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block: Mark bdrv_cow_child() and callers GRAPH_RDLOCK

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This adds GRAPH_RDLOCK annotations to declare that callers of
bdrv_cow_child() need to hold a reader lock for the graph because it
accesses bs->backing.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-ID: <20231027155333.420094-13-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 2023-10-27 17:53:21 +02:00
parent ec82cc41a7
commit 78a9c76eef
3 changed files with 12 additions and 6 deletions
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2
block/stream.c
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@ -90,7 +90,7 @@ static int stream_prepare(Job *job)
unfiltered_base = bdrv_skip_filters(base);
bdrv_graph_rdunlock_main_loop();
if (bdrv_cow_child(unfiltered_bs)) {
if (unfiltered_bs_cow) {
const char *base_id = NULL, *base_fmt = NULL;
if (unfiltered_base) {
base_id = s->backing_file_str ?: unfiltered_base->filename;