1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _FIB_LOOKUP_H
3 #define _FIB_LOOKUP_H
4 
5 #include <linux/types.h>
6 #include <linux/list.h>
7 #include <net/inet_dscp.h>
8 #include <net/ip_fib.h>
9 #include <net/nexthop.h>
10 
11 struct fib_alias {
12 	struct hlist_node	fa_list;
13 	struct fib_info		*fa_info;
14 	dscp_t			fa_dscp;
15 	u8			fa_type;
16 	u8			fa_state;
17 	u8			fa_slen;
18 	u32			tb_id;
19 	s16			fa_default;
20 	u8			offload;
21 	u8			trap;
22 	u8			offload_failed;
23 	struct rcu_head		rcu;
24 };
25 
26 #define FA_S_ACCESSED	0x01
27 
28 /* Don't write on fa_state unless needed, to keep it shared on all cpus */
fib_alias_accessed(struct fib_alias * fa)29 static inline void fib_alias_accessed(struct fib_alias *fa)
30 {
31 	if (!(fa->fa_state & FA_S_ACCESSED))
32 		fa->fa_state |= FA_S_ACCESSED;
33 }
34 
35 /* Exported by fib_semantics.c */
36 void fib_release_info(struct fib_info *);
37 struct fib_info *fib_create_info(struct fib_config *cfg,
38 				 struct netlink_ext_ack *extack);
39 int fib_nh_match(struct net *net, struct fib_config *cfg, struct fib_info *fi,
40 		 struct netlink_ext_ack *extack);
41 bool fib_metrics_match(struct fib_config *cfg, struct fib_info *fi);
42 int fib_dump_info(struct sk_buff *skb, u32 pid, u32 seq, int event,
43 		  const struct fib_rt_info *fri, unsigned int flags);
44 void rtmsg_fib(int event, __be32 key, struct fib_alias *fa, int dst_len,
45 	       u32 tb_id, const struct nl_info *info, unsigned int nlm_flags);
46 size_t fib_nlmsg_size(struct fib_info *fi);
47 
fib_result_assign(struct fib_result * res,struct fib_info * fi)48 static inline void fib_result_assign(struct fib_result *res,
49 				     struct fib_info *fi)
50 {
51 	/* we used to play games with refcounts, but we now use RCU */
52 	res->fi = fi;
53 	res->nhc = fib_info_nhc(fi, 0);
54 }
55 
56 struct fib_prop {
57 	int	error;
58 	u8	scope;
59 };
60 
61 extern const struct fib_prop fib_props[RTN_MAX + 1];
62 
63 #endif /* _FIB_LOOKUP_H */
64