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Name Size
bochs.c 7.2 kB
cloop.c 5 kB
cow.c 8.7 kB
curl.c 13.6 kB
dmg.c 8.3 kB
nbd.c 4.8 kB
parallels.c 4.8 kB
qcow.c 29.4 kB
qcow2-cluster.c 23 kB
qcow2-refcount.c 28 kB
qcow2-snapshot.c 12.2 kB
qcow2.c 30.3 kB
qcow2.h 6.5 kB
raw-posix.c 37.9 kB
raw-win32.c 11.1 kB
vmdk.c 26.4 kB
vpc.c 17.2 kB
vvfat.c 80 kB

Latest revisions

# Date Author Comment
19a3da7f 06/17/2009 06:27 pm Blue Swirl

Fix opening of read only raw images

Signed-off-by: Blue Swirl <>
9923e05e 06/16/2009 11:18 pm Kevin Wolf

update_refcount: Write complete sectors

When updating the refcount blocks in update_refcount(), write complete sectors
instead of updating single entries.

Signed-off-by: Kevin Wolf <>
Signed-off-by: Anthony Liguori <>
9ccb258e 06/16/2009 11:18 pm Kevin Wolf

qcow2: Change default cluster size to 64k

Larger cluster sizes mean less metadata. This has been discussion a few times,
let's do it now. This turns 64k clusters on by default for new images.

Signed-off-by: Kevin Wolf <>
Signed-off-by: Anthony Liguori <>
f7d0fe02 06/16/2009 11:18 pm Kevin Wolf

qcow2: Split out refcount handling

qcow2-refcount.c contains all functions which are related to cluster
allocation and management in the image file. A large part of this is the
reference counting of these clusters.

Also a header file qcow2.h is introduced which will contain the interface of...
45aba42f 06/16/2009 11:18 pm Kevin Wolf

qcow2: Split out guest cluster functions

qcow2-cluster.c contains all functions related to the management of guest
clusters, i.e. what the guest sees on its virtual disk. This code is about
mapping these guest clusters to host clusters in the image file using the...
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...
6583e3c7 06/16/2009 11:18 pm Kevin Wolf

l2_allocate: Write complete sectors

When modifying the L1 table, l2_allocate() needs to write complete sectors
instead of single entries. The L1 table is already in memory, reading it from
disk in the block layer to align the request is wasted performance....
4c1612d9 06/16/2009 11:18 pm Kevin Wolf

alloc_cluster_link_l2: Write complete sectors

When updating the L2 tables in alloc_cluster_link_l2(), write complete
sectors instead of updating single entries.

Signed-off-by: Kevin Wolf <>
Signed-off-by: Anthony Liguori <>
11a1feb6 06/16/2009 11:18 pm Avi Kivity

raw-posix: Remove O_RDWR when attempting to open a file read-only

When we open a file, we first attempt to open it read-write, then fall back
to read-only. Unfortunately we reuse the flags from the previous attempt,
so both attempts try to open the file with write permissions, and fail....

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