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Commit df67e6c9 authored by David S. Miller's avatar David S. Miller
Browse files

ipv4: Remove unnecessary code from rt_check_expire(). 



IPv4 routing cache entries no longer use dst->expires, because the
metrics, PMTU, and redirect information are stored in the inetpeer
cache.

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 29cb99de

net/ipv4/route.c

+11 −23
Original line number Diff line number Diff line
@@ -870,34 +870,22 @@ static void rt_check_expire(void) 
		while ((rth = rcu_dereference_protected(*rthp,

					lockdep_is_held(rt_hash_lock_addr(i)))) != NULL) {

			prefetch(rth->dst.rt_next);

			if (rt_is_expired(rth)) {

			if (rt_is_expired(rth) ||

			    rt_may_expire(rth, tmo, ip_rt_gc_timeout)) {

				*rthp = rth->dst.rt_next;

				rt_free(rth);

				continue;

			}

			if (rth->dst.expires) {

				/* Entry is expired even if it is in use */

				if (time_before_eq(jiffies, rth->dst.expires)) {

nofree:



			/* We only count entries on a chain with equal

			 * hash inputs once so that entries for

			 * different QOS levels, and other non-hash

			 * input attributes don't unfairly skew the

			 * length computation

			 */

			tmo >>= 1;

			rthp = &rth->dst.rt_next;

					/*

					 * We only count entries on

					 * a chain with equal hash inputs once

					 * so that entries for different QOS

					 * levels, and other non-hash input

					 * attributes don't unfairly skew

					 * the length computation

					 */

			length += has_noalias(rt_hash_table[i].chain, rth);

					continue;

				}

			} else if (!rt_may_expire(rth, tmo, ip_rt_gc_timeout))

				goto nofree;



			/* Cleanup aged off entries. */

			*rthp = rth->dst.rt_next;

			rt_free(rth);

		}

		spin_unlock_bh(rt_hash_lock_addr(i));

		sum += length;