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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> | |
b3419363 | 24 | #include <net/inetpeer.h> |
1da177e4 | 25 | |
a33bc5c1 NH |
26 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
27 | #define FIB6_TABLE_HASHSZ 256 | |
28 | #else | |
29 | #define FIB6_TABLE_HASHSZ 1 | |
30 | #endif | |
31 | ||
1da177e4 LT |
32 | struct rt6_info; |
33 | ||
fd2c3ef7 | 34 | struct fib6_config { |
86872cb5 TG |
35 | u32 fc_table; |
36 | u32 fc_metric; | |
37 | int fc_dst_len; | |
38 | int fc_src_len; | |
39 | int fc_ifindex; | |
40 | u32 fc_flags; | |
41 | u32 fc_protocol; | |
42 | ||
43 | struct in6_addr fc_dst; | |
44 | struct in6_addr fc_src; | |
c3968a85 | 45 | struct in6_addr fc_prefsrc; |
86872cb5 TG |
46 | struct in6_addr fc_gateway; |
47 | ||
48 | unsigned long fc_expires; | |
49 | struct nlattr *fc_mx; | |
50 | int fc_mx_len; | |
51 | ||
52 | struct nl_info fc_nlinfo; | |
53 | }; | |
54 | ||
fd2c3ef7 | 55 | struct fib6_node { |
1da177e4 LT |
56 | struct fib6_node *parent; |
57 | struct fib6_node *left; | |
58 | struct fib6_node *right; | |
8bce65b9 | 59 | #ifdef CONFIG_IPV6_SUBTREES |
1da177e4 | 60 | struct fib6_node *subtree; |
8bce65b9 | 61 | #endif |
1da177e4 LT |
62 | struct rt6_info *leaf; |
63 | ||
64 | __u16 fn_bit; /* bit key */ | |
65 | __u16 fn_flags; | |
66 | __u32 fn_sernum; | |
f11e6659 | 67 | struct rt6_info *rr_ptr; |
1da177e4 LT |
68 | }; |
69 | ||
7fc33165 YH |
70 | #ifndef CONFIG_IPV6_SUBTREES |
71 | #define FIB6_SUBTREE(fn) NULL | |
72 | #else | |
73 | #define FIB6_SUBTREE(fn) ((fn)->subtree) | |
74 | #endif | |
1da177e4 LT |
75 | |
76 | /* | |
77 | * routing information | |
78 | * | |
79 | */ | |
80 | ||
fd2c3ef7 | 81 | struct rt6key { |
1da177e4 LT |
82 | struct in6_addr addr; |
83 | int plen; | |
84 | }; | |
85 | ||
c71099ac TG |
86 | struct fib6_table; |
87 | ||
fd2c3ef7 | 88 | struct rt6_info { |
d8d1f30b | 89 | struct dst_entry dst; |
1da177e4 | 90 | |
d8d1f30b CG |
91 | #define rt6i_dev dst.dev |
92 | #define rt6i_nexthop dst.neighbour | |
93 | #define rt6i_expires dst.expires | |
1da177e4 | 94 | |
bd2c77a0 YH |
95 | /* |
96 | * Tail elements of dst_entry (__refcnt etc.) | |
97 | * and these elements (rarely used in hot path) are in | |
98 | * the same cache line. | |
99 | */ | |
100 | struct fib6_table *rt6i_table; | |
1da177e4 LT |
101 | struct fib6_node *rt6i_node; |
102 | ||
103 | struct in6_addr rt6i_gateway; | |
1da177e4 | 104 | |
bd2c77a0 | 105 | atomic_t rt6i_ref; |
a47ed4cd | 106 | |
bd2c77a0 YH |
107 | /* These are in a separate cache line. */ |
108 | struct rt6key rt6i_dst ____cacheline_aligned_in_smp; | |
109 | u32 rt6i_flags; | |
110 | struct rt6key rt6i_src; | |
c3968a85 | 111 | struct rt6key rt6i_prefsrc; |
bd2c77a0 | 112 | u32 rt6i_metric; |
6431cbc2 | 113 | u32 rt6i_peer_genid; |
b4ce9277 | 114 | |
bd2c77a0 | 115 | struct inet6_dev *rt6i_idev; |
b3419363 | 116 | struct inet_peer *rt6i_peer; |
b4ce9277 | 117 | |
a47ed4cd NT |
118 | #ifdef CONFIG_XFRM |
119 | u32 rt6i_flow_cache_genid; | |
120 | #endif | |
bd2c77a0 YH |
121 | /* more non-fragment space at head required */ |
122 | unsigned short rt6i_nfheader_len; | |
b4ce9277 | 123 | |
bd2c77a0 | 124 | u8 rt6i_protocol; |
1da177e4 LT |
125 | }; |
126 | ||
7a3025b1 YH |
127 | static inline struct inet6_dev *ip6_dst_idev(struct dst_entry *dst) |
128 | { | |
129 | return ((struct rt6_info *)dst)->rt6i_idev; | |
130 | } | |
131 | ||
fd2c3ef7 | 132 | struct fib6_walker_t { |
bbef49da | 133 | struct list_head lh; |
1da177e4 LT |
134 | struct fib6_node *root, *node; |
135 | struct rt6_info *leaf; | |
136 | unsigned char state; | |
137 | unsigned char prune; | |
2bec5a36 PM |
138 | unsigned int skip; |
139 | unsigned int count; | |
1da177e4 LT |
140 | int (*func)(struct fib6_walker_t *); |
141 | void *args; | |
142 | }; | |
143 | ||
1da177e4 LT |
144 | struct rt6_statistics { |
145 | __u32 fib_nodes; | |
146 | __u32 fib_route_nodes; | |
147 | __u32 fib_rt_alloc; /* permanent routes */ | |
148 | __u32 fib_rt_entries; /* rt entries in table */ | |
149 | __u32 fib_rt_cache; /* cache routes */ | |
150 | __u32 fib_discarded_routes; | |
151 | }; | |
152 | ||
153 | #define RTN_TL_ROOT 0x0001 | |
154 | #define RTN_ROOT 0x0002 /* tree root node */ | |
155 | #define RTN_RTINFO 0x0004 /* node with valid routing info */ | |
156 | ||
157 | /* | |
158 | * priority levels (or metrics) | |
159 | * | |
160 | */ | |
161 | ||
1da177e4 | 162 | |
c71099ac TG |
163 | struct fib6_table { |
164 | struct hlist_node tb6_hlist; | |
165 | u32 tb6_id; | |
166 | rwlock_t tb6_lock; | |
167 | struct fib6_node tb6_root; | |
168 | }; | |
169 | ||
170 | #define RT6_TABLE_UNSPEC RT_TABLE_UNSPEC | |
171 | #define RT6_TABLE_MAIN RT_TABLE_MAIN | |
c71099ac TG |
172 | #define RT6_TABLE_DFLT RT6_TABLE_MAIN |
173 | #define RT6_TABLE_INFO RT6_TABLE_MAIN | |
174 | #define RT6_TABLE_PREFIX RT6_TABLE_MAIN | |
175 | ||
176 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES | |
177 | #define FIB6_TABLE_MIN 1 | |
178 | #define FIB6_TABLE_MAX RT_TABLE_MAX | |
101367c2 | 179 | #define RT6_TABLE_LOCAL RT_TABLE_LOCAL |
c71099ac TG |
180 | #else |
181 | #define FIB6_TABLE_MIN RT_TABLE_MAIN | |
182 | #define FIB6_TABLE_MAX FIB6_TABLE_MIN | |
101367c2 | 183 | #define RT6_TABLE_LOCAL RT6_TABLE_MAIN |
c71099ac TG |
184 | #endif |
185 | ||
8ed67789 DL |
186 | typedef struct rt6_info *(*pol_lookup_t)(struct net *, |
187 | struct fib6_table *, | |
4c9483b2 | 188 | struct flowi6 *, int); |
1da177e4 LT |
189 | |
190 | /* | |
191 | * exported functions | |
192 | */ | |
193 | ||
58f09b78 DL |
194 | extern struct fib6_table *fib6_get_table(struct net *net, u32 id); |
195 | extern struct fib6_table *fib6_new_table(struct net *net, u32 id); | |
196 | extern struct dst_entry *fib6_rule_lookup(struct net *net, | |
4c9483b2 | 197 | struct flowi6 *fl6, int flags, |
58f09b78 | 198 | pol_lookup_t lookup); |
c71099ac | 199 | |
1da177e4 | 200 | extern struct fib6_node *fib6_lookup(struct fib6_node *root, |
b71d1d42 ED |
201 | const struct in6_addr *daddr, |
202 | const struct in6_addr *saddr); | |
1da177e4 LT |
203 | |
204 | struct fib6_node *fib6_locate(struct fib6_node *root, | |
b71d1d42 ED |
205 | const struct in6_addr *daddr, int dst_len, |
206 | const struct in6_addr *saddr, int src_len); | |
1da177e4 | 207 | |
f3db4851 DL |
208 | extern void fib6_clean_all(struct net *net, |
209 | int (*func)(struct rt6_info *, void *arg), | |
c71099ac TG |
210 | int prune, void *arg); |
211 | ||
1da177e4 LT |
212 | extern int fib6_add(struct fib6_node *root, |
213 | struct rt6_info *rt, | |
86872cb5 | 214 | struct nl_info *info); |
1da177e4 LT |
215 | |
216 | extern int fib6_del(struct rt6_info *rt, | |
86872cb5 | 217 | struct nl_info *info); |
1da177e4 LT |
218 | |
219 | extern void inet6_rt_notify(int event, struct rt6_info *rt, | |
86872cb5 | 220 | struct nl_info *info); |
1da177e4 | 221 | |
5b7c931d DL |
222 | extern void fib6_run_gc(unsigned long expires, |
223 | struct net *net); | |
1da177e4 LT |
224 | |
225 | extern void fib6_gc_cleanup(void); | |
226 | ||
d63bddbe | 227 | extern int fib6_init(void); |
101367c2 | 228 | |
7e5449c2 | 229 | #ifdef CONFIG_IPV6_MULTIPLE_TABLES |
9eb87f3f | 230 | extern int fib6_rules_init(void); |
101367c2 | 231 | extern void fib6_rules_cleanup(void); |
7e5449c2 DL |
232 | #else |
233 | static inline int fib6_rules_init(void) | |
234 | { | |
235 | return 0; | |
236 | } | |
237 | static inline void fib6_rules_cleanup(void) | |
238 | { | |
239 | return ; | |
240 | } | |
241 | #endif | |
1da177e4 LT |
242 | #endif |
243 | #endif |