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 /block/vhdx.c | |
| parent | 0e01b76e7cc43068f6b8cc05297f61539ccd5279 (diff) | |
| download | qemu-8341f00dc207b80a1b2e7c7784890c9b0446d062.tar.gz | |
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 'block/vhdx.c')
| -rw-r--r-- | block/vhdx.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/block/vhdx.c b/block/vhdx.c index 2b7b332404..ec778fe2a7 100644 --- a/block/vhdx.c +++ b/block/vhdx.c @@ -1856,13 +1856,14 @@ static int vhdx_create(const char *filename, QemuOpts *opts, Error **errp) creator = g_utf8_to_utf16("QEMU v" QEMU_VERSION, -1, NULL, &creator_items, NULL); signature = cpu_to_le64(VHDX_FILE_SIGNATURE); - ret = blk_pwrite(blk, VHDX_FILE_ID_OFFSET, &signature, sizeof(signature)); + ret = blk_pwrite(blk, VHDX_FILE_ID_OFFSET, &signature, sizeof(signature), + 0); if (ret < 0) { goto delete_and_exit; } if (creator) { ret = blk_pwrite(blk, VHDX_FILE_ID_OFFSET + sizeof(signature), - creator, creator_items * sizeof(gunichar2)); + creator, creator_items * sizeof(gunichar2), 0); if (ret < 0) { goto delete_and_exit; } |