-static void close_unused_images(BlockDriverState *top, BlockDriverState *base,
- const char *base_id)
-{
- BlockDriverState *intermediate;
- intermediate = top->backing_hd;
-
- /* Must assign before bdrv_delete() to prevent traversing dangling pointer
- * while we delete backing image instances.
- */
- bdrv_set_backing_hd(top, base);
-
- while (intermediate) {
- BlockDriverState *unused;
-
- /* reached base */
- if (intermediate == base) {
- break;
- }
-
- unused = intermediate;
- intermediate = intermediate->backing_hd;
- bdrv_set_backing_hd(unused, NULL);
- bdrv_unref(unused);
- }
-
- bdrv_refresh_limits(top, NULL);
-}
-