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 \ | |
c593642c PB |
36 | (sizeof_field(struct ip_tunnel_key, u) - \ |
37 | sizeof_field(struct ip_tunnel_key, u.ipv4)) | |
c1ea5d67 | 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; | |
451ef36b | 57 | __u8 flow_flags; |
ac1cf399 | 58 | }; |
1d8fff90 | 59 | |
ac931d4c CE |
60 | struct ip_tunnel_encap { |
61 | u16 type; | |
62 | u16 flags; | |
63 | __be16 sport; | |
64 | __be16 dport; | |
65 | }; | |
66 | ||
46fa062a JB |
67 | /* Flags for ip_tunnel_info mode. */ |
68 | #define IP_TUNNEL_INFO_TX 0x01 /* represents tx tunnel parameters */ | |
7f9562a1 | 69 | #define IP_TUNNEL_INFO_IPV6 0x02 /* key contains IPv6 addresses */ |
f35581d6 | 70 | #define IP_TUNNEL_INFO_BRIDGE 0x04 /* represents a bridged tunnel id */ |
ee122c79 | 71 | |
fca5fdf6 DB |
72 | /* Maximum tunnel options length. */ |
73 | #define IP_TUNNEL_OPTS_MAX \ | |
c593642c | 74 | GENMASK((sizeof_field(struct ip_tunnel_info, \ |
fca5fdf6 DB |
75 | options_len) * BITS_PER_BYTE) - 1, 0) |
76 | ||
bc9d003d GL |
77 | #define ip_tunnel_info_opts(info) \ |
78 | _Generic(info, \ | |
79 | const struct ip_tunnel_info * : ((const void *)((info) + 1)),\ | |
80 | struct ip_tunnel_info * : ((void *)((info) + 1))\ | |
81 | ) | |
82 | ||
1d8fff90 TG |
83 | struct ip_tunnel_info { |
84 | struct ip_tunnel_key key; | |
ac931d4c | 85 | struct ip_tunnel_encap encap; |
d71785ff PA |
86 | #ifdef CONFIG_DST_CACHE |
87 | struct dst_cache dst_cache; | |
88 | #endif | |
1d8fff90 | 89 | u8 options_len; |
ee122c79 | 90 | u8 mode; |
1d8fff90 TG |
91 | }; |
92 | ||
c5441932 PS |
93 | /* 6rd prefix/relay information */ |
94 | #ifdef CONFIG_IPV6_SIT_6RD | |
95 | struct ip_tunnel_6rd_parm { | |
96 | struct in6_addr prefix; | |
97 | __be32 relay_prefix; | |
98 | u16 prefixlen; | |
99 | u16 relay_prefixlen; | |
100 | }; | |
101 | #endif | |
102 | ||
103 | struct ip_tunnel_prl_entry { | |
104 | struct ip_tunnel_prl_entry __rcu *next; | |
105 | __be32 addr; | |
106 | u16 flags; | |
107 | struct rcu_head rcu_head; | |
108 | }; | |
109 | ||
2e15ea39 PS |
110 | struct metadata_dst; |
111 | ||
c5441932 PS |
112 | struct ip_tunnel { |
113 | struct ip_tunnel __rcu *next; | |
114 | struct hlist_node hash_node; | |
c0fd407a | 115 | |
c5441932 | 116 | struct net_device *dev; |
c0fd407a ED |
117 | netdevice_tracker dev_tracker; |
118 | ||
5e6700b3 | 119 | struct net *net; /* netns for packet i/o */ |
c5441932 | 120 | |
c5441932 PS |
121 | unsigned long err_time; /* Time when the last ICMP error |
122 | * arrived */ | |
f38ba953 | 123 | int err_count; /* Number of arrived ICMP errors */ |
c5441932 PS |
124 | |
125 | /* These four fields used only by GRE */ | |
6b8847c5 | 126 | u32 i_seqno; /* The last seen seqno */ |
31c417c9 | 127 | atomic_t o_seqno; /* The last output seqno */ |
56328486 | 128 | int tun_hlen; /* Precalculated header length */ |
c5441932 | 129 | |
f551c91d | 130 | /* These four fields used only by ERSPAN */ |
84e54fe0 | 131 | u32 index; /* ERSPAN type II index */ |
f551c91d WT |
132 | u8 erspan_ver; /* ERSPAN version */ |
133 | u8 dir; /* ERSPAN direction */ | |
134 | u16 hwid; /* ERSPAN hardware ID */ | |
84e54fe0 | 135 | |
e09acddf | 136 | struct dst_cache dst_cache; |
7d442fab | 137 | |
c5441932 PS |
138 | struct ip_tunnel_parm parms; |
139 | ||
f38ba953 | 140 | int mlink; |
56328486 | 141 | int encap_hlen; /* Encap header length (FOU,GUE) */ |
56328486 | 142 | int hlen; /* tun_hlen + encap_hlen */ |
f38ba953 | 143 | struct ip_tunnel_encap encap; |
56328486 | 144 | |
c5441932 PS |
145 | /* for SIT */ |
146 | #ifdef CONFIG_IPV6_SIT_6RD | |
147 | struct ip_tunnel_6rd_parm ip6rd; | |
148 | #endif | |
149 | struct ip_tunnel_prl_entry __rcu *prl; /* potential router list */ | |
150 | unsigned int prl_count; /* # of entries in PRL */ | |
c7d03a00 | 151 | unsigned int ip_tnl_net_id; |
c5441932 | 152 | struct gro_cells gro_cells; |
9830ad4c | 153 | __u32 fwmark; |
2e15ea39 | 154 | bool collect_md; |
22a59be8 | 155 | bool ignore_df; |
c5441932 PS |
156 | }; |
157 | ||
c5441932 PS |
158 | struct tnl_ptk_info { |
159 | __be16 flags; | |
160 | __be16 proto; | |
161 | __be32 key; | |
162 | __be32 seq; | |
9b8c6d7b | 163 | int hdr_len; |
c5441932 PS |
164 | }; |
165 | ||
166 | #define PACKET_RCVD 0 | |
167 | #define PACKET_REJECT 1 | |
125372fa | 168 | #define PACKET_NEXT 2 |
c5441932 | 169 | |
6261d983 | 170 | #define IP_TNL_HASH_BITS 7 |
c5441932 PS |
171 | #define IP_TNL_HASH_SIZE (1 << IP_TNL_HASH_BITS) |
172 | ||
173 | struct ip_tunnel_net { | |
c5441932 | 174 | struct net_device *fb_tunnel_dev; |
79134e6c | 175 | struct rtnl_link_ops *rtnl_link_ops; |
6261d983 | 176 | struct hlist_head tunnels[IP_TNL_HASH_SIZE]; |
2e15ea39 | 177 | struct ip_tunnel __rcu *collect_md_tun; |
79134e6c | 178 | int type; |
c5441932 PS |
179 | }; |
180 | ||
4c222798 PS |
181 | static inline void ip_tunnel_key_init(struct ip_tunnel_key *key, |
182 | __be32 saddr, __be32 daddr, | |
13461144 | 183 | u8 tos, u8 ttl, __be32 label, |
4c222798 PS |
184 | __be16 tp_src, __be16 tp_dst, |
185 | __be64 tun_id, __be16 tun_flags) | |
1d8fff90 | 186 | { |
4c222798 PS |
187 | key->tun_id = tun_id; |
188 | key->u.ipv4.src = saddr; | |
189 | key->u.ipv4.dst = daddr; | |
190 | memset((unsigned char *)key + IP_TUNNEL_KEY_IPV4_PAD, | |
c1ea5d67 | 191 | 0, IP_TUNNEL_KEY_IPV4_PAD_LEN); |
4c222798 PS |
192 | key->tos = tos; |
193 | key->ttl = ttl; | |
13461144 | 194 | key->label = label; |
4c222798 | 195 | key->tun_flags = tun_flags; |
1d8fff90 TG |
196 | |
197 | /* For the tunnel types on the top of IPsec, the tp_src and tp_dst of | |
198 | * the upper tunnel are used. | |
199 | * E.g: GRE over IPSEC, the tp_src and tp_port are zero. | |
200 | */ | |
4c222798 PS |
201 | key->tp_src = tp_src; |
202 | key->tp_dst = tp_dst; | |
1d8fff90 TG |
203 | |
204 | /* Clear struct padding. */ | |
4c222798 PS |
205 | if (sizeof(*key) != IP_TUNNEL_KEY_SIZE) |
206 | memset((unsigned char *)key + IP_TUNNEL_KEY_SIZE, | |
207 | 0, sizeof(*key) - IP_TUNNEL_KEY_SIZE); | |
1d8fff90 TG |
208 | } |
209 | ||
db3c6139 DB |
210 | static inline bool |
211 | ip_tunnel_dst_cache_usable(const struct sk_buff *skb, | |
212 | const struct ip_tunnel_info *info) | |
213 | { | |
214 | if (skb->mark) | |
215 | return false; | |
216 | if (!info) | |
217 | return true; | |
218 | if (info->key.tun_flags & TUNNEL_NOCACHE) | |
219 | return false; | |
220 | ||
221 | return true; | |
222 | } | |
223 | ||
7f9562a1 JB |
224 | static inline unsigned short ip_tunnel_info_af(const struct ip_tunnel_info |
225 | *tun_info) | |
226 | { | |
227 | return tun_info->mode & IP_TUNNEL_INFO_IPV6 ? AF_INET6 : AF_INET; | |
228 | } | |
229 | ||
d817f432 AV |
230 | static inline __be64 key32_to_tunnel_id(__be32 key) |
231 | { | |
232 | #ifdef __BIG_ENDIAN | |
233 | return (__force __be64)key; | |
234 | #else | |
235 | return (__force __be64)((__force u64)key << 32); | |
236 | #endif | |
237 | } | |
238 | ||
239 | /* Returns the least-significant 32 bits of a __be64. */ | |
240 | static inline __be32 tunnel_id_to_key32(__be64 tun_id) | |
241 | { | |
242 | #ifdef __BIG_ENDIAN | |
243 | return (__force __be32)tun_id; | |
244 | #else | |
245 | return (__force __be32)((__force u64)tun_id >> 32); | |
246 | #endif | |
247 | } | |
248 | ||
5243b6ac JG |
249 | #ifdef CONFIG_INET |
250 | ||
b0066da5 PM |
251 | static inline void ip_tunnel_init_flow(struct flowi4 *fl4, |
252 | int proto, | |
253 | __be32 daddr, __be32 saddr, | |
db53cd3d DA |
254 | __be32 key, __u8 tos, |
255 | struct net *net, int oif, | |
7ec9fce4 EB |
256 | __u32 mark, __u32 tun_inner_hash, |
257 | __u8 flow_flags) | |
b0066da5 PM |
258 | { |
259 | memset(fl4, 0, sizeof(*fl4)); | |
db53cd3d DA |
260 | |
261 | if (oif) { | |
262 | fl4->flowi4_l3mdev = l3mdev_master_upper_ifindex_by_index_rcu(net, oif); | |
263 | /* Legacy VRF/l3mdev use case */ | |
264 | fl4->flowi4_oif = fl4->flowi4_l3mdev ? 0 : oif; | |
265 | } | |
266 | ||
b0066da5 PM |
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; | |
24ba1440 | 273 | fl4->flowi4_multipath_hash = tun_inner_hash; |
7ec9fce4 | 274 | fl4->flowi4_flags = flow_flags; |
b0066da5 PM |
275 | } |
276 | ||
c5441932 PS |
277 | int ip_tunnel_init(struct net_device *dev); |
278 | void ip_tunnel_uninit(struct net_device *dev); | |
279 | void ip_tunnel_dellink(struct net_device *dev, struct list_head *head); | |
1728d4fa | 280 | struct net *ip_tunnel_get_link_net(const struct net_device *dev); |
1e99584b | 281 | int ip_tunnel_get_iflink(const struct net_device *dev); |
c7d03a00 | 282 | int ip_tunnel_init_net(struct net *net, unsigned int ip_tnl_net_id, |
d3b6f614 | 283 | struct rtnl_link_ops *ops, char *devname); |
c5441932 | 284 | |
64bc1781 ED |
285 | void ip_tunnel_delete_nets(struct list_head *list_net, unsigned int id, |
286 | struct rtnl_link_ops *ops); | |
c5441932 PS |
287 | |
288 | void ip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev, | |
bf3d6a8f | 289 | const struct iphdr *tnl_params, const u8 protocol); |
cfc7381b | 290 | void ip_md_tunnel_xmit(struct sk_buff *skb, struct net_device *dev, |
c8b34e68 | 291 | const u8 proto, int tunnel_hlen); |
607259a6 | 292 | int ip_tunnel_ctl(struct net_device *dev, struct ip_tunnel_parm *p, int cmd); |
3e7a1c7c AB |
293 | int ip_tunnel_siocdevprivate(struct net_device *dev, struct ifreq *ifr, |
294 | void __user *data, int cmd); | |
7e059158 | 295 | int __ip_tunnel_change_mtu(struct net_device *dev, int new_mtu, bool strict); |
c5441932 PS |
296 | int ip_tunnel_change_mtu(struct net_device *dev, int new_mtu); |
297 | ||
c5441932 PS |
298 | struct ip_tunnel *ip_tunnel_lookup(struct ip_tunnel_net *itn, |
299 | int link, __be16 flags, | |
300 | __be32 remote, __be32 local, | |
301 | __be32 key); | |
302 | ||
ac931d4c | 303 | void ip_tunnel_md_udp_encap(struct sk_buff *skb, struct ip_tunnel_info *info); |
c5441932 | 304 | int ip_tunnel_rcv(struct ip_tunnel *tunnel, struct sk_buff *skb, |
2e15ea39 PS |
305 | const struct tnl_ptk_info *tpi, struct metadata_dst *tun_dst, |
306 | bool log_ecn_error); | |
c5441932 | 307 | int ip_tunnel_changelink(struct net_device *dev, struct nlattr *tb[], |
9830ad4c | 308 | struct ip_tunnel_parm *p, __u32 fwmark); |
c5441932 | 309 | int ip_tunnel_newlink(struct net_device *dev, struct nlattr *tb[], |
9830ad4c | 310 | struct ip_tunnel_parm *p, __u32 fwmark); |
c7d03a00 | 311 | void ip_tunnel_setup(struct net_device *dev, unsigned int net_id); |
55c2bc14 | 312 | |
537dd2d9 LJ |
313 | bool ip_tunnel_netlink_encap_parms(struct nlattr *data[], |
314 | struct ip_tunnel_encap *encap); | |
315 | ||
b86fca80 LJ |
316 | void ip_tunnel_netlink_parms(struct nlattr *data[], |
317 | struct ip_tunnel_parm *parms); | |
318 | ||
2606aff9 JD |
319 | extern const struct header_ops ip_tunnel_header_ops; |
320 | __be16 ip_tunnel_parse_protocol(const struct sk_buff *skb); | |
321 | ||
55c2bc14 TH |
322 | struct ip_tunnel_encap_ops { |
323 | size_t (*encap_hlen)(struct ip_tunnel_encap *e); | |
324 | int (*build_header)(struct sk_buff *skb, struct ip_tunnel_encap *e, | |
325 | u8 *protocol, struct flowi4 *fl4); | |
e7cc0824 | 326 | int (*err_handler)(struct sk_buff *skb, u32 info); |
55c2bc14 TH |
327 | }; |
328 | ||
329 | #define MAX_IPTUN_ENCAP_OPS 8 | |
330 | ||
331 | extern const struct ip_tunnel_encap_ops __rcu * | |
332 | iptun_encaps[MAX_IPTUN_ENCAP_OPS]; | |
333 | ||
334 | int ip_tunnel_encap_add_ops(const struct ip_tunnel_encap_ops *op, | |
335 | unsigned int num); | |
336 | int ip_tunnel_encap_del_ops(const struct ip_tunnel_encap_ops *op, | |
337 | unsigned int num); | |
338 | ||
56328486 TH |
339 | int ip_tunnel_encap_setup(struct ip_tunnel *t, |
340 | struct ip_tunnel_encap *ipencap); | |
c5441932 | 341 | |
cb9f1b78 WB |
342 | static inline bool pskb_inet_may_pull(struct sk_buff *skb) |
343 | { | |
344 | int nhlen; | |
345 | ||
346 | switch (skb->protocol) { | |
347 | #if IS_ENABLED(CONFIG_IPV6) | |
348 | case htons(ETH_P_IPV6): | |
349 | nhlen = sizeof(struct ipv6hdr); | |
350 | break; | |
351 | #endif | |
352 | case htons(ETH_P_IP): | |
353 | nhlen = sizeof(struct iphdr); | |
354 | break; | |
355 | default: | |
356 | nhlen = 0; | |
357 | } | |
358 | ||
359 | return pskb_network_may_pull(skb, nhlen); | |
360 | } | |
361 | ||
55c2bc14 TH |
362 | static inline int ip_encap_hlen(struct ip_tunnel_encap *e) |
363 | { | |
364 | const struct ip_tunnel_encap_ops *ops; | |
365 | int hlen = -EINVAL; | |
366 | ||
367 | if (e->type == TUNNEL_ENCAP_NONE) | |
368 | return 0; | |
369 | ||
370 | if (e->type >= MAX_IPTUN_ENCAP_OPS) | |
371 | return -EINVAL; | |
372 | ||
373 | rcu_read_lock(); | |
374 | ops = rcu_dereference(iptun_encaps[e->type]); | |
375 | if (likely(ops && ops->encap_hlen)) | |
376 | hlen = ops->encap_hlen(e); | |
377 | rcu_read_unlock(); | |
378 | ||
379 | return hlen; | |
380 | } | |
381 | ||
ac931d4c CE |
382 | static inline int ip_tunnel_encap(struct sk_buff *skb, |
383 | struct ip_tunnel_encap *e, | |
55c2bc14 TH |
384 | u8 *protocol, struct flowi4 *fl4) |
385 | { | |
386 | const struct ip_tunnel_encap_ops *ops; | |
387 | int ret = -EINVAL; | |
388 | ||
ac931d4c | 389 | if (e->type == TUNNEL_ENCAP_NONE) |
55c2bc14 TH |
390 | return 0; |
391 | ||
ac931d4c | 392 | if (e->type >= MAX_IPTUN_ENCAP_OPS) |
55c2bc14 TH |
393 | return -EINVAL; |
394 | ||
395 | rcu_read_lock(); | |
ac931d4c | 396 | ops = rcu_dereference(iptun_encaps[e->type]); |
55c2bc14 | 397 | if (likely(ops && ops->build_header)) |
ac931d4c | 398 | ret = ops->build_header(skb, e, protocol, fl4); |
55c2bc14 TH |
399 | rcu_read_unlock(); |
400 | ||
401 | return ret; | |
402 | } | |
403 | ||
c5441932 PS |
404 | /* Extract dsfield from inner protocol */ |
405 | static inline u8 ip_tunnel_get_dsfield(const struct iphdr *iph, | |
406 | const struct sk_buff *skb) | |
407 | { | |
7074732c MM |
408 | __be16 payload_protocol = skb_protocol(skb, true); |
409 | ||
410 | if (payload_protocol == htons(ETH_P_IP)) | |
c5441932 | 411 | return iph->tos; |
7074732c | 412 | else if (payload_protocol == htons(ETH_P_IPV6)) |
c5441932 PS |
413 | return ipv6_get_dsfield((const struct ipv6hdr *)iph); |
414 | else | |
415 | return 0; | |
416 | } | |
417 | ||
72f6d71e HL |
418 | static inline u8 ip_tunnel_get_ttl(const struct iphdr *iph, |
419 | const struct sk_buff *skb) | |
420 | { | |
7074732c MM |
421 | __be16 payload_protocol = skb_protocol(skb, true); |
422 | ||
423 | if (payload_protocol == htons(ETH_P_IP)) | |
72f6d71e | 424 | return iph->ttl; |
7074732c | 425 | else if (payload_protocol == htons(ETH_P_IPV6)) |
72f6d71e HL |
426 | return ((const struct ipv6hdr *)iph)->hop_limit; |
427 | else | |
428 | return 0; | |
429 | } | |
430 | ||
c5441932 PS |
431 | /* Propogate ECN bits out */ |
432 | static inline u8 ip_tunnel_ecn_encap(u8 tos, const struct iphdr *iph, | |
433 | const struct sk_buff *skb) | |
434 | { | |
435 | u8 inner = ip_tunnel_get_dsfield(iph, skb); | |
436 | ||
437 | return INET_ECN_encapsulate(tos, inner); | |
438 | } | |
439 | ||
a6d5bbf3 JB |
440 | int __iptunnel_pull_header(struct sk_buff *skb, int hdr_len, |
441 | __be16 inner_proto, bool raw_proto, bool xnet); | |
442 | ||
443 | static inline int iptunnel_pull_header(struct sk_buff *skb, int hdr_len, | |
444 | __be16 inner_proto, bool xnet) | |
445 | { | |
446 | return __iptunnel_pull_header(skb, hdr_len, inner_proto, false, xnet); | |
447 | } | |
448 | ||
039f5062 PS |
449 | void iptunnel_xmit(struct sock *sk, struct rtable *rt, struct sk_buff *skb, |
450 | __be32 src, __be32 dst, u8 proto, | |
451 | u8 tos, u8 ttl, __be16 df, bool xnet); | |
63d008a4 JB |
452 | struct metadata_dst *iptunnel_metadata_reply(struct metadata_dst *md, |
453 | gfp_t flags); | |
4cb47a86 SB |
454 | int skb_tunnel_check_pmtu(struct sk_buff *skb, struct dst_entry *encap_dst, |
455 | int headroom, bool reply); | |
0e6fbc5b | 456 | |
aed069df | 457 | int iptunnel_handle_offloads(struct sk_buff *skb, int gso_type_mask); |
2d26f0a3 | 458 | |
a09a4c8d JG |
459 | static inline int iptunnel_pull_offloads(struct sk_buff *skb) |
460 | { | |
461 | if (skb_is_gso(skb)) { | |
462 | int err; | |
463 | ||
464 | err = skb_unclone(skb, GFP_ATOMIC); | |
465 | if (unlikely(err)) | |
466 | return err; | |
467 | skb_shinfo(skb)->gso_type &= ~(NETIF_F_GSO_ENCAP_ALL >> | |
468 | NETIF_F_GSO_SHIFT); | |
469 | } | |
470 | ||
471 | skb->encapsulation = 0; | |
472 | return 0; | |
473 | } | |
474 | ||
039f5062 | 475 | static inline void iptunnel_xmit_stats(struct net_device *dev, int pkt_len) |
c5441932 | 476 | { |
039f5062 PS |
477 | if (pkt_len > 0) { |
478 | struct pcpu_sw_netstats *tstats = get_cpu_ptr(dev->tstats); | |
c5441932 | 479 | |
c5441932 | 480 | u64_stats_update_begin(&tstats->syncp); |
9962acef ED |
481 | u64_stats_add(&tstats->tx_bytes, pkt_len); |
482 | u64_stats_inc(&tstats->tx_packets); | |
c5441932 | 483 | u64_stats_update_end(&tstats->syncp); |
b4fe85f9 | 484 | put_cpu_ptr(tstats); |
c5441932 | 485 | } else { |
039f5062 PS |
486 | struct net_device_stats *err_stats = &dev->stats; |
487 | ||
488 | if (pkt_len < 0) { | |
489 | err_stats->tx_errors++; | |
490 | err_stats->tx_aborted_errors++; | |
491 | } else { | |
492 | err_stats->tx_dropped++; | |
493 | } | |
c5441932 PS |
494 | } |
495 | } | |
5243b6ac | 496 | |
4c222798 PS |
497 | static inline void ip_tunnel_info_opts_get(void *to, |
498 | const struct ip_tunnel_info *info) | |
499 | { | |
500 | memcpy(to, info + 1, info->options_len); | |
501 | } | |
502 | ||
503 | static inline void ip_tunnel_info_opts_set(struct ip_tunnel_info *info, | |
256c87c1 PJV |
504 | const void *from, int len, |
505 | __be16 flags) | |
4c222798 | 506 | { |
4c222798 | 507 | info->options_len = len; |
9c2e14b4 YHW |
508 | if (len > 0) { |
509 | memcpy(ip_tunnel_info_opts(info), from, len); | |
510 | info->key.tun_flags |= flags; | |
511 | } | |
4c222798 PS |
512 | } |
513 | ||
3093fbe7 TG |
514 | static inline struct ip_tunnel_info *lwt_tun_info(struct lwtunnel_state *lwtstate) |
515 | { | |
516 | return (struct ip_tunnel_info *)lwtstate->data; | |
517 | } | |
518 | ||
5263a98f | 519 | DECLARE_STATIC_KEY_FALSE(ip_tunnel_metadata_cnt); |
e7030878 TG |
520 | |
521 | /* Returns > 0 if metadata should be collected */ | |
522 | static inline int ip_tunnel_collect_metadata(void) | |
523 | { | |
5263a98f | 524 | return static_branch_unlikely(&ip_tunnel_metadata_cnt); |
e7030878 TG |
525 | } |
526 | ||
045a0fa0 TG |
527 | void __init ip_tunnel_core_init(void); |
528 | ||
e7030878 TG |
529 | void ip_tunnel_need_metadata(void); |
530 | void ip_tunnel_unneed_metadata(void); | |
531 | ||
05283187 TG |
532 | #else /* CONFIG_INET */ |
533 | ||
534 | static inline struct ip_tunnel_info *lwt_tun_info(struct lwtunnel_state *lwtstate) | |
535 | { | |
536 | return NULL; | |
537 | } | |
538 | ||
539 | static inline void ip_tunnel_need_metadata(void) | |
540 | { | |
541 | } | |
542 | ||
543 | static inline void ip_tunnel_unneed_metadata(void) | |
544 | { | |
545 | } | |
546 | ||
e28e87ed DB |
547 | static inline void ip_tunnel_info_opts_get(void *to, |
548 | const struct ip_tunnel_info *info) | |
549 | { | |
550 | } | |
551 | ||
552 | static inline void ip_tunnel_info_opts_set(struct ip_tunnel_info *info, | |
256c87c1 PJV |
553 | const void *from, int len, |
554 | __be16 flags) | |
e28e87ed DB |
555 | { |
556 | info->options_len = 0; | |
557 | } | |
558 | ||
5243b6ac JG |
559 | #endif /* CONFIG_INET */ |
560 | ||
c5441932 | 561 | #endif /* __NET_IP_TUNNELS_H */ |