Commit 14895687 authored by David Ahern's avatar David Ahern Committed by David S. Miller
Browse files

net/ipv6: move expires into rt6_info 



Add expires to rt6_info for FIB entries, and add fib6 helpers to
manage it. Data path use of dst.expires remains.

The transition is fairly straightforward: when working with fib entries,
rt->dst.expires is just rt->expires, rt6_clean_expires is replaced with
fib6_clean_expires, rt6_set_expires becomes fib6_set_expires, and
rt6_check_expired becomes fib6_check_expired, where the fib6 versions
are added by this patch.

Signed-off-by: default avatarDavid Ahern <dsahern@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent d4ead6b3

include/net/ip6_fib.h

+23 −4
Original line number Diff line number Diff line
@@ -179,6 +179,7 @@ struct rt6_info { 
					should_flush:1,

					unused:6;



	unsigned long			expires;

	struct dst_metrics		*fib6_metrics;

#define fib6_pmtu		fib6_metrics->metrics[RTAX_MTU-1]

	struct fib6_nh			fib6_nh;
@@ -197,6 +198,26 @@ static inline struct inet6_dev *ip6_dst_idev(struct dst_entry *dst) 
	return ((struct rt6_info *)dst)->rt6i_idev;

}



static inline void fib6_clean_expires(struct rt6_info *f6i)

{

	f6i->rt6i_flags &= ~RTF_EXPIRES;

	f6i->expires = 0;

}



static inline void fib6_set_expires(struct rt6_info *f6i,

				    unsigned long expires)

{

	f6i->expires = expires;

	f6i->rt6i_flags |= RTF_EXPIRES;

}



static inline bool fib6_check_expired(const struct rt6_info *f6i)

{

	if (f6i->rt6i_flags & RTF_EXPIRES)

		return time_after(jiffies, f6i->expires);

	return false;

}



static inline void rt6_clean_expires(struct rt6_info *rt)

{

	rt->rt6i_flags &= ~RTF_EXPIRES;
@@ -211,11 +232,9 @@ static inline void rt6_set_expires(struct rt6_info *rt, unsigned long expires) 


static inline void rt6_update_expires(struct rt6_info *rt0, int timeout)

{

	struct rt6_info *rt;

	if (!(rt0->rt6i_flags & RTF_EXPIRES) && rt0->from)

		rt0->dst.expires = rt0->from->expires;



	for (rt = rt0; rt && !(rt->rt6i_flags & RTF_EXPIRES); rt = rt->from);

	if (rt && rt != rt0)

		rt0->dst.expires = rt->dst.expires;

	dst_set_expires(&rt0->dst, timeout);

	rt0->rt6i_flags |= RTF_EXPIRES;

}

net/ipv6/addrconf.c

+3 −3
Original line number Diff line number Diff line
@@ -1190,7 +1190,7 @@ cleanup_prefix_route(struct inet6_ifaddr *ifp, unsigned long expires, bool del_r 
			ip6_del_rt(dev_net(ifp->idev->dev), rt);

		else {

			if (!(rt->rt6i_flags & RTF_EXPIRES))

				rt6_set_expires(rt, expires);

				fib6_set_expires(rt, expires);

			ip6_rt_put(rt);

		}

	}
@@ -2672,9 +2672,9 @@ void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao) 
				rt = NULL;

			} else if (addrconf_finite_timeout(rt_expires)) {

				/* not infinity */

				rt6_set_expires(rt, jiffies + rt_expires);

				fib6_set_expires(rt, jiffies + rt_expires);

			} else {

				rt6_clean_expires(rt);

				fib6_clean_expires(rt);

			}

		} else if (valid_lft) {

			clock_t expires = 0;

net/ipv6/ip6_fib.c

+4 −4
Original line number Diff line number Diff line
@@ -906,9 +906,9 @@ static int fib6_add_rt2node(struct fib6_node *fn, struct rt6_info *rt, 
				if (!(iter->rt6i_flags & RTF_EXPIRES))

					return -EEXIST;

				if (!(rt->rt6i_flags & RTF_EXPIRES))

					rt6_clean_expires(iter);

					fib6_clean_expires(iter);

				else

					rt6_set_expires(iter, rt->dst.expires);

					fib6_set_expires(iter, rt->expires);

				fib6_metric_set(iter, RTAX_MTU, rt->fib6_pmtu);

				return -EEXIST;

			}
@@ -2003,8 +2003,8 @@ static int fib6_age(struct rt6_info *rt, void *arg) 
	 *	Routes are expired even if they are in use.

	 */



	if (rt->rt6i_flags & RTF_EXPIRES && rt->dst.expires) {

		if (time_after(now, rt->dst.expires)) {

	if (rt->rt6i_flags & RTF_EXPIRES && rt->expires) {

		if (time_after(now, rt->expires)) {

			RT6_TRACE("expiring %p\n", rt);

			return -1;

		}

net/ipv6/ndisc.c

+1 −1
Original line number Diff line number Diff line
@@ -1318,7 +1318,7 @@ static void ndisc_router_discovery(struct sk_buff *skb) 
	}



	if (rt)

		rt6_set_expires(rt, jiffies + (HZ * lifetime));

		fib6_set_expires(rt, jiffies + (HZ * lifetime));

	if (in6_dev->cnf.accept_ra_min_hop_limit < 256 &&

	    ra_msg->icmph.icmp6_hop_limit) {

		if (in6_dev->cnf.accept_ra_min_hop_limit <= ra_msg->icmph.icmp6_hop_limit) {

net/ipv6/route.c

+11 −9
Original line number Diff line number Diff line
@@ -435,7 +435,7 @@ static bool rt6_check_expired(const struct rt6_info *rt) 
			return true;

	} else if (rt->from) {

		return rt->dst.obsolete != DST_OBSOLETE_FORCE_CHK ||

			rt6_check_expired(rt->from);

			fib6_check_expired(rt->from);

	}

	return false;

}
@@ -687,7 +687,7 @@ static struct rt6_info *find_match(struct rt6_info *rt, int oif, int strict, 
	    !(strict & RT6_LOOKUP_F_IGNORE_LINKSTATE))

		goto out;



	if (rt6_check_expired(rt))

	if (fib6_check_expired(rt))

		goto out;



	m = rt6_score_route(rt, oif, strict);
@@ -871,9 +871,9 @@ int rt6_route_rcv(struct net_device *dev, u8 *opt, int len, 


	if (rt) {

		if (!addrconf_finite_timeout(lifetime))

			rt6_clean_expires(rt);

			fib6_clean_expires(rt);

		else

			rt6_set_expires(rt, jiffies + HZ * lifetime);

			fib6_set_expires(rt, jiffies + HZ * lifetime);



		ip6_rt_put(rt);

	}
@@ -2383,7 +2383,7 @@ restart: 
	for_each_fib6_node_rt_rcu(fn) {

		if (rt->fib6_nh.nh_flags & RTNH_F_DEAD)

			continue;

		if (rt6_check_expired(rt))

		if (fib6_check_expired(rt))

			continue;

		if (rt->rt6i_flags & RTF_REJECT)

			break;
@@ -2909,10 +2909,10 @@ static struct rt6_info *ip6_route_info_create(struct fib6_config *cfg, 
		goto out;



	if (cfg->fc_flags & RTF_EXPIRES)

		rt6_set_expires(rt, jiffies +

		fib6_set_expires(rt, jiffies +

				clock_t_to_jiffies(cfg->fc_expires));

	else

		rt6_clean_expires(rt);

		fib6_clean_expires(rt);



	if (cfg->fc_protocol == RTPROT_UNSPEC)

		cfg->fc_protocol = RTPROT_BOOT;
@@ -4599,8 +4599,10 @@ static int rt6_fill_node(struct net *net, struct sk_buff *skb, 
			goto nla_put_failure;

	}



	if (rt->rt6i_flags & RTF_EXPIRES && dst)

		expires = dst->expires - jiffies;

	if (rt->rt6i_flags & RTF_EXPIRES) {

		expires = dst ? dst->expires : rt->expires;

		expires -= jiffies;

	}



	if (rtnl_put_cacheinfo(skb, dst, 0, expires, dst ? dst->error : 0) < 0)

		goto nla_put_failure;

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