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Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1#ifndef __NET_FIB_RULES_H
2#define __NET_FIB_RULES_H
3
4#include <linux/types.h>
5#include <linux/netdevice.h>
6#include <linux/fib_rules.h>
7#include <net/flow.h>
8#include <net/netlink.h>
9
10struct fib_rule
11{
12 struct list_head list;
13 atomic_t refcnt;
14 int ifindex;
15 char ifname[IFNAMSIZ];
16 u32 pref;
17 u32 flags;
18 u32 table;
19 u8 action;
20 struct rcu_head rcu;
21};
22
23struct fib_lookup_arg
24{
25 void *lookup_ptr;
26 void *result;
27 struct fib_rule *rule;
28};
29
30struct fib_rules_ops
31{
32 int family;
33 struct list_head list;
34 int rule_size;
35
36 int (*action)(struct fib_rule *,
37 struct flowi *, int,
38 struct fib_lookup_arg *);
39 int (*match)(struct fib_rule *,
40 struct flowi *, int);
41 int (*configure)(struct fib_rule *,
42 struct sk_buff *,
43 struct nlmsghdr *,
44 struct fib_rule_hdr *,
45 struct nlattr **);
46 int (*compare)(struct fib_rule *,
47 struct fib_rule_hdr *,
48 struct nlattr **);
49 int (*fill)(struct fib_rule *, struct sk_buff *,
50 struct nlmsghdr *,
51 struct fib_rule_hdr *);
52 u32 (*default_pref)(void);
53
54 int nlgroup;
55 struct nla_policy *policy;
56 struct list_head *rules_list;
57 struct module *owner;
58};
59
60static inline void fib_rule_get(struct fib_rule *rule)
61{
62 atomic_inc(&rule->refcnt);
63}
64
65static inline void fib_rule_put_rcu(struct rcu_head *head)
66{
67 struct fib_rule *rule = container_of(head, struct fib_rule, rcu);
68 kfree(rule);
69}
70
71static inline void fib_rule_put(struct fib_rule *rule)
72{
73 if (atomic_dec_and_test(&rule->refcnt))
74 call_rcu(&rule->rcu, fib_rule_put_rcu);
75}
76
77static inline u32 frh_get_table(struct fib_rule_hdr *frh, struct nlattr **nla)
78{
79 if (nla[FRA_TABLE])
80 return nla_get_u32(nla[FRA_TABLE]);
81 return frh->table;
82}
83
84extern int fib_rules_register(struct fib_rules_ops *);
85extern int fib_rules_unregister(struct fib_rules_ops *);
86
87extern int fib_rules_lookup(struct fib_rules_ops *,
88 struct flowi *, int flags,
89 struct fib_lookup_arg *);
90
91extern int fib_nl_newrule(struct sk_buff *,
92 struct nlmsghdr *, void *);
93extern int fib_nl_delrule(struct sk_buff *,
94 struct nlmsghdr *, void *);
95extern int fib_rules_dump(struct sk_buff *,
96 struct netlink_callback *, int);
97#endif