Commit | Line | Data |
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2874c5fd | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
1da177e4 LT |
2 | /* |
3 | * INET An implementation of the TCP/IP protocol suite for the LINUX | |
4 | * operating system. INET is implemented using the BSD Socket | |
5 | * interface as the means of communication with the user level. | |
6 | * | |
7 | * Definitions for the Forwarding Information Base. | |
8 | * | |
9 | * Authors: A.N.Kuznetsov, <kuznet@ms2.inr.ac.ru> | |
1da177e4 LT |
10 | */ |
11 | ||
12 | #ifndef _NET_IP_FIB_H | |
13 | #define _NET_IP_FIB_H | |
14 | ||
1da177e4 LT |
15 | #include <net/flow.h> |
16 | #include <linux/seq_file.h> | |
4895c771 | 17 | #include <linux/rcupdate.h> |
04b1d4e5 | 18 | #include <net/fib_notifier.h> |
e1ef4bf2 | 19 | #include <net/fib_rules.h> |
f55fbb6a | 20 | #include <net/inet_dscp.h> |
8e773277 | 21 | #include <net/inetpeer.h> |
d26b3a7c | 22 | #include <linux/percpu.h> |
b90eb754 | 23 | #include <linux/notifier.h> |
0029c0de | 24 | #include <linux/refcount.h> |
1da177e4 | 25 | |
4e902c57 | 26 | struct fib_config { |
4e902c57 | 27 | u8 fc_dst_len; |
f55fbb6a | 28 | dscp_t fc_dscp; |
4e902c57 TG |
29 | u8 fc_protocol; |
30 | u8 fc_scope; | |
31 | u8 fc_type; | |
f35b794b DA |
32 | u8 fc_gw_family; |
33 | /* 2 bytes unused */ | |
4e902c57 | 34 | u32 fc_table; |
6d85c10a | 35 | __be32 fc_dst; |
a4ea5d43 DA |
36 | union { |
37 | __be32 fc_gw4; | |
38 | struct in6_addr fc_gw6; | |
39 | }; | |
4e902c57 TG |
40 | int fc_oif; |
41 | u32 fc_flags; | |
42 | u32 fc_priority; | |
6d85c10a | 43 | __be32 fc_prefsrc; |
493ced1a | 44 | u32 fc_nh_id; |
4e902c57 TG |
45 | struct nlattr *fc_mx; |
46 | struct rtnexthop *fc_mp; | |
47 | int fc_mx_len; | |
48 | int fc_mp_len; | |
49 | u32 fc_flow; | |
4e902c57 TG |
50 | u32 fc_nlflags; |
51 | struct nl_info fc_nlinfo; | |
571e7226 RP |
52 | struct nlattr *fc_encap; |
53 | u16 fc_encap_type; | |
54 | }; | |
1da177e4 LT |
55 | |
56 | struct fib_info; | |
f2bb4bed | 57 | struct rtable; |
1da177e4 | 58 | |
4895c771 DM |
59 | struct fib_nh_exception { |
60 | struct fib_nh_exception __rcu *fnhe_next; | |
5aad1de5 | 61 | int fnhe_genid; |
4895c771 DM |
62 | __be32 fnhe_daddr; |
63 | u32 fnhe_pmtu; | |
d52e5a7e | 64 | bool fnhe_mtu_locked; |
aee06da6 | 65 | __be32 fnhe_gw; |
4895c771 | 66 | unsigned long fnhe_expires; |
2ffae99d TT |
67 | struct rtable __rcu *fnhe_rth_input; |
68 | struct rtable __rcu *fnhe_rth_output; | |
4895c771 | 69 | unsigned long fnhe_stamp; |
deed49df | 70 | struct rcu_head rcu; |
4895c771 DM |
71 | }; |
72 | ||
73 | struct fnhe_hash_bucket { | |
74 | struct fib_nh_exception __rcu *chain; | |
75 | }; | |
76 | ||
d546c621 ED |
77 | #define FNHE_HASH_SHIFT 11 |
78 | #define FNHE_HASH_SIZE (1 << FNHE_HASH_SHIFT) | |
4895c771 DM |
79 | #define FNHE_RECLAIM_DEPTH 5 |
80 | ||
f1741730 DA |
81 | struct fib_nh_common { |
82 | struct net_device *nhc_dev; | |
e44b14eb | 83 | netdevice_tracker nhc_dev_tracker; |
f1741730 | 84 | int nhc_oif; |
f1741730 DA |
85 | unsigned char nhc_scope; |
86 | u8 nhc_family; | |
bdf00467 | 87 | u8 nhc_gw_family; |
ecc5663c DA |
88 | unsigned char nhc_flags; |
89 | struct lwtunnel_state *nhc_lwtstate; | |
bdf00467 | 90 | |
f1741730 DA |
91 | union { |
92 | __be32 ipv4; | |
93 | struct in6_addr ipv6; | |
94 | } nhc_gw; | |
95 | ||
96 | int nhc_weight; | |
97 | atomic_t nhc_upper_bound; | |
0f457a36 DA |
98 | |
99 | /* v4 specific, but allows fib6_nh with v4 routes */ | |
100 | struct rtable __rcu * __percpu *nhc_pcpu_rth_output; | |
101 | struct rtable __rcu *nhc_rth_input; | |
a5995e71 | 102 | struct fnhe_hash_bucket __rcu *nhc_exceptions; |
f1741730 DA |
103 | }; |
104 | ||
1da177e4 | 105 | struct fib_nh { |
f1741730 | 106 | struct fib_nh_common nh_common; |
1da177e4 LT |
107 | struct hlist_node nh_hash; |
108 | struct fib_info *nh_parent; | |
c7066f70 | 109 | #ifdef CONFIG_IP_ROUTE_CLASSID |
1da177e4 LT |
110 | __u32 nh_tclassid; |
111 | #endif | |
1fc050a1 | 112 | __be32 nh_saddr; |
436c3b66 | 113 | int nh_saddr_genid; |
f1741730 DA |
114 | #define fib_nh_family nh_common.nhc_family |
115 | #define fib_nh_dev nh_common.nhc_dev | |
e44b14eb | 116 | #define fib_nh_dev_tracker nh_common.nhc_dev_tracker |
f1741730 DA |
117 | #define fib_nh_oif nh_common.nhc_oif |
118 | #define fib_nh_flags nh_common.nhc_flags | |
119 | #define fib_nh_lws nh_common.nhc_lwtstate | |
120 | #define fib_nh_scope nh_common.nhc_scope | |
bdf00467 | 121 | #define fib_nh_gw_family nh_common.nhc_gw_family |
f1741730 DA |
122 | #define fib_nh_gw4 nh_common.nhc_gw.ipv4 |
123 | #define fib_nh_gw6 nh_common.nhc_gw.ipv6 | |
124 | #define fib_nh_weight nh_common.nhc_weight | |
125 | #define fib_nh_upper_bound nh_common.nhc_upper_bound | |
1da177e4 LT |
126 | }; |
127 | ||
128 | /* | |
129 | * This structure contains data shared by many of routes. | |
130 | */ | |
131 | ||
4c7e8084 DA |
132 | struct nexthop; |
133 | ||
1da177e4 LT |
134 | struct fib_info { |
135 | struct hlist_node fib_hash; | |
136 | struct hlist_node fib_lhash; | |
4c7e8084 | 137 | struct list_head nh_list; |
7462bd74 | 138 | struct net *fib_net; |
79976892 | 139 | refcount_t fib_treeref; |
0029c0de | 140 | refcount_t fib_clntref; |
95c96174 | 141 | unsigned int fib_flags; |
37e826c5 DM |
142 | unsigned char fib_dead; |
143 | unsigned char fib_protocol; | |
144 | unsigned char fib_scope; | |
f4ef85bb | 145 | unsigned char fib_type; |
b83738ae | 146 | __be32 fib_prefsrc; |
5a56a0b3 | 147 | u32 fib_tb_id; |
1da177e4 | 148 | u32 fib_priority; |
3fb07daf ED |
149 | struct dst_metrics *fib_metrics; |
150 | #define fib_mtu fib_metrics->metrics[RTAX_MTU-1] | |
151 | #define fib_window fib_metrics->metrics[RTAX_WINDOW-1] | |
152 | #define fib_rtt fib_metrics->metrics[RTAX_RTT-1] | |
153 | #define fib_advmss fib_metrics->metrics[RTAX_ADVMSS-1] | |
1da177e4 | 154 | int fib_nhs; |
19a9d136 | 155 | bool fib_nh_is_v6; |
1bff1a0c | 156 | bool nh_updated; |
4c7e8084 | 157 | struct nexthop *nh; |
ebc0ffae | 158 | struct rcu_head rcu; |
a5311060 | 159 | struct fib_nh fib_nh[]; |
1da177e4 LT |
160 | }; |
161 | ||
162 | ||
163 | #ifdef CONFIG_IP_MULTIPLE_TABLES | |
164 | struct fib_rule; | |
165 | #endif | |
166 | ||
5b470441 | 167 | struct fib_table; |
1da177e4 | 168 | struct fib_result { |
eba618ab DA |
169 | __be32 prefix; |
170 | unsigned char prefixlen; | |
171 | unsigned char nh_sel; | |
172 | unsigned char type; | |
173 | unsigned char scope; | |
174 | u32 tclassid; | |
175 | struct fib_nh_common *nhc; | |
176 | struct fib_info *fi; | |
177 | struct fib_table *table; | |
178 | struct hlist_head *fa_head; | |
1da177e4 LT |
179 | }; |
180 | ||
246955fe | 181 | struct fib_result_nl { |
80e856e1 | 182 | __be32 fl_addr; /* To be looked up*/ |
5f300893 | 183 | u32 fl_mark; |
246955fe RO |
184 | unsigned char fl_tos; |
185 | unsigned char fl_scope; | |
186 | unsigned char tb_id_in; | |
187 | ||
188 | unsigned char tb_id; /* Results */ | |
189 | unsigned char prefixlen; | |
190 | unsigned char nh_sel; | |
191 | unsigned char type; | |
192 | unsigned char scope; | |
82695b30 | 193 | int err; |
246955fe | 194 | }; |
1da177e4 | 195 | |
5b9e12db | 196 | #ifdef CONFIG_IP_MULTIPLE_TABLES |
93456b6d | 197 | #define FIB_TABLE_HASHSZ 256 |
5b9e12db DL |
198 | #else |
199 | #define FIB_TABLE_HASHSZ 2 | |
200 | #endif | |
1da177e4 | 201 | |
dcb1ecb5 DA |
202 | __be32 fib_info_update_nhc_saddr(struct net *net, struct fib_nh_common *nhc, |
203 | unsigned char scope); | |
eba618ab | 204 | __be32 fib_result_prefsrc(struct net *net, struct fib_result *res); |
436c3b66 | 205 | |
eba618ab DA |
206 | #define FIB_RES_NHC(res) ((res).nhc) |
207 | #define FIB_RES_DEV(res) (FIB_RES_NHC(res)->nhc_dev) | |
208 | #define FIB_RES_OIF(res) (FIB_RES_NHC(res)->nhc_oif) | |
1fc050a1 | 209 | |
1e301fd0 IS |
210 | struct fib_rt_info { |
211 | struct fib_info *fi; | |
212 | u32 tb_id; | |
213 | __be32 dst; | |
214 | int dst_len; | |
888ade8f | 215 | dscp_t dscp; |
1e301fd0 | 216 | u8 type; |
90b93f1b IS |
217 | u8 offload:1, |
218 | trap:1, | |
36c5100e AC |
219 | offload_failed:1, |
220 | unused:5; | |
1e301fd0 IS |
221 | }; |
222 | ||
b90eb754 JP |
223 | struct fib_entry_notifier_info { |
224 | struct fib_notifier_info info; /* must be first */ | |
225 | u32 dst; | |
226 | int dst_len; | |
227 | struct fib_info *fi; | |
568a3f33 | 228 | dscp_t dscp; |
b90eb754 JP |
229 | u8 type; |
230 | u32 tb_id; | |
b90eb754 JP |
231 | }; |
232 | ||
982acb97 IS |
233 | struct fib_nh_notifier_info { |
234 | struct fib_notifier_info info; /* must be first */ | |
235 | struct fib_nh *fib_nh; | |
236 | }; | |
237 | ||
7c550daf | 238 | int call_fib4_notifier(struct notifier_block *nb, |
04b1d4e5 | 239 | enum fib_event_type event_type, |
b90eb754 | 240 | struct fib_notifier_info *info); |
04b1d4e5 IS |
241 | int call_fib4_notifiers(struct net *net, enum fib_event_type event_type, |
242 | struct fib_notifier_info *info); | |
243 | ||
244 | int __net_init fib4_notifier_init(struct net *net); | |
245 | void __net_exit fib4_notifier_exit(struct net *net); | |
b90eb754 | 246 | |
1bff1a0c | 247 | void fib_info_notify_update(struct net *net, struct nl_info *info); |
b7a59557 JP |
248 | int fib_notify(struct net *net, struct notifier_block *nb, |
249 | struct netlink_ext_ack *extack); | |
c0243892 | 250 | |
1da177e4 | 251 | struct fib_table { |
8e773277 DM |
252 | struct hlist_node tb_hlist; |
253 | u32 tb_id; | |
8e773277 | 254 | int tb_num_default; |
a7e53531 | 255 | struct rcu_head rcu; |
0ddcf43d | 256 | unsigned long *tb_data; |
a5311060 | 257 | unsigned long __data[]; |
1da177e4 LT |
258 | }; |
259 | ||
4724676d DA |
260 | struct fib_dump_filter { |
261 | u32 table_id; | |
262 | /* filter_set is an optimization that an entry is set */ | |
263 | bool filter_set; | |
564c91f7 SB |
264 | bool dump_routes; |
265 | bool dump_exceptions; | |
4724676d DA |
266 | unsigned char protocol; |
267 | unsigned char rt_type; | |
268 | unsigned int flags; | |
269 | struct net_device *dev; | |
270 | }; | |
271 | ||
5c3a0fd7 JP |
272 | int fib_table_lookup(struct fib_table *tb, const struct flowi4 *flp, |
273 | struct fib_result *res, int fib_flags); | |
6d8422a1 DA |
274 | int fib_table_insert(struct net *, struct fib_table *, struct fib_config *, |
275 | struct netlink_ext_ack *extack); | |
78055998 DA |
276 | int fib_table_delete(struct net *, struct fib_table *, struct fib_config *, |
277 | struct netlink_ext_ack *extack); | |
5c3a0fd7 | 278 | int fib_table_dump(struct fib_table *table, struct sk_buff *skb, |
18a8021a | 279 | struct netlink_callback *cb, struct fib_dump_filter *filter); |
f97f4dd8 | 280 | int fib_table_flush(struct net *net, struct fib_table *table, bool flush_all); |
0ddcf43d | 281 | struct fib_table *fib_trie_unmerge(struct fib_table *main_tb); |
3b709334 | 282 | void fib_table_flush_external(struct fib_table *table); |
5c3a0fd7 | 283 | void fib_free_table(struct fib_table *tb); |
4aa2c466 | 284 | |
1da177e4 LT |
285 | #ifndef CONFIG_IP_MULTIPLE_TABLES |
286 | ||
a5a519b2 AD |
287 | #define TABLE_LOCAL_INDEX (RT_TABLE_LOCAL & (FIB_TABLE_HASHSZ - 1)) |
288 | #define TABLE_MAIN_INDEX (RT_TABLE_MAIN & (FIB_TABLE_HASHSZ - 1)) | |
1da177e4 | 289 | |
8ad4942c | 290 | static inline struct fib_table *fib_get_table(struct net *net, u32 id) |
1da177e4 | 291 | { |
a7e53531 | 292 | struct hlist_node *tb_hlist; |
93456b6d DL |
293 | struct hlist_head *ptr; |
294 | ||
295 | ptr = id == RT_TABLE_LOCAL ? | |
e4aef8ae DL |
296 | &net->ipv4.fib_table_hash[TABLE_LOCAL_INDEX] : |
297 | &net->ipv4.fib_table_hash[TABLE_MAIN_INDEX]; | |
a7e53531 AD |
298 | |
299 | tb_hlist = rcu_dereference_rtnl(hlist_first_rcu(ptr)); | |
300 | ||
301 | return hlist_entry(tb_hlist, struct fib_table, tb_hlist); | |
1da177e4 LT |
302 | } |
303 | ||
8ad4942c | 304 | static inline struct fib_table *fib_new_table(struct net *net, u32 id) |
1da177e4 | 305 | { |
8ad4942c | 306 | return fib_get_table(net, id); |
1da177e4 LT |
307 | } |
308 | ||
22bd5b9b | 309 | static inline int fib_lookup(struct net *net, const struct flowi4 *flp, |
0eeb075f | 310 | struct fib_result *res, unsigned int flags) |
1da177e4 | 311 | { |
a7e53531 | 312 | struct fib_table *tb; |
0ddcf43d | 313 | int err = -ENETUNREACH; |
345e9b54 AD |
314 | |
315 | rcu_read_lock(); | |
316 | ||
0ddcf43d | 317 | tb = fib_get_table(net, RT_TABLE_MAIN); |
0315e382 NF |
318 | if (tb) |
319 | err = fib_table_lookup(tb, flp, res, flags | FIB_LOOKUP_NOREF); | |
320 | ||
321 | if (err == -EAGAIN) | |
322 | err = -ENETUNREACH; | |
93456b6d | 323 | |
345e9b54 | 324 | rcu_read_unlock(); |
93456b6d | 325 | |
345e9b54 | 326 | return err; |
1da177e4 LT |
327 | } |
328 | ||
c43c3d76 PA |
329 | static inline bool fib4_has_custom_rules(const struct net *net) |
330 | { | |
331 | return false; | |
332 | } | |
333 | ||
3c71006d IS |
334 | static inline bool fib4_rule_default(const struct fib_rule *rule) |
335 | { | |
336 | return true; | |
337 | } | |
338 | ||
b7a59557 JP |
339 | static inline int fib4_rules_dump(struct net *net, struct notifier_block *nb, |
340 | struct netlink_ext_ack *extack) | |
1b2a4440 IS |
341 | { |
342 | return 0; | |
343 | } | |
344 | ||
345 | static inline unsigned int fib4_rules_seq_read(struct net *net) | |
346 | { | |
347 | return 0; | |
348 | } | |
349 | ||
e37b1e97 RP |
350 | static inline bool fib4_rules_early_flow_dissect(struct net *net, |
351 | struct sk_buff *skb, | |
352 | struct flowi4 *fl4, | |
353 | struct flow_keys *flkeys) | |
354 | { | |
355 | return false; | |
356 | } | |
1da177e4 | 357 | #else /* CONFIG_IP_MULTIPLE_TABLES */ |
5c3a0fd7 JP |
358 | int __net_init fib4_rules_init(struct net *net); |
359 | void __net_exit fib4_rules_exit(struct net *net); | |
c3e9a353 | 360 | |
5c3a0fd7 JP |
361 | struct fib_table *fib_new_table(struct net *net, u32 id); |
362 | struct fib_table *fib_get_table(struct net *net, u32 id); | |
1da177e4 | 363 | |
0eeb075f AG |
364 | int __fib_lookup(struct net *net, struct flowi4 *flp, |
365 | struct fib_result *res, unsigned int flags); | |
f4530fa5 DM |
366 | |
367 | static inline int fib_lookup(struct net *net, struct flowi4 *flp, | |
0eeb075f | 368 | struct fib_result *res, unsigned int flags) |
f4530fa5 | 369 | { |
a7e53531 | 370 | struct fib_table *tb; |
0315e382 | 371 | int err = -ENETUNREACH; |
a7e53531 | 372 | |
0eeb075f | 373 | flags |= FIB_LOOKUP_NOREF; |
a7e53531 | 374 | if (net->ipv4.fib_has_custom_rules) |
0eeb075f | 375 | return __fib_lookup(net, flp, res, flags); |
a7e53531 AD |
376 | |
377 | rcu_read_lock(); | |
378 | ||
379 | res->tclassid = 0; | |
380 | ||
0315e382 NF |
381 | tb = rcu_dereference_rtnl(net->ipv4.fib_main); |
382 | if (tb) | |
383 | err = fib_table_lookup(tb, flp, res, flags); | |
384 | ||
385 | if (!err) | |
386 | goto out; | |
387 | ||
388 | tb = rcu_dereference_rtnl(net->ipv4.fib_default); | |
389 | if (tb) | |
390 | err = fib_table_lookup(tb, flp, res, flags); | |
a7e53531 | 391 | |
0315e382 NF |
392 | out: |
393 | if (err == -EAGAIN) | |
394 | err = -ENETUNREACH; | |
a7e53531 AD |
395 | |
396 | rcu_read_unlock(); | |
397 | ||
398 | return err; | |
f4530fa5 DM |
399 | } |
400 | ||
c43c3d76 PA |
401 | static inline bool fib4_has_custom_rules(const struct net *net) |
402 | { | |
403 | return net->ipv4.fib_has_custom_rules; | |
404 | } | |
405 | ||
3c71006d | 406 | bool fib4_rule_default(const struct fib_rule *rule); |
b7a59557 JP |
407 | int fib4_rules_dump(struct net *net, struct notifier_block *nb, |
408 | struct netlink_ext_ack *extack); | |
1b2a4440 | 409 | unsigned int fib4_rules_seq_read(struct net *net); |
3c71006d | 410 | |
e37b1e97 RP |
411 | static inline bool fib4_rules_early_flow_dissect(struct net *net, |
412 | struct sk_buff *skb, | |
413 | struct flowi4 *fl4, | |
414 | struct flow_keys *flkeys) | |
415 | { | |
416 | unsigned int flag = FLOW_DISSECTOR_F_STOP_AT_ENCAP; | |
417 | ||
418 | if (!net->ipv4.fib_rules_require_fldissect) | |
419 | return false; | |
420 | ||
421 | skb_flow_dissect_flow_keys(skb, flkeys, flag); | |
422 | fl4->fl4_sport = flkeys->ports.src; | |
423 | fl4->fl4_dport = flkeys->ports.dst; | |
424 | fl4->flowi4_proto = flkeys->basic.ip_proto; | |
425 | ||
426 | return true; | |
427 | } | |
428 | ||
1da177e4 LT |
429 | #endif /* CONFIG_IP_MULTIPLE_TABLES */ |
430 | ||
431 | /* Exported by fib_frontend.c */ | |
ef7c79ed | 432 | extern const struct nla_policy rtm_ipv4_policy[]; |
5c3a0fd7 | 433 | void ip_fib_init(void); |
d1566268 DA |
434 | int fib_gw_from_via(struct fib_config *cfg, struct nlattr *nla, |
435 | struct netlink_ext_ack *extack); | |
5c3a0fd7 | 436 | __be32 fib_compute_spec_dst(struct sk_buff *skb); |
78f2756c | 437 | bool fib_info_nh_uses_dev(struct fib_info *fi, const struct net_device *dev); |
5c3a0fd7 JP |
438 | int fib_validate_source(struct sk_buff *skb, __be32 src, __be32 dst, |
439 | u8 tos, int oif, struct net_device *dev, | |
440 | struct in_device *idev, u32 *itag); | |
7a9bc9b8 | 441 | #ifdef CONFIG_IP_ROUTE_CLASSID |
f4530fa5 DM |
442 | static inline int fib_num_tclassid_users(struct net *net) |
443 | { | |
213f5f8f | 444 | return atomic_read(&net->ipv4.fib_num_tclassid_users); |
f4530fa5 | 445 | } |
7a9bc9b8 | 446 | #else |
f4530fa5 DM |
447 | static inline int fib_num_tclassid_users(struct net *net) |
448 | { | |
449 | return 0; | |
450 | } | |
7a9bc9b8 | 451 | #endif |
0ddcf43d | 452 | int fib_unmerge(struct net *net); |
14c85021 | 453 | |
1fd1c768 DA |
454 | static inline bool nhc_l3mdev_matches_dev(const struct fib_nh_common *nhc, |
455 | const struct net_device *dev) | |
456 | { | |
457 | if (nhc->nhc_dev == dev || | |
458 | l3mdev_master_ifindex_rcu(nhc->nhc_dev) == dev->ifindex) | |
459 | return true; | |
460 | ||
461 | return false; | |
462 | } | |
463 | ||
1da177e4 | 464 | /* Exported by fib_semantics.c */ |
5c3a0fd7 | 465 | int ip_fib_check_default(__be32 gw, struct net_device *dev); |
4f823def | 466 | int fib_sync_down_dev(struct net_device *dev, unsigned long event, bool force); |
5a56a0b3 | 467 | int fib_sync_down_addr(struct net_device *dev, __be32 local); |
ecc5663c | 468 | int fib_sync_up(struct net_device *dev, unsigned char nh_flags); |
af7d6cce | 469 | void fib_sync_mtu(struct net_device *dev, u32 orig_mtu); |
06c77c3e | 470 | void fib_nhc_update_mtu(struct fib_nh_common *nhc, u32 new, u32 orig); |
0e884c78 | 471 | |
ce5c9c20 IS |
472 | /* Fields used for sysctl_fib_multipath_hash_fields. |
473 | * Common to IPv4 and IPv6. | |
474 | * | |
475 | * Add new fields at the end. This is user API. | |
476 | */ | |
477 | #define FIB_MULTIPATH_HASH_FIELD_SRC_IP BIT(0) | |
478 | #define FIB_MULTIPATH_HASH_FIELD_DST_IP BIT(1) | |
479 | #define FIB_MULTIPATH_HASH_FIELD_IP_PROTO BIT(2) | |
480 | #define FIB_MULTIPATH_HASH_FIELD_FLOWLABEL BIT(3) | |
481 | #define FIB_MULTIPATH_HASH_FIELD_SRC_PORT BIT(4) | |
482 | #define FIB_MULTIPATH_HASH_FIELD_DST_PORT BIT(5) | |
483 | #define FIB_MULTIPATH_HASH_FIELD_INNER_SRC_IP BIT(6) | |
484 | #define FIB_MULTIPATH_HASH_FIELD_INNER_DST_IP BIT(7) | |
485 | #define FIB_MULTIPATH_HASH_FIELD_INNER_IP_PROTO BIT(8) | |
486 | #define FIB_MULTIPATH_HASH_FIELD_INNER_FLOWLABEL BIT(9) | |
487 | #define FIB_MULTIPATH_HASH_FIELD_INNER_SRC_PORT BIT(10) | |
488 | #define FIB_MULTIPATH_HASH_FIELD_INNER_DST_PORT BIT(11) | |
489 | ||
490 | #define FIB_MULTIPATH_HASH_FIELD_OUTER_MASK \ | |
491 | (FIB_MULTIPATH_HASH_FIELD_SRC_IP | \ | |
492 | FIB_MULTIPATH_HASH_FIELD_DST_IP | \ | |
493 | FIB_MULTIPATH_HASH_FIELD_IP_PROTO | \ | |
494 | FIB_MULTIPATH_HASH_FIELD_FLOWLABEL | \ | |
495 | FIB_MULTIPATH_HASH_FIELD_SRC_PORT | \ | |
496 | FIB_MULTIPATH_HASH_FIELD_DST_PORT) | |
497 | ||
498 | #define FIB_MULTIPATH_HASH_FIELD_INNER_MASK \ | |
499 | (FIB_MULTIPATH_HASH_FIELD_INNER_SRC_IP | \ | |
500 | FIB_MULTIPATH_HASH_FIELD_INNER_DST_IP | \ | |
501 | FIB_MULTIPATH_HASH_FIELD_INNER_IP_PROTO | \ | |
502 | FIB_MULTIPATH_HASH_FIELD_INNER_FLOWLABEL | \ | |
503 | FIB_MULTIPATH_HASH_FIELD_INNER_SRC_PORT | \ | |
504 | FIB_MULTIPATH_HASH_FIELD_INNER_DST_PORT) | |
505 | ||
506 | #define FIB_MULTIPATH_HASH_FIELD_ALL_MASK \ | |
507 | (FIB_MULTIPATH_HASH_FIELD_OUTER_MASK | \ | |
508 | FIB_MULTIPATH_HASH_FIELD_INNER_MASK) | |
509 | ||
510 | #define FIB_MULTIPATH_HASH_FIELD_DEFAULT_MASK \ | |
511 | (FIB_MULTIPATH_HASH_FIELD_SRC_IP | \ | |
512 | FIB_MULTIPATH_HASH_FIELD_DST_IP | \ | |
513 | FIB_MULTIPATH_HASH_FIELD_IP_PROTO) | |
514 | ||
bf4e0a3d | 515 | #ifdef CONFIG_IP_ROUTE_MULTIPATH |
7efc0b6b | 516 | int fib_multipath_hash(const struct net *net, const struct flowi4 *fl4, |
e37b1e97 | 517 | const struct sk_buff *skb, struct flow_keys *flkeys); |
bf4e0a3d | 518 | #endif |
ac1fab2d DA |
519 | int fib_check_nh(struct net *net, struct fib_nh *nh, u32 table, u8 scope, |
520 | struct netlink_ext_ack *extack); | |
0e884c78 | 521 | void fib_select_multipath(struct fib_result *res, int hash); |
3ce58d84 | 522 | void fib_select_path(struct net *net, struct fib_result *res, |
bf4e0a3d | 523 | struct flowi4 *fl4, const struct sk_buff *skb); |
1da177e4 | 524 | |
e4516ef6 DA |
525 | int fib_nh_init(struct net *net, struct fib_nh *fib_nh, |
526 | struct fib_config *cfg, int nh_weight, | |
527 | struct netlink_ext_ack *extack); | |
faa041a4 | 528 | void fib_nh_release(struct net *net, struct fib_nh *fib_nh); |
faee6769 AA |
529 | int fib_nh_common_init(struct net *net, struct fib_nh_common *nhc, |
530 | struct nlattr *fc_encap, u16 fc_encap_type, | |
531 | void *cfg, gfp_t gfp_flags, | |
979e276e DA |
532 | struct netlink_ext_ack *extack); |
533 | void fib_nh_common_release(struct fib_nh_common *nhc); | |
e4516ef6 | 534 | |
5348ba85 | 535 | /* Exported by fib_trie.c */ |
90b93f1b | 536 | void fib_alias_hw_flags_set(struct net *net, const struct fib_rt_info *fri); |
5c3a0fd7 | 537 | void fib_trie_init(void); |
0ddcf43d | 538 | struct fib_table *fib_trie_table(u32 id, struct fib_table *alias); |
af7888ad DA |
539 | bool fib_lookup_good_nhc(const struct fib_nh_common *nhc, int fib_flags, |
540 | const struct flowi4 *flp); | |
1da177e4 | 541 | |
b6bf3ca0 | 542 | static inline void fib_combine_itag(u32 *itag, const struct fib_result *res) |
1da177e4 | 543 | { |
c7066f70 | 544 | #ifdef CONFIG_IP_ROUTE_CLASSID |
eba618ab | 545 | struct fib_nh_common *nhc = res->nhc; |
1da177e4 LT |
546 | #ifdef CONFIG_IP_MULTIPLE_TABLES |
547 | u32 rtag; | |
548 | #endif | |
dcb1ecb5 DA |
549 | if (nhc->nhc_family == AF_INET) { |
550 | struct fib_nh *nh; | |
551 | ||
552 | nh = container_of(nhc, struct fib_nh, nh_common); | |
553 | *itag = nh->nh_tclassid << 16; | |
554 | } else { | |
555 | *itag = 0; | |
556 | } | |
557 | ||
1da177e4 | 558 | #ifdef CONFIG_IP_MULTIPLE_TABLES |
85b91b03 | 559 | rtag = res->tclassid; |
1da177e4 LT |
560 | if (*itag == 0) |
561 | *itag = (rtag<<16); | |
562 | *itag |= (rtag>>16); | |
563 | #endif | |
564 | #endif | |
565 | } | |
566 | ||
9bd83667 | 567 | void fib_flush(struct net *net); |
5c3a0fd7 | 568 | void free_fib_info(struct fib_info *fi); |
1da177e4 | 569 | |
1c677b3d IS |
570 | static inline void fib_info_hold(struct fib_info *fi) |
571 | { | |
0029c0de | 572 | refcount_inc(&fi->fib_clntref); |
1c677b3d IS |
573 | } |
574 | ||
1da177e4 LT |
575 | static inline void fib_info_put(struct fib_info *fi) |
576 | { | |
0029c0de | 577 | if (refcount_dec_and_test(&fi->fib_clntref)) |
1da177e4 LT |
578 | free_fib_info(fi); |
579 | } | |
580 | ||
20380731 | 581 | #ifdef CONFIG_PROC_FS |
5c3a0fd7 JP |
582 | int __net_init fib_proc_init(struct net *net); |
583 | void __net_exit fib_proc_exit(struct net *net); | |
cc8274f5 LZ |
584 | #else |
585 | static inline int fib_proc_init(struct net *net) | |
586 | { | |
587 | return 0; | |
588 | } | |
589 | static inline void fib_proc_exit(struct net *net) | |
590 | { | |
591 | } | |
20380731 ACM |
592 | #endif |
593 | ||
50d889b1 DA |
594 | u32 ip_mtu_from_fib_result(struct fib_result *res, __be32 daddr); |
595 | ||
4724676d DA |
596 | int ip_valid_fib_dump_req(struct net *net, const struct nlmsghdr *nlh, |
597 | struct fib_dump_filter *filter, | |
effe6792 | 598 | struct netlink_callback *cb); |
c0a72077 DA |
599 | |
600 | int fib_nexthop_info(struct sk_buff *skb, const struct fib_nh_common *nh, | |
7bdf4de1 | 601 | u8 rt_family, unsigned char *flags, bool skip_oif); |
c0a72077 | 602 | int fib_add_nexthop(struct sk_buff *skb, const struct fib_nh_common *nh, |
597aa16c | 603 | int nh_weight, u8 rt_family, u32 nh_tclassid); |
1da177e4 | 604 | #endif /* _NET_FIB_H */ |