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