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block: Convert bdrv_io_unplug() to co_wrapper

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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>
This commit is contained in:
Emanuele Giuseppe Esposito 2023-01-13 21:42:01 +01:00 • committed by Kevin Wolf
parent 8f49745432
commit 09d9fc97f8
8 changed files with 20 additions and 19 deletions
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10
block/file-posix.c
View file

@ -2149,7 +2149,7 @@ static void coroutine_fn raw_co_io_plug(BlockDriverState *bs)
#endif
}
static void raw_aio_unplug(BlockDriverState *bs)
static void coroutine_fn raw_co_io_unplug(BlockDriverState *bs)
{
BDRVRawState __attribute__((unused)) *s = bs->opaque;
#ifdef CONFIG_LINUX_AIO
@ -3318,7 +3318,7 @@ BlockDriver bdrv_file = {
.bdrv_co_copy_range_to = raw_co_copy_range_to,
.bdrv_refresh_limits = raw_refresh_limits,
.bdrv_co_io_plug = raw_co_io_plug,
.bdrv_io_unplug = raw_aio_unplug,
.bdrv_co_io_unplug = raw_co_io_unplug,
.bdrv_attach_aio_context = raw_aio_attach_aio_context,
.bdrv_co_truncate = raw_co_truncate,
@ -3690,7 +3690,7 @@ static BlockDriver bdrv_host_device = {
.bdrv_co_copy_range_to = raw_co_copy_range_to,
.bdrv_refresh_limits = raw_refresh_limits,
.bdrv_co_io_plug = raw_co_io_plug,
.bdrv_io_unplug = raw_aio_unplug,
.bdrv_co_io_unplug = raw_co_io_unplug,
.bdrv_attach_aio_context = raw_aio_attach_aio_context,
.bdrv_co_truncate = raw_co_truncate,
@ -3814,7 +3814,7 @@ static BlockDriver bdrv_host_cdrom = {
.bdrv_co_flush_to_disk = raw_co_flush_to_disk,
.bdrv_refresh_limits = raw_refresh_limits,
.bdrv_co_io_plug = raw_co_io_plug,
.bdrv_io_unplug = raw_aio_unplug,
.bdrv_co_io_unplug = raw_co_io_unplug,
.bdrv_attach_aio_context = raw_aio_attach_aio_context,
.bdrv_co_truncate = raw_co_truncate,
@ -3944,7 +3944,7 @@ static BlockDriver bdrv_host_cdrom = {
.bdrv_co_flush_to_disk = raw_co_flush_to_disk,
.bdrv_refresh_limits = raw_refresh_limits,
.bdrv_co_io_plug = raw_co_io_plug,
.bdrv_io_unplug = raw_aio_unplug,
.bdrv_co_io_unplug = raw_co_io_unplug,
.bdrv_attach_aio_context = raw_aio_attach_aio_context,
.bdrv_co_truncate = raw_co_truncate,