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-rw-r--r--block/block-backend.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/block/block-backend.c b/block/block-backend.c
index deb55c272e..6140d133e2 100644
--- a/block/block-backend.c
+++ b/block/block-backend.c
@@ -870,6 +870,14 @@ int blk_insert_bs(BlockBackend *blk, BlockDriverState *bs, Error **errp)
 }
 
 /*
+ * Change BlockDriverState associated with @blk.
+ */
+int blk_replace_bs(BlockBackend *blk, BlockDriverState *new_bs, Error **errp)
+{
+    return bdrv_replace_child_bs(blk->root, new_bs, errp);
+}
+
+/*
  * Sets the permission bitmasks that the user of the BlockBackend needs.
  */
 int blk_set_perm(BlockBackend *blk, uint64_t perm, uint64_t shared_perm,