Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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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/slab.h>
6#include <linux/netdevice.h>
7#include <linux/fib_rules.h>
8#include <net/flow.h>
9#include <net/rtnetlink.h>
10
11struct fib_rule {
12 struct list_head list;
13 atomic_t refcnt;
14 int iifindex;
15 int oifindex;
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 __rcu *ctarget;
24 char iifname[IFNAMSIZ];
25 char oifname[IFNAMSIZ];
26 struct rcu_head rcu;
27 struct net * fr_net;
28};
29
30struct fib_lookup_arg {
31 void *lookup_ptr;
32 void *result;
33 struct fib_rule *rule;
34 int flags;
35#define FIB_LOOKUP_NOREF 1
36};
37
38struct fib_rules_ops {
39 int family;
40 struct list_head list;
41 int rule_size;
42 int addr_size;
43 int unresolved_rules;
44 int nr_goto_rules;
45
46 int (*action)(struct fib_rule *,
47 struct flowi *, int,
48 struct fib_lookup_arg *);
49 int (*match)(struct fib_rule *,
50 struct flowi *, int);
51 int (*configure)(struct fib_rule *,
52 struct sk_buff *,
53 struct fib_rule_hdr *,
54 struct nlattr **);
55 void (*delete)(struct fib_rule *);
56 int (*compare)(struct fib_rule *,
57 struct fib_rule_hdr *,
58 struct nlattr **);
59 int (*fill)(struct fib_rule *, struct sk_buff *,
60 struct fib_rule_hdr *);
61 u32 (*default_pref)(struct fib_rules_ops *ops);
62 size_t (*nlmsg_payload)(struct fib_rule *);
63
64 /* Called after modifications to the rules set, must flush
65 * the route cache if one exists. */
66 void (*flush_cache)(struct fib_rules_ops *ops);
67
68 int nlgroup;
69 const struct nla_policy *policy;
70 struct list_head rules_list;
71 struct module *owner;
72 struct net *fro_net;
73 struct rcu_head rcu;
74};
75
76#define FRA_GENERIC_POLICY \
77 [FRA_IIFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, \
78 [FRA_OIFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, \
79 [FRA_PRIORITY] = { .type = NLA_U32 }, \
80 [FRA_FWMARK] = { .type = NLA_U32 }, \
81 [FRA_FWMASK] = { .type = NLA_U32 }, \
82 [FRA_TABLE] = { .type = NLA_U32 }, \
83 [FRA_GOTO] = { .type = NLA_U32 }
84
85static inline void fib_rule_get(struct fib_rule *rule)
86{
87 atomic_inc(&rule->refcnt);
88}
89
90static inline void fib_rule_put_rcu(struct rcu_head *head)
91{
92 struct fib_rule *rule = container_of(head, struct fib_rule, rcu);
93 release_net(rule->fr_net);
94 kfree(rule);
95}
96
97static inline void fib_rule_put(struct fib_rule *rule)
98{
99 if (atomic_dec_and_test(&rule->refcnt))
100 call_rcu(&rule->rcu, fib_rule_put_rcu);
101}
102
103static inline u32 frh_get_table(struct fib_rule_hdr *frh, struct nlattr **nla)
104{
105 if (nla[FRA_TABLE])
106 return nla_get_u32(nla[FRA_TABLE]);
107 return frh->table;
108}
109
110extern struct fib_rules_ops *fib_rules_register(const struct fib_rules_ops *, struct net *);
111extern void fib_rules_unregister(struct fib_rules_ops *);
112
113extern int fib_rules_lookup(struct fib_rules_ops *,
114 struct flowi *, int flags,
115 struct fib_lookup_arg *);
116extern int fib_default_rule_add(struct fib_rules_ops *,
117 u32 pref, u32 table,
118 u32 flags);
119extern u32 fib_default_rule_pref(struct fib_rules_ops *ops);
120#endif