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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
2023-10-27 17:53:12 +02:00
parent 067179868e
commit f5a3a270fe
5 changed files with 16 additions and 4 deletions
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4
migration/block-dirty-bitmap.c
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@@ -607,6 +607,10 @@ static int init_dirty_bitmap_migration(DBMSaveState *s)
BlockBackend *blk;
GHashTable *alias_map = NULL;
/* Runs in the migration thread, but holds the iothread lock */
GLOBAL_STATE_CODE();
GRAPH_RDLOCK_GUARD_MAINLOOP();
if (migrate_has_block_bitmap_mapping()) {
alias_map = construct_alias_map(migrate_block_bitmap_mapping(), true,
&error_abort);