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/init.h> 280e6fbc5bSPravin B Shelar #include <linux/in6.h> 290e6fbc5bSPravin B Shelar #include <linux/inetdevice.h> 300e6fbc5bSPravin B Shelar #include <linux/netfilter_ipv4.h> 310e6fbc5bSPravin B Shelar #include <linux/etherdevice.h> 320e6fbc5bSPravin B Shelar #include <linux/if_ether.h> 330e6fbc5bSPravin B Shelar #include <linux/if_vlan.h> 34e7030878SThomas Graf #include <linux/static_key.h> 350e6fbc5bSPravin B Shelar 360e6fbc5bSPravin B Shelar #include <net/ip.h> 370e6fbc5bSPravin B Shelar #include <net/icmp.h> 380e6fbc5bSPravin B Shelar #include <net/protocol.h> 390e6fbc5bSPravin B Shelar #include <net/ip_tunnels.h> 40058214a4STom Herbert #include <net/ip6_tunnel.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 5155c2bc14STom Herbert const struct ip_tunnel_encap_ops __rcu * 5255c2bc14STom Herbert iptun_encaps[MAX_IPTUN_ENCAP_OPS] __read_mostly; 5355c2bc14STom Herbert EXPORT_SYMBOL(iptun_encaps); 5455c2bc14STom Herbert 55058214a4STom Herbert const struct ip6_tnl_encap_ops __rcu * 56058214a4STom Herbert ip6tun_encaps[MAX_IPTUN_ENCAP_OPS] __read_mostly; 57058214a4STom Herbert EXPORT_SYMBOL(ip6tun_encaps); 58058214a4STom Herbert 59039f5062SPravin B Shelar void iptunnel_xmit(struct sock *sk, struct rtable *rt, struct sk_buff *skb, 600e6fbc5bSPravin B Shelar __be32 src, __be32 dst, __u8 proto, 61963a88b3SNicolas Dichtel __u8 tos, __u8 ttl, __be16 df, bool xnet) 620e6fbc5bSPravin B Shelar { 63bc22a0e2SNicolas Dichtel int pkt_len = skb->len - skb_inner_network_offset(skb); 64f859b0f6SEric W. Biederman struct net *net = dev_net(rt->dst.dev); 65039f5062SPravin B Shelar struct net_device *dev = skb->dev; 66b8247f09SShmulik Ladkani int skb_iif = skb->skb_iif; 670e6fbc5bSPravin B Shelar struct iphdr *iph; 680e6fbc5bSPravin B Shelar int err; 690e6fbc5bSPravin B Shelar 70963a88b3SNicolas Dichtel skb_scrub_packet(skb, xnet); 71963a88b3SNicolas Dichtel 727539fadcSTom Herbert skb_clear_hash(skb); 730e6fbc5bSPravin B Shelar skb_dst_set(skb, &rt->dst); 740e6fbc5bSPravin B Shelar memset(IPCB(skb), 0, sizeof(*IPCB(skb))); 750e6fbc5bSPravin B Shelar 76b8247f09SShmulik Ladkani if (skb_iif && proto == IPPROTO_UDP) { 77b8247f09SShmulik Ladkani /* Arrived from an ingress interface and got udp encapuslated. 78b8247f09SShmulik Ladkani * The encapsulated network segment length may exceed dst mtu. 79b8247f09SShmulik Ladkani * Allow IP Fragmentation of segments. 80b8247f09SShmulik Ladkani */ 81b8247f09SShmulik Ladkani IPCB(skb)->flags |= IPSKB_FRAG_SEGS; 82b8247f09SShmulik Ladkani } 83b8247f09SShmulik Ladkani 840e6fbc5bSPravin B Shelar /* Push down and install the IP header. */ 8578a3694dSSteffen Klassert skb_push(skb, sizeof(struct iphdr)); 860e6fbc5bSPravin B Shelar skb_reset_network_header(skb); 870e6fbc5bSPravin B Shelar 880e6fbc5bSPravin B Shelar iph = ip_hdr(skb); 890e6fbc5bSPravin B Shelar 900e6fbc5bSPravin B Shelar iph->version = 4; 910e6fbc5bSPravin B Shelar iph->ihl = sizeof(struct iphdr) >> 2; 920e6fbc5bSPravin B Shelar iph->frag_off = df; 930e6fbc5bSPravin B Shelar iph->protocol = proto; 940e6fbc5bSPravin B Shelar iph->tos = tos; 950e6fbc5bSPravin B Shelar iph->daddr = dst; 960e6fbc5bSPravin B Shelar iph->saddr = src; 970e6fbc5bSPravin B Shelar iph->ttl = ttl; 98f859b0f6SEric W. Biederman __ip_select_ident(net, iph, skb_shinfo(skb)->gso_segs ?: 1); 990e6fbc5bSPravin B Shelar 10033224b16SEric W. Biederman err = ip_local_out(net, sk, skb); 1010e6fbc5bSPravin B Shelar if (unlikely(net_xmit_eval(err))) 1020e6fbc5bSPravin B Shelar pkt_len = 0; 103039f5062SPravin B Shelar iptunnel_xmit_stats(dev, pkt_len); 1040e6fbc5bSPravin B Shelar } 1050e6fbc5bSPravin B Shelar EXPORT_SYMBOL_GPL(iptunnel_xmit); 1063d7b46cdSPravin B Shelar 107a6d5bbf3SJiri Benc int __iptunnel_pull_header(struct sk_buff *skb, int hdr_len, 108a6d5bbf3SJiri Benc __be16 inner_proto, bool raw_proto, bool xnet) 1093d7b46cdSPravin B Shelar { 1103d7b46cdSPravin B Shelar if (unlikely(!pskb_may_pull(skb, hdr_len))) 1113d7b46cdSPravin B Shelar return -ENOMEM; 1123d7b46cdSPravin B Shelar 1133d7b46cdSPravin B Shelar skb_pull_rcsum(skb, hdr_len); 1143d7b46cdSPravin B Shelar 115a6d5bbf3SJiri Benc if (!raw_proto && inner_proto == htons(ETH_P_TEB)) { 1161245dfc8SLi RongQing struct ethhdr *eh; 1173d7b46cdSPravin B Shelar 1183d7b46cdSPravin B Shelar if (unlikely(!pskb_may_pull(skb, ETH_HLEN))) 1193d7b46cdSPravin B Shelar return -ENOMEM; 1203d7b46cdSPravin B Shelar 1211245dfc8SLi RongQing eh = (struct ethhdr *)skb->data; 122d181ddcaSAlexander Duyck if (likely(eth_proto_is_802_3(eh->h_proto))) 1233d7b46cdSPravin B Shelar skb->protocol = eh->h_proto; 1243d7b46cdSPravin B Shelar else 1253d7b46cdSPravin B Shelar skb->protocol = htons(ETH_P_802_2); 1263d7b46cdSPravin B Shelar 1273d7b46cdSPravin B Shelar } else { 1283d7b46cdSPravin B Shelar skb->protocol = inner_proto; 1293d7b46cdSPravin B Shelar } 1303d7b46cdSPravin B Shelar 1317539fadcSTom Herbert skb_clear_hash_if_not_l4(skb); 1323d7b46cdSPravin B Shelar skb->vlan_tci = 0; 1333d7b46cdSPravin B Shelar skb_set_queue_mapping(skb, 0); 1347f290c94SJiri Benc skb_scrub_packet(skb, xnet); 135a09a4c8dSJesse Gross 136a09a4c8dSJesse Gross return iptunnel_pull_offloads(skb); 1373d7b46cdSPravin B Shelar } 138a6d5bbf3SJiri Benc EXPORT_SYMBOL_GPL(__iptunnel_pull_header); 1392d26f0a3SEric Dumazet 14063d008a4SJiri Benc struct metadata_dst *iptunnel_metadata_reply(struct metadata_dst *md, 14163d008a4SJiri Benc gfp_t flags) 14263d008a4SJiri Benc { 14363d008a4SJiri Benc struct metadata_dst *res; 14463d008a4SJiri Benc struct ip_tunnel_info *dst, *src; 14563d008a4SJiri Benc 14663d008a4SJiri Benc if (!md || md->u.tun_info.mode & IP_TUNNEL_INFO_TX) 14763d008a4SJiri Benc return NULL; 14863d008a4SJiri Benc 14963d008a4SJiri Benc res = metadata_dst_alloc(0, flags); 15063d008a4SJiri Benc if (!res) 15163d008a4SJiri Benc return NULL; 15263d008a4SJiri Benc 15363d008a4SJiri Benc dst = &res->u.tun_info; 15463d008a4SJiri Benc src = &md->u.tun_info; 15563d008a4SJiri Benc dst->key.tun_id = src->key.tun_id; 15663d008a4SJiri Benc if (src->mode & IP_TUNNEL_INFO_IPV6) 15763d008a4SJiri Benc memcpy(&dst->key.u.ipv6.dst, &src->key.u.ipv6.src, 15863d008a4SJiri Benc sizeof(struct in6_addr)); 15963d008a4SJiri Benc else 16063d008a4SJiri Benc dst->key.u.ipv4.dst = src->key.u.ipv4.src; 16163d008a4SJiri Benc dst->mode = src->mode | IP_TUNNEL_INFO_TX; 16263d008a4SJiri Benc 16363d008a4SJiri Benc return res; 16463d008a4SJiri Benc } 16563d008a4SJiri Benc EXPORT_SYMBOL_GPL(iptunnel_metadata_reply); 16663d008a4SJiri Benc 167aed069dfSAlexander Duyck int iptunnel_handle_offloads(struct sk_buff *skb, 1682d26f0a3SEric Dumazet int gso_type_mask) 1692d26f0a3SEric Dumazet { 1702d26f0a3SEric Dumazet int err; 1712d26f0a3SEric Dumazet 1722d26f0a3SEric Dumazet if (likely(!skb->encapsulation)) { 1732d26f0a3SEric Dumazet skb_reset_inner_headers(skb); 1742d26f0a3SEric Dumazet skb->encapsulation = 1; 1752d26f0a3SEric Dumazet } 1762d26f0a3SEric Dumazet 1772d26f0a3SEric Dumazet if (skb_is_gso(skb)) { 1789580bf2eSEric Dumazet err = skb_header_unclone(skb, GFP_ATOMIC); 1792d26f0a3SEric Dumazet if (unlikely(err)) 180aed069dfSAlexander Duyck return err; 1812d26f0a3SEric Dumazet skb_shinfo(skb)->gso_type |= gso_type_mask; 182aed069dfSAlexander Duyck return 0; 1832d26f0a3SEric Dumazet } 1842d26f0a3SEric Dumazet 1856fa79666SEdward Cree if (skb->ip_summed != CHECKSUM_PARTIAL) { 1862d26f0a3SEric Dumazet skb->ip_summed = CHECKSUM_NONE; 1876fa79666SEdward Cree /* We clear encapsulation here to prevent badly-written 1886fa79666SEdward Cree * drivers potentially deciding to offload an inner checksum 1896fa79666SEdward Cree * if we set CHECKSUM_PARTIAL on the outer header. 1906fa79666SEdward Cree * This should go away when the drivers are all fixed. 1916fa79666SEdward Cree */ 192179bc67fSEdward Cree skb->encapsulation = 0; 193179bc67fSEdward Cree } 1942d26f0a3SEric Dumazet 195aed069dfSAlexander Duyck return 0; 1962d26f0a3SEric Dumazet } 1972d26f0a3SEric Dumazet EXPORT_SYMBOL_GPL(iptunnel_handle_offloads); 198ebe44f35SDavid S. Miller 199ebe44f35SDavid S. Miller /* Often modified stats are per cpu, other are shared (netdev->stats) */ 200ebe44f35SDavid S. Miller struct rtnl_link_stats64 *ip_tunnel_get_stats64(struct net_device *dev, 201ebe44f35SDavid S. Miller struct rtnl_link_stats64 *tot) 202ebe44f35SDavid S. Miller { 203ebe44f35SDavid S. Miller int i; 204ebe44f35SDavid S. Miller 205c24a5964SAlexander Duyck netdev_stats_to_stats64(tot, &dev->stats); 206c24a5964SAlexander Duyck 207ebe44f35SDavid S. Miller for_each_possible_cpu(i) { 208ebe44f35SDavid S. Miller const struct pcpu_sw_netstats *tstats = 209ebe44f35SDavid S. Miller per_cpu_ptr(dev->tstats, i); 210ebe44f35SDavid S. Miller u64 rx_packets, rx_bytes, tx_packets, tx_bytes; 211ebe44f35SDavid S. Miller unsigned int start; 212ebe44f35SDavid S. Miller 213ebe44f35SDavid S. Miller do { 21457a7744eSEric W. Biederman start = u64_stats_fetch_begin_irq(&tstats->syncp); 215ebe44f35SDavid S. Miller rx_packets = tstats->rx_packets; 216ebe44f35SDavid S. Miller tx_packets = tstats->tx_packets; 217ebe44f35SDavid S. Miller rx_bytes = tstats->rx_bytes; 218ebe44f35SDavid S. Miller tx_bytes = tstats->tx_bytes; 21957a7744eSEric W. Biederman } while (u64_stats_fetch_retry_irq(&tstats->syncp, start)); 220ebe44f35SDavid S. Miller 221ebe44f35SDavid S. Miller tot->rx_packets += rx_packets; 222ebe44f35SDavid S. Miller tot->tx_packets += tx_packets; 223ebe44f35SDavid S. Miller tot->rx_bytes += rx_bytes; 224ebe44f35SDavid S. Miller tot->tx_bytes += tx_bytes; 225ebe44f35SDavid S. Miller } 226ebe44f35SDavid S. Miller 227ebe44f35SDavid S. Miller return tot; 228ebe44f35SDavid S. Miller } 229ebe44f35SDavid S. Miller EXPORT_SYMBOL_GPL(ip_tunnel_get_stats64); 2303093fbe7SThomas Graf 231a1c234f9SJiri Benc static const struct nla_policy ip_tun_policy[LWTUNNEL_IP_MAX + 1] = { 232a1c234f9SJiri Benc [LWTUNNEL_IP_ID] = { .type = NLA_U64 }, 233a1c234f9SJiri Benc [LWTUNNEL_IP_DST] = { .type = NLA_U32 }, 234a1c234f9SJiri Benc [LWTUNNEL_IP_SRC] = { .type = NLA_U32 }, 235a1c234f9SJiri Benc [LWTUNNEL_IP_TTL] = { .type = NLA_U8 }, 236a1c234f9SJiri Benc [LWTUNNEL_IP_TOS] = { .type = NLA_U8 }, 237a1c234f9SJiri Benc [LWTUNNEL_IP_FLAGS] = { .type = NLA_U16 }, 2383093fbe7SThomas Graf }; 2393093fbe7SThomas Graf 2403093fbe7SThomas Graf static int ip_tun_build_state(struct net_device *dev, struct nlattr *attr, 241127eb7cdSTom Herbert unsigned int family, const void *cfg, 2423093fbe7SThomas Graf struct lwtunnel_state **ts) 2433093fbe7SThomas Graf { 2443093fbe7SThomas Graf struct ip_tunnel_info *tun_info; 2453093fbe7SThomas Graf struct lwtunnel_state *new_state; 246a1c234f9SJiri Benc struct nlattr *tb[LWTUNNEL_IP_MAX + 1]; 2473093fbe7SThomas Graf int err; 2483093fbe7SThomas Graf 249a1c234f9SJiri Benc err = nla_parse_nested(tb, LWTUNNEL_IP_MAX, attr, ip_tun_policy); 2503093fbe7SThomas Graf if (err < 0) 2513093fbe7SThomas Graf return err; 2523093fbe7SThomas Graf 2533093fbe7SThomas Graf new_state = lwtunnel_state_alloc(sizeof(*tun_info)); 2543093fbe7SThomas Graf if (!new_state) 2553093fbe7SThomas Graf return -ENOMEM; 2563093fbe7SThomas Graf 2573093fbe7SThomas Graf new_state->type = LWTUNNEL_ENCAP_IP; 2583093fbe7SThomas Graf 2593093fbe7SThomas Graf tun_info = lwt_tun_info(new_state); 2603093fbe7SThomas Graf 261a1c234f9SJiri Benc if (tb[LWTUNNEL_IP_ID]) 26230d3d83aSLance Richardson tun_info->key.tun_id = nla_get_be64(tb[LWTUNNEL_IP_ID]); 2633093fbe7SThomas Graf 264a1c234f9SJiri Benc if (tb[LWTUNNEL_IP_DST]) 2657822ce73SHaishuang Yan tun_info->key.u.ipv4.dst = nla_get_in_addr(tb[LWTUNNEL_IP_DST]); 2663093fbe7SThomas Graf 267a1c234f9SJiri Benc if (tb[LWTUNNEL_IP_SRC]) 2687822ce73SHaishuang Yan tun_info->key.u.ipv4.src = nla_get_in_addr(tb[LWTUNNEL_IP_SRC]); 2693093fbe7SThomas Graf 270a1c234f9SJiri Benc if (tb[LWTUNNEL_IP_TTL]) 2717c383fb2SJiri Benc tun_info->key.ttl = nla_get_u8(tb[LWTUNNEL_IP_TTL]); 2723093fbe7SThomas Graf 273a1c234f9SJiri Benc if (tb[LWTUNNEL_IP_TOS]) 2747c383fb2SJiri Benc tun_info->key.tos = nla_get_u8(tb[LWTUNNEL_IP_TOS]); 2753093fbe7SThomas Graf 276a1c234f9SJiri Benc if (tb[LWTUNNEL_IP_FLAGS]) 27730d3d83aSLance Richardson tun_info->key.tun_flags = nla_get_be16(tb[LWTUNNEL_IP_FLAGS]); 2783093fbe7SThomas Graf 2793093fbe7SThomas Graf tun_info->mode = IP_TUNNEL_INFO_TX; 2803093fbe7SThomas Graf tun_info->options_len = 0; 2813093fbe7SThomas Graf 2823093fbe7SThomas Graf *ts = new_state; 2833093fbe7SThomas Graf 2843093fbe7SThomas Graf return 0; 2853093fbe7SThomas Graf } 2863093fbe7SThomas Graf 2873093fbe7SThomas Graf static int ip_tun_fill_encap_info(struct sk_buff *skb, 2883093fbe7SThomas Graf struct lwtunnel_state *lwtstate) 2893093fbe7SThomas Graf { 2903093fbe7SThomas Graf struct ip_tunnel_info *tun_info = lwt_tun_info(lwtstate); 2913093fbe7SThomas Graf 292b46f6dedSNicolas Dichtel if (nla_put_be64(skb, LWTUNNEL_IP_ID, tun_info->key.tun_id, 293b46f6dedSNicolas Dichtel LWTUNNEL_IP_PAD) || 2947822ce73SHaishuang Yan nla_put_in_addr(skb, LWTUNNEL_IP_DST, tun_info->key.u.ipv4.dst) || 2957822ce73SHaishuang Yan nla_put_in_addr(skb, LWTUNNEL_IP_SRC, tun_info->key.u.ipv4.src) || 2967c383fb2SJiri Benc nla_put_u8(skb, LWTUNNEL_IP_TOS, tun_info->key.tos) || 2977c383fb2SJiri Benc nla_put_u8(skb, LWTUNNEL_IP_TTL, tun_info->key.ttl) || 29830d3d83aSLance Richardson nla_put_be16(skb, LWTUNNEL_IP_FLAGS, tun_info->key.tun_flags)) 2993093fbe7SThomas Graf return -ENOMEM; 3003093fbe7SThomas Graf 3013093fbe7SThomas Graf return 0; 3023093fbe7SThomas Graf } 3033093fbe7SThomas Graf 3043093fbe7SThomas Graf static int ip_tun_encap_nlsize(struct lwtunnel_state *lwtstate) 3053093fbe7SThomas Graf { 306b46f6dedSNicolas Dichtel return nla_total_size_64bit(8) /* LWTUNNEL_IP_ID */ 307a1c234f9SJiri Benc + nla_total_size(4) /* LWTUNNEL_IP_DST */ 308a1c234f9SJiri Benc + nla_total_size(4) /* LWTUNNEL_IP_SRC */ 309a1c234f9SJiri Benc + nla_total_size(1) /* LWTUNNEL_IP_TOS */ 310a1c234f9SJiri Benc + nla_total_size(1) /* LWTUNNEL_IP_TTL */ 311a1c234f9SJiri Benc + nla_total_size(2); /* LWTUNNEL_IP_FLAGS */ 3123093fbe7SThomas Graf } 3133093fbe7SThomas Graf 3142d798499SJiri Benc static int ip_tun_cmp_encap(struct lwtunnel_state *a, struct lwtunnel_state *b) 3152d798499SJiri Benc { 3162d798499SJiri Benc return memcmp(lwt_tun_info(a), lwt_tun_info(b), 3172d798499SJiri Benc sizeof(struct ip_tunnel_info)); 3182d798499SJiri Benc } 3192d798499SJiri Benc 3203093fbe7SThomas Graf static const struct lwtunnel_encap_ops ip_tun_lwt_ops = { 3213093fbe7SThomas Graf .build_state = ip_tun_build_state, 3223093fbe7SThomas Graf .fill_encap = ip_tun_fill_encap_info, 3233093fbe7SThomas Graf .get_encap_size = ip_tun_encap_nlsize, 3242d798499SJiri Benc .cmp_encap = ip_tun_cmp_encap, 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 33632a2b002SJiri Benc static int ip6_tun_build_state(struct net_device *dev, struct nlattr *attr, 337127eb7cdSTom Herbert unsigned int family, const void *cfg, 33832a2b002SJiri Benc struct lwtunnel_state **ts) 33932a2b002SJiri Benc { 34032a2b002SJiri Benc struct ip_tunnel_info *tun_info; 34132a2b002SJiri Benc struct lwtunnel_state *new_state; 34232a2b002SJiri Benc struct nlattr *tb[LWTUNNEL_IP6_MAX + 1]; 34332a2b002SJiri Benc int err; 34432a2b002SJiri Benc 34532a2b002SJiri Benc err = nla_parse_nested(tb, LWTUNNEL_IP6_MAX, attr, ip6_tun_policy); 34632a2b002SJiri Benc if (err < 0) 34732a2b002SJiri Benc return err; 34832a2b002SJiri Benc 34932a2b002SJiri Benc new_state = lwtunnel_state_alloc(sizeof(*tun_info)); 35032a2b002SJiri Benc if (!new_state) 35132a2b002SJiri Benc return -ENOMEM; 35232a2b002SJiri Benc 35332a2b002SJiri Benc new_state->type = LWTUNNEL_ENCAP_IP6; 35432a2b002SJiri Benc 35532a2b002SJiri Benc tun_info = lwt_tun_info(new_state); 35632a2b002SJiri Benc 35732a2b002SJiri Benc if (tb[LWTUNNEL_IP6_ID]) 35830d3d83aSLance Richardson tun_info->key.tun_id = nla_get_be64(tb[LWTUNNEL_IP6_ID]); 35932a2b002SJiri Benc 36032a2b002SJiri Benc if (tb[LWTUNNEL_IP6_DST]) 36132a2b002SJiri Benc tun_info->key.u.ipv6.dst = nla_get_in6_addr(tb[LWTUNNEL_IP6_DST]); 36232a2b002SJiri Benc 36332a2b002SJiri Benc if (tb[LWTUNNEL_IP6_SRC]) 36432a2b002SJiri Benc tun_info->key.u.ipv6.src = nla_get_in6_addr(tb[LWTUNNEL_IP6_SRC]); 36532a2b002SJiri Benc 36632a2b002SJiri Benc if (tb[LWTUNNEL_IP6_HOPLIMIT]) 36732a2b002SJiri Benc tun_info->key.ttl = nla_get_u8(tb[LWTUNNEL_IP6_HOPLIMIT]); 36832a2b002SJiri Benc 36932a2b002SJiri Benc if (tb[LWTUNNEL_IP6_TC]) 37032a2b002SJiri Benc tun_info->key.tos = nla_get_u8(tb[LWTUNNEL_IP6_TC]); 37132a2b002SJiri Benc 37232a2b002SJiri Benc if (tb[LWTUNNEL_IP6_FLAGS]) 37330d3d83aSLance Richardson tun_info->key.tun_flags = nla_get_be16(tb[LWTUNNEL_IP6_FLAGS]); 37432a2b002SJiri Benc 3757f9562a1SJiri Benc tun_info->mode = IP_TUNNEL_INFO_TX | IP_TUNNEL_INFO_IPV6; 37632a2b002SJiri Benc tun_info->options_len = 0; 37732a2b002SJiri Benc 37832a2b002SJiri Benc *ts = new_state; 37932a2b002SJiri Benc 38032a2b002SJiri Benc return 0; 38132a2b002SJiri Benc } 38232a2b002SJiri Benc 38332a2b002SJiri Benc static int ip6_tun_fill_encap_info(struct sk_buff *skb, 38432a2b002SJiri Benc struct lwtunnel_state *lwtstate) 38532a2b002SJiri Benc { 38632a2b002SJiri Benc struct ip_tunnel_info *tun_info = lwt_tun_info(lwtstate); 38732a2b002SJiri Benc 388b46f6dedSNicolas Dichtel if (nla_put_be64(skb, LWTUNNEL_IP6_ID, tun_info->key.tun_id, 389b46f6dedSNicolas Dichtel LWTUNNEL_IP6_PAD) || 39032a2b002SJiri Benc nla_put_in6_addr(skb, LWTUNNEL_IP6_DST, &tun_info->key.u.ipv6.dst) || 39132a2b002SJiri Benc nla_put_in6_addr(skb, LWTUNNEL_IP6_SRC, &tun_info->key.u.ipv6.src) || 392995096a0SQuentin Armitage nla_put_u8(skb, LWTUNNEL_IP6_TC, tun_info->key.tos) || 393995096a0SQuentin Armitage nla_put_u8(skb, LWTUNNEL_IP6_HOPLIMIT, tun_info->key.ttl) || 39430d3d83aSLance Richardson nla_put_be16(skb, LWTUNNEL_IP6_FLAGS, tun_info->key.tun_flags)) 39532a2b002SJiri Benc return -ENOMEM; 39632a2b002SJiri Benc 39732a2b002SJiri Benc return 0; 39832a2b002SJiri Benc } 39932a2b002SJiri Benc 40032a2b002SJiri Benc static int ip6_tun_encap_nlsize(struct lwtunnel_state *lwtstate) 40132a2b002SJiri Benc { 402b46f6dedSNicolas Dichtel return nla_total_size_64bit(8) /* LWTUNNEL_IP6_ID */ 40332a2b002SJiri Benc + nla_total_size(16) /* LWTUNNEL_IP6_DST */ 40432a2b002SJiri Benc + nla_total_size(16) /* LWTUNNEL_IP6_SRC */ 40532a2b002SJiri Benc + nla_total_size(1) /* LWTUNNEL_IP6_HOPLIMIT */ 40632a2b002SJiri Benc + nla_total_size(1) /* LWTUNNEL_IP6_TC */ 40732a2b002SJiri Benc + nla_total_size(2); /* LWTUNNEL_IP6_FLAGS */ 40832a2b002SJiri Benc } 40932a2b002SJiri Benc 41032a2b002SJiri Benc static const struct lwtunnel_encap_ops ip6_tun_lwt_ops = { 41132a2b002SJiri Benc .build_state = ip6_tun_build_state, 41232a2b002SJiri Benc .fill_encap = ip6_tun_fill_encap_info, 41332a2b002SJiri Benc .get_encap_size = ip6_tun_encap_nlsize, 41432a2b002SJiri Benc .cmp_encap = ip_tun_cmp_encap, 41532a2b002SJiri Benc }; 41632a2b002SJiri Benc 417045a0fa0SThomas Graf void __init ip_tunnel_core_init(void) 4183093fbe7SThomas Graf { 419fca5fdf6SDaniel Borkmann /* If you land here, make sure whether increasing ip_tunnel_info's 420fca5fdf6SDaniel Borkmann * options_len is a reasonable choice with its usage in front ends 421fca5fdf6SDaniel Borkmann * (f.e., it's part of flow keys, etc). 422fca5fdf6SDaniel Borkmann */ 423fca5fdf6SDaniel Borkmann BUILD_BUG_ON(IP_TUNNEL_OPTS_MAX != 255); 424fca5fdf6SDaniel Borkmann 4253093fbe7SThomas Graf lwtunnel_encap_add_ops(&ip_tun_lwt_ops, LWTUNNEL_ENCAP_IP); 42632a2b002SJiri Benc lwtunnel_encap_add_ops(&ip6_tun_lwt_ops, LWTUNNEL_ENCAP_IP6); 4273093fbe7SThomas Graf } 428e7030878SThomas Graf 429e7030878SThomas Graf struct static_key ip_tunnel_metadata_cnt = STATIC_KEY_INIT_FALSE; 430e7030878SThomas Graf EXPORT_SYMBOL(ip_tunnel_metadata_cnt); 431e7030878SThomas Graf 432e7030878SThomas Graf void ip_tunnel_need_metadata(void) 433e7030878SThomas Graf { 434e7030878SThomas Graf static_key_slow_inc(&ip_tunnel_metadata_cnt); 435e7030878SThomas Graf } 436e7030878SThomas Graf EXPORT_SYMBOL_GPL(ip_tunnel_need_metadata); 437e7030878SThomas Graf 438e7030878SThomas Graf void ip_tunnel_unneed_metadata(void) 439e7030878SThomas Graf { 440e7030878SThomas Graf static_key_slow_dec(&ip_tunnel_metadata_cnt); 441e7030878SThomas Graf } 442e7030878SThomas Graf EXPORT_SYMBOL_GPL(ip_tunnel_unneed_metadata); 443