blob: 017aebd9068317f387df8f62de160cc7bad36a08 [file] [log] [blame]
Thomas Graf14c0b972006-08-04 03:38:38 -07001#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>
Thomas Graf9d9e6a52007-03-25 23:20:05 -07008#include <net/rtnetlink.h>
Thomas Graf14c0b972006-08-04 03:38:38 -07009
10struct fib_rule
11{
12 struct list_head list;
13 atomic_t refcnt;
14 int ifindex;
15 char ifname[IFNAMSIZ];
Thomas Grafb8964ed2006-11-09 15:22:18 -080016 u32 mark;
17 u32 mark_mask;
Thomas Graf14c0b972006-08-04 03:38:38 -070018 u32 pref;
19 u32 flags;
20 u32 table;
21 u8 action;
Thomas Graf0947c9fe2007-03-26 17:14:15 -070022 u32 target;
23 struct fib_rule * ctarget;
Thomas Graf14c0b972006-08-04 03:38:38 -070024 struct rcu_head rcu;
25};
26
27struct fib_lookup_arg
28{
29 void *lookup_ptr;
30 void *result;
31 struct fib_rule *rule;
32};
33
34struct fib_rules_ops
35{
36 int family;
37 struct list_head list;
38 int rule_size;
Thomas Grafe1701c62007-03-24 12:46:02 -070039 int addr_size;
Thomas Graf0947c9fe2007-03-26 17:14:15 -070040 int unresolved_rules;
41 int nr_goto_rules;
Thomas Graf14c0b972006-08-04 03:38:38 -070042
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 nlmsghdr *,
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 nlmsghdr *,
58 struct fib_rule_hdr *);
59 u32 (*default_pref)(void);
Thomas Graf339bf982006-11-10 14:10:15 -080060 size_t (*nlmsg_payload)(struct fib_rule *);
Thomas Graf14c0b972006-08-04 03:38:38 -070061
Thomas Graf73417f62007-03-27 13:56:52 -070062 /* Called after modifications to the rules set, must flush
63 * the route cache if one exists. */
64 void (*flush_cache)(void);
65
Thomas Graf14c0b972006-08-04 03:38:38 -070066 int nlgroup;
Patrick McHardyef7c79e2007-06-05 12:38:30 -070067 const struct nla_policy *policy;
Denis V. Lunev76c72d42007-09-16 15:44:27 -070068 struct list_head rules_list;
Thomas Graf14c0b972006-08-04 03:38:38 -070069 struct module *owner;
70};
71
Thomas Graf1f6c9552006-11-09 15:22:48 -080072#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 }, \
Thomas Graf0947c9fe2007-03-26 17:14:15 -070077 [FRA_TABLE] = { .type = NLA_U32 }, \
78 [FRA_GOTO] = { .type = NLA_U32 }
Thomas Graf1f6c9552006-11-09 15:22:48 -080079
Thomas Graf14c0b972006-08-04 03:38:38 -070080static 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 kfree(rule);
89}
90
91static inline void fib_rule_put(struct fib_rule *rule)
92{
93 if (atomic_dec_and_test(&rule->refcnt))
94 call_rcu(&rule->rcu, fib_rule_put_rcu);
95}
96
Patrick McHardy9e762a42006-08-10 23:09:48 -070097static inline u32 frh_get_table(struct fib_rule_hdr *frh, struct nlattr **nla)
98{
99 if (nla[FRA_TABLE])
100 return nla_get_u32(nla[FRA_TABLE]);
101 return frh->table;
102}
103
Thomas Graf14c0b972006-08-04 03:38:38 -0700104extern int fib_rules_register(struct fib_rules_ops *);
105extern int fib_rules_unregister(struct fib_rules_ops *);
106
107extern int fib_rules_lookup(struct fib_rules_ops *,
108 struct flowi *, int flags,
109 struct fib_lookup_arg *);
Thomas Graf14c0b972006-08-04 03:38:38 -0700110#endif