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root / block @ e641c1e8

Name Size
Makefile.objs 916 Bytes
backup.c 11.8 kB
blkdebug.c 17.5 kB
blkverify.c 11.7 kB
bochs.c 7.1 kB
cloop.c 5.9 kB
commit.c 7.3 kB
cow.c 10.4 kB
curl.c 18.5 kB
dmg.c 10.3 kB
gluster.c 18.9 kB
iscsi.c 36.3 kB
linux-aio.c 5.2 kB
mirror.c 18.8 kB
nbd.c 18.7 kB
parallels.c 4.8 kB
qapi.c 16.3 kB
qcow.c 27.8 kB
qcow2-cache.c 8.4 kB
qcow2-cluster.c 44.7 kB
qcow2-refcount.c 58.8 kB
qcow2-snapshot.c 19.3 kB
qcow2.c 56.1 kB
qcow2.h 15 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 49.6 kB
raw-win32.c 16.9 kB
raw_bsd.c 5.7 kB
rbd.c 25.9 kB
sheepdog.c 63.7 kB
snapshot.c 4.1 kB
ssh.c 29 kB
stream.c 6.9 kB
vdi.c 24.8 kB
vhdx.c 30.4 kB
vhdx.h 14.8 kB
vmdk.c 54.6 kB
vpc.c 23.7 kB
vvfat.c 84.5 kB
win32-aio.c 5.7 kB

Latest revisions

# Date Author Comment
68dc0364 09/06/2013 04:25 pm Stefan Weil

w32: Fix access to host devices (regression)

QEMU failed to open host devices like \\.\PhysicalDrive0 (first hard disk)
since some time (commit 8a79380b8ef1b02d2abd705dd026a18863b09020?).

Those devices use hdev_open which did not use the latest API for options....
3d34c6cd 09/06/2013 04:25 pm Fam Zheng

vvfat: use bdrv_new() to allocate BlockDriverState

we need bdrv_new() to properly initialize BDS, don't allocate memory
manually.

Signed-off-by: Fam Zheng <>
Signed-off-by: Stefan Hajnoczi <>
13c91cb7 09/06/2013 04:25 pm Fam Zheng

iscsi: use bdrv_new() instead of stack structure

BlockDriverState structure needs bdrv_new() to initialize refcnt, don't
allocate a local structure variable and memset to 0, becasue with coming
refcnt implementation, bdrv_unref will crash if bs->refcnt not...
4f6fd349 09/06/2013 04:25 pm Fam Zheng

block: make bdrv_delete() static

Manage BlockDriverState lifecycle with refcnt, so bdrv_delete() is no
longer public and should be called by bdrv_unref() if refcnt is
decreased to 0.

This is an identical change because effectively, there's no multiple
reference of BDS now: no caller of bdrv_ref() yet, only bdrv_new() sets...
276cbc7f 09/06/2013 04:25 pm Paolo Bonzini

cow: make reads go at a decent speed

Do not do two reads for each sector; load each sector of the bitmap
and use bitmap operations to process it.

Writes are still dog slow!

Reviewed-by: Eric Blake <>
Signed-off-by: Paolo Bonzini <>...
26ae9804 09/06/2013 04:25 pm Paolo Bonzini

cow: make writes go at a less indecent speed

Only sync once per write, rather than once per sector.

Reviewed-by: Eric Blake <>
Signed-off-by: Paolo Bonzini <>
Signed-off-by: Stefan Hajnoczi <>
e641c1e8 09/06/2013 04:25 pm Paolo Bonzini

cow: do not call bdrv_co_is_allocated

As we change bdrv_is_allocated to gather more information from bs and
bs->file, it will become a bit slower. It is still appropriate for online
jobs, but not for reads/writes. Call the internal function instead.

Reviewed-by: Eric Blake <>...
cc0681c4 09/06/2013 04:25 pm Benoît Canet

block: Enable the new throttling code in the block layer.

Signed-off-by: Benoit Canet <>
Signed-off-by: Stefan Hajnoczi <>
3e9fab69 09/06/2013 04:25 pm Benoît Canet

block: Add support for throttling burst max in QMP and the command line.

The max parameter of the leaky bucket throttling algorithm can be used to
allow the guest to do bursts.
The max value is a pool of I/O that the guest can use without being throttled...
2024c1df 09/06/2013 04:25 pm Benoît Canet

block: Add iops_size to do the iops accounting for a given io size.

This feature can be used in case where users are avoiding the iops limit by
doing jumbo I/Os hammering the storage backend.

Signed-off-by: Benoit Canet <>
Signed-off-by: Stefan Hajnoczi <>

View revisions

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