Pekka Enberg 3ecac800ec kvm tools, qcow: Add support for writing to zero refcount clusters ...

This patch adds support for writing to zero refcount clusters. Refcount blocks
are cached in like L2 tables and flushed upon VIRTIO_BLK_T_FLUSH and when
evicted from the LRU cache.

With this patch applied, 'qemu-img check' no longer complains about referenced
clusters with zero reference count after

  dd if=/dev/zero of=/mnt/tmp

where '/mnt' is freshly generated QCOW2 image.

Cc: Asias He <asias.hejun@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Kevin Wolf <kwolf@redhat.com>
Cc: Prasad Joshi <prasadjoshi124@gmail.com>
Cc: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

2015-06-01 16:39:46 +01:00

..

blk.c

kvm tools: Rename raw_image_ops to blk_dev_ops

2015-06-01 16:39:44 +01:00

core.c

kvm tools, qcow: Force read-only mode for QCOW images

2015-06-01 16:39:46 +01:00

qcow.c

kvm tools, qcow: Add support for writing to zero refcount clusters

2015-06-01 16:39:46 +01:00

raw.c

kvm tools: Rename struct disk_image_operations ops name for raw image

2015-06-01 16:39:44 +01:00