Lines Matching +full:rx +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.
110 ((oldflp4)->flowi4_tos & (IPTOS_RT_MASK | RTO_ONLINK))
217 seq_printf(seq, "%-127s\n", in rt_cache_seq_show()
238 for (cpu = *pos-1; cpu < nr_cpu_ids; ++cpu) { in rt_cpu_seq_start()
280 0, /* st->in_hit */ in rt_cpu_seq_show()
281 st->in_slow_tot, in rt_cpu_seq_show()
282 st->in_slow_mc, in rt_cpu_seq_show()
283 st->in_no_route, in rt_cpu_seq_show()
284 st->in_brd, in rt_cpu_seq_show()
285 st->in_martian_dst, in rt_cpu_seq_show()
286 st->in_martian_src, in rt_cpu_seq_show()
288 0, /* st->out_hit */ in rt_cpu_seq_show()
289 st->out_slow_tot, in rt_cpu_seq_show()
290 st->out_slow_mc, in rt_cpu_seq_show()
292 0, /* st->gc_total */ in rt_cpu_seq_show()
293 0, /* st->gc_ignored */ in rt_cpu_seq_show()
294 0, /* st->gc_goal_miss */ in rt_cpu_seq_show()
295 0, /* st->gc_dst_overflow */ in rt_cpu_seq_show()
296 0, /* st->in_hlist_search */ in rt_cpu_seq_show()
297 0 /* st->out_hlist_search */ in rt_cpu_seq_show()
317 return -ENOMEM; in rt_acct_proc_show()
339 pde = proc_create_seq("rt_cache", 0444, net->proc_net, in ip_rt_do_proc_init()
344 pde = proc_create_seq("rt_cache", 0444, net->proc_net_stat, in ip_rt_do_proc_init()
350 pde = proc_create_single("rt_acct", 0, net->proc_net, in ip_rt_do_proc_init()
359 remove_proc_entry("rt_cache", net->proc_net_stat); in ip_rt_do_proc_init()
362 remove_proc_entry("rt_cache", net->proc_net); in ip_rt_do_proc_init()
364 return -ENOMEM; in ip_rt_do_proc_init()
369 remove_proc_entry("rt_cache", net->proc_net_stat); in ip_rt_do_proc_exit()
370 remove_proc_entry("rt_cache", net->proc_net); in ip_rt_do_proc_exit()
372 remove_proc_entry("rt_acct", net->proc_net); in ip_rt_do_proc_exit()
395 return rth->rt_genid != rt_genid_ipv4(dev_net(rth->dst.dev)); in rt_is_expired()
408 struct net_device *dev = dst->dev; in ipv4_neigh_lookup()
413 if (likely(rt->rt_gw_family == AF_INET)) { in ipv4_neigh_lookup()
414 n = ip_neigh_gw4(dev, rt->rt_gw4); in ipv4_neigh_lookup()
415 } else if (rt->rt_gw_family == AF_INET6) { in ipv4_neigh_lookup()
416 n = ip_neigh_gw6(dev, &rt->rt_gw6); in ipv4_neigh_lookup()
420 pkey = skb ? ip_hdr(skb)->daddr : *((__be32 *) daddr); in ipv4_neigh_lookup()
424 if (!IS_ERR(n) && !refcount_inc_not_zero(&n->refcnt)) in ipv4_neigh_lookup()
435 struct net_device *dev = dst->dev; in ipv4_confirm_neigh()
438 if (rt->rt_gw_family == AF_INET) { in ipv4_confirm_neigh()
439 pkey = (const __be32 *)&rt->rt_gw4; in ipv4_confirm_neigh()
440 } else if (rt->rt_gw_family == AF_INET6) { in ipv4_confirm_neigh()
441 return __ipv6_confirm_neigh_stub(dev, &rt->rt_gw6); in ipv4_confirm_neigh()
443 (rt->rt_flags & in ipv4_confirm_neigh()
474 delta = get_random_u32_below(now - old); in ip_idents_reserve()
477 * supports -fno-strict-overflow before reporting it that was a bug in ip_idents_reserve()
478 * in UBSAN, and it has been fixed in GCC-8. in ip_idents_reserve()
480 return atomic_add_return(segs + delta, p_id) - segs; in ip_idents_reserve()
488 if (unlikely(siphash_key_is_zero(&net->ipv4.ip_id_key))) in __ip_select_ident()
489 get_random_bytes(&net->ipv4.ip_id_key, in __ip_select_ident()
490 sizeof(net->ipv4.ip_id_key)); in __ip_select_ident()
492 hash = siphash_3u32((__force u32)iph->daddr, in __ip_select_ident()
493 (__force u32)iph->saddr, in __ip_select_ident()
494 iph->protocol, in __ip_select_ident()
495 &net->ipv4.ip_id_key); in __ip_select_ident()
497 iph->id = htons(id); in __ip_select_ident()
505 fl4->flowi4_tos = tos & IPTOS_RT_MASK; in ip_rt_fix_tos()
507 fl4->flowi4_scope = RT_SCOPE_LINK; in ip_rt_fix_tos()
518 oif = sk->sk_bound_dev_if; in __build_flow_key()
519 mark = READ_ONCE(sk->sk_mark); in __build_flow_key()
523 sk->sk_protocol; in __build_flow_key()
527 prot, flow_flags, iph->daddr, iph->saddr, 0, 0, in __build_flow_key()
534 const struct net *net = dev_net(skb->dev); in build_skb_flow_key()
536 int oif = skb->dev->ifindex; in build_skb_flow_key()
537 u8 prot = iph->protocol; in build_skb_flow_key()
538 u32 mark = skb->mark; in build_skb_flow_key()
539 __u8 tos = iph->tos; in build_skb_flow_key()
548 __be32 daddr = inet->inet_daddr; in build_sk_flow_key()
551 inet_opt = rcu_dereference(inet->inet_opt); in build_sk_flow_key()
552 if (inet_opt && inet_opt->opt.srr) in build_sk_flow_key()
553 daddr = inet_opt->opt.faddr; in build_sk_flow_key()
554 flowi4_init_output(fl4, sk->sk_bound_dev_if, READ_ONCE(sk->sk_mark), in build_sk_flow_key()
558 IPPROTO_RAW : sk->sk_protocol, in build_sk_flow_key()
560 daddr, inet->inet_saddr, 0, 0, sk->sk_uid); 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()
714 /* Exception created; mark the cached routes for the nexthop in update_or_create_fnhe()
718 rt = rcu_dereference(nhc->nhc_rth_input); in update_or_create_fnhe()
720 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 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 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()
846 if (dst->obsolete > 0) { in ipv4_negative_advice()
849 } else if ((rt->rt_flags & RTCF_REDIRECTED) || in ipv4_negative_advice()
850 rt->dst.expires) { in ipv4_negative_advice()
884 in_dev = __in_dev_get_rcu(rt->dst.dev); in ip_rt_send_redirect()
890 vif = l3mdev_master_ifindex_rcu(rt->dst.dev); in ip_rt_send_redirect()
893 net = dev_net(rt->dst.dev); in ip_rt_send_redirect()
894 peer = inet_getpeer_v4(net->ipv4.peers, ip_hdr(skb)->saddr, vif, 1); in ip_rt_send_redirect()
897 rt_nexthop(rt, ip_hdr(skb)->daddr)); in ip_rt_send_redirect()
904 if (time_after(jiffies, peer->rate_last + ip_rt_redirect_silence)) { in ip_rt_send_redirect()
905 peer->rate_tokens = 0; in ip_rt_send_redirect()
906 peer->n_redirects = 0; in ip_rt_send_redirect()
912 if (peer->n_redirects >= ip_rt_redirect_number) { in ip_rt_send_redirect()
913 peer->rate_last = jiffies; in ip_rt_send_redirect()
920 if (peer->n_redirects == 0 || in ip_rt_send_redirect()
922 (peer->rate_last + in ip_rt_send_redirect()
923 (ip_rt_redirect_load << peer->n_redirects)))) { in ip_rt_send_redirect()
924 __be32 gw = rt_nexthop(rt, ip_hdr(skb)->daddr); in ip_rt_send_redirect()
927 peer->rate_last = jiffies; in ip_rt_send_redirect()
928 ++peer->n_redirects; in ip_rt_send_redirect()
931 peer->n_redirects == ip_rt_redirect_number) in ip_rt_send_redirect()
933 &ip_hdr(skb)->saddr, inet_iif(skb), in ip_rt_send_redirect()
934 &ip_hdr(skb)->daddr, &gw); in ip_rt_send_redirect()
944 struct net_device *dev = skb->dev; in ip_error()
953 if (netif_is_l3_master(skb->dev)) { in ip_error()
954 dev = __dev_get_by_index(dev_net(skb->dev), IPCB(skb)->iif); in ip_error()
965 net = dev_net(rt->dst.dev); in ip_error()
967 switch (rt->dst.error) { in ip_error()
981 switch (rt->dst.error) { in ip_error()
998 peer = inet_getpeer_v4(net->ipv4.peers, ip_hdr(skb)->saddr, in ip_error()
999 l3mdev_master_ifindex(skb->dev), 1); in ip_error()
1004 peer->rate_tokens += now - peer->rate_last; in ip_error()
1005 if (peer->rate_tokens > ip_rt_error_burst) in ip_error()
1006 peer->rate_tokens = ip_rt_error_burst; in ip_error()
1007 peer->rate_last = now; in ip_error()
1008 if (peer->rate_tokens >= ip_rt_error_cost) in ip_error()
1009 peer->rate_tokens -= ip_rt_error_cost; in ip_error()
1023 struct dst_entry *dst = &rt->dst; in __ip_rt_update_pmtu()
1024 struct net *net = dev_net(dst->dev); in __ip_rt_update_pmtu()
1036 if (mtu < net->ipv4.ip_rt_min_pmtu) { in __ip_rt_update_pmtu()
1038 mtu = min(old_mtu, net->ipv4.ip_rt_min_pmtu); in __ip_rt_update_pmtu()
1041 if (rt->rt_pmtu == mtu && !lock && in __ip_rt_update_pmtu()
1042 time_before(jiffies, dst->expires - net->ipv4.ip_rt_mtu_expires / 2)) in __ip_rt_update_pmtu()
1051 update_or_create_fnhe(nhc, fl4->daddr, 0, mtu, lock, in __ip_rt_update_pmtu()
1052 jiffies + net->ipv4.ip_rt_mtu_expires); in __ip_rt_update_pmtu()
1067 if (skb && netif_is_any_bridge_port(skb->dev)) in ip_rt_update_pmtu()
1076 const struct iphdr *iph = (const struct iphdr *)skb->data; in ipv4_update_pmtu()
1079 u32 mark = IP4_REPLY_MARK(net, skb->mark); in ipv4_update_pmtu()
1081 __build_flow_key(net, &fl4, NULL, iph, oif, iph->tos, protocol, mark, in ipv4_update_pmtu()
1093 const struct iphdr *iph = (const struct iphdr *)skb->data; in __ipv4_sk_update_pmtu()
1100 fl4.flowi4_mark = IP4_REPLY_MARK(sock_net(sk), skb->mark); in __ipv4_sk_update_pmtu()
1111 const struct iphdr *iph = (const struct iphdr *)skb->data; in ipv4_sk_update_pmtu()
1133 if (odst->obsolete && !odst->ops->check(odst, 0)) { in ipv4_sk_update_pmtu()
1141 __ip_rt_update_pmtu((struct rtable *)xfrm_dst_path(&rt->dst), &fl4, mtu); in ipv4_sk_update_pmtu()
1143 if (!dst_check(&rt->dst, 0)) { in ipv4_sk_update_pmtu()
1145 dst_release(&rt->dst); in ipv4_sk_update_pmtu()
1155 sk_dst_set(sk, &rt->dst); in ipv4_sk_update_pmtu()
1166 const struct iphdr *iph = (const struct iphdr *)skb->data; in ipv4_redirect()
1170 __build_flow_key(net, &fl4, NULL, iph, oif, iph->tos, protocol, 0, 0); in ipv4_redirect()
1181 const struct iphdr *iph = (const struct iphdr *)skb->data; in ipv4_sk_redirect()
1200 /* All IPV4 dsts are created with ->obsolete set to the value in ipv4_dst_check()
1208 if (dst->obsolete != DST_OBSOLETE_FORCE_CHK || rt_is_expired(rt)) in ipv4_dst_check()
1224 ip_hdr(skb)->version != 4 || ip_hdr(skb)->ihl < 5) in ipv4_send_dest_unreach()
1228 if (ip_hdr(skb)->ihl > 5) { in ipv4_send_dest_unreach()
1229 if (!pskb_network_may_pull(skb, ip_hdr(skb)->ihl * 4)) in ipv4_send_dest_unreach()
1231 opt.optlen = ip_hdr(skb)->ihl * 4 - sizeof(struct iphdr); in ipv4_send_dest_unreach()
1234 dev = skb->dev ? skb->dev : skb_rtable(skb)->dst.dev; in ipv4_send_dest_unreach()
1252 dst_set_expires(&rt->dst, 0); in ipv4_link_failure()
1257 pr_debug("%s: %pI4 -> %pI4, %s\n", in ip_rt_bug()
1258 __func__, &ip_hdr(skb)->saddr, &ip_hdr(skb)->daddr, in ip_rt_bug()
1259 skb->dev ? skb->dev->name : "?"); in ip_rt_bug()
1267 * because it is used only by IP RR, TS and SRR options,
1279 src = ip_hdr(skb)->saddr; in ip_rt_get_source()
1284 .daddr = iph->daddr, in ip_rt_get_source()
1285 .saddr = iph->saddr, in ip_rt_get_source()
1286 .flowi4_tos = RT_TOS(iph->tos), in ip_rt_get_source()
1287 .flowi4_oif = rt->dst.dev->ifindex, in ip_rt_get_source()
1288 .flowi4_iif = skb->dev->ifindex, in ip_rt_get_source()
1289 .flowi4_mark = skb->mark, in ip_rt_get_source()
1293 if (fib_lookup(dev_net(rt->dst.dev), &fl4, &res, 0) == 0) in ip_rt_get_source()
1294 src = fib_result_prefsrc(dev_net(rt->dst.dev), &res); in ip_rt_get_source()
1296 src = inet_select_addr(rt->dst.dev, in ip_rt_get_source()
1297 rt_nexthop(rt, iph->daddr), in ip_rt_get_source()
1307 if (!(rt->dst.tclassid & 0xFFFF)) in set_class_tag()
1308 rt->dst.tclassid |= tag & 0xFFFF; in set_class_tag()
1309 if (!(rt->dst.tclassid & 0xFFFF0000)) in set_class_tag()
1310 rt->dst.tclassid |= tag & 0xFFFF0000; in set_class_tag()
1316 struct net *net = dev_net(dst->dev); in ipv4_default_advmss()
1318 unsigned int advmss = max_t(unsigned int, ipv4_mtu(dst) - header_size, in ipv4_default_advmss()
1319 net->ipv4.ip_rt_min_advmss); in ipv4_default_advmss()
1321 return min(advmss, IPV4_MAX_PMTU - header_size); in ipv4_default_advmss()
1338 hash = rcu_dereference_protected(nhc->nhc_exceptions, in ip_del_fnhe()
1342 fnhe_p = &hash->chain; in ip_del_fnhe()
1345 if (fnhe->fnhe_daddr == daddr) { in ip_del_fnhe()
1347 fnhe->fnhe_next, lockdep_is_held(&fnhe_lock))); in ip_del_fnhe()
1351 fnhe->fnhe_daddr = 0; in ip_del_fnhe()
1356 fnhe_p = &fnhe->fnhe_next; in ip_del_fnhe()
1357 fnhe = rcu_dereference_protected(fnhe->fnhe_next, in ip_del_fnhe()
1367 struct fnhe_hash_bucket *hash = rcu_dereference(nhc->nhc_exceptions); in find_exception()
1377 fnhe = rcu_dereference(fnhe->fnhe_next)) { in find_exception()
1378 if (fnhe->fnhe_daddr == daddr) { in find_exception()
1379 if (fnhe->fnhe_expires && in find_exception()
1380 time_after(jiffies, fnhe->fnhe_expires)) { in find_exception()
1391 * 1. mtu on route is locked - use it
1398 struct fib_nh_common *nhc = res->nhc; in ip_mtu_from_fib_result()
1399 struct net_device *dev = nhc->nhc_dev; in ip_mtu_from_fib_result()
1400 struct fib_info *fi = res->fi; in ip_mtu_from_fib_result()
1403 if (READ_ONCE(dev_net(dev)->ipv4.sysctl_ip_fwd_use_pmtu) || in ip_mtu_from_fib_result()
1404 fi->fib_metrics->metrics[RTAX_LOCK - 1] & (1 << RTAX_MTU)) in ip_mtu_from_fib_result()
1405 mtu = fi->fib_mtu; in ip_mtu_from_fib_result()
1411 if (fnhe && !time_after_eq(jiffies, fnhe->fnhe_expires)) in ip_mtu_from_fib_result()
1412 mtu = fnhe->fnhe_pmtu; in ip_mtu_from_fib_result()
1416 mtu = min(READ_ONCE(dev->mtu), IP_MAX_MTU); in ip_mtu_from_fib_result()
1418 return mtu - lwtunnel_headroom(nhc->nhc_lwtstate, mtu); in ip_mtu_from_fib_result()
1428 if (daddr == fnhe->fnhe_daddr) { in rt_bind_exception()
1431 int genid = fnhe_genid(dev_net(rt->dst.dev)); in rt_bind_exception()
1434 porig = &fnhe->fnhe_rth_input; in rt_bind_exception()
1436 porig = &fnhe->fnhe_rth_output; in rt_bind_exception()
1439 if (fnhe->fnhe_genid != genid) { in rt_bind_exception()
1440 fnhe->fnhe_genid = genid; in rt_bind_exception()
1441 fnhe->fnhe_gw = 0; in rt_bind_exception()
1442 fnhe->fnhe_pmtu = 0; in rt_bind_exception()
1443 fnhe->fnhe_expires = 0; in rt_bind_exception()
1444 fnhe->fnhe_mtu_locked = false; in rt_bind_exception()
1449 if (!rt->rt_gw4) { in rt_bind_exception()
1450 rt->rt_gw4 = daddr; in rt_bind_exception()
1451 rt->rt_gw_family = AF_INET; in rt_bind_exception()
1455 dst_hold(&rt->dst); in rt_bind_exception()
1458 dst_dev_put(&orig->dst); in rt_bind_exception()
1459 dst_release(&orig->dst); in rt_bind_exception()
1464 fnhe->fnhe_stamp = jiffies; in rt_bind_exception()
1477 p = (struct rtable **)&nhc->nhc_rth_input; in rt_cache_route()
1479 p = (struct rtable **)raw_cpu_ptr(nhc->nhc_pcpu_rth_output); in rt_cache_route()
1486 dst_hold(&rt->dst); in rt_cache_route()
1491 dst_release(&orig->dst); in rt_cache_route()
1494 dst_release(&rt->dst); in rt_cache_route()
1513 rt->dst.rt_uncached_list = ul; in rt_add_uncached_list()
1515 spin_lock_bh(&ul->lock); in rt_add_uncached_list()
1516 list_add_tail(&rt->dst.rt_uncached, &ul->head); in rt_add_uncached_list()
1517 spin_unlock_bh(&ul->lock); in rt_add_uncached_list()
1522 if (!list_empty(&rt->dst.rt_uncached)) { in rt_del_uncached_list()
1523 struct uncached_list *ul = rt->dst.rt_uncached_list; in rt_del_uncached_list()
1525 spin_lock_bh(&ul->lock); in rt_del_uncached_list()
1526 list_del_init(&rt->dst.rt_uncached); in rt_del_uncached_list()
1527 spin_unlock_bh(&ul->lock); in rt_del_uncached_list()
1547 if (list_empty(&ul->head)) in rt_flush_dev()
1550 spin_lock_bh(&ul->lock); in rt_flush_dev()
1551 list_for_each_entry_safe(rt, safe, &ul->head, dst.rt_uncached) { in rt_flush_dev()
1552 if (rt->dst.dev != dev) in rt_flush_dev()
1554 rt->dst.dev = blackhole_netdev; in rt_flush_dev()
1556 &rt->dst.dev_tracker, GFP_ATOMIC); in rt_flush_dev()
1557 list_move(&rt->dst.rt_uncached, &ul->quarantine); in rt_flush_dev()
1559 spin_unlock_bh(&ul->lock); in rt_flush_dev()
1566 rt->dst.obsolete == DST_OBSOLETE_FORCE_CHK && in rt_cache_valid()
1581 if (nhc->nhc_gw_family && nhc->nhc_scope == RT_SCOPE_LINK) { in rt_set_nexthop()
1582 rt->rt_uses_gateway = 1; in rt_set_nexthop()
1583 rt->rt_gw_family = nhc->nhc_gw_family; in rt_set_nexthop()
1585 if (likely(nhc->nhc_gw_family == AF_INET)) in rt_set_nexthop()
1586 rt->rt_gw4 = nhc->nhc_gw.ipv4; in rt_set_nexthop()
1588 rt->rt_gw6 = nhc->nhc_gw.ipv6; in rt_set_nexthop()
1591 ip_dst_init_metrics(&rt->dst, fi->fib_metrics); in rt_set_nexthop()
1594 if (nhc->nhc_family == AF_INET) { in rt_set_nexthop()
1598 rt->dst.tclassid = nh->nh_tclassid; in rt_set_nexthop()
1601 rt->dst.lwtstate = lwtstate_get(nhc->nhc_lwtstate); in rt_set_nexthop()
1607 /* Routes we intend to cache in nexthop exception or in rt_set_nexthop()
1612 if (!rt->rt_gw4) { in rt_set_nexthop()
1613 rt->rt_gw_family = AF_INET; in rt_set_nexthop()
1614 rt->rt_gw4 = daddr; in rt_set_nexthop()
1623 set_class_tag(rt, res->tclassid); in rt_set_nexthop()
1639 rt->rt_genid = rt_genid_ipv4(dev_net(dev)); in rt_dst_alloc()
1640 rt->rt_flags = flags; in rt_dst_alloc()
1641 rt->rt_type = type; in rt_dst_alloc()
1642 rt->rt_is_input = 0; in rt_dst_alloc()
1643 rt->rt_iif = 0; in rt_dst_alloc()
1644 rt->rt_pmtu = 0; in rt_dst_alloc()
1645 rt->rt_mtu_locked = 0; in rt_dst_alloc()
1646 rt->rt_uses_gateway = 0; in rt_dst_alloc()
1647 rt->rt_gw_family = 0; in rt_dst_alloc()
1648 rt->rt_gw4 = 0; in rt_dst_alloc()
1650 rt->dst.output = ip_output; in rt_dst_alloc()
1652 rt->dst.input = ip_local_deliver; in rt_dst_alloc()
1664 rt->dst.flags); in rt_dst_clone()
1667 new_rt->rt_genid = rt_genid_ipv4(dev_net(dev)); in rt_dst_clone()
1668 new_rt->rt_flags = rt->rt_flags; in rt_dst_clone()
1669 new_rt->rt_type = rt->rt_type; in rt_dst_clone()
1670 new_rt->rt_is_input = rt->rt_is_input; in rt_dst_clone()
1671 new_rt->rt_iif = rt->rt_iif; in rt_dst_clone()
1672 new_rt->rt_pmtu = rt->rt_pmtu; in rt_dst_clone()
1673 new_rt->rt_mtu_locked = rt->rt_mtu_locked; in rt_dst_clone()
1674 new_rt->rt_gw_family = rt->rt_gw_family; in rt_dst_clone()
1675 if (rt->rt_gw_family == AF_INET) in rt_dst_clone()
1676 new_rt->rt_gw4 = rt->rt_gw4; in rt_dst_clone()
1677 else if (rt->rt_gw_family == AF_INET6) in rt_dst_clone()
1678 new_rt->rt_gw6 = rt->rt_gw6; in rt_dst_clone()
1680 new_rt->dst.input = rt->dst.input; in rt_dst_clone()
1681 new_rt->dst.output = rt->dst.output; in rt_dst_clone()
1682 new_rt->dst.error = rt->dst.error; in rt_dst_clone()
1683 new_rt->dst.lastuse = jiffies; in rt_dst_clone()
1684 new_rt->dst.lwtstate = lwtstate_get(rt->dst.lwtstate); in rt_dst_clone()
1699 return -EINVAL; in ip_mc_validate_source()
1702 skb->protocol != htons(ETH_P_IP)) in ip_mc_validate_source()
1703 return -EINVAL; in ip_mc_validate_source()
1706 return -EINVAL; in ip_mc_validate_source()
1710 ip_hdr(skb)->protocol != IPPROTO_IGMP) in ip_mc_validate_source()
1711 return -EINVAL; in ip_mc_validate_source()
1739 IPCB(skb)->flags |= IPSKB_NOPOLICY; in ip_route_input_mc()
1741 rth = rt_dst_alloc(dev_net(dev)->loopback_dev, flags, RTN_MULTICAST, in ip_route_input_mc()
1744 return -ENOBUFS; in ip_route_input_mc()
1747 rth->dst.tclassid = itag; in ip_route_input_mc()
1749 rth->dst.output = ip_rt_bug; in ip_route_input_mc()
1750 rth->rt_is_input= 1; in ip_route_input_mc()
1754 rth->dst.input = ip_mr_input; in ip_route_input_mc()
1759 skb_dst_set(skb, &rth->dst); in ip_route_input_mc()
1778 &daddr, &saddr, dev->name); in ip_handle_martian_source()
1779 if (dev->hard_header_len && skb_mac_header_was_set(skb)) { in ip_handle_martian_source()
1783 dev->hard_header_len, false); in ip_handle_martian_source()
1796 struct net_device *dev = nhc->nhc_dev; in __mkroute_input()
1808 return -EINVAL; in __mkroute_input()
1812 in_dev->dev, in_dev, &itag); in __mkroute_input()
1814 ip_handle_martian_source(in_dev->dev, in_dev, skb, daddr, in __mkroute_input()
1820 do_cache = res->fi && !itag; in __mkroute_input()
1822 skb->protocol == htons(ETH_P_IP)) { in __mkroute_input()
1825 gw = nhc->nhc_gw_family == AF_INET ? nhc->nhc_gw.ipv4 : 0; in __mkroute_input()
1828 IPCB(skb)->flags |= IPSKB_DOREDIRECT; in __mkroute_input()
1831 if (skb->protocol != htons(ETH_P_IP)) { in __mkroute_input()
1833 * invalid for proxy arp. DNAT routes are always valid. in __mkroute_input()
1841 err = -EINVAL; in __mkroute_input()
1847 IPCB(skb)->flags |= IPSKB_NOPOLICY; in __mkroute_input()
1852 rth = rcu_dereference(fnhe->fnhe_rth_input); in __mkroute_input()
1854 rth = rcu_dereference(nhc->nhc_rth_input); in __mkroute_input()
1856 skb_dst_set_noref(skb, &rth->dst); in __mkroute_input()
1861 rth = rt_dst_alloc(out_dev->dev, 0, res->type, in __mkroute_input()
1864 err = -ENOBUFS; in __mkroute_input()
1868 rth->rt_is_input = 1; in __mkroute_input()
1871 rth->dst.input = ip_forward; in __mkroute_input()
1873 rt_set_nexthop(rth, daddr, res, fnhe, res->fi, res->type, itag, in __mkroute_input()
1875 lwtunnel_set_redirect(&rth->dst); in __mkroute_input()
1876 skb_dst_set(skb, &rth->dst); in __mkroute_input()
1897 if (likely(outer_iph->protocol != IPPROTO_ICMP)) in ip_multipath_l3_keys()
1900 if (unlikely((outer_iph->frag_off & htons(IP_OFFSET)) != 0)) in ip_multipath_l3_keys()
1903 icmph = skb_header_pointer(skb, outer_iph->ihl * 4, sizeof(_icmph), in ip_multipath_l3_keys()
1908 if (!icmp_is_err(icmph->type)) in ip_multipath_l3_keys()
1912 outer_iph->ihl * 4 + sizeof(_icmph), in ip_multipath_l3_keys()
1919 hash_keys->addrs.v4addrs.src = key_iph->saddr; in ip_multipath_l3_keys()
1920 hash_keys->addrs.v4addrs.dst = key_iph->daddr; in ip_multipath_l3_keys()
1927 u32 hash_fields = READ_ONCE(net->ipv4.sysctl_fib_multipath_hash_fields); in fib_multipath_custom_hash_outer()
1956 u32 hash_fields = READ_ONCE(net->ipv4.sysctl_fib_multipath_hash_fields); in fib_multipath_custom_hash_inner()
2016 u32 hash_fields = READ_ONCE(net->ipv4.sysctl_fib_multipath_hash_fields); in fib_multipath_custom_hash_fl4()
2025 hash_keys.addrs.v4addrs.src = fl4->saddr; in fib_multipath_custom_hash_fl4()
2027 hash_keys.addrs.v4addrs.dst = fl4->daddr; in fib_multipath_custom_hash_fl4()
2029 hash_keys.basic.ip_proto = fl4->flowi4_proto; in fib_multipath_custom_hash_fl4()
2031 hash_keys.ports.src = fl4->fl4_sport; in fib_multipath_custom_hash_fl4()
2033 hash_keys.ports.dst = fl4->fl4_dport; in fib_multipath_custom_hash_fl4()
2042 u32 multipath_hash = fl4 ? fl4->flowi4_multipath_hash : 0; in fib_multipath_hash()
2046 switch (READ_ONCE(net->ipv4.sysctl_fib_multipath_hash_policy)) { in fib_multipath_hash()
2053 hash_keys.addrs.v4addrs.src = fl4->saddr; in fib_multipath_hash()
2054 hash_keys.addrs.v4addrs.dst = fl4->daddr; in fib_multipath_hash()
2064 /* short-circuit if we already have L4 hash present */ in fib_multipath_hash()
2065 if (skb->l4_hash) in fib_multipath_hash()
2076 hash_keys.addrs.v4addrs.src = flkeys->addrs.v4addrs.src; in fib_multipath_hash()
2077 hash_keys.addrs.v4addrs.dst = flkeys->addrs.v4addrs.dst; in fib_multipath_hash()
2078 hash_keys.ports.src = flkeys->ports.src; in fib_multipath_hash()
2079 hash_keys.ports.dst = flkeys->ports.dst; in fib_multipath_hash()
2080 hash_keys.basic.ip_proto = flkeys->basic.ip_proto; in fib_multipath_hash()
2084 hash_keys.addrs.v4addrs.src = fl4->saddr; in fib_multipath_hash()
2085 hash_keys.addrs.v4addrs.dst = fl4->daddr; in fib_multipath_hash()
2086 hash_keys.ports.src = fl4->fl4_sport; in fib_multipath_hash()
2087 hash_keys.ports.dst = fl4->fl4_dport; in fib_multipath_hash()
2088 hash_keys.basic.ip_proto = fl4->flowi4_proto; in fib_multipath_hash()
2118 hash_keys.addrs.v4addrs.src = fl4->saddr; in fib_multipath_hash()
2119 hash_keys.addrs.v4addrs.dst = fl4->daddr; in fib_multipath_hash()
2145 if (res->fi && fib_info_num_path(res->fi) > 1) { in ip_mkroute_input()
2146 int h = fib_multipath_hash(res->fi->fib_net, NULL, skb, hkeys); in ip_mkroute_input()
2149 IPCB(skb)->flags |= IPSKB_MULTIPATH; in ip_mkroute_input()
2157 /* Implements all the saddr-related checks as ip_route_input_slow(),
2168 int err = -EINVAL; in ip_route_use_hint()
2180 if (rt->rt_type != RTN_LOCAL) in ip_route_use_hint()
2197 /* get device for dst_alloc with local routes */
2201 struct fib_nh_common *nhc = res->fi ? res->nhc : NULL; in ip_rt_get_dev()
2205 dev = l3mdev_master_dev_rcu(nhc->nhc_dev); in ip_rt_get_dev()
2207 return dev ? : net->loopback_dev; in ip_rt_get_dev()
2231 int err = -EINVAL; in ip_route_input_slow()
2248 if (tun_info && !(tun_info->mode & IP_TUNNEL_INFO_TX)) in ip_route_input_slow()
2249 fl4.flowi4_tun_key.tun_id = tun_info->key.tun_id; in ip_route_input_slow()
2257 res->fi = NULL; in ip_route_input_slow()
2258 res->table = NULL; in ip_route_input_slow()
2263 * I even do not know to fix it or not. Waiting for complains :-) in ip_route_input_slow()
2287 fl4.flowi4_iif = dev->ifindex; in ip_route_input_slow()
2288 fl4.flowi4_mark = skb->mark; in ip_route_input_slow()
2308 err = -EHOSTUNREACH; in ip_route_input_slow()
2312 if (res->type == RTN_BROADCAST) { in ip_route_input_slow()
2321 if (res->type == RTN_LOCAL) { in ip_route_input_slow()
2330 err = -EHOSTUNREACH; in ip_route_input_slow()
2333 if (res->type != RTN_UNICAST) in ip_route_input_slow()
2341 if (skb->protocol != htons(ETH_P_IP)) in ip_route_input_slow()
2351 res->type = RTN_BROADCAST; in ip_route_input_slow()
2356 IPCB(skb)->flags |= IPSKB_NOPOLICY; in ip_route_input_slow()
2358 do_cache &= res->fi && !itag; in ip_route_input_slow()
2362 rth = rcu_dereference(nhc->nhc_rth_input); in ip_route_input_slow()
2364 skb_dst_set_noref(skb, &rth->dst); in ip_route_input_slow()
2371 flags | RTCF_LOCAL, res->type, false); in ip_route_input_slow()
2375 rth->dst.output= ip_rt_bug; in ip_route_input_slow()
2377 rth->dst.tclassid = itag; in ip_route_input_slow()
2379 rth->rt_is_input = 1; in ip_route_input_slow()
2382 if (res->type == RTN_UNREACHABLE) { in ip_route_input_slow()
2383 rth->dst.input= ip_error; in ip_route_input_slow()
2384 rth->dst.error= -err; in ip_route_input_slow()
2385 rth->rt_flags &= ~RTCF_LOCAL; in ip_route_input_slow()
2391 rth->dst.lwtstate = lwtstate_get(nhc->nhc_lwtstate); in ip_route_input_slow()
2392 if (lwtunnel_input_redirect(rth->dst.lwtstate)) { in ip_route_input_slow()
2393 WARN_ON(rth->dst.input == lwtunnel_input); in ip_route_input_slow()
2394 rth->dst.lwtstate->orig_input = rth->dst.input; in ip_route_input_slow()
2395 rth->dst.input = lwtunnel_input; in ip_route_input_slow()
2401 skb_dst_set(skb, &rth->dst); in ip_route_input_slow()
2407 res->type = RTN_UNREACHABLE; in ip_route_input_slow()
2408 res->fi = NULL; in ip_route_input_slow()
2409 res->table = NULL; in ip_route_input_slow()
2420 &daddr, &saddr, dev->name); in ip_route_input_slow()
2424 err = -EINVAL; in ip_route_input_slow()
2428 err = -ENOBUFS; in ip_route_input_slow()
2442 * hardware multicast filters :-( As result the host on multicasting in ip_route_input_rcu()
2454 int err = -EINVAL; in ip_route_input_rcu()
2459 ip_hdr(skb)->protocol); in ip_route_input_rcu()
2465 l3_in_dev = __in_dev_get_rcu(skb->dev); in ip_route_input_rcu()
2468 ip_hdr(skb)->protocol); in ip_route_input_rcu()
2508 struct fib_info *fi = res->fi; in __mkroute_output()
2511 u16 type = res->type; in __mkroute_output()
2517 return ERR_PTR(-EINVAL); in __mkroute_output()
2520 if (ipv4_is_loopback(fl4->saddr) && in __mkroute_output()
2521 !(dev_out->flags & IFF_LOOPBACK) && in __mkroute_output()
2523 return ERR_PTR(-EINVAL); in __mkroute_output()
2525 if (ipv4_is_lbcast(fl4->daddr)) in __mkroute_output()
2527 else if (ipv4_is_multicast(fl4->daddr)) in __mkroute_output()
2529 else if (ipv4_is_zeronet(fl4->daddr)) in __mkroute_output()
2530 return ERR_PTR(-EINVAL); in __mkroute_output()
2532 if (dev_out->flags & IFF_LOOPBACK) in __mkroute_output()
2541 if (!ip_check_mc_rcu(in_dev, fl4->daddr, fl4->saddr, in __mkroute_output()
2542 fl4->flowi4_proto)) in __mkroute_output()
2550 if (fi && res->prefixlen < 4) in __mkroute_output()
2553 (orig_oif != dev_out->ifindex)) { in __mkroute_output()
2554 /* For local routes that require a particular output interface in __mkroute_output()
2572 fnhe = find_exception(nhc, fl4->daddr); in __mkroute_output()
2576 prth = &fnhe->fnhe_rth_output; in __mkroute_output()
2578 if (unlikely(fl4->flowi4_flags & in __mkroute_output()
2580 !(nhc->nhc_gw_family && in __mkroute_output()
2581 nhc->nhc_scope == RT_SCOPE_LINK))) { in __mkroute_output()
2585 prth = raw_cpu_ptr(nhc->nhc_pcpu_rth_output); in __mkroute_output()
2588 if (rt_cache_valid(rth) && dst_hold_safe(&rth->dst)) in __mkroute_output()
2596 return ERR_PTR(-ENOBUFS); in __mkroute_output()
2598 rth->rt_iif = orig_oif; in __mkroute_output()
2604 !(dev_out->flags & IFF_LOOPBACK)) { in __mkroute_output()
2605 rth->dst.output = ip_mc_output; in __mkroute_output()
2611 !ipv4_is_local_multicast(fl4->daddr)) { in __mkroute_output()
2612 rth->dst.input = ip_mr_input; in __mkroute_output()
2613 rth->dst.output = ip_mc_output; in __mkroute_output()
2619 rt_set_nexthop(rth, fl4->daddr, res, fnhe, fi, type, 0, do_cache); in __mkroute_output()
2620 lwtunnel_set_redirect(&rth->dst); in __mkroute_output()
2640 fl4->flowi4_iif = LOOPBACK_IFINDEX; in ip_route_output_key_hash()
2656 int orig_oif = fl4->flowi4_oif; in ip_route_output_key_hash_rcu()
2661 if (fl4->saddr) { in ip_route_output_key_hash_rcu()
2662 if (ipv4_is_multicast(fl4->saddr) || in ip_route_output_key_hash_rcu()
2663 ipv4_is_lbcast(fl4->saddr) || in ip_route_output_key_hash_rcu()
2664 ipv4_is_zeronet(fl4->saddr)) { in ip_route_output_key_hash_rcu()
2665 rth = ERR_PTR(-EINVAL); in ip_route_output_key_hash_rcu()
2669 rth = ERR_PTR(-ENETUNREACH); in ip_route_output_key_hash_rcu()
2671 /* I removed check for oif == dev_out->oif here. in ip_route_output_key_hash_rcu()
2676 * of another iface. --ANK in ip_route_output_key_hash_rcu()
2679 if (fl4->flowi4_oif == 0 && in ip_route_output_key_hash_rcu()
2680 (ipv4_is_multicast(fl4->daddr) || in ip_route_output_key_hash_rcu()
2681 ipv4_is_lbcast(fl4->daddr))) { in ip_route_output_key_hash_rcu()
2683 dev_out = __ip_dev_find(net, fl4->saddr, false); in ip_route_output_key_hash_rcu()
2702 fl4->flowi4_oif = dev_out->ifindex; in ip_route_output_key_hash_rcu()
2706 if (!(fl4->flowi4_flags & FLOWI_FLAG_ANYSRC)) { in ip_route_output_key_hash_rcu()
2708 if (!__ip_dev_find(net, fl4->saddr, false)) in ip_route_output_key_hash_rcu()
2714 if (fl4->flowi4_oif) { in ip_route_output_key_hash_rcu()
2715 dev_out = dev_get_by_index_rcu(net, fl4->flowi4_oif); in ip_route_output_key_hash_rcu()
2716 rth = ERR_PTR(-ENODEV); in ip_route_output_key_hash_rcu()
2721 if (!(dev_out->flags & IFF_UP) || !__in_dev_get_rcu(dev_out)) { in ip_route_output_key_hash_rcu()
2722 rth = ERR_PTR(-ENETUNREACH); in ip_route_output_key_hash_rcu()
2725 if (ipv4_is_local_multicast(fl4->daddr) || in ip_route_output_key_hash_rcu()
2726 ipv4_is_lbcast(fl4->daddr) || in ip_route_output_key_hash_rcu()
2727 fl4->flowi4_proto == IPPROTO_IGMP) { in ip_route_output_key_hash_rcu()
2728 if (!fl4->saddr) in ip_route_output_key_hash_rcu()
2729 fl4->saddr = inet_select_addr(dev_out, 0, in ip_route_output_key_hash_rcu()
2733 if (!fl4->saddr) { in ip_route_output_key_hash_rcu()
2734 if (ipv4_is_multicast(fl4->daddr)) in ip_route_output_key_hash_rcu()
2735 fl4->saddr = inet_select_addr(dev_out, 0, in ip_route_output_key_hash_rcu()
2736 fl4->flowi4_scope); in ip_route_output_key_hash_rcu()
2737 else if (!fl4->daddr) in ip_route_output_key_hash_rcu()
2738 fl4->saddr = inet_select_addr(dev_out, 0, in ip_route_output_key_hash_rcu()
2743 if (!fl4->daddr) { in ip_route_output_key_hash_rcu()
2744 fl4->daddr = fl4->saddr; in ip_route_output_key_hash_rcu()
2745 if (!fl4->daddr) in ip_route_output_key_hash_rcu()
2746 fl4->daddr = fl4->saddr = htonl(INADDR_LOOPBACK); in ip_route_output_key_hash_rcu()
2747 dev_out = net->loopback_dev; in ip_route_output_key_hash_rcu()
2748 fl4->flowi4_oif = LOOPBACK_IFINDEX; in ip_route_output_key_hash_rcu()
2749 res->type = RTN_LOCAL; in ip_route_output_key_hash_rcu()
2756 res->fi = NULL; in ip_route_output_key_hash_rcu()
2757 res->table = NULL; in ip_route_output_key_hash_rcu()
2758 if (fl4->flowi4_oif && in ip_route_output_key_hash_rcu()
2759 (ipv4_is_multicast(fl4->daddr) || !fl4->flowi4_l3mdev)) { in ip_route_output_key_hash_rcu()
2765 * even if it has NO routes and NO assigned in ip_route_output_key_hash_rcu()
2771 * and ifaddr state. --ANK in ip_route_output_key_hash_rcu()
2778 if (fl4->saddr == 0) in ip_route_output_key_hash_rcu()
2779 fl4->saddr = inet_select_addr(dev_out, 0, in ip_route_output_key_hash_rcu()
2781 res->type = RTN_UNICAST; in ip_route_output_key_hash_rcu()
2788 if (res->type == RTN_LOCAL) { in ip_route_output_key_hash_rcu()
2789 if (!fl4->saddr) { in ip_route_output_key_hash_rcu()
2790 if (res->fi->fib_prefsrc) in ip_route_output_key_hash_rcu()
2791 fl4->saddr = res->fi->fib_prefsrc; in ip_route_output_key_hash_rcu()
2793 fl4->saddr = fl4->daddr; in ip_route_output_key_hash_rcu()
2798 net->loopback_dev; in ip_route_output_key_hash_rcu()
2801 * though packet rx/tx happens over loopback or l3mdev in ip_route_output_key_hash_rcu()
2805 fl4->flowi4_oif = dev_out->ifindex; in ip_route_output_key_hash_rcu()
2839 struct dst_entry *new = &rt->dst; in ipv4_blackhole_route()
2841 new->__use = 1; in ipv4_blackhole_route()
2842 new->input = dst_discard; in ipv4_blackhole_route()
2843 new->output = dst_discard_out; in ipv4_blackhole_route()
2845 new->dev = net->loopback_dev; in ipv4_blackhole_route()
2846 netdev_hold(new->dev, &new->dev_tracker, GFP_ATOMIC); in ipv4_blackhole_route()
2848 rt->rt_is_input = ort->rt_is_input; in ipv4_blackhole_route()
2849 rt->rt_iif = ort->rt_iif; in ipv4_blackhole_route()
2850 rt->rt_pmtu = ort->rt_pmtu; in ipv4_blackhole_route()
2851 rt->rt_mtu_locked = ort->rt_mtu_locked; in ipv4_blackhole_route()
2853 rt->rt_genid = rt_genid_ipv4(net); in ipv4_blackhole_route()
2854 rt->rt_flags = ort->rt_flags; in ipv4_blackhole_route()
2855 rt->rt_type = ort->rt_type; in ipv4_blackhole_route()
2856 rt->rt_uses_gateway = ort->rt_uses_gateway; in ipv4_blackhole_route()
2857 rt->rt_gw_family = ort->rt_gw_family; in ipv4_blackhole_route()
2858 if (rt->rt_gw_family == AF_INET) in ipv4_blackhole_route()
2859 rt->rt_gw4 = ort->rt_gw4; in ipv4_blackhole_route()
2860 else if (rt->rt_gw_family == AF_INET6) in ipv4_blackhole_route()
2861 rt->rt_gw6 = ort->rt_gw6; in ipv4_blackhole_route()
2866 return rt ? &rt->dst : ERR_PTR(-ENOMEM); in ipv4_blackhole_route()
2877 if (flp4->flowi4_proto) { in ip_route_output_flow()
2878 flp4->flowi4_oif = rt->dst.dev->ifindex; in ip_route_output_flow()
2879 rt = (struct rtable *)xfrm_lookup_route(net, &rt->dst, in ip_route_output_flow()
2902 dst_cache = (struct dst_cache *)&info->dst_cache; in ip_route_output_tunnel()
2910 fl4.flowi4_mark = skb->mark; in ip_route_output_tunnel()
2912 fl4.daddr = info->key.u.ipv4.dst; in ip_route_output_tunnel()
2913 fl4.saddr = info->key.u.ipv4.src; in ip_route_output_tunnel()
2914 tos = info->key.tos; in ip_route_output_tunnel()
2920 return ERR_PTR(-ENETUNREACH); in ip_route_output_tunnel()
2922 if (rt->dst.dev == dev) { /* is this necessary? */ in ip_route_output_tunnel()
2925 return ERR_PTR(-ELOOP); in ip_route_output_tunnel()
2929 dst_cache_set_ip4(dst_cache, &rt->dst, fl4.saddr); in ip_route_output_tunnel()
2950 return -EMSGSIZE; in rt_fill_info()
2953 r->rtm_family = AF_INET; in rt_fill_info()
2954 r->rtm_dst_len = 32; in rt_fill_info()
2955 r->rtm_src_len = 0; in rt_fill_info()
2956 r->rtm_tos = fl4 ? fl4->flowi4_tos : 0; in rt_fill_info()
2957 r->rtm_table = table_id < 256 ? table_id : RT_TABLE_COMPAT; in rt_fill_info()
2960 r->rtm_type = rt->rt_type; in rt_fill_info()
2961 r->rtm_scope = RT_SCOPE_UNIVERSE; in rt_fill_info()
2962 r->rtm_protocol = RTPROT_UNSPEC; in rt_fill_info()
2963 r->rtm_flags = (rt->rt_flags & ~0xFFFF) | RTM_F_CLONED; in rt_fill_info()
2964 if (rt->rt_flags & RTCF_NOTIFY) in rt_fill_info()
2965 r->rtm_flags |= RTM_F_NOTIFY; in rt_fill_info()
2966 if (IPCB(skb)->flags & IPSKB_DOREDIRECT) in rt_fill_info()
2967 r->rtm_flags |= RTCF_DOREDIRECT; in rt_fill_info()
2972 r->rtm_src_len = 32; in rt_fill_info()
2976 if (rt->dst.dev && in rt_fill_info()
2977 nla_put_u32(skb, RTA_OIF, rt->dst.dev->ifindex)) in rt_fill_info()
2979 if (rt->dst.lwtstate && in rt_fill_info()
2980 lwtunnel_fill_encap(skb, rt->dst.lwtstate, RTA_ENCAP, RTA_ENCAP_TYPE) < 0) in rt_fill_info()
2983 if (rt->dst.tclassid && in rt_fill_info()
2984 nla_put_u32(skb, RTA_FLOW, rt->dst.tclassid)) in rt_fill_info()
2988 fl4->saddr != src) { in rt_fill_info()
2989 if (nla_put_in_addr(skb, RTA_PREFSRC, fl4->saddr)) in rt_fill_info()
2992 if (rt->rt_uses_gateway) { in rt_fill_info()
2993 if (rt->rt_gw_family == AF_INET && in rt_fill_info()
2994 nla_put_in_addr(skb, RTA_GATEWAY, rt->rt_gw4)) { in rt_fill_info()
2996 } else if (rt->rt_gw_family == AF_INET6) { in rt_fill_info()
3006 via->rtvia_family = AF_INET6; in rt_fill_info()
3007 memcpy(via->rtvia_addr, &rt->rt_gw6, alen); in rt_fill_info()
3011 expires = rt->dst.expires; in rt_fill_info()
3016 expires -= now; in rt_fill_info()
3021 memcpy(metrics, dst_metrics_ptr(&rt->dst), sizeof(metrics)); in rt_fill_info()
3022 if (rt->rt_pmtu && expires) in rt_fill_info()
3023 metrics[RTAX_MTU - 1] = rt->rt_pmtu; in rt_fill_info()
3024 if (rt->rt_mtu_locked && expires) in rt_fill_info()
3025 metrics[RTAX_LOCK - 1] |= BIT(RTAX_MTU); in rt_fill_info()
3030 if (fl4->flowi4_mark && in rt_fill_info()
3031 nla_put_u32(skb, RTA_MARK, fl4->flowi4_mark)) in rt_fill_info()
3034 if (!uid_eq(fl4->flowi4_uid, INVALID_UID) && in rt_fill_info()
3037 fl4->flowi4_uid))) in rt_fill_info()
3046 fl4->saddr, fl4->daddr, in rt_fill_info()
3056 if (nla_put_u32(skb, RTA_IIF, fl4->flowi4_iif)) in rt_fill_info()
3061 error = rt->dst.error; in rt_fill_info()
3063 if (rtnl_put_cacheinfo(skb, &rt->dst, 0, expires, error) < 0) in rt_fill_info()
3071 return -EMSGSIZE; in rt_fill_info()
3085 fnhe = rcu_dereference(fnhe->fnhe_next)) { in fnhe_dump_bucket()
3092 if (fnhe->fnhe_genid != genid) in fnhe_dump_bucket()
3095 if (fnhe->fnhe_expires && in fnhe_dump_bucket()
3096 time_after(jiffies, fnhe->fnhe_expires)) in fnhe_dump_bucket()
3099 rt = rcu_dereference(fnhe->fnhe_rth_input); in fnhe_dump_bucket()
3101 rt = rcu_dereference(fnhe->fnhe_rth_output); in fnhe_dump_bucket()
3105 err = rt_fill_info(net, fnhe->fnhe_daddr, 0, rt, in fnhe_dump_bucket()
3107 NETLINK_CB(cb->skb).portid, in fnhe_dump_bucket()
3108 cb->nlh->nlmsg_seq, flags); in fnhe_dump_bucket()
3123 struct net *net = sock_net(cb->skb->sk); in fib_dump_info_fnhe()
3131 if (nhc->nhc_flags & RTNH_F_DEAD) in fib_dump_info_fnhe()
3135 bucket = rcu_dereference(nhc->nhc_exceptions); in fib_dump_info_fnhe()
3165 skb->protocol = htons(ETH_P_IP); in inet_rtm_getroute_build_skb()
3167 iph->protocol = ip_proto; in inet_rtm_getroute_build_skb()
3168 iph->saddr = src; in inet_rtm_getroute_build_skb()
3169 iph->daddr = dst; in inet_rtm_getroute_build_skb()
3170 iph->version = 0x4; in inet_rtm_getroute_build_skb()
3171 iph->frag_off = 0; in inet_rtm_getroute_build_skb()
3172 iph->ihl = 0x5; in inet_rtm_getroute_build_skb()
3173 skb_set_transport_header(skb, skb->len); in inet_rtm_getroute_build_skb()
3175 switch (iph->protocol) { in inet_rtm_getroute_build_skb()
3180 udph->source = sport; in inet_rtm_getroute_build_skb()
3181 udph->dest = dport; in inet_rtm_getroute_build_skb()
3182 udph->len = htons(sizeof(struct udphdr)); in inet_rtm_getroute_build_skb()
3183 udph->check = 0; in inet_rtm_getroute_build_skb()
3190 tcph->source = sport; in inet_rtm_getroute_build_skb()
3191 tcph->dest = dport; in inet_rtm_getroute_build_skb()
3192 tcph->doff = sizeof(struct tcphdr) / 4; in inet_rtm_getroute_build_skb()
3193 tcph->rst = 1; in inet_rtm_getroute_build_skb()
3194 tcph->check = ~tcp_v4_check(sizeof(struct tcphdr), in inet_rtm_getroute_build_skb()
3202 icmph->type = ICMP_ECHO; in inet_rtm_getroute_build_skb()
3203 icmph->code = 0; in inet_rtm_getroute_build_skb()
3218 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*rtm))) { in inet_rtm_valid_getroute_req()
3221 return -EINVAL; in inet_rtm_valid_getroute_req()
3229 if ((rtm->rtm_src_len && rtm->rtm_src_len != 32) || in inet_rtm_valid_getroute_req()
3230 (rtm->rtm_dst_len && rtm->rtm_dst_len != 32) || in inet_rtm_valid_getroute_req()
3231 rtm->rtm_table || rtm->rtm_protocol || in inet_rtm_valid_getroute_req()
3232 rtm->rtm_scope || rtm->rtm_type) { in inet_rtm_valid_getroute_req()
3234 return -EINVAL; in inet_rtm_valid_getroute_req()
3237 if (rtm->rtm_flags & ~(RTM_F_NOTIFY | in inet_rtm_valid_getroute_req()
3241 return -EINVAL; in inet_rtm_valid_getroute_req()
3249 if ((tb[RTA_SRC] && !rtm->rtm_src_len) || in inet_rtm_valid_getroute_req()
3250 (tb[RTA_DST] && !rtm->rtm_dst_len)) { in inet_rtm_valid_getroute_req()
3252 return -EINVAL; in inet_rtm_valid_getroute_req()
3272 return -EINVAL; in inet_rtm_valid_getroute_req()
3282 struct net *net = sock_net(in_skb->sk); in inet_rtm_getroute()
3328 return -ENOBUFS; in inet_rtm_getroute()
3332 fl4.flowi4_tos = rtm->rtm_tos & IPTOS_RT_MASK; in inet_rtm_getroute()
3349 err = -ENODEV; in inet_rtm_getroute()
3354 skb->dev = dev; in inet_rtm_getroute()
3355 skb->mark = mark; in inet_rtm_getroute()
3357 rtm->rtm_tos & IPTOS_RT_MASK, dev, in inet_rtm_getroute()
3361 if (err == 0 && rt->dst.error) in inet_rtm_getroute()
3362 err = -rt->dst.error; in inet_rtm_getroute()
3365 skb->dev = net->loopback_dev; in inet_rtm_getroute()
3371 skb_dst_set(skb, &rt->dst); in inet_rtm_getroute()
3377 if (rtm->rtm_flags & RTM_F_NOTIFY) in inet_rtm_getroute()
3378 rt->rt_flags |= RTCF_NOTIFY; in inet_rtm_getroute()
3380 if (rtm->rtm_flags & RTM_F_LOOKUP_TABLE) in inet_rtm_getroute()
3381 table_id = res.table ? res.table->tb_id : 0; in inet_rtm_getroute()
3389 if (rtm->rtm_flags & RTM_F_FIB_MATCH) { in inet_rtm_getroute()
3395 err = -EHOSTUNREACH; in inet_rtm_getroute()
3403 fri.type = rt->rt_type; in inet_rtm_getroute()
3411 u8 slen = 32 - fri.dst_len; in inet_rtm_getroute()
3413 if (fa->fa_slen == slen && in inet_rtm_getroute()
3414 fa->tb_id == fri.tb_id && in inet_rtm_getroute()
3415 fa->fa_dscp == fri.dscp && in inet_rtm_getroute()
3416 fa->fa_info == res.fi && in inet_rtm_getroute()
3417 fa->fa_type == fri.type) { in inet_rtm_getroute()
3418 fri.offload = READ_ONCE(fa->offload); in inet_rtm_getroute()
3419 fri.trap = READ_ONCE(fa->trap); in inet_rtm_getroute()
3421 READ_ONCE(fa->offload_failed); in inet_rtm_getroute()
3427 nlh->nlmsg_seq, RTM_NEWROUTE, &fri, 0); in inet_rtm_getroute()
3431 nlh->nlmsg_seq, 0); in inet_rtm_getroute()
3450 rt_cache_flush(dev_net(in_dev->dev)); in ip_rt_multicast_event()
3462 struct net *net = (struct net *)__ctl->extra1; in ipv4_sysctl_rtcache_flush()
3470 return -EINVAL; in ipv4_sysctl_rtcache_flush()
3610 /* Don't export non-whitelisted sysctls to unprivileged users */ in sysctl_route_net_init()
3611 if (net->user_ns != &init_user_ns) { in sysctl_route_net_init()
3621 for (i = 1; i < ARRAY_SIZE(ipv4_route_netns_table) - 1; i++) in sysctl_route_net_init()
3622 tbl[i].data += (void *)net - (void *)&init_net; in sysctl_route_net_init()
3626 net->ipv4.route_hdr = register_net_sysctl_sz(net, "net/ipv4/route", in sysctl_route_net_init()
3628 if (!net->ipv4.route_hdr) in sysctl_route_net_init()
3636 return -ENOMEM; in sysctl_route_net_init()
3643 tbl = net->ipv4.route_hdr->ctl_table_arg; in sysctl_route_net_exit()
3644 unregister_net_sysctl_table(net->ipv4.route_hdr); in sysctl_route_net_exit()
3658 net->ipv4.ip_rt_min_pmtu = DEFAULT_MIN_PMTU; in netns_ip_rt_init()
3659 net->ipv4.ip_rt_mtu_expires = DEFAULT_MTU_EXPIRES; in netns_ip_rt_init()
3660 net->ipv4.ip_rt_min_advmss = DEFAULT_MIN_ADVMSS; in netns_ip_rt_init()
3670 atomic_set(&net->ipv4.rt_genid, 0); in rt_genid_init()
3671 atomic_set(&net->fnhe_genid, 0); in rt_genid_init()
3672 atomic_set(&net->ipv4.dev_addr_genid, get_random_u32()); in rt_genid_init()
3685 return -ENOMEM; in ipv4_inetpeer_init()
3687 net->ipv4.peers = bp; in ipv4_inetpeer_init()
3693 struct inet_peer_base *bp = net->ipv4.peers; in ipv4_inetpeer_exit()
3695 net->ipv4.peers = NULL; in ipv4_inetpeer_exit()
3734 INIT_LIST_HEAD(&ul->head); in ip_rt_init()
3735 INIT_LIST_HEAD(&ul->quarantine); in ip_rt_init()
3736 spin_lock_init(&ul->lock); in ip_rt_init()