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 LT |
24 | |
25 | struct rt6_info; | |
26 | ||
86872cb5 TG |
27 | struct fib6_config |
28 | { | |
29 | u32 fc_table; | |
30 | u32 fc_metric; | |
31 | int fc_dst_len; | |
32 | int fc_src_len; | |
33 | int fc_ifindex; | |
34 | u32 fc_flags; | |
35 | u32 fc_protocol; | |
36 | ||
37 | struct in6_addr fc_dst; | |
38 | struct in6_addr fc_src; | |
39 | struct in6_addr fc_gateway; | |
40 | ||
41 | unsigned long fc_expires; | |
42 | struct nlattr *fc_mx; | |
43 | int fc_mx_len; | |
44 | ||
45 | struct nl_info fc_nlinfo; | |
46 | }; | |
47 | ||
1da177e4 LT |
48 | struct fib6_node |
49 | { | |
50 | struct fib6_node *parent; | |
51 | struct fib6_node *left; | |
52 | struct fib6_node *right; | |
8bce65b9 | 53 | #ifdef CONFIG_IPV6_SUBTREES |
1da177e4 | 54 | struct fib6_node *subtree; |
8bce65b9 | 55 | #endif |
1da177e4 LT |
56 | struct rt6_info *leaf; |
57 | ||
58 | __u16 fn_bit; /* bit key */ | |
59 | __u16 fn_flags; | |
60 | __u32 fn_sernum; | |
f11e6659 | 61 | struct rt6_info *rr_ptr; |
1da177e4 LT |
62 | }; |
63 | ||
7fc33165 YH |
64 | #ifndef CONFIG_IPV6_SUBTREES |
65 | #define FIB6_SUBTREE(fn) NULL | |
66 | #else | |
67 | #define FIB6_SUBTREE(fn) ((fn)->subtree) | |
68 | #endif | |
1da177e4 LT |
69 | |
70 | /* | |
71 | * routing information | |
72 | * | |
73 | */ | |
74 | ||
75 | struct rt6key | |
76 | { | |
77 | struct in6_addr addr; | |
78 | int plen; | |
79 | }; | |
80 | ||
c71099ac TG |
81 | struct fib6_table; |
82 | ||
1da177e4 LT |
83 | struct rt6_info |
84 | { | |
85 | union { | |
86 | struct dst_entry dst; | |
1da177e4 LT |
87 | } u; |
88 | ||
89 | struct inet6_dev *rt6i_idev; | |
90 | ||
91 | #define rt6i_dev u.dst.dev | |
92 | #define rt6i_nexthop u.dst.neighbour | |
93 | #define rt6i_expires u.dst.expires | |
94 | ||
95 | struct fib6_node *rt6i_node; | |
96 | ||
97 | struct in6_addr rt6i_gateway; | |
98 | ||
99 | u32 rt6i_flags; | |
100 | u32 rt6i_metric; | |
101 | atomic_t rt6i_ref; | |
102 | ||
b4ce9277 | 103 | /* more non-fragment space at head required */ |
a1b05140 | 104 | unsigned short rt6i_nfheader_len; |
1da177e4 LT |
105 | |
106 | u8 rt6i_protocol; | |
a47ed4cd | 107 | |
b4ce9277 HX |
108 | struct fib6_table *rt6i_table; |
109 | ||
110 | struct rt6key rt6i_dst; | |
111 | ||
a47ed4cd NT |
112 | #ifdef CONFIG_XFRM |
113 | u32 rt6i_flow_cache_genid; | |
114 | #endif | |
b4ce9277 HX |
115 | |
116 | struct rt6key rt6i_src; | |
1da177e4 LT |
117 | }; |
118 | ||
7a3025b1 YH |
119 | static inline struct inet6_dev *ip6_dst_idev(struct dst_entry *dst) |
120 | { | |
121 | return ((struct rt6_info *)dst)->rt6i_idev; | |
122 | } | |
123 | ||
1da177e4 LT |
124 | struct fib6_walker_t |
125 | { | |
126 | struct fib6_walker_t *prev, *next; | |
127 | struct fib6_node *root, *node; | |
128 | struct rt6_info *leaf; | |
129 | unsigned char state; | |
130 | unsigned char prune; | |
131 | int (*func)(struct fib6_walker_t *); | |
132 | void *args; | |
133 | }; | |
134 | ||
1da177e4 LT |
135 | struct rt6_statistics { |
136 | __u32 fib_nodes; | |
137 | __u32 fib_route_nodes; | |
138 | __u32 fib_rt_alloc; /* permanent routes */ | |
139 | __u32 fib_rt_entries; /* rt entries in table */ | |
140 | __u32 fib_rt_cache; /* cache routes */ | |
141 | __u32 fib_discarded_routes; | |
142 | }; | |
143 | ||
144 | #define RTN_TL_ROOT 0x0001 | |
145 | #define RTN_ROOT 0x0002 /* tree root node */ | |
146 | #define RTN_RTINFO 0x0004 /* node with valid routing info */ | |
147 | ||
148 | /* | |
149 | * priority levels (or metrics) | |
150 | * | |
151 | */ | |
152 | ||
1da177e4 | 153 | |
c71099ac TG |
154 | struct fib6_table { |
155 | struct hlist_node tb6_hlist; | |
156 | u32 tb6_id; | |
157 | rwlock_t tb6_lock; | |
158 | struct fib6_node tb6_root; | |
159 | }; | |
160 | ||
161 | #define RT6_TABLE_UNSPEC RT_TABLE_UNSPEC | |
162 | #define RT6_TABLE_MAIN RT_TABLE_MAIN | |
c71099ac TG |
163 | #define RT6_TABLE_DFLT RT6_TABLE_MAIN |
164 | #define RT6_TABLE_INFO RT6_TABLE_MAIN | |
165 | #define RT6_TABLE_PREFIX RT6_TABLE_MAIN | |
166 | ||
167 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES | |
168 | #define FIB6_TABLE_MIN 1 | |
169 | #define FIB6_TABLE_MAX RT_TABLE_MAX | |
101367c2 | 170 | #define RT6_TABLE_LOCAL RT_TABLE_LOCAL |
c71099ac TG |
171 | #else |
172 | #define FIB6_TABLE_MIN RT_TABLE_MAIN | |
173 | #define FIB6_TABLE_MAX FIB6_TABLE_MIN | |
101367c2 | 174 | #define RT6_TABLE_LOCAL RT6_TABLE_MAIN |
c71099ac TG |
175 | #endif |
176 | ||
8ed67789 DL |
177 | typedef struct rt6_info *(*pol_lookup_t)(struct net *, |
178 | struct fib6_table *, | |
c71099ac | 179 | struct flowi *, int); |
1da177e4 LT |
180 | |
181 | /* | |
182 | * exported functions | |
183 | */ | |
184 | ||
58f09b78 DL |
185 | extern struct fib6_table *fib6_get_table(struct net *net, u32 id); |
186 | extern struct fib6_table *fib6_new_table(struct net *net, u32 id); | |
187 | extern struct dst_entry *fib6_rule_lookup(struct net *net, | |
188 | struct flowi *fl, int flags, | |
189 | pol_lookup_t lookup); | |
c71099ac | 190 | |
1da177e4 LT |
191 | extern struct fib6_node *fib6_lookup(struct fib6_node *root, |
192 | struct in6_addr *daddr, | |
193 | struct in6_addr *saddr); | |
194 | ||
195 | struct fib6_node *fib6_locate(struct fib6_node *root, | |
196 | struct in6_addr *daddr, int dst_len, | |
197 | struct in6_addr *saddr, int src_len); | |
198 | ||
f3db4851 DL |
199 | extern void fib6_clean_all(struct net *net, |
200 | int (*func)(struct rt6_info *, void *arg), | |
c71099ac TG |
201 | int prune, void *arg); |
202 | ||
1da177e4 LT |
203 | extern int fib6_add(struct fib6_node *root, |
204 | struct rt6_info *rt, | |
86872cb5 | 205 | struct nl_info *info); |
1da177e4 LT |
206 | |
207 | extern int fib6_del(struct rt6_info *rt, | |
86872cb5 | 208 | struct nl_info *info); |
1da177e4 LT |
209 | |
210 | extern void inet6_rt_notify(int event, struct rt6_info *rt, | |
86872cb5 | 211 | struct nl_info *info); |
1da177e4 | 212 | |
5b7c931d DL |
213 | extern void fib6_run_gc(unsigned long expires, |
214 | struct net *net); | |
1da177e4 LT |
215 | |
216 | extern void fib6_gc_cleanup(void); | |
217 | ||
d63bddbe | 218 | extern int fib6_init(void); |
101367c2 | 219 | |
7e5449c2 | 220 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
9eb87f3f | 221 | extern int fib6_rules_init(void); |
101367c2 | 222 | extern void fib6_rules_cleanup(void); |
7e5449c2 DL |
223 | #else |
224 | static inline int fib6_rules_init(void) | |
225 | { | |
226 | return 0; | |
227 | } | |
228 | static inline void fib6_rules_cleanup(void) | |
229 | { | |
230 | return ; | |
231 | } | |
232 | #endif | |
1da177e4 LT |
233 | #endif |
234 | #endif |