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13#ifndef _IP6_FIB_H
14#define _IP6_FIB_H
15
16#ifdef __KERNEL__
17
18#include <linux/ipv6_route.h>
19#include <linux/rtnetlink.h>
20#include <linux/spinlock.h>
21#include <net/dst.h>
22#include <net/flow.h>
23#include <net/netlink.h>
24
25#ifdef CONFIG_IPV6_MULTIPLE_TABLES
26#define FIB6_TABLE_HASHSZ 256
27#else
28#define FIB6_TABLE_HASHSZ 1
29#endif
30
31struct rt6_info;
32
33struct fib6_config
34{
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;
45 struct in6_addr fc_gateway;
46
47 unsigned long fc_expires;
48 struct nlattr *fc_mx;
49 int fc_mx_len;
50
51 struct nl_info fc_nlinfo;
52};
53
54struct fib6_node
55{
56 struct fib6_node *parent;
57 struct fib6_node *left;
58 struct fib6_node *right;
59#ifdef CONFIG_IPV6_SUBTREES
60 struct fib6_node *subtree;
61#endif
62 struct rt6_info *leaf;
63
64 __u16 fn_bit;
65 __u16 fn_flags;
66 __u32 fn_sernum;
67 struct rt6_info *rr_ptr;
68};
69
70#ifndef CONFIG_IPV6_SUBTREES
71#define FIB6_SUBTREE(fn) NULL
72#else
73#define FIB6_SUBTREE(fn) ((fn)->subtree)
74#endif
75
76
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79
80
81struct rt6key
82{
83 struct in6_addr addr;
84 int plen;
85};
86
87struct fib6_table;
88
89struct rt6_info
90{
91 union {
92 struct dst_entry dst;
93 } u;
94
95 struct inet6_dev *rt6i_idev;
96
97#define rt6i_dev u.dst.dev
98#define rt6i_nexthop u.dst.neighbour
99#define rt6i_expires u.dst.expires
100
101 struct fib6_node *rt6i_node;
102
103 struct in6_addr rt6i_gateway;
104
105 u32 rt6i_flags;
106 u32 rt6i_metric;
107 atomic_t rt6i_ref;
108
109
110 unsigned short rt6i_nfheader_len;
111
112 u8 rt6i_protocol;
113
114 struct fib6_table *rt6i_table;
115
116 struct rt6key rt6i_dst;
117
118#ifdef CONFIG_XFRM
119 u32 rt6i_flow_cache_genid;
120#endif
121
122 struct rt6key rt6i_src;
123};
124
125static inline struct inet6_dev *ip6_dst_idev(struct dst_entry *dst)
126{
127 return ((struct rt6_info *)dst)->rt6i_idev;
128}
129
130struct fib6_walker_t
131{
132 struct fib6_walker_t *prev, *next;
133 struct fib6_node *root, *node;
134 struct rt6_info *leaf;
135 unsigned char state;
136 unsigned char prune;
137 int (*func)(struct fib6_walker_t *);
138 void *args;
139};
140
141struct rt6_statistics {
142 __u32 fib_nodes;
143 __u32 fib_route_nodes;
144 __u32 fib_rt_alloc;
145 __u32 fib_rt_entries;
146 __u32 fib_rt_cache;
147 __u32 fib_discarded_routes;
148};
149
150#define RTN_TL_ROOT 0x0001
151#define RTN_ROOT 0x0002
152#define RTN_RTINFO 0x0004
153
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158
159
160struct fib6_table {
161 struct hlist_node tb6_hlist;
162 u32 tb6_id;
163 rwlock_t tb6_lock;
164 struct fib6_node tb6_root;
165};
166
167#define RT6_TABLE_UNSPEC RT_TABLE_UNSPEC
168#define RT6_TABLE_MAIN RT_TABLE_MAIN
169#define RT6_TABLE_DFLT RT6_TABLE_MAIN
170#define RT6_TABLE_INFO RT6_TABLE_MAIN
171#define RT6_TABLE_PREFIX RT6_TABLE_MAIN
172
173#ifdef CONFIG_IPV6_MULTIPLE_TABLES
174#define FIB6_TABLE_MIN 1
175#define FIB6_TABLE_MAX RT_TABLE_MAX
176#define RT6_TABLE_LOCAL RT_TABLE_LOCAL
177#else
178#define FIB6_TABLE_MIN RT_TABLE_MAIN
179#define FIB6_TABLE_MAX FIB6_TABLE_MIN
180#define RT6_TABLE_LOCAL RT6_TABLE_MAIN
181#endif
182
183typedef struct rt6_info *(*pol_lookup_t)(struct net *,
184 struct fib6_table *,
185 struct flowi *, int);
186
187
188
189
190
191extern struct fib6_table *fib6_get_table(struct net *net, u32 id);
192extern struct fib6_table *fib6_new_table(struct net *net, u32 id);
193extern struct dst_entry *fib6_rule_lookup(struct net *net,
194 struct flowi *fl, int flags,
195 pol_lookup_t lookup);
196
197extern struct fib6_node *fib6_lookup(struct fib6_node *root,
198 struct in6_addr *daddr,
199 struct in6_addr *saddr);
200
201struct fib6_node *fib6_locate(struct fib6_node *root,
202 struct in6_addr *daddr, int dst_len,
203 struct in6_addr *saddr, int src_len);
204
205extern void fib6_clean_all(struct net *net,
206 int (*func)(struct rt6_info *, void *arg),
207 int prune, void *arg);
208
209extern int fib6_add(struct fib6_node *root,
210 struct rt6_info *rt,
211 struct nl_info *info);
212
213extern int fib6_del(struct rt6_info *rt,
214 struct nl_info *info);
215
216extern void inet6_rt_notify(int event, struct rt6_info *rt,
217 struct nl_info *info);
218
219extern void fib6_run_gc(unsigned long expires,
220 struct net *net);
221
222extern void fib6_gc_cleanup(void);
223
224extern int fib6_init(void);
225
226#ifdef CONFIG_IPV6_MULTIPLE_TABLES
227extern int fib6_rules_init(void);
228extern void fib6_rules_cleanup(void);
229#else
230static inline int fib6_rules_init(void)
231{
232 return 0;
233}
234static inline void fib6_rules_cleanup(void)
235{
236 return ;
237}
238#endif
239#endif
240#endif
241
