check_code
err = check_code(le64toh(sh->sh_addr),
return check_code(operation->draining, operation, "drain operation", waiter);
return check_code(operation->loading, operation, "load operation", waiter);
return check_code(operation == VDO_ADMIN_STATE_RESUMING, operation,
return (check_code(operation->operating, operation, "operation", waiter) ?