diff --git a/block/block-backend.c b/block/block-backend.c
index 7f5ad59858..ebdf78a11c 100644
--- a/block/block-backend.c
+++ b/block/block-backend.c
@@ -223,6 +223,21 @@ void blk_unref(BlockBackend *blk)
     }
 }
 
+void blk_remove_all_bs(void)
+{
+    BlockBackend *blk;
+
+    QTAILQ_FOREACH(blk, &blk_backends, link) {
+        AioContext *ctx = blk_get_aio_context(blk);
+
+        aio_context_acquire(ctx);
+        if (blk->bs) {
+            blk_remove_bs(blk);
+        }
+        aio_context_release(ctx);
+    }
+}
+
 /*
  * Return the BlockBackend after @blk.
  * If @blk is null, return the first one.
diff --git a/include/sysemu/block-backend.h b/include/sysemu/block-backend.h
index ae4efb4138..ec303316bb 100644
--- a/include/sysemu/block-backend.h
+++ b/include/sysemu/block-backend.h
@@ -68,6 +68,7 @@ BlockBackend *blk_new_open(const char *name, const char *filename,
 int blk_get_refcnt(BlockBackend *blk);
 void blk_ref(BlockBackend *blk);
 void blk_unref(BlockBackend *blk);
+void blk_remove_all_bs(void);
 const char *blk_name(BlockBackend *blk);
 BlockBackend *blk_by_name(const char *name);
 BlockBackend *blk_next(BlockBackend *blk);