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root / block @ 8c116b0e

Name Size
Makefile.objs 954 Bytes
backup.c 11.9 kB
blkdebug.c 18.5 kB
blkverify.c 12 kB
bochs.c 7.1 kB
cloop.c 5.9 kB
commit.c 7.3 kB
cow.c 12.1 kB
curl.c 18.5 kB
dmg.c 10.4 kB
gluster.c 19.1 kB
iscsi.c 45.2 kB
linux-aio.c 5.2 kB
mirror.c 19.1 kB
nbd.c 18.8 kB
parallels.c 4.9 kB
qapi.c 20.3 kB
qcow.c 28.4 kB
qcow2-cache.c 8.6 kB
qcow2-cluster.c 54.1 kB
qcow2-refcount.c 58.7 kB
qcow2-snapshot.c 21.1 kB
qcow2.c 70.6 kB
qcow2.h 16.4 kB
qed-check.c 6.5 kB
qed-cluster.c 5.1 kB
qed-gencb.c 688 Bytes
qed-l2-cache.c 5.9 kB
qed-table.c 8.4 kB
qed.c 47.1 kB
qed.h 10.8 kB
raw-aio.h 1.6 kB
raw-posix.c 56.2 kB
raw-win32.c 17.4 kB
raw_bsd.c 6.1 kB
rbd.c 26.7 kB
sheepdog.c 69.3 kB
snapshot.c 10.7 kB
ssh.c 29.1 kB
stream.c 7 kB
vdi.c 25.2 kB
vhdx-endian.c 5.2 kB
vhdx-log.c 28.4 kB
vhdx.c 61.9 kB
vhdx.h 19.1 kB
vmdk.c 59.1 kB
vpc.c 24.7 kB
vvfat.c 84.7 kB
win32-aio.c 5.7 kB

Latest revisions

# Date Author Comment
7b4c4781 12/04/2013 04:19 pm Wenchao Xia

snapshot: distinguish id and name in load_tmp

Since later this function will be used so improve it. The only caller of it
now is qemu-img, and it is not impacted by introduce function
bdrv_snapshot_load_tmp_by_id_or_name() that call bdrv_snapshot_load_tmp()...
8c116b0e 12/04/2013 04:19 pm Wenchao Xia

qemu-nbd: support internal snapshot export

Now it is possible to directly export an internal snapshot, which
can be used to probe the snapshot's contents without qemu-img
convert.

Signed-off-by: Wenchao Xia <>
Signed-off-by: Stefan Hajnoczi <>
f8413b3c 12/04/2013 12:29 pm Kevin Wolf

qcow2: Zero-initialise first cluster for new images

Strictly speaking, this is only required for has_zero_init() == false,
but it's easy enough to just do a cluster-aligned write that is padded
with zeros after the header.

This fixes that after 'qemu-img create' header extensions are attempted...
cffb1ec6 12/03/2013 04:26 pm Paolo Bonzini

block drivers: expose requirement for write same alignment from formats

This will let misaligned but large requests use zero clusters. This
is important because the cluster size is not guest visible.

Signed-off-by: Paolo Bonzini <>
Reviewed-by: Peter Lieven <>...
4b52498e 12/03/2013 04:26 pm Peter Lieven

block/iscsi: remove .bdrv_has_zero_init

since commit 3ac21627 the default value changed to 0.

Signed-off-by: Peter Lieven <>
Signed-off-by: Paolo Bonzini <>
Signed-off-by: Stefan Hajnoczi <>
2af8a1a7 12/03/2013 04:26 pm Peter Lieven

block/iscsi: updated copyright

added myself to reflect recent work on the iscsi block driver.

Signed-off-by: Peter Lieven <>
Signed-off-by: Paolo Bonzini <>
Signed-off-by: Stefan Hajnoczi <>
fa6252b0 12/03/2013 04:26 pm Paolo Bonzini

block/iscsi: check WRITE SAME support differently depending on MAY_UNMAP

The current check is right for MAY_UNMAP=1. For MAY_UNMAP=0, just
try and fall back to regular writes as soon as a WRITE SAME command
fails.

Signed-off-by: Paolo Bonzini <>...
260a82e5 12/03/2013 04:26 pm Paolo Bonzini

raw-posix: implement write_zeroes with MAY_UNMAP for files

Writing zeroes to a file can be done by punching a hole if
MAY_UNMAP is set.

Note that in this case ENOTSUP is not ignored, but makes
the block layer fall back to the generic implementation.

Signed-off-by: Paolo Bonzini <>...
d0b4503e 12/03/2013 04:26 pm Paolo Bonzini

raw-posix: implement write_zeroes with MAY_UNMAP for block devices

See the next commit for the description of the Linux kernel problem
that is worked around in raw_open_common.

Signed-off-by: Paolo Bonzini <>
Signed-off-by: Stefan Hajnoczi <>
97a2ae34 12/03/2013 04:26 pm Paolo Bonzini

raw-posix: add support for write_zeroes on XFS and block devices

The code is similar to the implementation of discard and write_zeroes
with UNMAP. However, failure must be propagated up to block.c.

The stale page cache problem can be reproduced as follows:...

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