11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * INET An implementation of the TCP/IP protocol suite for the LINUX 31da177e4SLinus Torvalds * operating system. INET is implemented using the BSD Socket 41da177e4SLinus Torvalds * interface as the means of communication with the user level. 51da177e4SLinus Torvalds * 61da177e4SLinus Torvalds * Definitions for the Forwarding Information Base. 71da177e4SLinus Torvalds * 81da177e4SLinus Torvalds * Authors: A.N.Kuznetsov, <kuznet@ms2.inr.ac.ru> 91da177e4SLinus Torvalds * 101da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or 111da177e4SLinus Torvalds * modify it under the terms of the GNU General Public License 121da177e4SLinus Torvalds * as published by the Free Software Foundation; either version 131da177e4SLinus Torvalds * 2 of the License, or (at your option) any later version. 141da177e4SLinus Torvalds */ 151da177e4SLinus Torvalds 161da177e4SLinus Torvalds #ifndef _NET_IP_FIB_H 171da177e4SLinus Torvalds #define _NET_IP_FIB_H 181da177e4SLinus Torvalds 191da177e4SLinus Torvalds #include <net/flow.h> 201da177e4SLinus Torvalds #include <linux/seq_file.h> 214895c771SDavid S. Miller #include <linux/rcupdate.h> 22e1ef4bf2SThomas Graf #include <net/fib_rules.h> 238e773277SDavid S. Miller #include <net/inetpeer.h> 24d26b3a7cSEric Dumazet #include <linux/percpu.h> 25b90eb754SJiri Pirko #include <linux/notifier.h> 261da177e4SLinus Torvalds 274e902c57SThomas Graf struct fib_config { 284e902c57SThomas Graf u8 fc_dst_len; 294e902c57SThomas Graf u8 fc_tos; 304e902c57SThomas Graf u8 fc_protocol; 314e902c57SThomas Graf u8 fc_scope; 324e902c57SThomas Graf u8 fc_type; 33b52f070cSThomas Graf /* 3 bytes unused */ 344e902c57SThomas Graf u32 fc_table; 356d85c10aSAl Viro __be32 fc_dst; 366d85c10aSAl Viro __be32 fc_gw; 374e902c57SThomas Graf int fc_oif; 384e902c57SThomas Graf u32 fc_flags; 394e902c57SThomas Graf u32 fc_priority; 406d85c10aSAl Viro __be32 fc_prefsrc; 414e902c57SThomas Graf struct nlattr *fc_mx; 424e902c57SThomas Graf struct rtnexthop *fc_mp; 434e902c57SThomas Graf int fc_mx_len; 444e902c57SThomas Graf int fc_mp_len; 454e902c57SThomas Graf u32 fc_flow; 464e902c57SThomas Graf u32 fc_nlflags; 474e902c57SThomas Graf struct nl_info fc_nlinfo; 48571e7226SRoopa Prabhu struct nlattr *fc_encap; 49571e7226SRoopa Prabhu u16 fc_encap_type; 501da177e4SLinus Torvalds }; 511da177e4SLinus Torvalds 521da177e4SLinus Torvalds struct fib_info; 53f2bb4bedSDavid S. Miller struct rtable; 541da177e4SLinus Torvalds 554895c771SDavid S. Miller struct fib_nh_exception { 564895c771SDavid S. Miller struct fib_nh_exception __rcu *fnhe_next; 575aad1de5STimo Teräs int fnhe_genid; 584895c771SDavid S. Miller __be32 fnhe_daddr; 594895c771SDavid S. Miller u32 fnhe_pmtu; 60aee06da6SJulian Anastasov __be32 fnhe_gw; 614895c771SDavid S. Miller unsigned long fnhe_expires; 622ffae99dSTimo Teräs struct rtable __rcu *fnhe_rth_input; 632ffae99dSTimo Teräs struct rtable __rcu *fnhe_rth_output; 644895c771SDavid S. Miller unsigned long fnhe_stamp; 65deed49dfSXin Long struct rcu_head rcu; 664895c771SDavid S. Miller }; 674895c771SDavid S. Miller 684895c771SDavid S. Miller struct fnhe_hash_bucket { 694895c771SDavid S. Miller struct fib_nh_exception __rcu *chain; 704895c771SDavid S. Miller }; 714895c771SDavid S. Miller 72d546c621SEric Dumazet #define FNHE_HASH_SHIFT 11 73d546c621SEric Dumazet #define FNHE_HASH_SIZE (1 << FNHE_HASH_SHIFT) 744895c771SDavid S. Miller #define FNHE_RECLAIM_DEPTH 5 754895c771SDavid S. Miller 761da177e4SLinus Torvalds struct fib_nh { 771da177e4SLinus Torvalds struct net_device *nh_dev; 781da177e4SLinus Torvalds struct hlist_node nh_hash; 791da177e4SLinus Torvalds struct fib_info *nh_parent; 8095c96174SEric Dumazet unsigned int nh_flags; 811da177e4SLinus Torvalds unsigned char nh_scope; 821da177e4SLinus Torvalds #ifdef CONFIG_IP_ROUTE_MULTIPATH 831da177e4SLinus Torvalds int nh_weight; 840e884c78SPeter Nørlund atomic_t nh_upper_bound; 851da177e4SLinus Torvalds #endif 86c7066f70SPatrick McHardy #ifdef CONFIG_IP_ROUTE_CLASSID 871da177e4SLinus Torvalds __u32 nh_tclassid; 881da177e4SLinus Torvalds #endif 891da177e4SLinus Torvalds int nh_oif; 90ed49e3caSAl Viro __be32 nh_gw; 911fc050a1SDavid S. Miller __be32 nh_saddr; 92436c3b66SDavid S. Miller int nh_saddr_genid; 93d26b3a7cSEric Dumazet struct rtable __rcu * __percpu *nh_pcpu_rth_output; 9454764bb6SEric Dumazet struct rtable __rcu *nh_rth_input; 95caa41527SEric Dumazet struct fnhe_hash_bucket __rcu *nh_exceptions; 96571e7226SRoopa Prabhu struct lwtunnel_state *nh_lwtstate; 971da177e4SLinus Torvalds }; 981da177e4SLinus Torvalds 991da177e4SLinus Torvalds /* 1001da177e4SLinus Torvalds * This structure contains data shared by many of routes. 1011da177e4SLinus Torvalds */ 1021da177e4SLinus Torvalds 1031da177e4SLinus Torvalds struct fib_info { 1041da177e4SLinus Torvalds struct hlist_node fib_hash; 1051da177e4SLinus Torvalds struct hlist_node fib_lhash; 1067462bd74SDenis V. Lunev struct net *fib_net; 1071da177e4SLinus Torvalds int fib_treeref; 1081da177e4SLinus Torvalds atomic_t fib_clntref; 10995c96174SEric Dumazet unsigned int fib_flags; 11037e826c5SDavid S. Miller unsigned char fib_dead; 11137e826c5SDavid S. Miller unsigned char fib_protocol; 11237e826c5SDavid S. Miller unsigned char fib_scope; 113f4ef85bbSEric Dumazet unsigned char fib_type; 114b83738aeSAl Viro __be32 fib_prefsrc; 1155a56a0b3SMark Tomlinson u32 fib_tb_id; 1161da177e4SLinus Torvalds u32 fib_priority; 1179c150e82SDavid S. Miller u32 *fib_metrics; 1181da177e4SLinus Torvalds #define fib_mtu fib_metrics[RTAX_MTU-1] 1191da177e4SLinus Torvalds #define fib_window fib_metrics[RTAX_WINDOW-1] 1201da177e4SLinus Torvalds #define fib_rtt fib_metrics[RTAX_RTT-1] 1211da177e4SLinus Torvalds #define fib_advmss fib_metrics[RTAX_ADVMSS-1] 1221da177e4SLinus Torvalds int fib_nhs; 1231da177e4SLinus Torvalds #ifdef CONFIG_IP_ROUTE_MULTIPATH 1240e884c78SPeter Nørlund int fib_weight; 1251da177e4SLinus Torvalds #endif 126c9850187SJiri Pirko unsigned int fib_offload_cnt; 127ebc0ffaeSEric Dumazet struct rcu_head rcu; 1281da177e4SLinus Torvalds struct fib_nh fib_nh[0]; 1291da177e4SLinus Torvalds #define fib_dev fib_nh[0].nh_dev 1301da177e4SLinus Torvalds }; 1311da177e4SLinus Torvalds 1321da177e4SLinus Torvalds 1331da177e4SLinus Torvalds #ifdef CONFIG_IP_MULTIPLE_TABLES 1341da177e4SLinus Torvalds struct fib_rule; 1351da177e4SLinus Torvalds #endif 1361da177e4SLinus Torvalds 1375b470441SDavid S. Miller struct fib_table; 1381da177e4SLinus Torvalds struct fib_result { 1396ffd9034SDavid Ahern __be32 prefix; 1401da177e4SLinus Torvalds unsigned char prefixlen; 1411da177e4SLinus Torvalds unsigned char nh_sel; 1421da177e4SLinus Torvalds unsigned char type; 1431da177e4SLinus Torvalds unsigned char scope; 14485b91b03SDavid S. Miller u32 tclassid; 1451da177e4SLinus Torvalds struct fib_info *fi; 1465b470441SDavid S. Miller struct fib_table *table; 14756315f9eSAlexander Duyck struct hlist_head *fa_head; 1481da177e4SLinus Torvalds }; 1491da177e4SLinus Torvalds 150246955feSRobert Olsson struct fib_result_nl { 15180e856e1SAl Viro __be32 fl_addr; /* To be looked up*/ 1525f300893SThomas Graf u32 fl_mark; 153246955feSRobert Olsson unsigned char fl_tos; 154246955feSRobert Olsson unsigned char fl_scope; 155246955feSRobert Olsson unsigned char tb_id_in; 156246955feSRobert Olsson 157246955feSRobert Olsson unsigned char tb_id; /* Results */ 158246955feSRobert Olsson unsigned char prefixlen; 159246955feSRobert Olsson unsigned char nh_sel; 160246955feSRobert Olsson unsigned char type; 161246955feSRobert Olsson unsigned char scope; 162246955feSRobert Olsson int err; 163246955feSRobert Olsson }; 1641da177e4SLinus Torvalds 1651da177e4SLinus Torvalds #ifdef CONFIG_IP_ROUTE_MULTIPATH 1661da177e4SLinus Torvalds #define FIB_RES_NH(res) ((res).fi->fib_nh[(res).nh_sel]) 1671da177e4SLinus Torvalds #else /* CONFIG_IP_ROUTE_MULTIPATH */ 1681da177e4SLinus Torvalds #define FIB_RES_NH(res) ((res).fi->fib_nh[0]) 1691da177e4SLinus Torvalds #endif /* CONFIG_IP_ROUTE_MULTIPATH */ 1701da177e4SLinus Torvalds 1715b9e12dbSDenis V. Lunev #ifdef CONFIG_IP_MULTIPLE_TABLES 1725b9e12dbSDenis V. Lunev #define FIB_TABLE_HASHSZ 256 1735b9e12dbSDenis V. Lunev #else 1745b9e12dbSDenis V. Lunev #define FIB_TABLE_HASHSZ 2 1755b9e12dbSDenis V. Lunev #endif 1765b9e12dbSDenis V. Lunev 1775c3a0fd7SJoe Perches __be32 fib_info_update_nh_saddr(struct net *net, struct fib_nh *nh); 178436c3b66SDavid S. Miller 179c9850187SJiri Pirko static inline void fib_info_offload_inc(struct fib_info *fi) 180c9850187SJiri Pirko { 181c9850187SJiri Pirko fi->fib_offload_cnt++; 182c9850187SJiri Pirko fi->fib_flags |= RTNH_F_OFFLOAD; 183c9850187SJiri Pirko } 184c9850187SJiri Pirko 185c9850187SJiri Pirko static inline void fib_info_offload_dec(struct fib_info *fi) 186c9850187SJiri Pirko { 187c9850187SJiri Pirko if (--fi->fib_offload_cnt == 0) 188c9850187SJiri Pirko fi->fib_flags &= ~RTNH_F_OFFLOAD; 189c9850187SJiri Pirko } 190c9850187SJiri Pirko 191436c3b66SDavid S. Miller #define FIB_RES_SADDR(net, res) \ 192436c3b66SDavid S. Miller ((FIB_RES_NH(res).nh_saddr_genid == \ 193436c3b66SDavid S. Miller atomic_read(&(net)->ipv4.dev_addr_genid)) ? \ 194436c3b66SDavid S. Miller FIB_RES_NH(res).nh_saddr : \ 195436c3b66SDavid S. Miller fib_info_update_nh_saddr((net), &FIB_RES_NH(res))) 1961da177e4SLinus Torvalds #define FIB_RES_GW(res) (FIB_RES_NH(res).nh_gw) 1971da177e4SLinus Torvalds #define FIB_RES_DEV(res) (FIB_RES_NH(res).nh_dev) 1981da177e4SLinus Torvalds #define FIB_RES_OIF(res) (FIB_RES_NH(res).nh_oif) 1991da177e4SLinus Torvalds 200436c3b66SDavid S. Miller #define FIB_RES_PREFSRC(net, res) ((res).fi->fib_prefsrc ? : \ 201436c3b66SDavid S. Miller FIB_RES_SADDR(net, res)) 2021fc050a1SDavid S. Miller 203b90eb754SJiri Pirko struct fib_notifier_info { 204b90eb754SJiri Pirko struct net *net; 205b90eb754SJiri Pirko }; 206b90eb754SJiri Pirko 207b90eb754SJiri Pirko struct fib_entry_notifier_info { 208b90eb754SJiri Pirko struct fib_notifier_info info; /* must be first */ 209b90eb754SJiri Pirko u32 dst; 210b90eb754SJiri Pirko int dst_len; 211b90eb754SJiri Pirko struct fib_info *fi; 212b90eb754SJiri Pirko u8 tos; 213b90eb754SJiri Pirko u8 type; 214b90eb754SJiri Pirko u32 tb_id; 215b90eb754SJiri Pirko }; 216b90eb754SJiri Pirko 2176a003a5fSIdo Schimmel struct fib_rule_notifier_info { 2186a003a5fSIdo Schimmel struct fib_notifier_info info; /* must be first */ 2196a003a5fSIdo Schimmel struct fib_rule *rule; 2206a003a5fSIdo Schimmel }; 2216a003a5fSIdo Schimmel 222982acb97SIdo Schimmel struct fib_nh_notifier_info { 223982acb97SIdo Schimmel struct fib_notifier_info info; /* must be first */ 224982acb97SIdo Schimmel struct fib_nh *fib_nh; 225982acb97SIdo Schimmel }; 226982acb97SIdo Schimmel 227b90eb754SJiri Pirko enum fib_event_type { 2282f3a5272SIdo Schimmel FIB_EVENT_ENTRY_REPLACE, 2292f3a5272SIdo Schimmel FIB_EVENT_ENTRY_APPEND, 230b90eb754SJiri Pirko FIB_EVENT_ENTRY_ADD, 231b90eb754SJiri Pirko FIB_EVENT_ENTRY_DEL, 232b90eb754SJiri Pirko FIB_EVENT_RULE_ADD, 233b90eb754SJiri Pirko FIB_EVENT_RULE_DEL, 234982acb97SIdo Schimmel FIB_EVENT_NH_ADD, 235982acb97SIdo Schimmel FIB_EVENT_NH_DEL, 236b90eb754SJiri Pirko }; 237b90eb754SJiri Pirko 238c3852ef7SIdo Schimmel int register_fib_notifier(struct notifier_block *nb, 239c3852ef7SIdo Schimmel void (*cb)(struct notifier_block *nb)); 240b90eb754SJiri Pirko int unregister_fib_notifier(struct notifier_block *nb); 241c0243892SIdo Schimmel int call_fib_notifier(struct notifier_block *nb, struct net *net, 242c0243892SIdo Schimmel enum fib_event_type event_type, 243c0243892SIdo Schimmel struct fib_notifier_info *info); 244b90eb754SJiri Pirko int call_fib_notifiers(struct net *net, enum fib_event_type event_type, 245b90eb754SJiri Pirko struct fib_notifier_info *info); 246b90eb754SJiri Pirko 247d05f7a7dSIdo Schimmel void fib_notify(struct net *net, struct notifier_block *nb); 248c0243892SIdo Schimmel #ifdef CONFIG_IP_MULTIPLE_TABLES 249d05f7a7dSIdo Schimmel void fib_rules_notify(struct net *net, struct notifier_block *nb); 250c0243892SIdo Schimmel #else 251d05f7a7dSIdo Schimmel static inline void fib_rules_notify(struct net *net, struct notifier_block *nb) 252c0243892SIdo Schimmel { 253c0243892SIdo Schimmel } 254c0243892SIdo Schimmel #endif 255c0243892SIdo Schimmel 2561da177e4SLinus Torvalds struct fib_table { 2571af5a8c4SPatrick McHardy struct hlist_node tb_hlist; 2582dfe55b4SPatrick McHardy u32 tb_id; 25921d8c49eSDavid S. Miller int tb_num_default; 260a7e53531SAlexander Duyck struct rcu_head rcu; 2610ddcf43dSAlexander Duyck unsigned long *tb_data; 2620ddcf43dSAlexander Duyck unsigned long __data[0]; 2631da177e4SLinus Torvalds }; 2641da177e4SLinus Torvalds 2655c3a0fd7SJoe Perches int fib_table_lookup(struct fib_table *tb, const struct flowi4 *flp, 266ebc0ffaeSEric Dumazet struct fib_result *res, int fib_flags); 2676d8422a1SDavid Ahern int fib_table_insert(struct net *, struct fib_table *, struct fib_config *, 2686d8422a1SDavid Ahern struct netlink_ext_ack *extack); 269b90eb754SJiri Pirko int fib_table_delete(struct net *, struct fib_table *, struct fib_config *); 2705c3a0fd7SJoe Perches int fib_table_dump(struct fib_table *table, struct sk_buff *skb, 27116c6cf8bSStephen Hemminger struct netlink_callback *cb); 272b90eb754SJiri Pirko int fib_table_flush(struct net *net, struct fib_table *table); 2730ddcf43dSAlexander Duyck struct fib_table *fib_trie_unmerge(struct fib_table *main_tb); 2743b709334SAlexander Duyck void fib_table_flush_external(struct fib_table *table); 2755c3a0fd7SJoe Perches void fib_free_table(struct fib_table *tb); 2764aa2c466SPavel Emelyanov 2771da177e4SLinus Torvalds #ifndef CONFIG_IP_MULTIPLE_TABLES 2781da177e4SLinus Torvalds 279a5a519b2SAlexander Duyck #define TABLE_LOCAL_INDEX (RT_TABLE_LOCAL & (FIB_TABLE_HASHSZ - 1)) 280a5a519b2SAlexander Duyck #define TABLE_MAIN_INDEX (RT_TABLE_MAIN & (FIB_TABLE_HASHSZ - 1)) 2811da177e4SLinus Torvalds 2828ad4942cSDenis V. Lunev static inline struct fib_table *fib_get_table(struct net *net, u32 id) 2831da177e4SLinus Torvalds { 284a7e53531SAlexander Duyck struct hlist_node *tb_hlist; 28593456b6dSDenis V. Lunev struct hlist_head *ptr; 28693456b6dSDenis V. Lunev 28793456b6dSDenis V. Lunev ptr = id == RT_TABLE_LOCAL ? 288e4aef8aeSDenis V. Lunev &net->ipv4.fib_table_hash[TABLE_LOCAL_INDEX] : 289e4aef8aeSDenis V. Lunev &net->ipv4.fib_table_hash[TABLE_MAIN_INDEX]; 290a7e53531SAlexander Duyck 291a7e53531SAlexander Duyck tb_hlist = rcu_dereference_rtnl(hlist_first_rcu(ptr)); 292a7e53531SAlexander Duyck 293a7e53531SAlexander Duyck return hlist_entry(tb_hlist, struct fib_table, tb_hlist); 2941da177e4SLinus Torvalds } 2951da177e4SLinus Torvalds 2968ad4942cSDenis V. Lunev static inline struct fib_table *fib_new_table(struct net *net, u32 id) 2971da177e4SLinus Torvalds { 2988ad4942cSDenis V. Lunev return fib_get_table(net, id); 2991da177e4SLinus Torvalds } 3001da177e4SLinus Torvalds 30122bd5b9bSDavid S. Miller static inline int fib_lookup(struct net *net, const struct flowi4 *flp, 3020eeb075fSAndy Gospodarek struct fib_result *res, unsigned int flags) 3031da177e4SLinus Torvalds { 304a7e53531SAlexander Duyck struct fib_table *tb; 3050ddcf43dSAlexander Duyck int err = -ENETUNREACH; 30693456b6dSDenis V. Lunev 307345e9b54SAlexander Duyck rcu_read_lock(); 30893456b6dSDenis V. Lunev 309a7e53531SAlexander Duyck tb = fib_get_table(net, RT_TABLE_MAIN); 3100315e382SNikola Forró if (tb) 3110315e382SNikola Forró err = fib_table_lookup(tb, flp, res, flags | FIB_LOOKUP_NOREF); 3120315e382SNikola Forró 3130315e382SNikola Forró if (err == -EAGAIN) 3140315e382SNikola Forró err = -ENETUNREACH; 315345e9b54SAlexander Duyck 316345e9b54SAlexander Duyck rcu_read_unlock(); 317345e9b54SAlexander Duyck 318345e9b54SAlexander Duyck return err; 3191da177e4SLinus Torvalds } 3201da177e4SLinus Torvalds 3213c71006dSIdo Schimmel static inline bool fib4_rule_default(const struct fib_rule *rule) 3223c71006dSIdo Schimmel { 3233c71006dSIdo Schimmel return true; 3243c71006dSIdo Schimmel } 3253c71006dSIdo Schimmel 3261da177e4SLinus Torvalds #else /* CONFIG_IP_MULTIPLE_TABLES */ 3275c3a0fd7SJoe Perches int __net_init fib4_rules_init(struct net *net); 3285c3a0fd7SJoe Perches void __net_exit fib4_rules_exit(struct net *net); 329c3e9a353SPavel Emelyanov 3305c3a0fd7SJoe Perches struct fib_table *fib_new_table(struct net *net, u32 id); 3315c3a0fd7SJoe Perches struct fib_table *fib_get_table(struct net *net, u32 id); 3321da177e4SLinus Torvalds 3330eeb075fSAndy Gospodarek int __fib_lookup(struct net *net, struct flowi4 *flp, 3340eeb075fSAndy Gospodarek struct fib_result *res, unsigned int flags); 335f4530fa5SDavid S. Miller 336f4530fa5SDavid S. Miller static inline int fib_lookup(struct net *net, struct flowi4 *flp, 3370eeb075fSAndy Gospodarek struct fib_result *res, unsigned int flags) 338f4530fa5SDavid S. Miller { 339a7e53531SAlexander Duyck struct fib_table *tb; 3400315e382SNikola Forró int err = -ENETUNREACH; 341a7e53531SAlexander Duyck 3420eeb075fSAndy Gospodarek flags |= FIB_LOOKUP_NOREF; 343a7e53531SAlexander Duyck if (net->ipv4.fib_has_custom_rules) 3440eeb075fSAndy Gospodarek return __fib_lookup(net, flp, res, flags); 345345e9b54SAlexander Duyck 346345e9b54SAlexander Duyck rcu_read_lock(); 347345e9b54SAlexander Duyck 34885b91b03SDavid S. Miller res->tclassid = 0; 349a7e53531SAlexander Duyck 350a7e53531SAlexander Duyck tb = rcu_dereference_rtnl(net->ipv4.fib_main); 3510315e382SNikola Forró if (tb) 3520315e382SNikola Forró err = fib_table_lookup(tb, flp, res, flags); 3530315e382SNikola Forró 3540315e382SNikola Forró if (!err) 3550315e382SNikola Forró goto out; 356a7e53531SAlexander Duyck 357a7e53531SAlexander Duyck tb = rcu_dereference_rtnl(net->ipv4.fib_default); 3580315e382SNikola Forró if (tb) 3590315e382SNikola Forró err = fib_table_lookup(tb, flp, res, flags); 3600315e382SNikola Forró 3610315e382SNikola Forró out: 3620315e382SNikola Forró if (err == -EAGAIN) 3630315e382SNikola Forró err = -ENETUNREACH; 364345e9b54SAlexander Duyck 365345e9b54SAlexander Duyck rcu_read_unlock(); 366345e9b54SAlexander Duyck 367345e9b54SAlexander Duyck return err; 368f4530fa5SDavid S. Miller } 369f4530fa5SDavid S. Miller 3703c71006dSIdo Schimmel bool fib4_rule_default(const struct fib_rule *rule); 3713c71006dSIdo Schimmel 3721da177e4SLinus Torvalds #endif /* CONFIG_IP_MULTIPLE_TABLES */ 3731da177e4SLinus Torvalds 3741da177e4SLinus Torvalds /* Exported by fib_frontend.c */ 375ef7c79edSPatrick McHardy extern const struct nla_policy rtm_ipv4_policy[]; 3765c3a0fd7SJoe Perches void ip_fib_init(void); 3775c3a0fd7SJoe Perches __be32 fib_compute_spec_dst(struct sk_buff *skb); 3785c3a0fd7SJoe Perches int fib_validate_source(struct sk_buff *skb, __be32 src, __be32 dst, 3795c04c819SMichael Smith u8 tos, int oif, struct net_device *dev, 3809e56e380SDavid S. Miller struct in_device *idev, u32 *itag); 3817a9bc9b8SDavid S. Miller #ifdef CONFIG_IP_ROUTE_CLASSID 382f4530fa5SDavid S. Miller static inline int fib_num_tclassid_users(struct net *net) 383f4530fa5SDavid S. Miller { 384f4530fa5SDavid S. Miller return net->ipv4.fib_num_tclassid_users; 385f4530fa5SDavid S. Miller } 3867a9bc9b8SDavid S. Miller #else 387f4530fa5SDavid S. Miller static inline int fib_num_tclassid_users(struct net *net) 388f4530fa5SDavid S. Miller { 389f4530fa5SDavid S. Miller return 0; 390f4530fa5SDavid S. Miller } 3917a9bc9b8SDavid S. Miller #endif 3920ddcf43dSAlexander Duyck int fib_unmerge(struct net *net); 39314c85021SArnaldo Carvalho de Melo 3941da177e4SLinus Torvalds /* Exported by fib_semantics.c */ 3955c3a0fd7SJoe Perches int ip_fib_check_default(__be32 gw, struct net_device *dev); 3964f823defSJulian Anastasov int fib_sync_down_dev(struct net_device *dev, unsigned long event, bool force); 3975a56a0b3SMark Tomlinson int fib_sync_down_addr(struct net_device *dev, __be32 local); 3988a3d0316SAndy Gospodarek int fib_sync_up(struct net_device *dev, unsigned int nh_flags); 3990e884c78SPeter Nørlund 400bf4e0a3dSNikolay Aleksandrov #ifdef CONFIG_IP_ROUTE_MULTIPATH 401bf4e0a3dSNikolay Aleksandrov int fib_multipath_hash(const struct fib_info *fi, const struct flowi4 *fl4, 402bf4e0a3dSNikolay Aleksandrov const struct sk_buff *skb); 403bf4e0a3dSNikolay Aleksandrov #endif 4040e884c78SPeter Nørlund void fib_select_multipath(struct fib_result *res, int hash); 4053ce58d84SDavid Ahern void fib_select_path(struct net *net, struct fib_result *res, 406bf4e0a3dSNikolay Aleksandrov struct flowi4 *fl4, const struct sk_buff *skb); 4071da177e4SLinus Torvalds 4085348ba85SDavid S. Miller /* Exported by fib_trie.c */ 4095c3a0fd7SJoe Perches void fib_trie_init(void); 4100ddcf43dSAlexander Duyck struct fib_table *fib_trie_table(u32 id, struct fib_table *alias); 4111da177e4SLinus Torvalds 412b6bf3ca0SDavid S. Miller static inline void fib_combine_itag(u32 *itag, const struct fib_result *res) 4131da177e4SLinus Torvalds { 414c7066f70SPatrick McHardy #ifdef CONFIG_IP_ROUTE_CLASSID 4151da177e4SLinus Torvalds #ifdef CONFIG_IP_MULTIPLE_TABLES 4161da177e4SLinus Torvalds u32 rtag; 4171da177e4SLinus Torvalds #endif 4181da177e4SLinus Torvalds *itag = FIB_RES_NH(*res).nh_tclassid<<16; 4191da177e4SLinus Torvalds #ifdef CONFIG_IP_MULTIPLE_TABLES 42085b91b03SDavid S. Miller rtag = res->tclassid; 4211da177e4SLinus Torvalds if (*itag == 0) 4221da177e4SLinus Torvalds *itag = (rtag<<16); 4231da177e4SLinus Torvalds *itag |= (rtag>>16); 4241da177e4SLinus Torvalds #endif 4251da177e4SLinus Torvalds #endif 4261da177e4SLinus Torvalds } 4271da177e4SLinus Torvalds 4285c3a0fd7SJoe Perches void free_fib_info(struct fib_info *fi); 4291da177e4SLinus Torvalds 4301c677b3dSIdo Schimmel static inline void fib_info_hold(struct fib_info *fi) 4311c677b3dSIdo Schimmel { 4321c677b3dSIdo Schimmel atomic_inc(&fi->fib_clntref); 4331c677b3dSIdo Schimmel } 4341c677b3dSIdo Schimmel 4351da177e4SLinus Torvalds static inline void fib_info_put(struct fib_info *fi) 4361da177e4SLinus Torvalds { 4371da177e4SLinus Torvalds if (atomic_dec_and_test(&fi->fib_clntref)) 4381da177e4SLinus Torvalds free_fib_info(fi); 4391da177e4SLinus Torvalds } 4401da177e4SLinus Torvalds 44120380731SArnaldo Carvalho de Melo #ifdef CONFIG_PROC_FS 4425c3a0fd7SJoe Perches int __net_init fib_proc_init(struct net *net); 4435c3a0fd7SJoe Perches void __net_exit fib_proc_exit(struct net *net); 444cc8274f5SLi Zefan #else 445cc8274f5SLi Zefan static inline int fib_proc_init(struct net *net) 446cc8274f5SLi Zefan { 447cc8274f5SLi Zefan return 0; 448cc8274f5SLi Zefan } 449cc8274f5SLi Zefan static inline void fib_proc_exit(struct net *net) 450cc8274f5SLi Zefan { 451cc8274f5SLi Zefan } 45220380731SArnaldo Carvalho de Melo #endif 45320380731SArnaldo Carvalho de Melo 4541da177e4SLinus Torvalds #endif /* _NET_FIB_H */ 455