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root / block @ 893a9cb4

Name Size
blkdebug.c 12.7 kB
bochs.c 6.6 kB
cloop.c 4.9 kB
cow.c 8.9 kB
curl.c 14.8 kB
dmg.c 8.3 kB
nbd.c 4.7 kB
parallels.c 4.4 kB
qcow.c 29.9 kB
qcow2-cluster.c 26.7 kB
qcow2-refcount.c 38.2 kB
qcow2-snapshot.c 12.5 kB
qcow2.c 40.3 kB
qcow2.h 6.9 kB
raw-posix-aio.h 1.3 kB
raw-posix.c 35.6 kB
raw-win32.c 11 kB
raw.c 3.5 kB
vdi.c 29.1 kB
vmdk.c 25.4 kB
vpc.c 17.8 kB
vvfat.c 80.3 kB

Latest revisions

# Date Author Comment
122bb9e3 06/15/2010 10:41 am Christoph Hellwig

cow: use pread/pwrite

Use pread/pwrite instead of lseek + read/write in preparation of using the
qemu block API.

Signed-off-by: Christoph Hellwig <>
Signed-off-by: Kevin Wolf <>
893a9cb4 06/15/2010 10:41 am Christoph Hellwig

cow: stop using mmap

We don't have an equivalent to mmap in the qemu block API, so read and
write the bitmap directly. At least in the dumb implementation added
in this patch this is a lot less efficient, but it means cow can also
work on windows, and over nbd or curl. And it fixes qemu-iotests testcase...
6c6ea921 06/15/2010 10:41 am Kevin Wolf

vpc: Read/write multiple sectors at once

This changes the vpc block driver (for VHD) to read/write multiple sectors at
once instead of doing a request for each single sector.

Before this, running qemu-iotests for VPC took ages, now it's actually quite
reasonable to run it always (down from ~1 hour to 40 seconds for me)....
018faafd 06/15/2010 10:41 am Kevin Wolf

qcow2: Allow get_refcount to return errors

get_refcount might need to load a refcount block from disk, so errors may
happen. Return the error code instead of assuming a refcount of 1 and change
the callers to respect error return values.

Signed-off-by: Kevin Wolf <>
2eaa8f63 06/15/2010 10:41 am Kevin Wolf

qcow2: Allow alloc_clusters_noref to return errors

Currently it would consider blocks for which get_refcount fails used. However,
it's unlikely that get_refcount would succeed for the next cluster, so it's not
really helpful. Return an error instead.

Signed-off-by: Kevin Wolf <>
e14e8ba5 06/15/2010 10:41 am Kevin Wolf

qcow2: Return real error code in load_refcount_block

This fixes load_refcount_block which completely ignored the return value of
write_refcount_block and always returned -EIO for bdrv_pwrite failure.

Signed-off-by: Kevin Wolf <>
68dba0bf 06/15/2010 10:41 am Kevin Wolf

qcow2: Restore L1 entry on l2_allocate failure

If writing the L1 table to disk failed, we need to restore its old content in
memory to avoid inconsistencies.

Reported-by: Juan Quintela <>
Signed-off-by: Kevin Wolf <>
a4673e27 06/14/2010 06:33 pm Anthony Liguori

Merge remote branch 'kwolf/for-anthony' into staging

Conflicts:
hw/pc.c
11165820 06/13/2010 09:00 pm Paul Brook

Move stdbool.h

Move inclusion of stdbool.h to common header files, instead of including
in an ad-hoc manner.

Signed-off-by: Paul Brook <>
9040385d 06/04/2010 12:43 pm Jes Sorensen

Cleanup: raw-posix.c: Be more consistent using BDRV_SECTOR_SIZE instead of 512

Clean up raw-posix.c to be more consistent using BDRV_SECTOR_SIZE
instead of hard coded 512 values.

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

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