Lines Matching +full:bp +full:- +full:disabled +full:- +full:ports
1 // SPDX-License-Identifier: GPL-2.0-or-later
7 * ROUTE - implementation of the IP router.
48 * Andi Kleen : Load-limit warning messages.
219 seq_printf(seq, "%-127s\n", in rt_cache_seq_show()
240 for (cpu = *pos-1; cpu < nr_cpu_ids; ++cpu) { in rt_cpu_seq_start()
282 0, /* st->in_hit */ in rt_cpu_seq_show()
283 st->in_slow_tot, in rt_cpu_seq_show()
284 st->in_slow_mc, in rt_cpu_seq_show()
285 st->in_no_route, in rt_cpu_seq_show()
286 st->in_brd, in rt_cpu_seq_show()
287 st->in_martian_dst, in rt_cpu_seq_show()
288 st->in_martian_src, in rt_cpu_seq_show()
290 0, /* st->out_hit */ in rt_cpu_seq_show()
291 st->out_slow_tot, in rt_cpu_seq_show()
292 st->out_slow_mc, in rt_cpu_seq_show()
294 0, /* st->gc_total */ in rt_cpu_seq_show()
295 0, /* st->gc_ignored */ in rt_cpu_seq_show()
296 0, /* st->gc_goal_miss */ in rt_cpu_seq_show()
297 0, /* st->gc_dst_overflow */ in rt_cpu_seq_show()
298 0, /* st->in_hlist_search */ in rt_cpu_seq_show()
299 0 /* st->out_hlist_search */ in rt_cpu_seq_show()
319 return -ENOMEM; in rt_acct_proc_show()
341 pde = proc_create_seq("rt_cache", 0444, net->proc_net, in ip_rt_do_proc_init()
346 pde = proc_create_seq("rt_cache", 0444, net->proc_net_stat, in ip_rt_do_proc_init()
352 pde = proc_create_single("rt_acct", 0, net->proc_net, in ip_rt_do_proc_init()
361 remove_proc_entry("rt_cache", net->proc_net_stat); in ip_rt_do_proc_init()
364 remove_proc_entry("rt_cache", net->proc_net); in ip_rt_do_proc_init()
366 return -ENOMEM; in ip_rt_do_proc_init()
371 remove_proc_entry("rt_cache", net->proc_net_stat); in ip_rt_do_proc_exit()
372 remove_proc_entry("rt_cache", net->proc_net); in ip_rt_do_proc_exit()
374 remove_proc_entry("rt_acct", net->proc_net); in ip_rt_do_proc_exit()
400 res = rth->rt_genid != rt_genid_ipv4(dev_net_rcu(rth->dst.dev)); in rt_is_expired()
421 if (likely(rt->rt_gw_family == AF_INET)) { in ipv4_neigh_lookup()
422 n = ip_neigh_gw4(dev, rt->rt_gw4); in ipv4_neigh_lookup()
423 } else if (rt->rt_gw_family == AF_INET6) { in ipv4_neigh_lookup()
424 n = ip_neigh_gw6(dev, &rt->rt_gw6); in ipv4_neigh_lookup()
428 pkey = skb ? ip_hdr(skb)->daddr : *((__be32 *) daddr); in ipv4_neigh_lookup()
432 if (!IS_ERR(n) && !refcount_inc_not_zero(&n->refcnt)) in ipv4_neigh_lookup()
446 if (rt->rt_gw_family == AF_INET) { in ipv4_confirm_neigh()
447 pkey = (const __be32 *)&rt->rt_gw4; in ipv4_confirm_neigh()
448 } else if (rt->rt_gw_family == AF_INET6) { in ipv4_confirm_neigh()
449 return __ipv6_confirm_neigh_stub(dev, &rt->rt_gw6); in ipv4_confirm_neigh()
451 (rt->rt_flags & in ipv4_confirm_neigh()
482 delta = get_random_u32_below(now - old); in ip_idents_reserve()
485 * supports -fno-strict-overflow before reporting it that was a bug in ip_idents_reserve()
486 * in UBSAN, and it has been fixed in GCC-8. in ip_idents_reserve()
488 return atomic_add_return(segs + delta, p_id) - segs; in ip_idents_reserve()
496 if (unlikely(siphash_key_is_zero(&net->ipv4.ip_id_key))) in __ip_select_ident()
497 get_random_bytes(&net->ipv4.ip_id_key, in __ip_select_ident()
498 sizeof(net->ipv4.ip_id_key)); in __ip_select_ident()
500 hash = siphash_3u32((__force u32)iph->daddr, in __ip_select_ident()
501 (__force u32)iph->saddr, in __ip_select_ident()
502 iph->protocol, in __ip_select_ident()
503 &net->ipv4.ip_id_key); in __ip_select_ident()
505 iph->id = htons(id); in __ip_select_ident()
517 oif = sk->sk_bound_dev_if; in __build_flow_key()
518 mark = READ_ONCE(sk->sk_mark); in __build_flow_key()
522 sk->sk_protocol; in __build_flow_key()
526 prot, flow_flags, iph->daddr, iph->saddr, 0, 0, in __build_flow_key()
533 const struct net *net = dev_net(skb->dev); in build_skb_flow_key()
535 int oif = skb->dev->ifindex; in build_skb_flow_key()
536 u8 prot = iph->protocol; in build_skb_flow_key()
537 u32 mark = skb->mark; in build_skb_flow_key()
538 __u8 tos = iph->tos; in build_skb_flow_key()
547 __be32 daddr = inet->inet_daddr; in build_sk_flow_key()
550 inet_opt = rcu_dereference(inet->inet_opt); in build_sk_flow_key()
551 if (inet_opt && inet_opt->opt.srr) in build_sk_flow_key()
552 daddr = inet_opt->opt.faddr; in build_sk_flow_key()
553 flowi4_init_output(fl4, sk->sk_bound_dev_if, READ_ONCE(sk->sk_mark), in build_sk_flow_key()
557 IPPROTO_RAW : sk->sk_protocol, in build_sk_flow_key()
559 daddr, inet->inet_saddr, 0, 0, in build_sk_flow_key()
579 rt = rcu_dereference(fnhe->fnhe_rth_input); in fnhe_flush_routes()
581 RCU_INIT_POINTER(fnhe->fnhe_rth_input, NULL); in fnhe_flush_routes()
582 dst_dev_put(&rt->dst); in fnhe_flush_routes()
583 dst_release(&rt->dst); in fnhe_flush_routes()
585 rt = rcu_dereference(fnhe->fnhe_rth_output); in fnhe_flush_routes()
587 RCU_INIT_POINTER(fnhe->fnhe_rth_output, NULL); in fnhe_flush_routes()
588 dst_dev_put(&rt->dst); in fnhe_flush_routes()
589 dst_release(&rt->dst); in fnhe_flush_routes()
598 for (fnhe_p = &hash->chain; ; fnhe_p = &fnhe->fnhe_next) { in fnhe_remove_oldest()
604 time_before(fnhe->fnhe_stamp, oldest->fnhe_stamp)) { in fnhe_remove_oldest()
610 *oldest_p = oldest->fnhe_next; in fnhe_remove_oldest()
626 rt->rt_pmtu = fnhe->fnhe_pmtu; in fill_route_from_fnhe()
627 rt->rt_mtu_locked = fnhe->fnhe_mtu_locked; in fill_route_from_fnhe()
628 rt->dst.expires = fnhe->fnhe_expires; in fill_route_from_fnhe()
630 if (fnhe->fnhe_gw) { in fill_route_from_fnhe()
631 rt->rt_flags |= RTCF_REDIRECTED; in fill_route_from_fnhe()
632 rt->rt_uses_gateway = 1; in fill_route_from_fnhe()
633 rt->rt_gw_family = AF_INET; in fill_route_from_fnhe()
634 rt->rt_gw4 = fnhe->fnhe_gw; in fill_route_from_fnhe()
649 genid = fnhe_genid(dev_net(nhc->nhc_dev)); in update_or_create_fnhe()
654 hash = rcu_dereference(nhc->nhc_exceptions); in update_or_create_fnhe()
659 rcu_assign_pointer(nhc->nhc_exceptions, hash); in update_or_create_fnhe()
665 for (fnhe = rcu_dereference(hash->chain); fnhe; in update_or_create_fnhe()
666 fnhe = rcu_dereference(fnhe->fnhe_next)) { in update_or_create_fnhe()
667 if (fnhe->fnhe_daddr == daddr) in update_or_create_fnhe()
673 if (fnhe->fnhe_genid != genid) in update_or_create_fnhe()
674 fnhe->fnhe_genid = genid; in update_or_create_fnhe()
676 fnhe->fnhe_gw = gw; in update_or_create_fnhe()
678 fnhe->fnhe_pmtu = pmtu; in update_or_create_fnhe()
679 fnhe->fnhe_mtu_locked = lock; in update_or_create_fnhe()
681 fnhe->fnhe_expires = max(1UL, expires); in update_or_create_fnhe()
683 rt = rcu_dereference(fnhe->fnhe_rth_input); in update_or_create_fnhe()
686 rt = rcu_dereference(fnhe->fnhe_rth_output); in update_or_create_fnhe()
696 depth--; in update_or_create_fnhe()
703 fnhe->fnhe_next = hash->chain; in update_or_create_fnhe()
705 fnhe->fnhe_genid = genid; in update_or_create_fnhe()
706 fnhe->fnhe_daddr = daddr; in update_or_create_fnhe()
707 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()
710 fnhe->fnhe_expires = max(1UL, expires); in update_or_create_fnhe()
712 rcu_assign_pointer(hash->chain, fnhe); in update_or_create_fnhe()
718 rt = rcu_dereference(nhc->nhc_rth_input); in update_or_create_fnhe()
720 WRITE_ONCE(rt->dst.obsolete, DST_OBSOLETE_KILL); in update_or_create_fnhe()
725 prt = per_cpu_ptr(nhc->nhc_pcpu_rth_output, i); in update_or_create_fnhe()
728 WRITE_ONCE(rt->dst.obsolete, DST_OBSOLETE_KILL); in update_or_create_fnhe()
732 fnhe->fnhe_stamp = jiffies; in update_or_create_fnhe()
741 __be32 new_gw = icmp_hdr(skb)->un.gateway; in __ip_do_redirect()
742 __be32 old_gw = ip_hdr(skb)->saddr; in __ip_do_redirect()
743 struct net_device *dev = skb->dev; in __ip_do_redirect()
749 switch (icmp_hdr(skb)->code & 7) { in __ip_do_redirect()
760 if (rt->rt_gw_family != AF_INET || rt->rt_gw4 != old_gw) in __ip_do_redirect()
783 n = __ipv4_neigh_lookup(rt->dst.dev, (__force u32)new_gw); in __ip_do_redirect()
785 n = neigh_create(&arp_tbl, &new_gw, rt->dst.dev); in __ip_do_redirect()
787 if (!(READ_ONCE(n->nud_state) & NUD_VALID)) { in __ip_do_redirect()
795 update_or_create_fnhe(nhc, fl4->daddr, new_gw, in __ip_do_redirect()
800 WRITE_ONCE(rt->dst.obsolete, DST_OBSOLETE_KILL); in __ip_do_redirect()
810 const struct iphdr *iph = (const struct iphdr *) skb->data; in __ip_do_redirect()
811 __be32 daddr = iph->daddr; in __ip_do_redirect()
812 __be32 saddr = iph->saddr; in __ip_do_redirect()
815 " Advised path = %pI4 -> %pI4\n", in __ip_do_redirect()
816 &old_gw, dev->name, &new_gw, in __ip_do_redirect()
827 const struct iphdr *iph = (const struct iphdr *) skb->data; in ip_do_redirect()
828 struct net *net = dev_net(skb->dev); in ip_do_redirect()
829 int oif = skb->dev->ifindex; in ip_do_redirect()
830 u8 prot = iph->protocol; in ip_do_redirect()
831 u32 mark = skb->mark; in ip_do_redirect()
832 __u8 tos = iph->tos; in ip_do_redirect()
845 if ((READ_ONCE(dst->obsolete) > 0) || in ipv4_negative_advice()
846 (rt->rt_flags & RTCF_REDIRECTED) || in ipv4_negative_advice()
847 READ_ONCE(rt->dst.expires)) in ipv4_negative_advice()
877 in_dev = __in_dev_get_rcu(rt->dst.dev); in ip_rt_send_redirect()
883 vif = l3mdev_master_ifindex_rcu(rt->dst.dev); in ip_rt_send_redirect()
885 net = dev_net(rt->dst.dev); in ip_rt_send_redirect()
886 peer = inet_getpeer_v4(net->ipv4.peers, ip_hdr(skb)->saddr, vif); in ip_rt_send_redirect()
890 rt_nexthop(rt, ip_hdr(skb)->daddr)); in ip_rt_send_redirect()
897 if (time_after(jiffies, peer->rate_last + ip_rt_redirect_silence)) { in ip_rt_send_redirect()
898 peer->rate_tokens = 0; in ip_rt_send_redirect()
899 peer->n_redirects = 0; in ip_rt_send_redirect()
905 if (peer->n_redirects >= ip_rt_redirect_number) { in ip_rt_send_redirect()
906 peer->rate_last = jiffies; in ip_rt_send_redirect()
913 if (peer->n_redirects == 0 || in ip_rt_send_redirect()
915 (peer->rate_last + in ip_rt_send_redirect()
916 (ip_rt_redirect_load << peer->n_redirects)))) { in ip_rt_send_redirect()
917 __be32 gw = rt_nexthop(rt, ip_hdr(skb)->daddr); in ip_rt_send_redirect()
920 peer->rate_last = jiffies; in ip_rt_send_redirect()
921 ++peer->n_redirects; in ip_rt_send_redirect()
923 peer->n_redirects == ip_rt_redirect_number) in ip_rt_send_redirect()
925 &ip_hdr(skb)->saddr, inet_iif(skb), in ip_rt_send_redirect()
926 &ip_hdr(skb)->daddr, &gw); in ip_rt_send_redirect()
935 struct net_device *dev = skb->dev; in ip_error()
944 if (netif_is_l3_master(skb->dev)) { in ip_error()
945 dev = __dev_get_by_index(dev_net(skb->dev), IPCB(skb)->iif); in ip_error()
952 /* IP on this device is disabled. */ in ip_error()
956 net = dev_net(rt->dst.dev); in ip_error()
958 switch (rt->dst.error) { in ip_error()
972 switch (rt->dst.error) { in ip_error()
990 peer = inet_getpeer_v4(net->ipv4.peers, ip_hdr(skb)->saddr, in ip_error()
991 l3mdev_master_ifindex_rcu(skb->dev)); in ip_error()
995 peer->rate_tokens += now - peer->rate_last; in ip_error()
996 if (peer->rate_tokens > ip_rt_error_burst) in ip_error()
997 peer->rate_tokens = ip_rt_error_burst; in ip_error()
998 peer->rate_last = now; in ip_error()
999 if (peer->rate_tokens >= ip_rt_error_cost) in ip_error()
1000 peer->rate_tokens -= ip_rt_error_cost; in ip_error()
1015 struct dst_entry *dst = &rt->dst; in __ip_rt_update_pmtu()
1030 if (mtu < net->ipv4.ip_rt_min_pmtu) { in __ip_rt_update_pmtu()
1032 mtu = min(old_mtu, net->ipv4.ip_rt_min_pmtu); in __ip_rt_update_pmtu()
1035 if (rt->rt_pmtu == mtu && !lock && in __ip_rt_update_pmtu()
1036 time_before(jiffies, READ_ONCE(dst->expires) - in __ip_rt_update_pmtu()
1037 net->ipv4.ip_rt_mtu_expires / 2)) in __ip_rt_update_pmtu()
1050 update_or_create_fnhe(nhc, fl4->daddr, 0, mtu, lock, in __ip_rt_update_pmtu()
1051 jiffies + net->ipv4.ip_rt_mtu_expires); in __ip_rt_update_pmtu()
1057 update_or_create_fnhe(nhc, fl4->daddr, 0, mtu, lock, in __ip_rt_update_pmtu()
1058 jiffies + net->ipv4.ip_rt_mtu_expires); in __ip_rt_update_pmtu()
1074 if (skb && netif_is_any_bridge_port(skb->dev)) in ip_rt_update_pmtu()
1083 const struct iphdr *iph = (const struct iphdr *)skb->data; in ipv4_update_pmtu()
1086 u32 mark = IP4_REPLY_MARK(net, skb->mark); in ipv4_update_pmtu()
1088 __build_flow_key(net, &fl4, NULL, iph, oif, iph->tos, protocol, mark, in ipv4_update_pmtu()
1100 const struct iphdr *iph = (const struct iphdr *)skb->data; in __ipv4_sk_update_pmtu()
1107 fl4.flowi4_mark = IP4_REPLY_MARK(sock_net(sk), skb->mark); in __ipv4_sk_update_pmtu()
1118 const struct iphdr *iph = (const struct iphdr *)skb->data; in ipv4_sk_update_pmtu()
1140 if (READ_ONCE(odst->obsolete) && !odst->ops->check(odst, 0)) { in ipv4_sk_update_pmtu()
1148 __ip_rt_update_pmtu(dst_rtable(xfrm_dst_path(&rt->dst)), &fl4, mtu); in ipv4_sk_update_pmtu()
1150 if (!dst_check(&rt->dst, 0)) { in ipv4_sk_update_pmtu()
1152 dst_release(&rt->dst); in ipv4_sk_update_pmtu()
1162 sk_dst_set(sk, &rt->dst); in ipv4_sk_update_pmtu()
1173 const struct iphdr *iph = (const struct iphdr *)skb->data; in ipv4_redirect()
1177 __build_flow_key(net, &fl4, NULL, iph, oif, iph->tos, protocol, 0, 0); in ipv4_redirect()
1188 const struct iphdr *iph = (const struct iphdr *)skb->data; in ipv4_sk_redirect()
1207 /* All IPV4 dsts are created with ->obsolete set to the value in ipv4_dst_check()
1215 if (READ_ONCE(dst->obsolete) != DST_OBSOLETE_FORCE_CHK || in ipv4_dst_check()
1232 ip_hdr(skb)->version != 4 || ip_hdr(skb)->ihl < 5) in ipv4_send_dest_unreach()
1236 if (ip_hdr(skb)->ihl > 5) { in ipv4_send_dest_unreach()
1237 if (!pskb_network_may_pull(skb, ip_hdr(skb)->ihl * 4)) in ipv4_send_dest_unreach()
1239 opt.optlen = ip_hdr(skb)->ihl * 4 - sizeof(struct iphdr); in ipv4_send_dest_unreach()
1242 dev = skb->dev ? skb->dev : skb_rtable(skb)->dst.dev; in ipv4_send_dest_unreach()
1260 dst_set_expires(&rt->dst, 0); in ipv4_link_failure()
1265 pr_debug("%s: %pI4 -> %pI4, %s\n", in ip_rt_bug()
1266 __func__, &ip_hdr(skb)->saddr, &ip_hdr(skb)->daddr, in ip_rt_bug()
1267 skb->dev ? skb->dev->name : "?"); in ip_rt_bug()
1287 src = ip_hdr(skb)->saddr; in ip_rt_get_source()
1292 .daddr = iph->daddr, in ip_rt_get_source()
1293 .saddr = iph->saddr, in ip_rt_get_source()
1295 .flowi4_oif = rt->dst.dev->ifindex, in ip_rt_get_source()
1296 .flowi4_iif = skb->dev->ifindex, in ip_rt_get_source()
1297 .flowi4_mark = skb->mark, in ip_rt_get_source()
1301 if (fib_lookup(dev_net(rt->dst.dev), &fl4, &res, 0) == 0) in ip_rt_get_source()
1302 src = fib_result_prefsrc(dev_net(rt->dst.dev), &res); in ip_rt_get_source()
1304 src = inet_select_addr(rt->dst.dev, in ip_rt_get_source()
1305 rt_nexthop(rt, iph->daddr), in ip_rt_get_source()
1315 if (!(rt->dst.tclassid & 0xFFFF)) in set_class_tag()
1316 rt->dst.tclassid |= tag & 0xFFFF; in set_class_tag()
1317 if (!(rt->dst.tclassid & 0xFFFF0000)) in set_class_tag()
1318 rt->dst.tclassid |= tag & 0xFFFF0000; in set_class_tag()
1330 advmss = max_t(unsigned int, ipv4_mtu(dst) - header_size, in ipv4_default_advmss()
1331 net->ipv4.ip_rt_min_advmss); in ipv4_default_advmss()
1334 return min(advmss, IPV4_MAX_PMTU - header_size); in ipv4_default_advmss()
1351 hash = rcu_dereference_protected(nhc->nhc_exceptions, in ip_del_fnhe()
1355 fnhe_p = &hash->chain; in ip_del_fnhe()
1358 if (fnhe->fnhe_daddr == daddr) { in ip_del_fnhe()
1360 fnhe->fnhe_next, lockdep_is_held(&fnhe_lock))); in ip_del_fnhe()
1364 fnhe->fnhe_daddr = 0; in ip_del_fnhe()
1369 fnhe_p = &fnhe->fnhe_next; in ip_del_fnhe()
1370 fnhe = rcu_dereference_protected(fnhe->fnhe_next, in ip_del_fnhe()
1380 struct fnhe_hash_bucket *hash = rcu_dereference(nhc->nhc_exceptions); in find_exception()
1390 fnhe = rcu_dereference(fnhe->fnhe_next)) { in find_exception()
1391 if (fnhe->fnhe_daddr == daddr) { in find_exception()
1392 if (fnhe->fnhe_expires && in find_exception()
1393 time_after(jiffies, fnhe->fnhe_expires)) { in find_exception()
1404 * 1. mtu on route is locked - use it
1411 struct fib_nh_common *nhc = res->nhc; in ip_mtu_from_fib_result()
1412 struct net_device *dev = nhc->nhc_dev; in ip_mtu_from_fib_result()
1413 struct fib_info *fi = res->fi; in ip_mtu_from_fib_result()
1416 if (READ_ONCE(dev_net(dev)->ipv4.sysctl_ip_fwd_use_pmtu) || in ip_mtu_from_fib_result()
1417 fi->fib_metrics->metrics[RTAX_LOCK - 1] & (1 << RTAX_MTU)) in ip_mtu_from_fib_result()
1418 mtu = fi->fib_mtu; in ip_mtu_from_fib_result()
1424 if (fnhe && !time_after_eq(jiffies, fnhe->fnhe_expires)) in ip_mtu_from_fib_result()
1425 mtu = fnhe->fnhe_pmtu; in ip_mtu_from_fib_result()
1429 mtu = min(READ_ONCE(dev->mtu), IP_MAX_MTU); in ip_mtu_from_fib_result()
1431 return mtu - lwtunnel_headroom(nhc->nhc_lwtstate, mtu); in ip_mtu_from_fib_result()
1441 if (daddr == fnhe->fnhe_daddr) { in rt_bind_exception()
1444 int genid = fnhe_genid(dev_net(rt->dst.dev)); in rt_bind_exception()
1447 porig = &fnhe->fnhe_rth_input; in rt_bind_exception()
1449 porig = &fnhe->fnhe_rth_output; in rt_bind_exception()
1452 if (fnhe->fnhe_genid != genid) { in rt_bind_exception()
1453 fnhe->fnhe_genid = genid; in rt_bind_exception()
1454 fnhe->fnhe_gw = 0; in rt_bind_exception()
1455 fnhe->fnhe_pmtu = 0; in rt_bind_exception()
1456 fnhe->fnhe_expires = 0; in rt_bind_exception()
1457 fnhe->fnhe_mtu_locked = false; in rt_bind_exception()
1462 if (!rt->rt_gw4) { in rt_bind_exception()
1463 rt->rt_gw4 = daddr; in rt_bind_exception()
1464 rt->rt_gw_family = AF_INET; in rt_bind_exception()
1468 dst_hold(&rt->dst); in rt_bind_exception()
1471 dst_dev_put(&orig->dst); in rt_bind_exception()
1472 dst_release(&orig->dst); in rt_bind_exception()
1477 fnhe->fnhe_stamp = jiffies; in rt_bind_exception()
1490 p = (struct rtable **)&nhc->nhc_rth_input; in rt_cache_route()
1492 p = (struct rtable **)raw_cpu_ptr(nhc->nhc_pcpu_rth_output); in rt_cache_route()
1499 dst_hold(&rt->dst); in rt_cache_route()
1504 dst_release(&orig->dst); in rt_cache_route()
1507 dst_release(&rt->dst); in rt_cache_route()
1525 rt->dst.rt_uncached_list = ul; in rt_add_uncached_list()
1527 spin_lock_bh(&ul->lock); in rt_add_uncached_list()
1528 list_add_tail(&rt->dst.rt_uncached, &ul->head); in rt_add_uncached_list()
1529 spin_unlock_bh(&ul->lock); in rt_add_uncached_list()
1534 if (!list_empty(&rt->dst.rt_uncached)) { in rt_del_uncached_list()
1535 struct uncached_list *ul = rt->dst.rt_uncached_list; in rt_del_uncached_list()
1537 spin_lock_bh(&ul->lock); in rt_del_uncached_list()
1538 list_del_init(&rt->dst.rt_uncached); in rt_del_uncached_list()
1539 spin_unlock_bh(&ul->lock); in rt_del_uncached_list()
1557 if (list_empty(&ul->head)) in rt_flush_dev()
1560 spin_lock_bh(&ul->lock); in rt_flush_dev()
1561 list_for_each_entry_safe(rt, safe, &ul->head, dst.rt_uncached) { in rt_flush_dev()
1562 if (rt->dst.dev != dev) in rt_flush_dev()
1564 rt->dst.dev = blackhole_netdev; in rt_flush_dev()
1566 &rt->dst.dev_tracker, GFP_ATOMIC); in rt_flush_dev()
1567 list_del_init(&rt->dst.rt_uncached); in rt_flush_dev()
1569 spin_unlock_bh(&ul->lock); in rt_flush_dev()
1576 READ_ONCE(rt->dst.obsolete) == DST_OBSOLETE_FORCE_CHK && in rt_cache_valid()
1591 if (nhc->nhc_gw_family && nhc->nhc_scope == RT_SCOPE_LINK) { in rt_set_nexthop()
1592 rt->rt_uses_gateway = 1; in rt_set_nexthop()
1593 rt->rt_gw_family = nhc->nhc_gw_family; in rt_set_nexthop()
1595 if (likely(nhc->nhc_gw_family == AF_INET)) in rt_set_nexthop()
1596 rt->rt_gw4 = nhc->nhc_gw.ipv4; in rt_set_nexthop()
1598 rt->rt_gw6 = nhc->nhc_gw.ipv6; in rt_set_nexthop()
1601 ip_dst_init_metrics(&rt->dst, fi->fib_metrics); in rt_set_nexthop()
1604 if (nhc->nhc_family == AF_INET) { in rt_set_nexthop()
1608 rt->dst.tclassid = nh->nh_tclassid; in rt_set_nexthop()
1611 rt->dst.lwtstate = lwtstate_get(nhc->nhc_lwtstate); in rt_set_nexthop()
1622 if (!rt->rt_gw4) { in rt_set_nexthop()
1623 rt->rt_gw_family = AF_INET; in rt_set_nexthop()
1624 rt->rt_gw4 = daddr; in rt_set_nexthop()
1633 set_class_tag(rt, res->tclassid); in rt_set_nexthop()
1649 rt->rt_genid = rt_genid_ipv4(dev_net(dev)); in rt_dst_alloc()
1650 rt->rt_flags = flags; in rt_dst_alloc()
1651 rt->rt_type = type; in rt_dst_alloc()
1652 rt->rt_is_input = 0; in rt_dst_alloc()
1653 rt->rt_iif = 0; in rt_dst_alloc()
1654 rt->rt_pmtu = 0; in rt_dst_alloc()
1655 rt->rt_mtu_locked = 0; in rt_dst_alloc()
1656 rt->rt_uses_gateway = 0; in rt_dst_alloc()
1657 rt->rt_gw_family = 0; in rt_dst_alloc()
1658 rt->rt_gw4 = 0; in rt_dst_alloc()
1660 rt->dst.output = ip_output; in rt_dst_alloc()
1662 rt->dst.input = ip_local_deliver; in rt_dst_alloc()
1674 rt->dst.flags); in rt_dst_clone()
1677 new_rt->rt_genid = rt_genid_ipv4(dev_net(dev)); in rt_dst_clone()
1678 new_rt->rt_flags = rt->rt_flags; in rt_dst_clone()
1679 new_rt->rt_type = rt->rt_type; in rt_dst_clone()
1680 new_rt->rt_is_input = rt->rt_is_input; in rt_dst_clone()
1681 new_rt->rt_iif = rt->rt_iif; in rt_dst_clone()
1682 new_rt->rt_pmtu = rt->rt_pmtu; in rt_dst_clone()
1683 new_rt->rt_mtu_locked = rt->rt_mtu_locked; in rt_dst_clone()
1684 new_rt->rt_gw_family = rt->rt_gw_family; in rt_dst_clone()
1685 if (rt->rt_gw_family == AF_INET) in rt_dst_clone()
1686 new_rt->rt_gw4 = rt->rt_gw4; in rt_dst_clone()
1687 else if (rt->rt_gw_family == AF_INET6) in rt_dst_clone()
1688 new_rt->rt_gw6 = rt->rt_gw6; in rt_dst_clone()
1690 new_rt->dst.input = READ_ONCE(rt->dst.input); in rt_dst_clone()
1691 new_rt->dst.output = READ_ONCE(rt->dst.output); in rt_dst_clone()
1692 new_rt->dst.error = rt->dst.error; in rt_dst_clone()
1693 new_rt->dst.lastuse = jiffies; in rt_dst_clone()
1694 new_rt->dst.lwtstate = lwtstate_get(rt->dst.lwtstate); in rt_dst_clone()
1715 if (skb->protocol != htons(ETH_P_IP)) in ip_mc_validate_source()
1723 ip_hdr(skb)->protocol != IPPROTO_IGMP) in ip_mc_validate_source()
1754 IPCB(skb)->flags |= IPSKB_NOPOLICY; in ip_route_input_mc()
1756 rth = rt_dst_alloc(dev_net(dev)->loopback_dev, flags, RTN_MULTICAST, in ip_route_input_mc()
1762 rth->dst.tclassid = itag; in ip_route_input_mc()
1764 rth->dst.output = ip_rt_bug; in ip_route_input_mc()
1765 rth->rt_is_input= 1; in ip_route_input_mc()
1769 rth->dst.input = ip_mr_input; in ip_route_input_mc()
1774 skb_dst_set(skb, &rth->dst); in ip_route_input_mc()
1793 &daddr, &saddr, dev->name); in ip_handle_martian_source()
1794 if (dev->hard_header_len && skb_mac_header_was_set(skb)) { in ip_handle_martian_source()
1798 dev->hard_header_len, false); in ip_handle_martian_source()
1812 struct net_device *dev = nhc->nhc_dev; in __mkroute_input()
1828 in_dev->dev, in_dev, &itag); in __mkroute_input()
1830 reason = -err; in __mkroute_input()
1831 ip_handle_martian_source(in_dev->dev, in_dev, skb, daddr, in __mkroute_input()
1837 do_cache = res->fi && !itag; in __mkroute_input()
1839 skb->protocol == htons(ETH_P_IP)) { in __mkroute_input()
1842 gw = nhc->nhc_gw_family == AF_INET ? nhc->nhc_gw.ipv4 : 0; in __mkroute_input()
1845 IPCB(skb)->flags |= IPSKB_DOREDIRECT; in __mkroute_input()
1848 if (skb->protocol != htons(ETH_P_IP)) { in __mkroute_input()
1864 IPCB(skb)->flags |= IPSKB_NOPOLICY; in __mkroute_input()
1869 rth = rcu_dereference(fnhe->fnhe_rth_input); in __mkroute_input()
1871 rth = rcu_dereference(nhc->nhc_rth_input); in __mkroute_input()
1873 skb_dst_set_noref(skb, &rth->dst); in __mkroute_input()
1878 rth = rt_dst_alloc(out_dev->dev, 0, res->type, in __mkroute_input()
1885 rth->rt_is_input = 1; in __mkroute_input()
1888 rth->dst.input = ip_forward; in __mkroute_input()
1890 rt_set_nexthop(rth, daddr, res, fnhe, res->fi, res->type, itag, in __mkroute_input()
1892 lwtunnel_set_redirect(&rth->dst); in __mkroute_input()
1893 skb_dst_set(skb, &rth->dst); in __mkroute_input()
1914 if (likely(outer_iph->protocol != IPPROTO_ICMP)) in ip_multipath_l3_keys()
1917 if (unlikely((outer_iph->frag_off & htons(IP_OFFSET)) != 0)) in ip_multipath_l3_keys()
1920 icmph = skb_header_pointer(skb, outer_iph->ihl * 4, sizeof(_icmph), in ip_multipath_l3_keys()
1925 if (!icmp_is_err(icmph->type)) in ip_multipath_l3_keys()
1929 outer_iph->ihl * 4 + sizeof(_icmph), in ip_multipath_l3_keys()
1936 hash_keys->addrs.v4addrs.src = key_iph->saddr; in ip_multipath_l3_keys()
1937 hash_keys->addrs.v4addrs.dst = key_iph->daddr; in ip_multipath_l3_keys()
1944 u32 hash_fields = READ_ONCE(net->ipv4.sysctl_fib_multipath_hash_fields); in fib_multipath_custom_hash_outer()
1961 hash_keys.ports.src = keys.ports.src; in fib_multipath_custom_hash_outer()
1963 hash_keys.ports.dst = keys.ports.dst; in fib_multipath_custom_hash_outer()
1973 u32 hash_fields = READ_ONCE(net->ipv4.sysctl_fib_multipath_hash_fields); in fib_multipath_custom_hash_inner()
2011 hash_keys.ports.src = keys.ports.src; in fib_multipath_custom_hash_inner()
2013 hash_keys.ports.dst = keys.ports.dst; in fib_multipath_custom_hash_inner()
2033 u32 hash_fields = READ_ONCE(net->ipv4.sysctl_fib_multipath_hash_fields); in fib_multipath_custom_hash_fl4()
2042 hash_keys.addrs.v4addrs.src = fl4->saddr; in fib_multipath_custom_hash_fl4()
2044 hash_keys.addrs.v4addrs.dst = fl4->daddr; in fib_multipath_custom_hash_fl4()
2046 hash_keys.basic.ip_proto = fl4->flowi4_proto; in fib_multipath_custom_hash_fl4()
2048 if (fl4->flowi4_flags & FLOWI_FLAG_ANY_SPORT) in fib_multipath_custom_hash_fl4()
2049 hash_keys.ports.src = (__force __be16)get_random_u16(); in fib_multipath_custom_hash_fl4()
2051 hash_keys.ports.src = fl4->fl4_sport; in fib_multipath_custom_hash_fl4()
2054 hash_keys.ports.dst = fl4->fl4_dport; in fib_multipath_custom_hash_fl4()
2063 u32 multipath_hash = fl4 ? fl4->flowi4_multipath_hash : 0; in fib_multipath_hash()
2067 switch (READ_ONCE(net->ipv4.sysctl_fib_multipath_hash_policy)) { in fib_multipath_hash()
2074 hash_keys.addrs.v4addrs.src = fl4->saddr; in fib_multipath_hash()
2075 hash_keys.addrs.v4addrs.dst = fl4->daddr; in fib_multipath_hash()
2085 /* short-circuit if we already have L4 hash present */ in fib_multipath_hash()
2086 if (skb->l4_hash) in fib_multipath_hash()
2097 hash_keys.addrs.v4addrs.src = flkeys->addrs.v4addrs.src; in fib_multipath_hash()
2098 hash_keys.addrs.v4addrs.dst = flkeys->addrs.v4addrs.dst; in fib_multipath_hash()
2099 hash_keys.ports.src = flkeys->ports.src; in fib_multipath_hash()
2100 hash_keys.ports.dst = flkeys->ports.dst; in fib_multipath_hash()
2101 hash_keys.basic.ip_proto = flkeys->basic.ip_proto; in fib_multipath_hash()
2105 hash_keys.addrs.v4addrs.src = fl4->saddr; in fib_multipath_hash()
2106 hash_keys.addrs.v4addrs.dst = fl4->daddr; in fib_multipath_hash()
2107 if (fl4->flowi4_flags & FLOWI_FLAG_ANY_SPORT) in fib_multipath_hash()
2108 hash_keys.ports.src = (__force __be16)get_random_u16(); in fib_multipath_hash()
2110 hash_keys.ports.src = fl4->fl4_sport; in fib_multipath_hash()
2111 hash_keys.ports.dst = fl4->fl4_dport; in fib_multipath_hash()
2112 hash_keys.basic.ip_proto = fl4->flowi4_proto; in fib_multipath_hash()
2142 hash_keys.addrs.v4addrs.src = fl4->saddr; in fib_multipath_hash()
2143 hash_keys.addrs.v4addrs.dst = fl4->daddr; in fib_multipath_hash()
2168 if (res->fi && fib_info_num_path(res->fi) > 1) { in ip_mkroute_input()
2169 int h = fib_multipath_hash(res->fi->fib_net, NULL, skb, hkeys); in ip_mkroute_input()
2172 IPCB(skb)->flags |= IPSKB_MULTIPATH; in ip_mkroute_input()
2180 /* Implements all the saddr-related checks as ip_route_input_slow(),
2213 if (rt->rt_type != RTN_LOCAL) in ip_route_use_hint()
2234 struct fib_nh_common *nhc = res->fi ? res->nhc : NULL; in ip_rt_get_dev()
2238 dev = l3mdev_master_dev_rcu(nhc->nhc_dev); in ip_rt_get_dev()
2240 return dev ? : net->loopback_dev; in ip_rt_get_dev()
2266 int err = -EINVAL; in ip_route_input_slow()
2273 /* IP on this device is disabled. */ in ip_route_input_slow()
2283 if (tun_info && !(tun_info->mode & IP_TUNNEL_INFO_TX)) in ip_route_input_slow()
2284 fl4.flowi4_tun_key.tun_id = tun_info->key.tun_id; in ip_route_input_slow()
2294 res->fi = NULL; in ip_route_input_slow()
2295 res->table = NULL; in ip_route_input_slow()
2300 * I even do not know to fix it or not. Waiting for complains :-) in ip_route_input_slow()
2332 fl4.flowi4_iif = dev->ifindex; in ip_route_input_slow()
2333 fl4.flowi4_mark = skb->mark; in ip_route_input_slow()
2353 err = -EHOSTUNREACH; in ip_route_input_slow()
2357 if (res->type == RTN_BROADCAST) { in ip_route_input_slow()
2366 err = -EINVAL; in ip_route_input_slow()
2367 if (res->type == RTN_LOCAL) { in ip_route_input_slow()
2376 err = -EHOSTUNREACH; in ip_route_input_slow()
2379 if (res->type != RTN_UNICAST) { in ip_route_input_slow()
2392 if (skb->protocol != htons(ETH_P_IP)) { in ip_route_input_slow()
2404 res->type = RTN_BROADCAST; in ip_route_input_slow()
2409 IPCB(skb)->flags |= IPSKB_NOPOLICY; in ip_route_input_slow()
2411 do_cache &= res->fi && !itag; in ip_route_input_slow()
2415 rth = rcu_dereference(nhc->nhc_rth_input); in ip_route_input_slow()
2417 skb_dst_set_noref(skb, &rth->dst); in ip_route_input_slow()
2424 flags | RTCF_LOCAL, res->type, false); in ip_route_input_slow()
2428 rth->dst.output= ip_rt_bug; in ip_route_input_slow()
2430 rth->dst.tclassid = itag; in ip_route_input_slow()
2432 rth->rt_is_input = 1; in ip_route_input_slow()
2435 if (res->type == RTN_UNREACHABLE) { in ip_route_input_slow()
2436 rth->dst.input= ip_error; in ip_route_input_slow()
2437 rth->dst.error= -err; in ip_route_input_slow()
2438 rth->rt_flags &= ~RTCF_LOCAL; in ip_route_input_slow()
2444 rth->dst.lwtstate = lwtstate_get(nhc->nhc_lwtstate); in ip_route_input_slow()
2445 if (lwtunnel_input_redirect(rth->dst.lwtstate)) { in ip_route_input_slow()
2446 WARN_ON(rth->dst.input == lwtunnel_input); in ip_route_input_slow()
2447 rth->dst.lwtstate->orig_input = rth->dst.input; in ip_route_input_slow()
2448 rth->dst.input = lwtunnel_input; in ip_route_input_slow()
2454 skb_dst_set(skb, &rth->dst); in ip_route_input_slow()
2460 res->type = RTN_UNREACHABLE; in ip_route_input_slow()
2461 res->fi = NULL; in ip_route_input_slow()
2462 res->table = NULL; in ip_route_input_slow()
2473 &daddr, &saddr, dev->name); in ip_route_input_slow()
2494 * hardware multicast filters :-( As result the host on multicasting in ip_route_input_rcu()
2512 ip_hdr(skb)->protocol); in ip_route_input_rcu()
2518 l3_in_dev = __in_dev_get_rcu(skb->dev); in ip_route_input_rcu()
2521 ip_hdr(skb)->protocol); in ip_route_input_rcu()
2561 struct fib_info *fi = res->fi; in __mkroute_output()
2564 u16 type = res->type; in __mkroute_output()
2570 return ERR_PTR(-EINVAL); in __mkroute_output()
2573 if (ipv4_is_loopback(fl4->saddr) && in __mkroute_output()
2574 !(dev_out->flags & IFF_LOOPBACK) && in __mkroute_output()
2576 return ERR_PTR(-EINVAL); in __mkroute_output()
2578 if (ipv4_is_lbcast(fl4->daddr)) in __mkroute_output()
2580 else if (ipv4_is_multicast(fl4->daddr)) in __mkroute_output()
2582 else if (ipv4_is_zeronet(fl4->daddr)) in __mkroute_output()
2583 return ERR_PTR(-EINVAL); in __mkroute_output()
2585 if (dev_out->flags & IFF_LOOPBACK) in __mkroute_output()
2593 if (!ip_check_mc_rcu(in_dev, fl4->daddr, fl4->saddr, in __mkroute_output()
2594 fl4->flowi4_proto)) in __mkroute_output()
2602 if (fi && res->prefixlen < 4) in __mkroute_output()
2605 (orig_oif != dev_out->ifindex)) { in __mkroute_output()
2624 fnhe = find_exception(nhc, fl4->daddr); in __mkroute_output()
2628 prth = &fnhe->fnhe_rth_output; in __mkroute_output()
2630 if (unlikely(fl4->flowi4_flags & in __mkroute_output()
2632 !(nhc->nhc_gw_family && in __mkroute_output()
2633 nhc->nhc_scope == RT_SCOPE_LINK))) { in __mkroute_output()
2637 prth = raw_cpu_ptr(nhc->nhc_pcpu_rth_output); in __mkroute_output()
2640 if (rt_cache_valid(rth) && dst_hold_safe(&rth->dst)) in __mkroute_output()
2648 return ERR_PTR(-ENOBUFS); in __mkroute_output()
2650 rth->rt_iif = orig_oif; in __mkroute_output()
2656 !(dev_out->flags & IFF_LOOPBACK)) { in __mkroute_output()
2657 rth->dst.output = ip_mc_output; in __mkroute_output()
2663 !ipv4_is_local_multicast(fl4->daddr)) { in __mkroute_output()
2664 rth->dst.input = ip_mr_input; in __mkroute_output()
2665 rth->dst.output = ip_mr_output; in __mkroute_output()
2671 rt_set_nexthop(rth, fl4->daddr, res, fnhe, fi, type, 0, do_cache); in __mkroute_output()
2672 lwtunnel_set_redirect(&rth->dst); in __mkroute_output()
2692 fl4->flowi4_iif = LOOPBACK_IFINDEX; in ip_route_output_key_hash()
2693 fl4->flowi4_tos &= INET_DSCP_MASK; in ip_route_output_key_hash()
2708 int orig_oif = fl4->flowi4_oif; in ip_route_output_key_hash_rcu()
2713 if (fl4->saddr) { in ip_route_output_key_hash_rcu()
2714 if (ipv4_is_multicast(fl4->saddr) || in ip_route_output_key_hash_rcu()
2715 ipv4_is_lbcast(fl4->saddr)) { in ip_route_output_key_hash_rcu()
2716 rth = ERR_PTR(-EINVAL); in ip_route_output_key_hash_rcu()
2720 rth = ERR_PTR(-ENETUNREACH); in ip_route_output_key_hash_rcu()
2722 /* I removed check for oif == dev_out->oif here. in ip_route_output_key_hash_rcu()
2727 * of another iface. --ANK in ip_route_output_key_hash_rcu()
2730 if (fl4->flowi4_oif == 0 && in ip_route_output_key_hash_rcu()
2731 (ipv4_is_multicast(fl4->daddr) || in ip_route_output_key_hash_rcu()
2732 ipv4_is_lbcast(fl4->daddr))) { in ip_route_output_key_hash_rcu()
2734 dev_out = __ip_dev_find(net, fl4->saddr, false); in ip_route_output_key_hash_rcu()
2753 fl4->flowi4_oif = dev_out->ifindex; in ip_route_output_key_hash_rcu()
2757 if (!(fl4->flowi4_flags & FLOWI_FLAG_ANYSRC)) { in ip_route_output_key_hash_rcu()
2759 if (!__ip_dev_find(net, fl4->saddr, false)) in ip_route_output_key_hash_rcu()
2765 if (fl4->flowi4_oif) { in ip_route_output_key_hash_rcu()
2766 dev_out = dev_get_by_index_rcu(net, fl4->flowi4_oif); in ip_route_output_key_hash_rcu()
2767 rth = ERR_PTR(-ENODEV); in ip_route_output_key_hash_rcu()
2772 if (!(dev_out->flags & IFF_UP) || !__in_dev_get_rcu(dev_out)) { in ip_route_output_key_hash_rcu()
2773 rth = ERR_PTR(-ENETUNREACH); in ip_route_output_key_hash_rcu()
2776 if (ipv4_is_local_multicast(fl4->daddr) || in ip_route_output_key_hash_rcu()
2777 ipv4_is_lbcast(fl4->daddr) || in ip_route_output_key_hash_rcu()
2778 fl4->flowi4_proto == IPPROTO_IGMP) { in ip_route_output_key_hash_rcu()
2779 if (!fl4->saddr) in ip_route_output_key_hash_rcu()
2780 fl4->saddr = inet_select_addr(dev_out, 0, in ip_route_output_key_hash_rcu()
2784 if (!fl4->saddr) { in ip_route_output_key_hash_rcu()
2785 if (ipv4_is_multicast(fl4->daddr)) in ip_route_output_key_hash_rcu()
2786 fl4->saddr = inet_select_addr(dev_out, 0, in ip_route_output_key_hash_rcu()
2787 fl4->flowi4_scope); in ip_route_output_key_hash_rcu()
2788 else if (!fl4->daddr) in ip_route_output_key_hash_rcu()
2789 fl4->saddr = inet_select_addr(dev_out, 0, in ip_route_output_key_hash_rcu()
2794 if (!fl4->daddr) { in ip_route_output_key_hash_rcu()
2795 fl4->daddr = fl4->saddr; in ip_route_output_key_hash_rcu()
2796 if (!fl4->daddr) in ip_route_output_key_hash_rcu()
2797 fl4->daddr = fl4->saddr = htonl(INADDR_LOOPBACK); in ip_route_output_key_hash_rcu()
2798 dev_out = net->loopback_dev; in ip_route_output_key_hash_rcu()
2799 fl4->flowi4_oif = LOOPBACK_IFINDEX; in ip_route_output_key_hash_rcu()
2800 res->type = RTN_LOCAL; in ip_route_output_key_hash_rcu()
2807 res->fi = NULL; in ip_route_output_key_hash_rcu()
2808 res->table = NULL; in ip_route_output_key_hash_rcu()
2809 if (fl4->flowi4_oif && in ip_route_output_key_hash_rcu()
2810 (ipv4_is_multicast(fl4->daddr) || !fl4->flowi4_l3mdev)) { in ip_route_output_key_hash_rcu()
2822 * and ifaddr state. --ANK in ip_route_output_key_hash_rcu()
2829 if (fl4->saddr == 0) in ip_route_output_key_hash_rcu()
2830 fl4->saddr = inet_select_addr(dev_out, 0, in ip_route_output_key_hash_rcu()
2832 res->type = RTN_UNICAST; in ip_route_output_key_hash_rcu()
2839 if (res->type == RTN_LOCAL) { in ip_route_output_key_hash_rcu()
2840 if (!fl4->saddr) { in ip_route_output_key_hash_rcu()
2841 if (res->fi->fib_prefsrc) in ip_route_output_key_hash_rcu()
2842 fl4->saddr = res->fi->fib_prefsrc; in ip_route_output_key_hash_rcu()
2844 fl4->saddr = fl4->daddr; in ip_route_output_key_hash_rcu()
2849 net->loopback_dev; in ip_route_output_key_hash_rcu()
2856 fl4->flowi4_oif = dev_out->ifindex; in ip_route_output_key_hash_rcu()
2890 struct dst_entry *new = &rt->dst; in ipv4_blackhole_route()
2892 new->__use = 1; in ipv4_blackhole_route()
2893 new->input = dst_discard; in ipv4_blackhole_route()
2894 new->output = dst_discard_out; in ipv4_blackhole_route()
2896 new->dev = net->loopback_dev; in ipv4_blackhole_route()
2897 netdev_hold(new->dev, &new->dev_tracker, GFP_ATOMIC); in ipv4_blackhole_route()
2899 rt->rt_is_input = ort->rt_is_input; in ipv4_blackhole_route()
2900 rt->rt_iif = ort->rt_iif; in ipv4_blackhole_route()
2901 rt->rt_pmtu = ort->rt_pmtu; in ipv4_blackhole_route()
2902 rt->rt_mtu_locked = ort->rt_mtu_locked; in ipv4_blackhole_route()
2904 rt->rt_genid = rt_genid_ipv4(net); in ipv4_blackhole_route()
2905 rt->rt_flags = ort->rt_flags; in ipv4_blackhole_route()
2906 rt->rt_type = ort->rt_type; in ipv4_blackhole_route()
2907 rt->rt_uses_gateway = ort->rt_uses_gateway; in ipv4_blackhole_route()
2908 rt->rt_gw_family = ort->rt_gw_family; in ipv4_blackhole_route()
2909 if (rt->rt_gw_family == AF_INET) in ipv4_blackhole_route()
2910 rt->rt_gw4 = ort->rt_gw4; in ipv4_blackhole_route()
2911 else if (rt->rt_gw_family == AF_INET6) in ipv4_blackhole_route()
2912 rt->rt_gw6 = ort->rt_gw6; in ipv4_blackhole_route()
2917 return rt ? &rt->dst : ERR_PTR(-ENOMEM); in ipv4_blackhole_route()
2928 if (flp4->flowi4_proto) { in ip_route_output_flow()
2929 flp4->flowi4_oif = rt->dst.dev->ifindex; in ip_route_output_flow()
2930 rt = dst_rtable(xfrm_lookup_route(net, &rt->dst, in ip_route_output_flow()
2953 return -EMSGSIZE; in rt_fill_info()
2956 r->rtm_family = AF_INET; in rt_fill_info()
2957 r->rtm_dst_len = 32; in rt_fill_info()
2958 r->rtm_src_len = 0; in rt_fill_info()
2959 r->rtm_tos = inet_dscp_to_dsfield(dscp); in rt_fill_info()
2960 r->rtm_table = table_id < 256 ? table_id : RT_TABLE_COMPAT; in rt_fill_info()
2963 r->rtm_type = rt->rt_type; in rt_fill_info()
2964 r->rtm_scope = RT_SCOPE_UNIVERSE; in rt_fill_info()
2965 r->rtm_protocol = RTPROT_UNSPEC; in rt_fill_info()
2966 r->rtm_flags = (rt->rt_flags & ~0xFFFF) | RTM_F_CLONED; in rt_fill_info()
2967 if (rt->rt_flags & RTCF_NOTIFY) in rt_fill_info()
2968 r->rtm_flags |= RTM_F_NOTIFY; in rt_fill_info()
2969 if (IPCB(skb)->flags & IPSKB_DOREDIRECT) in rt_fill_info()
2970 r->rtm_flags |= RTCF_DOREDIRECT; in rt_fill_info()
2975 r->rtm_src_len = 32; in rt_fill_info()
2979 if (rt->dst.dev && in rt_fill_info()
2980 nla_put_u32(skb, RTA_OIF, rt->dst.dev->ifindex)) in rt_fill_info()
2982 if (lwtunnel_fill_encap(skb, rt->dst.lwtstate, RTA_ENCAP, RTA_ENCAP_TYPE) < 0) in rt_fill_info()
2985 if (rt->dst.tclassid && in rt_fill_info()
2986 nla_put_u32(skb, RTA_FLOW, rt->dst.tclassid)) in rt_fill_info()
2990 fl4->saddr != src) { in rt_fill_info()
2991 if (nla_put_in_addr(skb, RTA_PREFSRC, fl4->saddr)) in rt_fill_info()
2994 if (rt->rt_uses_gateway) { in rt_fill_info()
2995 if (rt->rt_gw_family == AF_INET && in rt_fill_info()
2996 nla_put_in_addr(skb, RTA_GATEWAY, rt->rt_gw4)) { in rt_fill_info()
2998 } else if (rt->rt_gw_family == AF_INET6) { in rt_fill_info()
3008 via->rtvia_family = AF_INET6; in rt_fill_info()
3009 memcpy(via->rtvia_addr, &rt->rt_gw6, alen); in rt_fill_info()
3013 expires = READ_ONCE(rt->dst.expires); in rt_fill_info()
3018 expires -= now; in rt_fill_info()
3023 memcpy(metrics, dst_metrics_ptr(&rt->dst), sizeof(metrics)); in rt_fill_info()
3024 if (rt->rt_pmtu && expires) in rt_fill_info()
3025 metrics[RTAX_MTU - 1] = rt->rt_pmtu; in rt_fill_info()
3026 if (rt->rt_mtu_locked && expires) in rt_fill_info()
3027 metrics[RTAX_LOCK - 1] |= BIT(RTAX_MTU); in rt_fill_info()
3032 if (fl4->flowi4_mark && in rt_fill_info()
3033 nla_put_u32(skb, RTA_MARK, fl4->flowi4_mark)) in rt_fill_info()
3036 if (!uid_eq(fl4->flowi4_uid, INVALID_UID) && in rt_fill_info()
3039 fl4->flowi4_uid))) in rt_fill_info()
3048 fl4->saddr, fl4->daddr, in rt_fill_info()
3058 if (nla_put_u32(skb, RTA_IIF, fl4->flowi4_iif)) in rt_fill_info()
3063 error = rt->dst.error; in rt_fill_info()
3065 if (rtnl_put_cacheinfo(skb, &rt->dst, 0, expires, error) < 0) in rt_fill_info()
3073 return -EMSGSIZE; in rt_fill_info()
3087 fnhe = rcu_dereference(fnhe->fnhe_next)) { in fnhe_dump_bucket()
3094 if (fnhe->fnhe_genid != genid) in fnhe_dump_bucket()
3097 if (fnhe->fnhe_expires && in fnhe_dump_bucket()
3098 time_after(jiffies, fnhe->fnhe_expires)) in fnhe_dump_bucket()
3101 rt = rcu_dereference(fnhe->fnhe_rth_input); in fnhe_dump_bucket()
3103 rt = rcu_dereference(fnhe->fnhe_rth_output); in fnhe_dump_bucket()
3107 err = rt_fill_info(net, fnhe->fnhe_daddr, 0, rt, in fnhe_dump_bucket()
3109 NETLINK_CB(cb->skb).portid, in fnhe_dump_bucket()
3110 cb->nlh->nlmsg_seq, flags); in fnhe_dump_bucket()
3125 struct net *net = sock_net(cb->skb->sk); in fib_dump_info_fnhe()
3133 if (nhc->nhc_flags & RTNH_F_DEAD) in fib_dump_info_fnhe()
3137 bucket = rcu_dereference(nhc->nhc_exceptions); in fib_dump_info_fnhe()
3167 skb->protocol = htons(ETH_P_IP); in inet_rtm_getroute_build_skb()
3169 iph->protocol = ip_proto; in inet_rtm_getroute_build_skb()
3170 iph->saddr = src; in inet_rtm_getroute_build_skb()
3171 iph->daddr = dst; in inet_rtm_getroute_build_skb()
3172 iph->version = 0x4; in inet_rtm_getroute_build_skb()
3173 iph->frag_off = 0; in inet_rtm_getroute_build_skb()
3174 iph->ihl = 0x5; in inet_rtm_getroute_build_skb()
3175 skb_set_transport_header(skb, skb->len); in inet_rtm_getroute_build_skb()
3177 switch (iph->protocol) { in inet_rtm_getroute_build_skb()
3182 udph->source = sport; in inet_rtm_getroute_build_skb()
3183 udph->dest = dport; in inet_rtm_getroute_build_skb()
3184 udph->len = htons(sizeof(struct udphdr)); in inet_rtm_getroute_build_skb()
3185 udph->check = 0; in inet_rtm_getroute_build_skb()
3192 tcph->source = sport; in inet_rtm_getroute_build_skb()
3193 tcph->dest = dport; in inet_rtm_getroute_build_skb()
3194 tcph->doff = sizeof(struct tcphdr) / 4; in inet_rtm_getroute_build_skb()
3195 tcph->rst = 1; in inet_rtm_getroute_build_skb()
3196 tcph->check = ~tcp_v4_check(sizeof(struct tcphdr), in inet_rtm_getroute_build_skb()
3204 icmph->type = ICMP_ECHO; in inet_rtm_getroute_build_skb()
3205 icmph->code = 0; in inet_rtm_getroute_build_skb()
3224 return -EINVAL; in inet_rtm_valid_getroute_req()
3231 if ((rtm->rtm_src_len && rtm->rtm_src_len != 32) || in inet_rtm_valid_getroute_req()
3232 (rtm->rtm_dst_len && rtm->rtm_dst_len != 32) || in inet_rtm_valid_getroute_req()
3233 rtm->rtm_table || rtm->rtm_protocol || in inet_rtm_valid_getroute_req()
3234 rtm->rtm_scope || rtm->rtm_type) { in inet_rtm_valid_getroute_req()
3236 return -EINVAL; in inet_rtm_valid_getroute_req()
3239 if (rtm->rtm_flags & ~(RTM_F_NOTIFY | in inet_rtm_valid_getroute_req()
3243 return -EINVAL; in inet_rtm_valid_getroute_req()
3251 if ((tb[RTA_SRC] && !rtm->rtm_src_len) || in inet_rtm_valid_getroute_req()
3252 (tb[RTA_DST] && !rtm->rtm_dst_len)) { in inet_rtm_valid_getroute_req()
3254 return -EINVAL; in inet_rtm_valid_getroute_req()
3274 return -EINVAL; in inet_rtm_valid_getroute_req()
3284 struct net *net = sock_net(in_skb->sk); in inet_rtm_getroute()
3311 dscp = inet_dsfield_to_dscp(rtm->rtm_tos); in inet_rtm_getroute()
3332 return -ENOBUFS; in inet_rtm_getroute()
3353 err = -ENODEV; in inet_rtm_getroute()
3358 skb->dev = dev; in inet_rtm_getroute()
3359 skb->mark = mark; in inet_rtm_getroute()
3361 &res) ? -EINVAL : 0; in inet_rtm_getroute()
3364 if (err == 0 && rt->dst.error) in inet_rtm_getroute()
3365 err = -rt->dst.error; in inet_rtm_getroute()
3368 skb->dev = net->loopback_dev; in inet_rtm_getroute()
3374 skb_dst_set(skb, &rt->dst); in inet_rtm_getroute()
3380 if (rtm->rtm_flags & RTM_F_NOTIFY) in inet_rtm_getroute()
3381 rt->rt_flags |= RTCF_NOTIFY; in inet_rtm_getroute()
3383 if (rtm->rtm_flags & RTM_F_LOOKUP_TABLE) in inet_rtm_getroute()
3384 table_id = res.table ? res.table->tb_id : 0; in inet_rtm_getroute()
3392 if (rtm->rtm_flags & RTM_F_FIB_MATCH) { in inet_rtm_getroute()
3398 err = -EHOSTUNREACH; in inet_rtm_getroute()
3406 fri.type = rt->rt_type; in inet_rtm_getroute()
3414 u8 slen = 32 - fri.dst_len; in inet_rtm_getroute()
3416 if (fa->fa_slen == slen && in inet_rtm_getroute()
3417 fa->tb_id == fri.tb_id && in inet_rtm_getroute()
3418 fa->fa_dscp == fri.dscp && in inet_rtm_getroute()
3419 fa->fa_info == res.fi && in inet_rtm_getroute()
3420 fa->fa_type == fri.type) { in inet_rtm_getroute()
3421 fri.offload = READ_ONCE(fa->offload); in inet_rtm_getroute()
3422 fri.trap = READ_ONCE(fa->trap); in inet_rtm_getroute()
3424 READ_ONCE(fa->offload_failed); in inet_rtm_getroute()
3430 nlh->nlmsg_seq, RTM_NEWROUTE, &fri, 0); in inet_rtm_getroute()
3434 nlh->nlmsg_seq, 0); in inet_rtm_getroute()
3453 rt_cache_flush(dev_net(in_dev->dev)); in ip_rt_multicast_event()
3465 struct net *net = (struct net *)__ctl->extra1; in ipv4_sysctl_rtcache_flush()
3473 return -EINVAL; in ipv4_sysctl_rtcache_flush()
3611 /* Don't export non-whitelisted sysctls to unprivileged users */ in sysctl_route_net_init()
3612 if (net->user_ns != &init_user_ns) { in sysctl_route_net_init()
3621 tbl[i].data += (void *)net - (void *)&init_net; in sysctl_route_net_init()
3625 net->ipv4.route_hdr = register_net_sysctl_sz(net, "net/ipv4/route", in sysctl_route_net_init()
3627 if (!net->ipv4.route_hdr) in sysctl_route_net_init()
3635 return -ENOMEM; in sysctl_route_net_init()
3642 tbl = net->ipv4.route_hdr->ctl_table_arg; in sysctl_route_net_exit()
3643 unregister_net_sysctl_table(net->ipv4.route_hdr); in sysctl_route_net_exit()
3657 net->ipv4.ip_rt_min_pmtu = DEFAULT_MIN_PMTU; in netns_ip_rt_init()
3658 net->ipv4.ip_rt_mtu_expires = DEFAULT_MTU_EXPIRES; in netns_ip_rt_init()
3659 net->ipv4.ip_rt_min_advmss = DEFAULT_MIN_ADVMSS; in netns_ip_rt_init()
3669 atomic_set(&net->ipv4.rt_genid, 0); in rt_genid_init()
3670 atomic_set(&net->fnhe_genid, 0); in rt_genid_init()
3671 atomic_set(&net->ipv4.dev_addr_genid, get_random_u32()); in rt_genid_init()
3681 struct inet_peer_base *bp = kmalloc(sizeof(*bp), GFP_KERNEL); in ipv4_inetpeer_init() local
3683 if (!bp) in ipv4_inetpeer_init()
3684 return -ENOMEM; in ipv4_inetpeer_init()
3685 inet_peer_base_init(bp); in ipv4_inetpeer_init()
3686 net->ipv4.peers = bp; in ipv4_inetpeer_init()
3692 struct inet_peer_base *bp = net->ipv4.peers; in ipv4_inetpeer_exit() local
3694 net->ipv4.peers = NULL; in ipv4_inetpeer_exit()
3695 inetpeer_invalidate_tree(bp); in ipv4_inetpeer_exit()
3696 kfree(bp); in ipv4_inetpeer_exit()
3738 INIT_LIST_HEAD(&ul->head); in ip_rt_init()
3739 spin_lock_init(&ul->lock); in ip_rt_init()