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block: Convert bdrv_get_info() to co_wrapper_mixed

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bdrv_get_info() is categorized as an I/O function, and it currently
doesn't run in a coroutine. We should let it take a graph rdlock since
it traverses the block nodes graph, which however is only possible in a
coroutine.

Therefore turn it into a co_wrapper to move the actual function into 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: <20230113204212.359076-11-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 21:42:08 +01:00 • committed by Kevin Wolf
parent 82618d7bc3
commit 3d47eb0a2a
18 changed files with 59 additions and 43 deletions
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5
block/qcow.c
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@ -1129,7 +1129,8 @@ fail:
return ret;
}
static int qcow_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
static int coroutine_fn
qcow_co_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
{
BDRVQcowState *s = bs->opaque;
bdi->cluster_size = s->cluster_size;
@ -1198,7 +1199,7 @@ static BlockDriver bdrv_qcow = {
.bdrv_make_empty = qcow_make_empty,
.bdrv_co_pwritev_compressed = qcow_co_pwritev_compressed,
.bdrv_get_info = qcow_get_info,
.bdrv_co_get_info = qcow_co_get_info,
.create_opts = &qcow_create_opts,
.strong_runtime_opts = qcow_strong_runtime_opts,