diff options
| author | Kevin Wolf <kwolf@redhat.com> | 2016-03-10 13:39:55 +0100 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2016-03-30 12:16:02 +0200 |
| commit | 93f5e6d88a452799b907954b90cf49abee8f7ea4 (patch) | |
| tree | 02ee3185ed3250aef9ebfc839cc2a729960d5bb3 /block | |
| parent | c83f9fba2a4ae3f07a7ac8ff8c021f539a08b6ce (diff) | |
| download | qemu-93f5e6d88a452799b907954b90cf49abee8f7ea4.tar.gz | |
block: Introduce bdrv_co_writev_flags()
This function will allow drivers to implement BDRV_REQ_FUA natively
instead of sending a separate flush after the write.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Diffstat (limited to 'block')
| -rw-r--r-- | block/io.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/block/io.c b/block/io.c index 939e4f1559..c4869b96c5 100644 --- a/block/io.c +++ b/block/io.c @@ -1154,13 +1154,20 @@ static int coroutine_fn bdrv_aligned_pwritev(BlockDriverState *bs, } else if (flags & BDRV_REQ_ZERO_WRITE) { bdrv_debug_event(bs, BLKDBG_PWRITEV_ZERO); ret = bdrv_co_do_write_zeroes(bs, sector_num, nb_sectors, flags); + } else if (drv->bdrv_co_writev_flags) { + bdrv_debug_event(bs, BLKDBG_PWRITEV); + ret = drv->bdrv_co_writev_flags(bs, sector_num, nb_sectors, qiov, + flags); } else { + assert(drv->supported_write_flags == 0); bdrv_debug_event(bs, BLKDBG_PWRITEV); ret = drv->bdrv_co_writev(bs, sector_num, nb_sectors, qiov); } bdrv_debug_event(bs, BLKDBG_PWRITEV_DONE); - if (ret == 0 && (flags & BDRV_REQ_FUA)) { + if (ret == 0 && (flags & BDRV_REQ_FUA) && + !(drv->supported_write_flags & BDRV_REQ_FUA)) + { ret = bdrv_co_flush(bs); } |