block: Mark bdrv_co_get_info() and callers GRAPH_RDLOCK

This adds GRAPH_RDLOCK annotations to declare that callers of
bdrv_co_get_info() need to hold a reader lock for the graph.

Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20230504115750.54437-15-kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

1 files changed, 5 insertions, 6 deletions

diff --git a/block/io.c b/block/io.c
index 6fa1993..3bf9ef9 100644
--- a/block/io.c
+++ b/block/io.c
@@ -727,10 +727,9 @@ BdrvTrackedRequest *coroutine_fn bdrv_co_get_self_request(BlockDriverState *bs)
 /**
  * Round a region to cluster boundaries
  */
-void coroutine_fn bdrv_round_to_clusters(BlockDriverState *bs,
-                            int64_t offset, int64_t bytes,
-                            int64_t *cluster_offset,
-                            int64_t *cluster_bytes)
+void coroutine_fn GRAPH_RDLOCK
+bdrv_round_to_clusters(BlockDriverState *bs, int64_t offset, int64_t bytes,
+                       int64_t *cluster_offset, int64_t *cluster_bytes)
 {
     BlockDriverInfo bdi;
     IO_CODE();
@@ -744,7 +743,7 @@ void coroutine_fn bdrv_round_to_clusters(BlockDriverState *bs,
     }
 }
 
-static coroutine_fn int bdrv_get_cluster_size(BlockDriverState *bs)
+static int coroutine_fn GRAPH_RDLOCK bdrv_get_cluster_size(BlockDriverState *bs)
 {
     BlockDriverInfo bdi;
     int ret;
@@ -1800,7 +1799,7 @@ fail:
     return ret;
 }
 
-static inline int coroutine_fn
+static inline int coroutine_fn GRAPH_RDLOCK
 bdrv_co_write_req_prepare(BdrvChild *child, int64_t offset, int64_t bytes,
                           BdrvTrackedRequest *req, int flags)
 {