summaryrefslogtreecommitdiff
path: root/include/net/vrf.h
blob: 5bfb16237fd772cd83c80f4a867c7c4cb5af3bb9 (plain)
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
/*
 * include/net/net_vrf.h - adds vrf dev structure definitions
 * Copyright (c) 2015 Cumulus Networks
 *
 * 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 __LINUX_NET_VRF_H
#define __LINUX_NET_VRF_H

struct net_vrf_dev {
	struct rcu_head		rcu;
	int                     ifindex; /* ifindex of master dev */
	u32                     tb_id;   /* table id for VRF */
};

struct slave {
	struct list_head	list;
	struct net_device	*dev;
};

struct slave_queue {
	struct list_head	all_slaves;
};

struct net_vrf {
	struct slave_queue	queue;
	struct rtable           *rth;
	u32			tb_id;
};


#if IS_ENABLED(CONFIG_NET_VRF)
/* called with rcu_read_lock() */
static inline int vrf_master_ifindex_rcu(const struct net_device *dev)
{
	struct net_vrf_dev *vrf_ptr;
	int ifindex = 0;

	if (!dev)
		return 0;

	if (netif_is_vrf(dev)) {
		ifindex = dev->ifindex;
	} else {
		vrf_ptr = rcu_dereference(dev->vrf_ptr);
		if (vrf_ptr)
			ifindex = vrf_ptr->ifindex;
	}

	return ifindex;
}

static inline int vrf_master_ifindex(const struct net_device *dev)
{
	int ifindex;

	rcu_read_lock();
	ifindex = vrf_master_ifindex_rcu(dev);
	rcu_read_unlock();

	return ifindex;
}

/* called with rcu_read_lock */
static inline int vrf_dev_table_rcu(const struct net_device *dev)
{
	int tb_id = 0;

	if (dev) {
		struct net_vrf_dev *vrf_ptr;

		vrf_ptr = rcu_dereference(dev->vrf_ptr);
		if (vrf_ptr)
			tb_id = vrf_ptr->tb_id;
	}
	return tb_id;
}

static inline int vrf_dev_table(const struct net_device *dev)
{
	int tb_id;

	rcu_read_lock();
	tb_id = vrf_dev_table_rcu(dev);
	rcu_read_unlock();

	return tb_id;
}

static inline int vrf_dev_table_ifindex(struct net *net, int ifindex)
{
	struct net_device *dev;
	int tb_id = 0;

	if (!ifindex)
		return 0;

	rcu_read_lock();

	dev = dev_get_by_index_rcu(net, ifindex);
	if (dev)
		tb_id = vrf_dev_table_rcu(dev);

	rcu_read_unlock();

	return tb_id;
}

/* called with rtnl */
static inline int vrf_dev_table_rtnl(const struct net_device *dev)
{
	int tb_id = 0;

	if (dev) {
		struct net_vrf_dev *vrf_ptr;

		vrf_ptr = rtnl_dereference(dev->vrf_ptr);
		if (vrf_ptr)
			tb_id = vrf_ptr->tb_id;
	}
	return tb_id;
}

/* caller has already checked netif_is_vrf(dev) */
static inline struct rtable *vrf_dev_get_rth(const struct net_device *dev)
{
	struct rtable *rth = ERR_PTR(-ENETUNREACH);
	struct net_vrf *vrf = netdev_priv(dev);

	if (vrf) {
		rth = vrf->rth;
		atomic_inc(&rth->dst.__refcnt);
	}
	return rth;
}

#else
static inline int vrf_master_ifindex_rcu(const struct net_device *dev)
{
	return 0;
}

static inline int vrf_master_ifindex(const struct net_device *dev)
{
	return 0;
}

static inline int vrf_dev_table_rcu(const struct net_device *dev)
{
	return 0;
}

static inline int vrf_dev_table(const struct net_device *dev)
{
	return 0;
}

static inline int vrf_dev_table_ifindex(struct net *net, int ifindex)
{
	return 0;
}

static inline int vrf_dev_table_rtnl(const struct net_device *dev)
{
	return 0;
}

static inline struct rtable *vrf_dev_get_rth(const struct net_device *dev)
{
	return ERR_PTR(-ENETUNREACH);
}
#endif

#endif /* __LINUX_NET_VRF_H */