Eric Blake 8341f00dc2 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>

2016-05-12 15:22:08 +02:00

..

client.c

nbd: Don't fail handshake on NBD_OPT_LIST descriptions

2016-04-15 17:56:56 +02:00

common.c

nbd: do not hang nbd_wr_syncv if outside a coroutine and no available data

2016-04-08 00:07:44 +02:00

Makefile.objs

nbd: Split nbd.c

2016-01-15 18:58:02 +01:00

nbd-internal.h

nbd: Avoid bitrot in TRACE() usage

2016-04-08 00:07:43 +02:00

server.c

block: Allow BDRV_REQ_FUA through blk_pwrite()

2016-05-12 15:22:08 +02:00