Function del_route_mpath

freebsd/net/route/mpath_ctl.c:163–189

* Tries to delete matching paths from @nhg. * Returns 0 on success and updates operation result in @rc. */

 * Returns 0 on success and updates operation result in @rc.
 */
int
del_route_mpath(struct rib_head *rh, struct rt_addrinfo *info,
    struct rtentry *rt, struct nhgrp_object *nhg,
    struct rib_cmd_info *rc)
{
	struct route_nhop_data rnd;
	struct rt_match_info ri = { .info = info, .rt = rt };
	int error;

	RIB_WLOCK_ASSERT(rh);

	/*
	 * Require gateway to delete multipath routes, to forbid
	 *  deleting all paths at once.
	 * If the filter function is provided, skip gateway check to
	 *  allow rib_walk_del() delete routes for any criteria based
	 *  on provided callback.
	 */
	if ((info->rti_info[RTAX_GATEWAY] == NULL) && (info->rti_filter == NULL))
		return (ESRCH);

	error = nhgrp_get_filtered_group(rh, nhg, gw_filter_func, (void *)&ri,
	    &rnd);
	if (error == 0)
		error = change_route_nhop(rh, rt, info, &rnd, rc);
	return (error);
}