summaryrefslogtreecommitdiff
path: root/net/tipc/netlink.c
blob: 56935df2167aee189b8aaa1a8b5e8ec7fd29ddae (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
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
/*
 * net/tipc/netlink.c: TIPC configuration handling
 *
 * Copyright (c) 2005-2006, 2014, Ericsson AB
 * Copyright (c) 2005-2007, Wind River Systems
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the names of the copyright holders nor the names of its
 *    contributors may be used to endorse or promote products derived from
 *    this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include "core.h"
#include "socket.h"
#include "name_table.h"
#include "bearer.h"
#include "link.h"
#include "node.h"
#include "net.h"
#include <net/genetlink.h>

static const struct nla_policy tipc_nl_policy[TIPC_NLA_MAX + 1] = {
	[TIPC_NLA_UNSPEC]	= { .type = NLA_UNSPEC, },
	[TIPC_NLA_BEARER]	= { .type = NLA_NESTED, },
	[TIPC_NLA_SOCK]		= { .type = NLA_NESTED, },
	[TIPC_NLA_PUBL]		= { .type = NLA_NESTED, },
	[TIPC_NLA_LINK]		= { .type = NLA_NESTED, },
	[TIPC_NLA_MEDIA]	= { .type = NLA_NESTED, },
	[TIPC_NLA_NODE]		= { .type = NLA_NESTED, },
	[TIPC_NLA_NET]		= { .type = NLA_NESTED, },
	[TIPC_NLA_NAME_TABLE]	= { .type = NLA_NESTED, }
};

const struct nla_policy
tipc_nl_name_table_policy[TIPC_NLA_NAME_TABLE_MAX + 1] = {
	[TIPC_NLA_NAME_TABLE_UNSPEC]	= { .type = NLA_UNSPEC },
	[TIPC_NLA_NAME_TABLE_PUBL]	= { .type = NLA_NESTED }
};

const struct nla_policy tipc_nl_sock_policy[TIPC_NLA_SOCK_MAX + 1] = {
	[TIPC_NLA_SOCK_UNSPEC]		= { .type = NLA_UNSPEC },
	[TIPC_NLA_SOCK_ADDR]		= { .type = NLA_U32 },
	[TIPC_NLA_SOCK_REF]		= { .type = NLA_U32 },
	[TIPC_NLA_SOCK_CON]		= { .type = NLA_NESTED },
	[TIPC_NLA_SOCK_HAS_PUBL]	= { .type = NLA_FLAG }
};

const struct nla_policy tipc_nl_net_policy[TIPC_NLA_NET_MAX + 1] = {
	[TIPC_NLA_NET_UNSPEC]		= { .type = NLA_UNSPEC },
	[TIPC_NLA_NET_ID]		= { .type = NLA_U32 }
};

const struct nla_policy tipc_nl_link_policy[TIPC_NLA_LINK_MAX + 1] = {
	[TIPC_NLA_LINK_UNSPEC]		= { .type = NLA_UNSPEC },
	[TIPC_NLA_LINK_NAME]		= { .type = NLA_STRING,
					    .len = TIPC_MAX_LINK_NAME },
	[TIPC_NLA_LINK_MTU]		= { .type = NLA_U32 },
	[TIPC_NLA_LINK_BROADCAST]	= { .type = NLA_FLAG },
	[TIPC_NLA_LINK_UP]		= { .type = NLA_FLAG },
	[TIPC_NLA_LINK_ACTIVE]		= { .type = NLA_FLAG },
	[TIPC_NLA_LINK_PROP]		= { .type = NLA_NESTED },
	[TIPC_NLA_LINK_STATS]		= { .type = NLA_NESTED },
	[TIPC_NLA_LINK_RX]		= { .type = NLA_U32 },
	[TIPC_NLA_LINK_TX]		= { .type = NLA_U32 }
};

const struct nla_policy tipc_nl_node_policy[TIPC_NLA_NODE_MAX + 1] = {
	[TIPC_NLA_NODE_UNSPEC]		= { .type = NLA_UNSPEC },
	[TIPC_NLA_NODE_ADDR]		= { .type = NLA_U32 },
	[TIPC_NLA_NODE_UP]		= { .type = NLA_FLAG }
};

/* Properties valid for media, bearer and link */
const struct nla_policy tipc_nl_prop_policy[TIPC_NLA_PROP_MAX + 1] = {
	[TIPC_NLA_PROP_UNSPEC]		= { .type = NLA_UNSPEC },
	[TIPC_NLA_PROP_PRIO]		= { .type = NLA_U32 },
	[TIPC_NLA_PROP_TOL]		= { .type = NLA_U32 },
	[TIPC_NLA_PROP_WIN]		= { .type = NLA_U32 }
};

const struct nla_policy tipc_nl_bearer_policy[TIPC_NLA_BEARER_MAX + 1]	= {
	[TIPC_NLA_BEARER_UNSPEC]	= { .type = NLA_UNSPEC },
	[TIPC_NLA_BEARER_NAME]		= { .type = NLA_STRING,
					    .len = TIPC_MAX_BEARER_NAME },
	[TIPC_NLA_BEARER_PROP]		= { .type = NLA_NESTED },
	[TIPC_NLA_BEARER_DOMAIN]	= { .type = NLA_U32 }
};

const struct nla_policy tipc_nl_media_policy[TIPC_NLA_MEDIA_MAX + 1] = {
	[TIPC_NLA_MEDIA_UNSPEC]		= { .type = NLA_UNSPEC },
	[TIPC_NLA_MEDIA_NAME]		= { .type = NLA_STRING },
	[TIPC_NLA_MEDIA_PROP]		= { .type = NLA_NESTED }
};

const struct nla_policy tipc_nl_udp_policy[TIPC_NLA_UDP_MAX + 1] = {
	[TIPC_NLA_UDP_UNSPEC]	= {.type = NLA_UNSPEC},
	[TIPC_NLA_UDP_LOCAL]	= {.type = NLA_BINARY,
				   .len = sizeof(struct sockaddr_storage)},
	[TIPC_NLA_UDP_REMOTE]	= {.type = NLA_BINARY,
				   .len = sizeof(struct sockaddr_storage)},
};

/* Users of the legacy API (tipc-config) can't handle that we add operations,
 * so we have a separate genl handling for the new API.
 */
struct genl_family tipc_genl_family = {
	.id		= GENL_ID_GENERATE,
	.name		= TIPC_GENL_V2_NAME,
	.version	= TIPC_GENL_V2_VERSION,
	.hdrsize	= 0,
	.maxattr	= TIPC_NLA_MAX,
	.netnsok	= true,
};

static const struct genl_ops tipc_genl_v2_ops[] = {
	{
		.cmd	= TIPC_NL_BEARER_DISABLE,
		.doit	= tipc_nl_bearer_disable,
		.policy = tipc_nl_policy,
	},
	{
		.cmd	= TIPC_NL_BEARER_ENABLE,
		.doit	= tipc_nl_bearer_enable,
		.policy = tipc_nl_policy,
	},
	{
		.cmd	= TIPC_NL_BEARER_GET,
		.doit	= tipc_nl_bearer_get,
		.dumpit	= tipc_nl_bearer_dump,
		.policy = tipc_nl_policy,
	},
	{
		.cmd	= TIPC_NL_BEARER_SET,
		.doit	= tipc_nl_bearer_set,
		.policy = tipc_nl_policy,
	},
	{
		.cmd	= TIPC_NL_SOCK_GET,
		.dumpit	= tipc_nl_sk_dump,
		.policy = tipc_nl_policy,
	},
	{
		.cmd	= TIPC_NL_PUBL_GET,
		.dumpit	= tipc_nl_publ_dump,
		.policy = tipc_nl_policy,
	},
	{
		.cmd	= TIPC_NL_LINK_GET,
		.doit   = tipc_nl_node_get_link,
		.dumpit	= tipc_nl_node_dump_link,
		.policy = tipc_nl_policy,
	},
	{
		.cmd	= TIPC_NL_LINK_SET,
		.doit	= tipc_nl_node_set_link,
		.policy = tipc_nl_policy,
	},
	{
		.cmd	= TIPC_NL_LINK_RESET_STATS,
		.doit   = tipc_nl_node_reset_link_stats,
		.policy = tipc_nl_policy,
	},
	{
		.cmd	= TIPC_NL_MEDIA_GET,
		.doit	= tipc_nl_media_get,
		.dumpit	= tipc_nl_media_dump,
		.policy = tipc_nl_policy,
	},
	{
		.cmd	= TIPC_NL_MEDIA_SET,
		.doit	= tipc_nl_media_set,
		.policy = tipc_nl_policy,
	},
	{
		.cmd	= TIPC_NL_NODE_GET,
		.dumpit	= tipc_nl_node_dump,
		.policy = tipc_nl_policy,
	},
	{
		.cmd	= TIPC_NL_NET_GET,
		.dumpit	= tipc_nl_net_dump,
		.policy = tipc_nl_policy,
	},
	{
		.cmd	= TIPC_NL_NET_SET,
		.doit	= tipc_nl_net_set,
		.policy = tipc_nl_policy,
	},
	{
		.cmd	= TIPC_NL_NAME_TABLE_GET,
		.dumpit	= tipc_nl_name_table_dump,
		.policy = tipc_nl_policy,
	}
};

int tipc_nlmsg_parse(const struct nlmsghdr *nlh, struct nlattr ***attr)
{
	u32 maxattr = tipc_genl_family.maxattr;

	*attr = tipc_genl_family.attrbuf;
	if (!*attr)
		return -EOPNOTSUPP;

	return nlmsg_parse(nlh, GENL_HDRLEN, *attr, maxattr, tipc_nl_policy);
}

int tipc_netlink_start(void)
{
	int res;

	res = genl_register_family_with_ops(&tipc_genl_family,
					    tipc_genl_v2_ops);
	if (res) {
		pr_err("Failed to register netlink interface\n");
		return res;
	}
	return 0;
}

void tipc_netlink_stop(void)
{
	genl_unregister_family(&tipc_genl_family);
}