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); 790e6fbc5bSPravin B Shelar if (unlikely(net_xmit_eval(err))) 800e6fbc5bSPravin B Shelar pkt_len = 0; 81039f5062SPravin B Shelar iptunnel_xmit_stats(dev, pkt_len); 820e6fbc5bSPravin B Shelar } 830e6fbc5bSPravin B Shelar EXPORT_SYMBOL_GPL(iptunnel_xmit); 843d7b46cdSPravin B Shelar 85a6d5bbf3SJiri Benc int __iptunnel_pull_header(struct sk_buff *skb, int hdr_len, 86a6d5bbf3SJiri Benc __be16 inner_proto, bool raw_proto, bool xnet) 873d7b46cdSPravin B Shelar { 883d7b46cdSPravin B Shelar if (unlikely(!pskb_may_pull(skb, hdr_len))) 893d7b46cdSPravin B Shelar return -ENOMEM; 903d7b46cdSPravin B Shelar 913d7b46cdSPravin B Shelar skb_pull_rcsum(skb, hdr_len); 923d7b46cdSPravin B Shelar 93a6d5bbf3SJiri Benc if (!raw_proto && inner_proto == htons(ETH_P_TEB)) { 941245dfc8SLi RongQing struct ethhdr *eh; 953d7b46cdSPravin B Shelar 963d7b46cdSPravin B Shelar if (unlikely(!pskb_may_pull(skb, ETH_HLEN))) 973d7b46cdSPravin B Shelar return -ENOMEM; 983d7b46cdSPravin B Shelar 991245dfc8SLi RongQing eh = (struct ethhdr *)skb->data; 100d181ddcaSAlexander Duyck if (likely(eth_proto_is_802_3(eh->h_proto))) 1013d7b46cdSPravin B Shelar skb->protocol = eh->h_proto; 1023d7b46cdSPravin B Shelar else 1033d7b46cdSPravin B Shelar skb->protocol = htons(ETH_P_802_2); 1043d7b46cdSPravin B Shelar 1053d7b46cdSPravin B Shelar } else { 1063d7b46cdSPravin B Shelar skb->protocol = inner_proto; 1073d7b46cdSPravin B Shelar } 1083d7b46cdSPravin B Shelar 1097539fadcSTom Herbert skb_clear_hash_if_not_l4(skb); 1103e2ed0c2SMichał Mirosław __vlan_hwaccel_clear_tag(skb); 1113d7b46cdSPravin B Shelar skb_set_queue_mapping(skb, 0); 1127f290c94SJiri Benc skb_scrub_packet(skb, xnet); 113a09a4c8dSJesse Gross 114a09a4c8dSJesse Gross return iptunnel_pull_offloads(skb); 1153d7b46cdSPravin B Shelar } 116a6d5bbf3SJiri Benc EXPORT_SYMBOL_GPL(__iptunnel_pull_header); 1172d26f0a3SEric Dumazet 11863d008a4SJiri Benc struct metadata_dst *iptunnel_metadata_reply(struct metadata_dst *md, 11963d008a4SJiri Benc gfp_t flags) 12063d008a4SJiri Benc { 12163d008a4SJiri Benc struct metadata_dst *res; 12263d008a4SJiri Benc struct ip_tunnel_info *dst, *src; 12363d008a4SJiri Benc 1243fcece12SJakub Kicinski if (!md || md->type != METADATA_IP_TUNNEL || 1253fcece12SJakub Kicinski md->u.tun_info.mode & IP_TUNNEL_INFO_TX) 1263fcece12SJakub Kicinski 12763d008a4SJiri Benc return NULL; 12863d008a4SJiri Benc 1293fcece12SJakub Kicinski res = metadata_dst_alloc(0, METADATA_IP_TUNNEL, flags); 13063d008a4SJiri Benc if (!res) 13163d008a4SJiri Benc return NULL; 13263d008a4SJiri Benc 13363d008a4SJiri Benc dst = &res->u.tun_info; 13463d008a4SJiri Benc src = &md->u.tun_info; 13563d008a4SJiri Benc dst->key.tun_id = src->key.tun_id; 13663d008a4SJiri Benc if (src->mode & IP_TUNNEL_INFO_IPV6) 13763d008a4SJiri Benc memcpy(&dst->key.u.ipv6.dst, &src->key.u.ipv6.src, 13863d008a4SJiri Benc sizeof(struct in6_addr)); 13963d008a4SJiri Benc else 14063d008a4SJiri Benc dst->key.u.ipv4.dst = src->key.u.ipv4.src; 1417bdca378Swenxu dst->key.tun_flags = src->key.tun_flags; 14263d008a4SJiri Benc dst->mode = src->mode | IP_TUNNEL_INFO_TX; 14363d008a4SJiri Benc 14463d008a4SJiri Benc return res; 14563d008a4SJiri Benc } 14663d008a4SJiri Benc EXPORT_SYMBOL_GPL(iptunnel_metadata_reply); 14763d008a4SJiri Benc 148aed069dfSAlexander Duyck int iptunnel_handle_offloads(struct sk_buff *skb, 1492d26f0a3SEric Dumazet int gso_type_mask) 1502d26f0a3SEric Dumazet { 1512d26f0a3SEric Dumazet int err; 1522d26f0a3SEric Dumazet 1532d26f0a3SEric Dumazet if (likely(!skb->encapsulation)) { 1542d26f0a3SEric Dumazet skb_reset_inner_headers(skb); 1552d26f0a3SEric Dumazet skb->encapsulation = 1; 1562d26f0a3SEric Dumazet } 1572d26f0a3SEric Dumazet 1582d26f0a3SEric Dumazet if (skb_is_gso(skb)) { 1599580bf2eSEric Dumazet err = skb_header_unclone(skb, GFP_ATOMIC); 1602d26f0a3SEric Dumazet if (unlikely(err)) 161aed069dfSAlexander Duyck return err; 1622d26f0a3SEric Dumazet skb_shinfo(skb)->gso_type |= gso_type_mask; 163aed069dfSAlexander Duyck return 0; 1642d26f0a3SEric Dumazet } 1652d26f0a3SEric Dumazet 1666fa79666SEdward Cree if (skb->ip_summed != CHECKSUM_PARTIAL) { 1672d26f0a3SEric Dumazet skb->ip_summed = CHECKSUM_NONE; 1686fa79666SEdward Cree /* We clear encapsulation here to prevent badly-written 1696fa79666SEdward Cree * drivers potentially deciding to offload an inner checksum 1706fa79666SEdward Cree * if we set CHECKSUM_PARTIAL on the outer header. 1716fa79666SEdward Cree * This should go away when the drivers are all fixed. 1726fa79666SEdward Cree */ 173179bc67fSEdward Cree skb->encapsulation = 0; 174179bc67fSEdward Cree } 1752d26f0a3SEric Dumazet 176aed069dfSAlexander Duyck return 0; 1772d26f0a3SEric Dumazet } 1782d26f0a3SEric Dumazet EXPORT_SYMBOL_GPL(iptunnel_handle_offloads); 179ebe44f35SDavid S. Miller 180ebe44f35SDavid S. Miller /* Often modified stats are per cpu, other are shared (netdev->stats) */ 181bc1f4470Sstephen hemminger void ip_tunnel_get_stats64(struct net_device *dev, 182ebe44f35SDavid S. Miller struct rtnl_link_stats64 *tot) 183ebe44f35SDavid S. Miller { 184ebe44f35SDavid S. Miller int i; 185ebe44f35SDavid S. Miller 186c24a5964SAlexander Duyck netdev_stats_to_stats64(tot, &dev->stats); 187c24a5964SAlexander Duyck 188ebe44f35SDavid S. Miller for_each_possible_cpu(i) { 189ebe44f35SDavid S. Miller const struct pcpu_sw_netstats *tstats = 190ebe44f35SDavid S. Miller per_cpu_ptr(dev->tstats, i); 191ebe44f35SDavid S. Miller u64 rx_packets, rx_bytes, tx_packets, tx_bytes; 192ebe44f35SDavid S. Miller unsigned int start; 193ebe44f35SDavid S. Miller 194ebe44f35SDavid S. Miller do { 19557a7744eSEric W. Biederman start = u64_stats_fetch_begin_irq(&tstats->syncp); 196ebe44f35SDavid S. Miller rx_packets = tstats->rx_packets; 197ebe44f35SDavid S. Miller tx_packets = tstats->tx_packets; 198ebe44f35SDavid S. Miller rx_bytes = tstats->rx_bytes; 199ebe44f35SDavid S. Miller tx_bytes = tstats->tx_bytes; 20057a7744eSEric W. Biederman } while (u64_stats_fetch_retry_irq(&tstats->syncp, start)); 201ebe44f35SDavid S. Miller 202ebe44f35SDavid S. Miller tot->rx_packets += rx_packets; 203ebe44f35SDavid S. Miller tot->tx_packets += tx_packets; 204ebe44f35SDavid S. Miller tot->rx_bytes += rx_bytes; 205ebe44f35SDavid S. Miller tot->tx_bytes += tx_bytes; 206ebe44f35SDavid S. Miller } 207ebe44f35SDavid S. Miller } 208ebe44f35SDavid S. Miller EXPORT_SYMBOL_GPL(ip_tunnel_get_stats64); 2093093fbe7SThomas Graf 210a1c234f9SJiri Benc static const struct nla_policy ip_tun_policy[LWTUNNEL_IP_MAX + 1] = { 211a1c234f9SJiri Benc [LWTUNNEL_IP_ID] = { .type = NLA_U64 }, 212a1c234f9SJiri Benc [LWTUNNEL_IP_DST] = { .type = NLA_U32 }, 213a1c234f9SJiri Benc [LWTUNNEL_IP_SRC] = { .type = NLA_U32 }, 214a1c234f9SJiri Benc [LWTUNNEL_IP_TTL] = { .type = NLA_U8 }, 215a1c234f9SJiri Benc [LWTUNNEL_IP_TOS] = { .type = NLA_U8 }, 216a1c234f9SJiri Benc [LWTUNNEL_IP_FLAGS] = { .type = NLA_U16 }, 2173093fbe7SThomas Graf }; 2183093fbe7SThomas Graf 21930357d7dSDavid Ahern static int ip_tun_build_state(struct nlattr *attr, 220127eb7cdSTom Herbert unsigned int family, const void *cfg, 2219ae28727SDavid Ahern struct lwtunnel_state **ts, 2229ae28727SDavid Ahern struct netlink_ext_ack *extack) 2233093fbe7SThomas Graf { 2243093fbe7SThomas Graf struct ip_tunnel_info *tun_info; 2253093fbe7SThomas Graf struct lwtunnel_state *new_state; 226a1c234f9SJiri Benc struct nlattr *tb[LWTUNNEL_IP_MAX + 1]; 2273093fbe7SThomas Graf int err; 2283093fbe7SThomas Graf 2298cb08174SJohannes Berg err = nla_parse_nested_deprecated(tb, LWTUNNEL_IP_MAX, attr, 2308cb08174SJohannes Berg ip_tun_policy, extack); 2313093fbe7SThomas Graf if (err < 0) 2323093fbe7SThomas Graf return err; 2333093fbe7SThomas Graf 2343093fbe7SThomas Graf new_state = lwtunnel_state_alloc(sizeof(*tun_info)); 2353093fbe7SThomas Graf if (!new_state) 2363093fbe7SThomas Graf return -ENOMEM; 2373093fbe7SThomas Graf 2383093fbe7SThomas Graf new_state->type = LWTUNNEL_ENCAP_IP; 2393093fbe7SThomas Graf 2403093fbe7SThomas Graf tun_info = lwt_tun_info(new_state); 2413093fbe7SThomas Graf 2423d25eabbSwenxu #ifdef CONFIG_DST_CACHE 2433d25eabbSwenxu err = dst_cache_init(&tun_info->dst_cache, GFP_KERNEL); 2443d25eabbSwenxu if (err) { 2453d25eabbSwenxu lwtstate_free(new_state); 2463d25eabbSwenxu return err; 2473d25eabbSwenxu } 2483d25eabbSwenxu #endif 2493d25eabbSwenxu 250a1c234f9SJiri Benc if (tb[LWTUNNEL_IP_ID]) 25130d3d83aSLance Richardson tun_info->key.tun_id = nla_get_be64(tb[LWTUNNEL_IP_ID]); 2523093fbe7SThomas Graf 253a1c234f9SJiri Benc if (tb[LWTUNNEL_IP_DST]) 2547822ce73SHaishuang Yan tun_info->key.u.ipv4.dst = nla_get_in_addr(tb[LWTUNNEL_IP_DST]); 2553093fbe7SThomas Graf 256a1c234f9SJiri Benc if (tb[LWTUNNEL_IP_SRC]) 2577822ce73SHaishuang Yan tun_info->key.u.ipv4.src = nla_get_in_addr(tb[LWTUNNEL_IP_SRC]); 2583093fbe7SThomas Graf 259a1c234f9SJiri Benc if (tb[LWTUNNEL_IP_TTL]) 2607c383fb2SJiri Benc tun_info->key.ttl = nla_get_u8(tb[LWTUNNEL_IP_TTL]); 2613093fbe7SThomas Graf 262a1c234f9SJiri Benc if (tb[LWTUNNEL_IP_TOS]) 2637c383fb2SJiri Benc tun_info->key.tos = nla_get_u8(tb[LWTUNNEL_IP_TOS]); 2643093fbe7SThomas Graf 265a1c234f9SJiri Benc if (tb[LWTUNNEL_IP_FLAGS]) 26630d3d83aSLance Richardson tun_info->key.tun_flags = nla_get_be16(tb[LWTUNNEL_IP_FLAGS]); 2673093fbe7SThomas Graf 2683093fbe7SThomas Graf tun_info->mode = IP_TUNNEL_INFO_TX; 2693093fbe7SThomas Graf tun_info->options_len = 0; 2703093fbe7SThomas Graf 2713093fbe7SThomas Graf *ts = new_state; 2723093fbe7SThomas Graf 2733093fbe7SThomas Graf return 0; 2743093fbe7SThomas Graf } 2753093fbe7SThomas Graf 2763d25eabbSwenxu static void ip_tun_destroy_state(struct lwtunnel_state *lwtstate) 2773d25eabbSwenxu { 2783d25eabbSwenxu #ifdef CONFIG_DST_CACHE 2793d25eabbSwenxu struct ip_tunnel_info *tun_info = lwt_tun_info(lwtstate); 2803d25eabbSwenxu 2813d25eabbSwenxu dst_cache_destroy(&tun_info->dst_cache); 2823d25eabbSwenxu #endif 2833d25eabbSwenxu } 2843d25eabbSwenxu 2853093fbe7SThomas Graf static int ip_tun_fill_encap_info(struct sk_buff *skb, 2863093fbe7SThomas Graf struct lwtunnel_state *lwtstate) 2873093fbe7SThomas Graf { 2883093fbe7SThomas Graf struct ip_tunnel_info *tun_info = lwt_tun_info(lwtstate); 2893093fbe7SThomas Graf 290b46f6dedSNicolas Dichtel if (nla_put_be64(skb, LWTUNNEL_IP_ID, tun_info->key.tun_id, 291b46f6dedSNicolas Dichtel LWTUNNEL_IP_PAD) || 2927822ce73SHaishuang Yan nla_put_in_addr(skb, LWTUNNEL_IP_DST, tun_info->key.u.ipv4.dst) || 2937822ce73SHaishuang Yan nla_put_in_addr(skb, LWTUNNEL_IP_SRC, tun_info->key.u.ipv4.src) || 2947c383fb2SJiri Benc nla_put_u8(skb, LWTUNNEL_IP_TOS, tun_info->key.tos) || 2957c383fb2SJiri Benc nla_put_u8(skb, LWTUNNEL_IP_TTL, tun_info->key.ttl) || 29630d3d83aSLance Richardson nla_put_be16(skb, LWTUNNEL_IP_FLAGS, tun_info->key.tun_flags)) 2973093fbe7SThomas Graf return -ENOMEM; 2983093fbe7SThomas Graf 2993093fbe7SThomas Graf return 0; 3003093fbe7SThomas Graf } 3013093fbe7SThomas Graf 3023093fbe7SThomas Graf static int ip_tun_encap_nlsize(struct lwtunnel_state *lwtstate) 3033093fbe7SThomas Graf { 304b46f6dedSNicolas Dichtel return nla_total_size_64bit(8) /* LWTUNNEL_IP_ID */ 305a1c234f9SJiri Benc + nla_total_size(4) /* LWTUNNEL_IP_DST */ 306a1c234f9SJiri Benc + nla_total_size(4) /* LWTUNNEL_IP_SRC */ 307a1c234f9SJiri Benc + nla_total_size(1) /* LWTUNNEL_IP_TOS */ 308a1c234f9SJiri Benc + nla_total_size(1) /* LWTUNNEL_IP_TTL */ 309a1c234f9SJiri Benc + nla_total_size(2); /* LWTUNNEL_IP_FLAGS */ 3103093fbe7SThomas Graf } 3113093fbe7SThomas Graf 3122d798499SJiri Benc static int ip_tun_cmp_encap(struct lwtunnel_state *a, struct lwtunnel_state *b) 3132d798499SJiri Benc { 3142d798499SJiri Benc return memcmp(lwt_tun_info(a), lwt_tun_info(b), 3152d798499SJiri Benc sizeof(struct ip_tunnel_info)); 3162d798499SJiri Benc } 3172d798499SJiri Benc 3183093fbe7SThomas Graf static const struct lwtunnel_encap_ops ip_tun_lwt_ops = { 3193093fbe7SThomas Graf .build_state = ip_tun_build_state, 3203d25eabbSwenxu .destroy_state = ip_tun_destroy_state, 3213093fbe7SThomas Graf .fill_encap = ip_tun_fill_encap_info, 3223093fbe7SThomas Graf .get_encap_size = ip_tun_encap_nlsize, 3232d798499SJiri Benc .cmp_encap = ip_tun_cmp_encap, 32488ff7334SRobert Shearman .owner = THIS_MODULE, 3253093fbe7SThomas Graf }; 3263093fbe7SThomas Graf 32732a2b002SJiri Benc static const struct nla_policy ip6_tun_policy[LWTUNNEL_IP6_MAX + 1] = { 32832a2b002SJiri Benc [LWTUNNEL_IP6_ID] = { .type = NLA_U64 }, 32932a2b002SJiri Benc [LWTUNNEL_IP6_DST] = { .len = sizeof(struct in6_addr) }, 33032a2b002SJiri Benc [LWTUNNEL_IP6_SRC] = { .len = sizeof(struct in6_addr) }, 33132a2b002SJiri Benc [LWTUNNEL_IP6_HOPLIMIT] = { .type = NLA_U8 }, 33232a2b002SJiri Benc [LWTUNNEL_IP6_TC] = { .type = NLA_U8 }, 33332a2b002SJiri Benc [LWTUNNEL_IP6_FLAGS] = { .type = NLA_U16 }, 33432a2b002SJiri Benc }; 33532a2b002SJiri Benc 33630357d7dSDavid Ahern static int ip6_tun_build_state(struct nlattr *attr, 337127eb7cdSTom Herbert unsigned int family, const void *cfg, 3389ae28727SDavid Ahern struct lwtunnel_state **ts, 3399ae28727SDavid Ahern struct netlink_ext_ack *extack) 34032a2b002SJiri Benc { 34132a2b002SJiri Benc struct ip_tunnel_info *tun_info; 34232a2b002SJiri Benc struct lwtunnel_state *new_state; 34332a2b002SJiri Benc struct nlattr *tb[LWTUNNEL_IP6_MAX + 1]; 34432a2b002SJiri Benc int err; 34532a2b002SJiri Benc 3468cb08174SJohannes Berg err = nla_parse_nested_deprecated(tb, LWTUNNEL_IP6_MAX, attr, 3478cb08174SJohannes Berg ip6_tun_policy, extack); 34832a2b002SJiri Benc if (err < 0) 34932a2b002SJiri Benc return err; 35032a2b002SJiri Benc 35132a2b002SJiri Benc new_state = lwtunnel_state_alloc(sizeof(*tun_info)); 35232a2b002SJiri Benc if (!new_state) 35332a2b002SJiri Benc return -ENOMEM; 35432a2b002SJiri Benc 35532a2b002SJiri Benc new_state->type = LWTUNNEL_ENCAP_IP6; 35632a2b002SJiri Benc 35732a2b002SJiri Benc tun_info = lwt_tun_info(new_state); 35832a2b002SJiri Benc 35932a2b002SJiri Benc if (tb[LWTUNNEL_IP6_ID]) 36030d3d83aSLance Richardson tun_info->key.tun_id = nla_get_be64(tb[LWTUNNEL_IP6_ID]); 36132a2b002SJiri Benc 36232a2b002SJiri Benc if (tb[LWTUNNEL_IP6_DST]) 36332a2b002SJiri Benc tun_info->key.u.ipv6.dst = nla_get_in6_addr(tb[LWTUNNEL_IP6_DST]); 36432a2b002SJiri Benc 36532a2b002SJiri Benc if (tb[LWTUNNEL_IP6_SRC]) 36632a2b002SJiri Benc tun_info->key.u.ipv6.src = nla_get_in6_addr(tb[LWTUNNEL_IP6_SRC]); 36732a2b002SJiri Benc 36832a2b002SJiri Benc if (tb[LWTUNNEL_IP6_HOPLIMIT]) 36932a2b002SJiri Benc tun_info->key.ttl = nla_get_u8(tb[LWTUNNEL_IP6_HOPLIMIT]); 37032a2b002SJiri Benc 37132a2b002SJiri Benc if (tb[LWTUNNEL_IP6_TC]) 37232a2b002SJiri Benc tun_info->key.tos = nla_get_u8(tb[LWTUNNEL_IP6_TC]); 37332a2b002SJiri Benc 37432a2b002SJiri Benc if (tb[LWTUNNEL_IP6_FLAGS]) 37530d3d83aSLance Richardson tun_info->key.tun_flags = nla_get_be16(tb[LWTUNNEL_IP6_FLAGS]); 37632a2b002SJiri Benc 3777f9562a1SJiri Benc tun_info->mode = IP_TUNNEL_INFO_TX | IP_TUNNEL_INFO_IPV6; 37832a2b002SJiri Benc tun_info->options_len = 0; 37932a2b002SJiri Benc 38032a2b002SJiri Benc *ts = new_state; 38132a2b002SJiri Benc 38232a2b002SJiri Benc return 0; 38332a2b002SJiri Benc } 38432a2b002SJiri Benc 38532a2b002SJiri Benc static int ip6_tun_fill_encap_info(struct sk_buff *skb, 38632a2b002SJiri Benc struct lwtunnel_state *lwtstate) 38732a2b002SJiri Benc { 38832a2b002SJiri Benc struct ip_tunnel_info *tun_info = lwt_tun_info(lwtstate); 38932a2b002SJiri Benc 390b46f6dedSNicolas Dichtel if (nla_put_be64(skb, LWTUNNEL_IP6_ID, tun_info->key.tun_id, 391b46f6dedSNicolas Dichtel LWTUNNEL_IP6_PAD) || 39232a2b002SJiri Benc nla_put_in6_addr(skb, LWTUNNEL_IP6_DST, &tun_info->key.u.ipv6.dst) || 39332a2b002SJiri Benc nla_put_in6_addr(skb, LWTUNNEL_IP6_SRC, &tun_info->key.u.ipv6.src) || 394995096a0SQuentin Armitage nla_put_u8(skb, LWTUNNEL_IP6_TC, tun_info->key.tos) || 395995096a0SQuentin Armitage nla_put_u8(skb, LWTUNNEL_IP6_HOPLIMIT, tun_info->key.ttl) || 39630d3d83aSLance Richardson nla_put_be16(skb, LWTUNNEL_IP6_FLAGS, tun_info->key.tun_flags)) 39732a2b002SJiri Benc return -ENOMEM; 39832a2b002SJiri Benc 39932a2b002SJiri Benc return 0; 40032a2b002SJiri Benc } 40132a2b002SJiri Benc 40232a2b002SJiri Benc static int ip6_tun_encap_nlsize(struct lwtunnel_state *lwtstate) 40332a2b002SJiri Benc { 404b46f6dedSNicolas Dichtel return nla_total_size_64bit(8) /* LWTUNNEL_IP6_ID */ 40532a2b002SJiri Benc + nla_total_size(16) /* LWTUNNEL_IP6_DST */ 40632a2b002SJiri Benc + nla_total_size(16) /* LWTUNNEL_IP6_SRC */ 40732a2b002SJiri Benc + nla_total_size(1) /* LWTUNNEL_IP6_HOPLIMIT */ 40832a2b002SJiri Benc + nla_total_size(1) /* LWTUNNEL_IP6_TC */ 40932a2b002SJiri Benc + nla_total_size(2); /* LWTUNNEL_IP6_FLAGS */ 41032a2b002SJiri Benc } 41132a2b002SJiri Benc 41232a2b002SJiri Benc static const struct lwtunnel_encap_ops ip6_tun_lwt_ops = { 41332a2b002SJiri Benc .build_state = ip6_tun_build_state, 41432a2b002SJiri Benc .fill_encap = ip6_tun_fill_encap_info, 41532a2b002SJiri Benc .get_encap_size = ip6_tun_encap_nlsize, 41632a2b002SJiri Benc .cmp_encap = ip_tun_cmp_encap, 41788ff7334SRobert Shearman .owner = THIS_MODULE, 41832a2b002SJiri Benc }; 41932a2b002SJiri Benc 420045a0fa0SThomas Graf void __init ip_tunnel_core_init(void) 4213093fbe7SThomas Graf { 422fca5fdf6SDaniel Borkmann /* If you land here, make sure whether increasing ip_tunnel_info's 423fca5fdf6SDaniel Borkmann * options_len is a reasonable choice with its usage in front ends 424fca5fdf6SDaniel Borkmann * (f.e., it's part of flow keys, etc). 425fca5fdf6SDaniel Borkmann */ 426fca5fdf6SDaniel Borkmann BUILD_BUG_ON(IP_TUNNEL_OPTS_MAX != 255); 427fca5fdf6SDaniel Borkmann 4283093fbe7SThomas Graf lwtunnel_encap_add_ops(&ip_tun_lwt_ops, LWTUNNEL_ENCAP_IP); 42932a2b002SJiri Benc lwtunnel_encap_add_ops(&ip6_tun_lwt_ops, LWTUNNEL_ENCAP_IP6); 4303093fbe7SThomas Graf } 431e7030878SThomas Graf 4325263a98fSDavidlohr Bueso DEFINE_STATIC_KEY_FALSE(ip_tunnel_metadata_cnt); 433e7030878SThomas Graf EXPORT_SYMBOL(ip_tunnel_metadata_cnt); 434e7030878SThomas Graf 435e7030878SThomas Graf void ip_tunnel_need_metadata(void) 436e7030878SThomas Graf { 4375263a98fSDavidlohr Bueso static_branch_inc(&ip_tunnel_metadata_cnt); 438e7030878SThomas Graf } 439e7030878SThomas Graf EXPORT_SYMBOL_GPL(ip_tunnel_need_metadata); 440e7030878SThomas Graf 441e7030878SThomas Graf void ip_tunnel_unneed_metadata(void) 442e7030878SThomas Graf { 4435263a98fSDavidlohr Bueso static_branch_dec(&ip_tunnel_metadata_cnt); 444e7030878SThomas Graf } 445e7030878SThomas Graf EXPORT_SYMBOL_GPL(ip_tunnel_unneed_metadata); 446