vdi: Make block_status recurse for fixed images

Suggested-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Fixes: 69f4750
Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-id: 20190725155512.9827-2-mreitz@redhat.com
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>

block/vdi.c

@@ -542,7 +542,8 @@ static int coroutine_fn vdi_co_block_status(BlockDriverState *bs,
     *map = s->header.offset_data + (uint64_t)bmap_entry * s->block_size +
         index_in_block;
     *file = bs->file->bs;
-    return BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID;
+    return BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID |
+        (s->header.image_type == VDI_TYPE_STATIC ? BDRV_BLOCK_RECURSE : 0);
 }
 
 static int coroutine_fn