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raw: Support BDRV_REQ_FUA

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Pass through the FUA flag to the lower layer so that the separate flush
can be saved in practically relevant cases where a (raw) format driver
sits on top of the protocol driver.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Kevin Wolf 2016-03-10 13:46:04 +01:00
parent 2b556518c3
commit 5481531154
1 changed files with 14 additions and 3 deletions
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17
block/raw_bsd.c
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@ -57,8 +57,9 @@ static int coroutine_fn raw_co_readv(BlockDriverState *bs, int64_t sector_num,
return bdrv_co_readv(bs->file->bs, sector_num, nb_sectors, qiov); return bdrv_co_readv(bs->file->bs, sector_num, nb_sectors, qiov);
} }
static int coroutine_fn raw_co_writev(BlockDriverState *bs, int64_t sector_num, static int coroutine_fn
int nb_sectors, QEMUIOVector *qiov) raw_co_writev_flags(BlockDriverState *bs, int64_t sector_num, int nb_sectors,
QEMUIOVector *qiov, int flags)
{ {
void *buf = NULL; void *buf = NULL;
BlockDriver *drv; BlockDriver *drv;
@ -104,7 +105,8 @@ static int coroutine_fn raw_co_writev(BlockDriverState *bs, int64_t sector_num,
} }
BLKDBG_EVENT(bs->file, BLKDBG_WRITE_AIO); BLKDBG_EVENT(bs->file, BLKDBG_WRITE_AIO);
ret = bdrv_co_writev(bs->file->bs, sector_num, nb_sectors, qiov); ret = bdrv_co_do_pwritev(bs->file->bs, sector_num * BDRV_SECTOR_SIZE,
nb_sectors * BDRV_SECTOR_SIZE, qiov, flags);
fail: fail:
if (qiov == &local_qiov) { if (qiov == &local_qiov) {
@ -114,6 +116,13 @@ fail:
return ret; return ret;
} }
static int coroutine_fn
raw_co_writev(BlockDriverState *bs, int64_t sector_num, int nb_sectors,
QEMUIOVector *qiov)
{
return raw_co_writev_flags(bs, sector_num, nb_sectors, qiov, 0);
}
static int64_t coroutine_fn raw_co_get_block_status(BlockDriverState *bs, static int64_t coroutine_fn raw_co_get_block_status(BlockDriverState *bs,
int64_t sector_num, int64_t sector_num,
int nb_sectors, int *pnum, int nb_sectors, int *pnum,
@ -248,6 +257,8 @@ BlockDriver bdrv_raw = {
.bdrv_create = &raw_create, .bdrv_create = &raw_create,
.bdrv_co_readv = &raw_co_readv, .bdrv_co_readv = &raw_co_readv,
.bdrv_co_writev = &raw_co_writev, .bdrv_co_writev = &raw_co_writev,
.bdrv_co_writev_flags = &raw_co_writev_flags,
.supported_write_flags = BDRV_REQ_FUA,
.bdrv_co_write_zeroes = &raw_co_write_zeroes, .bdrv_co_write_zeroes = &raw_co_write_zeroes,
.bdrv_co_discard = &raw_co_discard, .bdrv_co_discard = &raw_co_discard,
.bdrv_co_get_block_status = &raw_co_get_block_status, .bdrv_co_get_block_status = &raw_co_get_block_status,