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