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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 | ||
16 | #ifdef __KERNEL__ | |
17 | ||
18 | #include <linux/ipv6_route.h> | |
1da177e4 LT |
19 | #include <linux/rtnetlink.h> |
20 | #include <linux/spinlock.h> | |
86872cb5 TG |
21 | #include <net/dst.h> |
22 | #include <net/flow.h> | |
23 | #include <net/netlink.h> | |
1da177e4 | 24 | |
a33bc5c1 NH |
25 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
26 | #define FIB6_TABLE_HASHSZ 256 | |
27 | #else | |
28 | #define FIB6_TABLE_HASHSZ 1 | |
29 | #endif | |
30 | ||
1da177e4 LT |
31 | struct rt6_info; |
32 | ||
fd2c3ef7 | 33 | struct fib6_config { |
86872cb5 TG |
34 | u32 fc_table; |
35 | u32 fc_metric; | |
36 | int fc_dst_len; | |
37 | int fc_src_len; | |
38 | int fc_ifindex; | |
39 | u32 fc_flags; | |
40 | u32 fc_protocol; | |
41 | ||
42 | struct in6_addr fc_dst; | |
43 | struct in6_addr fc_src; | |
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 | |
d8d1f30b CG |
89 | #define rt6i_dev dst.dev |
90 | #define rt6i_nexthop dst.neighbour | |
91 | #define rt6i_expires dst.expires | |
1da177e4 | 92 | |
bd2c77a0 YH |
93 | /* |
94 | * Tail elements of dst_entry (__refcnt etc.) | |
95 | * and these elements (rarely used in hot path) are in | |
96 | * the same cache line. | |
97 | */ | |
98 | struct fib6_table *rt6i_table; | |
1da177e4 LT |
99 | struct fib6_node *rt6i_node; |
100 | ||
101 | struct in6_addr rt6i_gateway; | |
1da177e4 | 102 | |
bd2c77a0 | 103 | atomic_t rt6i_ref; |
a47ed4cd | 104 | |
bd2c77a0 YH |
105 | /* These are in a separate cache line. */ |
106 | struct rt6key rt6i_dst ____cacheline_aligned_in_smp; | |
107 | u32 rt6i_flags; | |
108 | struct rt6key rt6i_src; | |
109 | u32 rt6i_metric; | |
b4ce9277 | 110 | |
bd2c77a0 | 111 | struct inet6_dev *rt6i_idev; |
b4ce9277 | 112 | |
a47ed4cd NT |
113 | #ifdef CONFIG_XFRM |
114 | u32 rt6i_flow_cache_genid; | |
115 | #endif | |
bd2c77a0 YH |
116 | /* more non-fragment space at head required */ |
117 | unsigned short rt6i_nfheader_len; | |
b4ce9277 | 118 | |
bd2c77a0 | 119 | u8 rt6i_protocol; |
1da177e4 LT |
120 | }; |
121 | ||
7a3025b1 YH |
122 | static inline struct inet6_dev *ip6_dst_idev(struct dst_entry *dst) |
123 | { | |
124 | return ((struct rt6_info *)dst)->rt6i_idev; | |
125 | } | |
126 | ||
fd2c3ef7 | 127 | struct fib6_walker_t { |
bbef49da | 128 | struct list_head lh; |
1da177e4 LT |
129 | struct fib6_node *root, *node; |
130 | struct rt6_info *leaf; | |
131 | unsigned char state; | |
132 | unsigned char prune; | |
2bec5a36 PM |
133 | unsigned int skip; |
134 | unsigned int count; | |
1da177e4 LT |
135 | int (*func)(struct fib6_walker_t *); |
136 | void *args; | |
137 | }; | |
138 | ||
1da177e4 LT |
139 | struct rt6_statistics { |
140 | __u32 fib_nodes; | |
141 | __u32 fib_route_nodes; | |
142 | __u32 fib_rt_alloc; /* permanent routes */ | |
143 | __u32 fib_rt_entries; /* rt entries in table */ | |
144 | __u32 fib_rt_cache; /* cache routes */ | |
145 | __u32 fib_discarded_routes; | |
146 | }; | |
147 | ||
148 | #define RTN_TL_ROOT 0x0001 | |
149 | #define RTN_ROOT 0x0002 /* tree root node */ | |
150 | #define RTN_RTINFO 0x0004 /* node with valid routing info */ | |
151 | ||
152 | /* | |
153 | * priority levels (or metrics) | |
154 | * | |
155 | */ | |
156 | ||
1da177e4 | 157 | |
c71099ac TG |
158 | struct fib6_table { |
159 | struct hlist_node tb6_hlist; | |
160 | u32 tb6_id; | |
161 | rwlock_t tb6_lock; | |
162 | struct fib6_node tb6_root; | |
163 | }; | |
164 | ||
165 | #define RT6_TABLE_UNSPEC RT_TABLE_UNSPEC | |
166 | #define RT6_TABLE_MAIN RT_TABLE_MAIN | |
c71099ac TG |
167 | #define RT6_TABLE_DFLT RT6_TABLE_MAIN |
168 | #define RT6_TABLE_INFO RT6_TABLE_MAIN | |
169 | #define RT6_TABLE_PREFIX RT6_TABLE_MAIN | |
170 | ||
171 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES | |
172 | #define FIB6_TABLE_MIN 1 | |
173 | #define FIB6_TABLE_MAX RT_TABLE_MAX | |
101367c2 | 174 | #define RT6_TABLE_LOCAL RT_TABLE_LOCAL |
c71099ac TG |
175 | #else |
176 | #define FIB6_TABLE_MIN RT_TABLE_MAIN | |
177 | #define FIB6_TABLE_MAX FIB6_TABLE_MIN | |
101367c2 | 178 | #define RT6_TABLE_LOCAL RT6_TABLE_MAIN |
c71099ac TG |
179 | #endif |
180 | ||
8ed67789 DL |
181 | typedef struct rt6_info *(*pol_lookup_t)(struct net *, |
182 | struct fib6_table *, | |
c71099ac | 183 | struct flowi *, int); |
1da177e4 LT |
184 | |
185 | /* | |
186 | * exported functions | |
187 | */ | |
188 | ||
58f09b78 DL |
189 | extern struct fib6_table *fib6_get_table(struct net *net, u32 id); |
190 | extern struct fib6_table *fib6_new_table(struct net *net, u32 id); | |
191 | extern struct dst_entry *fib6_rule_lookup(struct net *net, | |
192 | struct flowi *fl, int flags, | |
193 | pol_lookup_t lookup); | |
c71099ac | 194 | |
1da177e4 LT |
195 | extern struct fib6_node *fib6_lookup(struct fib6_node *root, |
196 | struct in6_addr *daddr, | |
197 | struct in6_addr *saddr); | |
198 | ||
199 | struct fib6_node *fib6_locate(struct fib6_node *root, | |
200 | struct in6_addr *daddr, int dst_len, | |
201 | struct in6_addr *saddr, int src_len); | |
202 | ||
f3db4851 DL |
203 | extern void fib6_clean_all(struct net *net, |
204 | int (*func)(struct rt6_info *, void *arg), | |
c71099ac TG |
205 | int prune, void *arg); |
206 | ||
1da177e4 LT |
207 | extern int fib6_add(struct fib6_node *root, |
208 | struct rt6_info *rt, | |
86872cb5 | 209 | struct nl_info *info); |
1da177e4 LT |
210 | |
211 | extern int fib6_del(struct rt6_info *rt, | |
86872cb5 | 212 | struct nl_info *info); |
1da177e4 LT |
213 | |
214 | extern void inet6_rt_notify(int event, struct rt6_info *rt, | |
86872cb5 | 215 | struct nl_info *info); |
1da177e4 | 216 | |
5b7c931d DL |
217 | extern void fib6_run_gc(unsigned long expires, |
218 | struct net *net); | |
1da177e4 LT |
219 | |
220 | extern void fib6_gc_cleanup(void); | |
221 | ||
d63bddbe | 222 | extern int fib6_init(void); |
101367c2 | 223 | |
7e5449c2 | 224 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
9eb87f3f | 225 | extern int fib6_rules_init(void); |
101367c2 | 226 | extern void fib6_rules_cleanup(void); |
7e5449c2 DL |
227 | #else |
228 | static inline int fib6_rules_init(void) | |
229 | { | |
230 | return 0; | |
231 | } | |
232 | static inline void fib6_rules_cleanup(void) | |
233 | { | |
234 | return ; | |
235 | } | |
236 | #endif | |
1da177e4 LT |
237 | #endif |
238 | #endif |