xref: /linux/net/ipv4/fib_lookup.h (revision cc04a46f11ea046ed53e2c832ae29e4790f7e35f)
1 #ifndef _FIB_LOOKUP_H
2 #define _FIB_LOOKUP_H
3 
4 #include <linux/types.h>
5 #include <linux/list.h>
6 #include <net/ip_fib.h>
7 
8 struct fib_alias {
9 	struct hlist_node	fa_list;
10 	struct fib_info		*fa_info;
11 	u8			fa_tos;
12 	u8			fa_type;
13 	u8			fa_state;
14 	u8			fa_slen;
15 	u32			tb_id;
16 	s16			fa_default;
17 	struct rcu_head		rcu;
18 };
19 
20 #define FA_S_ACCESSED	0x01
21 
22 /* Dont write on fa_state unless needed, to keep it shared on all cpus */
23 static inline void fib_alias_accessed(struct fib_alias *fa)
24 {
25 	if (!(fa->fa_state & FA_S_ACCESSED))
26 		fa->fa_state |= FA_S_ACCESSED;
27 }
28 
29 /* Exported by fib_semantics.c */
30 void fib_release_info(struct fib_info *);
31 struct fib_info *fib_create_info(struct fib_config *cfg);
32 int fib_nh_match(struct fib_config *cfg, struct fib_info *fi);
33 int fib_dump_info(struct sk_buff *skb, u32 pid, u32 seq, int event, u32 tb_id,
34 		  u8 type, __be32 dst, int dst_len, u8 tos, struct fib_info *fi,
35 		  unsigned int);
36 void rtmsg_fib(int event, __be32 key, struct fib_alias *fa, int dst_len,
37 	       u32 tb_id, const struct nl_info *info, unsigned int nlm_flags);
38 
39 static inline void fib_result_assign(struct fib_result *res,
40 				     struct fib_info *fi)
41 {
42 	/* we used to play games with refcounts, but we now use RCU */
43 	res->fi = fi;
44 }
45 
46 struct fib_prop {
47 	int	error;
48 	u8	scope;
49 };
50 
51 extern const struct fib_prop fib_props[RTN_MAX + 1];
52 
53 #endif /* _FIB_LOOKUP_H */
54