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 */
23 struct fib_rule __rcu *ctarget;
29 int suppress_prefixlen;
30 char iifname[IFNAMSIZ];
31 char oifname[IFNAMSIZ];
37 struct fib_lookup_arg {
40 struct fib_rule *rule;
42 #define FIB_LOOKUP_NOREF 1
43 #define FIB_LOOKUP_IGNORE_LINKSTATE 2
46 struct fib_rules_ops {
48 struct list_head list;
54 int (*action)(struct fib_rule *,
56 struct fib_lookup_arg *);
57 bool (*suppress)(struct fib_rule *,
58 struct fib_lookup_arg *);
59 int (*match)(struct fib_rule *,
61 int (*configure)(struct fib_rule *,
63 struct fib_rule_hdr *,
65 int (*delete)(struct fib_rule *);
66 int (*compare)(struct fib_rule *,
67 struct fib_rule_hdr *,
69 int (*fill)(struct fib_rule *, struct sk_buff *,
70 struct fib_rule_hdr *);
71 size_t (*nlmsg_payload)(struct fib_rule *);
73 /* Called after modifications to the rules set, must flush
74 * the route cache if one exists. */
75 void (*flush_cache)(struct fib_rules_ops *ops);
78 const struct nla_policy *policy;
79 struct list_head rules_list;
85 #define FRA_GENERIC_POLICY \
86 [FRA_IIFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, \
87 [FRA_OIFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, \
88 [FRA_PRIORITY] = { .type = NLA_U32 }, \
89 [FRA_FWMARK] = { .type = NLA_U32 }, \
90 [FRA_FWMASK] = { .type = NLA_U32 }, \
91 [FRA_TABLE] = { .type = NLA_U32 }, \
92 [FRA_GOTO] = { .type = NLA_U32 }, \
93 [FRA_UID_START] = { .type = NLA_U32 }, \
94 [FRA_UID_END] = { .type = NLA_U32 }, \
95 [FRA_SUPPRESS_PREFIXLEN] = { .type = NLA_U32 }, \
96 [FRA_SUPPRESS_IFGROUP] = { .type = NLA_U32 }, \
97 [FRA_GOTO] = { .type = NLA_U32 }
99 static inline void fib_rule_get(struct fib_rule *rule)
101 atomic_inc(&rule->refcnt);
104 static inline void fib_rule_put(struct fib_rule *rule)
106 if (atomic_dec_and_test(&rule->refcnt))
107 kfree_rcu(rule, rcu);
110 static inline u32 frh_get_table(struct fib_rule_hdr *frh, struct nlattr **nla)
113 return nla_get_u32(nla[FRA_TABLE]);
117 struct fib_rules_ops *fib_rules_register(const struct fib_rules_ops *,
119 void fib_rules_unregister(struct fib_rules_ops *);
121 int fib_rules_lookup(struct fib_rules_ops *, struct flowi *, int flags,
122 struct fib_lookup_arg *);
123 int fib_default_rule_add(struct fib_rules_ops *, u32 pref, u32 table,