Commit | Line | Data |
---|---|---|
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; |
4b2b6060 | 157 | bool pfsrc_removed; |
4c7e8084 | 158 | struct nexthop *nh; |
ebc0ffae | 159 | struct rcu_head rcu; |
5b98fd5d | 160 | struct fib_nh fib_nh[] __counted_by(fib_nhs); |
1da177e4 LT |
161 | }; |
162 | ||
163 | ||
164 | #ifdef CONFIG_IP_MULTIPLE_TABLES | |
165 | struct fib_rule; | |
166 | #endif | |
167 | ||
5b470441 | 168 | struct fib_table; |
1da177e4 | 169 | struct fib_result { |
eba618ab DA |
170 | __be32 prefix; |
171 | unsigned char prefixlen; | |
172 | unsigned char nh_sel; | |
173 | unsigned char type; | |
174 | unsigned char scope; | |
175 | u32 tclassid; | |
176 | struct fib_nh_common *nhc; | |
177 | struct fib_info *fi; | |
178 | struct fib_table *table; | |
179 | struct hlist_head *fa_head; | |
1da177e4 LT |
180 | }; |
181 | ||
246955fe | 182 | struct fib_result_nl { |
80e856e1 | 183 | __be32 fl_addr; /* To be looked up*/ |
5f300893 | 184 | u32 fl_mark; |
246955fe RO |
185 | unsigned char fl_tos; |
186 | unsigned char fl_scope; | |
187 | unsigned char tb_id_in; | |
188 | ||
189 | unsigned char tb_id; /* Results */ | |
190 | unsigned char prefixlen; | |
191 | unsigned char nh_sel; | |
192 | unsigned char type; | |
193 | unsigned char scope; | |
82695b30 | 194 | int err; |
246955fe | 195 | }; |
1da177e4 | 196 | |
5b9e12db | 197 | #ifdef CONFIG_IP_MULTIPLE_TABLES |
93456b6d | 198 | #define FIB_TABLE_HASHSZ 256 |
5b9e12db DL |
199 | #else |
200 | #define FIB_TABLE_HASHSZ 2 | |
201 | #endif | |
1da177e4 | 202 | |
dcb1ecb5 DA |
203 | __be32 fib_info_update_nhc_saddr(struct net *net, struct fib_nh_common *nhc, |
204 | unsigned char scope); | |
eba618ab | 205 | __be32 fib_result_prefsrc(struct net *net, struct fib_result *res); |
436c3b66 | 206 | |
eba618ab DA |
207 | #define FIB_RES_NHC(res) ((res).nhc) |
208 | #define FIB_RES_DEV(res) (FIB_RES_NHC(res)->nhc_dev) | |
209 | #define FIB_RES_OIF(res) (FIB_RES_NHC(res)->nhc_oif) | |
1fc050a1 | 210 | |
1e301fd0 IS |
211 | struct fib_rt_info { |
212 | struct fib_info *fi; | |
213 | u32 tb_id; | |
214 | __be32 dst; | |
215 | int dst_len; | |
888ade8f | 216 | dscp_t dscp; |
1e301fd0 | 217 | u8 type; |
90b93f1b IS |
218 | u8 offload:1, |
219 | trap:1, | |
36c5100e AC |
220 | offload_failed:1, |
221 | unused:5; | |
1e301fd0 IS |
222 | }; |
223 | ||
b90eb754 JP |
224 | struct fib_entry_notifier_info { |
225 | struct fib_notifier_info info; /* must be first */ | |
226 | u32 dst; | |
227 | int dst_len; | |
228 | struct fib_info *fi; | |
568a3f33 | 229 | dscp_t dscp; |
b90eb754 JP |
230 | u8 type; |
231 | u32 tb_id; | |
b90eb754 JP |
232 | }; |
233 | ||
982acb97 IS |
234 | struct fib_nh_notifier_info { |
235 | struct fib_notifier_info info; /* must be first */ | |
236 | struct fib_nh *fib_nh; | |
237 | }; | |
238 | ||
7c550daf | 239 | int call_fib4_notifier(struct notifier_block *nb, |
04b1d4e5 | 240 | enum fib_event_type event_type, |
b90eb754 | 241 | struct fib_notifier_info *info); |
04b1d4e5 IS |
242 | int call_fib4_notifiers(struct net *net, enum fib_event_type event_type, |
243 | struct fib_notifier_info *info); | |
244 | ||
245 | int __net_init fib4_notifier_init(struct net *net); | |
246 | void __net_exit fib4_notifier_exit(struct net *net); | |
b90eb754 | 247 | |
1bff1a0c | 248 | void fib_info_notify_update(struct net *net, struct nl_info *info); |
b7a59557 JP |
249 | int fib_notify(struct net *net, struct notifier_block *nb, |
250 | struct netlink_ext_ack *extack); | |
c0243892 | 251 | |
1da177e4 | 252 | struct fib_table { |
8e773277 DM |
253 | struct hlist_node tb_hlist; |
254 | u32 tb_id; | |
8e773277 | 255 | int tb_num_default; |
a7e53531 | 256 | struct rcu_head rcu; |
0ddcf43d | 257 | unsigned long *tb_data; |
a5311060 | 258 | unsigned long __data[]; |
1da177e4 LT |
259 | }; |
260 | ||
4724676d DA |
261 | struct fib_dump_filter { |
262 | u32 table_id; | |
263 | /* filter_set is an optimization that an entry is set */ | |
264 | bool filter_set; | |
564c91f7 SB |
265 | bool dump_routes; |
266 | bool dump_exceptions; | |
4724676d DA |
267 | unsigned char protocol; |
268 | unsigned char rt_type; | |
269 | unsigned int flags; | |
270 | struct net_device *dev; | |
271 | }; | |
272 | ||
5c3a0fd7 JP |
273 | int fib_table_lookup(struct fib_table *tb, const struct flowi4 *flp, |
274 | struct fib_result *res, int fib_flags); | |
6d8422a1 DA |
275 | int fib_table_insert(struct net *, struct fib_table *, struct fib_config *, |
276 | struct netlink_ext_ack *extack); | |
78055998 DA |
277 | int fib_table_delete(struct net *, struct fib_table *, struct fib_config *, |
278 | struct netlink_ext_ack *extack); | |
5c3a0fd7 | 279 | int fib_table_dump(struct fib_table *table, struct sk_buff *skb, |
18a8021a | 280 | struct netlink_callback *cb, struct fib_dump_filter *filter); |
f97f4dd8 | 281 | int fib_table_flush(struct net *net, struct fib_table *table, bool flush_all); |
0ddcf43d | 282 | struct fib_table *fib_trie_unmerge(struct fib_table *main_tb); |
3b709334 | 283 | void fib_table_flush_external(struct fib_table *table); |
5c3a0fd7 | 284 | void fib_free_table(struct fib_table *tb); |
4aa2c466 | 285 | |
1da177e4 LT |
286 | #ifndef CONFIG_IP_MULTIPLE_TABLES |
287 | ||
a5a519b2 AD |
288 | #define TABLE_LOCAL_INDEX (RT_TABLE_LOCAL & (FIB_TABLE_HASHSZ - 1)) |
289 | #define TABLE_MAIN_INDEX (RT_TABLE_MAIN & (FIB_TABLE_HASHSZ - 1)) | |
1da177e4 | 290 | |
8ad4942c | 291 | static inline struct fib_table *fib_get_table(struct net *net, u32 id) |
1da177e4 | 292 | { |
a7e53531 | 293 | struct hlist_node *tb_hlist; |
93456b6d DL |
294 | struct hlist_head *ptr; |
295 | ||
296 | ptr = id == RT_TABLE_LOCAL ? | |
e4aef8ae DL |
297 | &net->ipv4.fib_table_hash[TABLE_LOCAL_INDEX] : |
298 | &net->ipv4.fib_table_hash[TABLE_MAIN_INDEX]; | |
a7e53531 AD |
299 | |
300 | tb_hlist = rcu_dereference_rtnl(hlist_first_rcu(ptr)); | |
301 | ||
302 | return hlist_entry(tb_hlist, struct fib_table, tb_hlist); | |
1da177e4 LT |
303 | } |
304 | ||
8ad4942c | 305 | static inline struct fib_table *fib_new_table(struct net *net, u32 id) |
1da177e4 | 306 | { |
8ad4942c | 307 | return fib_get_table(net, id); |
1da177e4 LT |
308 | } |
309 | ||
22bd5b9b | 310 | static inline int fib_lookup(struct net *net, const struct flowi4 *flp, |
0eeb075f | 311 | struct fib_result *res, unsigned int flags) |
1da177e4 | 312 | { |
a7e53531 | 313 | struct fib_table *tb; |
0ddcf43d | 314 | int err = -ENETUNREACH; |
345e9b54 AD |
315 | |
316 | rcu_read_lock(); | |
317 | ||
0ddcf43d | 318 | tb = fib_get_table(net, RT_TABLE_MAIN); |
0315e382 NF |
319 | if (tb) |
320 | err = fib_table_lookup(tb, flp, res, flags | FIB_LOOKUP_NOREF); | |
321 | ||
322 | if (err == -EAGAIN) | |
323 | err = -ENETUNREACH; | |
93456b6d | 324 | |
345e9b54 | 325 | rcu_read_unlock(); |
93456b6d | 326 | |
345e9b54 | 327 | return err; |
1da177e4 LT |
328 | } |
329 | ||
c43c3d76 PA |
330 | static inline bool fib4_has_custom_rules(const struct net *net) |
331 | { | |
332 | return false; | |
333 | } | |
334 | ||
3c71006d IS |
335 | static inline bool fib4_rule_default(const struct fib_rule *rule) |
336 | { | |
337 | return true; | |
338 | } | |
339 | ||
b7a59557 JP |
340 | static inline int fib4_rules_dump(struct net *net, struct notifier_block *nb, |
341 | struct netlink_ext_ack *extack) | |
1b2a4440 IS |
342 | { |
343 | return 0; | |
344 | } | |
345 | ||
346 | static inline unsigned int fib4_rules_seq_read(struct net *net) | |
347 | { | |
348 | return 0; | |
349 | } | |
350 | ||
e37b1e97 RP |
351 | static inline bool fib4_rules_early_flow_dissect(struct net *net, |
352 | struct sk_buff *skb, | |
353 | struct flowi4 *fl4, | |
354 | struct flow_keys *flkeys) | |
355 | { | |
356 | return false; | |
357 | } | |
1da177e4 | 358 | #else /* CONFIG_IP_MULTIPLE_TABLES */ |
5c3a0fd7 JP |
359 | int __net_init fib4_rules_init(struct net *net); |
360 | void __net_exit fib4_rules_exit(struct net *net); | |
c3e9a353 | 361 | |
5c3a0fd7 JP |
362 | struct fib_table *fib_new_table(struct net *net, u32 id); |
363 | struct fib_table *fib_get_table(struct net *net, u32 id); | |
1da177e4 | 364 | |
0eeb075f AG |
365 | int __fib_lookup(struct net *net, struct flowi4 *flp, |
366 | struct fib_result *res, unsigned int flags); | |
f4530fa5 DM |
367 | |
368 | static inline int fib_lookup(struct net *net, struct flowi4 *flp, | |
0eeb075f | 369 | struct fib_result *res, unsigned int flags) |
f4530fa5 | 370 | { |
a7e53531 | 371 | struct fib_table *tb; |
0315e382 | 372 | int err = -ENETUNREACH; |
a7e53531 | 373 | |
0eeb075f | 374 | flags |= FIB_LOOKUP_NOREF; |
a7e53531 | 375 | if (net->ipv4.fib_has_custom_rules) |
0eeb075f | 376 | return __fib_lookup(net, flp, res, flags); |
a7e53531 AD |
377 | |
378 | rcu_read_lock(); | |
379 | ||
380 | res->tclassid = 0; | |
381 | ||
0315e382 NF |
382 | tb = rcu_dereference_rtnl(net->ipv4.fib_main); |
383 | if (tb) | |
384 | err = fib_table_lookup(tb, flp, res, flags); | |
385 | ||
386 | if (!err) | |
387 | goto out; | |
388 | ||
389 | tb = rcu_dereference_rtnl(net->ipv4.fib_default); | |
390 | if (tb) | |
391 | err = fib_table_lookup(tb, flp, res, flags); | |
a7e53531 | 392 | |
0315e382 NF |
393 | out: |
394 | if (err == -EAGAIN) | |
395 | err = -ENETUNREACH; | |
a7e53531 AD |
396 | |
397 | rcu_read_unlock(); | |
398 | ||
399 | return err; | |
f4530fa5 DM |
400 | } |
401 | ||
c43c3d76 PA |
402 | static inline bool fib4_has_custom_rules(const struct net *net) |
403 | { | |
404 | return net->ipv4.fib_has_custom_rules; | |
405 | } | |
406 | ||
3c71006d | 407 | bool fib4_rule_default(const struct fib_rule *rule); |
b7a59557 JP |
408 | int fib4_rules_dump(struct net *net, struct notifier_block *nb, |
409 | struct netlink_ext_ack *extack); | |
1b2a4440 | 410 | unsigned int fib4_rules_seq_read(struct net *net); |
3c71006d | 411 | |
e37b1e97 RP |
412 | static inline bool fib4_rules_early_flow_dissect(struct net *net, |
413 | struct sk_buff *skb, | |
414 | struct flowi4 *fl4, | |
415 | struct flow_keys *flkeys) | |
416 | { | |
417 | unsigned int flag = FLOW_DISSECTOR_F_STOP_AT_ENCAP; | |
418 | ||
419 | if (!net->ipv4.fib_rules_require_fldissect) | |
420 | return false; | |
421 | ||
8aae7625 FW |
422 | memset(flkeys, 0, sizeof(*flkeys)); |
423 | __skb_flow_dissect(net, skb, &flow_keys_dissector, | |
424 | flkeys, NULL, 0, 0, 0, flag); | |
425 | ||
e37b1e97 RP |
426 | fl4->fl4_sport = flkeys->ports.src; |
427 | fl4->fl4_dport = flkeys->ports.dst; | |
428 | fl4->flowi4_proto = flkeys->basic.ip_proto; | |
429 | ||
430 | return true; | |
431 | } | |
432 | ||
1da177e4 LT |
433 | #endif /* CONFIG_IP_MULTIPLE_TABLES */ |
434 | ||
435 | /* Exported by fib_frontend.c */ | |
ef7c79ed | 436 | extern const struct nla_policy rtm_ipv4_policy[]; |
5c3a0fd7 | 437 | void ip_fib_init(void); |
d1566268 DA |
438 | int fib_gw_from_via(struct fib_config *cfg, struct nlattr *nla, |
439 | struct netlink_ext_ack *extack); | |
5c3a0fd7 | 440 | __be32 fib_compute_spec_dst(struct sk_buff *skb); |
78f2756c | 441 | bool fib_info_nh_uses_dev(struct fib_info *fi, const struct net_device *dev); |
5c3a0fd7 JP |
442 | int fib_validate_source(struct sk_buff *skb, __be32 src, __be32 dst, |
443 | u8 tos, int oif, struct net_device *dev, | |
444 | struct in_device *idev, u32 *itag); | |
7a9bc9b8 | 445 | #ifdef CONFIG_IP_ROUTE_CLASSID |
f4530fa5 DM |
446 | static inline int fib_num_tclassid_users(struct net *net) |
447 | { | |
213f5f8f | 448 | return atomic_read(&net->ipv4.fib_num_tclassid_users); |
f4530fa5 | 449 | } |
7a9bc9b8 | 450 | #else |
f4530fa5 DM |
451 | static inline int fib_num_tclassid_users(struct net *net) |
452 | { | |
453 | return 0; | |
454 | } | |
7a9bc9b8 | 455 | #endif |
0ddcf43d | 456 | int fib_unmerge(struct net *net); |
14c85021 | 457 | |
1fd1c768 DA |
458 | static inline bool nhc_l3mdev_matches_dev(const struct fib_nh_common *nhc, |
459 | const struct net_device *dev) | |
460 | { | |
461 | if (nhc->nhc_dev == dev || | |
462 | l3mdev_master_ifindex_rcu(nhc->nhc_dev) == dev->ifindex) | |
463 | return true; | |
464 | ||
465 | return false; | |
466 | } | |
467 | ||
1da177e4 | 468 | /* Exported by fib_semantics.c */ |
5c3a0fd7 | 469 | int ip_fib_check_default(__be32 gw, struct net_device *dev); |
4f823def | 470 | int fib_sync_down_dev(struct net_device *dev, unsigned long event, bool force); |
5a56a0b3 | 471 | int fib_sync_down_addr(struct net_device *dev, __be32 local); |
ecc5663c | 472 | int fib_sync_up(struct net_device *dev, unsigned char nh_flags); |
af7d6cce | 473 | void fib_sync_mtu(struct net_device *dev, u32 orig_mtu); |
06c77c3e | 474 | void fib_nhc_update_mtu(struct fib_nh_common *nhc, u32 new, u32 orig); |
0e884c78 | 475 | |
ce5c9c20 IS |
476 | /* Fields used for sysctl_fib_multipath_hash_fields. |
477 | * Common to IPv4 and IPv6. | |
478 | * | |
479 | * Add new fields at the end. This is user API. | |
480 | */ | |
481 | #define FIB_MULTIPATH_HASH_FIELD_SRC_IP BIT(0) | |
482 | #define FIB_MULTIPATH_HASH_FIELD_DST_IP BIT(1) | |
483 | #define FIB_MULTIPATH_HASH_FIELD_IP_PROTO BIT(2) | |
484 | #define FIB_MULTIPATH_HASH_FIELD_FLOWLABEL BIT(3) | |
485 | #define FIB_MULTIPATH_HASH_FIELD_SRC_PORT BIT(4) | |
486 | #define FIB_MULTIPATH_HASH_FIELD_DST_PORT BIT(5) | |
487 | #define FIB_MULTIPATH_HASH_FIELD_INNER_SRC_IP BIT(6) | |
488 | #define FIB_MULTIPATH_HASH_FIELD_INNER_DST_IP BIT(7) | |
489 | #define FIB_MULTIPATH_HASH_FIELD_INNER_IP_PROTO BIT(8) | |
490 | #define FIB_MULTIPATH_HASH_FIELD_INNER_FLOWLABEL BIT(9) | |
491 | #define FIB_MULTIPATH_HASH_FIELD_INNER_SRC_PORT BIT(10) | |
492 | #define FIB_MULTIPATH_HASH_FIELD_INNER_DST_PORT BIT(11) | |
493 | ||
494 | #define FIB_MULTIPATH_HASH_FIELD_OUTER_MASK \ | |
495 | (FIB_MULTIPATH_HASH_FIELD_SRC_IP | \ | |
496 | FIB_MULTIPATH_HASH_FIELD_DST_IP | \ | |
497 | FIB_MULTIPATH_HASH_FIELD_IP_PROTO | \ | |
498 | FIB_MULTIPATH_HASH_FIELD_FLOWLABEL | \ | |
499 | FIB_MULTIPATH_HASH_FIELD_SRC_PORT | \ | |
500 | FIB_MULTIPATH_HASH_FIELD_DST_PORT) | |
501 | ||
502 | #define FIB_MULTIPATH_HASH_FIELD_INNER_MASK \ | |
503 | (FIB_MULTIPATH_HASH_FIELD_INNER_SRC_IP | \ | |
504 | FIB_MULTIPATH_HASH_FIELD_INNER_DST_IP | \ | |
505 | FIB_MULTIPATH_HASH_FIELD_INNER_IP_PROTO | \ | |
506 | FIB_MULTIPATH_HASH_FIELD_INNER_FLOWLABEL | \ | |
507 | FIB_MULTIPATH_HASH_FIELD_INNER_SRC_PORT | \ | |
508 | FIB_MULTIPATH_HASH_FIELD_INNER_DST_PORT) | |
509 | ||
510 | #define FIB_MULTIPATH_HASH_FIELD_ALL_MASK \ | |
511 | (FIB_MULTIPATH_HASH_FIELD_OUTER_MASK | \ | |
512 | FIB_MULTIPATH_HASH_FIELD_INNER_MASK) | |
513 | ||
514 | #define FIB_MULTIPATH_HASH_FIELD_DEFAULT_MASK \ | |
515 | (FIB_MULTIPATH_HASH_FIELD_SRC_IP | \ | |
516 | FIB_MULTIPATH_HASH_FIELD_DST_IP | \ | |
517 | FIB_MULTIPATH_HASH_FIELD_IP_PROTO) | |
518 | ||
bf4e0a3d | 519 | #ifdef CONFIG_IP_ROUTE_MULTIPATH |
7efc0b6b | 520 | int fib_multipath_hash(const struct net *net, const struct flowi4 *fl4, |
e37b1e97 | 521 | const struct sk_buff *skb, struct flow_keys *flkeys); |
bf4e0a3d | 522 | #endif |
ac1fab2d DA |
523 | int fib_check_nh(struct net *net, struct fib_nh *nh, u32 table, u8 scope, |
524 | struct netlink_ext_ack *extack); | |
0e884c78 | 525 | void fib_select_multipath(struct fib_result *res, int hash); |
3ce58d84 | 526 | void fib_select_path(struct net *net, struct fib_result *res, |
bf4e0a3d | 527 | struct flowi4 *fl4, const struct sk_buff *skb); |
1da177e4 | 528 | |
e4516ef6 DA |
529 | int fib_nh_init(struct net *net, struct fib_nh *fib_nh, |
530 | struct fib_config *cfg, int nh_weight, | |
531 | struct netlink_ext_ack *extack); | |
faa041a4 | 532 | void fib_nh_release(struct net *net, struct fib_nh *fib_nh); |
faee6769 AA |
533 | int fib_nh_common_init(struct net *net, struct fib_nh_common *nhc, |
534 | struct nlattr *fc_encap, u16 fc_encap_type, | |
535 | void *cfg, gfp_t gfp_flags, | |
979e276e DA |
536 | struct netlink_ext_ack *extack); |
537 | void fib_nh_common_release(struct fib_nh_common *nhc); | |
e4516ef6 | 538 | |
5348ba85 | 539 | /* Exported by fib_trie.c */ |
90b93f1b | 540 | void fib_alias_hw_flags_set(struct net *net, const struct fib_rt_info *fri); |
5c3a0fd7 | 541 | void fib_trie_init(void); |
0ddcf43d | 542 | struct fib_table *fib_trie_table(u32 id, struct fib_table *alias); |
af7888ad DA |
543 | bool fib_lookup_good_nhc(const struct fib_nh_common *nhc, int fib_flags, |
544 | const struct flowi4 *flp); | |
1da177e4 | 545 | |
b6bf3ca0 | 546 | static inline void fib_combine_itag(u32 *itag, const struct fib_result *res) |
1da177e4 | 547 | { |
c7066f70 | 548 | #ifdef CONFIG_IP_ROUTE_CLASSID |
eba618ab | 549 | struct fib_nh_common *nhc = res->nhc; |
1da177e4 LT |
550 | #ifdef CONFIG_IP_MULTIPLE_TABLES |
551 | u32 rtag; | |
552 | #endif | |
dcb1ecb5 DA |
553 | if (nhc->nhc_family == AF_INET) { |
554 | struct fib_nh *nh; | |
555 | ||
556 | nh = container_of(nhc, struct fib_nh, nh_common); | |
557 | *itag = nh->nh_tclassid << 16; | |
558 | } else { | |
559 | *itag = 0; | |
560 | } | |
561 | ||
1da177e4 | 562 | #ifdef CONFIG_IP_MULTIPLE_TABLES |
85b91b03 | 563 | rtag = res->tclassid; |
1da177e4 LT |
564 | if (*itag == 0) |
565 | *itag = (rtag<<16); | |
566 | *itag |= (rtag>>16); | |
567 | #endif | |
568 | #endif | |
569 | } | |
570 | ||
9bd83667 | 571 | void fib_flush(struct net *net); |
5c3a0fd7 | 572 | void free_fib_info(struct fib_info *fi); |
1da177e4 | 573 | |
1c677b3d IS |
574 | static inline void fib_info_hold(struct fib_info *fi) |
575 | { | |
0029c0de | 576 | refcount_inc(&fi->fib_clntref); |
1c677b3d IS |
577 | } |
578 | ||
1da177e4 LT |
579 | static inline void fib_info_put(struct fib_info *fi) |
580 | { | |
0029c0de | 581 | if (refcount_dec_and_test(&fi->fib_clntref)) |
1da177e4 LT |
582 | free_fib_info(fi); |
583 | } | |
584 | ||
20380731 | 585 | #ifdef CONFIG_PROC_FS |
5c3a0fd7 JP |
586 | int __net_init fib_proc_init(struct net *net); |
587 | void __net_exit fib_proc_exit(struct net *net); | |
cc8274f5 LZ |
588 | #else |
589 | static inline int fib_proc_init(struct net *net) | |
590 | { | |
591 | return 0; | |
592 | } | |
593 | static inline void fib_proc_exit(struct net *net) | |
594 | { | |
595 | } | |
20380731 ACM |
596 | #endif |
597 | ||
50d889b1 DA |
598 | u32 ip_mtu_from_fib_result(struct fib_result *res, __be32 daddr); |
599 | ||
4724676d DA |
600 | int ip_valid_fib_dump_req(struct net *net, const struct nlmsghdr *nlh, |
601 | struct fib_dump_filter *filter, | |
effe6792 | 602 | struct netlink_callback *cb); |
c0a72077 DA |
603 | |
604 | int fib_nexthop_info(struct sk_buff *skb, const struct fib_nh_common *nh, | |
7bdf4de1 | 605 | u8 rt_family, unsigned char *flags, bool skip_oif); |
c0a72077 | 606 | int fib_add_nexthop(struct sk_buff *skb, const struct fib_nh_common *nh, |
597aa16c | 607 | int nh_weight, u8 rt_family, u32 nh_tclassid); |
1da177e4 | 608 | #endif /* _NET_FIB_H */ |