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;
20 /* 3 bytes hole, try to use */
22 struct fib_rule __rcu *ctarget;
28 int suppress_prefixlen;
29 char iifname[IFNAMSIZ];
30 char oifname[IFNAMSIZ];
34 struct fib_lookup_arg {
37 struct fib_rule *rule;
39 #define FIB_LOOKUP_NOREF 1
42 struct fib_rules_ops {
44 struct list_head list;
50 int (*action)(struct fib_rule *,
52 struct fib_lookup_arg *);
53 bool (*suppress)(struct fib_rule *,
54 struct fib_lookup_arg *);
55 int (*match)(struct fib_rule *,
57 int (*configure)(struct fib_rule *,
59 struct fib_rule_hdr *,
61 void (*delete)(struct fib_rule *);
62 int (*compare)(struct fib_rule *,
63 struct fib_rule_hdr *,
65 int (*fill)(struct fib_rule *, struct sk_buff *,
66 struct fib_rule_hdr *);
67 u32 (*default_pref)(struct fib_rules_ops *ops);
68 size_t (*nlmsg_payload)(struct fib_rule *);
70 /* Called after modifications to the rules set, must flush
71 * the route cache if one exists. */
72 void (*flush_cache)(struct fib_rules_ops *ops);
75 const struct nla_policy *policy;
76 struct list_head rules_list;
82 #define FRA_GENERIC_POLICY \
83 [FRA_IIFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, \
84 [FRA_OIFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, \
85 [FRA_PRIORITY] = { .type = NLA_U32 }, \
86 [FRA_FWMARK] = { .type = NLA_U32 }, \
87 [FRA_FWMASK] = { .type = NLA_U32 }, \
88 [FRA_TABLE] = { .type = NLA_U32 }, \
89 [FRA_SUPPRESS_PREFIXLEN] = { .type = NLA_U32 }, \
90 [FRA_SUPPRESS_IFGROUP] = { .type = NLA_U32 }, \
91 [FRA_GOTO] = { .type = NLA_U32 }
93 static inline void fib_rule_get(struct fib_rule *rule)
95 atomic_inc(&rule->refcnt);
98 static inline void fib_rule_put_rcu(struct rcu_head *head)
100 struct fib_rule *rule = container_of(head, struct fib_rule, rcu);
101 release_net(rule->fr_net);
105 static inline void fib_rule_put(struct fib_rule *rule)
107 if (atomic_dec_and_test(&rule->refcnt))
108 call_rcu(&rule->rcu, fib_rule_put_rcu);
111 static inline u32 frh_get_table(struct fib_rule_hdr *frh, struct nlattr **nla)
114 return nla_get_u32(nla[FRA_TABLE]);
118 struct fib_rules_ops *fib_rules_register(const struct fib_rules_ops *,
120 void fib_rules_unregister(struct fib_rules_ops *);
122 int fib_rules_lookup(struct fib_rules_ops *, struct flowi *, int flags,
123 struct fib_lookup_arg *);
124 int fib_default_rule_add(struct fib_rules_ops *, u32 pref, u32 table,
126 u32 fib_default_rule_pref(struct fib_rules_ops *ops);