aboutsummaryrefslogtreecommitdiff
path: root/nbd
diff options
context:
space:
mode:
authorEric Blake <eblake@redhat.com>2016-05-06 10:26:27 -0600
committerKevin Wolf <kwolf@redhat.com>2016-05-12 15:22:08 +0200
commit8341f00dc207b80a1b2e7c7784890c9b0446d062 (patch)
treee2ff324dc93b8b03a5dff95e6fd576116591aad3 /nbd
parent0e01b76e7cc43068f6b8cc05297f61539ccd5279 (diff)
downloadqemu-8341f00dc207b80a1b2e7c7784890c9b0446d062.zip
qemu-8341f00dc207b80a1b2e7c7784890c9b0446d062.tar.gz
qemu-8341f00dc207b80a1b2e7c7784890c9b0446d062.tar.bz2
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 'nbd')
-rw-r--r--nbd/server.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/nbd/server.c b/nbd/server.c
index 2184c64..fa862cd 100644
--- a/nbd/server.c
+++ b/nbd/server.c
@@ -1115,7 +1115,7 @@ static void nbd_trip(void *opaque)
TRACE("Writing to device");
ret = blk_pwrite(exp->blk, request.from + exp->dev_offset,
- req->data, request.len);
+ req->data, request.len, 0);
if (ret < 0) {
LOG("writing to file failed");
reply.error = -ret;