[PATCH 4/6] block/dirty-bitmap: assert that BlockDriver->bdrv_co_*_dirty_bitmap are always called with graph rdlock taken

[Emanuele Giuseppe Esposito <eesposit@redhat.com>]

The only callers are the respective bdrv_*_dirty_bitmap() functions that
take care of creating a new coroutine (that already takes the graph
rdlock).

Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
---
 block/dirty-bitmap.c             | 2 ++
 include/block/block_int-common.h | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/block/dirty-bitmap.c b/block/dirty-bitmap.c
index 21cf592889..92c70a7282 100644
--- a/block/dirty-bitmap.c
+++ b/block/dirty-bitmap.c
@@ -392,6 +392,7 @@ int coroutine_fn
 bdrv_co_remove_persistent_dirty_bitmap(BlockDriverState *bs, const char *name,
                                        Error **errp)
 {
+    assert_bdrv_graph_readable();
     if (bs->drv && bs->drv->bdrv_co_remove_persistent_dirty_bitmap) {
         return bs->drv->bdrv_co_remove_persistent_dirty_bitmap(bs, name, errp);
     }
@@ -413,6 +414,7 @@ bdrv_co_can_store_new_dirty_bitmap(BlockDriverState *bs, const char *name,
                                    uint32_t granularity, Error **errp)
 {
     BlockDriver *drv = bs->drv;
+    assert_bdrv_graph_readable();
 
     if (!drv) {
         error_setg_errno(errp, ENOMEDIUM,
diff --git a/include/block/block_int-common.h b/include/block/block_int-common.h
index 9e441cb93b..3064822508 100644
--- a/include/block/block_int-common.h
+++ b/include/block/block_int-common.h
@@ -789,9 +789,11 @@ struct BlockDriver {
     void (*bdrv_drain_end)(BlockDriverState *bs);
 
     bool (*bdrv_supports_persistent_dirty_bitmap)(BlockDriverState *bs);
+    /* Called with graph rdlock held. */
     bool coroutine_fn (*bdrv_co_can_store_new_dirty_bitmap)(
         BlockDriverState *bs, const char *name, uint32_t granularity,
         Error **errp);
+    /* Called with graph rdlock held. */
     int coroutine_fn (*bdrv_co_remove_persistent_dirty_bitmap)(
         BlockDriverState *bs, const char *name, Error **errp);
 };
-- 
2.31.1