block: Convert bdrv_io_unplug() to co_wrapper
commit09d9fc97f8b0bf30f3c55a5ae3a20f799fd3e5f2
authorEmanuele Giuseppe Esposito <eesposit@redhat.com>
Fri, 13 Jan 2023 20:42:01 +0000 (13 21:42 +0100)
committerKevin Wolf <kwolf@redhat.com>
Wed, 1 Feb 2023 15:52:32 +0000 (1 16:52 +0100)
treeeb670ff964eaccb9bf8556c943f89d17e731c74d
parent8f4974543203bd1e3a77f198ebb2c60d177b1c40
block: Convert bdrv_io_unplug() to co_wrapper

BlockDriver->bdrv_io_unplug is categorized as IO callback, and it
currently doesn't run in a coroutine. We should let it take a graph
rdlock since the callback traverses the block nodes graph, which however
is only possible in a coroutine.

The only caller of this function is blk_io_unplug(), therefore make
blk_io_unplug() a co_wrapper, so that we're always running in a
coroutine where the lock can be taken.

Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20230113204212.359076-4-kwolf@redhat.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
block/blkio.c
block/block-backend.c
block/file-posix.c
block/io.c
block/nvme.c
include/block/block-io.h
include/block/block_int-common.h
include/sysemu/block-backend-io.h