Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
c5441932 PS |
2 | #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> | |
7f9562a1 | 8 | #include <linux/socket.h> |
c5441932 PS |
9 | #include <linux/types.h> |
10 | #include <linux/u64_stats_sync.h> | |
fca5fdf6 DB |
11 | #include <linux/bitops.h> |
12 | ||
c5441932 PS |
13 | #include <net/dsfield.h> |
14 | #include <net/gro_cells.h> | |
15 | #include <net/inet_ecn.h> | |
56328486 | 16 | #include <net/netns/generic.h> |
c5441932 | 17 | #include <net/rtnetlink.h> |
3093fbe7 | 18 | #include <net/lwtunnel.h> |
e09acddf | 19 | #include <net/dst_cache.h> |
c5441932 PS |
20 | |
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 | ||
1d8fff90 | 30 | /* Used to memset ip_tunnel padding. */ |
376534a3 | 31 | #define IP_TUNNEL_KEY_SIZE offsetofend(struct ip_tunnel_key, tp_dst) |
1d8fff90 | 32 | |
c1ea5d67 JB |
33 | /* 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 \ | |
36 | (FIELD_SIZEOF(struct ip_tunnel_key, u) - \ | |
37 | FIELD_SIZEOF(struct ip_tunnel_key, u.ipv4)) | |
38 | ||
1d8fff90 TG |
39 | struct ip_tunnel_key { |
40 | __be64 tun_id; | |
c1ea5d67 JB |
41 | 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; | |
1d8fff90 | 51 | __be16 tun_flags; |
7c383fb2 JB |
52 | u8 tos; /* TOS for IPv4, TC for IPv6 */ |
53 | u8 ttl; /* TTL for IPv4, HL for IPv6 */ | |
13461144 | 54 | __be32 label; /* Flow Label for IPv6 */ |
1d8fff90 TG |
55 | __be16 tp_src; |
56 | __be16 tp_dst; | |
ac1cf399 | 57 | }; |
1d8fff90 | 58 | |
46fa062a JB |
59 | /* Flags for ip_tunnel_info mode. */ |
60 | #define IP_TUNNEL_INFO_TX 0x01 /* represents tx tunnel parameters */ | |
7f9562a1 | 61 | #define IP_TUNNEL_INFO_IPV6 0x02 /* key contains IPv6 addresses */ |
f35581d6 | 62 | #define IP_TUNNEL_INFO_BRIDGE 0x04 /* represents a bridged tunnel id */ |
ee122c79 | 63 | |
fca5fdf6 DB |
64 | /* Maximum tunnel options length. */ |
65 | #define IP_TUNNEL_OPTS_MAX \ | |
66 | GENMASK((FIELD_SIZEOF(struct ip_tunnel_info, \ | |
67 | options_len) * BITS_PER_BYTE) - 1, 0) | |
68 | ||
1d8fff90 TG |
69 | struct ip_tunnel_info { |
70 | struct ip_tunnel_key key; | |
d71785ff PA |
71 | #ifdef CONFIG_DST_CACHE |
72 | struct dst_cache dst_cache; | |
73 | #endif | |
1d8fff90 | 74 | u8 options_len; |
ee122c79 | 75 | u8 mode; |
1d8fff90 TG |
76 | }; |
77 | ||
c5441932 PS |
78 | /* 6rd prefix/relay information */ |
79 | #ifdef CONFIG_IPV6_SIT_6RD | |
80 | struct ip_tunnel_6rd_parm { | |
81 | struct in6_addr prefix; | |
82 | __be32 relay_prefix; | |
83 | u16 prefixlen; | |
84 | u16 relay_prefixlen; | |
85 | }; | |
86 | #endif | |
87 | ||
56328486 | 88 | struct ip_tunnel_encap { |
6b8847c5 JB |
89 | u16 type; |
90 | u16 flags; | |
56328486 TH |
91 | __be16 sport; |
92 | __be16 dport; | |
93 | }; | |
94 | ||
c5441932 PS |
95 | struct 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 | ||
2e15ea39 PS |
102 | struct metadata_dst; |
103 | ||
c5441932 PS |
104 | struct ip_tunnel { |
105 | struct ip_tunnel __rcu *next; | |
106 | struct hlist_node hash_node; | |
107 | struct net_device *dev; | |
5e6700b3 | 108 | struct net *net; /* netns for packet i/o */ |
c5441932 | 109 | |
c5441932 PS |
110 | unsigned long err_time; /* Time when the last ICMP error |
111 | * arrived */ | |
f38ba953 | 112 | int err_count; /* Number of arrived ICMP errors */ |
c5441932 PS |
113 | |
114 | /* These four fields used only by GRE */ | |
6b8847c5 JB |
115 | u32 i_seqno; /* The last seen seqno */ |
116 | u32 o_seqno; /* The last output seqno */ | |
56328486 | 117 | int tun_hlen; /* Precalculated header length */ |
c5441932 | 118 | |
84e54fe0 WT |
119 | /* This field used only by ERSPAN */ |
120 | u32 index; /* ERSPAN type II index */ | |
121 | ||
e09acddf | 122 | struct dst_cache dst_cache; |
7d442fab | 123 | |
c5441932 PS |
124 | struct ip_tunnel_parm parms; |
125 | ||
f38ba953 | 126 | int mlink; |
56328486 | 127 | int encap_hlen; /* Encap header length (FOU,GUE) */ |
56328486 | 128 | int hlen; /* tun_hlen + encap_hlen */ |
f38ba953 | 129 | struct ip_tunnel_encap encap; |
56328486 | 130 | |
c5441932 PS |
131 | /* for SIT */ |
132 | #ifdef CONFIG_IPV6_SIT_6RD | |
133 | struct ip_tunnel_6rd_parm ip6rd; | |
134 | #endif | |
135 | struct ip_tunnel_prl_entry __rcu *prl; /* potential router list */ | |
136 | unsigned int prl_count; /* # of entries in PRL */ | |
c7d03a00 | 137 | unsigned int ip_tnl_net_id; |
c5441932 | 138 | struct gro_cells gro_cells; |
9830ad4c | 139 | __u32 fwmark; |
2e15ea39 | 140 | bool collect_md; |
22a59be8 | 141 | bool ignore_df; |
c5441932 PS |
142 | }; |
143 | ||
f5796684 JG |
144 | #define TUNNEL_CSUM __cpu_to_be16(0x01) |
145 | #define TUNNEL_ROUTING __cpu_to_be16(0x02) | |
146 | #define TUNNEL_KEY __cpu_to_be16(0x04) | |
147 | #define TUNNEL_SEQ __cpu_to_be16(0x08) | |
148 | #define TUNNEL_STRICT __cpu_to_be16(0x10) | |
149 | #define TUNNEL_REC __cpu_to_be16(0x20) | |
150 | #define TUNNEL_VERSION __cpu_to_be16(0x40) | |
151 | #define TUNNEL_NO_KEY __cpu_to_be16(0x80) | |
9a628224 | 152 | #define TUNNEL_DONT_FRAGMENT __cpu_to_be16(0x0100) |
f5796684 JG |
153 | #define TUNNEL_OAM __cpu_to_be16(0x0200) |
154 | #define TUNNEL_CRIT_OPT __cpu_to_be16(0x0400) | |
1dd144cf TG |
155 | #define TUNNEL_GENEVE_OPT __cpu_to_be16(0x0800) |
156 | #define TUNNEL_VXLAN_OPT __cpu_to_be16(0x1000) | |
db3c6139 | 157 | #define TUNNEL_NOCACHE __cpu_to_be16(0x2000) |
1a66a836 | 158 | #define TUNNEL_ERSPAN_OPT __cpu_to_be16(0x4000) |
1dd144cf | 159 | |
1a66a836 WT |
160 | #define TUNNEL_OPTIONS_PRESENT \ |
161 | (TUNNEL_GENEVE_OPT | TUNNEL_VXLAN_OPT | TUNNEL_ERSPAN_OPT) | |
c5441932 PS |
162 | |
163 | struct tnl_ptk_info { | |
164 | __be16 flags; | |
165 | __be16 proto; | |
166 | __be32 key; | |
167 | __be32 seq; | |
9b8c6d7b | 168 | int hdr_len; |
c5441932 PS |
169 | }; |
170 | ||
171 | #define PACKET_RCVD 0 | |
172 | #define PACKET_REJECT 1 | |
125372fa | 173 | #define PACKET_NEXT 2 |
c5441932 | 174 | |
6261d983 | 175 | #define IP_TNL_HASH_BITS 7 |
c5441932 PS |
176 | #define IP_TNL_HASH_SIZE (1 << IP_TNL_HASH_BITS) |
177 | ||
178 | struct ip_tunnel_net { | |
c5441932 | 179 | struct net_device *fb_tunnel_dev; |
6261d983 | 180 | struct hlist_head tunnels[IP_TNL_HASH_SIZE]; |
2e15ea39 | 181 | struct ip_tunnel __rcu *collect_md_tun; |
c5441932 PS |
182 | }; |
183 | ||
4c222798 PS |
184 | static inline void ip_tunnel_key_init(struct ip_tunnel_key *key, |
185 | __be32 saddr, __be32 daddr, | |
13461144 | 186 | u8 tos, u8 ttl, __be32 label, |
4c222798 PS |
187 | __be16 tp_src, __be16 tp_dst, |
188 | __be64 tun_id, __be16 tun_flags) | |
1d8fff90 | 189 | { |
4c222798 PS |
190 | key->tun_id = tun_id; |
191 | key->u.ipv4.src = saddr; | |
192 | key->u.ipv4.dst = daddr; | |
193 | memset((unsigned char *)key + IP_TUNNEL_KEY_IPV4_PAD, | |
c1ea5d67 | 194 | 0, IP_TUNNEL_KEY_IPV4_PAD_LEN); |
4c222798 PS |
195 | key->tos = tos; |
196 | key->ttl = ttl; | |
13461144 | 197 | key->label = label; |
4c222798 | 198 | key->tun_flags = tun_flags; |
1d8fff90 TG |
199 | |
200 | /* For the tunnel types on the top of IPsec, the tp_src and tp_dst of | |
201 | * the upper tunnel are used. | |
202 | * E.g: GRE over IPSEC, the tp_src and tp_port are zero. | |
203 | */ | |
4c222798 PS |
204 | key->tp_src = tp_src; |
205 | key->tp_dst = tp_dst; | |
1d8fff90 TG |
206 | |
207 | /* Clear struct padding. */ | |
4c222798 PS |
208 | if (sizeof(*key) != IP_TUNNEL_KEY_SIZE) |
209 | memset((unsigned char *)key + IP_TUNNEL_KEY_SIZE, | |
210 | 0, sizeof(*key) - IP_TUNNEL_KEY_SIZE); | |
1d8fff90 TG |
211 | } |
212 | ||
db3c6139 DB |
213 | static inline bool |
214 | ip_tunnel_dst_cache_usable(const struct sk_buff *skb, | |
215 | const struct ip_tunnel_info *info) | |
216 | { | |
217 | if (skb->mark) | |
218 | return false; | |
219 | if (!info) | |
220 | return true; | |
221 | if (info->key.tun_flags & TUNNEL_NOCACHE) | |
222 | return false; | |
223 | ||
224 | return true; | |
225 | } | |
226 | ||
7f9562a1 JB |
227 | static inline unsigned short ip_tunnel_info_af(const struct ip_tunnel_info |
228 | *tun_info) | |
229 | { | |
230 | return tun_info->mode & IP_TUNNEL_INFO_IPV6 ? AF_INET6 : AF_INET; | |
231 | } | |
232 | ||
d817f432 AV |
233 | static inline __be64 key32_to_tunnel_id(__be32 key) |
234 | { | |
235 | #ifdef __BIG_ENDIAN | |
236 | return (__force __be64)key; | |
237 | #else | |
238 | return (__force __be64)((__force u64)key << 32); | |
239 | #endif | |
240 | } | |
241 | ||
242 | /* Returns the least-significant 32 bits of a __be64. */ | |
243 | static inline __be32 tunnel_id_to_key32(__be64 tun_id) | |
244 | { | |
245 | #ifdef __BIG_ENDIAN | |
246 | return (__force __be32)tun_id; | |
247 | #else | |
248 | return (__force __be32)((__force u64)tun_id >> 32); | |
249 | #endif | |
250 | } | |
251 | ||
5243b6ac JG |
252 | #ifdef CONFIG_INET |
253 | ||
c5441932 PS |
254 | int ip_tunnel_init(struct net_device *dev); |
255 | void ip_tunnel_uninit(struct net_device *dev); | |
256 | void ip_tunnel_dellink(struct net_device *dev, struct list_head *head); | |
1728d4fa | 257 | struct net *ip_tunnel_get_link_net(const struct net_device *dev); |
1e99584b | 258 | int ip_tunnel_get_iflink(const struct net_device *dev); |
c7d03a00 | 259 | int ip_tunnel_init_net(struct net *net, unsigned int ip_tnl_net_id, |
d3b6f614 | 260 | struct rtnl_link_ops *ops, char *devname); |
c5441932 | 261 | |
6c742e71 | 262 | void ip_tunnel_delete_net(struct ip_tunnel_net *itn, struct rtnl_link_ops *ops); |
c5441932 PS |
263 | |
264 | void ip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev, | |
bf3d6a8f | 265 | const struct iphdr *tnl_params, const u8 protocol); |
cfc7381b AS |
266 | void ip_md_tunnel_xmit(struct sk_buff *skb, struct net_device *dev, |
267 | const u8 proto); | |
c5441932 | 268 | int ip_tunnel_ioctl(struct net_device *dev, struct ip_tunnel_parm *p, int cmd); |
7e059158 | 269 | int __ip_tunnel_change_mtu(struct net_device *dev, int new_mtu, bool strict); |
c5441932 PS |
270 | int ip_tunnel_change_mtu(struct net_device *dev, int new_mtu); |
271 | ||
bc1f4470 | 272 | void ip_tunnel_get_stats64(struct net_device *dev, |
273 | struct rtnl_link_stats64 *tot); | |
c5441932 PS |
274 | struct ip_tunnel *ip_tunnel_lookup(struct ip_tunnel_net *itn, |
275 | int link, __be16 flags, | |
276 | __be32 remote, __be32 local, | |
277 | __be32 key); | |
278 | ||
279 | int ip_tunnel_rcv(struct ip_tunnel *tunnel, struct sk_buff *skb, | |
2e15ea39 PS |
280 | const struct tnl_ptk_info *tpi, struct metadata_dst *tun_dst, |
281 | bool log_ecn_error); | |
c5441932 | 282 | int ip_tunnel_changelink(struct net_device *dev, struct nlattr *tb[], |
9830ad4c | 283 | struct ip_tunnel_parm *p, __u32 fwmark); |
c5441932 | 284 | int ip_tunnel_newlink(struct net_device *dev, struct nlattr *tb[], |
9830ad4c | 285 | struct ip_tunnel_parm *p, __u32 fwmark); |
c7d03a00 | 286 | void ip_tunnel_setup(struct net_device *dev, unsigned int net_id); |
55c2bc14 TH |
287 | |
288 | struct ip_tunnel_encap_ops { | |
289 | size_t (*encap_hlen)(struct ip_tunnel_encap *e); | |
290 | int (*build_header)(struct sk_buff *skb, struct ip_tunnel_encap *e, | |
291 | u8 *protocol, struct flowi4 *fl4); | |
292 | }; | |
293 | ||
294 | #define MAX_IPTUN_ENCAP_OPS 8 | |
295 | ||
296 | extern const struct ip_tunnel_encap_ops __rcu * | |
297 | iptun_encaps[MAX_IPTUN_ENCAP_OPS]; | |
298 | ||
299 | int ip_tunnel_encap_add_ops(const struct ip_tunnel_encap_ops *op, | |
300 | unsigned int num); | |
301 | int ip_tunnel_encap_del_ops(const struct ip_tunnel_encap_ops *op, | |
302 | unsigned int num); | |
303 | ||
56328486 TH |
304 | int ip_tunnel_encap_setup(struct ip_tunnel *t, |
305 | struct ip_tunnel_encap *ipencap); | |
c5441932 | 306 | |
55c2bc14 TH |
307 | static inline int ip_encap_hlen(struct ip_tunnel_encap *e) |
308 | { | |
309 | const struct ip_tunnel_encap_ops *ops; | |
310 | int hlen = -EINVAL; | |
311 | ||
312 | if (e->type == TUNNEL_ENCAP_NONE) | |
313 | return 0; | |
314 | ||
315 | if (e->type >= MAX_IPTUN_ENCAP_OPS) | |
316 | return -EINVAL; | |
317 | ||
318 | rcu_read_lock(); | |
319 | ops = rcu_dereference(iptun_encaps[e->type]); | |
320 | if (likely(ops && ops->encap_hlen)) | |
321 | hlen = ops->encap_hlen(e); | |
322 | rcu_read_unlock(); | |
323 | ||
324 | return hlen; | |
325 | } | |
326 | ||
327 | static inline int ip_tunnel_encap(struct sk_buff *skb, struct ip_tunnel *t, | |
328 | u8 *protocol, struct flowi4 *fl4) | |
329 | { | |
330 | const struct ip_tunnel_encap_ops *ops; | |
331 | int ret = -EINVAL; | |
332 | ||
333 | if (t->encap.type == TUNNEL_ENCAP_NONE) | |
334 | return 0; | |
335 | ||
336 | if (t->encap.type >= MAX_IPTUN_ENCAP_OPS) | |
337 | return -EINVAL; | |
338 | ||
339 | rcu_read_lock(); | |
340 | ops = rcu_dereference(iptun_encaps[t->encap.type]); | |
341 | if (likely(ops && ops->build_header)) | |
342 | ret = ops->build_header(skb, &t->encap, protocol, fl4); | |
343 | rcu_read_unlock(); | |
344 | ||
345 | return ret; | |
346 | } | |
347 | ||
c5441932 PS |
348 | /* Extract dsfield from inner protocol */ |
349 | static inline u8 ip_tunnel_get_dsfield(const struct iphdr *iph, | |
350 | const struct sk_buff *skb) | |
351 | { | |
352 | if (skb->protocol == htons(ETH_P_IP)) | |
353 | return iph->tos; | |
354 | else if (skb->protocol == htons(ETH_P_IPV6)) | |
355 | return ipv6_get_dsfield((const struct ipv6hdr *)iph); | |
356 | else | |
357 | return 0; | |
358 | } | |
359 | ||
360 | /* Propogate ECN bits out */ | |
361 | static inline u8 ip_tunnel_ecn_encap(u8 tos, const struct iphdr *iph, | |
362 | const struct sk_buff *skb) | |
363 | { | |
364 | u8 inner = ip_tunnel_get_dsfield(iph, skb); | |
365 | ||
366 | return INET_ECN_encapsulate(tos, inner); | |
367 | } | |
368 | ||
a6d5bbf3 JB |
369 | int __iptunnel_pull_header(struct sk_buff *skb, int hdr_len, |
370 | __be16 inner_proto, bool raw_proto, bool xnet); | |
371 | ||
372 | static inline int iptunnel_pull_header(struct sk_buff *skb, int hdr_len, | |
373 | __be16 inner_proto, bool xnet) | |
374 | { | |
375 | return __iptunnel_pull_header(skb, hdr_len, inner_proto, false, xnet); | |
376 | } | |
377 | ||
039f5062 PS |
378 | void iptunnel_xmit(struct sock *sk, struct rtable *rt, struct sk_buff *skb, |
379 | __be32 src, __be32 dst, u8 proto, | |
380 | u8 tos, u8 ttl, __be16 df, bool xnet); | |
63d008a4 JB |
381 | struct metadata_dst *iptunnel_metadata_reply(struct metadata_dst *md, |
382 | gfp_t flags); | |
0e6fbc5b | 383 | |
aed069df | 384 | int iptunnel_handle_offloads(struct sk_buff *skb, int gso_type_mask); |
2d26f0a3 | 385 | |
a09a4c8d JG |
386 | static inline int iptunnel_pull_offloads(struct sk_buff *skb) |
387 | { | |
388 | if (skb_is_gso(skb)) { | |
389 | int err; | |
390 | ||
391 | err = skb_unclone(skb, GFP_ATOMIC); | |
392 | if (unlikely(err)) | |
393 | return err; | |
394 | skb_shinfo(skb)->gso_type &= ~(NETIF_F_GSO_ENCAP_ALL >> | |
395 | NETIF_F_GSO_SHIFT); | |
396 | } | |
397 | ||
398 | skb->encapsulation = 0; | |
399 | return 0; | |
400 | } | |
401 | ||
039f5062 | 402 | static inline void iptunnel_xmit_stats(struct net_device *dev, int pkt_len) |
c5441932 | 403 | { |
039f5062 PS |
404 | if (pkt_len > 0) { |
405 | struct pcpu_sw_netstats *tstats = get_cpu_ptr(dev->tstats); | |
c5441932 | 406 | |
c5441932 | 407 | u64_stats_update_begin(&tstats->syncp); |
039f5062 | 408 | tstats->tx_bytes += pkt_len; |
c5441932 PS |
409 | tstats->tx_packets++; |
410 | u64_stats_update_end(&tstats->syncp); | |
b4fe85f9 | 411 | put_cpu_ptr(tstats); |
c5441932 | 412 | } else { |
039f5062 PS |
413 | struct net_device_stats *err_stats = &dev->stats; |
414 | ||
415 | if (pkt_len < 0) { | |
416 | err_stats->tx_errors++; | |
417 | err_stats->tx_aborted_errors++; | |
418 | } else { | |
419 | err_stats->tx_dropped++; | |
420 | } | |
c5441932 PS |
421 | } |
422 | } | |
5243b6ac | 423 | |
4c222798 | 424 | static inline void *ip_tunnel_info_opts(struct ip_tunnel_info *info) |
ee122c79 TG |
425 | { |
426 | return info + 1; | |
427 | } | |
428 | ||
4c222798 PS |
429 | static inline void ip_tunnel_info_opts_get(void *to, |
430 | const struct ip_tunnel_info *info) | |
431 | { | |
432 | memcpy(to, info + 1, info->options_len); | |
433 | } | |
434 | ||
435 | static inline void ip_tunnel_info_opts_set(struct ip_tunnel_info *info, | |
436 | const void *from, int len) | |
437 | { | |
438 | memcpy(ip_tunnel_info_opts(info), from, len); | |
439 | info->options_len = len; | |
440 | } | |
441 | ||
3093fbe7 TG |
442 | static inline struct ip_tunnel_info *lwt_tun_info(struct lwtunnel_state *lwtstate) |
443 | { | |
444 | return (struct ip_tunnel_info *)lwtstate->data; | |
445 | } | |
446 | ||
e7030878 TG |
447 | extern struct static_key ip_tunnel_metadata_cnt; |
448 | ||
449 | /* Returns > 0 if metadata should be collected */ | |
450 | static inline int ip_tunnel_collect_metadata(void) | |
451 | { | |
452 | return static_key_false(&ip_tunnel_metadata_cnt); | |
453 | } | |
454 | ||
045a0fa0 TG |
455 | void __init ip_tunnel_core_init(void); |
456 | ||
e7030878 TG |
457 | void ip_tunnel_need_metadata(void); |
458 | void ip_tunnel_unneed_metadata(void); | |
459 | ||
05283187 TG |
460 | #else /* CONFIG_INET */ |
461 | ||
462 | static inline struct ip_tunnel_info *lwt_tun_info(struct lwtunnel_state *lwtstate) | |
463 | { | |
464 | return NULL; | |
465 | } | |
466 | ||
467 | static inline void ip_tunnel_need_metadata(void) | |
468 | { | |
469 | } | |
470 | ||
471 | static inline void ip_tunnel_unneed_metadata(void) | |
472 | { | |
473 | } | |
474 | ||
e28e87ed DB |
475 | static inline void ip_tunnel_info_opts_get(void *to, |
476 | const struct ip_tunnel_info *info) | |
477 | { | |
478 | } | |
479 | ||
480 | static inline void ip_tunnel_info_opts_set(struct ip_tunnel_info *info, | |
481 | const void *from, int len) | |
482 | { | |
483 | info->options_len = 0; | |
484 | } | |
485 | ||
5243b6ac JG |
486 | #endif /* CONFIG_INET */ |
487 | ||
c5441932 | 488 | #endif /* __NET_IP_TUNNELS_H */ |