1 files changed, 15 insertions, 0 deletions
diff --git a/block/snapshot.c b/block/snapshot.c
index 75d0b968f6..6e9fa8da98 100644
--- a/block/snapshot.c
+++ b/block/snapshot.c
@@ -469,3 +469,18 @@ int bdrv_all_create_snapshot(QEMUSnapshotInfo *sn,
     *first_bad_bs = bs;
     return err;
 }
+
+BlockDriverState *bdrv_all_find_vmstate_bs(void)
+{
+    bool not_found = true;
+    BlockDriverState *bs = NULL;
+
+    while (not_found && (bs = bdrv_next(bs))) {
+        AioContext *ctx = bdrv_get_aio_context(bs);
+
+        aio_context_acquire(ctx);
+        not_found = !bdrv_can_snapshot(bs);
+        aio_context_release(ctx);
+    }
+    return bs;
+}