1c9422999SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 20e6fbc5bSPravin B Shelar /* 30e6fbc5bSPravin B Shelar * Copyright (c) 2013 Nicira, Inc. 40e6fbc5bSPravin B Shelar */ 50e6fbc5bSPravin B Shelar 60e6fbc5bSPravin B Shelar #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 70e6fbc5bSPravin B Shelar 80e6fbc5bSPravin B Shelar #include <linux/types.h> 90e6fbc5bSPravin B Shelar #include <linux/kernel.h> 100e6fbc5bSPravin B Shelar #include <linux/skbuff.h> 110e6fbc5bSPravin B Shelar #include <linux/netdevice.h> 120e6fbc5bSPravin B Shelar #include <linux/in.h> 130e6fbc5bSPravin B Shelar #include <linux/if_arp.h> 140e6fbc5bSPravin B Shelar #include <linux/init.h> 150e6fbc5bSPravin B Shelar #include <linux/in6.h> 160e6fbc5bSPravin B Shelar #include <linux/inetdevice.h> 170e6fbc5bSPravin B Shelar #include <linux/netfilter_ipv4.h> 180e6fbc5bSPravin B Shelar #include <linux/etherdevice.h> 190e6fbc5bSPravin B Shelar #include <linux/if_ether.h> 200e6fbc5bSPravin B Shelar #include <linux/if_vlan.h> 21e7030878SThomas Graf #include <linux/static_key.h> 220e6fbc5bSPravin B Shelar 230e6fbc5bSPravin B Shelar #include <net/ip.h> 240e6fbc5bSPravin B Shelar #include <net/icmp.h> 250e6fbc5bSPravin B Shelar #include <net/protocol.h> 260e6fbc5bSPravin B Shelar #include <net/ip_tunnels.h> 27058214a4STom Herbert #include <net/ip6_tunnel.h> 280e6fbc5bSPravin B Shelar #include <net/arp.h> 290e6fbc5bSPravin B Shelar #include <net/checksum.h> 300e6fbc5bSPravin B Shelar #include <net/dsfield.h> 310e6fbc5bSPravin B Shelar #include <net/inet_ecn.h> 320e6fbc5bSPravin B Shelar #include <net/xfrm.h> 330e6fbc5bSPravin B Shelar #include <net/net_namespace.h> 340e6fbc5bSPravin B Shelar #include <net/netns/generic.h> 350e6fbc5bSPravin B Shelar #include <net/rtnetlink.h> 3663d008a4SJiri Benc #include <net/dst_metadata.h> 374ece4778SXin Long #include <net/geneve.h> 380e6fbc5bSPravin B Shelar 3955c2bc14STom Herbert const struct ip_tunnel_encap_ops __rcu * 4055c2bc14STom Herbert iptun_encaps[MAX_IPTUN_ENCAP_OPS] __read_mostly; 4155c2bc14STom Herbert EXPORT_SYMBOL(iptun_encaps); 4255c2bc14STom Herbert 43058214a4STom Herbert const struct ip6_tnl_encap_ops __rcu * 44058214a4STom Herbert ip6tun_encaps[MAX_IPTUN_ENCAP_OPS] __read_mostly; 45058214a4STom Herbert EXPORT_SYMBOL(ip6tun_encaps); 46058214a4STom Herbert 47039f5062SPravin B Shelar void iptunnel_xmit(struct sock *sk, struct rtable *rt, struct sk_buff *skb, 480e6fbc5bSPravin B Shelar __be32 src, __be32 dst, __u8 proto, 49963a88b3SNicolas Dichtel __u8 tos, __u8 ttl, __be16 df, bool xnet) 500e6fbc5bSPravin B Shelar { 51bc22a0e2SNicolas Dichtel int pkt_len = skb->len - skb_inner_network_offset(skb); 52f859b0f6SEric W. Biederman struct net *net = dev_net(rt->dst.dev); 53039f5062SPravin B Shelar struct net_device *dev = skb->dev; 540e6fbc5bSPravin B Shelar struct iphdr *iph; 550e6fbc5bSPravin B Shelar int err; 560e6fbc5bSPravin B Shelar 57963a88b3SNicolas Dichtel skb_scrub_packet(skb, xnet); 58963a88b3SNicolas Dichtel 59bf8d85d4SEric Dumazet skb_clear_hash_if_not_l4(skb); 600e6fbc5bSPravin B Shelar skb_dst_set(skb, &rt->dst); 610e6fbc5bSPravin B Shelar memset(IPCB(skb), 0, sizeof(*IPCB(skb))); 620e6fbc5bSPravin B Shelar 630e6fbc5bSPravin B Shelar /* Push down and install the IP header. */ 6478a3694dSSteffen Klassert skb_push(skb, sizeof(struct iphdr)); 650e6fbc5bSPravin B Shelar skb_reset_network_header(skb); 660e6fbc5bSPravin B Shelar 670e6fbc5bSPravin B Shelar iph = ip_hdr(skb); 680e6fbc5bSPravin B Shelar 690e6fbc5bSPravin B Shelar iph->version = 4; 700e6fbc5bSPravin B Shelar iph->ihl = sizeof(struct iphdr) >> 2; 7116f7eb2bSSabrina Dubroca iph->frag_off = ip_mtu_locked(&rt->dst) ? 0 : df; 720e6fbc5bSPravin B Shelar iph->protocol = proto; 730e6fbc5bSPravin B Shelar iph->tos = tos; 740e6fbc5bSPravin B Shelar iph->daddr = dst; 750e6fbc5bSPravin B Shelar iph->saddr = src; 760e6fbc5bSPravin B Shelar iph->ttl = ttl; 77f859b0f6SEric W. Biederman __ip_select_ident(net, iph, skb_shinfo(skb)->gso_segs ?: 1); 780e6fbc5bSPravin B Shelar 7933224b16SEric W. Biederman err = ip_local_out(net, sk, skb); 805684abf7SXin Long 815684abf7SXin Long if (dev) { 820e6fbc5bSPravin B Shelar if (unlikely(net_xmit_eval(err))) 830e6fbc5bSPravin B Shelar pkt_len = 0; 84039f5062SPravin B Shelar iptunnel_xmit_stats(dev, pkt_len); 850e6fbc5bSPravin B Shelar } 865684abf7SXin Long } 870e6fbc5bSPravin B Shelar EXPORT_SYMBOL_GPL(iptunnel_xmit); 883d7b46cdSPravin B Shelar 89a6d5bbf3SJiri Benc int __iptunnel_pull_header(struct sk_buff *skb, int hdr_len, 90a6d5bbf3SJiri Benc __be16 inner_proto, bool raw_proto, bool xnet) 913d7b46cdSPravin B Shelar { 923d7b46cdSPravin B Shelar if (unlikely(!pskb_may_pull(skb, hdr_len))) 933d7b46cdSPravin B Shelar return -ENOMEM; 943d7b46cdSPravin B Shelar 953d7b46cdSPravin B Shelar skb_pull_rcsum(skb, hdr_len); 963d7b46cdSPravin B Shelar 97a6d5bbf3SJiri Benc if (!raw_proto && inner_proto == htons(ETH_P_TEB)) { 981245dfc8SLi RongQing struct ethhdr *eh; 993d7b46cdSPravin B Shelar 1003d7b46cdSPravin B Shelar if (unlikely(!pskb_may_pull(skb, ETH_HLEN))) 1013d7b46cdSPravin B Shelar return -ENOMEM; 1023d7b46cdSPravin B Shelar 1031245dfc8SLi RongQing eh = (struct ethhdr *)skb->data; 104d181ddcaSAlexander Duyck if (likely(eth_proto_is_802_3(eh->h_proto))) 1053d7b46cdSPravin B Shelar skb->protocol = eh->h_proto; 1063d7b46cdSPravin B Shelar else 1073d7b46cdSPravin B Shelar skb->protocol = htons(ETH_P_802_2); 1083d7b46cdSPravin B Shelar 1093d7b46cdSPravin B Shelar } else { 1103d7b46cdSPravin B Shelar skb->protocol = inner_proto; 1113d7b46cdSPravin B Shelar } 1123d7b46cdSPravin B Shelar 1137539fadcSTom Herbert skb_clear_hash_if_not_l4(skb); 1143e2ed0c2SMichał Mirosław __vlan_hwaccel_clear_tag(skb); 1153d7b46cdSPravin B Shelar skb_set_queue_mapping(skb, 0); 1167f290c94SJiri Benc skb_scrub_packet(skb, xnet); 117a09a4c8dSJesse Gross 118a09a4c8dSJesse Gross return iptunnel_pull_offloads(skb); 1193d7b46cdSPravin B Shelar } 120a6d5bbf3SJiri Benc EXPORT_SYMBOL_GPL(__iptunnel_pull_header); 1212d26f0a3SEric Dumazet 12263d008a4SJiri Benc struct metadata_dst *iptunnel_metadata_reply(struct metadata_dst *md, 12363d008a4SJiri Benc gfp_t flags) 12463d008a4SJiri Benc { 12563d008a4SJiri Benc struct metadata_dst *res; 12663d008a4SJiri Benc struct ip_tunnel_info *dst, *src; 12763d008a4SJiri Benc 1283fcece12SJakub Kicinski if (!md || md->type != METADATA_IP_TUNNEL || 1293fcece12SJakub Kicinski md->u.tun_info.mode & IP_TUNNEL_INFO_TX) 13063d008a4SJiri Benc return NULL; 13163d008a4SJiri Benc 132f52f11ecSXin Long src = &md->u.tun_info; 133f52f11ecSXin Long res = metadata_dst_alloc(src->options_len, METADATA_IP_TUNNEL, flags); 13463d008a4SJiri Benc if (!res) 13563d008a4SJiri Benc return NULL; 13663d008a4SJiri Benc 13763d008a4SJiri Benc dst = &res->u.tun_info; 13863d008a4SJiri Benc dst->key.tun_id = src->key.tun_id; 13963d008a4SJiri Benc if (src->mode & IP_TUNNEL_INFO_IPV6) 14063d008a4SJiri Benc memcpy(&dst->key.u.ipv6.dst, &src->key.u.ipv6.src, 14163d008a4SJiri Benc sizeof(struct in6_addr)); 14263d008a4SJiri Benc else 14363d008a4SJiri Benc dst->key.u.ipv4.dst = src->key.u.ipv4.src; 1447bdca378Swenxu dst->key.tun_flags = src->key.tun_flags; 14563d008a4SJiri Benc dst->mode = src->mode | IP_TUNNEL_INFO_TX; 146f52f11ecSXin Long ip_tunnel_info_opts_set(dst, ip_tunnel_info_opts(src), 147f52f11ecSXin Long src->options_len, 0); 14863d008a4SJiri Benc 14963d008a4SJiri Benc return res; 15063d008a4SJiri Benc } 15163d008a4SJiri Benc EXPORT_SYMBOL_GPL(iptunnel_metadata_reply); 15263d008a4SJiri Benc 153aed069dfSAlexander Duyck int iptunnel_handle_offloads(struct sk_buff *skb, 1542d26f0a3SEric Dumazet int gso_type_mask) 1552d26f0a3SEric Dumazet { 1562d26f0a3SEric Dumazet int err; 1572d26f0a3SEric Dumazet 1582d26f0a3SEric Dumazet if (likely(!skb->encapsulation)) { 1592d26f0a3SEric Dumazet skb_reset_inner_headers(skb); 1602d26f0a3SEric Dumazet skb->encapsulation = 1; 1612d26f0a3SEric Dumazet } 1622d26f0a3SEric Dumazet 1632d26f0a3SEric Dumazet if (skb_is_gso(skb)) { 1649580bf2eSEric Dumazet err = skb_header_unclone(skb, GFP_ATOMIC); 1652d26f0a3SEric Dumazet if (unlikely(err)) 166aed069dfSAlexander Duyck return err; 1672d26f0a3SEric Dumazet skb_shinfo(skb)->gso_type |= gso_type_mask; 168aed069dfSAlexander Duyck return 0; 1692d26f0a3SEric Dumazet } 1702d26f0a3SEric Dumazet 1716fa79666SEdward Cree if (skb->ip_summed != CHECKSUM_PARTIAL) { 1722d26f0a3SEric Dumazet skb->ip_summed = CHECKSUM_NONE; 1736fa79666SEdward Cree /* We clear encapsulation here to prevent badly-written 1746fa79666SEdward Cree * drivers potentially deciding to offload an inner checksum 1756fa79666SEdward Cree * if we set CHECKSUM_PARTIAL on the outer header. 1766fa79666SEdward Cree * This should go away when the drivers are all fixed. 1776fa79666SEdward Cree */ 178179bc67fSEdward Cree skb->encapsulation = 0; 179179bc67fSEdward Cree } 1802d26f0a3SEric Dumazet 181aed069dfSAlexander Duyck return 0; 1822d26f0a3SEric Dumazet } 1832d26f0a3SEric Dumazet EXPORT_SYMBOL_GPL(iptunnel_handle_offloads); 184ebe44f35SDavid S. Miller 185ebe44f35SDavid S. Miller /* Often modified stats are per cpu, other are shared (netdev->stats) */ 186bc1f4470Sstephen hemminger void ip_tunnel_get_stats64(struct net_device *dev, 187ebe44f35SDavid S. Miller struct rtnl_link_stats64 *tot) 188ebe44f35SDavid S. Miller { 189ebe44f35SDavid S. Miller int i; 190ebe44f35SDavid S. Miller 191c24a5964SAlexander Duyck netdev_stats_to_stats64(tot, &dev->stats); 192c24a5964SAlexander Duyck 193ebe44f35SDavid S. Miller for_each_possible_cpu(i) { 194ebe44f35SDavid S. Miller const struct pcpu_sw_netstats *tstats = 195ebe44f35SDavid S. Miller per_cpu_ptr(dev->tstats, i); 196ebe44f35SDavid S. Miller u64 rx_packets, rx_bytes, tx_packets, tx_bytes; 197ebe44f35SDavid S. Miller unsigned int start; 198ebe44f35SDavid S. Miller 199ebe44f35SDavid S. Miller do { 20057a7744eSEric W. Biederman start = u64_stats_fetch_begin_irq(&tstats->syncp); 201ebe44f35SDavid S. Miller rx_packets = tstats->rx_packets; 202ebe44f35SDavid S. Miller tx_packets = tstats->tx_packets; 203ebe44f35SDavid S. Miller rx_bytes = tstats->rx_bytes; 204ebe44f35SDavid S. Miller tx_bytes = tstats->tx_bytes; 20557a7744eSEric W. Biederman } while (u64_stats_fetch_retry_irq(&tstats->syncp, start)); 206ebe44f35SDavid S. Miller 207ebe44f35SDavid S. Miller tot->rx_packets += rx_packets; 208ebe44f35SDavid S. Miller tot->tx_packets += tx_packets; 209ebe44f35SDavid S. Miller tot->rx_bytes += rx_bytes; 210ebe44f35SDavid S. Miller tot->tx_bytes += tx_bytes; 211ebe44f35SDavid S. Miller } 212ebe44f35SDavid S. Miller } 213ebe44f35SDavid S. Miller EXPORT_SYMBOL_GPL(ip_tunnel_get_stats64); 2143093fbe7SThomas Graf 215a1c234f9SJiri Benc static const struct nla_policy ip_tun_policy[LWTUNNEL_IP_MAX + 1] = { 216a1c234f9SJiri Benc [LWTUNNEL_IP_ID] = { .type = NLA_U64 }, 217a1c234f9SJiri Benc [LWTUNNEL_IP_DST] = { .type = NLA_U32 }, 218a1c234f9SJiri Benc [LWTUNNEL_IP_SRC] = { .type = NLA_U32 }, 219a1c234f9SJiri Benc [LWTUNNEL_IP_TTL] = { .type = NLA_U8 }, 220a1c234f9SJiri Benc [LWTUNNEL_IP_TOS] = { .type = NLA_U8 }, 221a1c234f9SJiri Benc [LWTUNNEL_IP_FLAGS] = { .type = NLA_U16 }, 2224ece4778SXin Long [LWTUNNEL_IP_OPTS] = { .type = NLA_NESTED }, 2233093fbe7SThomas Graf }; 2243093fbe7SThomas Graf 2254ece4778SXin Long static const struct nla_policy ip_opts_policy[LWTUNNEL_IP_OPTS_MAX + 1] = { 2264ece4778SXin Long [LWTUNNEL_IP_OPTS_GENEVE] = { .type = NLA_NESTED }, 2274ece4778SXin Long }; 2284ece4778SXin Long 2294ece4778SXin Long static const struct nla_policy 2304ece4778SXin Long geneve_opt_policy[LWTUNNEL_IP_OPT_GENEVE_MAX + 1] = { 2314ece4778SXin Long [LWTUNNEL_IP_OPT_GENEVE_CLASS] = { .type = NLA_U16 }, 2324ece4778SXin Long [LWTUNNEL_IP_OPT_GENEVE_TYPE] = { .type = NLA_U8 }, 2334ece4778SXin Long [LWTUNNEL_IP_OPT_GENEVE_DATA] = { .type = NLA_BINARY, .len = 128 }, 2344ece4778SXin Long }; 2354ece4778SXin Long 2364ece4778SXin Long static int ip_tun_parse_opts_geneve(struct nlattr *attr, 2374ece4778SXin Long struct ip_tunnel_info *info, 2384ece4778SXin Long struct netlink_ext_ack *extack) 2394ece4778SXin Long { 2404ece4778SXin Long struct nlattr *tb[LWTUNNEL_IP_OPT_GENEVE_MAX + 1]; 2414ece4778SXin Long int data_len, err; 2424ece4778SXin Long 2434ece4778SXin Long err = nla_parse_nested_deprecated(tb, LWTUNNEL_IP_OPT_GENEVE_MAX, 2444ece4778SXin Long attr, geneve_opt_policy, extack); 2454ece4778SXin Long if (err) 2464ece4778SXin Long return err; 2474ece4778SXin Long 2484ece4778SXin Long if (!tb[LWTUNNEL_IP_OPT_GENEVE_CLASS] || 2494ece4778SXin Long !tb[LWTUNNEL_IP_OPT_GENEVE_TYPE] || 2504ece4778SXin Long !tb[LWTUNNEL_IP_OPT_GENEVE_DATA]) 2514ece4778SXin Long return -EINVAL; 2524ece4778SXin Long 2534ece4778SXin Long attr = tb[LWTUNNEL_IP_OPT_GENEVE_DATA]; 2544ece4778SXin Long data_len = nla_len(attr); 2554ece4778SXin Long if (data_len % 4) 2564ece4778SXin Long return -EINVAL; 2574ece4778SXin Long 2584ece4778SXin Long if (info) { 2594ece4778SXin Long struct geneve_opt *opt = ip_tunnel_info_opts(info); 2604ece4778SXin Long 2614ece4778SXin Long memcpy(opt->opt_data, nla_data(attr), data_len); 2624ece4778SXin Long opt->length = data_len / 4; 2634ece4778SXin Long attr = tb[LWTUNNEL_IP_OPT_GENEVE_CLASS]; 2644ece4778SXin Long opt->opt_class = nla_get_be16(attr); 2654ece4778SXin Long attr = tb[LWTUNNEL_IP_OPT_GENEVE_TYPE]; 2664ece4778SXin Long opt->type = nla_get_u8(attr); 2674ece4778SXin Long info->key.tun_flags |= TUNNEL_GENEVE_OPT; 2684ece4778SXin Long } 2694ece4778SXin Long 2704ece4778SXin Long return sizeof(struct geneve_opt) + data_len; 2714ece4778SXin Long } 2724ece4778SXin Long 2734ece4778SXin Long static int ip_tun_parse_opts(struct nlattr *attr, struct ip_tunnel_info *info, 2744ece4778SXin Long struct netlink_ext_ack *extack) 2754ece4778SXin Long { 2764ece4778SXin Long struct nlattr *tb[LWTUNNEL_IP_OPTS_MAX + 1]; 2774ece4778SXin Long int err; 2784ece4778SXin Long 2794ece4778SXin Long if (!attr) 2804ece4778SXin Long return 0; 2814ece4778SXin Long 2824ece4778SXin Long err = nla_parse_nested_deprecated(tb, LWTUNNEL_IP_OPTS_MAX, attr, 2834ece4778SXin Long ip_opts_policy, extack); 2844ece4778SXin Long if (err) 2854ece4778SXin Long return err; 2864ece4778SXin Long 2874ece4778SXin Long if (tb[LWTUNNEL_IP_OPTS_GENEVE]) 2884ece4778SXin Long err = ip_tun_parse_opts_geneve(tb[LWTUNNEL_IP_OPTS_GENEVE], 2894ece4778SXin Long info, extack); 2904ece4778SXin Long else 2914ece4778SXin Long err = -EINVAL; 2924ece4778SXin Long 2934ece4778SXin Long return err; 2944ece4778SXin Long } 2954ece4778SXin Long 2964ece4778SXin Long static int ip_tun_get_optlen(struct nlattr *attr, 2974ece4778SXin Long struct netlink_ext_ack *extack) 2984ece4778SXin Long { 2994ece4778SXin Long return ip_tun_parse_opts(attr, NULL, extack); 3004ece4778SXin Long } 3014ece4778SXin Long 3024ece4778SXin Long static int ip_tun_set_opts(struct nlattr *attr, struct ip_tunnel_info *info, 3034ece4778SXin Long struct netlink_ext_ack *extack) 3044ece4778SXin Long { 3054ece4778SXin Long return ip_tun_parse_opts(attr, info, extack); 3064ece4778SXin Long } 3074ece4778SXin Long 30830357d7dSDavid Ahern static int ip_tun_build_state(struct nlattr *attr, 309127eb7cdSTom Herbert unsigned int family, const void *cfg, 3109ae28727SDavid Ahern struct lwtunnel_state **ts, 3119ae28727SDavid Ahern struct netlink_ext_ack *extack) 3123093fbe7SThomas Graf { 313a1c234f9SJiri Benc struct nlattr *tb[LWTUNNEL_IP_MAX + 1]; 3144ece4778SXin Long struct lwtunnel_state *new_state; 3154ece4778SXin Long struct ip_tunnel_info *tun_info; 3164ece4778SXin Long int err, opt_len; 3173093fbe7SThomas Graf 3188cb08174SJohannes Berg err = nla_parse_nested_deprecated(tb, LWTUNNEL_IP_MAX, attr, 3198cb08174SJohannes Berg ip_tun_policy, extack); 3203093fbe7SThomas Graf if (err < 0) 3213093fbe7SThomas Graf return err; 3223093fbe7SThomas Graf 3234ece4778SXin Long opt_len = ip_tun_get_optlen(tb[LWTUNNEL_IP_OPTS], extack); 3244ece4778SXin Long if (opt_len < 0) 3254ece4778SXin Long return opt_len; 3264ece4778SXin Long 3274ece4778SXin Long new_state = lwtunnel_state_alloc(sizeof(*tun_info) + opt_len); 3283093fbe7SThomas Graf if (!new_state) 3293093fbe7SThomas Graf return -ENOMEM; 3303093fbe7SThomas Graf 3313093fbe7SThomas Graf new_state->type = LWTUNNEL_ENCAP_IP; 3323093fbe7SThomas Graf 3333093fbe7SThomas Graf tun_info = lwt_tun_info(new_state); 3343093fbe7SThomas Graf 3354ece4778SXin Long err = ip_tun_set_opts(tb[LWTUNNEL_IP_OPTS], tun_info, extack); 3364ece4778SXin Long if (err < 0) { 3374ece4778SXin Long lwtstate_free(new_state); 3384ece4778SXin Long return err; 3394ece4778SXin Long } 3404ece4778SXin Long 3413d25eabbSwenxu #ifdef CONFIG_DST_CACHE 3423d25eabbSwenxu err = dst_cache_init(&tun_info->dst_cache, GFP_KERNEL); 3433d25eabbSwenxu if (err) { 3443d25eabbSwenxu lwtstate_free(new_state); 3453d25eabbSwenxu return err; 3463d25eabbSwenxu } 3473d25eabbSwenxu #endif 3483d25eabbSwenxu 349a1c234f9SJiri Benc if (tb[LWTUNNEL_IP_ID]) 35030d3d83aSLance Richardson tun_info->key.tun_id = nla_get_be64(tb[LWTUNNEL_IP_ID]); 3513093fbe7SThomas Graf 352a1c234f9SJiri Benc if (tb[LWTUNNEL_IP_DST]) 3537822ce73SHaishuang Yan tun_info->key.u.ipv4.dst = nla_get_in_addr(tb[LWTUNNEL_IP_DST]); 3543093fbe7SThomas Graf 355a1c234f9SJiri Benc if (tb[LWTUNNEL_IP_SRC]) 3567822ce73SHaishuang Yan tun_info->key.u.ipv4.src = nla_get_in_addr(tb[LWTUNNEL_IP_SRC]); 3573093fbe7SThomas Graf 358a1c234f9SJiri Benc if (tb[LWTUNNEL_IP_TTL]) 3597c383fb2SJiri Benc tun_info->key.ttl = nla_get_u8(tb[LWTUNNEL_IP_TTL]); 3603093fbe7SThomas Graf 361a1c234f9SJiri Benc if (tb[LWTUNNEL_IP_TOS]) 3627c383fb2SJiri Benc tun_info->key.tos = nla_get_u8(tb[LWTUNNEL_IP_TOS]); 3633093fbe7SThomas Graf 364a1c234f9SJiri Benc if (tb[LWTUNNEL_IP_FLAGS]) 3654ece4778SXin Long tun_info->key.tun_flags |= nla_get_be16(tb[LWTUNNEL_IP_FLAGS]); 3663093fbe7SThomas Graf 3673093fbe7SThomas Graf tun_info->mode = IP_TUNNEL_INFO_TX; 3684ece4778SXin Long tun_info->options_len = opt_len; 3693093fbe7SThomas Graf 3703093fbe7SThomas Graf *ts = new_state; 3713093fbe7SThomas Graf 3723093fbe7SThomas Graf return 0; 3733093fbe7SThomas Graf } 3743093fbe7SThomas Graf 3753d25eabbSwenxu static void ip_tun_destroy_state(struct lwtunnel_state *lwtstate) 3763d25eabbSwenxu { 3773d25eabbSwenxu #ifdef CONFIG_DST_CACHE 3783d25eabbSwenxu struct ip_tunnel_info *tun_info = lwt_tun_info(lwtstate); 3793d25eabbSwenxu 3803d25eabbSwenxu dst_cache_destroy(&tun_info->dst_cache); 3813d25eabbSwenxu #endif 3823d25eabbSwenxu } 3833d25eabbSwenxu 3844ece4778SXin Long static int ip_tun_fill_encap_opts_geneve(struct sk_buff *skb, 3854ece4778SXin Long struct ip_tunnel_info *tun_info) 3864ece4778SXin Long { 3874ece4778SXin Long struct geneve_opt *opt; 3884ece4778SXin Long struct nlattr *nest; 3894ece4778SXin Long 3904ece4778SXin Long nest = nla_nest_start_noflag(skb, LWTUNNEL_IP_OPTS_GENEVE); 3914ece4778SXin Long if (!nest) 3924ece4778SXin Long return -ENOMEM; 3934ece4778SXin Long 3944ece4778SXin Long opt = ip_tunnel_info_opts(tun_info); 3954ece4778SXin Long if (nla_put_be16(skb, LWTUNNEL_IP_OPT_GENEVE_CLASS, opt->opt_class) || 3964ece4778SXin Long nla_put_u8(skb, LWTUNNEL_IP_OPT_GENEVE_TYPE, opt->type) || 3974ece4778SXin Long nla_put(skb, LWTUNNEL_IP_OPT_GENEVE_DATA, opt->length * 4, 3984ece4778SXin Long opt->opt_data)) { 3994ece4778SXin Long nla_nest_cancel(skb, nest); 4004ece4778SXin Long return -ENOMEM; 4014ece4778SXin Long } 4024ece4778SXin Long 4034ece4778SXin Long nla_nest_end(skb, nest); 4044ece4778SXin Long return 0; 4054ece4778SXin Long } 4064ece4778SXin Long 4074ece4778SXin Long static int ip_tun_fill_encap_opts(struct sk_buff *skb, int type, 4084ece4778SXin Long struct ip_tunnel_info *tun_info) 4094ece4778SXin Long { 4104ece4778SXin Long struct nlattr *nest; 4114ece4778SXin Long int err = 0; 4124ece4778SXin Long 4134ece4778SXin Long if (!(tun_info->key.tun_flags & TUNNEL_GENEVE_OPT)) 4144ece4778SXin Long return 0; 4154ece4778SXin Long 4164ece4778SXin Long nest = nla_nest_start_noflag(skb, type); 4174ece4778SXin Long if (!nest) 4184ece4778SXin Long return -ENOMEM; 4194ece4778SXin Long 4204ece4778SXin Long if (tun_info->key.tun_flags & TUNNEL_GENEVE_OPT) 4214ece4778SXin Long err = ip_tun_fill_encap_opts_geneve(skb, tun_info); 4224ece4778SXin Long 4234ece4778SXin Long if (err) { 4244ece4778SXin Long nla_nest_cancel(skb, nest); 4254ece4778SXin Long return err; 4264ece4778SXin Long } 4274ece4778SXin Long 4284ece4778SXin Long nla_nest_end(skb, nest); 4294ece4778SXin Long return 0; 4304ece4778SXin Long } 4314ece4778SXin Long 4323093fbe7SThomas Graf static int ip_tun_fill_encap_info(struct sk_buff *skb, 4333093fbe7SThomas Graf struct lwtunnel_state *lwtstate) 4343093fbe7SThomas Graf { 4353093fbe7SThomas Graf struct ip_tunnel_info *tun_info = lwt_tun_info(lwtstate); 4363093fbe7SThomas Graf 437b46f6dedSNicolas Dichtel if (nla_put_be64(skb, LWTUNNEL_IP_ID, tun_info->key.tun_id, 438b46f6dedSNicolas Dichtel LWTUNNEL_IP_PAD) || 4397822ce73SHaishuang Yan nla_put_in_addr(skb, LWTUNNEL_IP_DST, tun_info->key.u.ipv4.dst) || 4407822ce73SHaishuang Yan nla_put_in_addr(skb, LWTUNNEL_IP_SRC, tun_info->key.u.ipv4.src) || 4417c383fb2SJiri Benc nla_put_u8(skb, LWTUNNEL_IP_TOS, tun_info->key.tos) || 4427c383fb2SJiri Benc nla_put_u8(skb, LWTUNNEL_IP_TTL, tun_info->key.ttl) || 4434ece4778SXin Long nla_put_be16(skb, LWTUNNEL_IP_FLAGS, tun_info->key.tun_flags) || 4444ece4778SXin Long ip_tun_fill_encap_opts(skb, LWTUNNEL_IP_OPTS, tun_info)) 4453093fbe7SThomas Graf return -ENOMEM; 4463093fbe7SThomas Graf 4473093fbe7SThomas Graf return 0; 4483093fbe7SThomas Graf } 4493093fbe7SThomas Graf 4504ece4778SXin Long static int ip_tun_opts_nlsize(struct ip_tunnel_info *info) 4514ece4778SXin Long { 4524ece4778SXin Long int opt_len; 4534ece4778SXin Long 4544ece4778SXin Long if (!(info->key.tun_flags & TUNNEL_GENEVE_OPT)) 4554ece4778SXin Long return 0; 4564ece4778SXin Long 4574ece4778SXin Long opt_len = nla_total_size(0); /* LWTUNNEL_IP_OPTS */ 4584ece4778SXin Long if (info->key.tun_flags & TUNNEL_GENEVE_OPT) { 4594ece4778SXin Long struct geneve_opt *opt = ip_tunnel_info_opts(info); 4604ece4778SXin Long 4614ece4778SXin Long opt_len += nla_total_size(0) /* LWTUNNEL_IP_OPTS_GENEVE */ 4624ece4778SXin Long + nla_total_size(2) /* OPT_GENEVE_CLASS */ 4634ece4778SXin Long + nla_total_size(1) /* OPT_GENEVE_TYPE */ 4644ece4778SXin Long + nla_total_size(opt->length * 4); 4654ece4778SXin Long /* OPT_GENEVE_DATA */ 4664ece4778SXin Long } 4674ece4778SXin Long 4684ece4778SXin Long return opt_len; 4694ece4778SXin Long } 4704ece4778SXin Long 4713093fbe7SThomas Graf static int ip_tun_encap_nlsize(struct lwtunnel_state *lwtstate) 4723093fbe7SThomas Graf { 473b46f6dedSNicolas Dichtel return nla_total_size_64bit(8) /* LWTUNNEL_IP_ID */ 474a1c234f9SJiri Benc + nla_total_size(4) /* LWTUNNEL_IP_DST */ 475a1c234f9SJiri Benc + nla_total_size(4) /* LWTUNNEL_IP_SRC */ 476a1c234f9SJiri Benc + nla_total_size(1) /* LWTUNNEL_IP_TOS */ 477a1c234f9SJiri Benc + nla_total_size(1) /* LWTUNNEL_IP_TTL */ 4784ece4778SXin Long + nla_total_size(2) /* LWTUNNEL_IP_FLAGS */ 4794ece4778SXin Long + ip_tun_opts_nlsize(lwt_tun_info(lwtstate)); 4804ece4778SXin Long /* LWTUNNEL_IP_OPTS */ 4813093fbe7SThomas Graf } 4823093fbe7SThomas Graf 4832d798499SJiri Benc static int ip_tun_cmp_encap(struct lwtunnel_state *a, struct lwtunnel_state *b) 4842d798499SJiri Benc { 4850eb8eb2fSXin Long struct ip_tunnel_info *info_a = lwt_tun_info(a); 4860eb8eb2fSXin Long struct ip_tunnel_info *info_b = lwt_tun_info(b); 4870eb8eb2fSXin Long 4880eb8eb2fSXin Long return memcmp(info_a, info_b, sizeof(info_a->key)) || 4890eb8eb2fSXin Long info_a->mode != info_b->mode || 4900eb8eb2fSXin Long info_a->options_len != info_b->options_len || 4910eb8eb2fSXin Long memcmp(ip_tunnel_info_opts(info_a), 4920eb8eb2fSXin Long ip_tunnel_info_opts(info_b), info_a->options_len); 4932d798499SJiri Benc } 4942d798499SJiri Benc 4953093fbe7SThomas Graf static const struct lwtunnel_encap_ops ip_tun_lwt_ops = { 4963093fbe7SThomas Graf .build_state = ip_tun_build_state, 4973d25eabbSwenxu .destroy_state = ip_tun_destroy_state, 4983093fbe7SThomas Graf .fill_encap = ip_tun_fill_encap_info, 4993093fbe7SThomas Graf .get_encap_size = ip_tun_encap_nlsize, 5002d798499SJiri Benc .cmp_encap = ip_tun_cmp_encap, 50188ff7334SRobert Shearman .owner = THIS_MODULE, 5023093fbe7SThomas Graf }; 5033093fbe7SThomas Graf 50432a2b002SJiri Benc static const struct nla_policy ip6_tun_policy[LWTUNNEL_IP6_MAX + 1] = { 50532a2b002SJiri Benc [LWTUNNEL_IP6_ID] = { .type = NLA_U64 }, 50632a2b002SJiri Benc [LWTUNNEL_IP6_DST] = { .len = sizeof(struct in6_addr) }, 50732a2b002SJiri Benc [LWTUNNEL_IP6_SRC] = { .len = sizeof(struct in6_addr) }, 50832a2b002SJiri Benc [LWTUNNEL_IP6_HOPLIMIT] = { .type = NLA_U8 }, 50932a2b002SJiri Benc [LWTUNNEL_IP6_TC] = { .type = NLA_U8 }, 51032a2b002SJiri Benc [LWTUNNEL_IP6_FLAGS] = { .type = NLA_U16 }, 51132a2b002SJiri Benc }; 51232a2b002SJiri Benc 51330357d7dSDavid Ahern static int ip6_tun_build_state(struct nlattr *attr, 514127eb7cdSTom Herbert unsigned int family, const void *cfg, 5159ae28727SDavid Ahern struct lwtunnel_state **ts, 5169ae28727SDavid Ahern struct netlink_ext_ack *extack) 51732a2b002SJiri Benc { 51832a2b002SJiri Benc struct nlattr *tb[LWTUNNEL_IP6_MAX + 1]; 5194ece4778SXin Long struct lwtunnel_state *new_state; 5204ece4778SXin Long struct ip_tunnel_info *tun_info; 5214ece4778SXin Long int err, opt_len; 52232a2b002SJiri Benc 5238cb08174SJohannes Berg err = nla_parse_nested_deprecated(tb, LWTUNNEL_IP6_MAX, attr, 5248cb08174SJohannes Berg ip6_tun_policy, extack); 52532a2b002SJiri Benc if (err < 0) 52632a2b002SJiri Benc return err; 52732a2b002SJiri Benc 5284ece4778SXin Long opt_len = ip_tun_get_optlen(tb[LWTUNNEL_IP6_OPTS], extack); 5294ece4778SXin Long if (opt_len < 0) 5304ece4778SXin Long return opt_len; 5314ece4778SXin Long 5324ece4778SXin Long new_state = lwtunnel_state_alloc(sizeof(*tun_info) + opt_len); 53332a2b002SJiri Benc if (!new_state) 53432a2b002SJiri Benc return -ENOMEM; 53532a2b002SJiri Benc 53632a2b002SJiri Benc new_state->type = LWTUNNEL_ENCAP_IP6; 53732a2b002SJiri Benc 53832a2b002SJiri Benc tun_info = lwt_tun_info(new_state); 53932a2b002SJiri Benc 5404ece4778SXin Long err = ip_tun_set_opts(tb[LWTUNNEL_IP6_OPTS], tun_info, extack); 5414ece4778SXin Long if (err < 0) { 5424ece4778SXin Long lwtstate_free(new_state); 5434ece4778SXin Long return err; 5444ece4778SXin Long } 5454ece4778SXin Long 54632a2b002SJiri Benc if (tb[LWTUNNEL_IP6_ID]) 54730d3d83aSLance Richardson tun_info->key.tun_id = nla_get_be64(tb[LWTUNNEL_IP6_ID]); 54832a2b002SJiri Benc 54932a2b002SJiri Benc if (tb[LWTUNNEL_IP6_DST]) 55032a2b002SJiri Benc tun_info->key.u.ipv6.dst = nla_get_in6_addr(tb[LWTUNNEL_IP6_DST]); 55132a2b002SJiri Benc 55232a2b002SJiri Benc if (tb[LWTUNNEL_IP6_SRC]) 55332a2b002SJiri Benc tun_info->key.u.ipv6.src = nla_get_in6_addr(tb[LWTUNNEL_IP6_SRC]); 55432a2b002SJiri Benc 55532a2b002SJiri Benc if (tb[LWTUNNEL_IP6_HOPLIMIT]) 55632a2b002SJiri Benc tun_info->key.ttl = nla_get_u8(tb[LWTUNNEL_IP6_HOPLIMIT]); 55732a2b002SJiri Benc 55832a2b002SJiri Benc if (tb[LWTUNNEL_IP6_TC]) 55932a2b002SJiri Benc tun_info->key.tos = nla_get_u8(tb[LWTUNNEL_IP6_TC]); 56032a2b002SJiri Benc 56132a2b002SJiri Benc if (tb[LWTUNNEL_IP6_FLAGS]) 5624ece4778SXin Long tun_info->key.tun_flags |= nla_get_be16(tb[LWTUNNEL_IP6_FLAGS]); 56332a2b002SJiri Benc 5647f9562a1SJiri Benc tun_info->mode = IP_TUNNEL_INFO_TX | IP_TUNNEL_INFO_IPV6; 5654ece4778SXin Long tun_info->options_len = opt_len; 56632a2b002SJiri Benc 56732a2b002SJiri Benc *ts = new_state; 56832a2b002SJiri Benc 56932a2b002SJiri Benc return 0; 57032a2b002SJiri Benc } 57132a2b002SJiri Benc 57232a2b002SJiri Benc static int ip6_tun_fill_encap_info(struct sk_buff *skb, 57332a2b002SJiri Benc struct lwtunnel_state *lwtstate) 57432a2b002SJiri Benc { 57532a2b002SJiri Benc struct ip_tunnel_info *tun_info = lwt_tun_info(lwtstate); 57632a2b002SJiri Benc 577b46f6dedSNicolas Dichtel if (nla_put_be64(skb, LWTUNNEL_IP6_ID, tun_info->key.tun_id, 578b46f6dedSNicolas Dichtel LWTUNNEL_IP6_PAD) || 57932a2b002SJiri Benc nla_put_in6_addr(skb, LWTUNNEL_IP6_DST, &tun_info->key.u.ipv6.dst) || 58032a2b002SJiri Benc nla_put_in6_addr(skb, LWTUNNEL_IP6_SRC, &tun_info->key.u.ipv6.src) || 581995096a0SQuentin Armitage nla_put_u8(skb, LWTUNNEL_IP6_TC, tun_info->key.tos) || 582995096a0SQuentin Armitage nla_put_u8(skb, LWTUNNEL_IP6_HOPLIMIT, tun_info->key.ttl) || 5834ece4778SXin Long nla_put_be16(skb, LWTUNNEL_IP6_FLAGS, tun_info->key.tun_flags) || 5844ece4778SXin Long ip_tun_fill_encap_opts(skb, LWTUNNEL_IP6_OPTS, tun_info)) 58532a2b002SJiri Benc return -ENOMEM; 58632a2b002SJiri Benc 58732a2b002SJiri Benc return 0; 58832a2b002SJiri Benc } 58932a2b002SJiri Benc 59032a2b002SJiri Benc static int ip6_tun_encap_nlsize(struct lwtunnel_state *lwtstate) 59132a2b002SJiri Benc { 592b46f6dedSNicolas Dichtel return nla_total_size_64bit(8) /* LWTUNNEL_IP6_ID */ 59332a2b002SJiri Benc + nla_total_size(16) /* LWTUNNEL_IP6_DST */ 59432a2b002SJiri Benc + nla_total_size(16) /* LWTUNNEL_IP6_SRC */ 59532a2b002SJiri Benc + nla_total_size(1) /* LWTUNNEL_IP6_HOPLIMIT */ 59632a2b002SJiri Benc + nla_total_size(1) /* LWTUNNEL_IP6_TC */ 5974ece4778SXin Long + nla_total_size(2) /* LWTUNNEL_IP6_FLAGS */ 5984ece4778SXin Long + ip_tun_opts_nlsize(lwt_tun_info(lwtstate)); 5994ece4778SXin Long /* LWTUNNEL_IP6_OPTS */ 60032a2b002SJiri Benc } 60132a2b002SJiri Benc 60232a2b002SJiri Benc static const struct lwtunnel_encap_ops ip6_tun_lwt_ops = { 60332a2b002SJiri Benc .build_state = ip6_tun_build_state, 60432a2b002SJiri Benc .fill_encap = ip6_tun_fill_encap_info, 60532a2b002SJiri Benc .get_encap_size = ip6_tun_encap_nlsize, 60632a2b002SJiri Benc .cmp_encap = ip_tun_cmp_encap, 60788ff7334SRobert Shearman .owner = THIS_MODULE, 60832a2b002SJiri Benc }; 60932a2b002SJiri Benc 610045a0fa0SThomas Graf void __init ip_tunnel_core_init(void) 6113093fbe7SThomas Graf { 612fca5fdf6SDaniel Borkmann /* If you land here, make sure whether increasing ip_tunnel_info's 613fca5fdf6SDaniel Borkmann * options_len is a reasonable choice with its usage in front ends 614fca5fdf6SDaniel Borkmann * (f.e., it's part of flow keys, etc). 615fca5fdf6SDaniel Borkmann */ 616fca5fdf6SDaniel Borkmann BUILD_BUG_ON(IP_TUNNEL_OPTS_MAX != 255); 617fca5fdf6SDaniel Borkmann 6183093fbe7SThomas Graf lwtunnel_encap_add_ops(&ip_tun_lwt_ops, LWTUNNEL_ENCAP_IP); 61932a2b002SJiri Benc lwtunnel_encap_add_ops(&ip6_tun_lwt_ops, LWTUNNEL_ENCAP_IP6); 6203093fbe7SThomas Graf } 621e7030878SThomas Graf 6225263a98fSDavidlohr Bueso DEFINE_STATIC_KEY_FALSE(ip_tunnel_metadata_cnt); 623e7030878SThomas Graf EXPORT_SYMBOL(ip_tunnel_metadata_cnt); 624e7030878SThomas Graf 625e7030878SThomas Graf void ip_tunnel_need_metadata(void) 626e7030878SThomas Graf { 6275263a98fSDavidlohr Bueso static_branch_inc(&ip_tunnel_metadata_cnt); 628e7030878SThomas Graf } 629e7030878SThomas Graf EXPORT_SYMBOL_GPL(ip_tunnel_need_metadata); 630e7030878SThomas Graf 631e7030878SThomas Graf void ip_tunnel_unneed_metadata(void) 632e7030878SThomas Graf { 6335263a98fSDavidlohr Bueso static_branch_dec(&ip_tunnel_metadata_cnt); 634e7030878SThomas Graf } 635e7030878SThomas Graf EXPORT_SYMBOL_GPL(ip_tunnel_unneed_metadata); 636