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authorKevin Wolf <kwolf@redhat.com>2016-06-03 17:36:27 +0200
committerKevin Wolf <kwolf@redhat.com>2016-06-16 15:19:55 +0200
commit9d52aa3c38484703c05e791bac1ff588588a217c (patch)
treef3936cee7f30b44a358085479958b3b1d525293e /block/raw-aio.h
parent2174f12bdeb3974141784e14bbb7ad8c53178cd9 (diff)
raw-posix: Implement .bdrv_co_preadv/pwritev
The raw-posix block driver actually supports byte-aligned requests now on non-O_DIRECT images, like it already (and previously incorrectly) claimed in bs->request_alignment. For some block drivers this means that a RMW cycle can be avoided when they write sub-sector metadata e.g. for cluster allocation. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'block/raw-aio.h')
-rw-r--r--block/raw-aio.h3
1 files changed, 1 insertions, 2 deletions
diff --git a/block/raw-aio.h b/block/raw-aio.h
index 03bbfba565..a4cdbbf1b7 100644
--- a/block/raw-aio.h
+++ b/block/raw-aio.h
@@ -40,8 +40,7 @@ typedef struct LinuxAioState LinuxAioState;
LinuxAioState *laio_init(void);
void laio_cleanup(LinuxAioState *s);
int coroutine_fn laio_co_submit(BlockDriverState *bs, LinuxAioState *s, int fd,
- int64_t sector_num, QEMUIOVector *qiov,
- int nb_sectors, int type);
+ uint64_t offset, QEMUIOVector *qiov, int type);
BlockAIOCB *laio_submit(BlockDriverState *bs, LinuxAioState *s, int fd,
int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
BlockCompletionFunc *cb, void *opaque, int type);