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# Date Author Comment
541dc0d4 09/03/2011 01:45 pm Stefan Weil

Use new macro QEMU_PACKED for packed structures

Most changes were made using these commands:

git grep -la '__attribute__((packed))'|xargs perl -pi -e 's/__attribute__\(\(packed\)\)/QEMU_PACKED/'
git grep -la '__attribute__ ((packed))'|xargs perl -pi -e 's/__attribute__ \(\(packed\)\)/QEMU_PACKED/'...

6cbc3031 08/23/2011 03:15 pm Philipp Hahn

qcow2: Fix DEBUG_* compilation

By introducing BlockDriverState compiling qcow2 with DEBUG_ALLOC and DEBUG_EXT
defined got broken.
Define a BdrvCheckResult structure locally which is now needed as the second
argument.

Also fix qcow2_read_extensions() needing BDRVQcowState....

7267c094 08/21/2011 07:01 am Anthony Liguori

Use glib memory allocation and free functions

qemu_malloc/qemu_free no longer exist after this commit.

Signed-off-by: Anthony Liguori <>

35d7ace7 08/05/2011 03:15 pm Kevin Wolf

qcow2: Fix L1 table size after bdrv_snapshot_goto

When loading an internal snapshot whose L1 table is smaller than the current L1
table, the size of the current L1 would be shrunk to the snapshot's L1 size in
memory, but not on disk. This lead to incorrect refcount updates and eventuelly...

7c80ab3f 12/17/2010 05:15 pm Jes Sorensen

block/qcow2.c: rename qcow_ functions to qcow2_

It doesn't really make sense for functions in qcow2.c to be named
qcow_ so convert the names to match correctly.

Signed-off-by: Jes Sorensen <>
Signed-off-by: Kevin Wolf <>

72893756 10/22/2010 03:49 pm Stefan Hajnoczi

qcow2: Support exact L1 table growth

The L1 table grow operation includes a size calculation that bumps up
the new L1 table size in order to anticipate the size needs of vmstate
data. This helps reduce the number of times that the L1 table has to be
grown when vmstate data is appended....

51ef6727 10/22/2010 03:49 pm edison

Copy snapshots out of QCOW2 disk

In order to backup snapshots, created from QCOW2 iamge, we want to copy snapshots out of QCOW2 disk to a seperate storage.
The following patch adds a new option in "qemu-img": qemu-img convert -f qcow2 -O qcow2 -s snapshot_name src_img bck_img....

29216ed1 09/21/2010 04:39 pm Kevin Wolf

qcow2: Move sync out of qcow2_alloc_clusters

Signed-off-by: Kevin Wolf <>

8b3b7206 06/22/2010 03:38 pm Kevin Wolf

qcow2: Use bdrv_(p)write_sync for metadata writes

Use bdrv_(p)write_sync to ensure metadata integrity in case of a crash.

Signed-off-by: Kevin Wolf <>

66f82cee 05/03/2010 11:07 am Kevin Wolf

block: Open the underlying image file in generic code

Format drivers shouldn't need to bother with things like file names, but rather
just get an open BlockDriverState for the underlying protocol. This patch
introduces this behaviour for bdrv_open implementation. For protocols which...

5d757b56 01/26/2010 10:59 pm Kevin Wolf

qcow2: Don't ignore qcow2_alloc_clusters return value

Now that qcow2_alloc_clusters can return error codes, we must handle them in
the callers of qcow2_alloc_clusters.

Signed-off-by: Kevin Wolf <>
Signed-off-by: Anthony Liguori <>

702ef63f 12/03/2009 07:45 pm Kevin Wolf

qcow2: Fix some more qemu_malloc fallout

Oh joy...

Signed-off-by: Kevin Wolf <>
Signed-off-by: Anthony Liguori <>

14899cdf 06/29/2009 04:52 pm Filip Navara

Fix QCOW2 debugging code to compile again

Updated to use C99 comments.

Signed-off-by: Filip Navara <>
Signed-off-by: Anthony Liguori <>

c142442b 06/16/2009 11:18 pm Kevin Wolf

qcow2: Split out snapshot functions

qcow2-snapshot.c contains the code related to snapshotting.

Signed-off-by: Kevin Wolf <>
Signed-off-by: Anthony Liguori <>

ed6ccf0f 06/16/2009 11:18 pm Kevin Wolf

qcow2: Rename global functions

The qcow2 source is now split into several more manageable files. During the
conversion quite some functions that were static before needed to be changed to
be global to make the source compile again.

We were lucky enough not to get name conflicts with these additional global...