blob: 236503a50759a7229b9e9ee31ac99a0f2a7a012e [file] [log] [blame]
Greg Kroah-Hartmanb2441312017-11-01 15:07:57 +01001/* SPDX-License-Identifier: GPL-2.0 */
Pravin B Shelarc5441932013-03-25 14:49:35 +00002#ifndef __NET_IP_TUNNELS_H
3#define __NET_IP_TUNNELS_H 1
4
5#include <linux/if_tunnel.h>
6#include <linux/netdevice.h>
7#include <linux/skbuff.h>
Jiri Benc7f9562a2015-08-28 20:48:20 +02008#include <linux/socket.h>
Pravin B Shelarc5441932013-03-25 14:49:35 +00009#include <linux/types.h>
10#include <linux/u64_stats_sync.h>
Daniel Borkmannfca5fdf2016-03-16 01:42:51 +010011#include <linux/bitops.h>
12
Pravin B Shelarc5441932013-03-25 14:49:35 +000013#include <net/dsfield.h>
14#include <net/gro_cells.h>
15#include <net/inet_ecn.h>
Tom Herbert56328482014-09-17 12:25:58 -070016#include <net/netns/generic.h>
Pravin B Shelarc5441932013-03-25 14:49:35 +000017#include <net/rtnetlink.h>
Thomas Graf3093fbe2015-07-21 10:44:00 +020018#include <net/lwtunnel.h>
Paolo Abenie09acdd2016-02-12 15:43:55 +010019#include <net/dst_cache.h>
Pravin B Shelarc5441932013-03-25 14:49:35 +000020
21#if IS_ENABLED(CONFIG_IPV6)
22#include <net/ipv6.h>
23#include <net/ip6_fib.h>
24#include <net/ip6_route.h>
25#endif
26
27/* Keep error state on tunnel for 30 sec */
28#define IPTUNNEL_ERR_TIMEO (30*HZ)
29
Thomas Graf1d8fff92015-07-21 10:43:54 +020030/* Used to memset ip_tunnel padding. */
Jiri Benc376534a2015-08-20 13:56:22 +020031#define IP_TUNNEL_KEY_SIZE offsetofend(struct ip_tunnel_key, tp_dst)
Thomas Graf1d8fff92015-07-21 10:43:54 +020032
Jiri Bencc1ea5d62015-08-20 13:56:23 +020033/* Used to memset ipv4 address padding. */
34#define IP_TUNNEL_KEY_IPV4_PAD offsetofend(struct ip_tunnel_key, u.ipv4.dst)
35#define IP_TUNNEL_KEY_IPV4_PAD_LEN \
Pankaj Bharadiyac5936422019-12-09 10:31:43 -080036 (sizeof_field(struct ip_tunnel_key, u) - \
37 sizeof_field(struct ip_tunnel_key, u.ipv4))
Jiri Bencc1ea5d62015-08-20 13:56:23 +020038
Thomas Graf1d8fff92015-07-21 10:43:54 +020039struct ip_tunnel_key {
40 __be64 tun_id;
Jiri Bencc1ea5d62015-08-20 13:56:23 +020041 union {
42 struct {
43 __be32 src;
44 __be32 dst;
45 } ipv4;
46 struct {
47 struct in6_addr src;
48 struct in6_addr dst;
49 } ipv6;
50 } u;
Thomas Graf1d8fff92015-07-21 10:43:54 +020051 __be16 tun_flags;
Jiri Benc7c383fb2015-08-20 13:56:24 +020052 u8 tos; /* TOS for IPv4, TC for IPv6 */
53 u8 ttl; /* TTL for IPv4, HL for IPv6 */
Daniel Borkmann13461142016-03-09 03:00:02 +010054 __be32 label; /* Flow Label for IPv6 */
Thomas Graf1d8fff92015-07-21 10:43:54 +020055 __be16 tp_src;
56 __be16 tp_dst;
Jiri Bencac1cf392015-08-20 13:56:20 +020057};
Thomas Graf1d8fff92015-07-21 10:43:54 +020058
Jiri Benc46fa0622015-08-28 20:48:19 +020059/* Flags for ip_tunnel_info mode. */
60#define IP_TUNNEL_INFO_TX 0x01 /* represents tx tunnel parameters */
Jiri Benc7f9562a2015-08-28 20:48:20 +020061#define IP_TUNNEL_INFO_IPV6 0x02 /* key contains IPv6 addresses */
Roopa Prabhuf35581d2017-01-31 22:59:51 -080062#define IP_TUNNEL_INFO_BRIDGE 0x04 /* represents a bridged tunnel id */
Thomas Grafee122c72015-07-21 10:43:58 +020063
Daniel Borkmannfca5fdf2016-03-16 01:42:51 +010064/* Maximum tunnel options length. */
65#define IP_TUNNEL_OPTS_MAX \
Pankaj Bharadiyac5936422019-12-09 10:31:43 -080066 GENMASK((sizeof_field(struct ip_tunnel_info, \
Daniel Borkmannfca5fdf2016-03-16 01:42:51 +010067 options_len) * BITS_PER_BYTE) - 1, 0)
68
Thomas Graf1d8fff92015-07-21 10:43:54 +020069struct ip_tunnel_info {
70 struct ip_tunnel_key key;
Paolo Abenid71785f2016-02-12 15:43:57 +010071#ifdef CONFIG_DST_CACHE
72 struct dst_cache dst_cache;
73#endif
Thomas Graf1d8fff92015-07-21 10:43:54 +020074 u8 options_len;
Thomas Grafee122c72015-07-21 10:43:58 +020075 u8 mode;
Thomas Graf1d8fff92015-07-21 10:43:54 +020076};
77
Pravin B Shelarc5441932013-03-25 14:49:35 +000078/* 6rd prefix/relay information */
79#ifdef CONFIG_IPV6_SIT_6RD
80struct ip_tunnel_6rd_parm {
81 struct in6_addr prefix;
82 __be32 relay_prefix;
83 u16 prefixlen;
84 u16 relay_prefixlen;
85};
86#endif
87
Tom Herbert56328482014-09-17 12:25:58 -070088struct ip_tunnel_encap {
Jiri Benc6b8847c2015-08-20 13:56:21 +020089 u16 type;
90 u16 flags;
Tom Herbert56328482014-09-17 12:25:58 -070091 __be16 sport;
92 __be16 dport;
93};
94
Pravin B Shelarc5441932013-03-25 14:49:35 +000095struct ip_tunnel_prl_entry {
96 struct ip_tunnel_prl_entry __rcu *next;
97 __be32 addr;
98 u16 flags;
99 struct rcu_head rcu_head;
100};
101
Pravin B Shelar2e15ea32015-08-07 23:51:42 -0700102struct metadata_dst;
103
Pravin B Shelarc5441932013-03-25 14:49:35 +0000104struct ip_tunnel {
105 struct ip_tunnel __rcu *next;
106 struct hlist_node hash_node;
107 struct net_device *dev;
Nicolas Dichtel5e6700b2013-06-26 16:11:28 +0200108 struct net *net; /* netns for packet i/o */
Pravin B Shelarc5441932013-03-25 14:49:35 +0000109
Pravin B Shelarc5441932013-03-25 14:49:35 +0000110 unsigned long err_time; /* Time when the last ICMP error
111 * arrived */
stephen hemmingerf38ba952016-04-13 17:02:21 -0700112 int err_count; /* Number of arrived ICMP errors */
Pravin B Shelarc5441932013-03-25 14:49:35 +0000113
114 /* These four fields used only by GRE */
Jiri Benc6b8847c2015-08-20 13:56:21 +0200115 u32 i_seqno; /* The last seen seqno */
116 u32 o_seqno; /* The last output seqno */
Tom Herbert56328482014-09-17 12:25:58 -0700117 int tun_hlen; /* Precalculated header length */
Pravin B Shelarc5441932013-03-25 14:49:35 +0000118
William Tuf551c912017-12-13 16:38:56 -0800119 /* These four fields used only by ERSPAN */
William Tu84e54fe2017-08-22 09:40:28 -0700120 u32 index; /* ERSPAN type II index */
William Tuf551c912017-12-13 16:38:56 -0800121 u8 erspan_ver; /* ERSPAN version */
122 u8 dir; /* ERSPAN direction */
123 u16 hwid; /* ERSPAN hardware ID */
William Tu84e54fe2017-08-22 09:40:28 -0700124
Paolo Abenie09acdd2016-02-12 15:43:55 +0100125 struct dst_cache dst_cache;
Tom Herbert7d442fa2014-01-02 11:48:26 -0800126
Pravin B Shelarc5441932013-03-25 14:49:35 +0000127 struct ip_tunnel_parm parms;
128
stephen hemmingerf38ba952016-04-13 17:02:21 -0700129 int mlink;
Tom Herbert56328482014-09-17 12:25:58 -0700130 int encap_hlen; /* Encap header length (FOU,GUE) */
Tom Herbert56328482014-09-17 12:25:58 -0700131 int hlen; /* tun_hlen + encap_hlen */
stephen hemmingerf38ba952016-04-13 17:02:21 -0700132 struct ip_tunnel_encap encap;
Tom Herbert56328482014-09-17 12:25:58 -0700133
Pravin B Shelarc5441932013-03-25 14:49:35 +0000134 /* for SIT */
135#ifdef CONFIG_IPV6_SIT_6RD
136 struct ip_tunnel_6rd_parm ip6rd;
137#endif
138 struct ip_tunnel_prl_entry __rcu *prl; /* potential router list */
139 unsigned int prl_count; /* # of entries in PRL */
Alexey Dobriyanc7d03a02016-11-17 04:58:21 +0300140 unsigned int ip_tnl_net_id;
Pravin B Shelarc5441932013-03-25 14:49:35 +0000141 struct gro_cells gro_cells;
Craig Gallek9830ad42017-04-19 12:30:54 -0400142 __u32 fwmark;
Pravin B Shelar2e15ea32015-08-07 23:51:42 -0700143 bool collect_md;
Philip Prindeville22a59be2016-06-14 15:53:02 -0600144 bool ignore_df;
Pravin B Shelarc5441932013-03-25 14:49:35 +0000145};
146
Pravin B Shelarc5441932013-03-25 14:49:35 +0000147struct tnl_ptk_info {
148 __be16 flags;
149 __be16 proto;
150 __be32 key;
151 __be32 seq;
Eric Dumazet9b8c6d72016-06-18 21:52:05 -0700152 int hdr_len;
Pravin B Shelarc5441932013-03-25 14:49:35 +0000153};
154
155#define PACKET_RCVD 0
156#define PACKET_REJECT 1
Jiri Benc125372f2016-05-03 17:10:08 +0200157#define PACKET_NEXT 2
Pravin B Shelarc5441932013-03-25 14:49:35 +0000158
stephen hemminger6261d982013-08-05 22:51:37 -0700159#define IP_TNL_HASH_BITS 7
Pravin B Shelarc5441932013-03-25 14:49:35 +0000160#define IP_TNL_HASH_SIZE (1 << IP_TNL_HASH_BITS)
161
162struct ip_tunnel_net {
Pravin B Shelarc5441932013-03-25 14:49:35 +0000163 struct net_device *fb_tunnel_dev;
Eric Dumazet79134e62018-03-08 12:51:41 -0800164 struct rtnl_link_ops *rtnl_link_ops;
stephen hemminger6261d982013-08-05 22:51:37 -0700165 struct hlist_head tunnels[IP_TNL_HASH_SIZE];
Pravin B Shelar2e15ea32015-08-07 23:51:42 -0700166 struct ip_tunnel __rcu *collect_md_tun;
Eric Dumazet79134e62018-03-08 12:51:41 -0800167 int type;
Pravin B Shelarc5441932013-03-25 14:49:35 +0000168};
169
Pravin B Shelar4c222792015-08-30 18:09:38 -0700170static inline void ip_tunnel_key_init(struct ip_tunnel_key *key,
171 __be32 saddr, __be32 daddr,
Daniel Borkmann13461142016-03-09 03:00:02 +0100172 u8 tos, u8 ttl, __be32 label,
Pravin B Shelar4c222792015-08-30 18:09:38 -0700173 __be16 tp_src, __be16 tp_dst,
174 __be64 tun_id, __be16 tun_flags)
Thomas Graf1d8fff92015-07-21 10:43:54 +0200175{
Pravin B Shelar4c222792015-08-30 18:09:38 -0700176 key->tun_id = tun_id;
177 key->u.ipv4.src = saddr;
178 key->u.ipv4.dst = daddr;
179 memset((unsigned char *)key + IP_TUNNEL_KEY_IPV4_PAD,
Jiri Bencc1ea5d62015-08-20 13:56:23 +0200180 0, IP_TUNNEL_KEY_IPV4_PAD_LEN);
Pravin B Shelar4c222792015-08-30 18:09:38 -0700181 key->tos = tos;
182 key->ttl = ttl;
Daniel Borkmann13461142016-03-09 03:00:02 +0100183 key->label = label;
Pravin B Shelar4c222792015-08-30 18:09:38 -0700184 key->tun_flags = tun_flags;
Thomas Graf1d8fff92015-07-21 10:43:54 +0200185
186 /* For the tunnel types on the top of IPsec, the tp_src and tp_dst of
187 * the upper tunnel are used.
188 * E.g: GRE over IPSEC, the tp_src and tp_port are zero.
189 */
Pravin B Shelar4c222792015-08-30 18:09:38 -0700190 key->tp_src = tp_src;
191 key->tp_dst = tp_dst;
Thomas Graf1d8fff92015-07-21 10:43:54 +0200192
193 /* Clear struct padding. */
Pravin B Shelar4c222792015-08-30 18:09:38 -0700194 if (sizeof(*key) != IP_TUNNEL_KEY_SIZE)
195 memset((unsigned char *)key + IP_TUNNEL_KEY_SIZE,
196 0, sizeof(*key) - IP_TUNNEL_KEY_SIZE);
Thomas Graf1d8fff92015-07-21 10:43:54 +0200197}
198
Daniel Borkmanndb3c6132016-03-04 15:15:07 +0100199static inline bool
200ip_tunnel_dst_cache_usable(const struct sk_buff *skb,
201 const struct ip_tunnel_info *info)
202{
203 if (skb->mark)
204 return false;
205 if (!info)
206 return true;
207 if (info->key.tun_flags & TUNNEL_NOCACHE)
208 return false;
209
210 return true;
211}
212
Jiri Benc7f9562a2015-08-28 20:48:20 +0200213static inline unsigned short ip_tunnel_info_af(const struct ip_tunnel_info
214 *tun_info)
215{
216 return tun_info->mode & IP_TUNNEL_INFO_IPV6 ? AF_INET6 : AF_INET;
217}
218
Amir Vadaid817f432016-09-08 16:23:45 +0300219static inline __be64 key32_to_tunnel_id(__be32 key)
220{
221#ifdef __BIG_ENDIAN
222 return (__force __be64)key;
223#else
224 return (__force __be64)((__force u64)key << 32);
225#endif
226}
227
228/* Returns the least-significant 32 bits of a __be64. */
229static inline __be32 tunnel_id_to_key32(__be64 tun_id)
230{
231#ifdef __BIG_ENDIAN
232 return (__force __be32)tun_id;
233#else
234 return (__force __be32)((__force u64)tun_id >> 32);
235#endif
236}
237
Jesse Gross5243b6a2013-06-21 16:17:11 -0700238#ifdef CONFIG_INET
239
Petr Machatab0066da2018-02-27 14:53:38 +0100240static inline void ip_tunnel_init_flow(struct flowi4 *fl4,
241 int proto,
242 __be32 daddr, __be32 saddr,
243 __be32 key, __u8 tos, int oif,
wenxu24ba1442019-02-24 11:36:20 +0800244 __u32 mark, __u32 tun_inner_hash)
Petr Machatab0066da2018-02-27 14:53:38 +0100245{
246 memset(fl4, 0, sizeof(*fl4));
247 fl4->flowi4_oif = oif;
248 fl4->daddr = daddr;
249 fl4->saddr = saddr;
250 fl4->flowi4_tos = tos;
251 fl4->flowi4_proto = proto;
252 fl4->fl4_gre_key = key;
253 fl4->flowi4_mark = mark;
wenxu24ba1442019-02-24 11:36:20 +0800254 fl4->flowi4_multipath_hash = tun_inner_hash;
Petr Machatab0066da2018-02-27 14:53:38 +0100255}
256
Pravin B Shelarc5441932013-03-25 14:49:35 +0000257int ip_tunnel_init(struct net_device *dev);
258void ip_tunnel_uninit(struct net_device *dev);
259void ip_tunnel_dellink(struct net_device *dev, struct list_head *head);
Nicolas Dichtel1728d4f2015-01-15 15:11:17 +0100260struct net *ip_tunnel_get_link_net(const struct net_device *dev);
Nicolas Dichtel1e995842015-04-02 17:07:02 +0200261int ip_tunnel_get_iflink(const struct net_device *dev);
Alexey Dobriyanc7d03a02016-11-17 04:58:21 +0300262int ip_tunnel_init_net(struct net *net, unsigned int ip_tnl_net_id,
Eric Dumazetd3b6f6142013-06-07 13:26:05 -0700263 struct rtnl_link_ops *ops, char *devname);
Pravin B Shelarc5441932013-03-25 14:49:35 +0000264
Eric Dumazet64bc1782017-09-19 16:27:09 -0700265void ip_tunnel_delete_nets(struct list_head *list_net, unsigned int id,
266 struct rtnl_link_ops *ops);
Pravin B Shelarc5441932013-03-25 14:49:35 +0000267
268void ip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev,
Nicolas Dichtelbf3d6a82013-05-27 23:48:15 +0000269 const struct iphdr *tnl_params, const u8 protocol);
Alexei Starovoitovcfc73812016-09-15 13:00:29 -0700270void ip_md_tunnel_xmit(struct sk_buff *skb, struct net_device *dev,
wenxuc8b34e62019-01-22 18:39:50 +0800271 const u8 proto, int tunnel_hlen);
Pravin B Shelarc5441932013-03-25 14:49:35 +0000272int ip_tunnel_ioctl(struct net_device *dev, struct ip_tunnel_parm *p, int cmd);
David Wragg7e059152016-02-10 00:05:58 +0000273int __ip_tunnel_change_mtu(struct net_device *dev, int new_mtu, bool strict);
Pravin B Shelarc5441932013-03-25 14:49:35 +0000274int ip_tunnel_change_mtu(struct net_device *dev, int new_mtu);
275
stephen hemmingerbc1f4472017-01-06 19:12:52 -0800276void ip_tunnel_get_stats64(struct net_device *dev,
277 struct rtnl_link_stats64 *tot);
Pravin B Shelarc5441932013-03-25 14:49:35 +0000278struct ip_tunnel *ip_tunnel_lookup(struct ip_tunnel_net *itn,
279 int link, __be16 flags,
280 __be32 remote, __be32 local,
281 __be32 key);
282
283int ip_tunnel_rcv(struct ip_tunnel *tunnel, struct sk_buff *skb,
Pravin B Shelar2e15ea32015-08-07 23:51:42 -0700284 const struct tnl_ptk_info *tpi, struct metadata_dst *tun_dst,
285 bool log_ecn_error);
Pravin B Shelarc5441932013-03-25 14:49:35 +0000286int ip_tunnel_changelink(struct net_device *dev, struct nlattr *tb[],
Craig Gallek9830ad42017-04-19 12:30:54 -0400287 struct ip_tunnel_parm *p, __u32 fwmark);
Pravin B Shelarc5441932013-03-25 14:49:35 +0000288int ip_tunnel_newlink(struct net_device *dev, struct nlattr *tb[],
Craig Gallek9830ad42017-04-19 12:30:54 -0400289 struct ip_tunnel_parm *p, __u32 fwmark);
Alexey Dobriyanc7d03a02016-11-17 04:58:21 +0300290void ip_tunnel_setup(struct net_device *dev, unsigned int net_id);
Tom Herbert55c2bc12016-05-18 09:06:13 -0700291
292struct ip_tunnel_encap_ops {
293 size_t (*encap_hlen)(struct ip_tunnel_encap *e);
294 int (*build_header)(struct sk_buff *skb, struct ip_tunnel_encap *e,
295 u8 *protocol, struct flowi4 *fl4);
Stefano Brivioe7cc0822018-11-08 12:19:22 +0100296 int (*err_handler)(struct sk_buff *skb, u32 info);
Tom Herbert55c2bc12016-05-18 09:06:13 -0700297};
298
299#define MAX_IPTUN_ENCAP_OPS 8
300
301extern const struct ip_tunnel_encap_ops __rcu *
302 iptun_encaps[MAX_IPTUN_ENCAP_OPS];
303
304int ip_tunnel_encap_add_ops(const struct ip_tunnel_encap_ops *op,
305 unsigned int num);
306int ip_tunnel_encap_del_ops(const struct ip_tunnel_encap_ops *op,
307 unsigned int num);
308
Tom Herbert56328482014-09-17 12:25:58 -0700309int ip_tunnel_encap_setup(struct ip_tunnel *t,
310 struct ip_tunnel_encap *ipencap);
Pravin B Shelarc5441932013-03-25 14:49:35 +0000311
Willem de Bruijncb9f1b72018-12-30 17:24:36 -0500312static inline bool pskb_inet_may_pull(struct sk_buff *skb)
313{
314 int nhlen;
315
316 switch (skb->protocol) {
317#if IS_ENABLED(CONFIG_IPV6)
318 case htons(ETH_P_IPV6):
319 nhlen = sizeof(struct ipv6hdr);
320 break;
321#endif
322 case htons(ETH_P_IP):
323 nhlen = sizeof(struct iphdr);
324 break;
325 default:
326 nhlen = 0;
327 }
328
329 return pskb_network_may_pull(skb, nhlen);
330}
331
Tom Herbert55c2bc12016-05-18 09:06:13 -0700332static inline int ip_encap_hlen(struct ip_tunnel_encap *e)
333{
334 const struct ip_tunnel_encap_ops *ops;
335 int hlen = -EINVAL;
336
337 if (e->type == TUNNEL_ENCAP_NONE)
338 return 0;
339
340 if (e->type >= MAX_IPTUN_ENCAP_OPS)
341 return -EINVAL;
342
343 rcu_read_lock();
344 ops = rcu_dereference(iptun_encaps[e->type]);
345 if (likely(ops && ops->encap_hlen))
346 hlen = ops->encap_hlen(e);
347 rcu_read_unlock();
348
349 return hlen;
350}
351
352static inline int ip_tunnel_encap(struct sk_buff *skb, struct ip_tunnel *t,
353 u8 *protocol, struct flowi4 *fl4)
354{
355 const struct ip_tunnel_encap_ops *ops;
356 int ret = -EINVAL;
357
358 if (t->encap.type == TUNNEL_ENCAP_NONE)
359 return 0;
360
361 if (t->encap.type >= MAX_IPTUN_ENCAP_OPS)
362 return -EINVAL;
363
364 rcu_read_lock();
365 ops = rcu_dereference(iptun_encaps[t->encap.type]);
366 if (likely(ops && ops->build_header))
367 ret = ops->build_header(skb, &t->encap, protocol, fl4);
368 rcu_read_unlock();
369
370 return ret;
371}
372
Pravin B Shelarc5441932013-03-25 14:49:35 +0000373/* Extract dsfield from inner protocol */
374static inline u8 ip_tunnel_get_dsfield(const struct iphdr *iph,
375 const struct sk_buff *skb)
376{
377 if (skb->protocol == htons(ETH_P_IP))
378 return iph->tos;
379 else if (skb->protocol == htons(ETH_P_IPV6))
380 return ipv6_get_dsfield((const struct ipv6hdr *)iph);
381 else
382 return 0;
383}
384
Hangbin Liu72f6d712018-04-17 14:11:28 +0800385static inline u8 ip_tunnel_get_ttl(const struct iphdr *iph,
386 const struct sk_buff *skb)
387{
388 if (skb->protocol == htons(ETH_P_IP))
389 return iph->ttl;
390 else if (skb->protocol == htons(ETH_P_IPV6))
391 return ((const struct ipv6hdr *)iph)->hop_limit;
392 else
393 return 0;
394}
395
Pravin B Shelarc5441932013-03-25 14:49:35 +0000396/* Propogate ECN bits out */
397static inline u8 ip_tunnel_ecn_encap(u8 tos, const struct iphdr *iph,
398 const struct sk_buff *skb)
399{
400 u8 inner = ip_tunnel_get_dsfield(iph, skb);
401
402 return INET_ECN_encapsulate(tos, inner);
403}
404
Jiri Benca6d5bbf2016-04-05 14:47:12 +0200405int __iptunnel_pull_header(struct sk_buff *skb, int hdr_len,
406 __be16 inner_proto, bool raw_proto, bool xnet);
407
408static inline int iptunnel_pull_header(struct sk_buff *skb, int hdr_len,
409 __be16 inner_proto, bool xnet)
410{
411 return __iptunnel_pull_header(skb, hdr_len, inner_proto, false, xnet);
412}
413
Pravin B Shelar039f5062015-12-24 14:34:54 -0800414void iptunnel_xmit(struct sock *sk, struct rtable *rt, struct sk_buff *skb,
415 __be32 src, __be32 dst, u8 proto,
416 u8 tos, u8 ttl, __be16 df, bool xnet);
Jiri Benc63d008a2015-09-22 18:12:11 +0200417struct metadata_dst *iptunnel_metadata_reply(struct metadata_dst *md,
418 gfp_t flags);
Pravin B Shelar0e6fbc52013-06-17 17:49:56 -0700419
Alexander Duyckaed069d2016-04-14 15:33:37 -0400420int iptunnel_handle_offloads(struct sk_buff *skb, int gso_type_mask);
Eric Dumazet2d26f0a2013-10-19 11:42:55 -0700421
Jesse Grossa09a4c82016-03-19 09:32:02 -0700422static inline int iptunnel_pull_offloads(struct sk_buff *skb)
423{
424 if (skb_is_gso(skb)) {
425 int err;
426
427 err = skb_unclone(skb, GFP_ATOMIC);
428 if (unlikely(err))
429 return err;
430 skb_shinfo(skb)->gso_type &= ~(NETIF_F_GSO_ENCAP_ALL >>
431 NETIF_F_GSO_SHIFT);
432 }
433
434 skb->encapsulation = 0;
435 return 0;
436}
437
Pravin B Shelar039f5062015-12-24 14:34:54 -0800438static inline void iptunnel_xmit_stats(struct net_device *dev, int pkt_len)
Pravin B Shelarc5441932013-03-25 14:49:35 +0000439{
Pravin B Shelar039f5062015-12-24 14:34:54 -0800440 if (pkt_len > 0) {
441 struct pcpu_sw_netstats *tstats = get_cpu_ptr(dev->tstats);
Pravin B Shelarc5441932013-03-25 14:49:35 +0000442
Pravin B Shelarc5441932013-03-25 14:49:35 +0000443 u64_stats_update_begin(&tstats->syncp);
Pravin B Shelar039f5062015-12-24 14:34:54 -0800444 tstats->tx_bytes += pkt_len;
Pravin B Shelarc5441932013-03-25 14:49:35 +0000445 tstats->tx_packets++;
446 u64_stats_update_end(&tstats->syncp);
Jason A. Donenfeldb4fe85f2015-11-12 17:35:58 +0100447 put_cpu_ptr(tstats);
Pravin B Shelarc5441932013-03-25 14:49:35 +0000448 } else {
Pravin B Shelar039f5062015-12-24 14:34:54 -0800449 struct net_device_stats *err_stats = &dev->stats;
450
451 if (pkt_len < 0) {
452 err_stats->tx_errors++;
453 err_stats->tx_aborted_errors++;
454 } else {
455 err_stats->tx_dropped++;
456 }
Pravin B Shelarc5441932013-03-25 14:49:35 +0000457 }
458}
Jesse Gross5243b6a2013-06-21 16:17:11 -0700459
Pravin B Shelar4c222792015-08-30 18:09:38 -0700460static inline void *ip_tunnel_info_opts(struct ip_tunnel_info *info)
Thomas Grafee122c72015-07-21 10:43:58 +0200461{
462 return info + 1;
463}
464
Pravin B Shelar4c222792015-08-30 18:09:38 -0700465static inline void ip_tunnel_info_opts_get(void *to,
466 const struct ip_tunnel_info *info)
467{
468 memcpy(to, info + 1, info->options_len);
469}
470
471static inline void ip_tunnel_info_opts_set(struct ip_tunnel_info *info,
Pieter Jansen van Vuuren256c87c12018-06-26 21:39:36 -0700472 const void *from, int len,
473 __be16 flags)
Pravin B Shelar4c222792015-08-30 18:09:38 -0700474{
475 memcpy(ip_tunnel_info_opts(info), from, len);
476 info->options_len = len;
Pieter Jansen van Vuuren256c87c12018-06-26 21:39:36 -0700477 info->key.tun_flags |= flags;
Pravin B Shelar4c222792015-08-30 18:09:38 -0700478}
479
Thomas Graf3093fbe2015-07-21 10:44:00 +0200480static inline struct ip_tunnel_info *lwt_tun_info(struct lwtunnel_state *lwtstate)
481{
482 return (struct ip_tunnel_info *)lwtstate->data;
483}
484
Davidlohr Bueso5263a982018-05-08 09:06:58 -0700485DECLARE_STATIC_KEY_FALSE(ip_tunnel_metadata_cnt);
Thomas Grafe7030872015-07-21 10:44:01 +0200486
487/* Returns > 0 if metadata should be collected */
488static inline int ip_tunnel_collect_metadata(void)
489{
Davidlohr Bueso5263a982018-05-08 09:06:58 -0700490 return static_branch_unlikely(&ip_tunnel_metadata_cnt);
Thomas Grafe7030872015-07-21 10:44:01 +0200491}
492
Thomas Graf045a0fa2015-07-23 10:08:44 +0200493void __init ip_tunnel_core_init(void);
494
Thomas Grafe7030872015-07-21 10:44:01 +0200495void ip_tunnel_need_metadata(void);
496void ip_tunnel_unneed_metadata(void);
497
Thomas Graf05283182015-07-22 14:43:58 +0200498#else /* CONFIG_INET */
499
500static inline struct ip_tunnel_info *lwt_tun_info(struct lwtunnel_state *lwtstate)
501{
502 return NULL;
503}
504
505static inline void ip_tunnel_need_metadata(void)
506{
507}
508
509static inline void ip_tunnel_unneed_metadata(void)
510{
511}
512
Daniel Borkmanne28e87e2016-03-08 23:36:03 +0100513static inline void ip_tunnel_info_opts_get(void *to,
514 const struct ip_tunnel_info *info)
515{
516}
517
518static inline void ip_tunnel_info_opts_set(struct ip_tunnel_info *info,
Pieter Jansen van Vuuren256c87c12018-06-26 21:39:36 -0700519 const void *from, int len,
520 __be16 flags)
Daniel Borkmanne28e87e2016-03-08 23:36:03 +0100521{
522 info->options_len = 0;
Pieter Jansen van Vuuren256c87c12018-06-26 21:39:36 -0700523 info->key.tun_flags |= flags;
Daniel Borkmanne28e87e2016-03-08 23:36:03 +0100524}
525
Jesse Gross5243b6a2013-06-21 16:17:11 -0700526#endif /* CONFIG_INET */
527
Pravin B Shelarc5441932013-03-25 14:49:35 +0000528#endif /* __NET_IP_TUNNELS_H */