp = NULL;
    int i;

    uri = uri_parse(filename);
@@ -248,6 +249,9 @@ static int parse_uri(const char *filename, QDict *options, Error **errp)
    return 0;

 err:
+    if (qp) {
+      query_params_free(qp);
+    }
    if (uri) {
      uri_free(uri);
    }
@@ -508,73 +512,36 @@ static int authenticate(BDRVSSHState *s, const char *user, Error **errp)
    return ret;
 }

-static QemuOptsList ssh_runtime_opts = {
-    .name = "ssh",
-    .head = QTAILQ_HEAD_INITIALIZER(ssh_runtime_opts.head),
-    .desc = {
-        {
-            .name = "host",
-            .type = QEMU_OPT_STRING,
-            .help = "Host to connect to",
-        },
-        {
-            .name = "port",
-            .type = QEMU_OPT_NUMBER,
-            .help = "Port to connect to",
-        },
-        {
-            .name = "path",
-            .type = QEMU_OPT_STRING,
-            .help = "Path of the image on the host",
-        },
-        {
-            .name = "user",
-            .type = QEMU_OPT_STRING,
-            .help = "User as which to connect",
-        },
-        {
-            .name = "host_key_check",
-            .type = QEMU_OPT_STRING,
-            .help = "Defines how and what to check the host key against",
-        },
-    },
-};
-
 static int connect_to_ssh(BDRVSSHState *s, QDict *options,
                          int ssh_flags, int creat_mode, Error **errp)
 {
    int r, ret;
-    QemuOpts *opts = NULL;
-    Error *local_err = NULL;
    const char *host, *user, *path, *host_key_check;
    int port;

-    opts = qemu_opts_create(&ssh_runtime_opts, NULL, 0, &error_abort);
-    qemu_opts_absorb_qdict(opts, options, &local_err);
-    if (local_err) {
-        ret = -EINVAL;
-        error_propagate(errp, local_err);
-        goto err;
-    }
-
-    host = qemu_opt_get(opts, "host");
-    if (!host) {
+    if (!qdict_haskey(options, "host")) {
        ret = -EINVAL;
        error_setg(errp, "No hostname was specified");
        goto err;
    }
+    host = qdict_get_str(options, "host");

-    port = qemu_opt_get_number(opts, "port", 22);
+    if (qdict_haskey(options, "port")) {
+        port = qdict_get_int(options, "port");
+    } else {
+        port = 22;
+    }

-    path = qemu_opt_get(opts, "path");
-    if (!path) {
+    if (!qdict_haskey(options, "path")) {
        ret = -EINVAL;
        error_setg(errp, "No path was specified");
        goto err;
    }
+    path = qdict_get_str(options, "path");

-    user = qemu_opt_get(opts, "user");
-    if (!user) {
+    if (qdict_haskey(options, "user")) {
+        user = qdict_get_str(options, "user");
+    } else {
        user = g_get_user_name();
        if (!user) {
            error_setg_errno(errp, errno, "Can't get user name");
@@ -583,8 +550,9 @@ static int connect_to_ssh(BDRVSSHState *s, QDict *options,
        }
    }

-    host_key_check = qemu_opt_get(opts, "host_key_check");
-    if (!host_key_check) {
+    if (qdict_haskey(options, "host_key_check")) {
+        host_key_check = qdict_get_str(options, "host_key_check");
+    } else {
        host_key_check = "yes";
    }

@@ -648,14 +616,21 @@ static int connect_to_ssh(BDRVSSHState *s, QDict *options,
        goto err;
    }

-    qemu_opts_del(opts);
-
    r = libssh2_sftp_fstat(s->sftp_handle, &s->attrs);
    if (r < 0) {
        sftp_error_setg(errp, s, "failed to read file attributes");
        return -EINVAL;
    }

+    /* Delete the options we've used; any not deleted will cause the
+     * block layer to give an error about unused options.
+     */
+    qdict_del(options, "host");
+    qdict_del(options, "port");
+    qdict_del(options, "user");
+    qdict_del(options, "path");
+    qdict_del(options, "host_key_check");
+
    return 0;

 err:
@@ -675,8 +650,6 @@ static int connect_to_ssh(BDRVSSHState *s, QDict *options,
    }
    s->session = NULL;

-    qemu_opts_del(opts);
-
    return ret;
 }

@@ -808,7 +781,7 @@ static void restart_coroutine(void *opaque)

    DPRINTF("co=%p", co);

-    qemu_coroutine_enter(co);
+    qemu_coroutine_enter(co, NULL);
 }

 static coroutine_fn void set_fd_handler(BDRVSSHState *s, BlockDriverState *bs)
@@ -830,15 +803,14 @@ static coroutine_fn void set_fd_handler(BDRVSSHState *s, BlockDriverState *bs)
            rd_handler, wr_handler);

    aio_set_fd_handler(bdrv_get_aio_context(bs), s->sock,
-                       false, rd_handler, wr_handler, co);
+                       rd_handler, wr_handler, co);
 }

 static coroutine_fn void clear_fd_handler(BDRVSSHState *s,
                                          BlockDriverState *bs)
 {
    DPRINTF("s->sock=%d", s->sock);
-    aio_set_fd_handler(bdrv_get_aio_context(bs), s->sock,
-                       false, NULL, NULL, NULL);
+    aio_set_fd_handler(bdrv_get_aio_context(bs), s->sock, NULL, NULL, NULL);
 }

 /* A non-blocking call returned EAGAIN, so yield, ensuring the
@@ -11,14 +11,11 @@
 *
 */

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

 enum {
    /*
@@ -39,7 +36,7 @@ typedef struct StreamBlockJob {
    char *backing_file_str;
 } StreamBlockJob;

-static int coroutine_fn stream_populate(BlockBackend *blk,
+static int coroutine_fn stream_populate(BlockDriverState *bs,
                                        int64_t sector_num, int nb_sectors,
                                        void *buf)
 {
@@ -52,8 +49,35 @@ static int coroutine_fn stream_populate(BlockBackend *blk,
    qemu_iovec_init_external(&qiov, &iov, 1);

    /* Copy-on-read the unallocated clusters */
-    return blk_co_preadv(blk, sector_num * BDRV_SECTOR_SIZE, qiov.size, &qiov,
-                         BDRV_REQ_COPY_ON_READ);
+    return bdrv_co_copy_on_readv(bs, sector_num, nb_sectors, &qiov);
+}
+
+static void close_unused_images(BlockDriverState *top, BlockDriverState *base,
+                                const char *base_id)
+{
+    BlockDriverState *intermediate;
+    intermediate = top->backing_hd;
+
+    /* Must assign before bdrv_delete() to prevent traversing dangling pointer
+     * while we delete backing image instances.
+     */
+    bdrv_set_backing_hd(top, base);
+
+    while (intermediate) {
+        BlockDriverState *unused;
+
+        /* reached base */
+        if (intermediate == base) {
+            break;
+        }
+
+        unused = intermediate;
+        intermediate = intermediate->backing_hd;
+        bdrv_set_backing_hd(unused, NULL);
+        bdrv_unref(unused);
+    }
+
+    bdrv_refresh_limits(top, NULL);
 }

 typedef struct {
@@ -65,7 +89,6 @@ static void stream_complete(BlockJob *job, void *opaque)
 {
    StreamBlockJob *s = container_of(job, StreamBlockJob, common);
    StreamCompleteData *data = opaque;
-    BlockDriverState *bs = blk_bs(job->blk);
    BlockDriverState *base = s->base;

    if (!block_job_is_cancelled(&s->common) && data->reached_end &&
@@ -77,8 +100,8 @@ static void stream_complete(BlockJob *job, void *opaque)
                base_fmt = base->drv->format_name;
            }
        }
-        data->ret = bdrv_change_backing_file(bs, base_id, base_fmt);
-        bdrv_set_backing_hd(bs, base);
+        data->ret = bdrv_change_backing_file(job->bs, base_id, base_fmt);
+        close_unused_images(job->bs, base, base_id);
    }

    g_free(s->backing_file_str);
@@ -90,25 +113,23 @@ static void coroutine_fn stream_run(void *opaque)
 {
    StreamBlockJob *s = opaque;
    StreamCompleteData *data;
-    BlockBackend *blk = s->common.blk;
-    BlockDriverState *bs = blk_bs(blk);
+    BlockDriverState *bs = s->common.bs;
    BlockDriverState *base = s->base;
-    int64_t sector_num = 0;
-    int64_t end = -1;
-    uint64_t delay_ns = 0;
+    int64_t sector_num, end;
    int error = 0;
    int ret = 0;
    int n = 0;
    void *buf;

-    if (!bs->backing) {
-        goto out;
+    if (!bs->backing_hd) {
+        block_job_completed(&s->common, 0);
+        return;
    }

    s->common.len = bdrv_getlength(bs);
    if (s->common.len < 0) {
-        ret = s->common.len;
-        goto out;
+        block_job_completed(&s->common, s->common.len);
+        return;
    }

    end = s->common.len >> BDRV_SECTOR_BITS;
@@ -124,8 +145,10 @@ static void coroutine_fn stream_run(void *opaque)
    }

    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.
         */
@@ -143,7 +166,7 @@ static void coroutine_fn stream_run(void *opaque)
        } else if (ret >= 0) {
            /* Copy if allocated in the intermediate images.  Limit to the
             * known-unallocated area [sector_num, sector_num+n).  */
-            ret = bdrv_is_allocated_above(backing_bs(bs), base,
+            ret = bdrv_is_allocated_above(bs->backing_hd, base,
                                          sector_num, n, &n);

            /* Finish early if end of backing file has been reached */
@@ -155,11 +178,18 @@ static void coroutine_fn stream_run(void *opaque)
        }
        trace_stream_one_iteration(s, sector_num, n, ret);
        if (copy) {
-            ret = stream_populate(blk, sector_num, n, buf);
+            if (s->common.speed) {
+                delay_ns = ratelimit_calculate_delay(&s->limit, n);
+                if (delay_ns > 0) {
+                    goto wait;
+                }
+            }
+            ret = stream_populate(bs, sector_num, n, buf);
        }
        if (ret < 0) {
            BlockErrorAction action =
-                block_job_error_action(&s->common, s->on_error, true, -ret);
+                block_job_error_action(&s->common, s->common.bs, s->on_error,
+                                       true, -ret);
            if (action == BLOCK_ERROR_ACTION_STOP) {
                n = 0;
                continue;
@@ -175,9 +205,6 @@ static void coroutine_fn stream_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);
-        }
    }

    if (!base) {
@@ -189,7 +216,6 @@ static void coroutine_fn stream_run(void *opaque)

    qemu_vfree(buf);

-out:
    /* Modify backing chain and close BDSes in main loop */
    data = g_malloc(sizeof(*data));
    data->ret = ret;
@@ -214,15 +240,22 @@ static const BlockJobDriver stream_job_driver = {
    .set_speed     = stream_set_speed,
 };

-void stream_start(const char *job_id, BlockDriverState *bs,
-                  BlockDriverState *base, const char *backing_file_str,
-                  int64_t speed, BlockdevOnError on_error,
-                  BlockCompletionFunc *cb, void *opaque, Error **errp)
+void stream_start(BlockDriverState *bs, BlockDriverState *base,
+                  const char *backing_file_str, int64_t speed,
+                  BlockdevOnError on_error,
+                  BlockCompletionFunc *cb,
+                  void *opaque, Error **errp)
 {
    StreamBlockJob *s;

-    s = block_job_create(job_id, &stream_job_driver, bs, speed,
-                         cb, opaque, errp);
+    if ((on_error == BLOCKDEV_ON_ERROR_STOP ||
+         on_error == BLOCKDEV_ON_ERROR_ENOSPC) &&
+        !bdrv_iostatus_is_enabled(bs)) {
+        error_setg(errp, QERR_INVALID_PARAMETER, "on-error");
+        return;
+    }
+
+    s = block_job_create(&stream_job_driver, bs, speed, cb, opaque, errp);
    if (!s) {
        return;
    }
@@ -231,7 +264,7 @@ void stream_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(stream_run, s);
+    s->common.co = qemu_coroutine_create(stream_run);
    trace_stream_start(bs, base, s, s->common.co, opaque);
-    qemu_coroutine_enter(s->common.co);
+    qemu_coroutine_enter(s->common.co, s);
 }
@@ -22,44 +22,43 @@
 * along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

-#include "qemu/osdep.h"
-#include "sysemu/block-backend.h"
 #include "block/throttle-groups.h"
 #include "qemu/queue.h"
 #include "qemu/thread.h"
 #include "sysemu/qtest.h"

 /* The ThrottleGroup structure (with its ThrottleState) is shared
- * among different BlockBackends and it's independent from
+ * among different BlockDriverState and it's independent from
 * AioContext, so in order to use it from different threads it needs
 * its own locking.
 *
 * This locking is however handled internally in this file, so it's
- * transparent to outside users.
+ * mostly transparent to outside users (but see the documentation in
+ * throttle_groups_lock()).
 *
 * The whole ThrottleGroup structure is private and invisible to
 * outside users, that only use it through its ThrottleState.
 *
- * In addition to the ThrottleGroup structure, BlockBackendPublic has
+ * In addition to the ThrottleGroup structure, BlockDriverState has
 * fields that need to be accessed by other members of the group and
- * therefore also need to be protected by this lock. Once a
- * BlockBackend is registered in a group those fields can be accessed
- * by other threads any time.
+ * therefore also need to be protected by this lock. Once a BDS is
+ * registered in a group those fields can be accessed by other threads
+ * any time.
 *
 * Again, all this is handled internally and is mostly transparent to
 * the outside. The 'throttle_timers' field however has an additional
 * constraint because it may be temporarily invalid (see for example
 * bdrv_set_aio_context()). Therefore in this file a thread will
- * access some other BlockBackend's timers only after verifying that
- * that BlockBackend has throttled requests in the queue.
+ * access some other BDS's timers only after verifying that that BDS
+ * has throttled requests in the queue.
 */
 typedef struct ThrottleGroup {
    char *name; /* This is constant during the lifetime of the group */

    QemuMutex lock; /* This lock protects the following four fields */
    ThrottleState ts;
-    QLIST_HEAD(, BlockBackendPublic) head;
-    BlockBackend *tokens[2];
+    QLIST_HEAD(, BlockDriverState) head;
+    BlockDriverState *tokens[2];
    bool any_timer_armed[2];

    /* These two are protected by the global throttle_groups_lock */
@@ -77,9 +76,9 @@ static QTAILQ_HEAD(, ThrottleGroup) throttle_groups =
 * created.
 *
 * @name: the name of the ThrottleGroup
- * @ret:  the ThrottleState member of the ThrottleGroup
+ * @ret:  the ThrottleGroup
 */
-ThrottleState *throttle_group_incref(const char *name)
+static ThrottleGroup *throttle_group_incref(const char *name)
 {
    ThrottleGroup *tg = NULL;
    ThrottleGroup *iter;
@@ -109,7 +108,7 @@ ThrottleState *throttle_group_incref(const char *name)

    qemu_mutex_unlock(&throttle_groups_lock);

-    return &tg->ts;
+    return tg;
 }

 /* Decrease the reference count of a ThrottleGroup.
@@ -117,12 +116,10 @@ ThrottleState *throttle_group_incref(const char *name)
 * When the reference count reaches zero the ThrottleGroup is
 * destroyed.
 *
- * @ts:  The ThrottleGroup to unref, given by its ThrottleState member
+ * @tg:  The ThrottleGroup to unref
 */
-void throttle_group_unref(ThrottleState *ts)
+static void throttle_group_unref(ThrottleGroup *tg)
 {
-    ThrottleGroup *tg = container_of(ts, ThrottleGroup, ts);
-
    qemu_mutex_lock(&throttle_groups_lock);
    if (--tg->refcount == 0) {
        QTAILQ_REMOVE(&throttle_groups, tg, list);
@@ -133,117 +130,93 @@ void throttle_group_unref(ThrottleState *ts)
    qemu_mutex_unlock(&throttle_groups_lock);
 }

-/* Get the name from a BlockBackend's ThrottleGroup. The name (and the pointer)
- * is guaranteed to remain constant during the lifetime of the group.
+/* Get the name from a BlockDriverState's ThrottleGroup. The name (and
+ * the pointer) is guaranteed to remain constant during the lifetime
+ * of the group.
 *
- * @blk:  a BlockBackend that is member of a throttling group
+ * @bs:   a BlockDriverState that is member of a throttling group
 * @ret:  the name of the group.
 */
-const char *throttle_group_get_name(BlockBackend *blk)
+const char *throttle_group_get_name(BlockDriverState *bs)
 {
-    BlockBackendPublic *blkp = blk_get_public(blk);
-    ThrottleGroup *tg = container_of(blkp->throttle_state, ThrottleGroup, ts);
+    ThrottleGroup *tg = container_of(bs->throttle_state, ThrottleGroup, ts);
    return tg->name;
 }

-/* Return the next BlockBackend in the round-robin sequence, simulating a
- * circular list.
+/* Return the next BlockDriverState in the round-robin sequence,
+ * simulating a circular list.
 *
 * This assumes that tg->lock is held.
 *
- * @blk: the current BlockBackend
- * @ret: the next BlockBackend in the sequence
+ * @bs:  the current BlockDriverState
+ * @ret: the next BlockDriverState in the sequence
 */
-static BlockBackend *throttle_group_next_blk(BlockBackend *blk)
+static BlockDriverState *throttle_group_next_bs(BlockDriverState *bs)
 {
-    BlockBackendPublic *blkp = blk_get_public(blk);
-    ThrottleState *ts = blkp->throttle_state;
+    ThrottleState *ts = bs->throttle_state;
    ThrottleGroup *tg = container_of(ts, ThrottleGroup, ts);
-    BlockBackendPublic *next = QLIST_NEXT(blkp, round_robin);
+    BlockDriverState *next = QLIST_NEXT(bs, round_robin);

    if (!next) {
-        next = QLIST_FIRST(&tg->head);
+        return QLIST_FIRST(&tg->head);
    }

-    return blk_by_public(next);
+    return next;
 }

-/*
- * Return whether a BlockBackend has pending requests.
+/* Return the next BlockDriverState in the round-robin sequence with
+ * pending I/O requests.
 *
 * This assumes that tg->lock is held.
 *
- * @blk: the BlockBackend
+ * @bs:        the current BlockDriverState
 * @is_write:  the type of operation (read/write)
- * @ret:       whether the BlockBackend has pending requests.
+ * @ret:       the next BlockDriverState with pending requests, or bs
+ *             if there is none.
 */
-static inline bool blk_has_pending_reqs(BlockBackend *blk,
-                                        bool is_write)
+static BlockDriverState *next_throttle_token(BlockDriverState *bs,
+                                             bool is_write)
 {
-    const BlockBackendPublic *blkp = blk_get_public(blk);
-    return blkp->pending_reqs[is_write];
-}
-
-/* Return the next BlockBackend in the round-robin sequence with pending I/O
- * requests.
- *
- * This assumes that tg->lock is held.
- *
- * @blk:       the current BlockBackend
- * @is_write:  the type of operation (read/write)
- * @ret:       the next BlockBackend with pending requests, or blk if there is
- *             none.
- */
-static BlockBackend *next_throttle_token(BlockBackend *blk, bool is_write)
-{
-    BlockBackendPublic *blkp = blk_get_public(blk);
-    ThrottleGroup *tg = container_of(blkp->throttle_state, ThrottleGroup, ts);
-    BlockBackend *token, *start;
+    ThrottleGroup *tg = container_of(bs->throttle_state, ThrottleGroup, ts);
+    BlockDriverState *token, *start;

    start = token = tg->tokens[is_write];

    /* get next bs round in round robin style */
-    token = throttle_group_next_blk(token);
-    while (token != start && !blk_has_pending_reqs(token, is_write)) {
-        token = throttle_group_next_blk(token);
+    token = throttle_group_next_bs(token);
+    while (token != start && !token->pending_reqs[is_write]) {
+        token = throttle_group_next_bs(token);
    }

    /* If no IO are queued for scheduling on the next round robin token
     * then decide the token is the current bs because chances are
     * the current bs get the current request queued.
     */
-    if (token == start && !blk_has_pending_reqs(token, is_write)) {
-        token = blk;
+    if (token == start && !token->pending_reqs[is_write]) {
+        token = bs;
    }

-    /* Either we return the original BB, or one with pending requests */
-    assert(token == blk || blk_has_pending_reqs(token, is_write));
-
    return token;
 }

-/* Check if the next I/O request for a BlockBackend needs to be throttled or
- * not. If there's no timer set in this group, set one and update the token
- * accordingly.
+/* Check if the next I/O request for a BlockDriverState needs to be
+ * throttled or not. If there's no timer set in this group, set one
+ * and update the token accordingly.
 *
 * This assumes that tg->lock is held.
 *
- * @blk:        the current BlockBackend
+ * @bs:         the current BlockDriverState
 * @is_write:   the type of operation (read/write)
 * @ret:        whether the I/O request needs to be throttled or not
 */
-static bool throttle_group_schedule_timer(BlockBackend *blk, bool is_write)
+static bool throttle_group_schedule_timer(BlockDriverState *bs,
+                                          bool is_write)
 {
-    BlockBackendPublic *blkp = blk_get_public(blk);
-    ThrottleState *ts = blkp->throttle_state;
-    ThrottleTimers *tt = &blkp->throttle_timers;
+    ThrottleState *ts = bs->throttle_state;
+    ThrottleTimers *tt = &bs->throttle_timers;
    ThrottleGroup *tg = container_of(ts, ThrottleGroup, ts);
    bool must_wait;

-    if (blkp->io_limits_disabled) {
-        return false;
-    }
-
    /* Check if any of the timers in this group is already armed */
    if (tg->any_timer_armed[is_write]) {
        return true;
@@ -251,9 +224,9 @@ static bool throttle_group_schedule_timer(BlockBackend *blk, bool is_write)

    must_wait = throttle_schedule_timer(ts, tt, is_write);

-    /* If a timer just got armed, set blk as the current token */
+    /* If a timer just got armed, set bs as the current token */
    if (must_wait) {
-        tg->tokens[is_write] = blk;
+        tg->tokens[is_write] = bs;
        tg->any_timer_armed[is_write] = true;
    }

@@ -264,19 +237,18 @@ static bool throttle_group_schedule_timer(BlockBackend *blk, bool is_write)
 *
 * This assumes that tg->lock is held.
 *
- * @blk:       the current BlockBackend
+ * @bs:        the current BlockDriverState
 * @is_write:  the type of operation (read/write)
 */
-static void schedule_next_request(BlockBackend *blk, bool is_write)
+static void schedule_next_request(BlockDriverState *bs, bool is_write)
 {
-    BlockBackendPublic *blkp = blk_get_public(blk);
-    ThrottleGroup *tg = container_of(blkp->throttle_state, ThrottleGroup, ts);
+    ThrottleGroup *tg = container_of(bs->throttle_state, ThrottleGroup, ts);
    bool must_wait;
-    BlockBackend *token;
+    BlockDriverState *token;

    /* Check if there's any pending request to schedule next */
-    token = next_throttle_token(blk, is_write);
-    if (!blk_has_pending_reqs(token, is_write)) {
+    token = next_throttle_token(bs, is_write);
+    if (!token->pending_reqs[is_write]) {
        return;
    }

@@ -285,12 +257,12 @@ static void schedule_next_request(BlockBackend *blk, bool is_write)

    /* If it doesn't have to wait, queue it for immediate execution */
    if (!must_wait) {
-        /* Give preference to requests from the current blk */
+        /* Give preference to requests from the current bs */
        if (qemu_in_coroutine() &&
-            qemu_co_queue_next(&blkp->throttled_reqs[is_write])) {
-            token = blk;
+            qemu_co_queue_next(&bs->throttled_reqs[is_write])) {
+            token = bs;
        } else {
-            ThrottleTimers *tt = &blk_get_public(token)->throttle_timers;
+            ThrottleTimers *tt = &token->throttle_timers;
            int64_t now = qemu_clock_get_ns(tt->clock_type);
            timer_mod(tt->timers[is_write], now + 1);
            tg->any_timer_armed[is_write] = true;
@@ -303,67 +275,53 @@ static void schedule_next_request(BlockBackend *blk, bool is_write)
 * if necessary, and schedule the next request using a round robin
 * algorithm.
 *
- * @blk:       the current BlockBackend
+ * @bs:        the current BlockDriverState
 * @bytes:     the number of bytes for this I/O
 * @is_write:  the type of operation (read/write)
 */
-void coroutine_fn throttle_group_co_io_limits_intercept(BlockBackend *blk,
+void coroutine_fn throttle_group_co_io_limits_intercept(BlockDriverState *bs,
                                                        unsigned int bytes,
                                                        bool is_write)
 {
    bool must_wait;
-    BlockBackend *token;
+    BlockDriverState *token;

-    BlockBackendPublic *blkp = blk_get_public(blk);
-    ThrottleGroup *tg = container_of(blkp->throttle_state, ThrottleGroup, ts);
+    ThrottleGroup *tg = container_of(bs->throttle_state, ThrottleGroup, ts);
    qemu_mutex_lock(&tg->lock);

    /* First we check if this I/O has to be throttled. */
-    token = next_throttle_token(blk, is_write);
+    token = next_throttle_token(bs, is_write);
    must_wait = throttle_group_schedule_timer(token, is_write);

    /* Wait if there's a timer set or queued requests of this type */
-    if (must_wait || blkp->pending_reqs[is_write]) {
-        blkp->pending_reqs[is_write]++;
+    if (must_wait || bs->pending_reqs[is_write]) {
+        bs->pending_reqs[is_write]++;
        qemu_mutex_unlock(&tg->lock);
-        qemu_co_queue_wait(&blkp->throttled_reqs[is_write]);
+        qemu_co_queue_wait(&bs->throttled_reqs[is_write]);
        qemu_mutex_lock(&tg->lock);
-        blkp->pending_reqs[is_write]--;
+        bs->pending_reqs[is_write]--;
    }

    /* The I/O will be executed, so do the accounting */
-    throttle_account(blkp->throttle_state, is_write, bytes);
+    throttle_account(bs->throttle_state, is_write, bytes);

    /* Schedule the next request */
-    schedule_next_request(blk, is_write);
+    schedule_next_request(bs, is_write);

    qemu_mutex_unlock(&tg->lock);
 }

-void throttle_group_restart_blk(BlockBackend *blk)
-{
-    BlockBackendPublic *blkp = blk_get_public(blk);
-    int i;
-
-    for (i = 0; i < 2; i++) {
-        while (qemu_co_enter_next(&blkp->throttled_reqs[i])) {
-            ;
-        }
-    }
-}
-
 /* Update the throttle configuration for a particular group. Similar
 * to throttle_config(), but guarantees atomicity within the
 * throttling group.
 *
- * @blk: a BlockBackend that is a member of the group
+ * @bs:  a BlockDriverState that is member of the group
 * @cfg: the configuration to set
 */
-void throttle_group_config(BlockBackend *blk, ThrottleConfig *cfg)
+void throttle_group_config(BlockDriverState *bs, ThrottleConfig *cfg)
 {
-    BlockBackendPublic *blkp = blk_get_public(blk);
-    ThrottleTimers *tt = &blkp->throttle_timers;
-    ThrottleState *ts = blkp->throttle_state;
+    ThrottleTimers *tt = &bs->throttle_timers;
+    ThrottleState *ts = bs->throttle_state;
    ThrottleGroup *tg = container_of(ts, ThrottleGroup, ts);
    qemu_mutex_lock(&tg->lock);
    /* throttle_config() cancels the timers */
@@ -375,22 +333,18 @@ void throttle_group_config(BlockBackend *blk, ThrottleConfig *cfg)
    }
    throttle_config(ts, tt, cfg);
    qemu_mutex_unlock(&tg->lock);
-
-    qemu_co_enter_next(&blkp->throttled_reqs[0]);
-    qemu_co_enter_next(&blkp->throttled_reqs[1]);
 }

 /* Get the throttle configuration from a particular group. Similar to
 * throttle_get_config(), but guarantees atomicity within the
 * throttling group.
 *
- * @blk: a BlockBackend that is a member of the group
+ * @bs:  a BlockDriverState that is member of the group
 * @cfg: the configuration will be written here
 */
-void throttle_group_get_config(BlockBackend *blk, ThrottleConfig *cfg)
+void throttle_group_get_config(BlockDriverState *bs, ThrottleConfig *cfg)
 {
-    BlockBackendPublic *blkp = blk_get_public(blk);
-    ThrottleState *ts = blkp->throttle_state;
+    ThrottleState *ts = bs->throttle_state;
    ThrottleGroup *tg = container_of(ts, ThrottleGroup, ts);
    qemu_mutex_lock(&tg->lock);
    throttle_get_config(ts, cfg);
@@ -400,13 +354,12 @@ void throttle_group_get_config(BlockBackend *blk, ThrottleConfig *cfg)
 /* ThrottleTimers callback. This wakes up a request that was waiting
 * because it had been throttled.
 *
- * @blk:       the BlockBackend whose request had been throttled
+ * @bs:        the BlockDriverState whose request had been throttled
 * @is_write:  the type of operation (read/write)
 */
-static void timer_cb(BlockBackend *blk, bool is_write)
+static void timer_cb(BlockDriverState *bs, bool is_write)
 {
-    BlockBackendPublic *blkp = blk_get_public(blk);
-    ThrottleState *ts = blkp->throttle_state;
+    ThrottleState *ts = bs->throttle_state;
    ThrottleGroup *tg = container_of(ts, ThrottleGroup, ts);
    bool empty_queue;

@@ -416,13 +369,13 @@ static void timer_cb(BlockBackend *blk, bool is_write)
    qemu_mutex_unlock(&tg->lock);

    /* Run the request that was waiting for this timer */
-    empty_queue = !qemu_co_enter_next(&blkp->throttled_reqs[is_write]);
+    empty_queue = !qemu_co_enter_next(&bs->throttled_reqs[is_write]);

    /* If the request queue was empty then we have to take care of
     * scheduling the next one */
    if (empty_queue) {
        qemu_mutex_lock(&tg->lock);
-        schedule_next_request(blk, is_write);
+        schedule_next_request(bs, is_write);
        qemu_mutex_unlock(&tg->lock);
    }
 }
@@ -437,19 +390,18 @@ static void write_timer_cb(void *opaque)
    timer_cb(opaque, true);
 }

-/* Register a BlockBackend in the throttling group, also initializing its
- * timers and updating its throttle_state pointer to point to it. If a
- * throttling group with that name does not exist yet, it will be created.
+/* Register a BlockDriverState in the throttling group, also
+ * initializing its timers and updating its throttle_state pointer to
+ * point to it. If a throttling group with that name does not exist
+ * yet, it will be created.
 *
- * @blk:       the BlockBackend to insert
+ * @bs:        the BlockDriverState to insert
 * @groupname: the name of the group
 */
-void throttle_group_register_blk(BlockBackend *blk, const char *groupname)
+void throttle_group_register_bs(BlockDriverState *bs, const char *groupname)
 {
    int i;
-    BlockBackendPublic *blkp = blk_get_public(blk);
-    ThrottleState *ts = throttle_group_incref(groupname);
-    ThrottleGroup *tg = container_of(ts, ThrottleGroup, ts);
+    ThrottleGroup *tg = throttle_group_incref(groupname);
    int clock_type = QEMU_CLOCK_REALTIME;

    if (qtest_enabled()) {
@@ -457,67 +409,88 @@ void throttle_group_register_blk(BlockBackend *blk, const char *groupname)
        clock_type = QEMU_CLOCK_VIRTUAL;
    }

-    blkp->throttle_state = ts;
+    bs->throttle_state = &tg->ts;

    qemu_mutex_lock(&tg->lock);
-    /* If the ThrottleGroup is new set this BlockBackend as the token */
+    /* If the ThrottleGroup is new set this BlockDriverState as the token */
    for (i = 0; i < 2; i++) {
        if (!tg->tokens[i]) {
-            tg->tokens[i] = blk;
+            tg->tokens[i] = bs;
        }
    }

-    QLIST_INSERT_HEAD(&tg->head, blkp, round_robin);
+    QLIST_INSERT_HEAD(&tg->head, bs, round_robin);

-    throttle_timers_init(&blkp->throttle_timers,
-                         blk_get_aio_context(blk),
+    throttle_timers_init(&bs->throttle_timers,
+                         bdrv_get_aio_context(bs),
                         clock_type,
                         read_timer_cb,
                         write_timer_cb,
-                         blk);
+                         bs);

    qemu_mutex_unlock(&tg->lock);
 }

-/* Unregister a BlockBackend from its group, removing it from the list,
- * destroying the timers and setting the throttle_state pointer to NULL.
- *
- * The BlockBackend must not have pending throttled requests, so the caller has
- * to drain them first.
+/* Unregister a BlockDriverState from its group, removing it from the
+ * list, destroying the timers and setting the throttle_state pointer
+ * to NULL.
 *
 * The group will be destroyed if it's empty after this operation.
 *
- * @blk: the BlockBackend to remove
+ * @bs: the BlockDriverState to remove
 */
-void throttle_group_unregister_blk(BlockBackend *blk)
+void throttle_group_unregister_bs(BlockDriverState *bs)
 {
-    BlockBackendPublic *blkp = blk_get_public(blk);
-    ThrottleGroup *tg = container_of(blkp->throttle_state, ThrottleGroup, ts);
+    ThrottleGroup *tg = container_of(bs->throttle_state, ThrottleGroup, ts);
    int i;

-    assert(blkp->pending_reqs[0] == 0 && blkp->pending_reqs[1] == 0);
-    assert(qemu_co_queue_empty(&blkp->throttled_reqs[0]));
-    assert(qemu_co_queue_empty(&blkp->throttled_reqs[1]));
-
    qemu_mutex_lock(&tg->lock);
    for (i = 0; i < 2; i++) {
-        if (tg->tokens[i] == blk) {
-            BlockBackend *token = throttle_group_next_blk(blk);
-            /* Take care of the case where this is the last blk in the group */
-            if (token == blk) {
+        if (tg->tokens[i] == bs) {
+            BlockDriverState *token = throttle_group_next_bs(bs);
+            /* Take care of the case where this is the last bs in the group */
+            if (token == bs) {
                token = NULL;
            }
            tg->tokens[i] = token;
        }
    }

-    /* remove the current blk from the list */
-    QLIST_REMOVE(blkp, round_robin);
-    throttle_timers_destroy(&blkp->throttle_timers);
+    /* remove the current bs from the list */
+    QLIST_REMOVE(bs, round_robin);
+    throttle_timers_destroy(&bs->throttle_timers);
    qemu_mutex_unlock(&tg->lock);

-    throttle_group_unref(&tg->ts);
-    blkp->throttle_state = NULL;
+    throttle_group_unref(tg);
+    bs->throttle_state = NULL;
+}
+
+/* Acquire the lock of this throttling group.
+ *
+ * You won't normally need to use this. None of the functions from the
+ * ThrottleGroup API require you to acquire the lock since all of them
+ * deal with it internally.
+ *
+ * This should only be used in exceptional cases when you want to
+ * access the protected fields of a BlockDriverState directly
+ * (e.g. bdrv_swap()).
+ *
+ * @bs: a BlockDriverState that is member of the group
+ */
+void throttle_group_lock(BlockDriverState *bs)
+{
+    ThrottleGroup *tg = container_of(bs->throttle_state, ThrottleGroup, ts);
+    qemu_mutex_lock(&tg->lock);
+}
+
+/* Release the lock of this throttling group.
+ *
+ * See the comments in throttle_group_lock().
+ */
+void throttle_group_unlock(BlockDriverState *bs)
+{
+    ThrottleGroup *tg = container_of(bs->throttle_state, ThrottleGroup, ts);
+    qemu_mutex_unlock(&tg->lock);
 }

 static void throttle_groups_init(void)
@@ -1,116 +0,0 @@
-# See docs/tracing.txt for syntax documentation.
-
-# block.c
-bdrv_open_common(void *bs, const char *filename, int flags, const char *format_name) "bs %p filename \"%s\" flags %#x format_name \"%s\""
-bdrv_lock_medium(void *bs, bool locked) "bs %p locked %d"
-
-# block/block-backend.c
-blk_co_preadv(void *blk, void *bs, int64_t offset, unsigned int bytes, int flags) "blk %p bs %p offset %"PRId64" bytes %u flags %x"
-blk_co_pwritev(void *blk, void *bs, int64_t offset, unsigned int bytes, int flags) "blk %p bs %p offset %"PRId64" bytes %u flags %x"
-
-# block/io.c
-bdrv_aio_pdiscard(void *bs, int64_t offset, int count, void *opaque) "bs %p offset %"PRId64" count %d opaque %p"
-bdrv_aio_flush(void *bs, void *opaque) "bs %p opaque %p"
-bdrv_aio_readv(void *bs, int64_t sector_num, int nb_sectors, void *opaque) "bs %p sector_num %"PRId64" nb_sectors %d opaque %p"
-bdrv_aio_writev(void *bs, int64_t sector_num, int nb_sectors, void *opaque) "bs %p sector_num %"PRId64" nb_sectors %d opaque %p"
-bdrv_co_readv(void *bs, int64_t sector_num, int nb_sector) "bs %p sector_num %"PRId64" nb_sectors %d"
-bdrv_co_writev(void *bs, int64_t sector_num, int nb_sector) "bs %p sector_num %"PRId64" nb_sectors %d"
-bdrv_co_pwrite_zeroes(void *bs, int64_t offset, int count, int flags) "bs %p offset %"PRId64" count %d flags %#x"
-bdrv_co_do_copy_on_readv(void *bs, int64_t offset, unsigned int bytes, int64_t cluster_offset, unsigned int cluster_bytes) "bs %p offset %"PRId64" bytes %u cluster_offset %"PRId64" cluster_bytes %u"
-
-# block/stream.c
-stream_one_iteration(void *s, int64_t sector_num, int nb_sectors, int is_allocated) "s %p sector_num %"PRId64" nb_sectors %d is_allocated %d"
-stream_start(void *bs, void *base, void *s, void *co, void *opaque) "bs %p base %p s %p co %p opaque %p"
-
-# block/commit.c
-commit_one_iteration(void *s, int64_t sector_num, int nb_sectors, int is_allocated) "s %p sector_num %"PRId64" nb_sectors %d is_allocated %d"
-commit_start(void *bs, void *base, void *top, void *s, void *co, void *opaque) "bs %p base %p top %p s %p co %p opaque %p"
-
-# block/mirror.c
-mirror_start(void *bs, void *s, void *co, void *opaque) "bs %p s %p co %p opaque %p"
-mirror_restart_iter(void *s, int64_t cnt) "s %p dirty count %"PRId64
-mirror_before_flush(void *s) "s %p"
-mirror_before_drain(void *s, int64_t cnt) "s %p dirty count %"PRId64
-mirror_before_sleep(void *s, int64_t cnt, int synced, uint64_t delay_ns) "s %p dirty count %"PRId64" synced %d delay %"PRIu64"ns"
-mirror_one_iteration(void *s, int64_t sector_num, int nb_sectors) "s %p sector_num %"PRId64" nb_sectors %d"
-mirror_iteration_done(void *s, int64_t sector_num, int nb_sectors, int ret) "s %p sector_num %"PRId64" nb_sectors %d ret %d"
-mirror_yield(void *s, int64_t cnt, int buf_free_count, int in_flight) "s %p dirty count %"PRId64" free buffers %d in_flight %d"
-mirror_yield_in_flight(void *s, int64_t sector_num, int in_flight) "s %p sector_num %"PRId64" in_flight %d"
-mirror_yield_buf_busy(void *s, int nb_chunks, int in_flight) "s %p requested chunks %d in_flight %d"
-mirror_break_buf_busy(void *s, int nb_chunks, int in_flight) "s %p requested chunks %d in_flight %d"
-
-# block/backup.c
-backup_do_cow_enter(void *job, int64_t start, int64_t sector_num, int nb_sectors) "job %p start %"PRId64" sector_num %"PRId64" nb_sectors %d"
-backup_do_cow_return(void *job, int64_t sector_num, int nb_sectors, int ret) "job %p sector_num %"PRId64" nb_sectors %d ret %d"
-backup_do_cow_skip(void *job, int64_t start) "job %p start %"PRId64
-backup_do_cow_process(void *job, int64_t start) "job %p start %"PRId64
-backup_do_cow_read_fail(void *job, int64_t start, int ret) "job %p start %"PRId64" ret %d"
-backup_do_cow_write_fail(void *job, int64_t start, int ret) "job %p start %"PRId64" ret %d"
-
-# blockdev.c
-qmp_block_job_cancel(void *job) "job %p"
-qmp_block_job_pause(void *job) "job %p"
-qmp_block_job_resume(void *job) "job %p"
-qmp_block_job_complete(void *job) "job %p"
-block_job_cb(void *bs, void *job, int ret) "bs %p job %p ret %d"
-qmp_block_stream(void *bs, void *job) "bs %p job %p"
-
-# block/raw-win32.c
-# block/raw-posix.c
-paio_submit_co(int64_t offset, int count, int type) "offset %"PRId64" count %d type %d"
-paio_submit(void *acb, void *opaque, int64_t offset, int count, int type) "acb %p opaque %p offset %"PRId64" count %d type %d"
-
-# block/qcow2.c
-qcow2_writev_start_req(void *co, int64_t offset, int bytes) "co %p offset %" PRIx64 " bytes %d"
-qcow2_writev_done_req(void *co, int ret) "co %p ret %d"
-qcow2_writev_start_part(void *co) "co %p"
-qcow2_writev_done_part(void *co, int cur_bytes) "co %p cur_bytes %d"
-qcow2_writev_data(void *co, uint64_t offset) "co %p offset %" PRIx64
-qcow2_pwrite_zeroes_start_req(void *co, int64_t offset, int count) "co %p offset %" PRIx64 " count %d"
-qcow2_pwrite_zeroes(void *co, int64_t offset, int count) "co %p offset %" PRIx64 " count %d"
-
-# block/qcow2-cluster.c
-qcow2_alloc_clusters_offset(void *co, uint64_t offset, int bytes) "co %p offset %" PRIx64 " bytes %d"
-qcow2_handle_copied(void *co, uint64_t guest_offset, uint64_t host_offset, uint64_t bytes) "co %p guest_offset %" PRIx64 " host_offset %" PRIx64 " bytes %" PRIx64
-qcow2_handle_alloc(void *co, uint64_t guest_offset, uint64_t host_offset, uint64_t bytes) "co %p guest_offset %" PRIx64 " host_offset %" PRIx64 " bytes %" PRIx64
-qcow2_do_alloc_clusters_offset(void *co, uint64_t guest_offset, uint64_t host_offset, int nb_clusters) "co %p guest_offset %" PRIx64 " host_offset %" PRIx64 " nb_clusters %d"
-qcow2_cluster_alloc_phys(void *co) "co %p"
-qcow2_cluster_link_l2(void *co, int nb_clusters) "co %p nb_clusters %d"
-
-qcow2_l2_allocate(void *bs, int l1_index) "bs %p l1_index %d"
-qcow2_l2_allocate_get_empty(void *bs, int l1_index) "bs %p l1_index %d"
-qcow2_l2_allocate_write_l2(void *bs, int l1_index) "bs %p l1_index %d"
-qcow2_l2_allocate_write_l1(void *bs, int l1_index) "bs %p l1_index %d"
-qcow2_l2_allocate_done(void *bs, int l1_index, int ret) "bs %p l1_index %d ret %d"
-
-# block/qcow2-cache.c
-qcow2_cache_get(void *co, int c, uint64_t offset, bool read_from_disk) "co %p is_l2_cache %d offset %" PRIx64 " read_from_disk %d"
-qcow2_cache_get_replace_entry(void *co, int c, int i) "co %p is_l2_cache %d index %d"
-qcow2_cache_get_read(void *co, int c, int i) "co %p is_l2_cache %d index %d"
-qcow2_cache_get_done(void *co, int c, int i) "co %p is_l2_cache %d index %d"
-qcow2_cache_flush(void *co, int c) "co %p is_l2_cache %d"
-qcow2_cache_entry_flush(void *co, int c, int i) "co %p is_l2_cache %d index %d"
-
-# block/qed-l2-cache.c
-qed_alloc_l2_cache_entry(void *l2_cache, void *entry) "l2_cache %p entry %p"
-qed_unref_l2_cache_entry(void *entry, int ref) "entry %p ref %d"
-qed_find_l2_cache_entry(void *l2_cache, void *entry, uint64_t offset, int ref) "l2_cache %p entry %p offset %"PRIu64" ref %d"
-
-# block/qed-table.c
-qed_read_table(void *s, uint64_t offset, void *table) "s %p offset %"PRIu64" table %p"
-qed_read_table_cb(void *s, void *table, int ret) "s %p table %p ret %d"
-qed_write_table(void *s, uint64_t offset, void *table, unsigned int index, unsigned int n) "s %p offset %"PRIu64" table %p index %u n %u"
-qed_write_table_cb(void *s, void *table, int flush, int ret) "s %p table %p flush %d ret %d"
-
-# block/qed.c
-qed_need_check_timer_cb(void *s) "s %p"
-qed_start_need_check_timer(void *s) "s %p"
-qed_cancel_need_check_timer(void *s) "s %p"
-qed_aio_complete(void *s, void *acb, int ret) "s %p acb %p ret %d"
-qed_aio_setup(void *s, void *acb, int64_t sector_num, int nb_sectors, void *opaque, int flags) "s %p acb %p sector_num %"PRId64" nb_sectors %d opaque %p flags %#x"
-qed_aio_next_io(void *s, void *acb, int ret, uint64_t cur_pos) "s %p acb %p ret %d cur_pos %"PRIu64
-qed_aio_read_data(void *s, void *acb, int ret, uint64_t offset, size_t len) "s %p acb %p ret %d offset %"PRIu64" len %zu"
-qed_aio_write_data(void *s, void *acb, int ret, uint64_t offset, size_t len) "s %p acb %p ret %d offset %"PRIu64" len %zu"
-qed_aio_write_prefill(void *s, void *acb, uint64_t start, size_t len, uint64_t offset) "s %p acb %p start %"PRIu64" len %zu offset %"PRIu64
-qed_aio_write_postfill(void *s, void *acb, uint64_t start, size_t len, uint64_t offset) "s %p acb %p start %"PRIu64" len %zu offset %"PRIu64
-qed_aio_write_main(void *s, void *acb, int ret, uint64_t offset, size_t len) "s %p acb %p ret %d offset %"PRIu64" len %zu"
--- a/Show More
+++ b/Show More
@@ -1 +1 @@
 .7.1
 .4.1