1 #ifndef __NET_FIB_RULES_H
2 #define __NET_FIB_RULES_H
4 #include <linux/types.h>
5 #include <linux/slab.h>
6 #include <linux/netdevice.h>
7 #include <linux/fib_rules.h>
9 #include <net/rtnetlink.h>
12 struct list_head list;
23 struct fib_rule __rcu *ctarget;
24 char iifname[IFNAMSIZ];
25 char oifname[IFNAMSIZ];
32 struct fib_lookup_arg {
35 struct fib_rule *rule;
37 #define FIB_LOOKUP_NOREF 1
40 struct fib_rules_ops {
42 struct list_head list;
48 int (*action)(struct fib_rule *,
50 struct fib_lookup_arg *);
51 int (*match)(struct fib_rule *,
53 int (*configure)(struct fib_rule *,
55 struct fib_rule_hdr *,
57 void (*delete)(struct fib_rule *);
58 int (*compare)(struct fib_rule *,
59 struct fib_rule_hdr *,
61 int (*fill)(struct fib_rule *, struct sk_buff *,
62 struct fib_rule_hdr *);
63 u32 (*default_pref)(struct fib_rules_ops *ops);
64 size_t (*nlmsg_payload)(struct fib_rule *);
66 /* Called after modifications to the rules set, must flush
67 * the route cache if one exists. */
68 void (*flush_cache)(struct fib_rules_ops *ops);
71 const struct nla_policy *policy;
72 struct list_head rules_list;
78 #define FRA_GENERIC_POLICY \
79 [FRA_IIFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, \
80 [FRA_OIFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, \
81 [FRA_PRIORITY] = { .type = NLA_U32 }, \
82 [FRA_FWMARK] = { .type = NLA_U32 }, \
83 [FRA_FWMASK] = { .type = NLA_U32 }, \
84 [FRA_TABLE] = { .type = NLA_U32 }, \
85 [FRA_GOTO] = { .type = NLA_U32 }, \
86 [FRA_UID_START] = { .type = NLA_U32 }, \
87 [FRA_UID_END] = { .type = NLA_U32 }
89 static inline void fib_rule_get(struct fib_rule *rule)
91 atomic_inc(&rule->refcnt);
94 static inline void fib_rule_put_rcu(struct rcu_head *head)
96 struct fib_rule *rule = container_of(head, struct fib_rule, rcu);
97 release_net(rule->fr_net);
101 static inline void fib_rule_put(struct fib_rule *rule)
103 if (atomic_dec_and_test(&rule->refcnt))
104 call_rcu(&rule->rcu, fib_rule_put_rcu);
107 static inline u32 frh_get_table(struct fib_rule_hdr *frh, struct nlattr **nla)
110 return nla_get_u32(nla[FRA_TABLE]);
114 extern struct fib_rules_ops *fib_rules_register(const struct fib_rules_ops *, struct net *);
115 extern void fib_rules_unregister(struct fib_rules_ops *);
117 extern int fib_rules_lookup(struct fib_rules_ops *,
118 struct flowi *, int flags,
119 struct fib_lookup_arg *);
120 extern int fib_default_rule_add(struct fib_rules_ops *,
123 extern u32 fib_default_rule_pref(struct fib_rules_ops *ops);