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
40 #define FIB_LOOKUP_IGNORE_LINKSTATE 2
43 struct fib_rules_ops {
45 struct list_head list;
51 int (*action)(struct fib_rule *,
53 struct fib_lookup_arg *);
54 bool (*suppress)(struct fib_rule *,
55 struct fib_lookup_arg *);
56 int (*match)(struct fib_rule *,
58 int (*configure)(struct fib_rule *,
60 struct fib_rule_hdr *,
62 int (*delete)(struct fib_rule *);
63 int (*compare)(struct fib_rule *,
64 struct fib_rule_hdr *,
66 int (*fill)(struct fib_rule *, struct sk_buff *,
67 struct fib_rule_hdr *);
68 u32 (*default_pref)(struct fib_rules_ops *ops);
69 size_t (*nlmsg_payload)(struct fib_rule *);
71 /* Called after modifications to the rules set, must flush
72 * the route cache if one exists. */
73 void (*flush_cache)(struct fib_rules_ops *ops);
76 const struct nla_policy *policy;
77 struct list_head rules_list;
83 #define FRA_GENERIC_POLICY \
84 [FRA_IIFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, \
85 [FRA_OIFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, \
86 [FRA_PRIORITY] = { .type = NLA_U32 }, \
87 [FRA_FWMARK] = { .type = NLA_U32 }, \
88 [FRA_FWMASK] = { .type = NLA_U32 }, \
89 [FRA_TABLE] = { .type = NLA_U32 }, \
90 [FRA_SUPPRESS_PREFIXLEN] = { .type = NLA_U32 }, \
91 [FRA_SUPPRESS_IFGROUP] = { .type = NLA_U32 }, \
92 [FRA_GOTO] = { .type = NLA_U32 }
94 static inline void fib_rule_get(struct fib_rule *rule)
96 atomic_inc(&rule->refcnt);
99 static inline void fib_rule_put(struct fib_rule *rule)
101 if (atomic_dec_and_test(&rule->refcnt))
102 kfree_rcu(rule, rcu);
105 static inline u32 frh_get_table(struct fib_rule_hdr *frh, struct nlattr **nla)
108 return nla_get_u32(nla[FRA_TABLE]);
112 struct fib_rules_ops *fib_rules_register(const struct fib_rules_ops *,
114 void fib_rules_unregister(struct fib_rules_ops *);
116 int fib_rules_lookup(struct fib_rules_ops *, struct flowi *, int flags,
117 struct fib_lookup_arg *);
118 int fib_default_rule_add(struct fib_rules_ops *, u32 pref, u32 table,
120 u32 fib_default_rule_pref(struct fib_rules_ops *ops);