[NET] rules: Unified rules dumping
[linux-2.6.git] / include / net / fib_rules.h
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
10 struct 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         struct rcu_head         rcu;
23 };
24
25 struct fib_lookup_arg
26 {
27         void                    *lookup_ptr;
28         void                    *result;
29         struct fib_rule         *rule;
30 };
31
32 struct fib_rules_ops
33 {
34         int                     family;
35         struct list_head        list;
36         int                     rule_size;
37         int                     addr_size;
38
39         int                     (*action)(struct fib_rule *,
40                                           struct flowi *, int,
41                                           struct fib_lookup_arg *);
42         int                     (*match)(struct fib_rule *,
43                                          struct flowi *, int);
44         int                     (*configure)(struct fib_rule *,
45                                              struct sk_buff *,
46                                              struct nlmsghdr *,
47                                              struct fib_rule_hdr *,
48                                              struct nlattr **);
49         int                     (*compare)(struct fib_rule *,
50                                            struct fib_rule_hdr *,
51                                            struct nlattr **);
52         int                     (*fill)(struct fib_rule *, struct sk_buff *,
53                                         struct nlmsghdr *,
54                                         struct fib_rule_hdr *);
55         u32                     (*default_pref)(void);
56         size_t                  (*nlmsg_payload)(struct fib_rule *);
57
58         int                     nlgroup;
59         struct nla_policy       *policy;
60         struct list_head        *rules_list;
61         struct module           *owner;
62 };
63
64 #define FRA_GENERIC_POLICY \
65         [FRA_IFNAME]    = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, \
66         [FRA_PRIORITY]  = { .type = NLA_U32 }, \
67         [FRA_FWMARK]    = { .type = NLA_U32 }, \
68         [FRA_FWMASK]    = { .type = NLA_U32 }, \
69         [FRA_TABLE]     = { .type = NLA_U32 }
70
71 static inline void fib_rule_get(struct fib_rule *rule)
72 {
73         atomic_inc(&rule->refcnt);
74 }
75
76 static inline void fib_rule_put_rcu(struct rcu_head *head)
77 {
78         struct fib_rule *rule = container_of(head, struct fib_rule, rcu);
79         kfree(rule);
80 }
81
82 static inline void fib_rule_put(struct fib_rule *rule)
83 {
84         if (atomic_dec_and_test(&rule->refcnt))
85                 call_rcu(&rule->rcu, fib_rule_put_rcu);
86 }
87
88 static inline u32 frh_get_table(struct fib_rule_hdr *frh, struct nlattr **nla)
89 {
90         if (nla[FRA_TABLE])
91                 return nla_get_u32(nla[FRA_TABLE]);
92         return frh->table;
93 }
94
95 extern int                      fib_rules_register(struct fib_rules_ops *);
96 extern int                      fib_rules_unregister(struct fib_rules_ops *);
97
98 extern int                      fib_rules_lookup(struct fib_rules_ops *,
99                                                  struct flowi *, int flags,
100                                                  struct fib_lookup_arg *);
101 #endif