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block: Mark bdrv_filter_bs() and callers GRAPH_RDLOCK

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This adds GRAPH_RDLOCK annotations to declare that callers of
bdrv_filter_bs() need to hold a reader lock for the graph because
it calls bdrv_filter_child(), which accesses bs->file/backing.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-ID: <20231027155333.420094-4-kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Kevin Wolf committed 2023-11-07 19:14:19 +01:00
1 parent 067179868e
commit f5a3a270fe
5 files changed
+16 -4
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include/block/block_int-io.h
+2 -1
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@@ -143,7 +143,8 @@ static inline BlockDriverState *bdrv_cow_bs(BlockDriverState *bs)
return child_bs(bdrv_cow_child(bs));
}
static inline BlockDriverState *bdrv_filter_bs(BlockDriverState *bs)
static inline BlockDriverState * GRAPH_RDLOCK
bdrv_filter_bs(BlockDriverState *bs)
{
IO_CODE();
return child_bs(bdrv_filter_child(bs));