Lines Matching +full:x +full:- +full:ts +full:- +full:routes
1 // SPDX-License-Identifier: GPL-2.0-or-later
7 * ROUTE - implementation of the IP router.
48 * Andi Kleen : Load-limit warning messages.
215 seq_printf(seq, "%-127s\n", in rt_cache_seq_show()
236 for (cpu = *pos-1; cpu < nr_cpu_ids; ++cpu) { in rt_cpu_seq_start()
274 seq_printf(seq, "%08x %08x %08x %08x %08x %08x %08x " in rt_cpu_seq_show()
275 "%08x %08x %08x %08x %08x %08x " in rt_cpu_seq_show()
276 "%08x %08x %08x %08x\n", in rt_cpu_seq_show()
278 0, /* st->in_hit */ in rt_cpu_seq_show()
279 st->in_slow_tot, in rt_cpu_seq_show()
280 st->in_slow_mc, in rt_cpu_seq_show()
281 st->in_no_route, in rt_cpu_seq_show()
282 st->in_brd, in rt_cpu_seq_show()
283 st->in_martian_dst, in rt_cpu_seq_show()
284 st->in_martian_src, in rt_cpu_seq_show()
286 0, /* st->out_hit */ in rt_cpu_seq_show()
287 st->out_slow_tot, in rt_cpu_seq_show()
288 st->out_slow_mc, in rt_cpu_seq_show()
290 0, /* st->gc_total */ in rt_cpu_seq_show()
291 0, /* st->gc_ignored */ in rt_cpu_seq_show()
292 0, /* st->gc_goal_miss */ in rt_cpu_seq_show()
293 0, /* st->gc_dst_overflow */ in rt_cpu_seq_show()
294 0, /* st->in_hlist_search */ in rt_cpu_seq_show()
295 0 /* st->out_hlist_search */ in rt_cpu_seq_show()
315 return -ENOMEM; in rt_acct_proc_show()
337 pde = proc_create_seq("rt_cache", 0444, net->proc_net, in ip_rt_do_proc_init()
342 pde = proc_create_seq("rt_cache", 0444, net->proc_net_stat, in ip_rt_do_proc_init()
348 pde = proc_create_single("rt_acct", 0, net->proc_net, in ip_rt_do_proc_init()
357 remove_proc_entry("rt_cache", net->proc_net_stat); in ip_rt_do_proc_init()
360 remove_proc_entry("rt_cache", net->proc_net); in ip_rt_do_proc_init()
362 return -ENOMEM; in ip_rt_do_proc_init()
367 remove_proc_entry("rt_cache", net->proc_net_stat); in ip_rt_do_proc_exit()
368 remove_proc_entry("rt_cache", net->proc_net); in ip_rt_do_proc_exit()
370 remove_proc_entry("rt_acct", net->proc_net); in ip_rt_do_proc_exit()
393 return rth->rt_genid != rt_genid_ipv4(dev_net(rth->dst.dev)); in rt_is_expired()
406 struct net_device *dev = dst->dev; in ipv4_neigh_lookup()
411 if (likely(rt->rt_gw_family == AF_INET)) { in ipv4_neigh_lookup()
412 n = ip_neigh_gw4(dev, rt->rt_gw4); in ipv4_neigh_lookup()
413 } else if (rt->rt_gw_family == AF_INET6) { in ipv4_neigh_lookup()
414 n = ip_neigh_gw6(dev, &rt->rt_gw6); in ipv4_neigh_lookup()
418 pkey = skb ? ip_hdr(skb)->daddr : *((__be32 *) daddr); in ipv4_neigh_lookup()
422 if (!IS_ERR(n) && !refcount_inc_not_zero(&n->refcnt)) in ipv4_neigh_lookup()
433 struct net_device *dev = dst->dev; in ipv4_confirm_neigh()
436 if (rt->rt_gw_family == AF_INET) { in ipv4_confirm_neigh()
437 pkey = (const __be32 *)&rt->rt_gw4; in ipv4_confirm_neigh()
438 } else if (rt->rt_gw_family == AF_INET6) { in ipv4_confirm_neigh()
439 return __ipv6_confirm_neigh_stub(dev, &rt->rt_gw6); in ipv4_confirm_neigh()
441 (rt->rt_flags & in ipv4_confirm_neigh()
472 delta = get_random_u32_below(now - old); in ip_idents_reserve()
475 * supports -fno-strict-overflow before reporting it that was a bug in ip_idents_reserve()
476 * in UBSAN, and it has been fixed in GCC-8. in ip_idents_reserve()
478 return atomic_add_return(segs + delta, p_id) - segs; in ip_idents_reserve()
486 if (unlikely(siphash_key_is_zero(&net->ipv4.ip_id_key))) in __ip_select_ident()
487 get_random_bytes(&net->ipv4.ip_id_key, in __ip_select_ident()
488 sizeof(net->ipv4.ip_id_key)); in __ip_select_ident()
490 hash = siphash_3u32((__force u32)iph->daddr, in __ip_select_ident()
491 (__force u32)iph->saddr, in __ip_select_ident()
492 iph->protocol, in __ip_select_ident()
493 &net->ipv4.ip_id_key); in __ip_select_ident()
495 iph->id = htons(id); in __ip_select_ident()
507 oif = sk->sk_bound_dev_if; in __build_flow_key()
508 mark = READ_ONCE(sk->sk_mark); in __build_flow_key()
512 sk->sk_protocol; in __build_flow_key()
516 prot, flow_flags, iph->daddr, iph->saddr, 0, 0, in __build_flow_key()
523 const struct net *net = dev_net(skb->dev); in build_skb_flow_key()
525 int oif = skb->dev->ifindex; in build_skb_flow_key()
526 u8 prot = iph->protocol; in build_skb_flow_key()
527 u32 mark = skb->mark; in build_skb_flow_key()
528 __u8 tos = iph->tos; in build_skb_flow_key()
537 __be32 daddr = inet->inet_daddr; in build_sk_flow_key()
540 inet_opt = rcu_dereference(inet->inet_opt); in build_sk_flow_key()
541 if (inet_opt && inet_opt->opt.srr) in build_sk_flow_key()
542 daddr = inet_opt->opt.faddr; in build_sk_flow_key()
543 flowi4_init_output(fl4, sk->sk_bound_dev_if, READ_ONCE(sk->sk_mark), in build_sk_flow_key()
547 IPPROTO_RAW : sk->sk_protocol, in build_sk_flow_key()
549 daddr, inet->inet_saddr, 0, 0, sk->sk_uid); in build_sk_flow_key()
568 rt = rcu_dereference(fnhe->fnhe_rth_input); in fnhe_flush_routes()
570 RCU_INIT_POINTER(fnhe->fnhe_rth_input, NULL); in fnhe_flush_routes()
571 dst_dev_put(&rt->dst); in fnhe_flush_routes()
572 dst_release(&rt->dst); in fnhe_flush_routes()
574 rt = rcu_dereference(fnhe->fnhe_rth_output); in fnhe_flush_routes()
576 RCU_INIT_POINTER(fnhe->fnhe_rth_output, NULL); in fnhe_flush_routes()
577 dst_dev_put(&rt->dst); in fnhe_flush_routes()
578 dst_release(&rt->dst); in fnhe_flush_routes()
587 for (fnhe_p = &hash->chain; ; fnhe_p = &fnhe->fnhe_next) { in fnhe_remove_oldest()
593 time_before(fnhe->fnhe_stamp, oldest->fnhe_stamp)) { in fnhe_remove_oldest()
599 *oldest_p = oldest->fnhe_next; in fnhe_remove_oldest()
615 rt->rt_pmtu = fnhe->fnhe_pmtu; in fill_route_from_fnhe()
616 rt->rt_mtu_locked = fnhe->fnhe_mtu_locked; in fill_route_from_fnhe()
617 rt->dst.expires = fnhe->fnhe_expires; in fill_route_from_fnhe()
619 if (fnhe->fnhe_gw) { in fill_route_from_fnhe()
620 rt->rt_flags |= RTCF_REDIRECTED; in fill_route_from_fnhe()
621 rt->rt_uses_gateway = 1; in fill_route_from_fnhe()
622 rt->rt_gw_family = AF_INET; in fill_route_from_fnhe()
623 rt->rt_gw4 = fnhe->fnhe_gw; in fill_route_from_fnhe()
638 genid = fnhe_genid(dev_net(nhc->nhc_dev)); in update_or_create_fnhe()
643 hash = rcu_dereference(nhc->nhc_exceptions); in update_or_create_fnhe()
648 rcu_assign_pointer(nhc->nhc_exceptions, hash); in update_or_create_fnhe()
654 for (fnhe = rcu_dereference(hash->chain); fnhe; in update_or_create_fnhe()
655 fnhe = rcu_dereference(fnhe->fnhe_next)) { in update_or_create_fnhe()
656 if (fnhe->fnhe_daddr == daddr) in update_or_create_fnhe()
662 if (fnhe->fnhe_genid != genid) in update_or_create_fnhe()
663 fnhe->fnhe_genid = genid; in update_or_create_fnhe()
665 fnhe->fnhe_gw = gw; in update_or_create_fnhe()
667 fnhe->fnhe_pmtu = pmtu; in update_or_create_fnhe()
668 fnhe->fnhe_mtu_locked = lock; in update_or_create_fnhe()
670 fnhe->fnhe_expires = max(1UL, expires); in update_or_create_fnhe()
672 rt = rcu_dereference(fnhe->fnhe_rth_input); in update_or_create_fnhe()
675 rt = rcu_dereference(fnhe->fnhe_rth_output); in update_or_create_fnhe()
685 depth--; in update_or_create_fnhe()
692 fnhe->fnhe_next = hash->chain; in update_or_create_fnhe()
694 fnhe->fnhe_genid = genid; in update_or_create_fnhe()
695 fnhe->fnhe_daddr = daddr; in update_or_create_fnhe()
696 fnhe->fnhe_gw = gw; in update_or_create_fnhe()
697 fnhe->fnhe_pmtu = pmtu; in update_or_create_fnhe()
698 fnhe->fnhe_mtu_locked = lock; in update_or_create_fnhe()
699 fnhe->fnhe_expires = max(1UL, expires); in update_or_create_fnhe()
701 rcu_assign_pointer(hash->chain, fnhe); in update_or_create_fnhe()
703 /* Exception created; mark the cached routes for the nexthop in update_or_create_fnhe()
707 rt = rcu_dereference(nhc->nhc_rth_input); in update_or_create_fnhe()
709 rt->dst.obsolete = DST_OBSOLETE_KILL; in update_or_create_fnhe()
714 prt = per_cpu_ptr(nhc->nhc_pcpu_rth_output, i); in update_or_create_fnhe()
717 rt->dst.obsolete = DST_OBSOLETE_KILL; in update_or_create_fnhe()
721 fnhe->fnhe_stamp = jiffies; in update_or_create_fnhe()
730 __be32 new_gw = icmp_hdr(skb)->un.gateway; in __ip_do_redirect()
731 __be32 old_gw = ip_hdr(skb)->saddr; in __ip_do_redirect()
732 struct net_device *dev = skb->dev; in __ip_do_redirect()
738 switch (icmp_hdr(skb)->code & 7) { in __ip_do_redirect()
749 if (rt->rt_gw_family != AF_INET || rt->rt_gw4 != old_gw) in __ip_do_redirect()
772 n = __ipv4_neigh_lookup(rt->dst.dev, (__force u32)new_gw); in __ip_do_redirect()
774 n = neigh_create(&arp_tbl, &new_gw, rt->dst.dev); in __ip_do_redirect()
776 if (!(READ_ONCE(n->nud_state) & NUD_VALID)) { in __ip_do_redirect()
784 update_or_create_fnhe(nhc, fl4->daddr, new_gw, in __ip_do_redirect()
789 rt->dst.obsolete = DST_OBSOLETE_KILL; in __ip_do_redirect()
799 const struct iphdr *iph = (const struct iphdr *) skb->data; in __ip_do_redirect()
800 __be32 daddr = iph->daddr; in __ip_do_redirect()
801 __be32 saddr = iph->saddr; in __ip_do_redirect()
804 " Advised path = %pI4 -> %pI4\n", in __ip_do_redirect()
805 &old_gw, dev->name, &new_gw, in __ip_do_redirect()
816 const struct iphdr *iph = (const struct iphdr *) skb->data; in ip_do_redirect()
817 struct net *net = dev_net(skb->dev); in ip_do_redirect()
818 int oif = skb->dev->ifindex; in ip_do_redirect()
819 u8 prot = iph->protocol; in ip_do_redirect()
820 u32 mark = skb->mark; in ip_do_redirect()
821 __u8 tos = iph->tos; in ip_do_redirect()
834 if ((dst->obsolete > 0) || in ipv4_negative_advice()
835 (rt->rt_flags & RTCF_REDIRECTED) || in ipv4_negative_advice()
836 rt->dst.expires) in ipv4_negative_advice()
866 in_dev = __in_dev_get_rcu(rt->dst.dev); in ip_rt_send_redirect()
872 vif = l3mdev_master_ifindex_rcu(rt->dst.dev); in ip_rt_send_redirect()
875 net = dev_net(rt->dst.dev); in ip_rt_send_redirect()
876 peer = inet_getpeer_v4(net->ipv4.peers, ip_hdr(skb)->saddr, vif, 1); in ip_rt_send_redirect()
879 rt_nexthop(rt, ip_hdr(skb)->daddr)); in ip_rt_send_redirect()
886 if (time_after(jiffies, peer->rate_last + ip_rt_redirect_silence)) { in ip_rt_send_redirect()
887 peer->rate_tokens = 0; in ip_rt_send_redirect()
888 peer->n_redirects = 0; in ip_rt_send_redirect()
894 if (peer->n_redirects >= ip_rt_redirect_number) { in ip_rt_send_redirect()
895 peer->rate_last = jiffies; in ip_rt_send_redirect()
902 if (peer->n_redirects == 0 || in ip_rt_send_redirect()
904 (peer->rate_last + in ip_rt_send_redirect()
905 (ip_rt_redirect_load << peer->n_redirects)))) { in ip_rt_send_redirect()
906 __be32 gw = rt_nexthop(rt, ip_hdr(skb)->daddr); in ip_rt_send_redirect()
909 peer->rate_last = jiffies; in ip_rt_send_redirect()
910 ++peer->n_redirects; in ip_rt_send_redirect()
912 peer->n_redirects == ip_rt_redirect_number) in ip_rt_send_redirect()
914 &ip_hdr(skb)->saddr, inet_iif(skb), in ip_rt_send_redirect()
915 &ip_hdr(skb)->daddr, &gw); in ip_rt_send_redirect()
924 struct net_device *dev = skb->dev; in ip_error()
933 if (netif_is_l3_master(skb->dev)) { in ip_error()
934 dev = __dev_get_by_index(dev_net(skb->dev), IPCB(skb)->iif); in ip_error()
945 net = dev_net(rt->dst.dev); in ip_error()
947 switch (rt->dst.error) { in ip_error()
961 switch (rt->dst.error) { in ip_error()
978 peer = inet_getpeer_v4(net->ipv4.peers, ip_hdr(skb)->saddr, in ip_error()
979 l3mdev_master_ifindex(skb->dev), 1); in ip_error()
984 peer->rate_tokens += now - peer->rate_last; in ip_error()
985 if (peer->rate_tokens > ip_rt_error_burst) in ip_error()
986 peer->rate_tokens = ip_rt_error_burst; in ip_error()
987 peer->rate_last = now; in ip_error()
988 if (peer->rate_tokens >= ip_rt_error_cost) in ip_error()
989 peer->rate_tokens -= ip_rt_error_cost; in ip_error()
1003 struct dst_entry *dst = &rt->dst; in __ip_rt_update_pmtu()
1004 struct net *net = dev_net(dst->dev); in __ip_rt_update_pmtu()
1016 if (mtu < net->ipv4.ip_rt_min_pmtu) { in __ip_rt_update_pmtu()
1018 mtu = min(old_mtu, net->ipv4.ip_rt_min_pmtu); in __ip_rt_update_pmtu()
1021 if (rt->rt_pmtu == mtu && !lock && in __ip_rt_update_pmtu()
1022 time_before(jiffies, dst->expires - net->ipv4.ip_rt_mtu_expires / 2)) in __ip_rt_update_pmtu()
1036 update_or_create_fnhe(nhc, fl4->daddr, 0, mtu, lock, in __ip_rt_update_pmtu()
1037 jiffies + net->ipv4.ip_rt_mtu_expires); in __ip_rt_update_pmtu()
1044 update_or_create_fnhe(nhc, fl4->daddr, 0, mtu, lock, in __ip_rt_update_pmtu()
1045 jiffies + net->ipv4.ip_rt_mtu_expires); in __ip_rt_update_pmtu()
1060 if (skb && netif_is_any_bridge_port(skb->dev)) in ip_rt_update_pmtu()
1069 const struct iphdr *iph = (const struct iphdr *)skb->data; in ipv4_update_pmtu()
1072 u32 mark = IP4_REPLY_MARK(net, skb->mark); in ipv4_update_pmtu()
1074 __build_flow_key(net, &fl4, NULL, iph, oif, iph->tos, protocol, mark, in ipv4_update_pmtu()
1086 const struct iphdr *iph = (const struct iphdr *)skb->data; in __ipv4_sk_update_pmtu()
1093 fl4.flowi4_mark = IP4_REPLY_MARK(sock_net(sk), skb->mark); in __ipv4_sk_update_pmtu()
1104 const struct iphdr *iph = (const struct iphdr *)skb->data; in ipv4_sk_update_pmtu()
1126 if (odst->obsolete && !odst->ops->check(odst, 0)) { in ipv4_sk_update_pmtu()
1134 __ip_rt_update_pmtu(dst_rtable(xfrm_dst_path(&rt->dst)), &fl4, mtu); in ipv4_sk_update_pmtu()
1136 if (!dst_check(&rt->dst, 0)) { in ipv4_sk_update_pmtu()
1138 dst_release(&rt->dst); in ipv4_sk_update_pmtu()
1148 sk_dst_set(sk, &rt->dst); in ipv4_sk_update_pmtu()
1159 const struct iphdr *iph = (const struct iphdr *)skb->data; in ipv4_redirect()
1163 __build_flow_key(net, &fl4, NULL, iph, oif, iph->tos, protocol, 0, 0); in ipv4_redirect()
1174 const struct iphdr *iph = (const struct iphdr *)skb->data; in ipv4_sk_redirect()
1193 /* All IPV4 dsts are created with ->obsolete set to the value in ipv4_dst_check()
1201 if (dst->obsolete != DST_OBSOLETE_FORCE_CHK || rt_is_expired(rt)) in ipv4_dst_check()
1217 ip_hdr(skb)->version != 4 || ip_hdr(skb)->ihl < 5) in ipv4_send_dest_unreach()
1221 if (ip_hdr(skb)->ihl > 5) { in ipv4_send_dest_unreach()
1222 if (!pskb_network_may_pull(skb, ip_hdr(skb)->ihl * 4)) in ipv4_send_dest_unreach()
1224 opt.optlen = ip_hdr(skb)->ihl * 4 - sizeof(struct iphdr); in ipv4_send_dest_unreach()
1227 dev = skb->dev ? skb->dev : skb_rtable(skb)->dst.dev; in ipv4_send_dest_unreach()
1245 dst_set_expires(&rt->dst, 0); in ipv4_link_failure()
1250 pr_debug("%s: %pI4 -> %pI4, %s\n", in ip_rt_bug()
1251 __func__, &ip_hdr(skb)->saddr, &ip_hdr(skb)->daddr, in ip_rt_bug()
1252 skb->dev ? skb->dev->name : "?"); in ip_rt_bug()
1260 * because it is used only by IP RR, TS and SRR options,
1272 src = ip_hdr(skb)->saddr; in ip_rt_get_source()
1277 .daddr = iph->daddr, in ip_rt_get_source()
1278 .saddr = iph->saddr, in ip_rt_get_source()
1280 .flowi4_oif = rt->dst.dev->ifindex, in ip_rt_get_source()
1281 .flowi4_iif = skb->dev->ifindex, in ip_rt_get_source()
1282 .flowi4_mark = skb->mark, in ip_rt_get_source()
1286 if (fib_lookup(dev_net(rt->dst.dev), &fl4, &res, 0) == 0) in ip_rt_get_source()
1287 src = fib_result_prefsrc(dev_net(rt->dst.dev), &res); in ip_rt_get_source()
1289 src = inet_select_addr(rt->dst.dev, in ip_rt_get_source()
1290 rt_nexthop(rt, iph->daddr), in ip_rt_get_source()
1300 if (!(rt->dst.tclassid & 0xFFFF)) in set_class_tag()
1301 rt->dst.tclassid |= tag & 0xFFFF; in set_class_tag()
1302 if (!(rt->dst.tclassid & 0xFFFF0000)) in set_class_tag()
1303 rt->dst.tclassid |= tag & 0xFFFF0000; in set_class_tag()
1309 struct net *net = dev_net(dst->dev); in ipv4_default_advmss()
1311 unsigned int advmss = max_t(unsigned int, ipv4_mtu(dst) - header_size, in ipv4_default_advmss()
1312 net->ipv4.ip_rt_min_advmss); in ipv4_default_advmss()
1314 return min(advmss, IPV4_MAX_PMTU - header_size); in ipv4_default_advmss()
1331 hash = rcu_dereference_protected(nhc->nhc_exceptions, in ip_del_fnhe()
1335 fnhe_p = &hash->chain; in ip_del_fnhe()
1338 if (fnhe->fnhe_daddr == daddr) { in ip_del_fnhe()
1340 fnhe->fnhe_next, lockdep_is_held(&fnhe_lock))); in ip_del_fnhe()
1344 fnhe->fnhe_daddr = 0; in ip_del_fnhe()
1349 fnhe_p = &fnhe->fnhe_next; in ip_del_fnhe()
1350 fnhe = rcu_dereference_protected(fnhe->fnhe_next, in ip_del_fnhe()
1360 struct fnhe_hash_bucket *hash = rcu_dereference(nhc->nhc_exceptions); in find_exception()
1370 fnhe = rcu_dereference(fnhe->fnhe_next)) { in find_exception()
1371 if (fnhe->fnhe_daddr == daddr) { in find_exception()
1372 if (fnhe->fnhe_expires && in find_exception()
1373 time_after(jiffies, fnhe->fnhe_expires)) { in find_exception()
1384 * 1. mtu on route is locked - use it
1391 struct fib_nh_common *nhc = res->nhc; in ip_mtu_from_fib_result()
1392 struct net_device *dev = nhc->nhc_dev; in ip_mtu_from_fib_result()
1393 struct fib_info *fi = res->fi; in ip_mtu_from_fib_result()
1396 if (READ_ONCE(dev_net(dev)->ipv4.sysctl_ip_fwd_use_pmtu) || in ip_mtu_from_fib_result()
1397 fi->fib_metrics->metrics[RTAX_LOCK - 1] & (1 << RTAX_MTU)) in ip_mtu_from_fib_result()
1398 mtu = fi->fib_mtu; in ip_mtu_from_fib_result()
1404 if (fnhe && !time_after_eq(jiffies, fnhe->fnhe_expires)) in ip_mtu_from_fib_result()
1405 mtu = fnhe->fnhe_pmtu; in ip_mtu_from_fib_result()
1409 mtu = min(READ_ONCE(dev->mtu), IP_MAX_MTU); in ip_mtu_from_fib_result()
1411 return mtu - lwtunnel_headroom(nhc->nhc_lwtstate, mtu); in ip_mtu_from_fib_result()
1421 if (daddr == fnhe->fnhe_daddr) { in rt_bind_exception()
1424 int genid = fnhe_genid(dev_net(rt->dst.dev)); in rt_bind_exception()
1427 porig = &fnhe->fnhe_rth_input; in rt_bind_exception()
1429 porig = &fnhe->fnhe_rth_output; in rt_bind_exception()
1432 if (fnhe->fnhe_genid != genid) { in rt_bind_exception()
1433 fnhe->fnhe_genid = genid; in rt_bind_exception()
1434 fnhe->fnhe_gw = 0; in rt_bind_exception()
1435 fnhe->fnhe_pmtu = 0; in rt_bind_exception()
1436 fnhe->fnhe_expires = 0; in rt_bind_exception()
1437 fnhe->fnhe_mtu_locked = false; in rt_bind_exception()
1442 if (!rt->rt_gw4) { in rt_bind_exception()
1443 rt->rt_gw4 = daddr; in rt_bind_exception()
1444 rt->rt_gw_family = AF_INET; in rt_bind_exception()
1448 dst_hold(&rt->dst); in rt_bind_exception()
1451 dst_dev_put(&orig->dst); in rt_bind_exception()
1452 dst_release(&orig->dst); in rt_bind_exception()
1457 fnhe->fnhe_stamp = jiffies; in rt_bind_exception()
1470 p = (struct rtable **)&nhc->nhc_rth_input; in rt_cache_route()
1472 p = (struct rtable **)raw_cpu_ptr(nhc->nhc_pcpu_rth_output); in rt_cache_route()
1479 dst_hold(&rt->dst); in rt_cache_route()
1484 dst_release(&orig->dst); in rt_cache_route()
1487 dst_release(&rt->dst); in rt_cache_route()
1505 rt->dst.rt_uncached_list = ul; in rt_add_uncached_list()
1507 spin_lock_bh(&ul->lock); in rt_add_uncached_list()
1508 list_add_tail(&rt->dst.rt_uncached, &ul->head); in rt_add_uncached_list()
1509 spin_unlock_bh(&ul->lock); in rt_add_uncached_list()
1514 if (!list_empty(&rt->dst.rt_uncached)) { in rt_del_uncached_list()
1515 struct uncached_list *ul = rt->dst.rt_uncached_list; in rt_del_uncached_list()
1517 spin_lock_bh(&ul->lock); in rt_del_uncached_list()
1518 list_del_init(&rt->dst.rt_uncached); in rt_del_uncached_list()
1519 spin_unlock_bh(&ul->lock); in rt_del_uncached_list()
1537 if (list_empty(&ul->head)) in rt_flush_dev()
1540 spin_lock_bh(&ul->lock); in rt_flush_dev()
1541 list_for_each_entry_safe(rt, safe, &ul->head, dst.rt_uncached) { in rt_flush_dev()
1542 if (rt->dst.dev != dev) in rt_flush_dev()
1544 rt->dst.dev = blackhole_netdev; in rt_flush_dev()
1546 &rt->dst.dev_tracker, GFP_ATOMIC); in rt_flush_dev()
1547 list_del_init(&rt->dst.rt_uncached); in rt_flush_dev()
1549 spin_unlock_bh(&ul->lock); in rt_flush_dev()
1556 rt->dst.obsolete == DST_OBSOLETE_FORCE_CHK && in rt_cache_valid()
1571 if (nhc->nhc_gw_family && nhc->nhc_scope == RT_SCOPE_LINK) { in rt_set_nexthop()
1572 rt->rt_uses_gateway = 1; in rt_set_nexthop()
1573 rt->rt_gw_family = nhc->nhc_gw_family; in rt_set_nexthop()
1575 if (likely(nhc->nhc_gw_family == AF_INET)) in rt_set_nexthop()
1576 rt->rt_gw4 = nhc->nhc_gw.ipv4; in rt_set_nexthop()
1578 rt->rt_gw6 = nhc->nhc_gw.ipv6; in rt_set_nexthop()
1581 ip_dst_init_metrics(&rt->dst, fi->fib_metrics); in rt_set_nexthop()
1584 if (nhc->nhc_family == AF_INET) { in rt_set_nexthop()
1588 rt->dst.tclassid = nh->nh_tclassid; in rt_set_nexthop()
1591 rt->dst.lwtstate = lwtstate_get(nhc->nhc_lwtstate); in rt_set_nexthop()
1597 /* Routes we intend to cache in nexthop exception or in rt_set_nexthop()
1602 if (!rt->rt_gw4) { in rt_set_nexthop()
1603 rt->rt_gw_family = AF_INET; in rt_set_nexthop()
1604 rt->rt_gw4 = daddr; in rt_set_nexthop()
1613 set_class_tag(rt, res->tclassid); in rt_set_nexthop()
1629 rt->rt_genid = rt_genid_ipv4(dev_net(dev)); in rt_dst_alloc()
1630 rt->rt_flags = flags; in rt_dst_alloc()
1631 rt->rt_type = type; in rt_dst_alloc()
1632 rt->rt_is_input = 0; in rt_dst_alloc()
1633 rt->rt_iif = 0; in rt_dst_alloc()
1634 rt->rt_pmtu = 0; in rt_dst_alloc()
1635 rt->rt_mtu_locked = 0; in rt_dst_alloc()
1636 rt->rt_uses_gateway = 0; in rt_dst_alloc()
1637 rt->rt_gw_family = 0; in rt_dst_alloc()
1638 rt->rt_gw4 = 0; in rt_dst_alloc()
1640 rt->dst.output = ip_output; in rt_dst_alloc()
1642 rt->dst.input = ip_local_deliver; in rt_dst_alloc()
1654 rt->dst.flags); in rt_dst_clone()
1657 new_rt->rt_genid = rt_genid_ipv4(dev_net(dev)); in rt_dst_clone()
1658 new_rt->rt_flags = rt->rt_flags; in rt_dst_clone()
1659 new_rt->rt_type = rt->rt_type; in rt_dst_clone()
1660 new_rt->rt_is_input = rt->rt_is_input; in rt_dst_clone()
1661 new_rt->rt_iif = rt->rt_iif; in rt_dst_clone()
1662 new_rt->rt_pmtu = rt->rt_pmtu; in rt_dst_clone()
1663 new_rt->rt_mtu_locked = rt->rt_mtu_locked; in rt_dst_clone()
1664 new_rt->rt_gw_family = rt->rt_gw_family; in rt_dst_clone()
1665 if (rt->rt_gw_family == AF_INET) in rt_dst_clone()
1666 new_rt->rt_gw4 = rt->rt_gw4; in rt_dst_clone()
1667 else if (rt->rt_gw_family == AF_INET6) in rt_dst_clone()
1668 new_rt->rt_gw6 = rt->rt_gw6; in rt_dst_clone()
1670 new_rt->dst.input = rt->dst.input; in rt_dst_clone()
1671 new_rt->dst.output = rt->dst.output; in rt_dst_clone()
1672 new_rt->dst.error = rt->dst.error; in rt_dst_clone()
1673 new_rt->dst.lastuse = jiffies; in rt_dst_clone()
1674 new_rt->dst.lwtstate = lwtstate_get(rt->dst.lwtstate); in rt_dst_clone()
1695 if (skb->protocol != htons(ETH_P_IP)) in ip_mc_validate_source()
1703 ip_hdr(skb)->protocol != IPPROTO_IGMP) in ip_mc_validate_source()
1734 IPCB(skb)->flags |= IPSKB_NOPOLICY; in ip_route_input_mc()
1736 rth = rt_dst_alloc(dev_net(dev)->loopback_dev, flags, RTN_MULTICAST, in ip_route_input_mc()
1742 rth->dst.tclassid = itag; in ip_route_input_mc()
1744 rth->dst.output = ip_rt_bug; in ip_route_input_mc()
1745 rth->rt_is_input= 1; in ip_route_input_mc()
1749 rth->dst.input = ip_mr_input; in ip_route_input_mc()
1754 skb_dst_set(skb, &rth->dst); in ip_route_input_mc()
1773 &daddr, &saddr, dev->name); in ip_handle_martian_source()
1774 if (dev->hard_header_len && skb_mac_header_was_set(skb)) { in ip_handle_martian_source()
1778 dev->hard_header_len, false); in ip_handle_martian_source()
1792 struct net_device *dev = nhc->nhc_dev; in __mkroute_input()
1808 in_dev->dev, in_dev, &itag); in __mkroute_input()
1810 reason = -err; in __mkroute_input()
1811 ip_handle_martian_source(in_dev->dev, in_dev, skb, daddr, in __mkroute_input()
1817 do_cache = res->fi && !itag; in __mkroute_input()
1819 skb->protocol == htons(ETH_P_IP)) { in __mkroute_input()
1822 gw = nhc->nhc_gw_family == AF_INET ? nhc->nhc_gw.ipv4 : 0; in __mkroute_input()
1825 IPCB(skb)->flags |= IPSKB_DOREDIRECT; in __mkroute_input()
1828 if (skb->protocol != htons(ETH_P_IP)) { in __mkroute_input()
1830 * invalid for proxy arp. DNAT routes are always valid. in __mkroute_input()
1844 IPCB(skb)->flags |= IPSKB_NOPOLICY; in __mkroute_input()
1849 rth = rcu_dereference(fnhe->fnhe_rth_input); in __mkroute_input()
1851 rth = rcu_dereference(nhc->nhc_rth_input); in __mkroute_input()
1853 skb_dst_set_noref(skb, &rth->dst); in __mkroute_input()
1858 rth = rt_dst_alloc(out_dev->dev, 0, res->type, in __mkroute_input()
1865 rth->rt_is_input = 1; in __mkroute_input()
1868 rth->dst.input = ip_forward; in __mkroute_input()
1870 rt_set_nexthop(rth, daddr, res, fnhe, res->fi, res->type, itag, in __mkroute_input()
1872 lwtunnel_set_redirect(&rth->dst); in __mkroute_input()
1873 skb_dst_set(skb, &rth->dst); in __mkroute_input()
1894 if (likely(outer_iph->protocol != IPPROTO_ICMP)) in ip_multipath_l3_keys()
1897 if (unlikely((outer_iph->frag_off & htons(IP_OFFSET)) != 0)) in ip_multipath_l3_keys()
1900 icmph = skb_header_pointer(skb, outer_iph->ihl * 4, sizeof(_icmph), in ip_multipath_l3_keys()
1905 if (!icmp_is_err(icmph->type)) in ip_multipath_l3_keys()
1909 outer_iph->ihl * 4 + sizeof(_icmph), in ip_multipath_l3_keys()
1916 hash_keys->addrs.v4addrs.src = key_iph->saddr; in ip_multipath_l3_keys()
1917 hash_keys->addrs.v4addrs.dst = key_iph->daddr; in ip_multipath_l3_keys()
1924 u32 hash_fields = READ_ONCE(net->ipv4.sysctl_fib_multipath_hash_fields); in fib_multipath_custom_hash_outer()
1953 u32 hash_fields = READ_ONCE(net->ipv4.sysctl_fib_multipath_hash_fields); in fib_multipath_custom_hash_inner()
2013 u32 hash_fields = READ_ONCE(net->ipv4.sysctl_fib_multipath_hash_fields); in fib_multipath_custom_hash_fl4()
2022 hash_keys.addrs.v4addrs.src = fl4->saddr; in fib_multipath_custom_hash_fl4()
2024 hash_keys.addrs.v4addrs.dst = fl4->daddr; in fib_multipath_custom_hash_fl4()
2026 hash_keys.basic.ip_proto = fl4->flowi4_proto; in fib_multipath_custom_hash_fl4()
2028 hash_keys.ports.src = fl4->fl4_sport; in fib_multipath_custom_hash_fl4()
2030 hash_keys.ports.dst = fl4->fl4_dport; in fib_multipath_custom_hash_fl4()
2039 u32 multipath_hash = fl4 ? fl4->flowi4_multipath_hash : 0; in fib_multipath_hash()
2043 switch (READ_ONCE(net->ipv4.sysctl_fib_multipath_hash_policy)) { in fib_multipath_hash()
2050 hash_keys.addrs.v4addrs.src = fl4->saddr; in fib_multipath_hash()
2051 hash_keys.addrs.v4addrs.dst = fl4->daddr; in fib_multipath_hash()
2061 /* short-circuit if we already have L4 hash present */ in fib_multipath_hash()
2062 if (skb->l4_hash) in fib_multipath_hash()
2073 hash_keys.addrs.v4addrs.src = flkeys->addrs.v4addrs.src; in fib_multipath_hash()
2074 hash_keys.addrs.v4addrs.dst = flkeys->addrs.v4addrs.dst; in fib_multipath_hash()
2075 hash_keys.ports.src = flkeys->ports.src; in fib_multipath_hash()
2076 hash_keys.ports.dst = flkeys->ports.dst; in fib_multipath_hash()
2077 hash_keys.basic.ip_proto = flkeys->basic.ip_proto; in fib_multipath_hash()
2081 hash_keys.addrs.v4addrs.src = fl4->saddr; in fib_multipath_hash()
2082 hash_keys.addrs.v4addrs.dst = fl4->daddr; in fib_multipath_hash()
2083 hash_keys.ports.src = fl4->fl4_sport; in fib_multipath_hash()
2084 hash_keys.ports.dst = fl4->fl4_dport; in fib_multipath_hash()
2085 hash_keys.basic.ip_proto = fl4->flowi4_proto; in fib_multipath_hash()
2115 hash_keys.addrs.v4addrs.src = fl4->saddr; in fib_multipath_hash()
2116 hash_keys.addrs.v4addrs.dst = fl4->daddr; in fib_multipath_hash()
2141 if (res->fi && fib_info_num_path(res->fi) > 1) { in ip_mkroute_input()
2142 int h = fib_multipath_hash(res->fi->fib_net, NULL, skb, hkeys); in ip_mkroute_input()
2145 IPCB(skb)->flags |= IPSKB_MULTIPATH; in ip_mkroute_input()
2153 /* Implements all the saddr-related checks as ip_route_input_slow(),
2186 if (rt->rt_type != RTN_LOCAL) in ip_route_use_hint()
2203 /* get device for dst_alloc with local routes */
2207 struct fib_nh_common *nhc = res->fi ? res->nhc : NULL; in ip_rt_get_dev()
2211 dev = l3mdev_master_dev_rcu(nhc->nhc_dev); in ip_rt_get_dev()
2213 return dev ? : net->loopback_dev; in ip_rt_get_dev()
2239 int err = -EINVAL; in ip_route_input_slow()
2256 if (tun_info && !(tun_info->mode & IP_TUNNEL_INFO_TX)) in ip_route_input_slow()
2257 fl4.flowi4_tun_key.tun_id = tun_info->key.tun_id; in ip_route_input_slow()
2267 res->fi = NULL; in ip_route_input_slow()
2268 res->table = NULL; in ip_route_input_slow()
2273 * I even do not know to fix it or not. Waiting for complains :-) in ip_route_input_slow()
2305 fl4.flowi4_iif = dev->ifindex; in ip_route_input_slow()
2306 fl4.flowi4_mark = skb->mark; in ip_route_input_slow()
2326 err = -EHOSTUNREACH; in ip_route_input_slow()
2330 if (res->type == RTN_BROADCAST) { in ip_route_input_slow()
2339 err = -EINVAL; in ip_route_input_slow()
2340 if (res->type == RTN_LOCAL) { in ip_route_input_slow()
2349 err = -EHOSTUNREACH; in ip_route_input_slow()
2352 if (res->type != RTN_UNICAST) { in ip_route_input_slow()
2365 if (skb->protocol != htons(ETH_P_IP)) { in ip_route_input_slow()
2377 res->type = RTN_BROADCAST; in ip_route_input_slow()
2382 IPCB(skb)->flags |= IPSKB_NOPOLICY; in ip_route_input_slow()
2384 do_cache &= res->fi && !itag; in ip_route_input_slow()
2388 rth = rcu_dereference(nhc->nhc_rth_input); in ip_route_input_slow()
2390 skb_dst_set_noref(skb, &rth->dst); in ip_route_input_slow()
2397 flags | RTCF_LOCAL, res->type, false); in ip_route_input_slow()
2401 rth->dst.output= ip_rt_bug; in ip_route_input_slow()
2403 rth->dst.tclassid = itag; in ip_route_input_slow()
2405 rth->rt_is_input = 1; in ip_route_input_slow()
2408 if (res->type == RTN_UNREACHABLE) { in ip_route_input_slow()
2409 rth->dst.input= ip_error; in ip_route_input_slow()
2410 rth->dst.error= -err; in ip_route_input_slow()
2411 rth->rt_flags &= ~RTCF_LOCAL; in ip_route_input_slow()
2417 rth->dst.lwtstate = lwtstate_get(nhc->nhc_lwtstate); in ip_route_input_slow()
2418 if (lwtunnel_input_redirect(rth->dst.lwtstate)) { in ip_route_input_slow()
2419 WARN_ON(rth->dst.input == lwtunnel_input); in ip_route_input_slow()
2420 rth->dst.lwtstate->orig_input = rth->dst.input; in ip_route_input_slow()
2421 rth->dst.input = lwtunnel_input; in ip_route_input_slow()
2427 skb_dst_set(skb, &rth->dst); in ip_route_input_slow()
2433 res->type = RTN_UNREACHABLE; in ip_route_input_slow()
2434 res->fi = NULL; in ip_route_input_slow()
2435 res->table = NULL; in ip_route_input_slow()
2446 &daddr, &saddr, dev->name); in ip_route_input_slow()
2466 * hardware multicast filters :-( As result the host on multicasting in ip_route_input_rcu()
2484 ip_hdr(skb)->protocol); in ip_route_input_rcu()
2490 l3_in_dev = __in_dev_get_rcu(skb->dev); in ip_route_input_rcu()
2493 ip_hdr(skb)->protocol); in ip_route_input_rcu()
2533 struct fib_info *fi = res->fi; in __mkroute_output()
2536 u16 type = res->type; in __mkroute_output()
2542 return ERR_PTR(-EINVAL); in __mkroute_output()
2545 if (ipv4_is_loopback(fl4->saddr) && in __mkroute_output()
2546 !(dev_out->flags & IFF_LOOPBACK) && in __mkroute_output()
2548 return ERR_PTR(-EINVAL); in __mkroute_output()
2550 if (ipv4_is_lbcast(fl4->daddr)) in __mkroute_output()
2552 else if (ipv4_is_multicast(fl4->daddr)) in __mkroute_output()
2554 else if (ipv4_is_zeronet(fl4->daddr)) in __mkroute_output()
2555 return ERR_PTR(-EINVAL); in __mkroute_output()
2557 if (dev_out->flags & IFF_LOOPBACK) in __mkroute_output()
2566 if (!ip_check_mc_rcu(in_dev, fl4->daddr, fl4->saddr, in __mkroute_output()
2567 fl4->flowi4_proto)) in __mkroute_output()
2575 if (fi && res->prefixlen < 4) in __mkroute_output()
2578 (orig_oif != dev_out->ifindex)) { in __mkroute_output()
2579 /* For local routes that require a particular output interface in __mkroute_output()
2597 fnhe = find_exception(nhc, fl4->daddr); in __mkroute_output()
2601 prth = &fnhe->fnhe_rth_output; in __mkroute_output()
2603 if (unlikely(fl4->flowi4_flags & in __mkroute_output()
2605 !(nhc->nhc_gw_family && in __mkroute_output()
2606 nhc->nhc_scope == RT_SCOPE_LINK))) { in __mkroute_output()
2610 prth = raw_cpu_ptr(nhc->nhc_pcpu_rth_output); in __mkroute_output()
2613 if (rt_cache_valid(rth) && dst_hold_safe(&rth->dst)) in __mkroute_output()
2621 return ERR_PTR(-ENOBUFS); in __mkroute_output()
2623 rth->rt_iif = orig_oif; in __mkroute_output()
2629 !(dev_out->flags & IFF_LOOPBACK)) { in __mkroute_output()
2630 rth->dst.output = ip_mc_output; in __mkroute_output()
2636 !ipv4_is_local_multicast(fl4->daddr)) { in __mkroute_output()
2637 rth->dst.input = ip_mr_input; in __mkroute_output()
2638 rth->dst.output = ip_mc_output; in __mkroute_output()
2644 rt_set_nexthop(rth, fl4->daddr, res, fnhe, fi, type, 0, do_cache); in __mkroute_output()
2645 lwtunnel_set_redirect(&rth->dst); in __mkroute_output()
2665 fl4->flowi4_iif = LOOPBACK_IFINDEX; in ip_route_output_key_hash()
2666 fl4->flowi4_tos &= INET_DSCP_MASK; in ip_route_output_key_hash()
2681 int orig_oif = fl4->flowi4_oif; in ip_route_output_key_hash_rcu()
2686 if (fl4->saddr) { in ip_route_output_key_hash_rcu()
2687 if (ipv4_is_multicast(fl4->saddr) || in ip_route_output_key_hash_rcu()
2688 ipv4_is_lbcast(fl4->saddr) || in ip_route_output_key_hash_rcu()
2689 ipv4_is_zeronet(fl4->saddr)) { in ip_route_output_key_hash_rcu()
2690 rth = ERR_PTR(-EINVAL); in ip_route_output_key_hash_rcu()
2694 rth = ERR_PTR(-ENETUNREACH); in ip_route_output_key_hash_rcu()
2696 /* I removed check for oif == dev_out->oif here. in ip_route_output_key_hash_rcu()
2701 * of another iface. --ANK in ip_route_output_key_hash_rcu()
2704 if (fl4->flowi4_oif == 0 && in ip_route_output_key_hash_rcu()
2705 (ipv4_is_multicast(fl4->daddr) || in ip_route_output_key_hash_rcu()
2706 ipv4_is_lbcast(fl4->daddr))) { in ip_route_output_key_hash_rcu()
2708 dev_out = __ip_dev_find(net, fl4->saddr, false); in ip_route_output_key_hash_rcu()
2727 fl4->flowi4_oif = dev_out->ifindex; in ip_route_output_key_hash_rcu()
2731 if (!(fl4->flowi4_flags & FLOWI_FLAG_ANYSRC)) { in ip_route_output_key_hash_rcu()
2733 if (!__ip_dev_find(net, fl4->saddr, false)) in ip_route_output_key_hash_rcu()
2739 if (fl4->flowi4_oif) { in ip_route_output_key_hash_rcu()
2740 dev_out = dev_get_by_index_rcu(net, fl4->flowi4_oif); in ip_route_output_key_hash_rcu()
2741 rth = ERR_PTR(-ENODEV); in ip_route_output_key_hash_rcu()
2746 if (!(dev_out->flags & IFF_UP) || !__in_dev_get_rcu(dev_out)) { in ip_route_output_key_hash_rcu()
2747 rth = ERR_PTR(-ENETUNREACH); in ip_route_output_key_hash_rcu()
2750 if (ipv4_is_local_multicast(fl4->daddr) || in ip_route_output_key_hash_rcu()
2751 ipv4_is_lbcast(fl4->daddr) || in ip_route_output_key_hash_rcu()
2752 fl4->flowi4_proto == IPPROTO_IGMP) { in ip_route_output_key_hash_rcu()
2753 if (!fl4->saddr) in ip_route_output_key_hash_rcu()
2754 fl4->saddr = inet_select_addr(dev_out, 0, in ip_route_output_key_hash_rcu()
2758 if (!fl4->saddr) { in ip_route_output_key_hash_rcu()
2759 if (ipv4_is_multicast(fl4->daddr)) in ip_route_output_key_hash_rcu()
2760 fl4->saddr = inet_select_addr(dev_out, 0, in ip_route_output_key_hash_rcu()
2761 fl4->flowi4_scope); in ip_route_output_key_hash_rcu()
2762 else if (!fl4->daddr) in ip_route_output_key_hash_rcu()
2763 fl4->saddr = inet_select_addr(dev_out, 0, in ip_route_output_key_hash_rcu()
2768 if (!fl4->daddr) { in ip_route_output_key_hash_rcu()
2769 fl4->daddr = fl4->saddr; in ip_route_output_key_hash_rcu()
2770 if (!fl4->daddr) in ip_route_output_key_hash_rcu()
2771 fl4->daddr = fl4->saddr = htonl(INADDR_LOOPBACK); in ip_route_output_key_hash_rcu()
2772 dev_out = net->loopback_dev; in ip_route_output_key_hash_rcu()
2773 fl4->flowi4_oif = LOOPBACK_IFINDEX; in ip_route_output_key_hash_rcu()
2774 res->type = RTN_LOCAL; in ip_route_output_key_hash_rcu()
2781 res->fi = NULL; in ip_route_output_key_hash_rcu()
2782 res->table = NULL; in ip_route_output_key_hash_rcu()
2783 if (fl4->flowi4_oif && in ip_route_output_key_hash_rcu()
2784 (ipv4_is_multicast(fl4->daddr) || !fl4->flowi4_l3mdev)) { in ip_route_output_key_hash_rcu()
2790 * even if it has NO routes and NO assigned in ip_route_output_key_hash_rcu()
2796 * and ifaddr state. --ANK in ip_route_output_key_hash_rcu()
2803 if (fl4->saddr == 0) in ip_route_output_key_hash_rcu()
2804 fl4->saddr = inet_select_addr(dev_out, 0, in ip_route_output_key_hash_rcu()
2806 res->type = RTN_UNICAST; in ip_route_output_key_hash_rcu()
2813 if (res->type == RTN_LOCAL) { in ip_route_output_key_hash_rcu()
2814 if (!fl4->saddr) { in ip_route_output_key_hash_rcu()
2815 if (res->fi->fib_prefsrc) in ip_route_output_key_hash_rcu()
2816 fl4->saddr = res->fi->fib_prefsrc; in ip_route_output_key_hash_rcu()
2818 fl4->saddr = fl4->daddr; in ip_route_output_key_hash_rcu()
2823 net->loopback_dev; in ip_route_output_key_hash_rcu()
2830 fl4->flowi4_oif = dev_out->ifindex; in ip_route_output_key_hash_rcu()
2864 struct dst_entry *new = &rt->dst; in ipv4_blackhole_route()
2866 new->__use = 1; in ipv4_blackhole_route()
2867 new->input = dst_discard; in ipv4_blackhole_route()
2868 new->output = dst_discard_out; in ipv4_blackhole_route()
2870 new->dev = net->loopback_dev; in ipv4_blackhole_route()
2871 netdev_hold(new->dev, &new->dev_tracker, GFP_ATOMIC); in ipv4_blackhole_route()
2873 rt->rt_is_input = ort->rt_is_input; in ipv4_blackhole_route()
2874 rt->rt_iif = ort->rt_iif; in ipv4_blackhole_route()
2875 rt->rt_pmtu = ort->rt_pmtu; in ipv4_blackhole_route()
2876 rt->rt_mtu_locked = ort->rt_mtu_locked; in ipv4_blackhole_route()
2878 rt->rt_genid = rt_genid_ipv4(net); in ipv4_blackhole_route()
2879 rt->rt_flags = ort->rt_flags; in ipv4_blackhole_route()
2880 rt->rt_type = ort->rt_type; in ipv4_blackhole_route()
2881 rt->rt_uses_gateway = ort->rt_uses_gateway; in ipv4_blackhole_route()
2882 rt->rt_gw_family = ort->rt_gw_family; in ipv4_blackhole_route()
2883 if (rt->rt_gw_family == AF_INET) in ipv4_blackhole_route()
2884 rt->rt_gw4 = ort->rt_gw4; in ipv4_blackhole_route()
2885 else if (rt->rt_gw_family == AF_INET6) in ipv4_blackhole_route()
2886 rt->rt_gw6 = ort->rt_gw6; in ipv4_blackhole_route()
2891 return rt ? &rt->dst : ERR_PTR(-ENOMEM); in ipv4_blackhole_route()
2902 if (flp4->flowi4_proto) { in ip_route_output_flow()
2903 flp4->flowi4_oif = rt->dst.dev->ifindex; in ip_route_output_flow()
2904 rt = dst_rtable(xfrm_lookup_route(net, &rt->dst, in ip_route_output_flow()
2927 return -EMSGSIZE; in rt_fill_info()
2930 r->rtm_family = AF_INET; in rt_fill_info()
2931 r->rtm_dst_len = 32; in rt_fill_info()
2932 r->rtm_src_len = 0; in rt_fill_info()
2933 r->rtm_tos = inet_dscp_to_dsfield(dscp); in rt_fill_info()
2934 r->rtm_table = table_id < 256 ? table_id : RT_TABLE_COMPAT; in rt_fill_info()
2937 r->rtm_type = rt->rt_type; in rt_fill_info()
2938 r->rtm_scope = RT_SCOPE_UNIVERSE; in rt_fill_info()
2939 r->rtm_protocol = RTPROT_UNSPEC; in rt_fill_info()
2940 r->rtm_flags = (rt->rt_flags & ~0xFFFF) | RTM_F_CLONED; in rt_fill_info()
2941 if (rt->rt_flags & RTCF_NOTIFY) in rt_fill_info()
2942 r->rtm_flags |= RTM_F_NOTIFY; in rt_fill_info()
2943 if (IPCB(skb)->flags & IPSKB_DOREDIRECT) in rt_fill_info()
2944 r->rtm_flags |= RTCF_DOREDIRECT; in rt_fill_info()
2949 r->rtm_src_len = 32; in rt_fill_info()
2953 if (rt->dst.dev && in rt_fill_info()
2954 nla_put_u32(skb, RTA_OIF, rt->dst.dev->ifindex)) in rt_fill_info()
2956 if (rt->dst.lwtstate && in rt_fill_info()
2957 lwtunnel_fill_encap(skb, rt->dst.lwtstate, RTA_ENCAP, RTA_ENCAP_TYPE) < 0) in rt_fill_info()
2960 if (rt->dst.tclassid && in rt_fill_info()
2961 nla_put_u32(skb, RTA_FLOW, rt->dst.tclassid)) in rt_fill_info()
2965 fl4->saddr != src) { in rt_fill_info()
2966 if (nla_put_in_addr(skb, RTA_PREFSRC, fl4->saddr)) in rt_fill_info()
2969 if (rt->rt_uses_gateway) { in rt_fill_info()
2970 if (rt->rt_gw_family == AF_INET && in rt_fill_info()
2971 nla_put_in_addr(skb, RTA_GATEWAY, rt->rt_gw4)) { in rt_fill_info()
2973 } else if (rt->rt_gw_family == AF_INET6) { in rt_fill_info()
2983 via->rtvia_family = AF_INET6; in rt_fill_info()
2984 memcpy(via->rtvia_addr, &rt->rt_gw6, alen); in rt_fill_info()
2988 expires = rt->dst.expires; in rt_fill_info()
2993 expires -= now; in rt_fill_info()
2998 memcpy(metrics, dst_metrics_ptr(&rt->dst), sizeof(metrics)); in rt_fill_info()
2999 if (rt->rt_pmtu && expires) in rt_fill_info()
3000 metrics[RTAX_MTU - 1] = rt->rt_pmtu; in rt_fill_info()
3001 if (rt->rt_mtu_locked && expires) in rt_fill_info()
3002 metrics[RTAX_LOCK - 1] |= BIT(RTAX_MTU); in rt_fill_info()
3007 if (fl4->flowi4_mark && in rt_fill_info()
3008 nla_put_u32(skb, RTA_MARK, fl4->flowi4_mark)) in rt_fill_info()
3011 if (!uid_eq(fl4->flowi4_uid, INVALID_UID) && in rt_fill_info()
3014 fl4->flowi4_uid))) in rt_fill_info()
3023 fl4->saddr, fl4->daddr, in rt_fill_info()
3033 if (nla_put_u32(skb, RTA_IIF, fl4->flowi4_iif)) in rt_fill_info()
3038 error = rt->dst.error; in rt_fill_info()
3040 if (rtnl_put_cacheinfo(skb, &rt->dst, 0, expires, error) < 0) in rt_fill_info()
3048 return -EMSGSIZE; in rt_fill_info()
3062 fnhe = rcu_dereference(fnhe->fnhe_next)) { in fnhe_dump_bucket()
3069 if (fnhe->fnhe_genid != genid) in fnhe_dump_bucket()
3072 if (fnhe->fnhe_expires && in fnhe_dump_bucket()
3073 time_after(jiffies, fnhe->fnhe_expires)) in fnhe_dump_bucket()
3076 rt = rcu_dereference(fnhe->fnhe_rth_input); in fnhe_dump_bucket()
3078 rt = rcu_dereference(fnhe->fnhe_rth_output); in fnhe_dump_bucket()
3082 err = rt_fill_info(net, fnhe->fnhe_daddr, 0, rt, in fnhe_dump_bucket()
3084 NETLINK_CB(cb->skb).portid, in fnhe_dump_bucket()
3085 cb->nlh->nlmsg_seq, flags); in fnhe_dump_bucket()
3100 struct net *net = sock_net(cb->skb->sk); in fib_dump_info_fnhe()
3108 if (nhc->nhc_flags & RTNH_F_DEAD) in fib_dump_info_fnhe()
3112 bucket = rcu_dereference(nhc->nhc_exceptions); in fib_dump_info_fnhe()
3142 skb->protocol = htons(ETH_P_IP); in inet_rtm_getroute_build_skb()
3144 iph->protocol = ip_proto; in inet_rtm_getroute_build_skb()
3145 iph->saddr = src; in inet_rtm_getroute_build_skb()
3146 iph->daddr = dst; in inet_rtm_getroute_build_skb()
3147 iph->version = 0x4; in inet_rtm_getroute_build_skb()
3148 iph->frag_off = 0; in inet_rtm_getroute_build_skb()
3149 iph->ihl = 0x5; in inet_rtm_getroute_build_skb()
3150 skb_set_transport_header(skb, skb->len); in inet_rtm_getroute_build_skb()
3152 switch (iph->protocol) { in inet_rtm_getroute_build_skb()
3157 udph->source = sport; in inet_rtm_getroute_build_skb()
3158 udph->dest = dport; in inet_rtm_getroute_build_skb()
3159 udph->len = htons(sizeof(struct udphdr)); in inet_rtm_getroute_build_skb()
3160 udph->check = 0; in inet_rtm_getroute_build_skb()
3167 tcph->source = sport; in inet_rtm_getroute_build_skb()
3168 tcph->dest = dport; in inet_rtm_getroute_build_skb()
3169 tcph->doff = sizeof(struct tcphdr) / 4; in inet_rtm_getroute_build_skb()
3170 tcph->rst = 1; in inet_rtm_getroute_build_skb()
3171 tcph->check = ~tcp_v4_check(sizeof(struct tcphdr), in inet_rtm_getroute_build_skb()
3179 icmph->type = ICMP_ECHO; in inet_rtm_getroute_build_skb()
3180 icmph->code = 0; in inet_rtm_getroute_build_skb()
3195 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*rtm))) { in inet_rtm_valid_getroute_req()
3198 return -EINVAL; in inet_rtm_valid_getroute_req()
3206 if ((rtm->rtm_src_len && rtm->rtm_src_len != 32) || in inet_rtm_valid_getroute_req()
3207 (rtm->rtm_dst_len && rtm->rtm_dst_len != 32) || in inet_rtm_valid_getroute_req()
3208 rtm->rtm_table || rtm->rtm_protocol || in inet_rtm_valid_getroute_req()
3209 rtm->rtm_scope || rtm->rtm_type) { in inet_rtm_valid_getroute_req()
3211 return -EINVAL; in inet_rtm_valid_getroute_req()
3214 if (rtm->rtm_flags & ~(RTM_F_NOTIFY | in inet_rtm_valid_getroute_req()
3218 return -EINVAL; in inet_rtm_valid_getroute_req()
3226 if ((tb[RTA_SRC] && !rtm->rtm_src_len) || in inet_rtm_valid_getroute_req()
3227 (tb[RTA_DST] && !rtm->rtm_dst_len)) { in inet_rtm_valid_getroute_req()
3229 return -EINVAL; in inet_rtm_valid_getroute_req()
3249 return -EINVAL; in inet_rtm_valid_getroute_req()
3259 struct net *net = sock_net(in_skb->sk); in inet_rtm_getroute()
3305 return -ENOBUFS; in inet_rtm_getroute()
3309 fl4.flowi4_tos = rtm->rtm_tos & INET_DSCP_MASK; in inet_rtm_getroute()
3326 err = -ENODEV; in inet_rtm_getroute()
3331 skb->dev = dev; in inet_rtm_getroute()
3332 skb->mark = mark; in inet_rtm_getroute()
3334 inet_dsfield_to_dscp(rtm->rtm_tos), in inet_rtm_getroute()
3335 dev, &res) ? -EINVAL : 0; in inet_rtm_getroute()
3338 if (err == 0 && rt->dst.error) in inet_rtm_getroute()
3339 err = -rt->dst.error; in inet_rtm_getroute()
3342 skb->dev = net->loopback_dev; in inet_rtm_getroute()
3348 skb_dst_set(skb, &rt->dst); in inet_rtm_getroute()
3354 if (rtm->rtm_flags & RTM_F_NOTIFY) in inet_rtm_getroute()
3355 rt->rt_flags |= RTCF_NOTIFY; in inet_rtm_getroute()
3357 if (rtm->rtm_flags & RTM_F_LOOKUP_TABLE) in inet_rtm_getroute()
3358 table_id = res.table ? res.table->tb_id : 0; in inet_rtm_getroute()
3366 if (rtm->rtm_flags & RTM_F_FIB_MATCH) { in inet_rtm_getroute()
3372 err = -EHOSTUNREACH; in inet_rtm_getroute()
3380 fri.type = rt->rt_type; in inet_rtm_getroute()
3388 u8 slen = 32 - fri.dst_len; in inet_rtm_getroute()
3390 if (fa->fa_slen == slen && in inet_rtm_getroute()
3391 fa->tb_id == fri.tb_id && in inet_rtm_getroute()
3392 fa->fa_dscp == fri.dscp && in inet_rtm_getroute()
3393 fa->fa_info == res.fi && in inet_rtm_getroute()
3394 fa->fa_type == fri.type) { in inet_rtm_getroute()
3395 fri.offload = READ_ONCE(fa->offload); in inet_rtm_getroute()
3396 fri.trap = READ_ONCE(fa->trap); in inet_rtm_getroute()
3398 READ_ONCE(fa->offload_failed); in inet_rtm_getroute()
3404 nlh->nlmsg_seq, RTM_NEWROUTE, &fri, 0); in inet_rtm_getroute()
3408 nlh->nlmsg_seq, 0); in inet_rtm_getroute()
3427 rt_cache_flush(dev_net(in_dev->dev)); in ip_rt_multicast_event()
3439 struct net *net = (struct net *)__ctl->extra1; in ipv4_sysctl_rtcache_flush()
3447 return -EINVAL; in ipv4_sysctl_rtcache_flush()
3585 /* Don't export non-whitelisted sysctls to unprivileged users */ in sysctl_route_net_init()
3586 if (net->user_ns != &init_user_ns) { in sysctl_route_net_init()
3595 tbl[i].data += (void *)net - (void *)&init_net; in sysctl_route_net_init()
3599 net->ipv4.route_hdr = register_net_sysctl_sz(net, "net/ipv4/route", in sysctl_route_net_init()
3601 if (!net->ipv4.route_hdr) in sysctl_route_net_init()
3609 return -ENOMEM; in sysctl_route_net_init()
3616 tbl = net->ipv4.route_hdr->ctl_table_arg; in sysctl_route_net_exit()
3617 unregister_net_sysctl_table(net->ipv4.route_hdr); in sysctl_route_net_exit()
3631 net->ipv4.ip_rt_min_pmtu = DEFAULT_MIN_PMTU; in netns_ip_rt_init()
3632 net->ipv4.ip_rt_mtu_expires = DEFAULT_MTU_EXPIRES; in netns_ip_rt_init()
3633 net->ipv4.ip_rt_min_advmss = DEFAULT_MIN_ADVMSS; in netns_ip_rt_init()
3643 atomic_set(&net->ipv4.rt_genid, 0); in rt_genid_init()
3644 atomic_set(&net->fnhe_genid, 0); in rt_genid_init()
3645 atomic_set(&net->ipv4.dev_addr_genid, get_random_u32()); in rt_genid_init()
3658 return -ENOMEM; in ipv4_inetpeer_init()
3660 net->ipv4.peers = bp; in ipv4_inetpeer_init()
3666 struct inet_peer_base *bp = net->ipv4.peers; in ipv4_inetpeer_exit()
3668 net->ipv4.peers = NULL; in ipv4_inetpeer_exit()
3712 INIT_LIST_HEAD(&ul->head); in ip_rt_init()
3713 spin_lock_init(&ul->lock); in ip_rt_init()