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root / block @ 31ca6d07

Name Size
Makefile.objs 832 Bytes
blkdebug.c 15.8 kB
blkverify.c 10.1 kB
bochs.c 7.1 kB
cloop.c 5.9 kB
commit.c 7.3 kB
cow.c 9.5 kB
curl.c 16.8 kB
dmg.c 10.3 kB
gluster.c 17.1 kB
iscsi.c 34.4 kB
linux-aio.c 5.5 kB
mirror.c 18.7 kB
nbd.c 18.4 kB
parallels.c 4.8 kB
qcow.c 27.8 kB
qcow2-cache.c 7.8 kB
qcow2-cluster.c 43.2 kB
qcow2-refcount.c 41.3 kB
qcow2-snapshot.c 18.6 kB
qcow2.c 52.5 kB
qcow2.h 12.2 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 46 kB
qed.h 10.8 kB
raw-aio.h 1.6 kB
raw-posix.c 49.1 kB
raw-win32.c 15.8 kB
raw.c 3.9 kB
rbd.c 25.4 kB
sheepdog.c 57 kB
ssh.c 28.8 kB
stream.c 6.7 kB
vdi.c 24.7 kB
vmdk.c 49.4 kB
vpc.c 23.3 kB
vvfat.c 81.6 kB
win32-aio.c 5.9 kB

Latest revisions

# Date Author Comment
31ca6d07 04/22/2013 11:27 am Kevin Wolf

block: Add driver-specific options for backing files

Options starting in "backing." are passed to the backing file now. If
you don't need to specify the filename for the backing file, you can add
it on the command line instead of in the image file:

$ qemu-nbd -t /tmp/test.img...
f4d38bef 04/22/2013 11:27 am Stefan Hajnoczi

qcow2: allow sub-cluster compressed write to last cluster

Compression in qcow2 requires image length to be a multiple of the
cluster size. Lift this requirement by zero-padding the final cluster
when necessary. The virtual disk size is still not cluster-aligned, so...
16b3c5cd 04/22/2013 11:27 am Stefan Hajnoczi

qcow: allow sub-cluster compressed write to last cluster

Compression in qcow requires image length to be a multiple of the
cluster size. Lift this requirement by zero-padding the final cluster
when necessary. The virtual disk size is still not cluster-aligned, so...
c7a101f5 04/19/2013 12:45 pm Richard W.M. Jones

ssh: Remove unnecessary use of strlen function.

Reviewed-by: Eric Blake <>
Reviewed-by: Stefan Weil <>

Signed-off-by: Stefan Hajnoczi <>
6ae7d660 04/19/2013 12:44 pm Stefan Weil

block/ssh: Add missing gcc format attributes

Now gcc will check whether format string and variable arguments match.

Signed-off-by: Stefan Weil <>
Signed-off-by: Stefan Hajnoczi <>
0a12ec87 04/15/2013 11:18 am Richard W.M. Jones

block: Add support for Secure Shell (ssh) block device.

qemu-system-x86_64 -drive file=ssh://hostname/some/image

QEMU will ssh into 'hostname' and open '/some/image' which is made
available as a standard block device.

You can specify a username (ssh://user@host/...) and/or a port number...
9a2d462e 04/15/2013 11:18 am Richard W.M. Jones

block: ssh: Use libssh2_sftp_fsync (if supported by libssh2) to flush to disk.

libssh2_sftp_fsync is an extension to libssh2 to support fsync(2) over
sftp, which is itself an extension of OpenSSH.

If both libssh2 and the ssh daemon support it, this will allow...
dc7588c1 04/15/2013 11:18 am Josh Durgin

rbd: add an asynchronous flush

The existing bdrv_co_flush_to_disk implementation uses rbd_flush(),
which is sychronous and causes the main qemu thread to block until it
is complete. This results in unresponsiveness and extra latency for
the guest.

Fix this by using an asynchronous version of flush. This was added to...
cf8074b3 04/15/2013 09:26 am Kevin Wolf

block: Introduce bdrv_writev_vmstate

Signed-off-by: Kevin Wolf <>
Signed-off-by: Stefan Hajnoczi <>
8d3b1a2d 04/15/2013 09:26 am Kevin Wolf

block: Introduce bdrv_pwritev() for qcow2_save_vmstate

Directly pass the QEMUIOVector on instead of linearising it.

Signed-off-by: Kevin Wolf <>
Signed-off-by: Stefan Hajnoczi <>

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