Function ifc_alloc_unit_specific

freebsd/net/if_clone.c:608–628

}

static int
ifc_alloc_unit_specific(struct if_clone *ifc, int *unit)
{
	char name[IFNAMSIZ];

	if (*unit > ifc->ifc_maxunit)
		return (ENOSPC);

	if (alloc_unr_specific(ifc->ifc_unrhdr, *unit) == -1)
		return (EEXIST);

	snprintf(name, IFNAMSIZ, "%s%d", ifc->ifc_name, *unit);
	if (ifunit(name) != NULL) {
		free_unr(ifc->ifc_unrhdr, *unit);
		return (EEXIST);
	}

	IF_CLONE_ADDREF(ifc);

	return (0);
}

static int
ifc_alloc_unit_next(struct if_clone *ifc, int *unit)