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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 | |
f551c91d | 119 | /* These four fields used only by ERSPAN */ |
84e54fe0 | 120 | u32 index; /* ERSPAN type II index */ |
f551c91d WT |
121 | u8 erspan_ver; /* ERSPAN version */ |
122 | u8 dir; /* ERSPAN direction */ | |
123 | u16 hwid; /* ERSPAN hardware ID */ | |
84e54fe0 | 124 | |
e09acddf | 125 | struct dst_cache dst_cache; |
7d442fab | 126 | |
c5441932 PS |
127 | struct ip_tunnel_parm parms; |
128 | ||
f38ba953 | 129 | int mlink; |
56328486 | 130 | int encap_hlen; /* Encap header length (FOU,GUE) */ |
56328486 | 131 | int hlen; /* tun_hlen + encap_hlen */ |
f38ba953 | 132 | struct ip_tunnel_encap encap; |
56328486 | 133 | |
c5441932 PS |
134 | /* 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 */ | |
c7d03a00 | 140 | unsigned int ip_tnl_net_id; |
c5441932 | 141 | struct gro_cells gro_cells; |
9830ad4c | 142 | __u32 fwmark; |
2e15ea39 | 143 | bool collect_md; |
22a59be8 | 144 | bool ignore_df; |
c5441932 PS |
145 | }; |
146 | ||
f5796684 JG |
147 | #define TUNNEL_CSUM __cpu_to_be16(0x01) |
148 | #define TUNNEL_ROUTING __cpu_to_be16(0x02) | |
149 | #define TUNNEL_KEY __cpu_to_be16(0x04) | |
150 | #define TUNNEL_SEQ __cpu_to_be16(0x08) | |
151 | #define TUNNEL_STRICT __cpu_to_be16(0x10) | |
152 | #define TUNNEL_REC __cpu_to_be16(0x20) | |
153 | #define TUNNEL_VERSION __cpu_to_be16(0x40) | |
154 | #define TUNNEL_NO_KEY __cpu_to_be16(0x80) | |
9a628224 | 155 | #define TUNNEL_DONT_FRAGMENT __cpu_to_be16(0x0100) |
f5796684 JG |
156 | #define TUNNEL_OAM __cpu_to_be16(0x0200) |
157 | #define TUNNEL_CRIT_OPT __cpu_to_be16(0x0400) | |
1dd144cf TG |
158 | #define TUNNEL_GENEVE_OPT __cpu_to_be16(0x0800) |
159 | #define TUNNEL_VXLAN_OPT __cpu_to_be16(0x1000) | |
db3c6139 | 160 | #define TUNNEL_NOCACHE __cpu_to_be16(0x2000) |
1a66a836 | 161 | #define TUNNEL_ERSPAN_OPT __cpu_to_be16(0x4000) |
1dd144cf | 162 | |
1a66a836 WT |
163 | #define TUNNEL_OPTIONS_PRESENT \ |
164 | (TUNNEL_GENEVE_OPT | TUNNEL_VXLAN_OPT | TUNNEL_ERSPAN_OPT) | |
c5441932 PS |
165 | |
166 | struct tnl_ptk_info { | |
167 | __be16 flags; | |
168 | __be16 proto; | |
169 | __be32 key; | |
170 | __be32 seq; | |
9b8c6d7b | 171 | int hdr_len; |
c5441932 PS |
172 | }; |
173 | ||
174 | #define PACKET_RCVD 0 | |
175 | #define PACKET_REJECT 1 | |
125372fa | 176 | #define PACKET_NEXT 2 |
c5441932 | 177 | |
6261d983 | 178 | #define IP_TNL_HASH_BITS 7 |
c5441932 PS |
179 | #define IP_TNL_HASH_SIZE (1 << IP_TNL_HASH_BITS) |
180 | ||
181 | struct ip_tunnel_net { | |
c5441932 | 182 | struct net_device *fb_tunnel_dev; |
79134e6c | 183 | struct rtnl_link_ops *rtnl_link_ops; |
6261d983 | 184 | struct hlist_head tunnels[IP_TNL_HASH_SIZE]; |
2e15ea39 | 185 | struct ip_tunnel __rcu *collect_md_tun; |
79134e6c | 186 | int type; |
c5441932 PS |
187 | }; |
188 | ||
4c222798 PS |
189 | static inline void ip_tunnel_key_init(struct ip_tunnel_key *key, |
190 | __be32 saddr, __be32 daddr, | |
13461144 | 191 | u8 tos, u8 ttl, __be32 label, |
4c222798 PS |
192 | __be16 tp_src, __be16 tp_dst, |
193 | __be64 tun_id, __be16 tun_flags) | |
1d8fff90 | 194 | { |
4c222798 PS |
195 | key->tun_id = tun_id; |
196 | key->u.ipv4.src = saddr; | |
197 | key->u.ipv4.dst = daddr; | |
198 | memset((unsigned char *)key + IP_TUNNEL_KEY_IPV4_PAD, | |
c1ea5d67 | 199 | 0, IP_TUNNEL_KEY_IPV4_PAD_LEN); |
4c222798 PS |
200 | key->tos = tos; |
201 | key->ttl = ttl; | |
13461144 | 202 | key->label = label; |
4c222798 | 203 | key->tun_flags = tun_flags; |
1d8fff90 TG |
204 | |
205 | /* For the tunnel types on the top of IPsec, the tp_src and tp_dst of | |
206 | * the upper tunnel are used. | |
207 | * E.g: GRE over IPSEC, the tp_src and tp_port are zero. | |
208 | */ | |
4c222798 PS |
209 | key->tp_src = tp_src; |
210 | key->tp_dst = tp_dst; | |
1d8fff90 TG |
211 | |
212 | /* Clear struct padding. */ | |
4c222798 PS |
213 | if (sizeof(*key) != IP_TUNNEL_KEY_SIZE) |
214 | memset((unsigned char *)key + IP_TUNNEL_KEY_SIZE, | |
215 | 0, sizeof(*key) - IP_TUNNEL_KEY_SIZE); | |
1d8fff90 TG |
216 | } |
217 | ||
db3c6139 DB |
218 | static inline bool |
219 | ip_tunnel_dst_cache_usable(const struct sk_buff *skb, | |
220 | const struct ip_tunnel_info *info) | |
221 | { | |
222 | if (skb->mark) | |
223 | return false; | |
224 | if (!info) | |
225 | return true; | |
226 | if (info->key.tun_flags & TUNNEL_NOCACHE) | |
227 | return false; | |
228 | ||
229 | return true; | |
230 | } | |
231 | ||
7f9562a1 JB |
232 | static inline unsigned short ip_tunnel_info_af(const struct ip_tunnel_info |
233 | *tun_info) | |
234 | { | |
235 | return tun_info->mode & IP_TUNNEL_INFO_IPV6 ? AF_INET6 : AF_INET; | |
236 | } | |
237 | ||
d817f432 AV |
238 | static inline __be64 key32_to_tunnel_id(__be32 key) |
239 | { | |
240 | #ifdef __BIG_ENDIAN | |
241 | return (__force __be64)key; | |
242 | #else | |
243 | return (__force __be64)((__force u64)key << 32); | |
244 | #endif | |
245 | } | |
246 | ||
247 | /* Returns the least-significant 32 bits of a __be64. */ | |
248 | static inline __be32 tunnel_id_to_key32(__be64 tun_id) | |
249 | { | |
250 | #ifdef __BIG_ENDIAN | |
251 | return (__force __be32)tun_id; | |
252 | #else | |
253 | return (__force __be32)((__force u64)tun_id >> 32); | |
254 | #endif | |
255 | } | |
256 | ||
5243b6ac JG |
257 | #ifdef CONFIG_INET |
258 | ||
b0066da5 PM |
259 | static inline void ip_tunnel_init_flow(struct flowi4 *fl4, |
260 | int proto, | |
261 | __be32 daddr, __be32 saddr, | |
262 | __be32 key, __u8 tos, int oif, | |
263 | __u32 mark) | |
264 | { | |
265 | memset(fl4, 0, sizeof(*fl4)); | |
266 | fl4->flowi4_oif = oif; | |
267 | fl4->daddr = daddr; | |
268 | fl4->saddr = saddr; | |
269 | fl4->flowi4_tos = tos; | |
270 | fl4->flowi4_proto = proto; | |
271 | fl4->fl4_gre_key = key; | |
272 | fl4->flowi4_mark = mark; | |
273 | } | |
274 | ||
c5441932 PS |
275 | int ip_tunnel_init(struct net_device *dev); |
276 | void ip_tunnel_uninit(struct net_device *dev); | |
277 | void ip_tunnel_dellink(struct net_device *dev, struct list_head *head); | |
1728d4fa | 278 | struct net *ip_tunnel_get_link_net(const struct net_device *dev); |
1e99584b | 279 | int ip_tunnel_get_iflink(const struct net_device *dev); |
c7d03a00 | 280 | int ip_tunnel_init_net(struct net *net, unsigned int ip_tnl_net_id, |
d3b6f614 | 281 | struct rtnl_link_ops *ops, char *devname); |
c5441932 | 282 | |
64bc1781 ED |
283 | void ip_tunnel_delete_nets(struct list_head *list_net, unsigned int id, |
284 | struct rtnl_link_ops *ops); | |
c5441932 PS |
285 | |
286 | void ip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev, | |
bf3d6a8f | 287 | const struct iphdr *tnl_params, const u8 protocol); |
cfc7381b AS |
288 | void ip_md_tunnel_xmit(struct sk_buff *skb, struct net_device *dev, |
289 | const u8 proto); | |
c5441932 | 290 | int ip_tunnel_ioctl(struct net_device *dev, struct ip_tunnel_parm *p, int cmd); |
7e059158 | 291 | int __ip_tunnel_change_mtu(struct net_device *dev, int new_mtu, bool strict); |
c5441932 PS |
292 | int ip_tunnel_change_mtu(struct net_device *dev, int new_mtu); |
293 | ||
bc1f4470 | 294 | void ip_tunnel_get_stats64(struct net_device *dev, |
295 | struct rtnl_link_stats64 *tot); | |
c5441932 PS |
296 | struct ip_tunnel *ip_tunnel_lookup(struct ip_tunnel_net *itn, |
297 | int link, __be16 flags, | |
298 | __be32 remote, __be32 local, | |
299 | __be32 key); | |
300 | ||
301 | int ip_tunnel_rcv(struct ip_tunnel *tunnel, struct sk_buff *skb, | |
2e15ea39 PS |
302 | const struct tnl_ptk_info *tpi, struct metadata_dst *tun_dst, |
303 | bool log_ecn_error); | |
c5441932 | 304 | int ip_tunnel_changelink(struct net_device *dev, struct nlattr *tb[], |
9830ad4c | 305 | struct ip_tunnel_parm *p, __u32 fwmark); |
c5441932 | 306 | int ip_tunnel_newlink(struct net_device *dev, struct nlattr *tb[], |
9830ad4c | 307 | struct ip_tunnel_parm *p, __u32 fwmark); |
c7d03a00 | 308 | void ip_tunnel_setup(struct net_device *dev, unsigned int net_id); |
55c2bc14 TH |
309 | |
310 | struct ip_tunnel_encap_ops { | |
311 | size_t (*encap_hlen)(struct ip_tunnel_encap *e); | |
312 | int (*build_header)(struct sk_buff *skb, struct ip_tunnel_encap *e, | |
313 | u8 *protocol, struct flowi4 *fl4); | |
314 | }; | |
315 | ||
316 | #define MAX_IPTUN_ENCAP_OPS 8 | |
317 | ||
318 | extern const struct ip_tunnel_encap_ops __rcu * | |
319 | iptun_encaps[MAX_IPTUN_ENCAP_OPS]; | |
320 | ||
321 | int ip_tunnel_encap_add_ops(const struct ip_tunnel_encap_ops *op, | |
322 | unsigned int num); | |
323 | int ip_tunnel_encap_del_ops(const struct ip_tunnel_encap_ops *op, | |
324 | unsigned int num); | |
325 | ||
56328486 TH |
326 | int ip_tunnel_encap_setup(struct ip_tunnel *t, |
327 | struct ip_tunnel_encap *ipencap); | |
c5441932 | 328 | |
55c2bc14 TH |
329 | static inline int ip_encap_hlen(struct ip_tunnel_encap *e) |
330 | { | |
331 | const struct ip_tunnel_encap_ops *ops; | |
332 | int hlen = -EINVAL; | |
333 | ||
334 | if (e->type == TUNNEL_ENCAP_NONE) | |
335 | return 0; | |
336 | ||
337 | if (e->type >= MAX_IPTUN_ENCAP_OPS) | |
338 | return -EINVAL; | |
339 | ||
340 | rcu_read_lock(); | |
341 | ops = rcu_dereference(iptun_encaps[e->type]); | |
342 | if (likely(ops && ops->encap_hlen)) | |
343 | hlen = ops->encap_hlen(e); | |
344 | rcu_read_unlock(); | |
345 | ||
346 | return hlen; | |
347 | } | |
348 | ||
349 | static inline int ip_tunnel_encap(struct sk_buff *skb, struct ip_tunnel *t, | |
350 | u8 *protocol, struct flowi4 *fl4) | |
351 | { | |
352 | const struct ip_tunnel_encap_ops *ops; | |
353 | int ret = -EINVAL; | |
354 | ||
355 | if (t->encap.type == TUNNEL_ENCAP_NONE) | |
356 | return 0; | |
357 | ||
358 | if (t->encap.type >= MAX_IPTUN_ENCAP_OPS) | |
359 | return -EINVAL; | |
360 | ||
361 | rcu_read_lock(); | |
362 | ops = rcu_dereference(iptun_encaps[t->encap.type]); | |
363 | if (likely(ops && ops->build_header)) | |
364 | ret = ops->build_header(skb, &t->encap, protocol, fl4); | |
365 | rcu_read_unlock(); | |
366 | ||
367 | return ret; | |
368 | } | |
369 | ||
c5441932 PS |
370 | /* Extract dsfield from inner protocol */ |
371 | static inline u8 ip_tunnel_get_dsfield(const struct iphdr *iph, | |
372 | const struct sk_buff *skb) | |
373 | { | |
374 | if (skb->protocol == htons(ETH_P_IP)) | |
375 | return iph->tos; | |
376 | else if (skb->protocol == htons(ETH_P_IPV6)) | |
377 | return ipv6_get_dsfield((const struct ipv6hdr *)iph); | |
378 | else | |
379 | return 0; | |
380 | } | |
381 | ||
72f6d71e HL |
382 | static inline u8 ip_tunnel_get_ttl(const struct iphdr *iph, |
383 | const struct sk_buff *skb) | |
384 | { | |
385 | if (skb->protocol == htons(ETH_P_IP)) | |
386 | return iph->ttl; | |
387 | else if (skb->protocol == htons(ETH_P_IPV6)) | |
388 | return ((const struct ipv6hdr *)iph)->hop_limit; | |
389 | else | |
390 | return 0; | |
391 | } | |
392 | ||
c5441932 PS |
393 | /* Propogate ECN bits out */ |
394 | static inline u8 ip_tunnel_ecn_encap(u8 tos, const struct iphdr *iph, | |
395 | const struct sk_buff *skb) | |
396 | { | |
397 | u8 inner = ip_tunnel_get_dsfield(iph, skb); | |
398 | ||
399 | return INET_ECN_encapsulate(tos, inner); | |
400 | } | |
401 | ||
a6d5bbf3 JB |
402 | int __iptunnel_pull_header(struct sk_buff *skb, int hdr_len, |
403 | __be16 inner_proto, bool raw_proto, bool xnet); | |
404 | ||
405 | static inline int iptunnel_pull_header(struct sk_buff *skb, int hdr_len, | |
406 | __be16 inner_proto, bool xnet) | |
407 | { | |
408 | return __iptunnel_pull_header(skb, hdr_len, inner_proto, false, xnet); | |
409 | } | |
410 | ||
039f5062 PS |
411 | void iptunnel_xmit(struct sock *sk, struct rtable *rt, struct sk_buff *skb, |
412 | __be32 src, __be32 dst, u8 proto, | |
413 | u8 tos, u8 ttl, __be16 df, bool xnet); | |
63d008a4 JB |
414 | struct metadata_dst *iptunnel_metadata_reply(struct metadata_dst *md, |
415 | gfp_t flags); | |
0e6fbc5b | 416 | |
aed069df | 417 | int iptunnel_handle_offloads(struct sk_buff *skb, int gso_type_mask); |
2d26f0a3 | 418 | |
a09a4c8d JG |
419 | static inline int iptunnel_pull_offloads(struct sk_buff *skb) |
420 | { | |
421 | if (skb_is_gso(skb)) { | |
422 | int err; | |
423 | ||
424 | err = skb_unclone(skb, GFP_ATOMIC); | |
425 | if (unlikely(err)) | |
426 | return err; | |
427 | skb_shinfo(skb)->gso_type &= ~(NETIF_F_GSO_ENCAP_ALL >> | |
428 | NETIF_F_GSO_SHIFT); | |
429 | } | |
430 | ||
431 | skb->encapsulation = 0; | |
432 | return 0; | |
433 | } | |
434 | ||
039f5062 | 435 | static inline void iptunnel_xmit_stats(struct net_device *dev, int pkt_len) |
c5441932 | 436 | { |
039f5062 PS |
437 | if (pkt_len > 0) { |
438 | struct pcpu_sw_netstats *tstats = get_cpu_ptr(dev->tstats); | |
c5441932 | 439 | |
c5441932 | 440 | u64_stats_update_begin(&tstats->syncp); |
039f5062 | 441 | tstats->tx_bytes += pkt_len; |
c5441932 PS |
442 | tstats->tx_packets++; |
443 | u64_stats_update_end(&tstats->syncp); | |
b4fe85f9 | 444 | put_cpu_ptr(tstats); |
c5441932 | 445 | } else { |
039f5062 PS |
446 | struct net_device_stats *err_stats = &dev->stats; |
447 | ||
448 | if (pkt_len < 0) { | |
449 | err_stats->tx_errors++; | |
450 | err_stats->tx_aborted_errors++; | |
451 | } else { | |
452 | err_stats->tx_dropped++; | |
453 | } | |
c5441932 PS |
454 | } |
455 | } | |
5243b6ac | 456 | |
4c222798 | 457 | static inline void *ip_tunnel_info_opts(struct ip_tunnel_info *info) |
ee122c79 TG |
458 | { |
459 | return info + 1; | |
460 | } | |
461 | ||
4c222798 PS |
462 | static inline void ip_tunnel_info_opts_get(void *to, |
463 | const struct ip_tunnel_info *info) | |
464 | { | |
465 | memcpy(to, info + 1, info->options_len); | |
466 | } | |
467 | ||
468 | static inline void ip_tunnel_info_opts_set(struct ip_tunnel_info *info, | |
469 | const void *from, int len) | |
470 | { | |
471 | memcpy(ip_tunnel_info_opts(info), from, len); | |
472 | info->options_len = len; | |
473 | } | |
474 | ||
3093fbe7 TG |
475 | static inline struct ip_tunnel_info *lwt_tun_info(struct lwtunnel_state *lwtstate) |
476 | { | |
477 | return (struct ip_tunnel_info *)lwtstate->data; | |
478 | } | |
479 | ||
5263a98f | 480 | DECLARE_STATIC_KEY_FALSE(ip_tunnel_metadata_cnt); |
e7030878 TG |
481 | |
482 | /* Returns > 0 if metadata should be collected */ | |
483 | static inline int ip_tunnel_collect_metadata(void) | |
484 | { | |
5263a98f | 485 | return static_branch_unlikely(&ip_tunnel_metadata_cnt); |
e7030878 TG |
486 | } |
487 | ||
045a0fa0 TG |
488 | void __init ip_tunnel_core_init(void); |
489 | ||
e7030878 TG |
490 | void ip_tunnel_need_metadata(void); |
491 | void ip_tunnel_unneed_metadata(void); | |
492 | ||
05283187 TG |
493 | #else /* CONFIG_INET */ |
494 | ||
495 | static inline struct ip_tunnel_info *lwt_tun_info(struct lwtunnel_state *lwtstate) | |
496 | { | |
497 | return NULL; | |
498 | } | |
499 | ||
500 | static inline void ip_tunnel_need_metadata(void) | |
501 | { | |
502 | } | |
503 | ||
504 | static inline void ip_tunnel_unneed_metadata(void) | |
505 | { | |
506 | } | |
507 | ||
e28e87ed DB |
508 | static inline void ip_tunnel_info_opts_get(void *to, |
509 | const struct ip_tunnel_info *info) | |
510 | { | |
511 | } | |
512 | ||
513 | static inline void ip_tunnel_info_opts_set(struct ip_tunnel_info *info, | |
514 | const void *from, int len) | |
515 | { | |
516 | info->options_len = 0; | |
517 | } | |
518 | ||
5243b6ac JG |
519 | #endif /* CONFIG_INET */ |
520 | ||
c5441932 | 521 | #endif /* __NET_IP_TUNNELS_H */ |