FOR_EACH_DISK_STORAGE_COLUMN(i, t, cd) {
char *dirname = column_filename(t, i);
ret = for_each_file_in_dir(dirname, prune_disk_storage_file, &t->desc->flags);
FOR_EACH_DISK_STORAGE_COLUMN(i, t, cd) {
char *dirname = column_filename(t, i);
ret = for_each_file_in_dir(dirname, prune_disk_storage_file, &t->desc->flags);