Function tmproutes_update

freebsd/net/route/route_temporal.c:125–147

* Function responsible for updating the time of the next calllout * w.r.t. new temporal routes insertion. * * Called by the routing code upon adding new temporal route * to the tree. RIB_WLOCK must be held. */

 * to the tree. RIB_WLOCK must be held.
 */
void
tmproutes_update(struct rib_head *rnh, struct rtentry *rt)
{
	int seconds;

	RIB_WLOCK_ASSERT(rnh);

	if (rnh->next_expire == 0 || rnh->next_expire > rt->rt_expire) {
		/*
		 * Callback is not scheduled, is executing,
		 * or is scheduled for a later time than we need.
		 *
		 * Schedule the one for the current @rt expiration time.
		 */
		seconds = (rt->rt_expire - time_uptime);
		if (seconds < 0)
			seconds = 0;
		callout_reset_sbt(&rnh->expire_callout, SBT_1S * seconds,
		    SBT_1MS * 500, expire_callout, rnh, 0);

		rnh->next_expire = rt->rt_expire;
	}
}

void
tmproutes_init(struct rib_head *rh)