diff options
| author | Eric Blake <eblake@redhat.com> | 2016-05-06 10:26:27 -0600 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2016-05-12 15:22:08 +0200 |
| commit | 8341f00dc207b80a1b2e7c7784890c9b0446d062 (patch) | |
| tree | e2ff324dc93b8b03a5dff95e6fd576116591aad3 /qemu-io-cmds.c | |
| parent | 0e01b76e7cc43068f6b8cc05297f61539ccd5279 (diff) | |
block: Allow BDRV_REQ_FUA through blk_pwrite()
We have several block drivers that understand BDRV_REQ_FUA,
and emulate it in the block layer for the rest by a full flush.
But without a way to actually request BDRV_REQ_FUA during a
pass-through blk_pwrite(), FUA-aware block drivers like NBD are
forced to repeat the emulation logic of a full flush regardless
of whether the backend they are writing to could do it more
efficiently.
This patch just wires up a flags argument; followup patches
will actually make use of it in the NBD driver and in qemu-io.
Signed-off-by: Eric Blake <eblake@redhat.com>
Acked-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'qemu-io-cmds.c')
| -rw-r--r-- | qemu-io-cmds.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/qemu-io-cmds.c b/qemu-io-cmds.c index 41580b5247..ee0c5d7a55 100644 --- a/qemu-io-cmds.c +++ b/qemu-io-cmds.c @@ -474,7 +474,7 @@ static int do_pwrite(BlockBackend *blk, char *buf, int64_t offset, return -ERANGE; } - *total = blk_pwrite(blk, offset, (uint8_t *)buf, count); + *total = blk_pwrite(blk, offset, (uint8_t *)buf, count, 0); if (*total < 0) { return *total; } |