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 u8 fa_state = READ_ONCE(fa->fa_state);
32
33 if (!(fa_state & FA_S_ACCESSED))
34 WRITE_ONCE(fa->fa_state, fa_state | FA_S_ACCESSED);
35 }
36
37 /* Exported by fib_semantics.c */
38 void fib_release_info(struct fib_info *);
39 struct fib_info *fib_create_info(struct fib_config *cfg,
40 struct netlink_ext_ack *extack);
41 int fib_nh_match(struct net *net, struct fib_config *cfg, struct fib_info *fi,
42 struct netlink_ext_ack *extack);
43 bool fib_metrics_match(struct fib_config *cfg, struct fib_info *fi);
44 int fib_dump_info(struct sk_buff *skb, u32 pid, u32 seq, int event,
45 const struct fib_rt_info *fri, unsigned int flags);
46 void rtmsg_fib(int event, __be32 key, struct fib_alias *fa, int dst_len,
47 u32 tb_id, const struct nl_info *info, unsigned int nlm_flags);
48 size_t fib_nlmsg_size(struct fib_info *fi);
49
fib_result_assign(struct fib_result * res,struct fib_info * fi)50 static inline void fib_result_assign(struct fib_result *res,
51 struct fib_info *fi)
52 {
53 /* we used to play games with refcounts, but we now use RCU */
54 res->fi = fi;
55 res->nhc = fib_info_nhc(fi, 0);
56 }
57
58 struct fib_prop {
59 int error;
60 u8 scope;
61 };
62
63 extern const struct fib_prop fib_props[RTN_MAX + 1];
64
65 #endif /* _FIB_LOOKUP_H */
66