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# Date Author Comment
d5124c00 09/12/2013 11:12 am Max Reitz

bdrv: Use "Error" for creating images

Add an Error ** parameter to BlockDriver.bdrv_create to allow more
specific error messages.

Signed-off-by: Max Reitz <>
015a1036 09/12/2013 11:12 am Max Reitz

bdrv: Use "Error" for opening images

Add an Error ** parameter to BlockDriver.bdrv_open and
BlockDriver.bdrv_file_open to allow more specific error messages.

Signed-off-by: Max Reitz <>
56e023af 09/12/2013 11:12 am Tal Kain

raw-win32.c: Fix incorrect handling behaviour of small block files

It is a valid case that the read data's size is smaller than the
requested size since there could be files that are smaller than
the minimum block size (For ex. when a VMDK disk descriptor file)...
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....
3ac21627 06/28/2013 02:52 pm Peter Lieven

block: change default of .has_zero_init to 0

.has_zero_init defaults to 1 for all formats and protocols.

this is a dangerous default since this means that all
new added drivers need to manually overwrite it to 0 if
they do not ensure that a device is zero initialized...
56d1b4d2 04/22/2013 12:34 pm Kevin Wolf

block: Remove filename parameter from .bdrv_file_open()

It is unused now in all block drivers.

Signed-off-by: Kevin Wolf <>
Reviewed-by: Eric Blake <>
8a79380b 04/22/2013 11:27 am Kevin Wolf

raw-win32: Use bdrv_open options instead of filename

Signed-off-by: Kevin Wolf <>
Reviewed-by: Eric Blake <>
ea804cad 03/25/2013 10:53 am Stefan Weil

block: Add options QDict to bdrv_file_open() prototypes (fix MinGW build)

The new parameter is unused yet.

This part was missing in commit 787e4a8500020695eb391e2f1cc4767ee071d441.

Cc: Kevin Wolf <>
Cc: Eric Blake <>
Signed-off-by: Stefan Weil <>...
c4d9d196 03/15/2013 05:07 pm Stefan Hajnoczi

threadpool: drop global thread pool

Now that each AioContext has a ThreadPool and the main loop AioContext
can be fetched with bdrv_get_aio_context(), we can eliminate the concept
of a global thread pool from thread-pool.c.

The submit functions must take a ThreadPool* argument....
fccedc62 01/02/2013 05:08 pm Stefan Weil

block/raw-win32: Fix compiler warnings (wrong format specifiers)

Commit fbcad04d6bfdff937536eb23088a01a280a1a3af added fprintf statements
with wrong format specifiers.

GetLastError() returns a DWORD which is unsigned long, so %lu must be used.

Signed-off-by: Stefan Weil <>...
1de7afc9 12/19/2012 09:32 am Paolo Bonzini

misc: move include files to include/qemu/

Signed-off-by: Paolo Bonzini <>
737e150e 12/19/2012 09:31 am Paolo Bonzini

block: move include files to include/block/

Signed-off-by: Paolo Bonzini <>
fbcad04d 12/11/2012 12:36 pm Fabien Chouteau

Fix error code checking for SetFilePointer() call

An error has occurred if the return value is invalid_set_file_pointer
and getlasterror doesn't return no_error.

Signed-off-by: Fabien Chouteau <>
Acked-by: Stefan Hajnoczi <>
fc4edb84 10/31/2012 11:38 am Paolo Bonzini

raw-win32: add emulated AIO support

Signed-off-by: Paolo Bonzini <>
a2736526 10/31/2012 11:38 am Paolo Bonzini

raw-win32: implement native asynchronous I/O

With the new support for EventNotifiers in the AIO event loop, we
can hook a completion port to every opened file and use asynchronous
I/O on them.

Wine's support is extremely inefficient, also because it really does...
6a8dc042 09/24/2012 04:15 pm Jeff Cody

block: move open flag parsing in raw block drivers to helper functions

Code motion, to move parsing of open flags into a helper function.

Signed-off-by: Jeff Cody <>
Signed-off-by: Kevin Wolf <>
39c9fb95 09/24/2012 04:15 pm Jeff Cody

block: do not parse BDRV_O_CACHE_WB in block drivers

Block drivers should ignore BDRV_O_CACHE_WB in .bdrv_open flags,
and in the bs->open_flags.

This patch removes the code, leaving the behaviour behind as if
BDRV_O_CACHE_WB was set.

Signed-off-by: Jeff Cody <>...
6165f4d8 08/15/2012 11:48 am Corey Bryant

block: Convert open calls to qemu_open

This patch converts all block layer open calls to qemu_open.

Note that this adds the O_CLOEXEC flag to the changed open paths
when the O_CLOEXEC macro is defined.

Signed-off-by: Corey Bryant <>...
2e1e79da 08/15/2012 11:48 am Corey Bryant

block: Convert close calls to qemu_close

This patch converts all block layer close calls, that correspond
to qemu_open calls, to qemu_close.

Signed-off-by: Corey Bryant <>
Signed-off-by: Kevin Wolf <>
c68b89ac 11/11/2011 03:02 pm Kevin Wolf

block: Rename bdrv_co_flush to bdrv_co_flush_to_disk

There are two different types of flush that you can do: Flushing one level up
to the OS (i.e. writing data to the host page cache) or flushing it all the way
down to the disk. The existing functions flush to the disk, reflect this in the...
8b94ff85 10/21/2011 06:34 pm Paolo Bonzini

block: change flush to co_flush

Since coroutine operation is now mandatory, convert all bdrv_flush
implementations to coroutines. For qcow2, this means taking the lock.
Other implementations are simpler and just forward bdrv_flush to the
underlying protocol, so they can avoid the lock....
2c993ec2 08/22/2011 06:19 pm Stefan Weil

w32: Fix qemu_ftruncate64

SetFilePointer returns INVALID_SET_FILE_POINTER when it fails.
In addition, GetLastError must be checked.

The first call of SetFilePointer did not use INVALID_SET_FILE_POINTER,
the second call used wrong error handling.

Signed-off-by: Stefan Weil <>...
02266d54 08/01/2011 01:10 pm Markus Armbruster

block/raw-win32: Drop disabled code for removable host devices

It's been disabled since the start (commit 19cb3738, Aug 2006), and
has been untouched except for spelling fixes and such. I don't feel
like dragging it along any further.

Signed-off-by: Markus Armbruster <>...
4a1d5e1f 07/19/2011 04:39 pm Fam Zheng

block: add bdrv_get_allocated_file_size() operation

qemu-img.c wants to count allocated file size of image. Previously it
counts a single bs->file by 'stat' or Window API. As VMDK introduces
multiple file support, the operation becomes format specific with...
a6599793 06/08/2011 11:39 am Christoph Hellwig

block: clarify the meaning of BDRV_O_NOCACHE

Change BDRV_O_NOCACHE to only imply bypassing the host OS file cache,
but no writeback semantics. All existing callers are changed to also
specify BDRV_O_CACHE_WB to give them writeback semantics.

Signed-off-by: Christoph Hellwig <>...
1b40bbd1 01/31/2011 11:03 am Kevin Wolf

raw-win32: Fix bdrv_flush return value

Signed-off-by: Kevin Wolf <>
cfd07e7a 11/07/2010 05:10 pm Blue Swirl

Fix win32 build

Fix a return value change missed by
205ef7961f781496366e0a93a4ec621ad3724bd7.

Signed-off-by: Blue Swirl <>
205ef796 11/04/2010 01:52 pm Kevin Wolf

block: Allow bdrv_flush to return errors

This changes bdrv_flush to return 0 on success and -errno in case of failure.
It's a requirement for implementing proper error handle in users of bdrv_flush.

Signed-off-by: Kevin Wolf <>
Reviewed-by: Stefan Hajnoczi <>
336c1c12 08/03/2010 04:57 pm Kevin Wolf

block: Fix bdrv_has_zero_init

Assuming that any image on a block device is not properly zero-initialized is
actually wrong: Only raw images have this problem. Any other image format
shouldn't care about it, they initialize everything properly themselves....
84a12e66 05/03/2010 11:07 am Christoph Hellwig

block: separate raw images from the file protocol

We're running into various problems because the "raw" file access, which
is used internally by the various image formats is entangled with the
"raw" image format, which maps the VM view 1:1 to a file system....
66f82cee 05/03/2010 11:07 am Kevin Wolf

block: Open the underlying image file in generic code

Format drivers shouldn't need to bother with things like file names, but rather
just get an open BlockDriverState for the underlying protocol. This patch
introduces this behaviour for bdrv_open implementation. For protocols which...
9a2d77ad 01/26/2010 11:42 pm Christoph Hellwig

block: kill BDRV_O_CREAT

The BDRV_O_CREAT option is unused inside qemu and partially duplicates
the bdrv_create method. Remove it, and the -C option to qemu-io which
isn't used in qemu-iotests anyway.

Signed-off-by: Christoph Hellwig <>
Signed-off-by: Anthony Liguori <>
f5edb014 01/20/2010 04:25 pm Naphtali Sprei

Clean-up a little bit the RW related bits of BDRV_O_FLAGS. BDRV_O_RDONLY gone (and so is BDRV_O_ACCESS). Default value for bdrv_flags (0/zero) is READ-ONLY. Need to explicitly request READ-WRITE.

Instead of using the field 'readonly' of the BlockDriverState struct for passing the request,...
508c7cb3 06/15/2009 03:04 pm Christoph Hellwig

block: add bdrv_probe_device method

Add a bdrv_probe_device method to all BlockDriver instances implementing
host devices to move matching of host device types into the actual drivers.
For now we keep exacly the old matching behaviour based on the devices names,...
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 <>
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....
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 <>