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
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
|
/*
* include/net/l3mdev.h - L3 master device API
* Copyright (c) 2015 Cumulus Networks
* Copyright (c) 2015 David Ahern <dsa@cumulusnetworks.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#ifndef _NET_L3MDEV_H_
#define _NET_L3MDEV_H_
#include <net/fib_rules.h>
/**
* struct l3mdev_ops - l3mdev operations
*
* @l3mdev_fib_table: Get FIB table id to use for lookups
*
* @l3mdev_get_rtable: Get cached IPv4 rtable (dst_entry) for device
*
* @l3mdev_get_saddr: Get source address for a flow
*
* @l3mdev_get_rt6_dst: Get cached IPv6 rt6_info (dst_entry) for device
*/
struct l3mdev_ops {
u32 (*l3mdev_fib_table)(const struct net_device *dev);
struct sk_buff * (*l3mdev_l3_rcv)(struct net_device *dev,
struct sk_buff *skb, u16 proto);
/* IPv4 ops */
struct rtable * (*l3mdev_get_rtable)(const struct net_device *dev,
const struct flowi4 *fl4);
int (*l3mdev_get_saddr)(struct net_device *dev,
struct flowi4 *fl4);
/* IPv6 ops */
struct dst_entry * (*l3mdev_get_rt6_dst)(const struct net_device *dev,
const struct flowi6 *fl6);
};
#ifdef CONFIG_NET_L3_MASTER_DEV
int l3mdev_fib_rule_match(struct net *net, struct flowi *fl,
struct fib_lookup_arg *arg);
int l3mdev_master_ifindex_rcu(const struct net_device *dev);
static inline int l3mdev_master_ifindex(struct net_device *dev)
{
int ifindex;
rcu_read_lock();
ifindex = l3mdev_master_ifindex_rcu(dev);
rcu_read_unlock();
return ifindex;
}
static inline int l3mdev_master_ifindex_by_index(struct net *net, int ifindex)
{
struct net_device *dev;
int rc = 0;
if (likely(ifindex)) {
rcu_read_lock();
dev = dev_get_by_index_rcu(net, ifindex);
if (dev)
rc = l3mdev_master_ifindex_rcu(dev);
rcu_read_unlock();
}
return rc;
}
/* get index of an interface to use for FIB lookups. For devices
* enslaved to an L3 master device FIB lookups are based on the
* master index
*/
static inline int l3mdev_fib_oif_rcu(struct net_device *dev)
{
return l3mdev_master_ifindex_rcu(dev) ? : dev->ifindex;
}
static inline int l3mdev_fib_oif(struct net_device *dev)
{
int oif;
rcu_read_lock();
oif = l3mdev_fib_oif_rcu(dev);
rcu_read_unlock();
return oif;
}
u32 l3mdev_fib_table_rcu(const struct net_device *dev);
u32 l3mdev_fib_table_by_index(struct net *net, int ifindex);
static inline u32 l3mdev_fib_table(const struct net_device *dev)
{
u32 tb_id;
rcu_read_lock();
tb_id = l3mdev_fib_table_rcu(dev);
rcu_read_unlock();
return tb_id;
}
static inline struct rtable *l3mdev_get_rtable(const struct net_device *dev,
const struct flowi4 *fl4)
{
if (netif_is_l3_master(dev) && dev->l3mdev_ops->l3mdev_get_rtable)
return dev->l3mdev_ops->l3mdev_get_rtable(dev, fl4);
return NULL;
}
static inline bool netif_index_is_l3_master(struct net *net, int ifindex)
{
struct net_device *dev;
bool rc = false;
if (ifindex == 0)
return false;
rcu_read_lock();
dev = dev_get_by_index_rcu(net, ifindex);
if (dev)
rc = netif_is_l3_master(dev);
rcu_read_unlock();
return rc;
}
int l3mdev_get_saddr(struct net *net, int ifindex, struct flowi4 *fl4);
struct dst_entry *l3mdev_get_rt6_dst(struct net *net, const struct flowi6 *fl6);
static inline
struct sk_buff *l3mdev_l3_rcv(struct sk_buff *skb, u16 proto)
{
struct net_device *master = NULL;
if (netif_is_l3_slave(skb->dev))
master = netdev_master_upper_dev_get_rcu(skb->dev);
else if (netif_is_l3_master(skb->dev))
master = skb->dev;
if (master && master->l3mdev_ops->l3mdev_l3_rcv)
skb = master->l3mdev_ops->l3mdev_l3_rcv(master, skb, proto);
return skb;
}
static inline
struct sk_buff *l3mdev_ip_rcv(struct sk_buff *skb)
{
return l3mdev_l3_rcv(skb, AF_INET);
}
static inline
struct sk_buff *l3mdev_ip6_rcv(struct sk_buff *skb)
{
return l3mdev_l3_rcv(skb, AF_INET6);
}
#else
static inline int l3mdev_master_ifindex_rcu(const struct net_device *dev)
{
return 0;
}
static inline int l3mdev_master_ifindex(struct net_device *dev)
{
return 0;
}
static inline int l3mdev_master_ifindex_by_index(struct net *net, int ifindex)
{
return 0;
}
static inline int l3mdev_fib_oif_rcu(struct net_device *dev)
{
return dev ? dev->ifindex : 0;
}
static inline int l3mdev_fib_oif(struct net_device *dev)
{
return dev ? dev->ifindex : 0;
}
static inline u32 l3mdev_fib_table_rcu(const struct net_device *dev)
{
return 0;
}
static inline u32 l3mdev_fib_table(const struct net_device *dev)
{
return 0;
}
static inline u32 l3mdev_fib_table_by_index(struct net *net, int ifindex)
{
return 0;
}
static inline struct rtable *l3mdev_get_rtable(const struct net_device *dev,
const struct flowi4 *fl4)
{
return NULL;
}
static inline bool netif_index_is_l3_master(struct net *net, int ifindex)
{
return false;
}
static inline int l3mdev_get_saddr(struct net *net, int ifindex,
struct flowi4 *fl4)
{
return 0;
}
static inline
struct dst_entry *l3mdev_get_rt6_dst(struct net *net, const struct flowi6 *fl6)
{
return NULL;
}
static inline
struct sk_buff *l3mdev_ip_rcv(struct sk_buff *skb)
{
return skb;
}
static inline
struct sk_buff *l3mdev_ip6_rcv(struct sk_buff *skb)
{
return skb;
}
static inline
int l3mdev_fib_rule_match(struct net *net, struct flowi *fl,
struct fib_lookup_arg *arg)
{
return 1;
}
#endif
#endif /* _NET_L3MDEV_H_ */
|
