+static surf_action_t ws_action_get_size(void *workstation, surf_file_t stream)
+{
+ storage_t st = find_storage_on_mount_list(workstation, stream->storage);
+ XBT_DEBUG("GET SIZE on disk '%s'",st->generic_resource.name);
+ surf_model_t model = st->generic_resource.model;
+ return model->extension.storage.get_size(st, stream);
+}
+