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block: Mark bdrv_refresh_filename() and callers GRAPH_RDLOCK

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This adds GRAPH_RDLOCK annotations to declare that callers of
bdrv_refresh_filename() need to hold a reader lock for the graph
because it accesses the children list of a node.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-ID: <20230929145157.45443-11-kwolf@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Kevin Wolf 2023-09-29 16:51:45 +02:00
parent 15f3f1fe57
commit b7cfc7d58e
12 changed files with 101 additions and 47 deletions
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11
block/qapi.c
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@ -225,9 +225,8 @@ int bdrv_query_snapshot_info_list(BlockDriverState *bs,
* Helper function for other query info functions. Store information about @bs
* in @info, setting @errp on error.
*/
static void bdrv_do_query_node_info(BlockDriverState *bs,
BlockNodeInfo *info,
Error **errp)
static void GRAPH_RDLOCK
bdrv_do_query_node_info(BlockDriverState *bs, BlockNodeInfo *info, Error **errp)
{
int64_t size;
const char *backing_filename;
@ -423,8 +422,8 @@ fail:
}
/* @p_info will be set only on success. */
static void bdrv_query_info(BlockBackend *blk, BlockInfo **p_info,
Error **errp)
static void GRAPH_RDLOCK
bdrv_query_info(BlockBackend *blk, BlockInfo **p_info, Error **errp)
{
BlockInfo *info = g_malloc0(sizeof(*info));
BlockDriverState *bs = blk_bs(blk);
@ -672,6 +671,8 @@ BlockInfoList *qmp_query_block(Error **errp)
BlockBackend *blk;
Error *local_err = NULL;
GRAPH_RDLOCK_GUARD_MAINLOOP();
for (blk = blk_all_next(NULL); blk; blk = blk_all_next(blk)) {
BlockInfoList *info;