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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 | 102 | struct metadata_dst; |
55ff02b2 JV |
103 | /* A fan overlay /8 (250.0.0.0/8, for example) maps to exactly one /16 |
104 | * underlay (10.88.0.0/16, for example). Multiple local addresses within | |
105 | * the /16 may be used, but a particular overlay may not span | |
106 | * multiple underlay subnets. | |
107 | * | |
108 | * We store one underlay, indexed by the overlay's high order octet. | |
109 | */ | |
110 | #define FAN_OVERLAY_CNT 256 | |
111 | ||
d57420a1 JV |
112 | struct ip_fan_map { |
113 | __be32 underlay; | |
114 | __be32 overlay; | |
115 | u16 underlay_prefix; | |
116 | u16 overlay_prefix; | |
117 | u32 overlay_mask; | |
118 | struct list_head list; | |
119 | struct rcu_head rcu; | |
120 | }; | |
121 | ||
55ff02b2 | 122 | struct ip_tunnel_fan { |
d57420a1 | 123 | struct list_head fan_maps; |
55ff02b2 | 124 | }; |
2e15ea39 | 125 | |
c5441932 PS |
126 | struct ip_tunnel { |
127 | struct ip_tunnel __rcu *next; | |
128 | struct hlist_node hash_node; | |
129 | struct net_device *dev; | |
5e6700b3 | 130 | struct net *net; /* netns for packet i/o */ |
c5441932 | 131 | |
c5441932 PS |
132 | unsigned long err_time; /* Time when the last ICMP error |
133 | * arrived */ | |
f38ba953 | 134 | int err_count; /* Number of arrived ICMP errors */ |
c5441932 PS |
135 | |
136 | /* These four fields used only by GRE */ | |
6b8847c5 JB |
137 | u32 i_seqno; /* The last seen seqno */ |
138 | u32 o_seqno; /* The last output seqno */ | |
56328486 | 139 | int tun_hlen; /* Precalculated header length */ |
c5441932 | 140 | |
84e54fe0 WT |
141 | /* This field used only by ERSPAN */ |
142 | u32 index; /* ERSPAN type II index */ | |
143 | ||
e09acddf | 144 | struct dst_cache dst_cache; |
7d442fab | 145 | |
c5441932 PS |
146 | struct ip_tunnel_parm parms; |
147 | ||
f38ba953 | 148 | int mlink; |
56328486 | 149 | int encap_hlen; /* Encap header length (FOU,GUE) */ |
56328486 | 150 | int hlen; /* tun_hlen + encap_hlen */ |
f38ba953 | 151 | struct ip_tunnel_encap encap; |
56328486 | 152 | |
c5441932 PS |
153 | /* for SIT */ |
154 | #ifdef CONFIG_IPV6_SIT_6RD | |
155 | struct ip_tunnel_6rd_parm ip6rd; | |
156 | #endif | |
157 | struct ip_tunnel_prl_entry __rcu *prl; /* potential router list */ | |
158 | unsigned int prl_count; /* # of entries in PRL */ | |
55ff02b2 | 159 | struct ip_tunnel_fan fan; |
c7d03a00 | 160 | unsigned int ip_tnl_net_id; |
c5441932 | 161 | struct gro_cells gro_cells; |
9830ad4c | 162 | __u32 fwmark; |
2e15ea39 | 163 | bool collect_md; |
22a59be8 | 164 | bool ignore_df; |
c5441932 PS |
165 | }; |
166 | ||
f5796684 JG |
167 | #define TUNNEL_CSUM __cpu_to_be16(0x01) |
168 | #define TUNNEL_ROUTING __cpu_to_be16(0x02) | |
169 | #define TUNNEL_KEY __cpu_to_be16(0x04) | |
170 | #define TUNNEL_SEQ __cpu_to_be16(0x08) | |
171 | #define TUNNEL_STRICT __cpu_to_be16(0x10) | |
172 | #define TUNNEL_REC __cpu_to_be16(0x20) | |
173 | #define TUNNEL_VERSION __cpu_to_be16(0x40) | |
174 | #define TUNNEL_NO_KEY __cpu_to_be16(0x80) | |
9a628224 | 175 | #define TUNNEL_DONT_FRAGMENT __cpu_to_be16(0x0100) |
f5796684 JG |
176 | #define TUNNEL_OAM __cpu_to_be16(0x0200) |
177 | #define TUNNEL_CRIT_OPT __cpu_to_be16(0x0400) | |
1dd144cf TG |
178 | #define TUNNEL_GENEVE_OPT __cpu_to_be16(0x0800) |
179 | #define TUNNEL_VXLAN_OPT __cpu_to_be16(0x1000) | |
db3c6139 | 180 | #define TUNNEL_NOCACHE __cpu_to_be16(0x2000) |
1a66a836 | 181 | #define TUNNEL_ERSPAN_OPT __cpu_to_be16(0x4000) |
1dd144cf | 182 | |
1a66a836 WT |
183 | #define TUNNEL_OPTIONS_PRESENT \ |
184 | (TUNNEL_GENEVE_OPT | TUNNEL_VXLAN_OPT | TUNNEL_ERSPAN_OPT) | |
d57420a1 JV |
185 | |
186 | static inline int fan_has_map(const struct ip_tunnel_fan *fan) | |
187 | { | |
188 | return !list_empty(&fan->fan_maps); | |
189 | } | |
c5441932 PS |
190 | |
191 | struct tnl_ptk_info { | |
192 | __be16 flags; | |
193 | __be16 proto; | |
194 | __be32 key; | |
195 | __be32 seq; | |
9b8c6d7b | 196 | int hdr_len; |
c5441932 PS |
197 | }; |
198 | ||
199 | #define PACKET_RCVD 0 | |
200 | #define PACKET_REJECT 1 | |
125372fa | 201 | #define PACKET_NEXT 2 |
c5441932 | 202 | |
6261d983 | 203 | #define IP_TNL_HASH_BITS 7 |
c5441932 PS |
204 | #define IP_TNL_HASH_SIZE (1 << IP_TNL_HASH_BITS) |
205 | ||
206 | struct ip_tunnel_net { | |
c5441932 | 207 | struct net_device *fb_tunnel_dev; |
6261d983 | 208 | struct hlist_head tunnels[IP_TNL_HASH_SIZE]; |
2e15ea39 | 209 | struct ip_tunnel __rcu *collect_md_tun; |
c5441932 PS |
210 | }; |
211 | ||
4c222798 PS |
212 | static inline void ip_tunnel_key_init(struct ip_tunnel_key *key, |
213 | __be32 saddr, __be32 daddr, | |
13461144 | 214 | u8 tos, u8 ttl, __be32 label, |
4c222798 PS |
215 | __be16 tp_src, __be16 tp_dst, |
216 | __be64 tun_id, __be16 tun_flags) | |
1d8fff90 | 217 | { |
4c222798 PS |
218 | key->tun_id = tun_id; |
219 | key->u.ipv4.src = saddr; | |
220 | key->u.ipv4.dst = daddr; | |
221 | memset((unsigned char *)key + IP_TUNNEL_KEY_IPV4_PAD, | |
c1ea5d67 | 222 | 0, IP_TUNNEL_KEY_IPV4_PAD_LEN); |
4c222798 PS |
223 | key->tos = tos; |
224 | key->ttl = ttl; | |
13461144 | 225 | key->label = label; |
4c222798 | 226 | key->tun_flags = tun_flags; |
1d8fff90 TG |
227 | |
228 | /* For the tunnel types on the top of IPsec, the tp_src and tp_dst of | |
229 | * the upper tunnel are used. | |
230 | * E.g: GRE over IPSEC, the tp_src and tp_port are zero. | |
231 | */ | |
4c222798 PS |
232 | key->tp_src = tp_src; |
233 | key->tp_dst = tp_dst; | |
1d8fff90 TG |
234 | |
235 | /* Clear struct padding. */ | |
4c222798 PS |
236 | if (sizeof(*key) != IP_TUNNEL_KEY_SIZE) |
237 | memset((unsigned char *)key + IP_TUNNEL_KEY_SIZE, | |
238 | 0, sizeof(*key) - IP_TUNNEL_KEY_SIZE); | |
1d8fff90 TG |
239 | } |
240 | ||
db3c6139 DB |
241 | static inline bool |
242 | ip_tunnel_dst_cache_usable(const struct sk_buff *skb, | |
243 | const struct ip_tunnel_info *info) | |
244 | { | |
245 | if (skb->mark) | |
246 | return false; | |
247 | if (!info) | |
248 | return true; | |
249 | if (info->key.tun_flags & TUNNEL_NOCACHE) | |
250 | return false; | |
251 | ||
252 | return true; | |
253 | } | |
254 | ||
7f9562a1 JB |
255 | static inline unsigned short ip_tunnel_info_af(const struct ip_tunnel_info |
256 | *tun_info) | |
257 | { | |
258 | return tun_info->mode & IP_TUNNEL_INFO_IPV6 ? AF_INET6 : AF_INET; | |
259 | } | |
260 | ||
d817f432 AV |
261 | static inline __be64 key32_to_tunnel_id(__be32 key) |
262 | { | |
263 | #ifdef __BIG_ENDIAN | |
264 | return (__force __be64)key; | |
265 | #else | |
266 | return (__force __be64)((__force u64)key << 32); | |
267 | #endif | |
268 | } | |
269 | ||
270 | /* Returns the least-significant 32 bits of a __be64. */ | |
271 | static inline __be32 tunnel_id_to_key32(__be64 tun_id) | |
272 | { | |
273 | #ifdef __BIG_ENDIAN | |
274 | return (__force __be32)tun_id; | |
275 | #else | |
276 | return (__force __be32)((__force u64)tun_id >> 32); | |
277 | #endif | |
278 | } | |
279 | ||
5243b6ac JG |
280 | #ifdef CONFIG_INET |
281 | ||
c5441932 PS |
282 | int ip_tunnel_init(struct net_device *dev); |
283 | void ip_tunnel_uninit(struct net_device *dev); | |
284 | void ip_tunnel_dellink(struct net_device *dev, struct list_head *head); | |
1728d4fa | 285 | struct net *ip_tunnel_get_link_net(const struct net_device *dev); |
1e99584b | 286 | int ip_tunnel_get_iflink(const struct net_device *dev); |
c7d03a00 | 287 | int ip_tunnel_init_net(struct net *net, unsigned int ip_tnl_net_id, |
d3b6f614 | 288 | struct rtnl_link_ops *ops, char *devname); |
c5441932 | 289 | |
64bc1781 ED |
290 | void ip_tunnel_delete_nets(struct list_head *list_net, unsigned int id, |
291 | struct rtnl_link_ops *ops); | |
c5441932 PS |
292 | |
293 | void ip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev, | |
bf3d6a8f | 294 | const struct iphdr *tnl_params, const u8 protocol); |
cfc7381b AS |
295 | void ip_md_tunnel_xmit(struct sk_buff *skb, struct net_device *dev, |
296 | const u8 proto); | |
c5441932 | 297 | int ip_tunnel_ioctl(struct net_device *dev, struct ip_tunnel_parm *p, int cmd); |
7e059158 | 298 | int __ip_tunnel_change_mtu(struct net_device *dev, int new_mtu, bool strict); |
c5441932 PS |
299 | int ip_tunnel_change_mtu(struct net_device *dev, int new_mtu); |
300 | ||
bc1f4470 | 301 | void ip_tunnel_get_stats64(struct net_device *dev, |
302 | struct rtnl_link_stats64 *tot); | |
c5441932 PS |
303 | struct ip_tunnel *ip_tunnel_lookup(struct ip_tunnel_net *itn, |
304 | int link, __be16 flags, | |
305 | __be32 remote, __be32 local, | |
306 | __be32 key); | |
307 | ||
308 | int ip_tunnel_rcv(struct ip_tunnel *tunnel, struct sk_buff *skb, | |
2e15ea39 PS |
309 | const struct tnl_ptk_info *tpi, struct metadata_dst *tun_dst, |
310 | bool log_ecn_error); | |
c5441932 | 311 | int ip_tunnel_changelink(struct net_device *dev, struct nlattr *tb[], |
9830ad4c | 312 | struct ip_tunnel_parm *p, __u32 fwmark); |
c5441932 | 313 | int ip_tunnel_newlink(struct net_device *dev, struct nlattr *tb[], |
9830ad4c | 314 | struct ip_tunnel_parm *p, __u32 fwmark); |
c7d03a00 | 315 | void ip_tunnel_setup(struct net_device *dev, unsigned int net_id); |
55c2bc14 TH |
316 | |
317 | struct ip_tunnel_encap_ops { | |
318 | size_t (*encap_hlen)(struct ip_tunnel_encap *e); | |
319 | int (*build_header)(struct sk_buff *skb, struct ip_tunnel_encap *e, | |
320 | u8 *protocol, struct flowi4 *fl4); | |
321 | }; | |
322 | ||
323 | #define MAX_IPTUN_ENCAP_OPS 8 | |
324 | ||
325 | extern const struct ip_tunnel_encap_ops __rcu * | |
326 | iptun_encaps[MAX_IPTUN_ENCAP_OPS]; | |
327 | ||
328 | int ip_tunnel_encap_add_ops(const struct ip_tunnel_encap_ops *op, | |
329 | unsigned int num); | |
330 | int ip_tunnel_encap_del_ops(const struct ip_tunnel_encap_ops *op, | |
331 | unsigned int num); | |
332 | ||
56328486 TH |
333 | int ip_tunnel_encap_setup(struct ip_tunnel *t, |
334 | struct ip_tunnel_encap *ipencap); | |
c5441932 | 335 | |
55c2bc14 TH |
336 | static inline int ip_encap_hlen(struct ip_tunnel_encap *e) |
337 | { | |
338 | const struct ip_tunnel_encap_ops *ops; | |
339 | int hlen = -EINVAL; | |
340 | ||
341 | if (e->type == TUNNEL_ENCAP_NONE) | |
342 | return 0; | |
343 | ||
344 | if (e->type >= MAX_IPTUN_ENCAP_OPS) | |
345 | return -EINVAL; | |
346 | ||
347 | rcu_read_lock(); | |
348 | ops = rcu_dereference(iptun_encaps[e->type]); | |
349 | if (likely(ops && ops->encap_hlen)) | |
350 | hlen = ops->encap_hlen(e); | |
351 | rcu_read_unlock(); | |
352 | ||
353 | return hlen; | |
354 | } | |
355 | ||
356 | static inline int ip_tunnel_encap(struct sk_buff *skb, struct ip_tunnel *t, | |
357 | u8 *protocol, struct flowi4 *fl4) | |
358 | { | |
359 | const struct ip_tunnel_encap_ops *ops; | |
360 | int ret = -EINVAL; | |
361 | ||
362 | if (t->encap.type == TUNNEL_ENCAP_NONE) | |
363 | return 0; | |
364 | ||
365 | if (t->encap.type >= MAX_IPTUN_ENCAP_OPS) | |
366 | return -EINVAL; | |
367 | ||
368 | rcu_read_lock(); | |
369 | ops = rcu_dereference(iptun_encaps[t->encap.type]); | |
370 | if (likely(ops && ops->build_header)) | |
371 | ret = ops->build_header(skb, &t->encap, protocol, fl4); | |
372 | rcu_read_unlock(); | |
373 | ||
374 | return ret; | |
375 | } | |
376 | ||
c5441932 PS |
377 | /* Extract dsfield from inner protocol */ |
378 | static inline u8 ip_tunnel_get_dsfield(const struct iphdr *iph, | |
379 | const struct sk_buff *skb) | |
380 | { | |
381 | if (skb->protocol == htons(ETH_P_IP)) | |
382 | return iph->tos; | |
383 | else if (skb->protocol == htons(ETH_P_IPV6)) | |
384 | return ipv6_get_dsfield((const struct ipv6hdr *)iph); | |
385 | else | |
386 | return 0; | |
387 | } | |
388 | ||
389 | /* Propogate ECN bits out */ | |
390 | static inline u8 ip_tunnel_ecn_encap(u8 tos, const struct iphdr *iph, | |
391 | const struct sk_buff *skb) | |
392 | { | |
393 | u8 inner = ip_tunnel_get_dsfield(iph, skb); | |
394 | ||
395 | return INET_ECN_encapsulate(tos, inner); | |
396 | } | |
397 | ||
a6d5bbf3 JB |
398 | int __iptunnel_pull_header(struct sk_buff *skb, int hdr_len, |
399 | __be16 inner_proto, bool raw_proto, bool xnet); | |
400 | ||
401 | static inline int iptunnel_pull_header(struct sk_buff *skb, int hdr_len, | |
402 | __be16 inner_proto, bool xnet) | |
403 | { | |
404 | return __iptunnel_pull_header(skb, hdr_len, inner_proto, false, xnet); | |
405 | } | |
406 | ||
039f5062 PS |
407 | void iptunnel_xmit(struct sock *sk, struct rtable *rt, struct sk_buff *skb, |
408 | __be32 src, __be32 dst, u8 proto, | |
409 | u8 tos, u8 ttl, __be16 df, bool xnet); | |
63d008a4 JB |
410 | struct metadata_dst *iptunnel_metadata_reply(struct metadata_dst *md, |
411 | gfp_t flags); | |
0e6fbc5b | 412 | |
aed069df | 413 | int iptunnel_handle_offloads(struct sk_buff *skb, int gso_type_mask); |
2d26f0a3 | 414 | |
a09a4c8d JG |
415 | static inline int iptunnel_pull_offloads(struct sk_buff *skb) |
416 | { | |
417 | if (skb_is_gso(skb)) { | |
418 | int err; | |
419 | ||
420 | err = skb_unclone(skb, GFP_ATOMIC); | |
421 | if (unlikely(err)) | |
422 | return err; | |
423 | skb_shinfo(skb)->gso_type &= ~(NETIF_F_GSO_ENCAP_ALL >> | |
424 | NETIF_F_GSO_SHIFT); | |
425 | } | |
426 | ||
427 | skb->encapsulation = 0; | |
428 | return 0; | |
429 | } | |
430 | ||
039f5062 | 431 | static inline void iptunnel_xmit_stats(struct net_device *dev, int pkt_len) |
c5441932 | 432 | { |
039f5062 PS |
433 | if (pkt_len > 0) { |
434 | struct pcpu_sw_netstats *tstats = get_cpu_ptr(dev->tstats); | |
c5441932 | 435 | |
c5441932 | 436 | u64_stats_update_begin(&tstats->syncp); |
039f5062 | 437 | tstats->tx_bytes += pkt_len; |
c5441932 PS |
438 | tstats->tx_packets++; |
439 | u64_stats_update_end(&tstats->syncp); | |
b4fe85f9 | 440 | put_cpu_ptr(tstats); |
c5441932 | 441 | } else { |
039f5062 PS |
442 | struct net_device_stats *err_stats = &dev->stats; |
443 | ||
444 | if (pkt_len < 0) { | |
445 | err_stats->tx_errors++; | |
446 | err_stats->tx_aborted_errors++; | |
447 | } else { | |
448 | err_stats->tx_dropped++; | |
449 | } | |
c5441932 PS |
450 | } |
451 | } | |
5243b6ac | 452 | |
4c222798 | 453 | static inline void *ip_tunnel_info_opts(struct ip_tunnel_info *info) |
ee122c79 TG |
454 | { |
455 | return info + 1; | |
456 | } | |
457 | ||
4c222798 PS |
458 | static inline void ip_tunnel_info_opts_get(void *to, |
459 | const struct ip_tunnel_info *info) | |
460 | { | |
461 | memcpy(to, info + 1, info->options_len); | |
462 | } | |
463 | ||
464 | static inline void ip_tunnel_info_opts_set(struct ip_tunnel_info *info, | |
465 | const void *from, int len) | |
466 | { | |
467 | memcpy(ip_tunnel_info_opts(info), from, len); | |
468 | info->options_len = len; | |
469 | } | |
470 | ||
3093fbe7 TG |
471 | static inline struct ip_tunnel_info *lwt_tun_info(struct lwtunnel_state *lwtstate) |
472 | { | |
473 | return (struct ip_tunnel_info *)lwtstate->data; | |
474 | } | |
475 | ||
e7030878 TG |
476 | extern struct static_key ip_tunnel_metadata_cnt; |
477 | ||
478 | /* Returns > 0 if metadata should be collected */ | |
479 | static inline int ip_tunnel_collect_metadata(void) | |
480 | { | |
481 | return static_key_false(&ip_tunnel_metadata_cnt); | |
482 | } | |
483 | ||
045a0fa0 TG |
484 | void __init ip_tunnel_core_init(void); |
485 | ||
e7030878 TG |
486 | void ip_tunnel_need_metadata(void); |
487 | void ip_tunnel_unneed_metadata(void); | |
488 | ||
05283187 TG |
489 | #else /* CONFIG_INET */ |
490 | ||
491 | static inline struct ip_tunnel_info *lwt_tun_info(struct lwtunnel_state *lwtstate) | |
492 | { | |
493 | return NULL; | |
494 | } | |
495 | ||
496 | static inline void ip_tunnel_need_metadata(void) | |
497 | { | |
498 | } | |
499 | ||
500 | static inline void ip_tunnel_unneed_metadata(void) | |
501 | { | |
502 | } | |
503 | ||
e28e87ed DB |
504 | static inline void ip_tunnel_info_opts_get(void *to, |
505 | const struct ip_tunnel_info *info) | |
506 | { | |
507 | } | |
508 | ||
509 | static inline void ip_tunnel_info_opts_set(struct ip_tunnel_info *info, | |
510 | const void *from, int len) | |
511 | { | |
512 | info->options_len = 0; | |
513 | } | |
514 | ||
5243b6ac JG |
515 | #endif /* CONFIG_INET */ |
516 | ||
c5441932 | 517 | #endif /* __NET_IP_TUNNELS_H */ |