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14c0b97d TG |
1 | #ifndef __NET_FIB_RULES_H |
2 | #define __NET_FIB_RULES_H | |
3 | ||
4 | #include <linux/types.h> | |
5 | #include <linux/netdevice.h> | |
6 | #include <linux/fib_rules.h> | |
7 | #include <net/flow.h> | |
8 | #include <net/netlink.h> | |
9 | ||
10 | struct fib_rule | |
11 | { | |
12 | struct list_head list; | |
13 | atomic_t refcnt; | |
14 | int ifindex; | |
15 | char ifname[IFNAMSIZ]; | |
b8964ed9 TG |
16 | u32 mark; |
17 | u32 mark_mask; | |
14c0b97d TG |
18 | u32 pref; |
19 | u32 flags; | |
20 | u32 table; | |
21 | u8 action; | |
22 | struct rcu_head rcu; | |
23 | }; | |
24 | ||
25 | struct fib_lookup_arg | |
26 | { | |
27 | void *lookup_ptr; | |
28 | void *result; | |
29 | struct fib_rule *rule; | |
30 | }; | |
31 | ||
32 | struct fib_rules_ops | |
33 | { | |
34 | int family; | |
35 | struct list_head list; | |
36 | int rule_size; | |
e1701c68 | 37 | int addr_size; |
14c0b97d TG |
38 | |
39 | int (*action)(struct fib_rule *, | |
40 | struct flowi *, int, | |
41 | struct fib_lookup_arg *); | |
42 | int (*match)(struct fib_rule *, | |
43 | struct flowi *, int); | |
44 | int (*configure)(struct fib_rule *, | |
45 | struct sk_buff *, | |
46 | struct nlmsghdr *, | |
47 | struct fib_rule_hdr *, | |
48 | struct nlattr **); | |
49 | int (*compare)(struct fib_rule *, | |
50 | struct fib_rule_hdr *, | |
51 | struct nlattr **); | |
52 | int (*fill)(struct fib_rule *, struct sk_buff *, | |
53 | struct nlmsghdr *, | |
54 | struct fib_rule_hdr *); | |
55 | u32 (*default_pref)(void); | |
339bf98f | 56 | size_t (*nlmsg_payload)(struct fib_rule *); |
14c0b97d TG |
57 | |
58 | int nlgroup; | |
59 | struct nla_policy *policy; | |
60 | struct list_head *rules_list; | |
61 | struct module *owner; | |
62 | }; | |
63 | ||
1f6c9557 TG |
64 | #define FRA_GENERIC_POLICY \ |
65 | [FRA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, \ | |
66 | [FRA_PRIORITY] = { .type = NLA_U32 }, \ | |
67 | [FRA_FWMARK] = { .type = NLA_U32 }, \ | |
68 | [FRA_FWMASK] = { .type = NLA_U32 }, \ | |
69 | [FRA_TABLE] = { .type = NLA_U32 } | |
70 | ||
14c0b97d TG |
71 | static inline void fib_rule_get(struct fib_rule *rule) |
72 | { | |
73 | atomic_inc(&rule->refcnt); | |
74 | } | |
75 | ||
76 | static inline void fib_rule_put_rcu(struct rcu_head *head) | |
77 | { | |
78 | struct fib_rule *rule = container_of(head, struct fib_rule, rcu); | |
79 | kfree(rule); | |
80 | } | |
81 | ||
82 | static inline void fib_rule_put(struct fib_rule *rule) | |
83 | { | |
84 | if (atomic_dec_and_test(&rule->refcnt)) | |
85 | call_rcu(&rule->rcu, fib_rule_put_rcu); | |
86 | } | |
87 | ||
9e762a4a PM |
88 | static inline u32 frh_get_table(struct fib_rule_hdr *frh, struct nlattr **nla) |
89 | { | |
90 | if (nla[FRA_TABLE]) | |
91 | return nla_get_u32(nla[FRA_TABLE]); | |
92 | return frh->table; | |
93 | } | |
94 | ||
14c0b97d TG |
95 | extern int fib_rules_register(struct fib_rules_ops *); |
96 | extern int fib_rules_unregister(struct fib_rules_ops *); | |
97 | ||
98 | extern int fib_rules_lookup(struct fib_rules_ops *, | |
99 | struct flowi *, int flags, | |
100 | struct fib_lookup_arg *); | |
101 | ||
102 | extern int fib_nl_newrule(struct sk_buff *, | |
103 | struct nlmsghdr *, void *); | |
104 | extern int fib_nl_delrule(struct sk_buff *, | |
105 | struct nlmsghdr *, void *); | |
106 | extern int fib_rules_dump(struct sk_buff *, | |
107 | struct netlink_callback *, int); | |
108 | #endif |