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/rtnetlink.h>
9
10struct fib_rule
11{
12 struct list_head list;
13 atomic_t refcnt;
14 int ifindex;
15 char ifname[IFNAMSIZ];
16 u32 mark;
17 u32 mark_mask;
18 u32 pref;
19 u32 flags;
20 u32 table;
21 u8 action;
22 u32 target;
23 struct fib_rule * ctarget;
24 struct rcu_head rcu;
25 struct net * fr_net;
26};
27
28struct fib_lookup_arg
29{
30 void *lookup_ptr;
31 void *result;
32 struct fib_rule *rule;
33};
34
35struct fib_rules_ops
36{
37 int family;
38 struct list_head list;
39 int rule_size;
40 int addr_size;
41 int unresolved_rules;
42 int nr_goto_rules;
43
44 int (*action)(struct fib_rule *,
45 struct flowi *, int,
46 struct fib_lookup_arg *);
47 int (*match)(struct fib_rule *,
48 struct flowi *, int);
49 int (*configure)(struct fib_rule *,
50 struct sk_buff *,
51 struct fib_rule_hdr *,
52 struct nlattr **);
53 int (*compare)(struct fib_rule *,
54 struct fib_rule_hdr *,
55 struct nlattr **);
56 int (*fill)(struct fib_rule *, struct sk_buff *,
57 struct fib_rule_hdr *);
58 u32 (*default_pref)(struct fib_rules_ops *ops);
59 size_t (*nlmsg_payload)(struct fib_rule *);
60
61
62
63 void (*flush_cache)(struct fib_rules_ops *ops);
64
65 int nlgroup;
66 const struct nla_policy *policy;
67 struct list_head rules_list;
68 struct module *owner;
69 struct net *fro_net;
70};
71
72#define FRA_GENERIC_POLICY \
73 [FRA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, \
74 [FRA_PRIORITY] = { .type = NLA_U32 }, \
75 [FRA_FWMARK] = { .type = NLA_U32 }, \
76 [FRA_FWMASK] = { .type = NLA_U32 }, \
77 [FRA_TABLE] = { .type = NLA_U32 }, \
78 [FRA_GOTO] = { .type = NLA_U32 }
79
80static inline void fib_rule_get(struct fib_rule *rule)
81{
82 atomic_inc(&rule->refcnt);
83}
84
85static inline void fib_rule_put_rcu(struct rcu_head *head)
86{
87 struct fib_rule *rule = container_of(head, struct fib_rule, rcu);
88 release_net(rule->fr_net);
89 kfree(rule);
90}
91
92static inline void fib_rule_put(struct fib_rule *rule)
93{
94 if (atomic_dec_and_test(&rule->refcnt))
95 call_rcu(&rule->rcu, fib_rule_put_rcu);
96}
97
98static inline u32 frh_get_table(struct fib_rule_hdr *frh, struct nlattr **nla)
99{
100 if (nla[FRA_TABLE])
101 return nla_get_u32(nla[FRA_TABLE]);
102 return frh->table;
103}
104
105extern int fib_rules_register(struct fib_rules_ops *);
106extern void fib_rules_unregister(struct fib_rules_ops *);
107extern void fib_rules_cleanup_ops(struct fib_rules_ops *);
108
109extern int fib_rules_lookup(struct fib_rules_ops *,
110 struct flowi *, int flags,
111 struct fib_lookup_arg *);
112extern int fib_default_rule_add(struct fib_rules_ops *,
113 u32 pref, u32 table,
114 u32 flags);
115#endif
116
