10e6fbc5bSPravin B Shelar /* 20e6fbc5bSPravin B Shelar * Copyright (c) 2013 Nicira, Inc. 30e6fbc5bSPravin B Shelar * 40e6fbc5bSPravin B Shelar * This program is free software; you can redistribute it and/or 50e6fbc5bSPravin B Shelar * modify it under the terms of version 2 of the GNU General Public 60e6fbc5bSPravin B Shelar * License as published by the Free Software Foundation. 70e6fbc5bSPravin B Shelar * 80e6fbc5bSPravin B Shelar * This program is distributed in the hope that it will be useful, but 90e6fbc5bSPravin B Shelar * WITHOUT ANY WARRANTY; without even the implied warranty of 100e6fbc5bSPravin B Shelar * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 110e6fbc5bSPravin B Shelar * General Public License for more details. 120e6fbc5bSPravin B Shelar * 130e6fbc5bSPravin B Shelar * You should have received a copy of the GNU General Public License 140e6fbc5bSPravin B Shelar * along with this program; if not, write to the Free Software 150e6fbc5bSPravin B Shelar * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 160e6fbc5bSPravin B Shelar * 02110-1301, USA 170e6fbc5bSPravin B Shelar */ 180e6fbc5bSPravin B Shelar 190e6fbc5bSPravin B Shelar #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 200e6fbc5bSPravin B Shelar 210e6fbc5bSPravin B Shelar #include <linux/types.h> 220e6fbc5bSPravin B Shelar #include <linux/kernel.h> 230e6fbc5bSPravin B Shelar #include <linux/skbuff.h> 240e6fbc5bSPravin B Shelar #include <linux/netdevice.h> 250e6fbc5bSPravin B Shelar #include <linux/in.h> 260e6fbc5bSPravin B Shelar #include <linux/if_arp.h> 270e6fbc5bSPravin B Shelar #include <linux/mroute.h> 280e6fbc5bSPravin B Shelar #include <linux/init.h> 290e6fbc5bSPravin B Shelar #include <linux/in6.h> 300e6fbc5bSPravin B Shelar #include <linux/inetdevice.h> 310e6fbc5bSPravin B Shelar #include <linux/netfilter_ipv4.h> 320e6fbc5bSPravin B Shelar #include <linux/etherdevice.h> 330e6fbc5bSPravin B Shelar #include <linux/if_ether.h> 340e6fbc5bSPravin B Shelar #include <linux/if_vlan.h> 35e7030878SThomas Graf #include <linux/static_key.h> 360e6fbc5bSPravin B Shelar 370e6fbc5bSPravin B Shelar #include <net/ip.h> 380e6fbc5bSPravin B Shelar #include <net/icmp.h> 390e6fbc5bSPravin B Shelar #include <net/protocol.h> 400e6fbc5bSPravin B Shelar #include <net/ip_tunnels.h> 410e6fbc5bSPravin B Shelar #include <net/arp.h> 420e6fbc5bSPravin B Shelar #include <net/checksum.h> 430e6fbc5bSPravin B Shelar #include <net/dsfield.h> 440e6fbc5bSPravin B Shelar #include <net/inet_ecn.h> 450e6fbc5bSPravin B Shelar #include <net/xfrm.h> 460e6fbc5bSPravin B Shelar #include <net/net_namespace.h> 470e6fbc5bSPravin B Shelar #include <net/netns/generic.h> 480e6fbc5bSPravin B Shelar #include <net/rtnetlink.h> 4963d008a4SJiri Benc #include <net/dst_metadata.h> 500e6fbc5bSPravin B Shelar 51aad88724SEric Dumazet int iptunnel_xmit(struct sock *sk, struct rtable *rt, struct sk_buff *skb, 520e6fbc5bSPravin B Shelar __be32 src, __be32 dst, __u8 proto, 53963a88b3SNicolas Dichtel __u8 tos, __u8 ttl, __be16 df, bool xnet) 540e6fbc5bSPravin B Shelar { 55bc22a0e2SNicolas Dichtel int pkt_len = skb->len - skb_inner_network_offset(skb); 56f859b0f6SEric W. Biederman struct net *net = dev_net(rt->dst.dev); 570e6fbc5bSPravin B Shelar struct iphdr *iph; 580e6fbc5bSPravin B Shelar int err; 590e6fbc5bSPravin B Shelar 60963a88b3SNicolas Dichtel skb_scrub_packet(skb, xnet); 61963a88b3SNicolas Dichtel 627539fadcSTom Herbert skb_clear_hash(skb); 630e6fbc5bSPravin B Shelar skb_dst_set(skb, &rt->dst); 640e6fbc5bSPravin B Shelar memset(IPCB(skb), 0, sizeof(*IPCB(skb))); 650e6fbc5bSPravin B Shelar 660e6fbc5bSPravin B Shelar /* Push down and install the IP header. */ 6778a3694dSSteffen Klassert skb_push(skb, sizeof(struct iphdr)); 680e6fbc5bSPravin B Shelar skb_reset_network_header(skb); 690e6fbc5bSPravin B Shelar 700e6fbc5bSPravin B Shelar iph = ip_hdr(skb); 710e6fbc5bSPravin B Shelar 720e6fbc5bSPravin B Shelar iph->version = 4; 730e6fbc5bSPravin B Shelar iph->ihl = sizeof(struct iphdr) >> 2; 740e6fbc5bSPravin B Shelar iph->frag_off = df; 750e6fbc5bSPravin B Shelar iph->protocol = proto; 760e6fbc5bSPravin B Shelar iph->tos = tos; 770e6fbc5bSPravin B Shelar iph->daddr = dst; 780e6fbc5bSPravin B Shelar iph->saddr = src; 790e6fbc5bSPravin B Shelar iph->ttl = ttl; 80f859b0f6SEric W. Biederman __ip_select_ident(net, iph, skb_shinfo(skb)->gso_segs ?: 1); 810e6fbc5bSPravin B Shelar 82e2cb77dbSEric W. Biederman err = ip_local_out(sk, skb); 830e6fbc5bSPravin B Shelar if (unlikely(net_xmit_eval(err))) 840e6fbc5bSPravin B Shelar pkt_len = 0; 850e6fbc5bSPravin B Shelar return pkt_len; 860e6fbc5bSPravin B Shelar } 870e6fbc5bSPravin B Shelar EXPORT_SYMBOL_GPL(iptunnel_xmit); 883d7b46cdSPravin B Shelar 893d7b46cdSPravin B Shelar int iptunnel_pull_header(struct sk_buff *skb, int hdr_len, __be16 inner_proto) 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 963d7b46cdSPravin B Shelar if (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 1123d7b46cdSPravin B Shelar nf_reset(skb); 1133d7b46cdSPravin B Shelar secpath_reset(skb); 1147539fadcSTom Herbert skb_clear_hash_if_not_l4(skb); 115fbd02dd4SPravin B Shelar skb_dst_drop(skb); 1163d7b46cdSPravin B Shelar skb->vlan_tci = 0; 1173d7b46cdSPravin B Shelar skb_set_queue_mapping(skb, 0); 1183d7b46cdSPravin B Shelar skb->pkt_type = PACKET_HOST; 1193d7b46cdSPravin B Shelar return 0; 1203d7b46cdSPravin B Shelar } 1213d7b46cdSPravin B Shelar EXPORT_SYMBOL_GPL(iptunnel_pull_header); 1222d26f0a3SEric Dumazet 12363d008a4SJiri Benc struct metadata_dst *iptunnel_metadata_reply(struct metadata_dst *md, 12463d008a4SJiri Benc gfp_t flags) 12563d008a4SJiri Benc { 12663d008a4SJiri Benc struct metadata_dst *res; 12763d008a4SJiri Benc struct ip_tunnel_info *dst, *src; 12863d008a4SJiri Benc 12963d008a4SJiri Benc if (!md || md->u.tun_info.mode & IP_TUNNEL_INFO_TX) 13063d008a4SJiri Benc return NULL; 13163d008a4SJiri Benc 13263d008a4SJiri Benc res = metadata_dst_alloc(0, 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; 14463d008a4SJiri Benc dst->mode = src->mode | IP_TUNNEL_INFO_TX; 14563d008a4SJiri Benc 14663d008a4SJiri Benc return res; 14763d008a4SJiri Benc } 14863d008a4SJiri Benc EXPORT_SYMBOL_GPL(iptunnel_metadata_reply); 14963d008a4SJiri Benc 1502d26f0a3SEric Dumazet struct sk_buff *iptunnel_handle_offloads(struct sk_buff *skb, 1512d26f0a3SEric Dumazet bool csum_help, 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)) { 1622d26f0a3SEric Dumazet err = skb_unclone(skb, GFP_ATOMIC); 1632d26f0a3SEric Dumazet if (unlikely(err)) 1642d26f0a3SEric Dumazet goto error; 1652d26f0a3SEric Dumazet skb_shinfo(skb)->gso_type |= gso_type_mask; 1662d26f0a3SEric Dumazet return skb; 1672d26f0a3SEric Dumazet } 1682d26f0a3SEric Dumazet 1697e2b10c1STom Herbert /* If packet is not gso and we are resolving any partial checksum, 1707e2b10c1STom Herbert * clear encapsulation flag. This allows setting CHECKSUM_PARTIAL 1717e2b10c1STom Herbert * on the outer header without confusing devices that implement 1727e2b10c1STom Herbert * NETIF_F_IP_CSUM with encapsulation. 1737e2b10c1STom Herbert */ 1747e2b10c1STom Herbert if (csum_help) 1757e2b10c1STom Herbert skb->encapsulation = 0; 1767e2b10c1STom Herbert 1772d26f0a3SEric Dumazet if (skb->ip_summed == CHECKSUM_PARTIAL && csum_help) { 1782d26f0a3SEric Dumazet err = skb_checksum_help(skb); 1792d26f0a3SEric Dumazet if (unlikely(err)) 1802d26f0a3SEric Dumazet goto error; 1812d26f0a3SEric Dumazet } else if (skb->ip_summed != CHECKSUM_PARTIAL) 1822d26f0a3SEric Dumazet skb->ip_summed = CHECKSUM_NONE; 1832d26f0a3SEric Dumazet 1842d26f0a3SEric Dumazet return skb; 1852d26f0a3SEric Dumazet error: 1862d26f0a3SEric Dumazet kfree_skb(skb); 1872d26f0a3SEric Dumazet return ERR_PTR(err); 1882d26f0a3SEric Dumazet } 1892d26f0a3SEric Dumazet EXPORT_SYMBOL_GPL(iptunnel_handle_offloads); 190ebe44f35SDavid S. Miller 191ebe44f35SDavid S. Miller /* Often modified stats are per cpu, other are shared (netdev->stats) */ 192ebe44f35SDavid S. Miller struct rtnl_link_stats64 *ip_tunnel_get_stats64(struct net_device *dev, 193ebe44f35SDavid S. Miller struct rtnl_link_stats64 *tot) 194ebe44f35SDavid S. Miller { 195ebe44f35SDavid S. Miller int i; 196ebe44f35SDavid S. Miller 197c24a5964SAlexander Duyck netdev_stats_to_stats64(tot, &dev->stats); 198c24a5964SAlexander Duyck 199ebe44f35SDavid S. Miller for_each_possible_cpu(i) { 200ebe44f35SDavid S. Miller const struct pcpu_sw_netstats *tstats = 201ebe44f35SDavid S. Miller per_cpu_ptr(dev->tstats, i); 202ebe44f35SDavid S. Miller u64 rx_packets, rx_bytes, tx_packets, tx_bytes; 203ebe44f35SDavid S. Miller unsigned int start; 204ebe44f35SDavid S. Miller 205ebe44f35SDavid S. Miller do { 20657a7744eSEric W. Biederman start = u64_stats_fetch_begin_irq(&tstats->syncp); 207ebe44f35SDavid S. Miller rx_packets = tstats->rx_packets; 208ebe44f35SDavid S. Miller tx_packets = tstats->tx_packets; 209ebe44f35SDavid S. Miller rx_bytes = tstats->rx_bytes; 210ebe44f35SDavid S. Miller tx_bytes = tstats->tx_bytes; 21157a7744eSEric W. Biederman } while (u64_stats_fetch_retry_irq(&tstats->syncp, start)); 212ebe44f35SDavid S. Miller 213ebe44f35SDavid S. Miller tot->rx_packets += rx_packets; 214ebe44f35SDavid S. Miller tot->tx_packets += tx_packets; 215ebe44f35SDavid S. Miller tot->rx_bytes += rx_bytes; 216ebe44f35SDavid S. Miller tot->tx_bytes += tx_bytes; 217ebe44f35SDavid S. Miller } 218ebe44f35SDavid S. Miller 219ebe44f35SDavid S. Miller return tot; 220ebe44f35SDavid S. Miller } 221ebe44f35SDavid S. Miller EXPORT_SYMBOL_GPL(ip_tunnel_get_stats64); 2223093fbe7SThomas Graf 223a1c234f9SJiri Benc static const struct nla_policy ip_tun_policy[LWTUNNEL_IP_MAX + 1] = { 224a1c234f9SJiri Benc [LWTUNNEL_IP_ID] = { .type = NLA_U64 }, 225a1c234f9SJiri Benc [LWTUNNEL_IP_DST] = { .type = NLA_U32 }, 226a1c234f9SJiri Benc [LWTUNNEL_IP_SRC] = { .type = NLA_U32 }, 227a1c234f9SJiri Benc [LWTUNNEL_IP_TTL] = { .type = NLA_U8 }, 228a1c234f9SJiri Benc [LWTUNNEL_IP_TOS] = { .type = NLA_U8 }, 229a1c234f9SJiri Benc [LWTUNNEL_IP_FLAGS] = { .type = NLA_U16 }, 2303093fbe7SThomas Graf }; 2313093fbe7SThomas Graf 2323093fbe7SThomas Graf static int ip_tun_build_state(struct net_device *dev, struct nlattr *attr, 233127eb7cdSTom Herbert unsigned int family, const void *cfg, 2343093fbe7SThomas Graf struct lwtunnel_state **ts) 2353093fbe7SThomas Graf { 2363093fbe7SThomas Graf struct ip_tunnel_info *tun_info; 2373093fbe7SThomas Graf struct lwtunnel_state *new_state; 238a1c234f9SJiri Benc struct nlattr *tb[LWTUNNEL_IP_MAX + 1]; 2393093fbe7SThomas Graf int err; 2403093fbe7SThomas Graf 241a1c234f9SJiri Benc err = nla_parse_nested(tb, LWTUNNEL_IP_MAX, attr, ip_tun_policy); 2423093fbe7SThomas Graf if (err < 0) 2433093fbe7SThomas Graf return err; 2443093fbe7SThomas Graf 2453093fbe7SThomas Graf new_state = lwtunnel_state_alloc(sizeof(*tun_info)); 2463093fbe7SThomas Graf if (!new_state) 2473093fbe7SThomas Graf return -ENOMEM; 2483093fbe7SThomas Graf 2493093fbe7SThomas Graf new_state->type = LWTUNNEL_ENCAP_IP; 2503093fbe7SThomas Graf 2513093fbe7SThomas Graf tun_info = lwt_tun_info(new_state); 2523093fbe7SThomas Graf 253a1c234f9SJiri Benc if (tb[LWTUNNEL_IP_ID]) 254a1c234f9SJiri Benc tun_info->key.tun_id = nla_get_u64(tb[LWTUNNEL_IP_ID]); 2553093fbe7SThomas Graf 256a1c234f9SJiri Benc if (tb[LWTUNNEL_IP_DST]) 257c1ea5d67SJiri Benc tun_info->key.u.ipv4.dst = nla_get_be32(tb[LWTUNNEL_IP_DST]); 2583093fbe7SThomas Graf 259a1c234f9SJiri Benc if (tb[LWTUNNEL_IP_SRC]) 260c1ea5d67SJiri Benc tun_info->key.u.ipv4.src = nla_get_be32(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]) 269a1c234f9SJiri Benc tun_info->key.tun_flags = nla_get_u16(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 2793093fbe7SThomas Graf static int ip_tun_fill_encap_info(struct sk_buff *skb, 2803093fbe7SThomas Graf struct lwtunnel_state *lwtstate) 2813093fbe7SThomas Graf { 2823093fbe7SThomas Graf struct ip_tunnel_info *tun_info = lwt_tun_info(lwtstate); 2833093fbe7SThomas Graf 284a1c234f9SJiri Benc if (nla_put_u64(skb, LWTUNNEL_IP_ID, tun_info->key.tun_id) || 285c1ea5d67SJiri Benc nla_put_be32(skb, LWTUNNEL_IP_DST, tun_info->key.u.ipv4.dst) || 286c1ea5d67SJiri Benc nla_put_be32(skb, LWTUNNEL_IP_SRC, tun_info->key.u.ipv4.src) || 2877c383fb2SJiri Benc nla_put_u8(skb, LWTUNNEL_IP_TOS, tun_info->key.tos) || 2887c383fb2SJiri Benc nla_put_u8(skb, LWTUNNEL_IP_TTL, tun_info->key.ttl) || 289a1c234f9SJiri Benc nla_put_u16(skb, LWTUNNEL_IP_FLAGS, tun_info->key.tun_flags)) 2903093fbe7SThomas Graf return -ENOMEM; 2913093fbe7SThomas Graf 2923093fbe7SThomas Graf return 0; 2933093fbe7SThomas Graf } 2943093fbe7SThomas Graf 2953093fbe7SThomas Graf static int ip_tun_encap_nlsize(struct lwtunnel_state *lwtstate) 2963093fbe7SThomas Graf { 297a1c234f9SJiri Benc return nla_total_size(8) /* LWTUNNEL_IP_ID */ 298a1c234f9SJiri Benc + nla_total_size(4) /* LWTUNNEL_IP_DST */ 299a1c234f9SJiri Benc + nla_total_size(4) /* LWTUNNEL_IP_SRC */ 300a1c234f9SJiri Benc + nla_total_size(1) /* LWTUNNEL_IP_TOS */ 301a1c234f9SJiri Benc + nla_total_size(1) /* LWTUNNEL_IP_TTL */ 302a1c234f9SJiri Benc + nla_total_size(2); /* LWTUNNEL_IP_FLAGS */ 3033093fbe7SThomas Graf } 3043093fbe7SThomas Graf 3052d798499SJiri Benc static int ip_tun_cmp_encap(struct lwtunnel_state *a, struct lwtunnel_state *b) 3062d798499SJiri Benc { 3072d798499SJiri Benc return memcmp(lwt_tun_info(a), lwt_tun_info(b), 3082d798499SJiri Benc sizeof(struct ip_tunnel_info)); 3092d798499SJiri Benc } 3102d798499SJiri Benc 3113093fbe7SThomas Graf static const struct lwtunnel_encap_ops ip_tun_lwt_ops = { 3123093fbe7SThomas Graf .build_state = ip_tun_build_state, 3133093fbe7SThomas Graf .fill_encap = ip_tun_fill_encap_info, 3143093fbe7SThomas Graf .get_encap_size = ip_tun_encap_nlsize, 3152d798499SJiri Benc .cmp_encap = ip_tun_cmp_encap, 3163093fbe7SThomas Graf }; 3173093fbe7SThomas Graf 31832a2b002SJiri Benc static const struct nla_policy ip6_tun_policy[LWTUNNEL_IP6_MAX + 1] = { 31932a2b002SJiri Benc [LWTUNNEL_IP6_ID] = { .type = NLA_U64 }, 32032a2b002SJiri Benc [LWTUNNEL_IP6_DST] = { .len = sizeof(struct in6_addr) }, 32132a2b002SJiri Benc [LWTUNNEL_IP6_SRC] = { .len = sizeof(struct in6_addr) }, 32232a2b002SJiri Benc [LWTUNNEL_IP6_HOPLIMIT] = { .type = NLA_U8 }, 32332a2b002SJiri Benc [LWTUNNEL_IP6_TC] = { .type = NLA_U8 }, 32432a2b002SJiri Benc [LWTUNNEL_IP6_FLAGS] = { .type = NLA_U16 }, 32532a2b002SJiri Benc }; 32632a2b002SJiri Benc 32732a2b002SJiri Benc static int ip6_tun_build_state(struct net_device *dev, struct nlattr *attr, 328127eb7cdSTom Herbert unsigned int family, const void *cfg, 32932a2b002SJiri Benc struct lwtunnel_state **ts) 33032a2b002SJiri Benc { 33132a2b002SJiri Benc struct ip_tunnel_info *tun_info; 33232a2b002SJiri Benc struct lwtunnel_state *new_state; 33332a2b002SJiri Benc struct nlattr *tb[LWTUNNEL_IP6_MAX + 1]; 33432a2b002SJiri Benc int err; 33532a2b002SJiri Benc 33632a2b002SJiri Benc err = nla_parse_nested(tb, LWTUNNEL_IP6_MAX, attr, ip6_tun_policy); 33732a2b002SJiri Benc if (err < 0) 33832a2b002SJiri Benc return err; 33932a2b002SJiri Benc 34032a2b002SJiri Benc new_state = lwtunnel_state_alloc(sizeof(*tun_info)); 34132a2b002SJiri Benc if (!new_state) 34232a2b002SJiri Benc return -ENOMEM; 34332a2b002SJiri Benc 34432a2b002SJiri Benc new_state->type = LWTUNNEL_ENCAP_IP6; 34532a2b002SJiri Benc 34632a2b002SJiri Benc tun_info = lwt_tun_info(new_state); 34732a2b002SJiri Benc 34832a2b002SJiri Benc if (tb[LWTUNNEL_IP6_ID]) 34932a2b002SJiri Benc tun_info->key.tun_id = nla_get_u64(tb[LWTUNNEL_IP6_ID]); 35032a2b002SJiri Benc 35132a2b002SJiri Benc if (tb[LWTUNNEL_IP6_DST]) 35232a2b002SJiri Benc tun_info->key.u.ipv6.dst = nla_get_in6_addr(tb[LWTUNNEL_IP6_DST]); 35332a2b002SJiri Benc 35432a2b002SJiri Benc if (tb[LWTUNNEL_IP6_SRC]) 35532a2b002SJiri Benc tun_info->key.u.ipv6.src = nla_get_in6_addr(tb[LWTUNNEL_IP6_SRC]); 35632a2b002SJiri Benc 35732a2b002SJiri Benc if (tb[LWTUNNEL_IP6_HOPLIMIT]) 35832a2b002SJiri Benc tun_info->key.ttl = nla_get_u8(tb[LWTUNNEL_IP6_HOPLIMIT]); 35932a2b002SJiri Benc 36032a2b002SJiri Benc if (tb[LWTUNNEL_IP6_TC]) 36132a2b002SJiri Benc tun_info->key.tos = nla_get_u8(tb[LWTUNNEL_IP6_TC]); 36232a2b002SJiri Benc 36332a2b002SJiri Benc if (tb[LWTUNNEL_IP6_FLAGS]) 36432a2b002SJiri Benc tun_info->key.tun_flags = nla_get_u16(tb[LWTUNNEL_IP6_FLAGS]); 36532a2b002SJiri Benc 3667f9562a1SJiri Benc tun_info->mode = IP_TUNNEL_INFO_TX | IP_TUNNEL_INFO_IPV6; 36732a2b002SJiri Benc tun_info->options_len = 0; 36832a2b002SJiri Benc 36932a2b002SJiri Benc *ts = new_state; 37032a2b002SJiri Benc 37132a2b002SJiri Benc return 0; 37232a2b002SJiri Benc } 37332a2b002SJiri Benc 37432a2b002SJiri Benc static int ip6_tun_fill_encap_info(struct sk_buff *skb, 37532a2b002SJiri Benc struct lwtunnel_state *lwtstate) 37632a2b002SJiri Benc { 37732a2b002SJiri Benc struct ip_tunnel_info *tun_info = lwt_tun_info(lwtstate); 37832a2b002SJiri Benc 37932a2b002SJiri Benc if (nla_put_u64(skb, LWTUNNEL_IP6_ID, tun_info->key.tun_id) || 38032a2b002SJiri Benc nla_put_in6_addr(skb, LWTUNNEL_IP6_DST, &tun_info->key.u.ipv6.dst) || 38132a2b002SJiri Benc nla_put_in6_addr(skb, LWTUNNEL_IP6_SRC, &tun_info->key.u.ipv6.src) || 38232a2b002SJiri Benc nla_put_u8(skb, LWTUNNEL_IP6_HOPLIMIT, tun_info->key.tos) || 38332a2b002SJiri Benc nla_put_u8(skb, LWTUNNEL_IP6_TC, tun_info->key.ttl) || 38432a2b002SJiri Benc nla_put_u16(skb, LWTUNNEL_IP6_FLAGS, tun_info->key.tun_flags)) 38532a2b002SJiri Benc return -ENOMEM; 38632a2b002SJiri Benc 38732a2b002SJiri Benc return 0; 38832a2b002SJiri Benc } 38932a2b002SJiri Benc 39032a2b002SJiri Benc static int ip6_tun_encap_nlsize(struct lwtunnel_state *lwtstate) 39132a2b002SJiri Benc { 39232a2b002SJiri Benc return nla_total_size(8) /* LWTUNNEL_IP6_ID */ 39332a2b002SJiri Benc + nla_total_size(16) /* LWTUNNEL_IP6_DST */ 39432a2b002SJiri Benc + nla_total_size(16) /* LWTUNNEL_IP6_SRC */ 39532a2b002SJiri Benc + nla_total_size(1) /* LWTUNNEL_IP6_HOPLIMIT */ 39632a2b002SJiri Benc + nla_total_size(1) /* LWTUNNEL_IP6_TC */ 39732a2b002SJiri Benc + nla_total_size(2); /* LWTUNNEL_IP6_FLAGS */ 39832a2b002SJiri Benc } 39932a2b002SJiri Benc 40032a2b002SJiri Benc static const struct lwtunnel_encap_ops ip6_tun_lwt_ops = { 40132a2b002SJiri Benc .build_state = ip6_tun_build_state, 40232a2b002SJiri Benc .fill_encap = ip6_tun_fill_encap_info, 40332a2b002SJiri Benc .get_encap_size = ip6_tun_encap_nlsize, 40432a2b002SJiri Benc .cmp_encap = ip_tun_cmp_encap, 40532a2b002SJiri Benc }; 40632a2b002SJiri Benc 407045a0fa0SThomas Graf void __init ip_tunnel_core_init(void) 4083093fbe7SThomas Graf { 4093093fbe7SThomas Graf lwtunnel_encap_add_ops(&ip_tun_lwt_ops, LWTUNNEL_ENCAP_IP); 41032a2b002SJiri Benc lwtunnel_encap_add_ops(&ip6_tun_lwt_ops, LWTUNNEL_ENCAP_IP6); 4113093fbe7SThomas Graf } 412e7030878SThomas Graf 413e7030878SThomas Graf struct static_key ip_tunnel_metadata_cnt = STATIC_KEY_INIT_FALSE; 414e7030878SThomas Graf EXPORT_SYMBOL(ip_tunnel_metadata_cnt); 415e7030878SThomas Graf 416e7030878SThomas Graf void ip_tunnel_need_metadata(void) 417e7030878SThomas Graf { 418e7030878SThomas Graf static_key_slow_inc(&ip_tunnel_metadata_cnt); 419e7030878SThomas Graf } 420e7030878SThomas Graf EXPORT_SYMBOL_GPL(ip_tunnel_need_metadata); 421e7030878SThomas Graf 422e7030878SThomas Graf void ip_tunnel_unneed_metadata(void) 423e7030878SThomas Graf { 424e7030878SThomas Graf static_key_slow_dec(&ip_tunnel_metadata_cnt); 425e7030878SThomas Graf } 426e7030878SThomas Graf EXPORT_SYMBOL_GPL(ip_tunnel_unneed_metadata); 427