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13#ifndef _IP6_FIB_H
14#define _IP6_FIB_H
15
16#include <linux/ipv6_route.h>
17#include <linux/rtnetlink.h>
18#include <linux/spinlock.h>
19#include <net/dst.h>
20#include <net/flow.h>
21#include <net/netlink.h>
22#include <net/inetpeer.h>
23
24#ifdef CONFIG_IPV6_MULTIPLE_TABLES
25#define FIB6_TABLE_HASHSZ 256
26#else
27#define FIB6_TABLE_HASHSZ 1
28#endif
29
30struct rt6_info;
31
32struct fib6_config {
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 u32 fc_type;
41
42 struct in6_addr fc_dst;
43 struct in6_addr fc_src;
44 struct in6_addr fc_prefsrc;
45 struct in6_addr fc_gateway;
46
47 unsigned long fc_expires;
48 struct nlattr *fc_mx;
49 int fc_mx_len;
50 int fc_mp_len;
51 struct nlattr *fc_mp;
52
53 struct nl_info fc_nlinfo;
54};
55
56struct fib6_node {
57 struct fib6_node *parent;
58 struct fib6_node *left;
59 struct fib6_node *right;
60#ifdef CONFIG_IPV6_SUBTREES
61 struct fib6_node *subtree;
62#endif
63 struct rt6_info *leaf;
64
65 __u16 fn_bit;
66 __u16 fn_flags;
67 __u32 fn_sernum;
68 struct rt6_info *rr_ptr;
69};
70
71#ifndef CONFIG_IPV6_SUBTREES
72#define FIB6_SUBTREE(fn) NULL
73#else
74#define FIB6_SUBTREE(fn) ((fn)->subtree)
75#endif
76
77
78
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80
81
82struct rt6key {
83 struct in6_addr addr;
84 int plen;
85};
86
87struct fib6_table;
88
89struct rt6_info {
90 struct dst_entry dst;
91
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95
96
97 struct fib6_table *rt6i_table;
98 struct fib6_node *rt6i_node;
99
100 struct in6_addr rt6i_gateway;
101
102
103
104
105
106
107 struct list_head rt6i_siblings;
108 unsigned int rt6i_nsiblings;
109
110 atomic_t rt6i_ref;
111
112
113 struct rt6key rt6i_dst ____cacheline_aligned_in_smp;
114 u32 rt6i_flags;
115 struct rt6key rt6i_src;
116 struct rt6key rt6i_prefsrc;
117 u32 rt6i_metric;
118
119 struct inet6_dev *rt6i_idev;
120 unsigned long _rt6i_peer;
121
122 u32 rt6i_genid;
123
124
125 unsigned short rt6i_nfheader_len;
126
127 u8 rt6i_protocol;
128};
129
130static inline struct inet_peer *rt6_peer_ptr(struct rt6_info *rt)
131{
132 return inetpeer_ptr(rt->_rt6i_peer);
133}
134
135static inline bool rt6_has_peer(struct rt6_info *rt)
136{
137 return inetpeer_ptr_is_peer(rt->_rt6i_peer);
138}
139
140static inline void __rt6_set_peer(struct rt6_info *rt, struct inet_peer *peer)
141{
142 __inetpeer_ptr_set_peer(&rt->_rt6i_peer, peer);
143}
144
145static inline bool rt6_set_peer(struct rt6_info *rt, struct inet_peer *peer)
146{
147 return inetpeer_ptr_set_peer(&rt->_rt6i_peer, peer);
148}
149
150static inline void rt6_init_peer(struct rt6_info *rt, struct inet_peer_base *base)
151{
152 inetpeer_init_ptr(&rt->_rt6i_peer, base);
153}
154
155static inline void rt6_transfer_peer(struct rt6_info *rt, struct rt6_info *ort)
156{
157 inetpeer_transfer_peer(&rt->_rt6i_peer, &ort->_rt6i_peer);
158}
159
160static inline struct inet6_dev *ip6_dst_idev(struct dst_entry *dst)
161{
162 return ((struct rt6_info *)dst)->rt6i_idev;
163}
164
165static inline void rt6_clean_expires(struct rt6_info *rt)
166{
167 rt->rt6i_flags &= ~RTF_EXPIRES;
168}
169
170static inline void rt6_set_expires(struct rt6_info *rt, unsigned long expires)
171{
172 rt->dst.expires = expires;
173 rt->rt6i_flags |= RTF_EXPIRES;
174}
175
176static inline void rt6_update_expires(struct rt6_info *rt0, int timeout)
177{
178 struct rt6_info *rt;
179
180 for (rt = rt0; rt && !(rt->rt6i_flags & RTF_EXPIRES);
181 rt = (struct rt6_info *)rt->dst.from);
182 if (rt && rt != rt0)
183 rt0->dst.expires = rt->dst.expires;
184
185 dst_set_expires(&rt0->dst, timeout);
186 rt0->rt6i_flags |= RTF_EXPIRES;
187}
188
189static inline void rt6_set_from(struct rt6_info *rt, struct rt6_info *from)
190{
191 struct dst_entry *new = (struct dst_entry *) from;
192
193 rt->rt6i_flags &= ~RTF_EXPIRES;
194 dst_hold(new);
195 rt->dst.from = new;
196}
197
198static inline void ip6_rt_put(struct rt6_info *rt)
199{
200
201
202
203 BUILD_BUG_ON(offsetof(struct rt6_info, dst) != 0);
204 dst_release(&rt->dst);
205}
206
207struct fib6_walker_t {
208 struct list_head lh;
209 struct fib6_node *root, *node;
210 struct rt6_info *leaf;
211 unsigned char state;
212 unsigned char prune;
213 unsigned int skip;
214 unsigned int count;
215 int (*func)(struct fib6_walker_t *);
216 void *args;
217};
218
219struct rt6_statistics {
220 __u32 fib_nodes;
221 __u32 fib_route_nodes;
222 __u32 fib_rt_alloc;
223 __u32 fib_rt_entries;
224 __u32 fib_rt_cache;
225 __u32 fib_discarded_routes;
226};
227
228#define RTN_TL_ROOT 0x0001
229#define RTN_ROOT 0x0002
230#define RTN_RTINFO 0x0004
231
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234
235
236
237
238struct fib6_table {
239 struct hlist_node tb6_hlist;
240 u32 tb6_id;
241 rwlock_t tb6_lock;
242 struct fib6_node tb6_root;
243 struct inet_peer_base tb6_peers;
244};
245
246#define RT6_TABLE_UNSPEC RT_TABLE_UNSPEC
247#define RT6_TABLE_MAIN RT_TABLE_MAIN
248#define RT6_TABLE_DFLT RT6_TABLE_MAIN
249#define RT6_TABLE_INFO RT6_TABLE_MAIN
250#define RT6_TABLE_PREFIX RT6_TABLE_MAIN
251
252#ifdef CONFIG_IPV6_MULTIPLE_TABLES
253#define FIB6_TABLE_MIN 1
254#define FIB6_TABLE_MAX RT_TABLE_MAX
255#define RT6_TABLE_LOCAL RT_TABLE_LOCAL
256#else
257#define FIB6_TABLE_MIN RT_TABLE_MAIN
258#define FIB6_TABLE_MAX FIB6_TABLE_MIN
259#define RT6_TABLE_LOCAL RT6_TABLE_MAIN
260#endif
261
262typedef struct rt6_info *(*pol_lookup_t)(struct net *,
263 struct fib6_table *,
264 struct flowi6 *, int);
265
266
267
268
269
270extern struct fib6_table *fib6_get_table(struct net *net, u32 id);
271extern struct fib6_table *fib6_new_table(struct net *net, u32 id);
272extern struct dst_entry *fib6_rule_lookup(struct net *net,
273 struct flowi6 *fl6, int flags,
274 pol_lookup_t lookup);
275
276extern struct fib6_node *fib6_lookup(struct fib6_node *root,
277 const struct in6_addr *daddr,
278 const struct in6_addr *saddr);
279
280struct fib6_node *fib6_locate(struct fib6_node *root,
281 const struct in6_addr *daddr, int dst_len,
282 const struct in6_addr *saddr, int src_len);
283
284extern void fib6_clean_all_ro(struct net *net,
285 int (*func)(struct rt6_info *, void *arg),
286 int prune, void *arg);
287
288extern void fib6_clean_all(struct net *net,
289 int (*func)(struct rt6_info *, void *arg),
290 int prune, void *arg);
291
292extern int fib6_add(struct fib6_node *root,
293 struct rt6_info *rt,
294 struct nl_info *info);
295
296extern int fib6_del(struct rt6_info *rt,
297 struct nl_info *info);
298
299extern void inet6_rt_notify(int event, struct rt6_info *rt,
300 struct nl_info *info);
301
302extern void fib6_run_gc(unsigned long expires,
303 struct net *net, bool force);
304
305extern void fib6_gc_cleanup(void);
306
307extern int fib6_init(void);
308
309#ifdef CONFIG_IPV6_MULTIPLE_TABLES
310extern int fib6_rules_init(void);
311extern void fib6_rules_cleanup(void);
312#else
313static inline int fib6_rules_init(void)
314{
315 return 0;
316}
317static inline void fib6_rules_cleanup(void)
318{
319 return ;
320}
321#endif
322#endif
323