Eric Sunshine c794b4e0fd Teach block/vdi about "discarded" (no longer allocated) blocks ... An entry in the VDI block map will hold an offset to the actual block if the block is allocated, or one of two specially-interpreted values if not allocated. Using VirtualBox terminology, value VDI_IMAGE_BLOCK_FREE (0xffffffff) represents a never-allocated block (semantically arbitrary content). VDI_IMAGE_BLOCK_ZERO (0xfffffffe) represents a "discarded" block (semantically zero-filled). block/vdi knows only about VDI_IMAGE_BLOCK_FREE. Teach it about VDI_IMAGE_BLOCK_ZERO. Signed-off-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>		2011-10-28 19:25:49 +02:00
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blkdebug.c	block: drop redundant bdrv_flush implementation	2011-10-21 17:34:13 +02:00
blkverify.c	block: drop redundant bdrv_flush implementation	2011-10-21 17:34:13 +02:00
bochs.c	block: take lock around bdrv_read implementations	2011-10-21 17:34:14 +02:00
cloop.c	block: take lock around bdrv_read implementations	2011-10-21 17:34:14 +02:00
cow.c	block: change flush to co_flush	2011-10-21 17:34:14 +02:00
curl.c	block/curl: Don't finish AIOCBs too early	2011-09-21 15:16:04 +02:00
dmg.c	block: take lock around bdrv_read implementations	2011-10-21 17:34:14 +02:00
iscsi.c	iSCSI block driver	2011-10-28 19:25:48 +02:00
nbd.c	block: take lock around bdrv_write implementations	2011-10-21 17:34:14 +02:00
parallels.c	block: take lock around bdrv_read implementations	2011-10-21 17:34:14 +02:00
qcow2-cache.c	Use glib memory allocation and free functions	2011-08-20 23:01:08 -05:00
qcow2-cluster.c	qcow2: Fix bdrv_write_compressed error handling	2011-10-21 17:34:13 +02:00
qcow2-refcount.c	qcow2: remove unused qcow2_create_refcount_update function	2011-08-25 15:23:10 +02:00
qcow2-snapshot.c	Use new macro QEMU_PACKED for packed structures	2011-09-03 10:45:59 +00:00
qcow2.c	block: change discard to co_discard	2011-10-21 17:34:14 +02:00
qcow2.h	qcow2: removed unused depends_on field	2011-09-12 15:17:17 +02:00
qcow.c	block: change flush to co_flush	2011-10-21 17:34:14 +02:00
qed-check.c	Use glib memory allocation and free functions	2011-08-20 23:01:08 -05:00
qed-cluster.c	Use glib memory allocation and free functions	2011-08-20 23:01:08 -05:00
qed-gencb.c	Use glib memory allocation and free functions	2011-08-20 23:01:08 -05:00
qed-l2-cache.c	Use glib memory allocation and free functions	2011-08-20 23:01:08 -05:00
qed-table.c	qed: fix use-after-free during l2 cache commit	2011-10-05 10:52:31 -05:00
qed.c	block: drop redundant bdrv_flush implementation	2011-10-21 17:34:13 +02:00
qed.h	qed: Periodically flush and clear need check bit	2011-05-18 14:38:46 +02:00
raw-posix-aio.h	Remove aio_ctx from paio_* interface	2009-10-30 08:39:34 -05:00
raw-posix.c	block: change discard to co_discard	2011-10-21 17:34:14 +02:00
raw-win32.c	block: change flush to co_flush	2011-10-21 17:34:14 +02:00
raw.c	block: add bdrv_co_discard and bdrv_aio_discard support	2011-10-21 17:34:13 +02:00
rbd.c	block: change flush to co_flush	2011-10-21 17:34:14 +02:00
sheepdog.c	sheepdog: add coroutine_fn markers	2011-10-21 17:34:12 +02:00
vdi.c	Teach block/vdi about "discarded" (no longer allocated) blocks	2011-10-28 19:25:49 +02:00
vmdk.c	block: change flush to co_flush	2011-10-21 17:34:14 +02:00
vpc.c	block: change flush to co_flush	2011-10-21 17:34:14 +02:00
vvfat.c	block: take lock around bdrv_write implementations	2011-10-21 17:34:14 +02:00