1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
|
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __NET_FIB_RULES_H
#define __NET_FIB_RULES_H
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/netdevice.h>
#include <linux/fib_rules.h>
#include <linux/refcount.h>
#include <net/flow.h>
#include <net/rtnetlink.h>
#include <net/fib_notifier.h>
#include <linux/indirect_call_wrapper.h>
struct fib_kuid_range {
kuid_t start;
kuid_t end;
};
struct fib_rule {
struct list_head list;
int iifindex;
int oifindex;
u32 mark;
u32 mark_mask;
u32 flags;
u32 table;
u8 action;
u8 l3mdev;
u8 proto;
u8 ip_proto;
u32 target;
__be64 tun_id;
struct fib_rule __rcu *ctarget;
struct net *fr_net;
refcount_t refcnt;
u32 pref;
int suppress_ifgroup;
int suppress_prefixlen;
char iifname[IFNAMSIZ];
char oifname[IFNAMSIZ];
struct fib_kuid_range uid_range;
struct fib_rule_port_range sport_range;
struct fib_rule_port_range dport_range;
struct rcu_head rcu;
};
struct fib_lookup_arg {
void *lookup_ptr;
const void *lookup_data;
void *result;
struct fib_rule *rule;
u32 table;
int flags;
#define FIB_LOOKUP_NOREF 1
#define FIB_LOOKUP_IGNORE_LINKSTATE 2
};
struct fib_rules_ops {
int family;
struct list_head list;
int rule_size;
int addr_size;
int unresolved_rules;
int nr_goto_rules;
unsigned int fib_rules_seq;
int (*action)(struct fib_rule *,
struct flowi *, int,
struct fib_lookup_arg *);
bool (*suppress)(struct fib_rule *, int,
struct fib_lookup_arg *);
int (*match)(struct fib_rule *,
struct flowi *, int);
int (*configure)(struct fib_rule *,
struct sk_buff *,
struct fib_rule_hdr *,
struct nlattr **,
struct netlink_ext_ack *);
int (*delete)(struct fib_rule *);
int (*compare)(struct fib_rule *,
struct fib_rule_hdr *,
struct nlattr **);
int (*fill)(struct fib_rule *, struct sk_buff *,
struct fib_rule_hdr *);
size_t (*nlmsg_payload)(struct fib_rule *);
/* Called after modifications to the rules set, must flush
* the route cache if one exists. */
void (*flush_cache)(struct fib_rules_ops *ops);
int nlgroup;
struct list_head rules_list;
struct module *owner;
struct net *fro_net;
struct rcu_head rcu;
};
struct fib_rule_notifier_info {
struct fib_notifier_info info; /* must be first */
struct fib_rule *rule;
};
static inline void fib_rule_get(struct fib_rule *rule)
{
refcount_inc(&rule->refcnt);
}
static inline void fib_rule_put(struct fib_rule *rule)
{
if (refcount_dec_and_test(&rule->refcnt))
kfree_rcu(rule, rcu);
}
#ifdef CONFIG_NET_L3_MASTER_DEV
static inline u32 fib_rule_get_table(struct fib_rule *rule,
struct fib_lookup_arg *arg)
{
return rule->l3mdev ? arg->table : rule->table;
}
#else
static inline u32 fib_rule_get_table(struct fib_rule *rule,
struct fib_lookup_arg *arg)
{
return rule->table;
}
#endif
static inline u32 frh_get_table(struct fib_rule_hdr *frh, struct nlattr **nla)
{
if (nla[FRA_TABLE])
return nla_get_u32(nla[FRA_TABLE]);
return frh->table;
}
static inline bool fib_rule_port_range_set(const struct fib_rule_port_range *range)
{
return range->start != 0 && range->end != 0;
}
static inline bool fib_rule_port_inrange(const struct fib_rule_port_range *a,
__be16 port)
{
return ntohs(port) >= a->start &&
ntohs(port) <= a->end;
}
static inline bool fib_rule_port_range_valid(const struct fib_rule_port_range *a)
{
return a->start != 0 && a->end != 0 && a->end < 0xffff &&
a->start <= a->end;
}
static inline bool fib_rule_port_range_compare(struct fib_rule_port_range *a,
struct fib_rule_port_range *b)
{
return a->start == b->start &&
a->end == b->end;
}
static inline bool fib_rule_requires_fldissect(struct fib_rule *rule)
{
return rule->iifindex != LOOPBACK_IFINDEX && (rule->ip_proto ||
fib_rule_port_range_set(&rule->sport_range) ||
fib_rule_port_range_set(&rule->dport_range));
}
struct fib_rules_ops *fib_rules_register(const struct fib_rules_ops *,
struct net *);
void fib_rules_unregister(struct fib_rules_ops *);
int fib_rules_lookup(struct fib_rules_ops *, struct flowi *, int flags,
struct fib_lookup_arg *);
int fib_default_rule_add(struct fib_rules_ops *, u32 pref, u32 table);
bool fib_rule_matchall(const struct fib_rule *rule);
int fib_rules_dump(struct net *net, struct notifier_block *nb, int family,
struct netlink_ext_ack *extack);
unsigned int fib_rules_seq_read(struct net *net, int family);
int fib_nl_newrule(struct sk_buff *skb, struct nlmsghdr *nlh,
struct netlink_ext_ack *extack);
int fib_nl_delrule(struct sk_buff *skb, struct nlmsghdr *nlh,
struct netlink_ext_ack *extack);
INDIRECT_CALLABLE_DECLARE(int fib6_rule_match(struct fib_rule *rule,
struct flowi *fl, int flags));
INDIRECT_CALLABLE_DECLARE(int fib4_rule_match(struct fib_rule *rule,
struct flowi *fl, int flags));
INDIRECT_CALLABLE_DECLARE(int fib6_rule_action(struct fib_rule *rule,
struct flowi *flp, int flags,
struct fib_lookup_arg *arg));
INDIRECT_CALLABLE_DECLARE(int fib4_rule_action(struct fib_rule *rule,
struct flowi *flp, int flags,
struct fib_lookup_arg *arg));
INDIRECT_CALLABLE_DECLARE(bool fib6_rule_suppress(struct fib_rule *rule,
int flags,
struct fib_lookup_arg *arg));
INDIRECT_CALLABLE_DECLARE(bool fib4_rule_suppress(struct fib_rule *rule,
int flags,
struct fib_lookup_arg *arg));
#endif
|
