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block: Mark bdrv_chain_contains() and callers GRAPH_RDLOCK

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

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-ID: <20231027155333.420094-11-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 17:53:19 +02:00
parent 9275fc72bd
commit 79bb762727
4 changed files with 32 additions and 23 deletions
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2
block/block-copy.c
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@ -399,7 +399,9 @@ BlockCopyState *block_copy_state_new(BdrvChild *source, BdrvChild *target,
* For more information see commit f8d59dfb40bb and test
* tests/qemu-iotests/222
*/
bdrv_graph_rdlock_main_loop();
is_fleecing = bdrv_chain_contains(target->bs, source->bs);
bdrv_graph_rdunlock_main_loop();
s = g_new(BlockCopyState, 1);
*s = (BlockCopyState) {