From 14895687d36805f051bb54014c32e48e5937f7e1 Mon Sep 17 00:00:00 2001 From: David Ahern Date: Tue, 17 Apr 2018 17:33:17 -0700 Subject: [PATCH] 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: David Ahern Signed-off-by: David S. Miller --- include/net/ip6_fib.h | 27 +++++++++++++++++++++++---- net/ipv6/addrconf.c | 6 +++--- net/ipv6/ip6_fib.c | 8 ++++---- net/ipv6/ndisc.c | 2 +- net/ipv6/route.c | 20 +++++++++++--------- 5 files changed, 42 insertions(+), 21 deletions(-) diff --git a/include/net/ip6_fib.h b/include/net/ip6_fib.h index 1f8dc9d12abb..c73b985734f5 100644 --- a/include/net/ip6_fib.h +++ b/include/net/ip6_fib.h @@ -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; } diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index 483c8772e856..a156f1a0b1a7 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -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; diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c index 0d94c56c3e41..f25f4d9831e8 100644 --- a/net/ipv6/ip6_fib.c +++ b/net/ipv6/ip6_fib.c @@ -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; } diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c index b058ea9ecec0..e4d9eea92139 100644 --- a/net/ipv6/ndisc.c +++ b/net/ipv6/ndisc.c @@ -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) { diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 62aafd06c35f..f6ca55d21fac 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -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; -- 2.30.2