Lines Matching +full:use +full:- +full:rtm
1 // SPDX-License-Identifier: GPL-2.0-or-later
7 * ROUTE - implementation of the IP router.
34 * Alan Cox : Use __u32 properly
48 * Andi Kleen : Load-limit warning messages.
117 ((oldflp4)->flowi4_tos & (IPTOS_RT_MASK | RTO_ONLINK))
223 seq_printf(seq, "%-127s\n", in rt_cache_seq_show()
257 for (cpu = *pos-1; cpu < nr_cpu_ids; ++cpu) { in rt_cpu_seq_start()
298 0, /* st->in_hit */ in rt_cpu_seq_show()
299 st->in_slow_tot, in rt_cpu_seq_show()
300 st->in_slow_mc, in rt_cpu_seq_show()
301 st->in_no_route, in rt_cpu_seq_show()
302 st->in_brd, in rt_cpu_seq_show()
303 st->in_martian_dst, in rt_cpu_seq_show()
304 st->in_martian_src, in rt_cpu_seq_show()
306 0, /* st->out_hit */ in rt_cpu_seq_show()
307 st->out_slow_tot, in rt_cpu_seq_show()
308 st->out_slow_mc, in rt_cpu_seq_show()
310 0, /* st->gc_total */ in rt_cpu_seq_show()
311 0, /* st->gc_ignored */ in rt_cpu_seq_show()
312 0, /* st->gc_goal_miss */ in rt_cpu_seq_show()
313 0, /* st->gc_dst_overflow */ in rt_cpu_seq_show()
314 0, /* st->in_hlist_search */ in rt_cpu_seq_show()
315 0 /* st->out_hlist_search */ in rt_cpu_seq_show()
348 return -ENOMEM; in rt_acct_proc_show()
370 pde = proc_create("rt_cache", 0444, net->proc_net, in ip_rt_do_proc_init()
376 net->proc_net_stat, &rt_cpu_proc_ops); in ip_rt_do_proc_init()
381 pde = proc_create_single("rt_acct", 0, net->proc_net, in ip_rt_do_proc_init()
390 remove_proc_entry("rt_cache", net->proc_net_stat); in ip_rt_do_proc_init()
393 remove_proc_entry("rt_cache", net->proc_net); in ip_rt_do_proc_init()
395 return -ENOMEM; in ip_rt_do_proc_init()
400 remove_proc_entry("rt_cache", net->proc_net_stat); in ip_rt_do_proc_exit()
401 remove_proc_entry("rt_cache", net->proc_net); in ip_rt_do_proc_exit()
403 remove_proc_entry("rt_acct", net->proc_net); in ip_rt_do_proc_exit()
426 return rth->rt_genid != rt_genid_ipv4(dev_net(rth->dst.dev)); in rt_is_expired()
439 struct net_device *dev = dst->dev; in ipv4_neigh_lookup()
444 if (likely(rt->rt_gw_family == AF_INET)) { in ipv4_neigh_lookup()
445 n = ip_neigh_gw4(dev, rt->rt_gw4); in ipv4_neigh_lookup()
446 } else if (rt->rt_gw_family == AF_INET6) { in ipv4_neigh_lookup()
447 n = ip_neigh_gw6(dev, &rt->rt_gw6); in ipv4_neigh_lookup()
451 pkey = skb ? ip_hdr(skb)->daddr : *((__be32 *) daddr); in ipv4_neigh_lookup()
455 if (!IS_ERR(n) && !refcount_inc_not_zero(&n->refcnt)) in ipv4_neigh_lookup()
466 struct net_device *dev = dst->dev; in ipv4_confirm_neigh()
469 if (rt->rt_gw_family == AF_INET) { in ipv4_confirm_neigh()
470 pkey = (const __be32 *)&rt->rt_gw4; in ipv4_confirm_neigh()
471 } else if (rt->rt_gw_family == AF_INET6) { in ipv4_confirm_neigh()
472 return __ipv6_confirm_neigh_stub(dev, &rt->rt_gw6); in ipv4_confirm_neigh()
474 (rt->rt_flags & in ipv4_confirm_neigh()
505 delta = prandom_u32_max(now - old); in ip_idents_reserve()
508 * supports -fno-strict-overflow before reporting it that was a bug in ip_idents_reserve()
509 * in UBSAN, and it has been fixed in GCC-8. in ip_idents_reserve()
511 return atomic_add_return(segs + delta, p_id) - segs; in ip_idents_reserve()
520 if (unlikely(siphash_key_is_zero(&net->ipv4.ip_id_key))) in __ip_select_ident()
521 get_random_bytes(&net->ipv4.ip_id_key, in __ip_select_ident()
522 sizeof(net->ipv4.ip_id_key)); in __ip_select_ident()
524 hash = siphash_3u32((__force u32)iph->daddr, in __ip_select_ident()
525 (__force u32)iph->saddr, in __ip_select_ident()
526 iph->protocol, in __ip_select_ident()
527 &net->ipv4.ip_id_key); in __ip_select_ident()
529 iph->id = htons(id); in __ip_select_ident()
537 fl4->flowi4_tos = tos & IPTOS_RT_MASK; in ip_rt_fix_tos()
538 fl4->flowi4_scope = tos & RTO_ONLINK ? in ip_rt_fix_tos()
551 oif = sk->sk_bound_dev_if; in __build_flow_key()
552 mark = sk->sk_mark; in __build_flow_key()
554 prot = inet->hdrincl ? IPPROTO_RAW : sk->sk_protocol; in __build_flow_key()
559 iph->daddr, iph->saddr, 0, 0, in __build_flow_key()
566 const struct net *net = dev_net(skb->dev); in build_skb_flow_key()
568 int oif = skb->dev->ifindex; in build_skb_flow_key()
569 u8 tos = RT_TOS(iph->tos); in build_skb_flow_key()
570 u8 prot = iph->protocol; in build_skb_flow_key()
571 u32 mark = skb->mark; in build_skb_flow_key()
580 __be32 daddr = inet->inet_daddr; in build_sk_flow_key()
583 inet_opt = rcu_dereference(inet->inet_opt); in build_sk_flow_key()
584 if (inet_opt && inet_opt->opt.srr) in build_sk_flow_key()
585 daddr = inet_opt->opt.faddr; in build_sk_flow_key()
586 flowi4_init_output(fl4, sk->sk_bound_dev_if, sk->sk_mark, in build_sk_flow_key()
588 inet->hdrincl ? IPPROTO_RAW : sk->sk_protocol, in build_sk_flow_key()
590 daddr, inet->inet_saddr, 0, 0, sk->sk_uid); in build_sk_flow_key()
609 rt = rcu_dereference(fnhe->fnhe_rth_input); in fnhe_flush_routes()
611 RCU_INIT_POINTER(fnhe->fnhe_rth_input, NULL); in fnhe_flush_routes()
612 dst_dev_put(&rt->dst); in fnhe_flush_routes()
613 dst_release(&rt->dst); in fnhe_flush_routes()
615 rt = rcu_dereference(fnhe->fnhe_rth_output); in fnhe_flush_routes()
617 RCU_INIT_POINTER(fnhe->fnhe_rth_output, NULL); in fnhe_flush_routes()
618 dst_dev_put(&rt->dst); in fnhe_flush_routes()
619 dst_release(&rt->dst); in fnhe_flush_routes()
628 for (fnhe_p = &hash->chain; ; fnhe_p = &fnhe->fnhe_next) { in fnhe_remove_oldest()
634 time_before(fnhe->fnhe_stamp, oldest->fnhe_stamp)) { in fnhe_remove_oldest()
640 *oldest_p = oldest->fnhe_next; in fnhe_remove_oldest()
656 rt->rt_pmtu = fnhe->fnhe_pmtu; in fill_route_from_fnhe()
657 rt->rt_mtu_locked = fnhe->fnhe_mtu_locked; in fill_route_from_fnhe()
658 rt->dst.expires = fnhe->fnhe_expires; in fill_route_from_fnhe()
660 if (fnhe->fnhe_gw) { in fill_route_from_fnhe()
661 rt->rt_flags |= RTCF_REDIRECTED; in fill_route_from_fnhe()
662 rt->rt_uses_gateway = 1; in fill_route_from_fnhe()
663 rt->rt_gw_family = AF_INET; in fill_route_from_fnhe()
664 rt->rt_gw4 = fnhe->fnhe_gw; in fill_route_from_fnhe()
679 genid = fnhe_genid(dev_net(nhc->nhc_dev)); in update_or_create_fnhe()
684 hash = rcu_dereference(nhc->nhc_exceptions); in update_or_create_fnhe()
689 rcu_assign_pointer(nhc->nhc_exceptions, hash); in update_or_create_fnhe()
695 for (fnhe = rcu_dereference(hash->chain); fnhe; in update_or_create_fnhe()
696 fnhe = rcu_dereference(fnhe->fnhe_next)) { in update_or_create_fnhe()
697 if (fnhe->fnhe_daddr == daddr) in update_or_create_fnhe()
703 if (fnhe->fnhe_genid != genid) in update_or_create_fnhe()
704 fnhe->fnhe_genid = genid; in update_or_create_fnhe()
706 fnhe->fnhe_gw = gw; in update_or_create_fnhe()
708 fnhe->fnhe_pmtu = pmtu; in update_or_create_fnhe()
709 fnhe->fnhe_mtu_locked = lock; in update_or_create_fnhe()
711 fnhe->fnhe_expires = max(1UL, expires); in update_or_create_fnhe()
713 rt = rcu_dereference(fnhe->fnhe_rth_input); in update_or_create_fnhe()
716 rt = rcu_dereference(fnhe->fnhe_rth_output); in update_or_create_fnhe()
726 depth--; in update_or_create_fnhe()
733 fnhe->fnhe_next = hash->chain; in update_or_create_fnhe()
735 fnhe->fnhe_genid = genid; in update_or_create_fnhe()
736 fnhe->fnhe_daddr = daddr; in update_or_create_fnhe()
737 fnhe->fnhe_gw = gw; in update_or_create_fnhe()
738 fnhe->fnhe_pmtu = pmtu; in update_or_create_fnhe()
739 fnhe->fnhe_mtu_locked = lock; in update_or_create_fnhe()
740 fnhe->fnhe_expires = max(1UL, expires); in update_or_create_fnhe()
742 rcu_assign_pointer(hash->chain, fnhe); in update_or_create_fnhe()
748 rt = rcu_dereference(nhc->nhc_rth_input); in update_or_create_fnhe()
750 rt->dst.obsolete = DST_OBSOLETE_KILL; in update_or_create_fnhe()
754 prt = per_cpu_ptr(nhc->nhc_pcpu_rth_output, i); in update_or_create_fnhe()
757 rt->dst.obsolete = DST_OBSOLETE_KILL; in update_or_create_fnhe()
761 fnhe->fnhe_stamp = jiffies; in update_or_create_fnhe()
770 __be32 new_gw = icmp_hdr(skb)->un.gateway; in __ip_do_redirect()
771 __be32 old_gw = ip_hdr(skb)->saddr; in __ip_do_redirect()
772 struct net_device *dev = skb->dev; in __ip_do_redirect()
778 switch (icmp_hdr(skb)->code & 7) { in __ip_do_redirect()
789 if (rt->rt_gw_family != AF_INET || rt->rt_gw4 != old_gw) in __ip_do_redirect()
812 n = __ipv4_neigh_lookup(rt->dst.dev, (__force u32)new_gw); in __ip_do_redirect()
814 n = neigh_create(&arp_tbl, &new_gw, rt->dst.dev); in __ip_do_redirect()
816 if (!(n->nud_state & NUD_VALID)) { in __ip_do_redirect()
824 update_or_create_fnhe(nhc, fl4->daddr, new_gw, in __ip_do_redirect()
829 rt->dst.obsolete = DST_OBSOLETE_KILL; in __ip_do_redirect()
839 const struct iphdr *iph = (const struct iphdr *) skb->data; in __ip_do_redirect()
840 __be32 daddr = iph->daddr; in __ip_do_redirect()
841 __be32 saddr = iph->saddr; in __ip_do_redirect()
844 " Advised path = %pI4 -> %pI4\n", in __ip_do_redirect()
845 &old_gw, dev->name, &new_gw, in __ip_do_redirect()
856 const struct iphdr *iph = (const struct iphdr *) skb->data; in ip_do_redirect()
857 struct net *net = dev_net(skb->dev); in ip_do_redirect()
858 int oif = skb->dev->ifindex; in ip_do_redirect()
859 u8 tos = RT_TOS(iph->tos); in ip_do_redirect()
860 u8 prot = iph->protocol; in ip_do_redirect()
861 u32 mark = skb->mark; in ip_do_redirect()
875 if ((dst->obsolete > 0) || in ipv4_negative_advice()
876 (rt->rt_flags & RTCF_REDIRECTED) || in ipv4_negative_advice()
877 rt->dst.expires) in ipv4_negative_advice()
907 in_dev = __in_dev_get_rcu(rt->dst.dev); in ip_rt_send_redirect()
913 vif = l3mdev_master_ifindex_rcu(rt->dst.dev); in ip_rt_send_redirect()
916 net = dev_net(rt->dst.dev); in ip_rt_send_redirect()
917 peer = inet_getpeer_v4(net->ipv4.peers, ip_hdr(skb)->saddr, vif, 1); in ip_rt_send_redirect()
920 rt_nexthop(rt, ip_hdr(skb)->daddr)); in ip_rt_send_redirect()
927 if (time_after(jiffies, peer->rate_last + ip_rt_redirect_silence)) { in ip_rt_send_redirect()
928 peer->rate_tokens = 0; in ip_rt_send_redirect()
929 peer->n_redirects = 0; in ip_rt_send_redirect()
935 if (peer->n_redirects >= ip_rt_redirect_number) { in ip_rt_send_redirect()
936 peer->rate_last = jiffies; in ip_rt_send_redirect()
943 if (peer->n_redirects == 0 || in ip_rt_send_redirect()
945 (peer->rate_last + in ip_rt_send_redirect()
946 (ip_rt_redirect_load << peer->n_redirects)))) { in ip_rt_send_redirect()
947 __be32 gw = rt_nexthop(rt, ip_hdr(skb)->daddr); in ip_rt_send_redirect()
950 peer->rate_last = jiffies; in ip_rt_send_redirect()
951 ++peer->n_redirects; in ip_rt_send_redirect()
954 peer->n_redirects == ip_rt_redirect_number) in ip_rt_send_redirect()
956 &ip_hdr(skb)->saddr, inet_iif(skb), in ip_rt_send_redirect()
957 &ip_hdr(skb)->daddr, &gw); in ip_rt_send_redirect()
967 struct net_device *dev = skb->dev; in ip_error()
975 if (netif_is_l3_master(skb->dev)) { in ip_error()
976 dev = __dev_get_by_index(dev_net(skb->dev), IPCB(skb)->iif); in ip_error()
987 net = dev_net(rt->dst.dev); in ip_error()
989 switch (rt->dst.error) { in ip_error()
1001 switch (rt->dst.error) { in ip_error()
1017 peer = inet_getpeer_v4(net->ipv4.peers, ip_hdr(skb)->saddr, in ip_error()
1018 l3mdev_master_ifindex(skb->dev), 1); in ip_error()
1023 peer->rate_tokens += now - peer->rate_last; in ip_error()
1024 if (peer->rate_tokens > ip_rt_error_burst) in ip_error()
1025 peer->rate_tokens = ip_rt_error_burst; in ip_error()
1026 peer->rate_last = now; in ip_error()
1027 if (peer->rate_tokens >= ip_rt_error_cost) in ip_error()
1028 peer->rate_tokens -= ip_rt_error_cost; in ip_error()
1042 struct dst_entry *dst = &rt->dst; in __ip_rt_update_pmtu()
1043 struct net *net = dev_net(dst->dev); in __ip_rt_update_pmtu()
1060 if (rt->rt_pmtu == mtu && !lock && in __ip_rt_update_pmtu()
1061 time_before(jiffies, dst->expires - ip_rt_mtu_expires / 2)) in __ip_rt_update_pmtu()
1070 update_or_create_fnhe(nhc, fl4->daddr, 0, mtu, lock, in __ip_rt_update_pmtu()
1087 if (skb && netif_is_any_bridge_port(skb->dev)) in ip_rt_update_pmtu()
1096 const struct iphdr *iph = (const struct iphdr *)skb->data; in ipv4_update_pmtu()
1099 u32 mark = IP4_REPLY_MARK(net, skb->mark); in ipv4_update_pmtu()
1102 RT_TOS(iph->tos), protocol, mark, 0); in ipv4_update_pmtu()
1113 const struct iphdr *iph = (const struct iphdr *)skb->data; in __ipv4_sk_update_pmtu()
1120 fl4.flowi4_mark = IP4_REPLY_MARK(sock_net(sk), skb->mark); in __ipv4_sk_update_pmtu()
1131 const struct iphdr *iph = (const struct iphdr *)skb->data; in ipv4_sk_update_pmtu()
1153 if (odst->obsolete && !odst->ops->check(odst, 0)) { in ipv4_sk_update_pmtu()
1163 __ip_rt_update_pmtu((struct rtable *)xfrm_dst_path(&rt->dst), &fl4, mtu); in ipv4_sk_update_pmtu()
1165 if (!dst_check(&rt->dst, 0)) { in ipv4_sk_update_pmtu()
1167 dst_release(&rt->dst); in ipv4_sk_update_pmtu()
1177 sk_dst_set(sk, &rt->dst); in ipv4_sk_update_pmtu()
1188 const struct iphdr *iph = (const struct iphdr *)skb->data; in ipv4_redirect()
1193 RT_TOS(iph->tos), protocol, 0, 0); in ipv4_redirect()
1204 const struct iphdr *iph = (const struct iphdr *)skb->data; in ipv4_sk_redirect()
1222 /* All IPV4 dsts are created with ->obsolete set to the value in ipv4_dst_check()
1230 if (dst->obsolete != DST_OBSOLETE_FORCE_CHK || rt_is_expired(rt)) in ipv4_dst_check()
1245 ip_hdr(skb)->version != 4 || ip_hdr(skb)->ihl < 5) in ipv4_send_dest_unreach()
1249 if (ip_hdr(skb)->ihl > 5) { in ipv4_send_dest_unreach()
1250 if (!pskb_network_may_pull(skb, ip_hdr(skb)->ihl * 4)) in ipv4_send_dest_unreach()
1252 opt.optlen = ip_hdr(skb)->ihl * 4 - sizeof(struct iphdr); in ipv4_send_dest_unreach()
1255 dev = skb->dev ? skb->dev : skb_rtable(skb)->dst.dev; in ipv4_send_dest_unreach()
1273 dst_set_expires(&rt->dst, 0); in ipv4_link_failure()
1278 pr_debug("%s: %pI4 -> %pI4, %s\n", in ip_rt_bug()
1279 __func__, &ip_hdr(skb)->saddr, &ip_hdr(skb)->daddr, in ip_rt_bug()
1280 skb->dev ? skb->dev->name : "?"); in ip_rt_bug()
1300 src = ip_hdr(skb)->saddr; in ip_rt_get_source()
1305 .daddr = iph->daddr, in ip_rt_get_source()
1306 .saddr = iph->saddr, in ip_rt_get_source()
1307 .flowi4_tos = RT_TOS(iph->tos), in ip_rt_get_source()
1308 .flowi4_oif = rt->dst.dev->ifindex, in ip_rt_get_source()
1309 .flowi4_iif = skb->dev->ifindex, in ip_rt_get_source()
1310 .flowi4_mark = skb->mark, in ip_rt_get_source()
1314 if (fib_lookup(dev_net(rt->dst.dev), &fl4, &res, 0) == 0) in ip_rt_get_source()
1315 src = fib_result_prefsrc(dev_net(rt->dst.dev), &res); in ip_rt_get_source()
1317 src = inet_select_addr(rt->dst.dev, in ip_rt_get_source()
1318 rt_nexthop(rt, iph->daddr), in ip_rt_get_source()
1328 if (!(rt->dst.tclassid & 0xFFFF)) in set_class_tag()
1329 rt->dst.tclassid |= tag & 0xFFFF; in set_class_tag()
1330 if (!(rt->dst.tclassid & 0xFFFF0000)) in set_class_tag()
1331 rt->dst.tclassid |= tag & 0xFFFF0000; in set_class_tag()
1338 unsigned int advmss = max_t(unsigned int, ipv4_mtu(dst) - header_size, in ipv4_default_advmss()
1341 return min(advmss, IPV4_MAX_PMTU - header_size); in ipv4_default_advmss()
1347 unsigned int mtu = rt->rt_pmtu; in ipv4_mtu()
1349 if (!mtu || time_after_eq(jiffies, rt->dst.expires)) in ipv4_mtu()
1355 mtu = READ_ONCE(dst->dev->mtu); in ipv4_mtu()
1358 if (rt->rt_uses_gateway && mtu > 576) in ipv4_mtu()
1365 return mtu - lwtunnel_headroom(dst->lwtstate, mtu); in ipv4_mtu()
1376 hash = rcu_dereference_protected(nhc->nhc_exceptions, in ip_del_fnhe()
1380 fnhe_p = &hash->chain; in ip_del_fnhe()
1383 if (fnhe->fnhe_daddr == daddr) { in ip_del_fnhe()
1385 fnhe->fnhe_next, lockdep_is_held(&fnhe_lock))); in ip_del_fnhe()
1389 fnhe->fnhe_daddr = 0; in ip_del_fnhe()
1394 fnhe_p = &fnhe->fnhe_next; in ip_del_fnhe()
1395 fnhe = rcu_dereference_protected(fnhe->fnhe_next, in ip_del_fnhe()
1405 struct fnhe_hash_bucket *hash = rcu_dereference(nhc->nhc_exceptions); in find_exception()
1415 fnhe = rcu_dereference(fnhe->fnhe_next)) { in find_exception()
1416 if (fnhe->fnhe_daddr == daddr) { in find_exception()
1417 if (fnhe->fnhe_expires && in find_exception()
1418 time_after(jiffies, fnhe->fnhe_expires)) { in find_exception()
1429 * 1. mtu on route is locked - use it
1436 struct fib_nh_common *nhc = res->nhc; in ip_mtu_from_fib_result()
1437 struct net_device *dev = nhc->nhc_dev; in ip_mtu_from_fib_result()
1438 struct fib_info *fi = res->fi; in ip_mtu_from_fib_result()
1441 if (READ_ONCE(dev_net(dev)->ipv4.sysctl_ip_fwd_use_pmtu) || in ip_mtu_from_fib_result()
1442 fi->fib_metrics->metrics[RTAX_LOCK - 1] & (1 << RTAX_MTU)) in ip_mtu_from_fib_result()
1443 mtu = fi->fib_mtu; in ip_mtu_from_fib_result()
1449 if (fnhe && !time_after_eq(jiffies, fnhe->fnhe_expires)) in ip_mtu_from_fib_result()
1450 mtu = fnhe->fnhe_pmtu; in ip_mtu_from_fib_result()
1454 mtu = min(READ_ONCE(dev->mtu), IP_MAX_MTU); in ip_mtu_from_fib_result()
1456 return mtu - lwtunnel_headroom(nhc->nhc_lwtstate, mtu); in ip_mtu_from_fib_result()
1466 if (daddr == fnhe->fnhe_daddr) { in rt_bind_exception()
1469 int genid = fnhe_genid(dev_net(rt->dst.dev)); in rt_bind_exception()
1472 porig = &fnhe->fnhe_rth_input; in rt_bind_exception()
1474 porig = &fnhe->fnhe_rth_output; in rt_bind_exception()
1477 if (fnhe->fnhe_genid != genid) { in rt_bind_exception()
1478 fnhe->fnhe_genid = genid; in rt_bind_exception()
1479 fnhe->fnhe_gw = 0; in rt_bind_exception()
1480 fnhe->fnhe_pmtu = 0; in rt_bind_exception()
1481 fnhe->fnhe_expires = 0; in rt_bind_exception()
1482 fnhe->fnhe_mtu_locked = false; in rt_bind_exception()
1487 if (!rt->rt_gw4) { in rt_bind_exception()
1488 rt->rt_gw4 = daddr; in rt_bind_exception()
1489 rt->rt_gw_family = AF_INET; in rt_bind_exception()
1493 dst_hold(&rt->dst); in rt_bind_exception()
1496 dst_dev_put(&orig->dst); in rt_bind_exception()
1497 dst_release(&orig->dst); in rt_bind_exception()
1502 fnhe->fnhe_stamp = jiffies; in rt_bind_exception()
1515 p = (struct rtable **)&nhc->nhc_rth_input; in rt_cache_route()
1517 p = (struct rtable **)raw_cpu_ptr(nhc->nhc_pcpu_rth_output); in rt_cache_route()
1524 dst_hold(&rt->dst); in rt_cache_route()
1529 dst_release(&orig->dst); in rt_cache_route()
1532 dst_release(&rt->dst); in rt_cache_route()
1550 rt->rt_uncached_list = ul; in rt_add_uncached_list()
1552 spin_lock_bh(&ul->lock); in rt_add_uncached_list()
1553 list_add_tail(&rt->rt_uncached, &ul->head); in rt_add_uncached_list()
1554 spin_unlock_bh(&ul->lock); in rt_add_uncached_list()
1559 if (!list_empty(&rt->rt_uncached)) { in rt_del_uncached_list()
1560 struct uncached_list *ul = rt->rt_uncached_list; in rt_del_uncached_list()
1562 spin_lock_bh(&ul->lock); in rt_del_uncached_list()
1563 list_del(&rt->rt_uncached); in rt_del_uncached_list()
1564 spin_unlock_bh(&ul->lock); in rt_del_uncached_list()
1584 spin_lock_bh(&ul->lock); in rt_flush_dev()
1585 list_for_each_entry(rt, &ul->head, rt_uncached) { in rt_flush_dev()
1586 if (rt->dst.dev != dev) in rt_flush_dev()
1588 rt->dst.dev = blackhole_netdev; in rt_flush_dev()
1589 dev_hold(rt->dst.dev); in rt_flush_dev()
1592 spin_unlock_bh(&ul->lock); in rt_flush_dev()
1599 rt->dst.obsolete == DST_OBSOLETE_FORCE_CHK && in rt_cache_valid()
1614 if (nhc->nhc_gw_family && nhc->nhc_scope == RT_SCOPE_LINK) { in rt_set_nexthop()
1615 rt->rt_uses_gateway = 1; in rt_set_nexthop()
1616 rt->rt_gw_family = nhc->nhc_gw_family; in rt_set_nexthop()
1618 if (likely(nhc->nhc_gw_family == AF_INET)) in rt_set_nexthop()
1619 rt->rt_gw4 = nhc->nhc_gw.ipv4; in rt_set_nexthop()
1621 rt->rt_gw6 = nhc->nhc_gw.ipv6; in rt_set_nexthop()
1624 ip_dst_init_metrics(&rt->dst, fi->fib_metrics); in rt_set_nexthop()
1627 if (nhc->nhc_family == AF_INET) { in rt_set_nexthop()
1631 rt->dst.tclassid = nh->nh_tclassid; in rt_set_nexthop()
1634 rt->dst.lwtstate = lwtstate_get(nhc->nhc_lwtstate); in rt_set_nexthop()
1645 if (!rt->rt_gw4) { in rt_set_nexthop()
1646 rt->rt_gw_family = AF_INET; in rt_set_nexthop()
1647 rt->rt_gw4 = daddr; in rt_set_nexthop()
1656 set_class_tag(rt, res->tclassid); in rt_set_nexthop()
1673 rt->rt_genid = rt_genid_ipv4(dev_net(dev)); in rt_dst_alloc()
1674 rt->rt_flags = flags; in rt_dst_alloc()
1675 rt->rt_type = type; in rt_dst_alloc()
1676 rt->rt_is_input = 0; in rt_dst_alloc()
1677 rt->rt_iif = 0; in rt_dst_alloc()
1678 rt->rt_pmtu = 0; in rt_dst_alloc()
1679 rt->rt_mtu_locked = 0; in rt_dst_alloc()
1680 rt->rt_uses_gateway = 0; in rt_dst_alloc()
1681 rt->rt_gw_family = 0; in rt_dst_alloc()
1682 rt->rt_gw4 = 0; in rt_dst_alloc()
1683 INIT_LIST_HEAD(&rt->rt_uncached); in rt_dst_alloc()
1685 rt->dst.output = ip_output; in rt_dst_alloc()
1687 rt->dst.input = ip_local_deliver; in rt_dst_alloc()
1699 rt->dst.flags); in rt_dst_clone()
1702 new_rt->rt_genid = rt_genid_ipv4(dev_net(dev)); in rt_dst_clone()
1703 new_rt->rt_flags = rt->rt_flags; in rt_dst_clone()
1704 new_rt->rt_type = rt->rt_type; in rt_dst_clone()
1705 new_rt->rt_is_input = rt->rt_is_input; in rt_dst_clone()
1706 new_rt->rt_iif = rt->rt_iif; in rt_dst_clone()
1707 new_rt->rt_pmtu = rt->rt_pmtu; in rt_dst_clone()
1708 new_rt->rt_mtu_locked = rt->rt_mtu_locked; in rt_dst_clone()
1709 new_rt->rt_gw_family = rt->rt_gw_family; in rt_dst_clone()
1710 if (rt->rt_gw_family == AF_INET) in rt_dst_clone()
1711 new_rt->rt_gw4 = rt->rt_gw4; in rt_dst_clone()
1712 else if (rt->rt_gw_family == AF_INET6) in rt_dst_clone()
1713 new_rt->rt_gw6 = rt->rt_gw6; in rt_dst_clone()
1714 INIT_LIST_HEAD(&new_rt->rt_uncached); in rt_dst_clone()
1716 new_rt->dst.input = rt->dst.input; in rt_dst_clone()
1717 new_rt->dst.output = rt->dst.output; in rt_dst_clone()
1718 new_rt->dst.error = rt->dst.error; in rt_dst_clone()
1719 new_rt->dst.lastuse = jiffies; in rt_dst_clone()
1720 new_rt->dst.lwtstate = lwtstate_get(rt->dst.lwtstate); in rt_dst_clone()
1735 return -EINVAL; in ip_mc_validate_source()
1738 skb->protocol != htons(ETH_P_IP)) in ip_mc_validate_source()
1739 return -EINVAL; in ip_mc_validate_source()
1742 return -EINVAL; in ip_mc_validate_source()
1746 ip_hdr(skb)->protocol != IPPROTO_IGMP) in ip_mc_validate_source()
1747 return -EINVAL; in ip_mc_validate_source()
1777 IPCB(skb)->flags |= IPSKB_NOPOLICY; in ip_route_input_mc()
1779 rth = rt_dst_alloc(dev_net(dev)->loopback_dev, flags, RTN_MULTICAST, in ip_route_input_mc()
1782 return -ENOBUFS; in ip_route_input_mc()
1785 rth->dst.tclassid = itag; in ip_route_input_mc()
1787 rth->dst.output = ip_rt_bug; in ip_route_input_mc()
1788 rth->rt_is_input= 1; in ip_route_input_mc()
1792 rth->dst.input = ip_mr_input; in ip_route_input_mc()
1797 skb_dst_set(skb, &rth->dst); in ip_route_input_mc()
1816 &daddr, &saddr, dev->name); in ip_handle_martian_source()
1817 if (dev->hard_header_len && skb_mac_header_was_set(skb)) { in ip_handle_martian_source()
1821 dev->hard_header_len, false); in ip_handle_martian_source()
1834 struct net_device *dev = nhc->nhc_dev; in __mkroute_input()
1846 return -EINVAL; in __mkroute_input()
1850 in_dev->dev, in_dev, &itag); in __mkroute_input()
1852 ip_handle_martian_source(in_dev->dev, in_dev, skb, daddr, in __mkroute_input()
1858 do_cache = res->fi && !itag; in __mkroute_input()
1860 skb->protocol == htons(ETH_P_IP)) { in __mkroute_input()
1863 gw = nhc->nhc_gw_family == AF_INET ? nhc->nhc_gw.ipv4 : 0; in __mkroute_input()
1866 IPCB(skb)->flags |= IPSKB_DOREDIRECT; in __mkroute_input()
1869 if (skb->protocol != htons(ETH_P_IP)) { in __mkroute_input()
1879 err = -EINVAL; in __mkroute_input()
1886 IPCB(skb)->flags |= IPSKB_NOPOLICY; in __mkroute_input()
1891 rth = rcu_dereference(fnhe->fnhe_rth_input); in __mkroute_input()
1893 rth = rcu_dereference(nhc->nhc_rth_input); in __mkroute_input()
1895 skb_dst_set_noref(skb, &rth->dst); in __mkroute_input()
1900 rth = rt_dst_alloc(out_dev->dev, 0, res->type, no_policy, in __mkroute_input()
1903 err = -ENOBUFS; in __mkroute_input()
1907 rth->rt_is_input = 1; in __mkroute_input()
1910 rth->dst.input = ip_forward; in __mkroute_input()
1912 rt_set_nexthop(rth, daddr, res, fnhe, res->fi, res->type, itag, in __mkroute_input()
1914 lwtunnel_set_redirect(&rth->dst); in __mkroute_input()
1915 skb_dst_set(skb, &rth->dst); in __mkroute_input()
1936 if (likely(outer_iph->protocol != IPPROTO_ICMP)) in ip_multipath_l3_keys()
1939 if (unlikely((outer_iph->frag_off & htons(IP_OFFSET)) != 0)) in ip_multipath_l3_keys()
1942 icmph = skb_header_pointer(skb, outer_iph->ihl * 4, sizeof(_icmph), in ip_multipath_l3_keys()
1947 if (!icmp_is_err(icmph->type)) in ip_multipath_l3_keys()
1951 outer_iph->ihl * 4 + sizeof(_icmph), in ip_multipath_l3_keys()
1958 hash_keys->addrs.v4addrs.src = key_iph->saddr; in ip_multipath_l3_keys()
1959 hash_keys->addrs.v4addrs.dst = key_iph->daddr; in ip_multipath_l3_keys()
1966 u32 multipath_hash = fl4 ? fl4->flowi4_multipath_hash : 0; in fib_multipath_hash()
1970 switch (net->ipv4.sysctl_fib_multipath_hash_policy) { in fib_multipath_hash()
1977 hash_keys.addrs.v4addrs.src = fl4->saddr; in fib_multipath_hash()
1978 hash_keys.addrs.v4addrs.dst = fl4->daddr; in fib_multipath_hash()
1987 /* short-circuit if we already have L4 hash present */ in fib_multipath_hash()
1988 if (skb->l4_hash) in fib_multipath_hash()
1999 hash_keys.addrs.v4addrs.src = flkeys->addrs.v4addrs.src; in fib_multipath_hash()
2000 hash_keys.addrs.v4addrs.dst = flkeys->addrs.v4addrs.dst; in fib_multipath_hash()
2001 hash_keys.ports.src = flkeys->ports.src; in fib_multipath_hash()
2002 hash_keys.ports.dst = flkeys->ports.dst; in fib_multipath_hash()
2003 hash_keys.basic.ip_proto = flkeys->basic.ip_proto; in fib_multipath_hash()
2007 hash_keys.addrs.v4addrs.src = fl4->saddr; in fib_multipath_hash()
2008 hash_keys.addrs.v4addrs.dst = fl4->daddr; in fib_multipath_hash()
2009 hash_keys.ports.src = fl4->fl4_sport; in fib_multipath_hash()
2010 hash_keys.ports.dst = fl4->fl4_dport; in fib_multipath_hash()
2011 hash_keys.basic.ip_proto = fl4->flowi4_proto; in fib_multipath_hash()
2040 hash_keys.addrs.v4addrs.src = fl4->saddr; in fib_multipath_hash()
2041 hash_keys.addrs.v4addrs.dst = fl4->daddr; in fib_multipath_hash()
2061 if (res->fi && fib_info_num_path(res->fi) > 1) { in ip_mkroute_input()
2062 int h = fib_multipath_hash(res->fi->fib_net, NULL, skb, hkeys); in ip_mkroute_input()
2065 IPCB(skb)->flags |= IPSKB_MULTIPATH; in ip_mkroute_input()
2073 /* Implements all the saddr-related checks as ip_route_input_slow(),
2084 int err = -EINVAL; in ip_route_use_hint()
2088 return -EINVAL; in ip_route_use_hint()
2099 if (rt->rt_type != RTN_LOCAL) in ip_route_use_hint()
2120 struct fib_nh_common *nhc = res->fi ? res->nhc : NULL; in ip_rt_get_dev()
2124 dev = l3mdev_master_dev_rcu(nhc->nhc_dev); in ip_rt_get_dev()
2126 return dev ? : net->loopback_dev; in ip_rt_get_dev()
2150 int err = -EINVAL; in ip_route_input_slow()
2168 if (tun_info && !(tun_info->mode & IP_TUNNEL_INFO_TX)) in ip_route_input_slow()
2169 fl4.flowi4_tun_key.tun_id = tun_info->key.tun_id; in ip_route_input_slow()
2177 res->fi = NULL; in ip_route_input_slow()
2178 res->table = NULL; in ip_route_input_slow()
2183 * I even do not know to fix it or not. Waiting for complains :-) in ip_route_input_slow()
2206 fl4.flowi4_iif = dev->ifindex; in ip_route_input_slow()
2207 fl4.flowi4_mark = skb->mark; in ip_route_input_slow()
2227 err = -EHOSTUNREACH; in ip_route_input_slow()
2231 if (res->type == RTN_BROADCAST) { in ip_route_input_slow()
2240 if (res->type == RTN_LOCAL) { in ip_route_input_slow()
2249 err = -EHOSTUNREACH; in ip_route_input_slow()
2252 if (res->type != RTN_UNICAST) in ip_route_input_slow()
2260 if (skb->protocol != htons(ETH_P_IP)) in ip_route_input_slow()
2270 res->type = RTN_BROADCAST; in ip_route_input_slow()
2276 IPCB(skb)->flags |= IPSKB_NOPOLICY; in ip_route_input_slow()
2278 do_cache &= res->fi && !itag; in ip_route_input_slow()
2282 rth = rcu_dereference(nhc->nhc_rth_input); in ip_route_input_slow()
2284 skb_dst_set_noref(skb, &rth->dst); in ip_route_input_slow()
2291 flags | RTCF_LOCAL, res->type, in ip_route_input_slow()
2296 rth->dst.output= ip_rt_bug; in ip_route_input_slow()
2298 rth->dst.tclassid = itag; in ip_route_input_slow()
2300 rth->rt_is_input = 1; in ip_route_input_slow()
2303 if (res->type == RTN_UNREACHABLE) { in ip_route_input_slow()
2304 rth->dst.input= ip_error; in ip_route_input_slow()
2305 rth->dst.error= -err; in ip_route_input_slow()
2306 rth->rt_flags &= ~RTCF_LOCAL; in ip_route_input_slow()
2312 rth->dst.lwtstate = lwtstate_get(nhc->nhc_lwtstate); in ip_route_input_slow()
2313 if (lwtunnel_input_redirect(rth->dst.lwtstate)) { in ip_route_input_slow()
2314 WARN_ON(rth->dst.input == lwtunnel_input); in ip_route_input_slow()
2315 rth->dst.lwtstate->orig_input = rth->dst.input; in ip_route_input_slow()
2316 rth->dst.input = lwtunnel_input; in ip_route_input_slow()
2322 skb_dst_set(skb, &rth->dst); in ip_route_input_slow()
2328 res->type = RTN_UNREACHABLE; in ip_route_input_slow()
2329 res->fi = NULL; in ip_route_input_slow()
2330 res->table = NULL; in ip_route_input_slow()
2341 &daddr, &saddr, dev->name); in ip_route_input_slow()
2345 err = -EINVAL; in ip_route_input_slow()
2349 err = -ENOBUFS; in ip_route_input_slow()
2378 hardware multicast filters :-( As result the host on multicasting in ip_route_input_rcu()
2390 int err = -EINVAL; in ip_route_input_rcu()
2395 ip_hdr(skb)->protocol); in ip_route_input_rcu()
2401 l3_in_dev = __in_dev_get_rcu(skb->dev); in ip_route_input_rcu()
2404 ip_hdr(skb)->protocol); in ip_route_input_rcu()
2429 struct fib_info *fi = res->fi; in __mkroute_output()
2432 u16 type = res->type; in __mkroute_output()
2438 return ERR_PTR(-EINVAL); in __mkroute_output()
2441 if (ipv4_is_loopback(fl4->saddr) && in __mkroute_output()
2442 !(dev_out->flags & IFF_LOOPBACK) && in __mkroute_output()
2444 return ERR_PTR(-EINVAL); in __mkroute_output()
2446 if (ipv4_is_lbcast(fl4->daddr)) in __mkroute_output()
2448 else if (ipv4_is_multicast(fl4->daddr)) in __mkroute_output()
2450 else if (ipv4_is_zeronet(fl4->daddr)) in __mkroute_output()
2451 return ERR_PTR(-EINVAL); in __mkroute_output()
2453 if (dev_out->flags & IFF_LOOPBACK) in __mkroute_output()
2462 if (!ip_check_mc_rcu(in_dev, fl4->daddr, fl4->saddr, in __mkroute_output()
2463 fl4->flowi4_proto)) in __mkroute_output()
2467 /* If multicast route do not exist use in __mkroute_output()
2471 if (fi && res->prefixlen < 4) in __mkroute_output()
2474 (orig_oif != dev_out->ifindex)) { in __mkroute_output()
2493 fnhe = find_exception(nhc, fl4->daddr); in __mkroute_output()
2497 prth = &fnhe->fnhe_rth_output; in __mkroute_output()
2499 if (unlikely(fl4->flowi4_flags & in __mkroute_output()
2501 !(nhc->nhc_gw_family && in __mkroute_output()
2502 nhc->nhc_scope == RT_SCOPE_LINK))) { in __mkroute_output()
2506 prth = raw_cpu_ptr(nhc->nhc_pcpu_rth_output); in __mkroute_output()
2509 if (rt_cache_valid(rth) && dst_hold_safe(&rth->dst)) in __mkroute_output()
2518 return ERR_PTR(-ENOBUFS); in __mkroute_output()
2520 rth->rt_iif = orig_oif; in __mkroute_output()
2526 !(dev_out->flags & IFF_LOOPBACK)) { in __mkroute_output()
2527 rth->dst.output = ip_mc_output; in __mkroute_output()
2533 !ipv4_is_local_multicast(fl4->daddr)) { in __mkroute_output()
2534 rth->dst.input = ip_mr_input; in __mkroute_output()
2535 rth->dst.output = ip_mc_output; in __mkroute_output()
2541 rt_set_nexthop(rth, fl4->daddr, res, fnhe, fi, type, 0, do_cache); in __mkroute_output()
2542 lwtunnel_set_redirect(&rth->dst); in __mkroute_output()
2562 fl4->flowi4_iif = LOOPBACK_IFINDEX; in ip_route_output_key_hash()
2578 int orig_oif = fl4->flowi4_oif; in ip_route_output_key_hash_rcu()
2583 if (fl4->saddr) { in ip_route_output_key_hash_rcu()
2584 if (ipv4_is_multicast(fl4->saddr) || in ip_route_output_key_hash_rcu()
2585 ipv4_is_lbcast(fl4->saddr) || in ip_route_output_key_hash_rcu()
2586 ipv4_is_zeronet(fl4->saddr)) { in ip_route_output_key_hash_rcu()
2587 rth = ERR_PTR(-EINVAL); in ip_route_output_key_hash_rcu()
2591 rth = ERR_PTR(-ENETUNREACH); in ip_route_output_key_hash_rcu()
2593 /* I removed check for oif == dev_out->oif here. in ip_route_output_key_hash_rcu()
2598 of another iface. --ANK in ip_route_output_key_hash_rcu()
2601 if (fl4->flowi4_oif == 0 && in ip_route_output_key_hash_rcu()
2602 (ipv4_is_multicast(fl4->daddr) || in ip_route_output_key_hash_rcu()
2603 ipv4_is_lbcast(fl4->daddr))) { in ip_route_output_key_hash_rcu()
2605 dev_out = __ip_dev_find(net, fl4->saddr, false); in ip_route_output_key_hash_rcu()
2624 fl4->flowi4_oif = dev_out->ifindex; in ip_route_output_key_hash_rcu()
2628 if (!(fl4->flowi4_flags & FLOWI_FLAG_ANYSRC)) { in ip_route_output_key_hash_rcu()
2630 if (!__ip_dev_find(net, fl4->saddr, false)) in ip_route_output_key_hash_rcu()
2636 if (fl4->flowi4_oif) { in ip_route_output_key_hash_rcu()
2637 dev_out = dev_get_by_index_rcu(net, fl4->flowi4_oif); in ip_route_output_key_hash_rcu()
2638 rth = ERR_PTR(-ENODEV); in ip_route_output_key_hash_rcu()
2643 if (!(dev_out->flags & IFF_UP) || !__in_dev_get_rcu(dev_out)) { in ip_route_output_key_hash_rcu()
2644 rth = ERR_PTR(-ENETUNREACH); in ip_route_output_key_hash_rcu()
2647 if (ipv4_is_local_multicast(fl4->daddr) || in ip_route_output_key_hash_rcu()
2648 ipv4_is_lbcast(fl4->daddr) || in ip_route_output_key_hash_rcu()
2649 fl4->flowi4_proto == IPPROTO_IGMP) { in ip_route_output_key_hash_rcu()
2650 if (!fl4->saddr) in ip_route_output_key_hash_rcu()
2651 fl4->saddr = inet_select_addr(dev_out, 0, in ip_route_output_key_hash_rcu()
2655 if (!fl4->saddr) { in ip_route_output_key_hash_rcu()
2656 if (ipv4_is_multicast(fl4->daddr)) in ip_route_output_key_hash_rcu()
2657 fl4->saddr = inet_select_addr(dev_out, 0, in ip_route_output_key_hash_rcu()
2658 fl4->flowi4_scope); in ip_route_output_key_hash_rcu()
2659 else if (!fl4->daddr) in ip_route_output_key_hash_rcu()
2660 fl4->saddr = inet_select_addr(dev_out, 0, in ip_route_output_key_hash_rcu()
2665 if (!fl4->daddr) { in ip_route_output_key_hash_rcu()
2666 fl4->daddr = fl4->saddr; in ip_route_output_key_hash_rcu()
2667 if (!fl4->daddr) in ip_route_output_key_hash_rcu()
2668 fl4->daddr = fl4->saddr = htonl(INADDR_LOOPBACK); in ip_route_output_key_hash_rcu()
2669 dev_out = net->loopback_dev; in ip_route_output_key_hash_rcu()
2670 fl4->flowi4_oif = LOOPBACK_IFINDEX; in ip_route_output_key_hash_rcu()
2671 res->type = RTN_LOCAL; in ip_route_output_key_hash_rcu()
2678 res->fi = NULL; in ip_route_output_key_hash_rcu()
2679 res->table = NULL; in ip_route_output_key_hash_rcu()
2680 if (fl4->flowi4_oif && in ip_route_output_key_hash_rcu()
2681 (ipv4_is_multicast(fl4->daddr) || in ip_route_output_key_hash_rcu()
2682 !netif_index_is_l3_master(net, fl4->flowi4_oif))) { in ip_route_output_key_hash_rcu()
2694 and ifaddr state. --ANK in ip_route_output_key_hash_rcu()
2701 if (fl4->saddr == 0) in ip_route_output_key_hash_rcu()
2702 fl4->saddr = inet_select_addr(dev_out, 0, in ip_route_output_key_hash_rcu()
2704 res->type = RTN_UNICAST; in ip_route_output_key_hash_rcu()
2711 if (res->type == RTN_LOCAL) { in ip_route_output_key_hash_rcu()
2712 if (!fl4->saddr) { in ip_route_output_key_hash_rcu()
2713 if (res->fi->fib_prefsrc) in ip_route_output_key_hash_rcu()
2714 fl4->saddr = res->fi->fib_prefsrc; in ip_route_output_key_hash_rcu()
2716 fl4->saddr = fl4->daddr; in ip_route_output_key_hash_rcu()
2721 net->loopback_dev; in ip_route_output_key_hash_rcu()
2728 fl4->flowi4_oif = dev_out->ifindex; in ip_route_output_key_hash_rcu()
2762 struct dst_entry *new = &rt->dst; in ipv4_blackhole_route()
2764 new->__use = 1; in ipv4_blackhole_route()
2765 new->input = dst_discard; in ipv4_blackhole_route()
2766 new->output = dst_discard_out; in ipv4_blackhole_route()
2768 new->dev = net->loopback_dev; in ipv4_blackhole_route()
2769 if (new->dev) in ipv4_blackhole_route()
2770 dev_hold(new->dev); in ipv4_blackhole_route()
2772 rt->rt_is_input = ort->rt_is_input; in ipv4_blackhole_route()
2773 rt->rt_iif = ort->rt_iif; in ipv4_blackhole_route()
2774 rt->rt_pmtu = ort->rt_pmtu; in ipv4_blackhole_route()
2775 rt->rt_mtu_locked = ort->rt_mtu_locked; in ipv4_blackhole_route()
2777 rt->rt_genid = rt_genid_ipv4(net); in ipv4_blackhole_route()
2778 rt->rt_flags = ort->rt_flags; in ipv4_blackhole_route()
2779 rt->rt_type = ort->rt_type; in ipv4_blackhole_route()
2780 rt->rt_uses_gateway = ort->rt_uses_gateway; in ipv4_blackhole_route()
2781 rt->rt_gw_family = ort->rt_gw_family; in ipv4_blackhole_route()
2782 if (rt->rt_gw_family == AF_INET) in ipv4_blackhole_route()
2783 rt->rt_gw4 = ort->rt_gw4; in ipv4_blackhole_route()
2784 else if (rt->rt_gw_family == AF_INET6) in ipv4_blackhole_route()
2785 rt->rt_gw6 = ort->rt_gw6; in ipv4_blackhole_route()
2787 INIT_LIST_HEAD(&rt->rt_uncached); in ipv4_blackhole_route()
2792 return rt ? &rt->dst : ERR_PTR(-ENOMEM); in ipv4_blackhole_route()
2803 if (flp4->flowi4_proto) { in ip_route_output_flow()
2804 flp4->flowi4_oif = rt->dst.dev->ifindex; in ip_route_output_flow()
2805 rt = (struct rtable *)xfrm_lookup_route(net, &rt->dst, in ip_route_output_flow()
2828 dst_cache = (struct dst_cache *)&info->dst_cache; in ip_route_output_tunnel()
2836 fl4.flowi4_mark = skb->mark; in ip_route_output_tunnel()
2838 fl4.daddr = info->key.u.ipv4.dst; in ip_route_output_tunnel()
2839 fl4.saddr = info->key.u.ipv4.src; in ip_route_output_tunnel()
2840 tos = info->key.tos; in ip_route_output_tunnel()
2846 return ERR_PTR(-ENETUNREACH); in ip_route_output_tunnel()
2848 if (rt->dst.dev == dev) { /* is this necessary? */ in ip_route_output_tunnel()
2851 return ERR_PTR(-ELOOP); in ip_route_output_tunnel()
2855 dst_cache_set_ip4(dst_cache, &rt->dst, fl4.saddr); in ip_route_output_tunnel()
2876 return -EMSGSIZE; in rt_fill_info()
2879 r->rtm_family = AF_INET; in rt_fill_info()
2880 r->rtm_dst_len = 32; in rt_fill_info()
2881 r->rtm_src_len = 0; in rt_fill_info()
2882 r->rtm_tos = fl4 ? fl4->flowi4_tos : 0; in rt_fill_info()
2883 r->rtm_table = table_id < 256 ? table_id : RT_TABLE_COMPAT; in rt_fill_info()
2886 r->rtm_type = rt->rt_type; in rt_fill_info()
2887 r->rtm_scope = RT_SCOPE_UNIVERSE; in rt_fill_info()
2888 r->rtm_protocol = RTPROT_UNSPEC; in rt_fill_info()
2889 r->rtm_flags = (rt->rt_flags & ~0xFFFF) | RTM_F_CLONED; in rt_fill_info()
2890 if (rt->rt_flags & RTCF_NOTIFY) in rt_fill_info()
2891 r->rtm_flags |= RTM_F_NOTIFY; in rt_fill_info()
2892 if (IPCB(skb)->flags & IPSKB_DOREDIRECT) in rt_fill_info()
2893 r->rtm_flags |= RTCF_DOREDIRECT; in rt_fill_info()
2898 r->rtm_src_len = 32; in rt_fill_info()
2902 if (rt->dst.dev && in rt_fill_info()
2903 nla_put_u32(skb, RTA_OIF, rt->dst.dev->ifindex)) in rt_fill_info()
2906 if (rt->dst.tclassid && in rt_fill_info()
2907 nla_put_u32(skb, RTA_FLOW, rt->dst.tclassid)) in rt_fill_info()
2911 fl4->saddr != src) { in rt_fill_info()
2912 if (nla_put_in_addr(skb, RTA_PREFSRC, fl4->saddr)) in rt_fill_info()
2915 if (rt->rt_uses_gateway) { in rt_fill_info()
2916 if (rt->rt_gw_family == AF_INET && in rt_fill_info()
2917 nla_put_in_addr(skb, RTA_GATEWAY, rt->rt_gw4)) { in rt_fill_info()
2919 } else if (rt->rt_gw_family == AF_INET6) { in rt_fill_info()
2929 via->rtvia_family = AF_INET6; in rt_fill_info()
2930 memcpy(via->rtvia_addr, &rt->rt_gw6, alen); in rt_fill_info()
2934 expires = rt->dst.expires; in rt_fill_info()
2939 expires -= now; in rt_fill_info()
2944 memcpy(metrics, dst_metrics_ptr(&rt->dst), sizeof(metrics)); in rt_fill_info()
2945 if (rt->rt_pmtu && expires) in rt_fill_info()
2946 metrics[RTAX_MTU - 1] = rt->rt_pmtu; in rt_fill_info()
2947 if (rt->rt_mtu_locked && expires) in rt_fill_info()
2948 metrics[RTAX_LOCK - 1] |= BIT(RTAX_MTU); in rt_fill_info()
2953 if (fl4->flowi4_mark && in rt_fill_info()
2954 nla_put_u32(skb, RTA_MARK, fl4->flowi4_mark)) in rt_fill_info()
2957 if (!uid_eq(fl4->flowi4_uid, INVALID_UID) && in rt_fill_info()
2960 fl4->flowi4_uid))) in rt_fill_info()
2969 fl4->saddr, fl4->daddr, in rt_fill_info()
2979 if (nla_put_u32(skb, RTA_IIF, fl4->flowi4_iif)) in rt_fill_info()
2984 error = rt->dst.error; in rt_fill_info()
2986 if (rtnl_put_cacheinfo(skb, &rt->dst, 0, expires, error) < 0) in rt_fill_info()
2994 return -EMSGSIZE; in rt_fill_info()
3008 fnhe = rcu_dereference(fnhe->fnhe_next)) { in fnhe_dump_bucket()
3015 if (fnhe->fnhe_genid != genid) in fnhe_dump_bucket()
3018 if (fnhe->fnhe_expires && in fnhe_dump_bucket()
3019 time_after(jiffies, fnhe->fnhe_expires)) in fnhe_dump_bucket()
3022 rt = rcu_dereference(fnhe->fnhe_rth_input); in fnhe_dump_bucket()
3024 rt = rcu_dereference(fnhe->fnhe_rth_output); in fnhe_dump_bucket()
3028 err = rt_fill_info(net, fnhe->fnhe_daddr, 0, rt, in fnhe_dump_bucket()
3030 NETLINK_CB(cb->skb).portid, in fnhe_dump_bucket()
3031 cb->nlh->nlmsg_seq, flags); in fnhe_dump_bucket()
3046 struct net *net = sock_net(cb->skb->sk); in fib_dump_info_fnhe()
3054 if (nhc->nhc_flags & RTNH_F_DEAD) in fib_dump_info_fnhe()
3058 bucket = rcu_dereference(nhc->nhc_exceptions); in fib_dump_info_fnhe()
3088 skb->protocol = htons(ETH_P_IP); in inet_rtm_getroute_build_skb()
3090 iph->protocol = ip_proto; in inet_rtm_getroute_build_skb()
3091 iph->saddr = src; in inet_rtm_getroute_build_skb()
3092 iph->daddr = dst; in inet_rtm_getroute_build_skb()
3093 iph->version = 0x4; in inet_rtm_getroute_build_skb()
3094 iph->frag_off = 0; in inet_rtm_getroute_build_skb()
3095 iph->ihl = 0x5; in inet_rtm_getroute_build_skb()
3096 skb_set_transport_header(skb, skb->len); in inet_rtm_getroute_build_skb()
3098 switch (iph->protocol) { in inet_rtm_getroute_build_skb()
3103 udph->source = sport; in inet_rtm_getroute_build_skb()
3104 udph->dest = dport; in inet_rtm_getroute_build_skb()
3105 udph->len = htons(sizeof(struct udphdr)); in inet_rtm_getroute_build_skb()
3106 udph->check = 0; in inet_rtm_getroute_build_skb()
3113 tcph->source = sport; in inet_rtm_getroute_build_skb()
3114 tcph->dest = dport; in inet_rtm_getroute_build_skb()
3115 tcph->doff = sizeof(struct tcphdr) / 4; in inet_rtm_getroute_build_skb()
3116 tcph->rst = 1; in inet_rtm_getroute_build_skb()
3117 tcph->check = ~tcp_v4_check(sizeof(struct tcphdr), in inet_rtm_getroute_build_skb()
3125 icmph->type = ICMP_ECHO; in inet_rtm_getroute_build_skb()
3126 icmph->code = 0; in inet_rtm_getroute_build_skb()
3138 struct rtmsg *rtm; in inet_rtm_valid_getroute_req() local
3141 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*rtm))) { in inet_rtm_valid_getroute_req()
3144 return -EINVAL; in inet_rtm_valid_getroute_req()
3148 return nlmsg_parse_deprecated(nlh, sizeof(*rtm), tb, RTA_MAX, in inet_rtm_valid_getroute_req()
3151 rtm = nlmsg_data(nlh); in inet_rtm_valid_getroute_req()
3152 if ((rtm->rtm_src_len && rtm->rtm_src_len != 32) || in inet_rtm_valid_getroute_req()
3153 (rtm->rtm_dst_len && rtm->rtm_dst_len != 32) || in inet_rtm_valid_getroute_req()
3154 rtm->rtm_table || rtm->rtm_protocol || in inet_rtm_valid_getroute_req()
3155 rtm->rtm_scope || rtm->rtm_type) { in inet_rtm_valid_getroute_req()
3157 return -EINVAL; in inet_rtm_valid_getroute_req()
3160 if (rtm->rtm_flags & ~(RTM_F_NOTIFY | in inet_rtm_valid_getroute_req()
3164 return -EINVAL; in inet_rtm_valid_getroute_req()
3167 err = nlmsg_parse_deprecated_strict(nlh, sizeof(*rtm), tb, RTA_MAX, in inet_rtm_valid_getroute_req()
3172 if ((tb[RTA_SRC] && !rtm->rtm_src_len) || in inet_rtm_valid_getroute_req()
3173 (tb[RTA_DST] && !rtm->rtm_dst_len)) { in inet_rtm_valid_getroute_req()
3175 return -EINVAL; in inet_rtm_valid_getroute_req()
3195 return -EINVAL; in inet_rtm_valid_getroute_req()
3205 struct net *net = sock_net(in_skb->sk); in inet_rtm_getroute()
3213 struct rtmsg *rtm; in inet_rtm_getroute() local
3226 rtm = nlmsg_data(nlh); in inet_rtm_getroute()
3251 return -ENOBUFS; in inet_rtm_getroute()
3255 fl4.flowi4_tos = rtm->rtm_tos & IPTOS_RT_MASK; in inet_rtm_getroute()
3272 err = -ENODEV; in inet_rtm_getroute()
3277 skb->dev = dev; in inet_rtm_getroute()
3278 skb->mark = mark; in inet_rtm_getroute()
3280 rtm->rtm_tos & IPTOS_RT_MASK, dev, in inet_rtm_getroute()
3284 if (err == 0 && rt->dst.error) in inet_rtm_getroute()
3285 err = -rt->dst.error; in inet_rtm_getroute()
3288 skb->dev = net->loopback_dev; in inet_rtm_getroute()
3294 skb_dst_set(skb, &rt->dst); in inet_rtm_getroute()
3300 if (rtm->rtm_flags & RTM_F_NOTIFY) in inet_rtm_getroute()
3301 rt->rt_flags |= RTCF_NOTIFY; in inet_rtm_getroute()
3303 if (rtm->rtm_flags & RTM_F_LOOKUP_TABLE) in inet_rtm_getroute()
3304 table_id = res.table ? res.table->tb_id : 0; in inet_rtm_getroute()
3312 if (rtm->rtm_flags & RTM_F_FIB_MATCH) { in inet_rtm_getroute()
3318 err = -EHOSTUNREACH; in inet_rtm_getroute()
3326 fri.type = rt->rt_type; in inet_rtm_getroute()
3333 u8 slen = 32 - fri.dst_len; in inet_rtm_getroute()
3335 if (fa->fa_slen == slen && in inet_rtm_getroute()
3336 fa->tb_id == fri.tb_id && in inet_rtm_getroute()
3337 fa->fa_tos == fri.tos && in inet_rtm_getroute()
3338 fa->fa_info == res.fi && in inet_rtm_getroute()
3339 fa->fa_type == fri.type) { in inet_rtm_getroute()
3340 fri.offload = fa->offload; in inet_rtm_getroute()
3341 fri.trap = fa->trap; in inet_rtm_getroute()
3347 nlh->nlmsg_seq, RTM_NEWROUTE, &fri, 0); in inet_rtm_getroute()
3351 nlh->nlmsg_seq, 0); in inet_rtm_getroute()
3370 rt_cache_flush(dev_net(in_dev->dev)); in ip_rt_multicast_event()
3382 struct net *net = (struct net *)__ctl->extra1; in ipv4_sysctl_rtcache_flush()
3390 return -EINVAL; in ipv4_sysctl_rtcache_flush()
3409 /* Deprecated. Use gc_min_interval_ms */
3527 /* Don't export non-whitelisted sysctls to unprivileged users */ in sysctl_route_net_init()
3528 if (net->user_ns != &init_user_ns) { in sysctl_route_net_init()
3535 net->ipv4.route_hdr = register_net_sysctl(net, "net/ipv4/route", tbl); in sysctl_route_net_init()
3536 if (!net->ipv4.route_hdr) in sysctl_route_net_init()
3544 return -ENOMEM; in sysctl_route_net_init()
3551 tbl = net->ipv4.route_hdr->ctl_table_arg; in sysctl_route_net_exit()
3552 unregister_net_sysctl_table(net->ipv4.route_hdr); in sysctl_route_net_exit()
3565 atomic_set(&net->ipv4.rt_genid, 0); in rt_genid_init()
3566 atomic_set(&net->fnhe_genid, 0); in rt_genid_init()
3567 atomic_set(&net->ipv4.dev_addr_genid, get_random_int()); in rt_genid_init()
3580 return -ENOMEM; in ipv4_inetpeer_init()
3582 net->ipv4.peers = bp; in ipv4_inetpeer_init()
3588 struct inet_peer_base *bp = net->ipv4.peers; in ipv4_inetpeer_exit()
3590 net->ipv4.peers = NULL; in ipv4_inetpeer_exit()
3609 /* For modern hosts, this will use 2 MB of memory */ in ip_rt_init()
3629 INIT_LIST_HEAD(&ul->head); in ip_rt_init()
3630 spin_lock_init(&ul->lock); in ip_rt_init()