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