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Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
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/rtnetlink.h>
9
10struct fib_rule
11{
12 struct list_head list;
13 atomic_t refcnt;
14 int ifindex;
15 char ifname[IFNAMSIZ];
16 u32 mark;
17 u32 mark_mask;
18 u32 pref;
19 u32 flags;
20 u32 table;
21 u8 action;
22 u32 target;
23 struct fib_rule * ctarget;
24 struct rcu_head rcu;
25 struct net * fr_net;
26};
27
28struct fib_lookup_arg
29{
30 void *lookup_ptr;
31 void *result;
32 struct fib_rule *rule;
33};
34
35struct fib_rules_ops
36{
37 int family;
38 struct list_head list;
39 int rule_size;
40 int addr_size;
41 int unresolved_rules;
42 int nr_goto_rules;
43
44 int (*action)(struct fib_rule *,
45 struct flowi *, int,
46 struct fib_lookup_arg *);
47 int (*match)(struct fib_rule *,
48 struct flowi *, int);
49 int (*configure)(struct fib_rule *,
50 struct sk_buff *,
51 struct nlmsghdr *,
52 struct fib_rule_hdr *,
53 struct nlattr **);
54 int (*compare)(struct fib_rule *,
55 struct fib_rule_hdr *,
56 struct nlattr **);
57 int (*fill)(struct fib_rule *, struct sk_buff *,
58 struct nlmsghdr *,
59 struct fib_rule_hdr *);
60 u32 (*default_pref)(struct fib_rules_ops *ops);
61 size_t (*nlmsg_payload)(struct fib_rule *);
62
63 /* Called after modifications to the rules set, must flush
64 * the route cache if one exists. */
65 void (*flush_cache)(struct fib_rules_ops *ops);
66
67 int nlgroup;
68 const struct nla_policy *policy;
69 struct list_head rules_list;
70 struct module *owner;
71 struct net *fro_net;
72};
73
74#define FRA_GENERIC_POLICY \
75 [FRA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, \
76 [FRA_PRIORITY] = { .type = NLA_U32 }, \
77 [FRA_FWMARK] = { .type = NLA_U32 }, \
78 [FRA_FWMASK] = { .type = NLA_U32 }, \
79 [FRA_TABLE] = { .type = NLA_U32 }, \
80 [FRA_GOTO] = { .type = NLA_U32 }
81
82static inline void fib_rule_get(struct fib_rule *rule)
83{
84 atomic_inc(&rule->refcnt);
85}
86
87static inline void fib_rule_put_rcu(struct rcu_head *head)
88{
89 struct fib_rule *rule = container_of(head, struct fib_rule, rcu);
90 release_net(rule->fr_net);
91 kfree(rule);
92}
93
94static inline void fib_rule_put(struct fib_rule *rule)
95{
96 if (atomic_dec_and_test(&rule->refcnt))
97 call_rcu(&rule->rcu, fib_rule_put_rcu);
98}
99
100static inline u32 frh_get_table(struct fib_rule_hdr *frh, struct nlattr **nla)
101{
102 if (nla[FRA_TABLE])
103 return nla_get_u32(nla[FRA_TABLE]);
104 return frh->table;
105}
106
107extern int fib_rules_register(struct fib_rules_ops *);
108extern void fib_rules_unregister(struct fib_rules_ops *);
109extern void fib_rules_cleanup_ops(struct fib_rules_ops *);
110
111extern int fib_rules_lookup(struct fib_rules_ops *,
112 struct flowi *, int flags,
113 struct fib_lookup_arg *);
114extern int fib_default_rule_add(struct fib_rules_ops *,
115 u32 pref, u32 table,
116 u32 flags);
117#endif