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 * ctarget;
24 char iifname[IFNAMSIZ];
25 char oifname[IFNAMSIZ];
30 struct fib_lookup_arg {
33 struct fib_rule *rule;
36 struct fib_rules_ops {
38 struct list_head list;
44 int (*action)(struct fib_rule *,
46 struct fib_lookup_arg *);
47 int (*match)(struct fib_rule *,
49 int (*configure)(struct fib_rule *,
51 struct fib_rule_hdr *,
53 int (*compare)(struct fib_rule *,
54 struct fib_rule_hdr *,
56 int (*fill)(struct fib_rule *, struct sk_buff *,
57 struct fib_rule_hdr *);
58 u32 (*default_pref)(struct fib_rules_ops *ops);
59 size_t (*nlmsg_payload)(struct fib_rule *);
61 /* Called after modifications to the rules set, must flush
62 * the route cache if one exists. */
63 void (*flush_cache)(struct fib_rules_ops *ops);
66 const struct nla_policy *policy;
67 struct list_head rules_list;
73 #define FRA_GENERIC_POLICY \
74 [FRA_IIFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, \
75 [FRA_OIFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, \
76 [FRA_PRIORITY] = { .type = NLA_U32 }, \
77 [FRA_FWMARK] = { .type = NLA_U32 }, \
78 [FRA_FWMASK] = { .type = NLA_U32 }, \
79 [FRA_TABLE] = { .type = NLA_U32 }, \
80 [FRA_GOTO] = { .type = NLA_U32 }
82 static inline void fib_rule_get(struct fib_rule *rule)
84 atomic_inc(&rule->refcnt);
87 static inline void fib_rule_put_rcu(struct rcu_head *head)
89 struct fib_rule *rule = container_of(head, struct fib_rule, rcu);
90 release_net(rule->fr_net);
94 static inline void fib_rule_put(struct fib_rule *rule)
96 if (atomic_dec_and_test(&rule->refcnt))
97 call_rcu(&rule->rcu, fib_rule_put_rcu);
100 static inline u32 frh_get_table(struct fib_rule_hdr *frh, struct nlattr **nla)
103 return nla_get_u32(nla[FRA_TABLE]);
107 extern struct fib_rules_ops *fib_rules_register(const struct fib_rules_ops *, struct net *);
108 extern void fib_rules_unregister(struct fib_rules_ops *);
109 extern void fib_rules_cleanup_ops(struct fib_rules_ops *);
111 extern int fib_rules_lookup(struct fib_rules_ops *,
112 struct flowi *, int flags,
113 struct fib_lookup_arg *);
114 extern int fib_default_rule_add(struct fib_rules_ops *,
117 extern u32 fib_default_rule_pref(struct fib_rules_ops *ops);