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>
8 #include <linux/refcount.h>
10 #include <net/rtnetlink.h>
12 struct fib_kuid_range {
18 struct list_head list;
27 /* 2 bytes hole, try to use */
30 struct fib_rule __rcu *ctarget;
36 int suppress_prefixlen;
37 char iifname[IFNAMSIZ];
38 char oifname[IFNAMSIZ];
39 struct fib_kuid_range uid_range;
43 struct fib_lookup_arg {
46 struct fib_rule *rule;
49 #define FIB_LOOKUP_NOREF 1
50 #define FIB_LOOKUP_IGNORE_LINKSTATE 2
53 struct fib_rules_ops {
55 struct list_head list;
61 int (*action)(struct fib_rule *,
63 struct fib_lookup_arg *);
64 bool (*suppress)(struct fib_rule *,
65 struct fib_lookup_arg *);
66 int (*match)(struct fib_rule *,
68 int (*configure)(struct fib_rule *,
70 struct fib_rule_hdr *,
72 int (*delete)(struct fib_rule *);
73 int (*compare)(struct fib_rule *,
74 struct fib_rule_hdr *,
76 int (*fill)(struct fib_rule *, struct sk_buff *,
77 struct fib_rule_hdr *);
78 size_t (*nlmsg_payload)(struct fib_rule *);
80 /* Called after modifications to the rules set, must flush
81 * the route cache if one exists. */
82 void (*flush_cache)(struct fib_rules_ops *ops);
85 const struct nla_policy *policy;
86 struct list_head rules_list;
92 #define FRA_GENERIC_POLICY \
93 [FRA_IIFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, \
94 [FRA_OIFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, \
95 [FRA_PRIORITY] = { .type = NLA_U32 }, \
96 [FRA_FWMARK] = { .type = NLA_U32 }, \
97 [FRA_FWMASK] = { .type = NLA_U32 }, \
98 [FRA_TABLE] = { .type = NLA_U32 }, \
99 [FRA_SUPPRESS_PREFIXLEN] = { .type = NLA_U32 }, \
100 [FRA_SUPPRESS_IFGROUP] = { .type = NLA_U32 }, \
101 [FRA_GOTO] = { .type = NLA_U32 }, \
102 [FRA_L3MDEV] = { .type = NLA_U8 }, \
103 [FRA_UID_RANGE] = { .len = sizeof(struct fib_rule_uid_range) }
105 static inline void fib_rule_get(struct fib_rule *rule)
107 refcount_inc(&rule->refcnt);
110 static inline void fib_rule_put(struct fib_rule *rule)
112 if (refcount_dec_and_test(&rule->refcnt))
113 kfree_rcu(rule, rcu);
116 #ifdef CONFIG_NET_L3_MASTER_DEV
117 static inline u32 fib_rule_get_table(struct fib_rule *rule,
118 struct fib_lookup_arg *arg)
120 return rule->l3mdev ? arg->table : rule->table;
123 static inline u32 fib_rule_get_table(struct fib_rule *rule,
124 struct fib_lookup_arg *arg)
130 static inline u32 frh_get_table(struct fib_rule_hdr *frh, struct nlattr **nla)
133 return nla_get_u32(nla[FRA_TABLE]);
137 struct fib_rules_ops *fib_rules_register(const struct fib_rules_ops *,
139 void fib_rules_unregister(struct fib_rules_ops *);
141 int fib_rules_lookup(struct fib_rules_ops *, struct flowi *, int flags,
142 struct fib_lookup_arg *);
143 int fib_default_rule_add(struct fib_rules_ops *, u32 pref, u32 table,
145 bool fib_rule_matchall(const struct fib_rule *rule);
147 int fib_nl_newrule(struct sk_buff *skb, struct nlmsghdr *nlh,
148 struct netlink_ext_ack *extack);
149 int fib_nl_delrule(struct sk_buff *skb, struct nlmsghdr *nlh,
150 struct netlink_ext_ack *extack);