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2016-07-18linux-aio: share one LinuxAioState within an AioContextPaolo Bonzini1-1/+1
This has better performance because it executes fewer system calls and does not use a bottom half per disk. Originally proposed by Ming Lei. [Changed #include "raw-aio.h" to "block/raw-aio.h" in win32-aio.c to fix build error as reported by Peter Maydell <peter.maydell@linaro.org>. --Stefan] Acked-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Message-id: 1467650000-51385-1-git-send-email-pbonzini@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> squash! linux-aio: share one LinuxAioState within an AioContext
2016-01-20block: Clean up includesPeter Maydell1-0/+1
Clean up includes so that osdep.h is included first and headers which it implies are not included manually. This commit was created with scripts/clean-includes. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2015-10-23aio: Add "is_external" flag for event handlersFam Zheng1-2/+3
All callers pass in false, and the real external ones will switch to true in coming patches. Signed-off-by: Fam Zheng <famz@redhat.com> Reviewed-by: Jeff Cody <jcody@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-20block: Rename BlockDriverCompletionFunc to BlockCompletionFuncMarkus Armbruster1-1/+1
I'll use it with block backends shortly, and the name is going to fit badly there. It's a block layer thing anyway, not just a block driver thing. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-10-20block: Rename BlockDriverAIOCB* to BlockAIOCB*Markus Armbruster1-2/+2
I'll use BlockDriverAIOCB with block backends shortly, and the name is going to fit badly there. It's a block layer thing anyway, not just a block driver thing. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-09-22block: Rename qemu_aio_release -> qemu_aio_unrefFam Zheng1-2/+2
Suggested-by: Benoît Canet <benoit.canet@irqsave.net> Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2014-09-22win32-aio: Drop win32_aiocb_info.cancelFam Zheng1-14/+0
Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2014-08-15raw-win32: Handle failure for potentially large allocationsKevin Wolf1-1/+5
Some code in the block layer makes potentially huge allocations. Failure is not completely unexpected there, so avoid aborting qemu and handle out-of-memory situations gracefully. This patch addresses the allocations in the raw-win32 block driver. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
2014-06-04block/raw-win32: implement .bdrv_detach/attach_aio_context()Stefan Hajnoczi1-4/+17
Drop the assumption that we're using the main AioContext for raw-win32. Convert the aio-win32 code to support detach/attach and replace qemu_aio_wait() with aio_poll(). The .bdrv_detach/attach_aio_context() interfaces move the aio-win32 event notifier from the old to the new AioContext. Cc: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2014-06-04block/raw-win32: create one QEMUWin32AIOState per BDRVRawStateStefan Hajnoczi1-0/+8
Each QEMUWin32AIOState event notifier is associated with an AioContext. Since BlockDriverState instances can use different AioContexts we cannot continue to use a global QEMUWin32AIOState. Let each BDRVRawState have its own QEMUWin32AIOState and free it when BDRVRawState is closed. Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-08-22win32-aio: drop win32_aio_flush_cb()Stefan Hajnoczi1-9/+1
The io_flush argument to qemu_aio_set_event_notifier() has been removed since the block layer learnt to drain requests by itself. Fix the Windows build for win32-aio.o by updating the qemu_aio_set_event_notifier() call and dropping win32_aio_flush_cb(). Reviewed-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-05-18Remove twice include of qemu-common.hQiao Nuohan1-1/+0
This patch is used to remove twice include of "qemu-common.h" in block/win32-aio.c Signed-off-by: Qiao Nuohan <qiaonuohan@cn.fujitsu.com> Reviewed-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2013-01-18win32-aio: use iov utility functions instead of open-coding themMichael Tokarev1-14/+3
We have iov_from_buf() and iov_to_buf(), use them instead of open-coding these in block/win32-aio.c Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-01-17win32-aio: Fix memory leakKevin Wolf1-1/+1
The buffer is allocated for both reads and writes, and obviously it should be freed even if an error occurs. Cc: qemu-stable@nongnu.org Signed-off-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-01-17win32-aio: Fix vectored readsKevin Wolf1-1/+1
Copying data in the right direction really helps a lot! Cc: qemu-stable@nongnu.org Signed-off-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-01-15win32-aio: Fix how win32_aio_process_completion() frees bufferMarkus Armbruster1-1/+1
win32_aio_submit() allocates it with qemu_blockalign(), therefore it must be freed with qemu_vfree(), not g_free(). Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2012-12-19misc: move include files to include/qemu/Paolo Bonzini1-3/+3
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-12-19block: move include files to include/block/Paolo Bonzini1-2/+2
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-11-14aio: rename AIOPool to AIOCBInfoStefan Hajnoczi1-2/+2
Now that AIOPool no longer keeps a freelist, it isn't really a "pool" anymore. Rename it to AIOCBInfo and make it const since it no longer needs to be modified. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-11-14block: Workaround for older versions of MinGW gccStefan Weil1-5/+5
Versions before gcc-4.6 don't support unnamed fields in initializers (see http://gcc.gnu.org/bugzilla/show_bug.cgi?id=10676). Offset and OffsetHigh belong to an unnamed struct which is part of an unnamed union. Therefore the original code does not work with older versions of gcc. Signed-off-by: Stefan Weil <sw@weilnetz.de> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2012-10-31raw-win32: implement native asynchronous I/OPaolo Bonzini1-0/+226
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 the I/O synchronously on regular files. (!) But it works, and it is good to keep the Win32 and POSIX ports as similar as possible. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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