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> 370e6fbc5bSPravin B Shelar 3855c2bc14STom Herbert const struct ip_tunnel_encap_ops __rcu * 3955c2bc14STom Herbert iptun_encaps[MAX_IPTUN_ENCAP_OPS] __read_mostly; 4055c2bc14STom Herbert EXPORT_SYMBOL(iptun_encaps); 4155c2bc14STom Herbert 42058214a4STom Herbert const struct ip6_tnl_encap_ops __rcu * 43058214a4STom Herbert ip6tun_encaps[MAX_IPTUN_ENCAP_OPS] __read_mostly; 44058214a4STom Herbert EXPORT_SYMBOL(ip6tun_encaps); 45058214a4STom Herbert 46039f5062SPravin B Shelar void iptunnel_xmit(struct sock *sk, struct rtable *rt, struct sk_buff *skb, 470e6fbc5bSPravin B Shelar __be32 src, __be32 dst, __u8 proto, 48963a88b3SNicolas Dichtel __u8 tos, __u8 ttl, __be16 df, bool xnet) 490e6fbc5bSPravin B Shelar { 50bc22a0e2SNicolas Dichtel int pkt_len = skb->len - skb_inner_network_offset(skb); 51f859b0f6SEric W. Biederman struct net *net = dev_net(rt->dst.dev); 52039f5062SPravin B Shelar struct net_device *dev = skb->dev; 530e6fbc5bSPravin B Shelar struct iphdr *iph; 540e6fbc5bSPravin B Shelar int err; 550e6fbc5bSPravin B Shelar 56963a88b3SNicolas Dichtel skb_scrub_packet(skb, xnet); 57963a88b3SNicolas Dichtel 58bf8d85d4SEric Dumazet skb_clear_hash_if_not_l4(skb); 590e6fbc5bSPravin B Shelar skb_dst_set(skb, &rt->dst); 600e6fbc5bSPravin B Shelar memset(IPCB(skb), 0, sizeof(*IPCB(skb))); 610e6fbc5bSPravin B Shelar 620e6fbc5bSPravin B Shelar /* Push down and install the IP header. */ 6378a3694dSSteffen Klassert skb_push(skb, sizeof(struct iphdr)); 640e6fbc5bSPravin B Shelar skb_reset_network_header(skb); 650e6fbc5bSPravin B Shelar 660e6fbc5bSPravin B Shelar iph = ip_hdr(skb); 670e6fbc5bSPravin B Shelar 680e6fbc5bSPravin B Shelar iph->version = 4; 690e6fbc5bSPravin B Shelar iph->ihl = sizeof(struct iphdr) >> 2; 7016f7eb2bSSabrina Dubroca iph->frag_off = ip_mtu_locked(&rt->dst) ? 0 : df; 710e6fbc5bSPravin B Shelar iph->protocol = proto; 720e6fbc5bSPravin B Shelar iph->tos = tos; 730e6fbc5bSPravin B Shelar iph->daddr = dst; 740e6fbc5bSPravin B Shelar iph->saddr = src; 750e6fbc5bSPravin B Shelar iph->ttl = ttl; 76f859b0f6SEric W. Biederman __ip_select_ident(net, iph, skb_shinfo(skb)->gso_segs ?: 1); 770e6fbc5bSPravin B Shelar 7833224b16SEric W. Biederman err = ip_local_out(net, sk, skb); 795684abf7SXin Long 805684abf7SXin Long if (dev) { 810e6fbc5bSPravin B Shelar if (unlikely(net_xmit_eval(err))) 820e6fbc5bSPravin B Shelar pkt_len = 0; 83039f5062SPravin B Shelar iptunnel_xmit_stats(dev, pkt_len); 840e6fbc5bSPravin B Shelar } 855684abf7SXin Long } 860e6fbc5bSPravin B Shelar EXPORT_SYMBOL_GPL(iptunnel_xmit); 873d7b46cdSPravin B Shelar 88a6d5bbf3SJiri Benc int __iptunnel_pull_header(struct sk_buff *skb, int hdr_len, 89a6d5bbf3SJiri Benc __be16 inner_proto, bool raw_proto, bool xnet) 903d7b46cdSPravin B Shelar { 913d7b46cdSPravin B Shelar if (unlikely(!pskb_may_pull(skb, hdr_len))) 923d7b46cdSPravin B Shelar return -ENOMEM; 933d7b46cdSPravin B Shelar 943d7b46cdSPravin B Shelar skb_pull_rcsum(skb, hdr_len); 953d7b46cdSPravin B Shelar 96a6d5bbf3SJiri Benc if (!raw_proto && inner_proto == htons(ETH_P_TEB)) { 971245dfc8SLi RongQing struct ethhdr *eh; 983d7b46cdSPravin B Shelar 993d7b46cdSPravin B Shelar if (unlikely(!pskb_may_pull(skb, ETH_HLEN))) 1003d7b46cdSPravin B Shelar return -ENOMEM; 1013d7b46cdSPravin B Shelar 1021245dfc8SLi RongQing eh = (struct ethhdr *)skb->data; 103d181ddcaSAlexander Duyck if (likely(eth_proto_is_802_3(eh->h_proto))) 1043d7b46cdSPravin B Shelar skb->protocol = eh->h_proto; 1053d7b46cdSPravin B Shelar else 1063d7b46cdSPravin B Shelar skb->protocol = htons(ETH_P_802_2); 1073d7b46cdSPravin B Shelar 1083d7b46cdSPravin B Shelar } else { 1093d7b46cdSPravin B Shelar skb->protocol = inner_proto; 1103d7b46cdSPravin B Shelar } 1113d7b46cdSPravin B Shelar 1127539fadcSTom Herbert skb_clear_hash_if_not_l4(skb); 1133e2ed0c2SMichał Mirosław __vlan_hwaccel_clear_tag(skb); 1143d7b46cdSPravin B Shelar skb_set_queue_mapping(skb, 0); 1157f290c94SJiri Benc skb_scrub_packet(skb, xnet); 116a09a4c8dSJesse Gross 117a09a4c8dSJesse Gross return iptunnel_pull_offloads(skb); 1183d7b46cdSPravin B Shelar } 119a6d5bbf3SJiri Benc EXPORT_SYMBOL_GPL(__iptunnel_pull_header); 1202d26f0a3SEric Dumazet 12163d008a4SJiri Benc struct metadata_dst *iptunnel_metadata_reply(struct metadata_dst *md, 12263d008a4SJiri Benc gfp_t flags) 12363d008a4SJiri Benc { 12463d008a4SJiri Benc struct metadata_dst *res; 12563d008a4SJiri Benc struct ip_tunnel_info *dst, *src; 12663d008a4SJiri Benc 1273fcece12SJakub Kicinski if (!md || md->type != METADATA_IP_TUNNEL || 1283fcece12SJakub Kicinski md->u.tun_info.mode & IP_TUNNEL_INFO_TX) 1293fcece12SJakub Kicinski 13063d008a4SJiri Benc return NULL; 13163d008a4SJiri Benc 1323fcece12SJakub Kicinski res = metadata_dst_alloc(0, METADATA_IP_TUNNEL, flags); 13363d008a4SJiri Benc if (!res) 13463d008a4SJiri Benc return NULL; 13563d008a4SJiri Benc 13663d008a4SJiri Benc dst = &res->u.tun_info; 13763d008a4SJiri Benc src = &md->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; 14663d008a4SJiri Benc 14763d008a4SJiri Benc return res; 14863d008a4SJiri Benc } 14963d008a4SJiri Benc EXPORT_SYMBOL_GPL(iptunnel_metadata_reply); 15063d008a4SJiri Benc 151aed069dfSAlexander Duyck int iptunnel_handle_offloads(struct sk_buff *skb, 1522d26f0a3SEric Dumazet int gso_type_mask) 1532d26f0a3SEric Dumazet { 1542d26f0a3SEric Dumazet int err; 1552d26f0a3SEric Dumazet 1562d26f0a3SEric Dumazet if (likely(!skb->encapsulation)) { 1572d26f0a3SEric Dumazet skb_reset_inner_headers(skb); 1582d26f0a3SEric Dumazet skb->encapsulation = 1; 1592d26f0a3SEric Dumazet } 1602d26f0a3SEric Dumazet 1612d26f0a3SEric Dumazet if (skb_is_gso(skb)) { 1629580bf2eSEric Dumazet err = skb_header_unclone(skb, GFP_ATOMIC); 1632d26f0a3SEric Dumazet if (unlikely(err)) 164aed069dfSAlexander Duyck return err; 1652d26f0a3SEric Dumazet skb_shinfo(skb)->gso_type |= gso_type_mask; 166aed069dfSAlexander Duyck return 0; 1672d26f0a3SEric Dumazet } 1682d26f0a3SEric Dumazet 1696fa79666SEdward Cree if (skb->ip_summed != CHECKSUM_PARTIAL) { 1702d26f0a3SEric Dumazet skb->ip_summed = CHECKSUM_NONE; 1716fa79666SEdward Cree /* We clear encapsulation here to prevent badly-written 1726fa79666SEdward Cree * drivers potentially deciding to offload an inner checksum 1736fa79666SEdward Cree * if we set CHECKSUM_PARTIAL on the outer header. 1746fa79666SEdward Cree * This should go away when the drivers are all fixed. 1756fa79666SEdward Cree */ 176179bc67fSEdward Cree skb->encapsulation = 0; 177179bc67fSEdward Cree } 1782d26f0a3SEric Dumazet 179aed069dfSAlexander Duyck return 0; 1802d26f0a3SEric Dumazet } 1812d26f0a3SEric Dumazet EXPORT_SYMBOL_GPL(iptunnel_handle_offloads); 182ebe44f35SDavid S. Miller 183ebe44f35SDavid S. Miller /* Often modified stats are per cpu, other are shared (netdev->stats) */ 184bc1f4470Sstephen hemminger void ip_tunnel_get_stats64(struct net_device *dev, 185ebe44f35SDavid S. Miller struct rtnl_link_stats64 *tot) 186ebe44f35SDavid S. Miller { 187ebe44f35SDavid S. Miller int i; 188ebe44f35SDavid S. Miller 189c24a5964SAlexander Duyck netdev_stats_to_stats64(tot, &dev->stats); 190c24a5964SAlexander Duyck 191ebe44f35SDavid S. Miller for_each_possible_cpu(i) { 192ebe44f35SDavid S. Miller const struct pcpu_sw_netstats *tstats = 193ebe44f35SDavid S. Miller per_cpu_ptr(dev->tstats, i); 194ebe44f35SDavid S. Miller u64 rx_packets, rx_bytes, tx_packets, tx_bytes; 195ebe44f35SDavid S. Miller unsigned int start; 196ebe44f35SDavid S. Miller 197ebe44f35SDavid S. Miller do { 19857a7744eSEric W. Biederman start = u64_stats_fetch_begin_irq(&tstats->syncp); 199ebe44f35SDavid S. Miller rx_packets = tstats->rx_packets; 200ebe44f35SDavid S. Miller tx_packets = tstats->tx_packets; 201ebe44f35SDavid S. Miller rx_bytes = tstats->rx_bytes; 202ebe44f35SDavid S. Miller tx_bytes = tstats->tx_bytes; 20357a7744eSEric W. Biederman } while (u64_stats_fetch_retry_irq(&tstats->syncp, start)); 204ebe44f35SDavid S. Miller 205ebe44f35SDavid S. Miller tot->rx_packets += rx_packets; 206ebe44f35SDavid S. Miller tot->tx_packets += tx_packets; 207ebe44f35SDavid S. Miller tot->rx_bytes += rx_bytes; 208ebe44f35SDavid S. Miller tot->tx_bytes += tx_bytes; 209ebe44f35SDavid S. Miller } 210ebe44f35SDavid S. Miller } 211ebe44f35SDavid S. Miller EXPORT_SYMBOL_GPL(ip_tunnel_get_stats64); 2123093fbe7SThomas Graf 213a1c234f9SJiri Benc static const struct nla_policy ip_tun_policy[LWTUNNEL_IP_MAX + 1] = { 214a1c234f9SJiri Benc [LWTUNNEL_IP_ID] = { .type = NLA_U64 }, 215a1c234f9SJiri Benc [LWTUNNEL_IP_DST] = { .type = NLA_U32 }, 216a1c234f9SJiri Benc [LWTUNNEL_IP_SRC] = { .type = NLA_U32 }, 217a1c234f9SJiri Benc [LWTUNNEL_IP_TTL] = { .type = NLA_U8 }, 218a1c234f9SJiri Benc [LWTUNNEL_IP_TOS] = { .type = NLA_U8 }, 219a1c234f9SJiri Benc [LWTUNNEL_IP_FLAGS] = { .type = NLA_U16 }, 2203093fbe7SThomas Graf }; 2213093fbe7SThomas Graf 22230357d7dSDavid Ahern static int ip_tun_build_state(struct nlattr *attr, 223127eb7cdSTom Herbert unsigned int family, const void *cfg, 2249ae28727SDavid Ahern struct lwtunnel_state **ts, 2259ae28727SDavid Ahern struct netlink_ext_ack *extack) 2263093fbe7SThomas Graf { 2273093fbe7SThomas Graf struct ip_tunnel_info *tun_info; 2283093fbe7SThomas Graf struct lwtunnel_state *new_state; 229a1c234f9SJiri Benc struct nlattr *tb[LWTUNNEL_IP_MAX + 1]; 2303093fbe7SThomas Graf int err; 2313093fbe7SThomas Graf 2328cb08174SJohannes Berg err = nla_parse_nested_deprecated(tb, LWTUNNEL_IP_MAX, attr, 2338cb08174SJohannes Berg ip_tun_policy, extack); 2343093fbe7SThomas Graf if (err < 0) 2353093fbe7SThomas Graf return err; 2363093fbe7SThomas Graf 2373093fbe7SThomas Graf new_state = lwtunnel_state_alloc(sizeof(*tun_info)); 2383093fbe7SThomas Graf if (!new_state) 2393093fbe7SThomas Graf return -ENOMEM; 2403093fbe7SThomas Graf 2413093fbe7SThomas Graf new_state->type = LWTUNNEL_ENCAP_IP; 2423093fbe7SThomas Graf 2433093fbe7SThomas Graf tun_info = lwt_tun_info(new_state); 2443093fbe7SThomas Graf 2453d25eabbSwenxu #ifdef CONFIG_DST_CACHE 2463d25eabbSwenxu err = dst_cache_init(&tun_info->dst_cache, GFP_KERNEL); 2473d25eabbSwenxu if (err) { 2483d25eabbSwenxu lwtstate_free(new_state); 2493d25eabbSwenxu return err; 2503d25eabbSwenxu } 2513d25eabbSwenxu #endif 2523d25eabbSwenxu 253a1c234f9SJiri Benc if (tb[LWTUNNEL_IP_ID]) 25430d3d83aSLance Richardson tun_info->key.tun_id = nla_get_be64(tb[LWTUNNEL_IP_ID]); 2553093fbe7SThomas Graf 256a1c234f9SJiri Benc if (tb[LWTUNNEL_IP_DST]) 2577822ce73SHaishuang Yan tun_info->key.u.ipv4.dst = nla_get_in_addr(tb[LWTUNNEL_IP_DST]); 2583093fbe7SThomas Graf 259a1c234f9SJiri Benc if (tb[LWTUNNEL_IP_SRC]) 2607822ce73SHaishuang Yan tun_info->key.u.ipv4.src = nla_get_in_addr(tb[LWTUNNEL_IP_SRC]); 2613093fbe7SThomas Graf 262a1c234f9SJiri Benc if (tb[LWTUNNEL_IP_TTL]) 2637c383fb2SJiri Benc tun_info->key.ttl = nla_get_u8(tb[LWTUNNEL_IP_TTL]); 2643093fbe7SThomas Graf 265a1c234f9SJiri Benc if (tb[LWTUNNEL_IP_TOS]) 2667c383fb2SJiri Benc tun_info->key.tos = nla_get_u8(tb[LWTUNNEL_IP_TOS]); 2673093fbe7SThomas Graf 268a1c234f9SJiri Benc if (tb[LWTUNNEL_IP_FLAGS]) 26930d3d83aSLance Richardson tun_info->key.tun_flags = nla_get_be16(tb[LWTUNNEL_IP_FLAGS]); 2703093fbe7SThomas Graf 2713093fbe7SThomas Graf tun_info->mode = IP_TUNNEL_INFO_TX; 2723093fbe7SThomas Graf tun_info->options_len = 0; 2733093fbe7SThomas Graf 2743093fbe7SThomas Graf *ts = new_state; 2753093fbe7SThomas Graf 2763093fbe7SThomas Graf return 0; 2773093fbe7SThomas Graf } 2783093fbe7SThomas Graf 2793d25eabbSwenxu static void ip_tun_destroy_state(struct lwtunnel_state *lwtstate) 2803d25eabbSwenxu { 2813d25eabbSwenxu #ifdef CONFIG_DST_CACHE 2823d25eabbSwenxu struct ip_tunnel_info *tun_info = lwt_tun_info(lwtstate); 2833d25eabbSwenxu 2843d25eabbSwenxu dst_cache_destroy(&tun_info->dst_cache); 2853d25eabbSwenxu #endif 2863d25eabbSwenxu } 2873d25eabbSwenxu 2883093fbe7SThomas Graf static int ip_tun_fill_encap_info(struct sk_buff *skb, 2893093fbe7SThomas Graf struct lwtunnel_state *lwtstate) 2903093fbe7SThomas Graf { 2913093fbe7SThomas Graf struct ip_tunnel_info *tun_info = lwt_tun_info(lwtstate); 2923093fbe7SThomas Graf 293b46f6dedSNicolas Dichtel if (nla_put_be64(skb, LWTUNNEL_IP_ID, tun_info->key.tun_id, 294b46f6dedSNicolas Dichtel LWTUNNEL_IP_PAD) || 2957822ce73SHaishuang Yan nla_put_in_addr(skb, LWTUNNEL_IP_DST, tun_info->key.u.ipv4.dst) || 2967822ce73SHaishuang Yan nla_put_in_addr(skb, LWTUNNEL_IP_SRC, tun_info->key.u.ipv4.src) || 2977c383fb2SJiri Benc nla_put_u8(skb, LWTUNNEL_IP_TOS, tun_info->key.tos) || 2987c383fb2SJiri Benc nla_put_u8(skb, LWTUNNEL_IP_TTL, tun_info->key.ttl) || 29930d3d83aSLance Richardson nla_put_be16(skb, LWTUNNEL_IP_FLAGS, tun_info->key.tun_flags)) 3003093fbe7SThomas Graf return -ENOMEM; 3013093fbe7SThomas Graf 3023093fbe7SThomas Graf return 0; 3033093fbe7SThomas Graf } 3043093fbe7SThomas Graf 3053093fbe7SThomas Graf static int ip_tun_encap_nlsize(struct lwtunnel_state *lwtstate) 3063093fbe7SThomas Graf { 307b46f6dedSNicolas Dichtel return nla_total_size_64bit(8) /* LWTUNNEL_IP_ID */ 308a1c234f9SJiri Benc + nla_total_size(4) /* LWTUNNEL_IP_DST */ 309a1c234f9SJiri Benc + nla_total_size(4) /* LWTUNNEL_IP_SRC */ 310a1c234f9SJiri Benc + nla_total_size(1) /* LWTUNNEL_IP_TOS */ 311a1c234f9SJiri Benc + nla_total_size(1) /* LWTUNNEL_IP_TTL */ 312a1c234f9SJiri Benc + nla_total_size(2); /* LWTUNNEL_IP_FLAGS */ 3133093fbe7SThomas Graf } 3143093fbe7SThomas Graf 3152d798499SJiri Benc static int ip_tun_cmp_encap(struct lwtunnel_state *a, struct lwtunnel_state *b) 3162d798499SJiri Benc { 3172d798499SJiri Benc return memcmp(lwt_tun_info(a), lwt_tun_info(b), 3182d798499SJiri Benc sizeof(struct ip_tunnel_info)); 3192d798499SJiri Benc } 3202d798499SJiri Benc 3213093fbe7SThomas Graf static const struct lwtunnel_encap_ops ip_tun_lwt_ops = { 3223093fbe7SThomas Graf .build_state = ip_tun_build_state, 3233d25eabbSwenxu .destroy_state = ip_tun_destroy_state, 3243093fbe7SThomas Graf .fill_encap = ip_tun_fill_encap_info, 3253093fbe7SThomas Graf .get_encap_size = ip_tun_encap_nlsize, 3262d798499SJiri Benc .cmp_encap = ip_tun_cmp_encap, 32788ff7334SRobert Shearman .owner = THIS_MODULE, 3283093fbe7SThomas Graf }; 3293093fbe7SThomas Graf 33032a2b002SJiri Benc static const struct nla_policy ip6_tun_policy[LWTUNNEL_IP6_MAX + 1] = { 33132a2b002SJiri Benc [LWTUNNEL_IP6_ID] = { .type = NLA_U64 }, 33232a2b002SJiri Benc [LWTUNNEL_IP6_DST] = { .len = sizeof(struct in6_addr) }, 33332a2b002SJiri Benc [LWTUNNEL_IP6_SRC] = { .len = sizeof(struct in6_addr) }, 33432a2b002SJiri Benc [LWTUNNEL_IP6_HOPLIMIT] = { .type = NLA_U8 }, 33532a2b002SJiri Benc [LWTUNNEL_IP6_TC] = { .type = NLA_U8 }, 33632a2b002SJiri Benc [LWTUNNEL_IP6_FLAGS] = { .type = NLA_U16 }, 33732a2b002SJiri Benc }; 33832a2b002SJiri Benc 33930357d7dSDavid Ahern static int ip6_tun_build_state(struct nlattr *attr, 340127eb7cdSTom Herbert unsigned int family, const void *cfg, 3419ae28727SDavid Ahern struct lwtunnel_state **ts, 3429ae28727SDavid Ahern struct netlink_ext_ack *extack) 34332a2b002SJiri Benc { 34432a2b002SJiri Benc struct ip_tunnel_info *tun_info; 34532a2b002SJiri Benc struct lwtunnel_state *new_state; 34632a2b002SJiri Benc struct nlattr *tb[LWTUNNEL_IP6_MAX + 1]; 34732a2b002SJiri Benc int err; 34832a2b002SJiri Benc 3498cb08174SJohannes Berg err = nla_parse_nested_deprecated(tb, LWTUNNEL_IP6_MAX, attr, 3508cb08174SJohannes Berg ip6_tun_policy, extack); 35132a2b002SJiri Benc if (err < 0) 35232a2b002SJiri Benc return err; 35332a2b002SJiri Benc 35432a2b002SJiri Benc new_state = lwtunnel_state_alloc(sizeof(*tun_info)); 35532a2b002SJiri Benc if (!new_state) 35632a2b002SJiri Benc return -ENOMEM; 35732a2b002SJiri Benc 35832a2b002SJiri Benc new_state->type = LWTUNNEL_ENCAP_IP6; 35932a2b002SJiri Benc 36032a2b002SJiri Benc tun_info = lwt_tun_info(new_state); 36132a2b002SJiri Benc 36232a2b002SJiri Benc if (tb[LWTUNNEL_IP6_ID]) 36330d3d83aSLance Richardson tun_info->key.tun_id = nla_get_be64(tb[LWTUNNEL_IP6_ID]); 36432a2b002SJiri Benc 36532a2b002SJiri Benc if (tb[LWTUNNEL_IP6_DST]) 36632a2b002SJiri Benc tun_info->key.u.ipv6.dst = nla_get_in6_addr(tb[LWTUNNEL_IP6_DST]); 36732a2b002SJiri Benc 36832a2b002SJiri Benc if (tb[LWTUNNEL_IP6_SRC]) 36932a2b002SJiri Benc tun_info->key.u.ipv6.src = nla_get_in6_addr(tb[LWTUNNEL_IP6_SRC]); 37032a2b002SJiri Benc 37132a2b002SJiri Benc if (tb[LWTUNNEL_IP6_HOPLIMIT]) 37232a2b002SJiri Benc tun_info->key.ttl = nla_get_u8(tb[LWTUNNEL_IP6_HOPLIMIT]); 37332a2b002SJiri Benc 37432a2b002SJiri Benc if (tb[LWTUNNEL_IP6_TC]) 37532a2b002SJiri Benc tun_info->key.tos = nla_get_u8(tb[LWTUNNEL_IP6_TC]); 37632a2b002SJiri Benc 37732a2b002SJiri Benc if (tb[LWTUNNEL_IP6_FLAGS]) 37830d3d83aSLance Richardson tun_info->key.tun_flags = nla_get_be16(tb[LWTUNNEL_IP6_FLAGS]); 37932a2b002SJiri Benc 3807f9562a1SJiri Benc tun_info->mode = IP_TUNNEL_INFO_TX | IP_TUNNEL_INFO_IPV6; 38132a2b002SJiri Benc tun_info->options_len = 0; 38232a2b002SJiri Benc 38332a2b002SJiri Benc *ts = new_state; 38432a2b002SJiri Benc 38532a2b002SJiri Benc return 0; 38632a2b002SJiri Benc } 38732a2b002SJiri Benc 38832a2b002SJiri Benc static int ip6_tun_fill_encap_info(struct sk_buff *skb, 38932a2b002SJiri Benc struct lwtunnel_state *lwtstate) 39032a2b002SJiri Benc { 39132a2b002SJiri Benc struct ip_tunnel_info *tun_info = lwt_tun_info(lwtstate); 39232a2b002SJiri Benc 393b46f6dedSNicolas Dichtel if (nla_put_be64(skb, LWTUNNEL_IP6_ID, tun_info->key.tun_id, 394b46f6dedSNicolas Dichtel LWTUNNEL_IP6_PAD) || 39532a2b002SJiri Benc nla_put_in6_addr(skb, LWTUNNEL_IP6_DST, &tun_info->key.u.ipv6.dst) || 39632a2b002SJiri Benc nla_put_in6_addr(skb, LWTUNNEL_IP6_SRC, &tun_info->key.u.ipv6.src) || 397995096a0SQuentin Armitage nla_put_u8(skb, LWTUNNEL_IP6_TC, tun_info->key.tos) || 398995096a0SQuentin Armitage nla_put_u8(skb, LWTUNNEL_IP6_HOPLIMIT, tun_info->key.ttl) || 39930d3d83aSLance Richardson nla_put_be16(skb, LWTUNNEL_IP6_FLAGS, tun_info->key.tun_flags)) 40032a2b002SJiri Benc return -ENOMEM; 40132a2b002SJiri Benc 40232a2b002SJiri Benc return 0; 40332a2b002SJiri Benc } 40432a2b002SJiri Benc 40532a2b002SJiri Benc static int ip6_tun_encap_nlsize(struct lwtunnel_state *lwtstate) 40632a2b002SJiri Benc { 407b46f6dedSNicolas Dichtel return nla_total_size_64bit(8) /* LWTUNNEL_IP6_ID */ 40832a2b002SJiri Benc + nla_total_size(16) /* LWTUNNEL_IP6_DST */ 40932a2b002SJiri Benc + nla_total_size(16) /* LWTUNNEL_IP6_SRC */ 41032a2b002SJiri Benc + nla_total_size(1) /* LWTUNNEL_IP6_HOPLIMIT */ 41132a2b002SJiri Benc + nla_total_size(1) /* LWTUNNEL_IP6_TC */ 41232a2b002SJiri Benc + nla_total_size(2); /* LWTUNNEL_IP6_FLAGS */ 41332a2b002SJiri Benc } 41432a2b002SJiri Benc 41532a2b002SJiri Benc static const struct lwtunnel_encap_ops ip6_tun_lwt_ops = { 41632a2b002SJiri Benc .build_state = ip6_tun_build_state, 41732a2b002SJiri Benc .fill_encap = ip6_tun_fill_encap_info, 41832a2b002SJiri Benc .get_encap_size = ip6_tun_encap_nlsize, 41932a2b002SJiri Benc .cmp_encap = ip_tun_cmp_encap, 42088ff7334SRobert Shearman .owner = THIS_MODULE, 42132a2b002SJiri Benc }; 42232a2b002SJiri Benc 423045a0fa0SThomas Graf void __init ip_tunnel_core_init(void) 4243093fbe7SThomas Graf { 425fca5fdf6SDaniel Borkmann /* If you land here, make sure whether increasing ip_tunnel_info's 426fca5fdf6SDaniel Borkmann * options_len is a reasonable choice with its usage in front ends 427fca5fdf6SDaniel Borkmann * (f.e., it's part of flow keys, etc). 428fca5fdf6SDaniel Borkmann */ 429fca5fdf6SDaniel Borkmann BUILD_BUG_ON(IP_TUNNEL_OPTS_MAX != 255); 430fca5fdf6SDaniel Borkmann 4313093fbe7SThomas Graf lwtunnel_encap_add_ops(&ip_tun_lwt_ops, LWTUNNEL_ENCAP_IP); 43232a2b002SJiri Benc lwtunnel_encap_add_ops(&ip6_tun_lwt_ops, LWTUNNEL_ENCAP_IP6); 4333093fbe7SThomas Graf } 434e7030878SThomas Graf 4355263a98fSDavidlohr Bueso DEFINE_STATIC_KEY_FALSE(ip_tunnel_metadata_cnt); 436e7030878SThomas Graf EXPORT_SYMBOL(ip_tunnel_metadata_cnt); 437e7030878SThomas Graf 438e7030878SThomas Graf void ip_tunnel_need_metadata(void) 439e7030878SThomas Graf { 4405263a98fSDavidlohr Bueso static_branch_inc(&ip_tunnel_metadata_cnt); 441e7030878SThomas Graf } 442e7030878SThomas Graf EXPORT_SYMBOL_GPL(ip_tunnel_need_metadata); 443e7030878SThomas Graf 444e7030878SThomas Graf void ip_tunnel_unneed_metadata(void) 445e7030878SThomas Graf { 4465263a98fSDavidlohr Bueso static_branch_dec(&ip_tunnel_metadata_cnt); 447e7030878SThomas Graf } 448e7030878SThomas Graf EXPORT_SYMBOL_GPL(ip_tunnel_unneed_metadata); 449