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>
11 struct fib_kuid_range {
17 struct list_head list;
26 /* 2 bytes hole, try to use */
29 struct fib_rule __rcu *ctarget;
35 int suppress_prefixlen;
36 char iifname[IFNAMSIZ];
37 char oifname[IFNAMSIZ];
38 struct fib_kuid_range uid_range;
42 struct fib_lookup_arg {
45 struct fib_rule *rule;
48 #define FIB_LOOKUP_NOREF 1
49 #define FIB_LOOKUP_IGNORE_LINKSTATE 2
52 struct fib_rules_ops {
54 struct list_head list;
60 int (*action)(struct fib_rule *,
62 struct fib_lookup_arg *);
63 bool (*suppress)(struct fib_rule *,
64 struct fib_lookup_arg *);
65 int (*match)(struct fib_rule *,
67 int (*configure)(struct fib_rule *,
69 struct fib_rule_hdr *,
71 int (*delete)(struct fib_rule *);
72 int (*compare)(struct fib_rule *,
73 struct fib_rule_hdr *,
75 int (*fill)(struct fib_rule *, struct sk_buff *,
76 struct fib_rule_hdr *);
77 size_t (*nlmsg_payload)(struct fib_rule *);
79 /* Called after modifications to the rules set, must flush
80 * the route cache if one exists. */
81 void (*flush_cache)(struct fib_rules_ops *ops);
84 const struct nla_policy *policy;
85 struct list_head rules_list;
91 #define FRA_GENERIC_POLICY \
92 [FRA_IIFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, \
93 [FRA_OIFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, \
94 [FRA_PRIORITY] = { .type = NLA_U32 }, \
95 [FRA_FWMARK] = { .type = NLA_U32 }, \
96 [FRA_FWMASK] = { .type = NLA_U32 }, \
97 [FRA_TABLE] = { .type = NLA_U32 }, \
98 [FRA_SUPPRESS_PREFIXLEN] = { .type = NLA_U32 }, \
99 [FRA_SUPPRESS_IFGROUP] = { .type = NLA_U32 }, \
100 [FRA_GOTO] = { .type = NLA_U32 }, \
101 [FRA_L3MDEV] = { .type = NLA_U8 }, \
102 [FRA_UID_RANGE] = { .len = sizeof(struct fib_rule_uid_range) }
104 static inline void fib_rule_get(struct fib_rule *rule)
106 atomic_inc(&rule->refcnt);
109 static inline void fib_rule_put(struct fib_rule *rule)
111 if (atomic_dec_and_test(&rule->refcnt))
112 kfree_rcu(rule, rcu);
115 #ifdef CONFIG_NET_L3_MASTER_DEV
116 static inline u32 fib_rule_get_table(struct fib_rule *rule,
117 struct fib_lookup_arg *arg)
119 return rule->l3mdev ? arg->table : rule->table;
122 static inline u32 fib_rule_get_table(struct fib_rule *rule,
123 struct fib_lookup_arg *arg)
129 static inline u32 frh_get_table(struct fib_rule_hdr *frh, struct nlattr **nla)
132 return nla_get_u32(nla[FRA_TABLE]);
136 struct fib_rules_ops *fib_rules_register(const struct fib_rules_ops *,
138 void fib_rules_unregister(struct fib_rules_ops *);
140 int fib_rules_lookup(struct fib_rules_ops *, struct flowi *, int flags,
141 struct fib_lookup_arg *);
142 int fib_default_rule_add(struct fib_rules_ops *, u32 pref, u32 table,
144 bool fib_rule_matchall(const struct fib_rule *rule);
146 int fib_nl_newrule(struct sk_buff *skb, struct nlmsghdr *nlh,
147 struct netlink_ext_ack *extack);
148 int fib_nl_delrule(struct sk_buff *skb, struct nlmsghdr *nlh,
149 struct netlink_ext_ack *extack);