fib_lookup.h

 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
11struct 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 */
29static 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 */
38void fib_release_info(struct fib_info *);
39struct fib_info *fib_create_info(struct fib_config *cfg,
40				 struct netlink_ext_ack *extack);
41int fib_nh_match(struct net *net, struct fib_config *cfg, struct fib_info *fi,
42		 struct netlink_ext_ack *extack);
43bool fib_metrics_match(struct fib_config *cfg, struct fib_info *fi);
44int fib_dump_info(struct sk_buff *skb, u32 pid, u32 seq, int event,
45		  const struct fib_rt_info *fri, unsigned int flags);
46void 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);
48size_t fib_nlmsg_size(struct fib_info *fi);
49
50static 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
58struct fib_prop {
59	int	error;
60	u8	scope;
61};
62
63extern const struct fib_prop fib_props[RTN_MAX + 1];
64
65#endif /* _FIB_LOOKUP_H */