Pravin B Shelar | 0e6fbc5 | 2013-06-17 17:49:56 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2013 Nicira, Inc. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of version 2 of the GNU General Public |
| 6 | * License as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, but |
| 9 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 11 | * General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License |
| 14 | * along with this program; if not, write to the Free Software |
| 15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 16 | * 02110-1301, USA |
| 17 | */ |
| 18 | |
| 19 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 20 | |
| 21 | #include <linux/types.h> |
| 22 | #include <linux/kernel.h> |
| 23 | #include <linux/skbuff.h> |
| 24 | #include <linux/netdevice.h> |
| 25 | #include <linux/in.h> |
| 26 | #include <linux/if_arp.h> |
Pravin B Shelar | 0e6fbc5 | 2013-06-17 17:49:56 -0700 | [diff] [blame] | 27 | #include <linux/init.h> |
| 28 | #include <linux/in6.h> |
| 29 | #include <linux/inetdevice.h> |
| 30 | #include <linux/netfilter_ipv4.h> |
| 31 | #include <linux/etherdevice.h> |
| 32 | #include <linux/if_ether.h> |
| 33 | #include <linux/if_vlan.h> |
Thomas Graf | e703087 | 2015-07-21 10:44:01 +0200 | [diff] [blame] | 34 | #include <linux/static_key.h> |
Pravin B Shelar | 0e6fbc5 | 2013-06-17 17:49:56 -0700 | [diff] [blame] | 35 | |
| 36 | #include <net/ip.h> |
| 37 | #include <net/icmp.h> |
| 38 | #include <net/protocol.h> |
| 39 | #include <net/ip_tunnels.h> |
Tom Herbert | 058214a | 2016-05-18 09:06:17 -0700 | [diff] [blame] | 40 | #include <net/ip6_tunnel.h> |
Pravin B Shelar | 0e6fbc5 | 2013-06-17 17:49:56 -0700 | [diff] [blame] | 41 | #include <net/arp.h> |
| 42 | #include <net/checksum.h> |
| 43 | #include <net/dsfield.h> |
| 44 | #include <net/inet_ecn.h> |
| 45 | #include <net/xfrm.h> |
| 46 | #include <net/net_namespace.h> |
| 47 | #include <net/netns/generic.h> |
| 48 | #include <net/rtnetlink.h> |
Jiri Benc | 63d008a | 2015-09-22 18:12:11 +0200 | [diff] [blame] | 49 | #include <net/dst_metadata.h> |
Pravin B Shelar | 0e6fbc5 | 2013-06-17 17:49:56 -0700 | [diff] [blame] | 50 | |
Tom Herbert | 55c2bc1 | 2016-05-18 09:06:13 -0700 | [diff] [blame] | 51 | const struct ip_tunnel_encap_ops __rcu * |
| 52 | iptun_encaps[MAX_IPTUN_ENCAP_OPS] __read_mostly; |
| 53 | EXPORT_SYMBOL(iptun_encaps); |
| 54 | |
Tom Herbert | 058214a | 2016-05-18 09:06:17 -0700 | [diff] [blame] | 55 | const struct ip6_tnl_encap_ops __rcu * |
| 56 | ip6tun_encaps[MAX_IPTUN_ENCAP_OPS] __read_mostly; |
| 57 | EXPORT_SYMBOL(ip6tun_encaps); |
| 58 | |
Pravin B Shelar | 039f506 | 2015-12-24 14:34:54 -0800 | [diff] [blame] | 59 | void iptunnel_xmit(struct sock *sk, struct rtable *rt, struct sk_buff *skb, |
| 60 | __be32 src, __be32 dst, __u8 proto, |
| 61 | __u8 tos, __u8 ttl, __be16 df, bool xnet) |
Pravin B Shelar | 0e6fbc5 | 2013-06-17 17:49:56 -0700 | [diff] [blame] | 62 | { |
Nicolas Dichtel | bc22a0e | 2015-09-18 11:47:40 +0200 | [diff] [blame] | 63 | int pkt_len = skb->len - skb_inner_network_offset(skb); |
Eric W. Biederman | f859b0f | 2015-10-07 16:48:41 -0500 | [diff] [blame] | 64 | struct net *net = dev_net(rt->dst.dev); |
Pravin B Shelar | 039f506 | 2015-12-24 14:34:54 -0800 | [diff] [blame] | 65 | struct net_device *dev = skb->dev; |
Shmulik Ladkani | b8247f0 | 2016-07-18 14:49:34 +0300 | [diff] [blame] | 66 | int skb_iif = skb->skb_iif; |
Pravin B Shelar | 0e6fbc5 | 2013-06-17 17:49:56 -0700 | [diff] [blame] | 67 | struct iphdr *iph; |
| 68 | int err; |
| 69 | |
Nicolas Dichtel | 963a88b | 2013-09-02 15:34:57 +0200 | [diff] [blame] | 70 | skb_scrub_packet(skb, xnet); |
| 71 | |
Tom Herbert | 7539fad | 2013-12-15 22:12:18 -0800 | [diff] [blame] | 72 | skb_clear_hash(skb); |
Pravin B Shelar | 0e6fbc5 | 2013-06-17 17:49:56 -0700 | [diff] [blame] | 73 | skb_dst_set(skb, &rt->dst); |
| 74 | memset(IPCB(skb), 0, sizeof(*IPCB(skb))); |
| 75 | |
Shmulik Ladkani | c0451fe | 2016-08-21 11:22:32 +0300 | [diff] [blame] | 76 | if (skb_iif && !(df & htons(IP_DF))) { |
| 77 | /* Arrived from an ingress interface, got encapsulated, with |
| 78 | * fragmentation of encapulating frames allowed. |
| 79 | * If skb is gso, the resulting encapsulated network segments |
| 80 | * may exceed dst mtu. |
Shmulik Ladkani | b8247f0 | 2016-07-18 14:49:34 +0300 | [diff] [blame] | 81 | * Allow IP Fragmentation of segments. |
| 82 | */ |
| 83 | IPCB(skb)->flags |= IPSKB_FRAG_SEGS; |
| 84 | } |
| 85 | |
Pravin B Shelar | 0e6fbc5 | 2013-06-17 17:49:56 -0700 | [diff] [blame] | 86 | /* Push down and install the IP header. */ |
Steffen Klassert | 78a3694 | 2013-10-01 11:35:51 +0200 | [diff] [blame] | 87 | skb_push(skb, sizeof(struct iphdr)); |
Pravin B Shelar | 0e6fbc5 | 2013-06-17 17:49:56 -0700 | [diff] [blame] | 88 | skb_reset_network_header(skb); |
| 89 | |
| 90 | iph = ip_hdr(skb); |
| 91 | |
| 92 | iph->version = 4; |
| 93 | iph->ihl = sizeof(struct iphdr) >> 2; |
| 94 | iph->frag_off = df; |
| 95 | iph->protocol = proto; |
| 96 | iph->tos = tos; |
| 97 | iph->daddr = dst; |
| 98 | iph->saddr = src; |
| 99 | iph->ttl = ttl; |
Eric W. Biederman | f859b0f | 2015-10-07 16:48:41 -0500 | [diff] [blame] | 100 | __ip_select_ident(net, iph, skb_shinfo(skb)->gso_segs ?: 1); |
Pravin B Shelar | 0e6fbc5 | 2013-06-17 17:49:56 -0700 | [diff] [blame] | 101 | |
Eric W. Biederman | 33224b1 | 2015-10-07 16:48:46 -0500 | [diff] [blame] | 102 | err = ip_local_out(net, sk, skb); |
Pravin B Shelar | 0e6fbc5 | 2013-06-17 17:49:56 -0700 | [diff] [blame] | 103 | if (unlikely(net_xmit_eval(err))) |
| 104 | pkt_len = 0; |
Pravin B Shelar | 039f506 | 2015-12-24 14:34:54 -0800 | [diff] [blame] | 105 | iptunnel_xmit_stats(dev, pkt_len); |
Pravin B Shelar | 0e6fbc5 | 2013-06-17 17:49:56 -0700 | [diff] [blame] | 106 | } |
| 107 | EXPORT_SYMBOL_GPL(iptunnel_xmit); |
Pravin B Shelar | 3d7b46c | 2013-06-17 17:50:02 -0700 | [diff] [blame] | 108 | |
Jiri Benc | a6d5bbf | 2016-04-05 14:47:12 +0200 | [diff] [blame] | 109 | int __iptunnel_pull_header(struct sk_buff *skb, int hdr_len, |
| 110 | __be16 inner_proto, bool raw_proto, bool xnet) |
Pravin B Shelar | 3d7b46c | 2013-06-17 17:50:02 -0700 | [diff] [blame] | 111 | { |
| 112 | if (unlikely(!pskb_may_pull(skb, hdr_len))) |
| 113 | return -ENOMEM; |
| 114 | |
| 115 | skb_pull_rcsum(skb, hdr_len); |
| 116 | |
Jiri Benc | a6d5bbf | 2016-04-05 14:47:12 +0200 | [diff] [blame] | 117 | if (!raw_proto && inner_proto == htons(ETH_P_TEB)) { |
Li RongQing | 1245dfc | 2014-10-17 16:53:23 +0800 | [diff] [blame] | 118 | struct ethhdr *eh; |
Pravin B Shelar | 3d7b46c | 2013-06-17 17:50:02 -0700 | [diff] [blame] | 119 | |
| 120 | if (unlikely(!pskb_may_pull(skb, ETH_HLEN))) |
| 121 | return -ENOMEM; |
| 122 | |
Li RongQing | 1245dfc | 2014-10-17 16:53:23 +0800 | [diff] [blame] | 123 | eh = (struct ethhdr *)skb->data; |
Alexander Duyck | d181ddc | 2015-05-04 14:33:59 -0700 | [diff] [blame] | 124 | if (likely(eth_proto_is_802_3(eh->h_proto))) |
Pravin B Shelar | 3d7b46c | 2013-06-17 17:50:02 -0700 | [diff] [blame] | 125 | skb->protocol = eh->h_proto; |
| 126 | else |
| 127 | skb->protocol = htons(ETH_P_802_2); |
| 128 | |
| 129 | } else { |
| 130 | skb->protocol = inner_proto; |
| 131 | } |
| 132 | |
Tom Herbert | 7539fad | 2013-12-15 22:12:18 -0800 | [diff] [blame] | 133 | skb_clear_hash_if_not_l4(skb); |
Pravin B Shelar | 3d7b46c | 2013-06-17 17:50:02 -0700 | [diff] [blame] | 134 | skb->vlan_tci = 0; |
| 135 | skb_set_queue_mapping(skb, 0); |
Jiri Benc | 7f290c9 | 2016-02-18 11:22:52 +0100 | [diff] [blame] | 136 | skb_scrub_packet(skb, xnet); |
Jesse Gross | a09a4c8 | 2016-03-19 09:32:02 -0700 | [diff] [blame] | 137 | |
| 138 | return iptunnel_pull_offloads(skb); |
Pravin B Shelar | 3d7b46c | 2013-06-17 17:50:02 -0700 | [diff] [blame] | 139 | } |
Jiri Benc | a6d5bbf | 2016-04-05 14:47:12 +0200 | [diff] [blame] | 140 | EXPORT_SYMBOL_GPL(__iptunnel_pull_header); |
Eric Dumazet | 2d26f0a | 2013-10-19 11:42:55 -0700 | [diff] [blame] | 141 | |
Jiri Benc | 63d008a | 2015-09-22 18:12:11 +0200 | [diff] [blame] | 142 | struct metadata_dst *iptunnel_metadata_reply(struct metadata_dst *md, |
| 143 | gfp_t flags) |
| 144 | { |
| 145 | struct metadata_dst *res; |
| 146 | struct ip_tunnel_info *dst, *src; |
| 147 | |
| 148 | if (!md || md->u.tun_info.mode & IP_TUNNEL_INFO_TX) |
| 149 | return NULL; |
| 150 | |
| 151 | res = metadata_dst_alloc(0, flags); |
| 152 | if (!res) |
| 153 | return NULL; |
| 154 | |
| 155 | dst = &res->u.tun_info; |
| 156 | src = &md->u.tun_info; |
| 157 | dst->key.tun_id = src->key.tun_id; |
| 158 | if (src->mode & IP_TUNNEL_INFO_IPV6) |
| 159 | memcpy(&dst->key.u.ipv6.dst, &src->key.u.ipv6.src, |
| 160 | sizeof(struct in6_addr)); |
| 161 | else |
| 162 | dst->key.u.ipv4.dst = src->key.u.ipv4.src; |
| 163 | dst->mode = src->mode | IP_TUNNEL_INFO_TX; |
| 164 | |
| 165 | return res; |
| 166 | } |
| 167 | EXPORT_SYMBOL_GPL(iptunnel_metadata_reply); |
| 168 | |
Alexander Duyck | aed069d | 2016-04-14 15:33:37 -0400 | [diff] [blame] | 169 | int iptunnel_handle_offloads(struct sk_buff *skb, |
| 170 | int gso_type_mask) |
Eric Dumazet | 2d26f0a | 2013-10-19 11:42:55 -0700 | [diff] [blame] | 171 | { |
| 172 | int err; |
| 173 | |
| 174 | if (likely(!skb->encapsulation)) { |
| 175 | skb_reset_inner_headers(skb); |
| 176 | skb->encapsulation = 1; |
| 177 | } |
| 178 | |
| 179 | if (skb_is_gso(skb)) { |
Eric Dumazet | 9580bf2 | 2016-04-30 10:19:29 -0700 | [diff] [blame] | 180 | err = skb_header_unclone(skb, GFP_ATOMIC); |
Eric Dumazet | 2d26f0a | 2013-10-19 11:42:55 -0700 | [diff] [blame] | 181 | if (unlikely(err)) |
Alexander Duyck | aed069d | 2016-04-14 15:33:37 -0400 | [diff] [blame] | 182 | return err; |
Eric Dumazet | 2d26f0a | 2013-10-19 11:42:55 -0700 | [diff] [blame] | 183 | skb_shinfo(skb)->gso_type |= gso_type_mask; |
Alexander Duyck | aed069d | 2016-04-14 15:33:37 -0400 | [diff] [blame] | 184 | return 0; |
Eric Dumazet | 2d26f0a | 2013-10-19 11:42:55 -0700 | [diff] [blame] | 185 | } |
| 186 | |
Edward Cree | 6fa7966 | 2016-02-11 21:02:31 +0000 | [diff] [blame] | 187 | if (skb->ip_summed != CHECKSUM_PARTIAL) { |
Eric Dumazet | 2d26f0a | 2013-10-19 11:42:55 -0700 | [diff] [blame] | 188 | skb->ip_summed = CHECKSUM_NONE; |
Edward Cree | 6fa7966 | 2016-02-11 21:02:31 +0000 | [diff] [blame] | 189 | /* We clear encapsulation here to prevent badly-written |
| 190 | * drivers potentially deciding to offload an inner checksum |
| 191 | * if we set CHECKSUM_PARTIAL on the outer header. |
| 192 | * This should go away when the drivers are all fixed. |
| 193 | */ |
Edward Cree | 179bc67 | 2016-02-11 20:48:04 +0000 | [diff] [blame] | 194 | skb->encapsulation = 0; |
| 195 | } |
Eric Dumazet | 2d26f0a | 2013-10-19 11:42:55 -0700 | [diff] [blame] | 196 | |
Alexander Duyck | aed069d | 2016-04-14 15:33:37 -0400 | [diff] [blame] | 197 | return 0; |
Eric Dumazet | 2d26f0a | 2013-10-19 11:42:55 -0700 | [diff] [blame] | 198 | } |
| 199 | EXPORT_SYMBOL_GPL(iptunnel_handle_offloads); |
David S. Miller | ebe44f3 | 2014-02-20 02:14:23 -0500 | [diff] [blame] | 200 | |
| 201 | /* Often modified stats are per cpu, other are shared (netdev->stats) */ |
| 202 | struct rtnl_link_stats64 *ip_tunnel_get_stats64(struct net_device *dev, |
| 203 | struct rtnl_link_stats64 *tot) |
| 204 | { |
| 205 | int i; |
| 206 | |
Alexander Duyck | c24a596 | 2015-05-14 14:31:28 -0700 | [diff] [blame] | 207 | netdev_stats_to_stats64(tot, &dev->stats); |
| 208 | |
David S. Miller | ebe44f3 | 2014-02-20 02:14:23 -0500 | [diff] [blame] | 209 | for_each_possible_cpu(i) { |
| 210 | const struct pcpu_sw_netstats *tstats = |
| 211 | per_cpu_ptr(dev->tstats, i); |
| 212 | u64 rx_packets, rx_bytes, tx_packets, tx_bytes; |
| 213 | unsigned int start; |
| 214 | |
| 215 | do { |
Eric W. Biederman | 57a7744 | 2014-03-13 21:26:42 -0700 | [diff] [blame] | 216 | start = u64_stats_fetch_begin_irq(&tstats->syncp); |
David S. Miller | ebe44f3 | 2014-02-20 02:14:23 -0500 | [diff] [blame] | 217 | rx_packets = tstats->rx_packets; |
| 218 | tx_packets = tstats->tx_packets; |
| 219 | rx_bytes = tstats->rx_bytes; |
| 220 | tx_bytes = tstats->tx_bytes; |
Eric W. Biederman | 57a7744 | 2014-03-13 21:26:42 -0700 | [diff] [blame] | 221 | } while (u64_stats_fetch_retry_irq(&tstats->syncp, start)); |
David S. Miller | ebe44f3 | 2014-02-20 02:14:23 -0500 | [diff] [blame] | 222 | |
| 223 | tot->rx_packets += rx_packets; |
| 224 | tot->tx_packets += tx_packets; |
| 225 | tot->rx_bytes += rx_bytes; |
| 226 | tot->tx_bytes += tx_bytes; |
| 227 | } |
| 228 | |
David S. Miller | ebe44f3 | 2014-02-20 02:14:23 -0500 | [diff] [blame] | 229 | return tot; |
| 230 | } |
| 231 | EXPORT_SYMBOL_GPL(ip_tunnel_get_stats64); |
Thomas Graf | 3093fbe | 2015-07-21 10:44:00 +0200 | [diff] [blame] | 232 | |
Jiri Benc | a1c234f | 2015-08-14 16:40:40 +0200 | [diff] [blame] | 233 | static const struct nla_policy ip_tun_policy[LWTUNNEL_IP_MAX + 1] = { |
| 234 | [LWTUNNEL_IP_ID] = { .type = NLA_U64 }, |
| 235 | [LWTUNNEL_IP_DST] = { .type = NLA_U32 }, |
| 236 | [LWTUNNEL_IP_SRC] = { .type = NLA_U32 }, |
| 237 | [LWTUNNEL_IP_TTL] = { .type = NLA_U8 }, |
| 238 | [LWTUNNEL_IP_TOS] = { .type = NLA_U8 }, |
Jiri Benc | a1c234f | 2015-08-14 16:40:40 +0200 | [diff] [blame] | 239 | [LWTUNNEL_IP_FLAGS] = { .type = NLA_U16 }, |
Thomas Graf | 3093fbe | 2015-07-21 10:44:00 +0200 | [diff] [blame] | 240 | }; |
| 241 | |
| 242 | static int ip_tun_build_state(struct net_device *dev, struct nlattr *attr, |
Tom Herbert | 127eb7c | 2015-08-24 09:45:41 -0700 | [diff] [blame] | 243 | unsigned int family, const void *cfg, |
Thomas Graf | 3093fbe | 2015-07-21 10:44:00 +0200 | [diff] [blame] | 244 | struct lwtunnel_state **ts) |
| 245 | { |
| 246 | struct ip_tunnel_info *tun_info; |
| 247 | struct lwtunnel_state *new_state; |
Jiri Benc | a1c234f | 2015-08-14 16:40:40 +0200 | [diff] [blame] | 248 | struct nlattr *tb[LWTUNNEL_IP_MAX + 1]; |
Thomas Graf | 3093fbe | 2015-07-21 10:44:00 +0200 | [diff] [blame] | 249 | int err; |
| 250 | |
Jiri Benc | a1c234f | 2015-08-14 16:40:40 +0200 | [diff] [blame] | 251 | err = nla_parse_nested(tb, LWTUNNEL_IP_MAX, attr, ip_tun_policy); |
Thomas Graf | 3093fbe | 2015-07-21 10:44:00 +0200 | [diff] [blame] | 252 | if (err < 0) |
| 253 | return err; |
| 254 | |
| 255 | new_state = lwtunnel_state_alloc(sizeof(*tun_info)); |
| 256 | if (!new_state) |
| 257 | return -ENOMEM; |
| 258 | |
| 259 | new_state->type = LWTUNNEL_ENCAP_IP; |
| 260 | |
| 261 | tun_info = lwt_tun_info(new_state); |
| 262 | |
Jiri Benc | a1c234f | 2015-08-14 16:40:40 +0200 | [diff] [blame] | 263 | if (tb[LWTUNNEL_IP_ID]) |
Lance Richardson | 30d3d83 | 2016-01-06 17:22:45 -0500 | [diff] [blame] | 264 | tun_info->key.tun_id = nla_get_be64(tb[LWTUNNEL_IP_ID]); |
Thomas Graf | 3093fbe | 2015-07-21 10:44:00 +0200 | [diff] [blame] | 265 | |
Jiri Benc | a1c234f | 2015-08-14 16:40:40 +0200 | [diff] [blame] | 266 | if (tb[LWTUNNEL_IP_DST]) |
Haishuang Yan | 7822ce7 | 2016-03-31 18:21:38 +0800 | [diff] [blame] | 267 | tun_info->key.u.ipv4.dst = nla_get_in_addr(tb[LWTUNNEL_IP_DST]); |
Thomas Graf | 3093fbe | 2015-07-21 10:44:00 +0200 | [diff] [blame] | 268 | |
Jiri Benc | a1c234f | 2015-08-14 16:40:40 +0200 | [diff] [blame] | 269 | if (tb[LWTUNNEL_IP_SRC]) |
Haishuang Yan | 7822ce7 | 2016-03-31 18:21:38 +0800 | [diff] [blame] | 270 | tun_info->key.u.ipv4.src = nla_get_in_addr(tb[LWTUNNEL_IP_SRC]); |
Thomas Graf | 3093fbe | 2015-07-21 10:44:00 +0200 | [diff] [blame] | 271 | |
Jiri Benc | a1c234f | 2015-08-14 16:40:40 +0200 | [diff] [blame] | 272 | if (tb[LWTUNNEL_IP_TTL]) |
Jiri Benc | 7c383fb | 2015-08-20 13:56:24 +0200 | [diff] [blame] | 273 | tun_info->key.ttl = nla_get_u8(tb[LWTUNNEL_IP_TTL]); |
Thomas Graf | 3093fbe | 2015-07-21 10:44:00 +0200 | [diff] [blame] | 274 | |
Jiri Benc | a1c234f | 2015-08-14 16:40:40 +0200 | [diff] [blame] | 275 | if (tb[LWTUNNEL_IP_TOS]) |
Jiri Benc | 7c383fb | 2015-08-20 13:56:24 +0200 | [diff] [blame] | 276 | tun_info->key.tos = nla_get_u8(tb[LWTUNNEL_IP_TOS]); |
Thomas Graf | 3093fbe | 2015-07-21 10:44:00 +0200 | [diff] [blame] | 277 | |
Jiri Benc | a1c234f | 2015-08-14 16:40:40 +0200 | [diff] [blame] | 278 | if (tb[LWTUNNEL_IP_FLAGS]) |
Lance Richardson | 30d3d83 | 2016-01-06 17:22:45 -0500 | [diff] [blame] | 279 | tun_info->key.tun_flags = nla_get_be16(tb[LWTUNNEL_IP_FLAGS]); |
Thomas Graf | 3093fbe | 2015-07-21 10:44:00 +0200 | [diff] [blame] | 280 | |
| 281 | tun_info->mode = IP_TUNNEL_INFO_TX; |
Thomas Graf | 3093fbe | 2015-07-21 10:44:00 +0200 | [diff] [blame] | 282 | tun_info->options_len = 0; |
| 283 | |
| 284 | *ts = new_state; |
| 285 | |
| 286 | return 0; |
| 287 | } |
| 288 | |
| 289 | static int ip_tun_fill_encap_info(struct sk_buff *skb, |
| 290 | struct lwtunnel_state *lwtstate) |
| 291 | { |
| 292 | struct ip_tunnel_info *tun_info = lwt_tun_info(lwtstate); |
| 293 | |
Nicolas Dichtel | b46f6de | 2016-04-22 17:31:18 +0200 | [diff] [blame] | 294 | if (nla_put_be64(skb, LWTUNNEL_IP_ID, tun_info->key.tun_id, |
| 295 | LWTUNNEL_IP_PAD) || |
Haishuang Yan | 7822ce7 | 2016-03-31 18:21:38 +0800 | [diff] [blame] | 296 | nla_put_in_addr(skb, LWTUNNEL_IP_DST, tun_info->key.u.ipv4.dst) || |
| 297 | nla_put_in_addr(skb, LWTUNNEL_IP_SRC, tun_info->key.u.ipv4.src) || |
Jiri Benc | 7c383fb | 2015-08-20 13:56:24 +0200 | [diff] [blame] | 298 | nla_put_u8(skb, LWTUNNEL_IP_TOS, tun_info->key.tos) || |
| 299 | nla_put_u8(skb, LWTUNNEL_IP_TTL, tun_info->key.ttl) || |
Lance Richardson | 30d3d83 | 2016-01-06 17:22:45 -0500 | [diff] [blame] | 300 | nla_put_be16(skb, LWTUNNEL_IP_FLAGS, tun_info->key.tun_flags)) |
Thomas Graf | 3093fbe | 2015-07-21 10:44:00 +0200 | [diff] [blame] | 301 | return -ENOMEM; |
| 302 | |
| 303 | return 0; |
| 304 | } |
| 305 | |
| 306 | static int ip_tun_encap_nlsize(struct lwtunnel_state *lwtstate) |
| 307 | { |
Nicolas Dichtel | b46f6de | 2016-04-22 17:31:18 +0200 | [diff] [blame] | 308 | return nla_total_size_64bit(8) /* LWTUNNEL_IP_ID */ |
Jiri Benc | a1c234f | 2015-08-14 16:40:40 +0200 | [diff] [blame] | 309 | + nla_total_size(4) /* LWTUNNEL_IP_DST */ |
| 310 | + nla_total_size(4) /* LWTUNNEL_IP_SRC */ |
| 311 | + nla_total_size(1) /* LWTUNNEL_IP_TOS */ |
| 312 | + nla_total_size(1) /* LWTUNNEL_IP_TTL */ |
Jiri Benc | a1c234f | 2015-08-14 16:40:40 +0200 | [diff] [blame] | 313 | + nla_total_size(2); /* LWTUNNEL_IP_FLAGS */ |
Thomas Graf | 3093fbe | 2015-07-21 10:44:00 +0200 | [diff] [blame] | 314 | } |
| 315 | |
Jiri Benc | 2d79849 | 2015-08-18 18:42:09 +0200 | [diff] [blame] | 316 | static int ip_tun_cmp_encap(struct lwtunnel_state *a, struct lwtunnel_state *b) |
| 317 | { |
| 318 | return memcmp(lwt_tun_info(a), lwt_tun_info(b), |
| 319 | sizeof(struct ip_tunnel_info)); |
| 320 | } |
| 321 | |
Thomas Graf | 3093fbe | 2015-07-21 10:44:00 +0200 | [diff] [blame] | 322 | static const struct lwtunnel_encap_ops ip_tun_lwt_ops = { |
| 323 | .build_state = ip_tun_build_state, |
| 324 | .fill_encap = ip_tun_fill_encap_info, |
| 325 | .get_encap_size = ip_tun_encap_nlsize, |
Jiri Benc | 2d79849 | 2015-08-18 18:42:09 +0200 | [diff] [blame] | 326 | .cmp_encap = ip_tun_cmp_encap, |
Thomas Graf | 3093fbe | 2015-07-21 10:44:00 +0200 | [diff] [blame] | 327 | }; |
| 328 | |
Jiri Benc | 32a2b00 | 2015-08-20 13:56:32 +0200 | [diff] [blame] | 329 | static const struct nla_policy ip6_tun_policy[LWTUNNEL_IP6_MAX + 1] = { |
| 330 | [LWTUNNEL_IP6_ID] = { .type = NLA_U64 }, |
| 331 | [LWTUNNEL_IP6_DST] = { .len = sizeof(struct in6_addr) }, |
| 332 | [LWTUNNEL_IP6_SRC] = { .len = sizeof(struct in6_addr) }, |
| 333 | [LWTUNNEL_IP6_HOPLIMIT] = { .type = NLA_U8 }, |
| 334 | [LWTUNNEL_IP6_TC] = { .type = NLA_U8 }, |
Jiri Benc | 32a2b00 | 2015-08-20 13:56:32 +0200 | [diff] [blame] | 335 | [LWTUNNEL_IP6_FLAGS] = { .type = NLA_U16 }, |
| 336 | }; |
| 337 | |
| 338 | static int ip6_tun_build_state(struct net_device *dev, struct nlattr *attr, |
Tom Herbert | 127eb7c | 2015-08-24 09:45:41 -0700 | [diff] [blame] | 339 | unsigned int family, const void *cfg, |
Jiri Benc | 32a2b00 | 2015-08-20 13:56:32 +0200 | [diff] [blame] | 340 | struct lwtunnel_state **ts) |
| 341 | { |
| 342 | struct ip_tunnel_info *tun_info; |
| 343 | struct lwtunnel_state *new_state; |
| 344 | struct nlattr *tb[LWTUNNEL_IP6_MAX + 1]; |
| 345 | int err; |
| 346 | |
| 347 | err = nla_parse_nested(tb, LWTUNNEL_IP6_MAX, attr, ip6_tun_policy); |
| 348 | if (err < 0) |
| 349 | return err; |
| 350 | |
| 351 | new_state = lwtunnel_state_alloc(sizeof(*tun_info)); |
| 352 | if (!new_state) |
| 353 | return -ENOMEM; |
| 354 | |
| 355 | new_state->type = LWTUNNEL_ENCAP_IP6; |
| 356 | |
| 357 | tun_info = lwt_tun_info(new_state); |
| 358 | |
| 359 | if (tb[LWTUNNEL_IP6_ID]) |
Lance Richardson | 30d3d83 | 2016-01-06 17:22:45 -0500 | [diff] [blame] | 360 | tun_info->key.tun_id = nla_get_be64(tb[LWTUNNEL_IP6_ID]); |
Jiri Benc | 32a2b00 | 2015-08-20 13:56:32 +0200 | [diff] [blame] | 361 | |
| 362 | if (tb[LWTUNNEL_IP6_DST]) |
| 363 | tun_info->key.u.ipv6.dst = nla_get_in6_addr(tb[LWTUNNEL_IP6_DST]); |
| 364 | |
| 365 | if (tb[LWTUNNEL_IP6_SRC]) |
| 366 | tun_info->key.u.ipv6.src = nla_get_in6_addr(tb[LWTUNNEL_IP6_SRC]); |
| 367 | |
| 368 | if (tb[LWTUNNEL_IP6_HOPLIMIT]) |
| 369 | tun_info->key.ttl = nla_get_u8(tb[LWTUNNEL_IP6_HOPLIMIT]); |
| 370 | |
| 371 | if (tb[LWTUNNEL_IP6_TC]) |
| 372 | tun_info->key.tos = nla_get_u8(tb[LWTUNNEL_IP6_TC]); |
| 373 | |
Jiri Benc | 32a2b00 | 2015-08-20 13:56:32 +0200 | [diff] [blame] | 374 | if (tb[LWTUNNEL_IP6_FLAGS]) |
Lance Richardson | 30d3d83 | 2016-01-06 17:22:45 -0500 | [diff] [blame] | 375 | tun_info->key.tun_flags = nla_get_be16(tb[LWTUNNEL_IP6_FLAGS]); |
Jiri Benc | 32a2b00 | 2015-08-20 13:56:32 +0200 | [diff] [blame] | 376 | |
Jiri Benc | 7f9562a | 2015-08-28 20:48:20 +0200 | [diff] [blame] | 377 | tun_info->mode = IP_TUNNEL_INFO_TX | IP_TUNNEL_INFO_IPV6; |
Jiri Benc | 32a2b00 | 2015-08-20 13:56:32 +0200 | [diff] [blame] | 378 | tun_info->options_len = 0; |
| 379 | |
| 380 | *ts = new_state; |
| 381 | |
| 382 | return 0; |
| 383 | } |
| 384 | |
| 385 | static int ip6_tun_fill_encap_info(struct sk_buff *skb, |
| 386 | struct lwtunnel_state *lwtstate) |
| 387 | { |
| 388 | struct ip_tunnel_info *tun_info = lwt_tun_info(lwtstate); |
| 389 | |
Nicolas Dichtel | b46f6de | 2016-04-22 17:31:18 +0200 | [diff] [blame] | 390 | if (nla_put_be64(skb, LWTUNNEL_IP6_ID, tun_info->key.tun_id, |
| 391 | LWTUNNEL_IP6_PAD) || |
Jiri Benc | 32a2b00 | 2015-08-20 13:56:32 +0200 | [diff] [blame] | 392 | nla_put_in6_addr(skb, LWTUNNEL_IP6_DST, &tun_info->key.u.ipv6.dst) || |
| 393 | nla_put_in6_addr(skb, LWTUNNEL_IP6_SRC, &tun_info->key.u.ipv6.src) || |
Quentin Armitage | 995096a | 2016-03-27 17:06:11 +0100 | [diff] [blame] | 394 | nla_put_u8(skb, LWTUNNEL_IP6_TC, tun_info->key.tos) || |
| 395 | nla_put_u8(skb, LWTUNNEL_IP6_HOPLIMIT, tun_info->key.ttl) || |
Lance Richardson | 30d3d83 | 2016-01-06 17:22:45 -0500 | [diff] [blame] | 396 | nla_put_be16(skb, LWTUNNEL_IP6_FLAGS, tun_info->key.tun_flags)) |
Jiri Benc | 32a2b00 | 2015-08-20 13:56:32 +0200 | [diff] [blame] | 397 | return -ENOMEM; |
| 398 | |
| 399 | return 0; |
| 400 | } |
| 401 | |
| 402 | static int ip6_tun_encap_nlsize(struct lwtunnel_state *lwtstate) |
| 403 | { |
Nicolas Dichtel | b46f6de | 2016-04-22 17:31:18 +0200 | [diff] [blame] | 404 | return nla_total_size_64bit(8) /* LWTUNNEL_IP6_ID */ |
Jiri Benc | 32a2b00 | 2015-08-20 13:56:32 +0200 | [diff] [blame] | 405 | + nla_total_size(16) /* LWTUNNEL_IP6_DST */ |
| 406 | + nla_total_size(16) /* LWTUNNEL_IP6_SRC */ |
| 407 | + nla_total_size(1) /* LWTUNNEL_IP6_HOPLIMIT */ |
| 408 | + nla_total_size(1) /* LWTUNNEL_IP6_TC */ |
Jiri Benc | 32a2b00 | 2015-08-20 13:56:32 +0200 | [diff] [blame] | 409 | + nla_total_size(2); /* LWTUNNEL_IP6_FLAGS */ |
| 410 | } |
| 411 | |
| 412 | static const struct lwtunnel_encap_ops ip6_tun_lwt_ops = { |
| 413 | .build_state = ip6_tun_build_state, |
| 414 | .fill_encap = ip6_tun_fill_encap_info, |
| 415 | .get_encap_size = ip6_tun_encap_nlsize, |
| 416 | .cmp_encap = ip_tun_cmp_encap, |
| 417 | }; |
| 418 | |
Thomas Graf | 045a0fa | 2015-07-23 10:08:44 +0200 | [diff] [blame] | 419 | void __init ip_tunnel_core_init(void) |
Thomas Graf | 3093fbe | 2015-07-21 10:44:00 +0200 | [diff] [blame] | 420 | { |
Daniel Borkmann | fca5fdf | 2016-03-16 01:42:51 +0100 | [diff] [blame] | 421 | /* If you land here, make sure whether increasing ip_tunnel_info's |
| 422 | * options_len is a reasonable choice with its usage in front ends |
| 423 | * (f.e., it's part of flow keys, etc). |
| 424 | */ |
| 425 | BUILD_BUG_ON(IP_TUNNEL_OPTS_MAX != 255); |
| 426 | |
Thomas Graf | 3093fbe | 2015-07-21 10:44:00 +0200 | [diff] [blame] | 427 | lwtunnel_encap_add_ops(&ip_tun_lwt_ops, LWTUNNEL_ENCAP_IP); |
Jiri Benc | 32a2b00 | 2015-08-20 13:56:32 +0200 | [diff] [blame] | 428 | lwtunnel_encap_add_ops(&ip6_tun_lwt_ops, LWTUNNEL_ENCAP_IP6); |
Thomas Graf | 3093fbe | 2015-07-21 10:44:00 +0200 | [diff] [blame] | 429 | } |
Thomas Graf | e703087 | 2015-07-21 10:44:01 +0200 | [diff] [blame] | 430 | |
| 431 | struct static_key ip_tunnel_metadata_cnt = STATIC_KEY_INIT_FALSE; |
| 432 | EXPORT_SYMBOL(ip_tunnel_metadata_cnt); |
| 433 | |
| 434 | void ip_tunnel_need_metadata(void) |
| 435 | { |
| 436 | static_key_slow_inc(&ip_tunnel_metadata_cnt); |
| 437 | } |
| 438 | EXPORT_SYMBOL_GPL(ip_tunnel_need_metadata); |
| 439 | |
| 440 | void ip_tunnel_unneed_metadata(void) |
| 441 | { |
| 442 | static_key_slow_dec(&ip_tunnel_metadata_cnt); |
| 443 | } |
| 444 | EXPORT_SYMBOL_GPL(ip_tunnel_unneed_metadata); |