Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Linux INET6 implementation | |
3 | * | |
4 | * Authors: | |
5 | * Pedro Roque <roque@di.fc.ul.pt> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU General Public License | |
9 | * as published by the Free Software Foundation; either version | |
10 | * 2 of the License, or (at your option) any later version. | |
11 | */ | |
12 | ||
13 | #ifndef _IP6_FIB_H | |
14 | #define _IP6_FIB_H | |
15 | ||
1da177e4 | 16 | #include <linux/ipv6_route.h> |
1da177e4 LT |
17 | #include <linux/rtnetlink.h> |
18 | #include <linux/spinlock.h> | |
86872cb5 TG |
19 | #include <net/dst.h> |
20 | #include <net/flow.h> | |
21 | #include <net/netlink.h> | |
b3419363 | 22 | #include <net/inetpeer.h> |
1da177e4 | 23 | |
a33bc5c1 NH |
24 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
25 | #define FIB6_TABLE_HASHSZ 256 | |
26 | #else | |
27 | #define FIB6_TABLE_HASHSZ 1 | |
28 | #endif | |
29 | ||
1da177e4 LT |
30 | struct rt6_info; |
31 | ||
fd2c3ef7 | 32 | struct fib6_config { |
86872cb5 TG |
33 | u32 fc_table; |
34 | u32 fc_metric; | |
35 | int fc_dst_len; | |
36 | int fc_src_len; | |
37 | int fc_ifindex; | |
38 | u32 fc_flags; | |
39 | u32 fc_protocol; | |
40 | ||
41 | struct in6_addr fc_dst; | |
42 | struct in6_addr fc_src; | |
c3968a85 | 43 | struct in6_addr fc_prefsrc; |
86872cb5 TG |
44 | struct in6_addr fc_gateway; |
45 | ||
46 | unsigned long fc_expires; | |
47 | struct nlattr *fc_mx; | |
48 | int fc_mx_len; | |
49 | ||
50 | struct nl_info fc_nlinfo; | |
51 | }; | |
52 | ||
fd2c3ef7 | 53 | struct fib6_node { |
1da177e4 LT |
54 | struct fib6_node *parent; |
55 | struct fib6_node *left; | |
56 | struct fib6_node *right; | |
8bce65b9 | 57 | #ifdef CONFIG_IPV6_SUBTREES |
1da177e4 | 58 | struct fib6_node *subtree; |
8bce65b9 | 59 | #endif |
1da177e4 LT |
60 | struct rt6_info *leaf; |
61 | ||
62 | __u16 fn_bit; /* bit key */ | |
63 | __u16 fn_flags; | |
64 | __u32 fn_sernum; | |
f11e6659 | 65 | struct rt6_info *rr_ptr; |
1da177e4 LT |
66 | }; |
67 | ||
7fc33165 YH |
68 | #ifndef CONFIG_IPV6_SUBTREES |
69 | #define FIB6_SUBTREE(fn) NULL | |
70 | #else | |
71 | #define FIB6_SUBTREE(fn) ((fn)->subtree) | |
72 | #endif | |
1da177e4 LT |
73 | |
74 | /* | |
75 | * routing information | |
76 | * | |
77 | */ | |
78 | ||
fd2c3ef7 | 79 | struct rt6key { |
1da177e4 LT |
80 | struct in6_addr addr; |
81 | int plen; | |
82 | }; | |
83 | ||
c71099ac TG |
84 | struct fib6_table; |
85 | ||
fd2c3ef7 | 86 | struct rt6_info { |
d8d1f30b | 87 | struct dst_entry dst; |
1da177e4 | 88 | |
bd2c77a0 YH |
89 | /* |
90 | * Tail elements of dst_entry (__refcnt etc.) | |
91 | * and these elements (rarely used in hot path) are in | |
92 | * the same cache line. | |
93 | */ | |
94 | struct fib6_table *rt6i_table; | |
1da177e4 LT |
95 | struct fib6_node *rt6i_node; |
96 | ||
97 | struct in6_addr rt6i_gateway; | |
1da177e4 | 98 | |
bd2c77a0 | 99 | atomic_t rt6i_ref; |
a47ed4cd | 100 | |
bd2c77a0 YH |
101 | /* These are in a separate cache line. */ |
102 | struct rt6key rt6i_dst ____cacheline_aligned_in_smp; | |
103 | u32 rt6i_flags; | |
104 | struct rt6key rt6i_src; | |
c3968a85 | 105 | struct rt6key rt6i_prefsrc; |
bd2c77a0 | 106 | u32 rt6i_metric; |
6431cbc2 | 107 | u32 rt6i_peer_genid; |
b4ce9277 | 108 | |
bd2c77a0 | 109 | struct inet6_dev *rt6i_idev; |
b3419363 | 110 | struct inet_peer *rt6i_peer; |
b4ce9277 | 111 | |
a47ed4cd NT |
112 | #ifdef CONFIG_XFRM |
113 | u32 rt6i_flow_cache_genid; | |
114 | #endif | |
bd2c77a0 YH |
115 | /* more non-fragment space at head required */ |
116 | unsigned short rt6i_nfheader_len; | |
b4ce9277 | 117 | |
bd2c77a0 | 118 | u8 rt6i_protocol; |
1da177e4 LT |
119 | }; |
120 | ||
7a3025b1 YH |
121 | static inline struct inet6_dev *ip6_dst_idev(struct dst_entry *dst) |
122 | { | |
123 | return ((struct rt6_info *)dst)->rt6i_idev; | |
124 | } | |
125 | ||
1716a961 G |
126 | static inline void rt6_clean_expires(struct rt6_info *rt) |
127 | { | |
128 | if (!(rt->rt6i_flags & RTF_EXPIRES) && rt->dst.from) | |
129 | dst_release(rt->dst.from); | |
130 | ||
131 | rt->rt6i_flags &= ~RTF_EXPIRES; | |
132 | rt->dst.expires = 0; | |
133 | } | |
134 | ||
135 | static inline void rt6_set_expires(struct rt6_info *rt, unsigned long expires) | |
136 | { | |
137 | if (!(rt->rt6i_flags & RTF_EXPIRES) && rt->dst.from) | |
138 | dst_release(rt->dst.from); | |
139 | ||
140 | rt->rt6i_flags |= RTF_EXPIRES; | |
141 | rt->dst.expires = expires; | |
142 | } | |
143 | ||
144 | static inline void rt6_update_expires(struct rt6_info *rt, int timeout) | |
145 | { | |
146 | if (!(rt->rt6i_flags & RTF_EXPIRES) && rt->dst.from) | |
147 | dst_release(rt->dst.from); | |
148 | ||
149 | dst_set_expires(&rt->dst, timeout); | |
150 | rt->rt6i_flags |= RTF_EXPIRES; | |
151 | } | |
152 | ||
153 | static inline void rt6_set_from(struct rt6_info *rt, struct rt6_info *from) | |
154 | { | |
155 | struct dst_entry *new = (struct dst_entry *) from; | |
156 | ||
157 | if (!(rt->rt6i_flags & RTF_EXPIRES) && rt->dst.from) { | |
158 | if (new == rt->dst.from) | |
159 | return; | |
160 | dst_release(rt->dst.from); | |
161 | } | |
162 | ||
163 | rt->rt6i_flags &= ~RTF_EXPIRES; | |
164 | rt->dst.from = new; | |
165 | dst_hold(new); | |
166 | } | |
167 | ||
fd2c3ef7 | 168 | struct fib6_walker_t { |
bbef49da | 169 | struct list_head lh; |
1da177e4 LT |
170 | struct fib6_node *root, *node; |
171 | struct rt6_info *leaf; | |
172 | unsigned char state; | |
173 | unsigned char prune; | |
2bec5a36 PM |
174 | unsigned int skip; |
175 | unsigned int count; | |
1da177e4 LT |
176 | int (*func)(struct fib6_walker_t *); |
177 | void *args; | |
178 | }; | |
179 | ||
1da177e4 LT |
180 | struct rt6_statistics { |
181 | __u32 fib_nodes; | |
182 | __u32 fib_route_nodes; | |
183 | __u32 fib_rt_alloc; /* permanent routes */ | |
184 | __u32 fib_rt_entries; /* rt entries in table */ | |
185 | __u32 fib_rt_cache; /* cache routes */ | |
186 | __u32 fib_discarded_routes; | |
187 | }; | |
188 | ||
189 | #define RTN_TL_ROOT 0x0001 | |
190 | #define RTN_ROOT 0x0002 /* tree root node */ | |
191 | #define RTN_RTINFO 0x0004 /* node with valid routing info */ | |
192 | ||
193 | /* | |
194 | * priority levels (or metrics) | |
195 | * | |
196 | */ | |
197 | ||
1da177e4 | 198 | |
c71099ac TG |
199 | struct fib6_table { |
200 | struct hlist_node tb6_hlist; | |
201 | u32 tb6_id; | |
202 | rwlock_t tb6_lock; | |
203 | struct fib6_node tb6_root; | |
204 | }; | |
205 | ||
206 | #define RT6_TABLE_UNSPEC RT_TABLE_UNSPEC | |
207 | #define RT6_TABLE_MAIN RT_TABLE_MAIN | |
c71099ac TG |
208 | #define RT6_TABLE_DFLT RT6_TABLE_MAIN |
209 | #define RT6_TABLE_INFO RT6_TABLE_MAIN | |
210 | #define RT6_TABLE_PREFIX RT6_TABLE_MAIN | |
211 | ||
212 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES | |
213 | #define FIB6_TABLE_MIN 1 | |
214 | #define FIB6_TABLE_MAX RT_TABLE_MAX | |
101367c2 | 215 | #define RT6_TABLE_LOCAL RT_TABLE_LOCAL |
c71099ac TG |
216 | #else |
217 | #define FIB6_TABLE_MIN RT_TABLE_MAIN | |
218 | #define FIB6_TABLE_MAX FIB6_TABLE_MIN | |
101367c2 | 219 | #define RT6_TABLE_LOCAL RT6_TABLE_MAIN |
c71099ac TG |
220 | #endif |
221 | ||
8ed67789 DL |
222 | typedef struct rt6_info *(*pol_lookup_t)(struct net *, |
223 | struct fib6_table *, | |
4c9483b2 | 224 | struct flowi6 *, int); |
1da177e4 LT |
225 | |
226 | /* | |
227 | * exported functions | |
228 | */ | |
229 | ||
58f09b78 DL |
230 | extern struct fib6_table *fib6_get_table(struct net *net, u32 id); |
231 | extern struct fib6_table *fib6_new_table(struct net *net, u32 id); | |
232 | extern struct dst_entry *fib6_rule_lookup(struct net *net, | |
4c9483b2 | 233 | struct flowi6 *fl6, int flags, |
58f09b78 | 234 | pol_lookup_t lookup); |
c71099ac | 235 | |
1da177e4 | 236 | extern struct fib6_node *fib6_lookup(struct fib6_node *root, |
b71d1d42 ED |
237 | const struct in6_addr *daddr, |
238 | const struct in6_addr *saddr); | |
1da177e4 LT |
239 | |
240 | struct fib6_node *fib6_locate(struct fib6_node *root, | |
b71d1d42 ED |
241 | const struct in6_addr *daddr, int dst_len, |
242 | const struct in6_addr *saddr, int src_len); | |
1da177e4 | 243 | |
32b293a5 JH |
244 | extern void fib6_clean_all_ro(struct net *net, |
245 | int (*func)(struct rt6_info *, void *arg), | |
246 | int prune, void *arg); | |
247 | ||
f3db4851 DL |
248 | extern void fib6_clean_all(struct net *net, |
249 | int (*func)(struct rt6_info *, void *arg), | |
c71099ac TG |
250 | int prune, void *arg); |
251 | ||
1da177e4 LT |
252 | extern int fib6_add(struct fib6_node *root, |
253 | struct rt6_info *rt, | |
86872cb5 | 254 | struct nl_info *info); |
1da177e4 LT |
255 | |
256 | extern int fib6_del(struct rt6_info *rt, | |
86872cb5 | 257 | struct nl_info *info); |
1da177e4 LT |
258 | |
259 | extern void inet6_rt_notify(int event, struct rt6_info *rt, | |
86872cb5 | 260 | struct nl_info *info); |
1da177e4 | 261 | |
5b7c931d DL |
262 | extern void fib6_run_gc(unsigned long expires, |
263 | struct net *net); | |
1da177e4 LT |
264 | |
265 | extern void fib6_gc_cleanup(void); | |
266 | ||
d63bddbe | 267 | extern int fib6_init(void); |
101367c2 | 268 | |
7e5449c2 | 269 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
9eb87f3f | 270 | extern int fib6_rules_init(void); |
101367c2 | 271 | extern void fib6_rules_cleanup(void); |
7e5449c2 DL |
272 | #else |
273 | static inline int fib6_rules_init(void) | |
274 | { | |
275 | return 0; | |
276 | } | |
277 | static inline void fib6_rules_cleanup(void) | |
278 | { | |
279 | return ; | |
280 | } | |
281 | #endif | |
1da177e4 | 282 | #endif |