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# Date Author Comment
db08adf5 06/06/2009 06:38 pm Kevin Wolf

qemu-img: Print available options with -o ?

This patch adds a small help text to each of the options in the block drivers
which can be displayed by using qemu-img create -f fmt -o ?

Signed-off-by: Kevin Wolf <>
f9e96436 05/28/2009 10:14 am Christoph Hellwig

vvfat: one more missing BlockDriver C99 initializer conversion

Signed-off-by: Christoph Hellwig <>
Signed-off-by: Anthony Liguori <>
c16b5a2c 05/27/2009 05:46 pm Christoph Hellwig

fully split aio_pool from BlockDriver

Now that we have a separate aio pool structure we can remove those
aio pool details from BlockDriver.

Every driver supporting AIO now needs to declare a static AIOPool
with the aiocb size and the cancellation method. This cleans up the...
ad53089b 05/27/2009 05:45 pm Christoph Hellwig

qcow: add qcow_aio_setup helper

[this one is required for [PATCH] fully split aio_pool from BlockDriver,
sorry for not sending it out earlier]

Add a qcow_aio_setup helper to qcow to shared common code between
the aio_readv and aio_writev methods. Based on the function with...
4099df58 05/27/2009 05:45 pm Christoph Hellwig

raw-posix: fix hdev_create

We do need hdev_create unconditionally on all platforms so that qemu-img
create support for host device works on all platforms.

Also relax the check to allow character devices in addition to block
devices. On many Unix platforms block devices have buffered block...
94c6d6d8 05/27/2009 05:45 pm Christoph Hellwig

fix raw_pread_aligned return value

raw_pread_aligned currently returns the raw return value from
lseek/read, which is always -1 in case of an error. But the
callers higher up the stack expect it to return the negated
errno just like raw_pwrite_aligned.
...
91a073a9 05/27/2009 05:45 pm Kevin Wolf

Drop bdrv_create2

This patch converts the remaining users of bdrv_create2 to bdrv_create and
removes the now unused function.

Signed-off-by: Kevin Wolf <>
Signed-off-by: Anthony Liguori <>
a980c98c 05/27/2009 05:45 pm Kevin Wolf

qcow2: Update multiple refcounts at once

Don't write each single changed refcount block entry to the disk after it is
written, but update all entries of the block and write all of them at once.

Signed-off-by: Kevin Wolf <>
Signed-off-by: Anthony Liguori <>
44ff42de 05/27/2009 05:45 pm Kevin Wolf

qcow2: Refactor update_refcount

This is a preparation patch with no functional changes. It moves the allocation
of new refcounts block to a new function and makes update_cluster_refcount (for
one cluster) call update_refcount (for multiple clusters) instead the other way...
ade40677 05/27/2009 05:45 pm Kevin Wolf

qcow/qcow2: Drop synchronous qcow_write()

There is only one (internal) user left and it can be switched to the normal
emulation provided in block.c

Signed-off-by: Kevin Wolf <>
Signed-off-by: Anthony Liguori <>
769ce76d 05/22/2009 06:50 pm Alexander Graf

Add HTTP protocol using curl v6

Currently Qemu can read from posix I/O and NBD. This patch adds a
third protocol to the game: HTTP.

In certain situations it can be useful to access HTTP data directly,
for example if you want to try out an http provided OS image, but...
73c632ed 05/22/2009 06:50 pm Kevin Wolf

qcow2: Allow different cluster sizes

Add an option to specify the cluster size of a newly created qcow2 image.
Default is 4k which is the same value that was hard-coded before.

Signed-off-by: Kevin Wolf <>
Signed-off-by: Anthony Liguori <>
0e7e1989 05/22/2009 06:50 pm Kevin Wolf

Convert all block drivers to new bdrv_create

Now we can make use of the newly introduced option structures. Instead of
having bdrv_create carry more and more parameters (which are format specific in
most cases), just pass a option structure as defined by the driver itself....
eb0b64f7 05/21/2009 04:40 am malc

Do not attempt to allocate sn_tab when there are no snapshots

This was caught by a7d27b536ffc0773028a90f14580552c0c3ddb2a which
aborted on this attempt, thanks to Alex Ivanov for report.

Signed-off-by: malc <>
dcc5e4a0 05/15/2009 01:03 am Anthony Liguori

Fix warning on WIN32

Signed-off-by: Anthony Liguori <>
019d6b8f 05/15/2009 12:13 am Anthony Liguori

Move block drivers into their own directory

Signed-off-by: Anthony Liguori <>