mfd: wm8350-i2c: Make sure the i2c regmap functions are compiled
[linux/fpc-iii.git] / include / net / ip_fib.h
blob4dae9d5268ca5bf4449afa9a1e8d0d5d2b162c83
1 /*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
6 * Definitions for the Forwarding Information Base.
8 * Authors: A.N.Kuznetsov, <kuznet@ms2.inr.ac.ru>
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
16 #ifndef _NET_IP_FIB_H
17 #define _NET_IP_FIB_H
19 #include <net/flow.h>
20 #include <linux/seq_file.h>
21 #include <linux/rcupdate.h>
22 #include <net/fib_rules.h>
23 #include <net/inetpeer.h>
24 #include <linux/percpu.h>
26 struct fib_config {
27 u8 fc_dst_len;
28 u8 fc_tos;
29 u8 fc_protocol;
30 u8 fc_scope;
31 u8 fc_type;
32 /* 3 bytes unused */
33 u32 fc_table;
34 __be32 fc_dst;
35 __be32 fc_gw;
36 int fc_oif;
37 u32 fc_flags;
38 u32 fc_priority;
39 __be32 fc_prefsrc;
40 struct nlattr *fc_mx;
41 struct rtnexthop *fc_mp;
42 int fc_mx_len;
43 int fc_mp_len;
44 u32 fc_flow;
45 u32 fc_nlflags;
46 struct nl_info fc_nlinfo;
49 struct fib_info;
50 struct rtable;
52 struct fib_nh_exception {
53 struct fib_nh_exception __rcu *fnhe_next;
54 int fnhe_genid;
55 __be32 fnhe_daddr;
56 u32 fnhe_pmtu;
57 __be32 fnhe_gw;
58 unsigned long fnhe_expires;
59 struct rtable __rcu *fnhe_rth_input;
60 struct rtable __rcu *fnhe_rth_output;
61 unsigned long fnhe_stamp;
62 struct rcu_head rcu;
65 struct fnhe_hash_bucket {
66 struct fib_nh_exception __rcu *chain;
69 #define FNHE_HASH_SIZE 2048
70 #define FNHE_RECLAIM_DEPTH 5
72 struct fib_nh {
73 struct net_device *nh_dev;
74 struct hlist_node nh_hash;
75 struct fib_info *nh_parent;
76 unsigned int nh_flags;
77 unsigned char nh_scope;
78 #ifdef CONFIG_IP_ROUTE_MULTIPATH
79 int nh_weight;
80 int nh_power;
81 #endif
82 #ifdef CONFIG_IP_ROUTE_CLASSID
83 __u32 nh_tclassid;
84 #endif
85 int nh_oif;
86 __be32 nh_gw;
87 __be32 nh_saddr;
88 int nh_saddr_genid;
89 struct rtable __rcu * __percpu *nh_pcpu_rth_output;
90 struct rtable __rcu *nh_rth_input;
91 struct fnhe_hash_bucket *nh_exceptions;
95 * This structure contains data shared by many of routes.
98 struct fib_info {
99 struct hlist_node fib_hash;
100 struct hlist_node fib_lhash;
101 struct net *fib_net;
102 int fib_treeref;
103 atomic_t fib_clntref;
104 unsigned int fib_flags;
105 unsigned char fib_dead;
106 unsigned char fib_protocol;
107 unsigned char fib_scope;
108 unsigned char fib_type;
109 __be32 fib_prefsrc;
110 u32 fib_priority;
111 u32 *fib_metrics;
112 #define fib_mtu fib_metrics[RTAX_MTU-1]
113 #define fib_window fib_metrics[RTAX_WINDOW-1]
114 #define fib_rtt fib_metrics[RTAX_RTT-1]
115 #define fib_advmss fib_metrics[RTAX_ADVMSS-1]
116 int fib_nhs;
117 #ifdef CONFIG_IP_ROUTE_MULTIPATH
118 int fib_power;
119 #endif
120 struct rcu_head rcu;
121 struct fib_nh fib_nh[0];
122 #define fib_dev fib_nh[0].nh_dev
126 #ifdef CONFIG_IP_MULTIPLE_TABLES
127 struct fib_rule;
128 #endif
130 struct fib_table;
131 struct fib_result {
132 unsigned char prefixlen;
133 unsigned char nh_sel;
134 unsigned char type;
135 unsigned char scope;
136 u32 tclassid;
137 struct fib_info *fi;
138 struct fib_table *table;
139 struct list_head *fa_head;
142 struct fib_result_nl {
143 __be32 fl_addr; /* To be looked up*/
144 u32 fl_mark;
145 unsigned char fl_tos;
146 unsigned char fl_scope;
147 unsigned char tb_id_in;
149 unsigned char tb_id; /* Results */
150 unsigned char prefixlen;
151 unsigned char nh_sel;
152 unsigned char type;
153 unsigned char scope;
154 int err;
157 #ifdef CONFIG_IP_ROUTE_MULTIPATH
158 #define FIB_RES_NH(res) ((res).fi->fib_nh[(res).nh_sel])
159 #else /* CONFIG_IP_ROUTE_MULTIPATH */
160 #define FIB_RES_NH(res) ((res).fi->fib_nh[0])
161 #endif /* CONFIG_IP_ROUTE_MULTIPATH */
163 #ifdef CONFIG_IP_MULTIPLE_TABLES
164 #define FIB_TABLE_HASHSZ 256
165 #else
166 #define FIB_TABLE_HASHSZ 2
167 #endif
169 extern __be32 fib_info_update_nh_saddr(struct net *net, struct fib_nh *nh);
171 #define FIB_RES_SADDR(net, res) \
172 ((FIB_RES_NH(res).nh_saddr_genid == \
173 atomic_read(&(net)->ipv4.dev_addr_genid)) ? \
174 FIB_RES_NH(res).nh_saddr : \
175 fib_info_update_nh_saddr((net), &FIB_RES_NH(res)))
176 #define FIB_RES_GW(res) (FIB_RES_NH(res).nh_gw)
177 #define FIB_RES_DEV(res) (FIB_RES_NH(res).nh_dev)
178 #define FIB_RES_OIF(res) (FIB_RES_NH(res).nh_oif)
180 #define FIB_RES_PREFSRC(net, res) ((res).fi->fib_prefsrc ? : \
181 FIB_RES_SADDR(net, res))
183 struct fib_table {
184 struct hlist_node tb_hlist;
185 u32 tb_id;
186 int tb_default;
187 int tb_num_default;
188 unsigned long tb_data[0];
191 extern int fib_table_lookup(struct fib_table *tb, const struct flowi4 *flp,
192 struct fib_result *res, int fib_flags);
193 extern int fib_table_insert(struct fib_table *, struct fib_config *);
194 extern int fib_table_delete(struct fib_table *, struct fib_config *);
195 extern int fib_table_dump(struct fib_table *table, struct sk_buff *skb,
196 struct netlink_callback *cb);
197 extern int fib_table_flush(struct fib_table *table);
198 extern void fib_free_table(struct fib_table *tb);
202 #ifndef CONFIG_IP_MULTIPLE_TABLES
204 #define TABLE_LOCAL_INDEX 0
205 #define TABLE_MAIN_INDEX 1
207 static inline struct fib_table *fib_get_table(struct net *net, u32 id)
209 struct hlist_head *ptr;
211 ptr = id == RT_TABLE_LOCAL ?
212 &net->ipv4.fib_table_hash[TABLE_LOCAL_INDEX] :
213 &net->ipv4.fib_table_hash[TABLE_MAIN_INDEX];
214 return hlist_entry(ptr->first, struct fib_table, tb_hlist);
217 static inline struct fib_table *fib_new_table(struct net *net, u32 id)
219 return fib_get_table(net, id);
222 static inline int fib_lookup(struct net *net, const struct flowi4 *flp,
223 struct fib_result *res)
225 struct fib_table *table;
227 table = fib_get_table(net, RT_TABLE_LOCAL);
228 if (!fib_table_lookup(table, flp, res, FIB_LOOKUP_NOREF))
229 return 0;
231 table = fib_get_table(net, RT_TABLE_MAIN);
232 if (!fib_table_lookup(table, flp, res, FIB_LOOKUP_NOREF))
233 return 0;
234 return -ENETUNREACH;
237 #else /* CONFIG_IP_MULTIPLE_TABLES */
238 extern int __net_init fib4_rules_init(struct net *net);
239 extern void __net_exit fib4_rules_exit(struct net *net);
241 extern struct fib_table *fib_new_table(struct net *net, u32 id);
242 extern struct fib_table *fib_get_table(struct net *net, u32 id);
244 extern int __fib_lookup(struct net *net, struct flowi4 *flp,
245 struct fib_result *res);
247 static inline int fib_lookup(struct net *net, struct flowi4 *flp,
248 struct fib_result *res)
250 if (!net->ipv4.fib_has_custom_rules) {
251 res->tclassid = 0;
252 if (net->ipv4.fib_local &&
253 !fib_table_lookup(net->ipv4.fib_local, flp, res,
254 FIB_LOOKUP_NOREF))
255 return 0;
256 if (net->ipv4.fib_main &&
257 !fib_table_lookup(net->ipv4.fib_main, flp, res,
258 FIB_LOOKUP_NOREF))
259 return 0;
260 if (net->ipv4.fib_default &&
261 !fib_table_lookup(net->ipv4.fib_default, flp, res,
262 FIB_LOOKUP_NOREF))
263 return 0;
264 return -ENETUNREACH;
266 return __fib_lookup(net, flp, res);
269 #endif /* CONFIG_IP_MULTIPLE_TABLES */
271 /* Exported by fib_frontend.c */
272 extern const struct nla_policy rtm_ipv4_policy[];
273 extern void ip_fib_init(void);
274 extern __be32 fib_compute_spec_dst(struct sk_buff *skb);
275 extern int fib_validate_source(struct sk_buff *skb, __be32 src, __be32 dst,
276 u8 tos, int oif, struct net_device *dev,
277 struct in_device *idev, u32 *itag);
278 extern void fib_select_default(struct fib_result *res);
279 #ifdef CONFIG_IP_ROUTE_CLASSID
280 static inline int fib_num_tclassid_users(struct net *net)
282 return net->ipv4.fib_num_tclassid_users;
284 #else
285 static inline int fib_num_tclassid_users(struct net *net)
287 return 0;
289 #endif
291 /* Exported by fib_semantics.c */
292 extern int ip_fib_check_default(__be32 gw, struct net_device *dev);
293 extern int fib_sync_down_dev(struct net_device *dev, int force);
294 extern int fib_sync_down_addr(struct net *net, __be32 local);
295 extern int fib_sync_up(struct net_device *dev);
296 extern void fib_select_multipath(struct fib_result *res);
298 /* Exported by fib_trie.c */
299 extern void fib_trie_init(void);
300 extern struct fib_table *fib_trie_table(u32 id);
302 static inline void fib_combine_itag(u32 *itag, const struct fib_result *res)
304 #ifdef CONFIG_IP_ROUTE_CLASSID
305 #ifdef CONFIG_IP_MULTIPLE_TABLES
306 u32 rtag;
307 #endif
308 *itag = FIB_RES_NH(*res).nh_tclassid<<16;
309 #ifdef CONFIG_IP_MULTIPLE_TABLES
310 rtag = res->tclassid;
311 if (*itag == 0)
312 *itag = (rtag<<16);
313 *itag |= (rtag>>16);
314 #endif
315 #endif
318 extern void free_fib_info(struct fib_info *fi);
320 static inline void fib_info_put(struct fib_info *fi)
322 if (atomic_dec_and_test(&fi->fib_clntref))
323 free_fib_info(fi);
326 #ifdef CONFIG_PROC_FS
327 extern int __net_init fib_proc_init(struct net *net);
328 extern void __net_exit fib_proc_exit(struct net *net);
329 #else
330 static inline int fib_proc_init(struct net *net)
332 return 0;
334 static inline void fib_proc_exit(struct net *net)
337 #endif
339 #endif /* _NET_FIB_H */