1/*
2 * net/tipc/netlink.c: TIPC configuration handling
3 *
4 * Copyright (c) 2005-2006, 2014, Ericsson AB
5 * Copyright (c) 2005-2007, Wind River Systems
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. Neither the names of the copyright holders nor the names of its
17 *    contributors may be used to endorse or promote products derived from
18 *    this software without specific prior written permission.
19 *
20 * Alternatively, this software may be distributed under the terms of the
21 * GNU General Public License ("GPL") version 2 as published by the Free
22 * Software Foundation.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
28 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
34 * POSSIBILITY OF SUCH DAMAGE.
35 */
36
37#include "core.h"
38#include "socket.h"
39#include "name_table.h"
40#include "bearer.h"
41#include "link.h"
42#include "node.h"
43#include "net.h"
44#include <net/genetlink.h>
45
46static const struct nla_policy tipc_nl_policy[TIPC_NLA_MAX + 1] = {
47	[TIPC_NLA_UNSPEC]	= { .type = NLA_UNSPEC, },
48	[TIPC_NLA_BEARER]	= { .type = NLA_NESTED, },
49	[TIPC_NLA_SOCK]		= { .type = NLA_NESTED, },
50	[TIPC_NLA_PUBL]		= { .type = NLA_NESTED, },
51	[TIPC_NLA_LINK]		= { .type = NLA_NESTED, },
52	[TIPC_NLA_MEDIA]	= { .type = NLA_NESTED, },
53	[TIPC_NLA_NODE]		= { .type = NLA_NESTED, },
54	[TIPC_NLA_NET]		= { .type = NLA_NESTED, },
55	[TIPC_NLA_NAME_TABLE]	= { .type = NLA_NESTED, }
56};
57
58/* Users of the legacy API (tipc-config) can't handle that we add operations,
59 * so we have a separate genl handling for the new API.
60 */
61struct genl_family tipc_genl_family = {
62	.id		= GENL_ID_GENERATE,
63	.name		= TIPC_GENL_V2_NAME,
64	.version	= TIPC_GENL_V2_VERSION,
65	.hdrsize	= 0,
66	.maxattr	= TIPC_NLA_MAX,
67	.netnsok	= true,
68};
69
70static const struct genl_ops tipc_genl_v2_ops[] = {
71	{
72		.cmd	= TIPC_NL_BEARER_DISABLE,
73		.doit	= tipc_nl_bearer_disable,
74		.policy = tipc_nl_policy,
75	},
76	{
77		.cmd	= TIPC_NL_BEARER_ENABLE,
78		.doit	= tipc_nl_bearer_enable,
79		.policy = tipc_nl_policy,
80	},
81	{
82		.cmd	= TIPC_NL_BEARER_GET,
83		.doit	= tipc_nl_bearer_get,
84		.dumpit	= tipc_nl_bearer_dump,
85		.policy = tipc_nl_policy,
86	},
87	{
88		.cmd	= TIPC_NL_BEARER_SET,
89		.doit	= tipc_nl_bearer_set,
90		.policy = tipc_nl_policy,
91	},
92	{
93		.cmd	= TIPC_NL_SOCK_GET,
94		.dumpit	= tipc_nl_sk_dump,
95		.policy = tipc_nl_policy,
96	},
97	{
98		.cmd	= TIPC_NL_PUBL_GET,
99		.dumpit	= tipc_nl_publ_dump,
100		.policy = tipc_nl_policy,
101	},
102	{
103		.cmd	= TIPC_NL_LINK_GET,
104		.doit   = tipc_nl_link_get,
105		.dumpit	= tipc_nl_link_dump,
106		.policy = tipc_nl_policy,
107	},
108	{
109		.cmd	= TIPC_NL_LINK_SET,
110		.doit	= tipc_nl_link_set,
111		.policy = tipc_nl_policy,
112	},
113	{
114		.cmd	= TIPC_NL_LINK_RESET_STATS,
115		.doit   = tipc_nl_link_reset_stats,
116		.policy = tipc_nl_policy,
117	},
118	{
119		.cmd	= TIPC_NL_MEDIA_GET,
120		.doit	= tipc_nl_media_get,
121		.dumpit	= tipc_nl_media_dump,
122		.policy = tipc_nl_policy,
123	},
124	{
125		.cmd	= TIPC_NL_MEDIA_SET,
126		.doit	= tipc_nl_media_set,
127		.policy = tipc_nl_policy,
128	},
129	{
130		.cmd	= TIPC_NL_NODE_GET,
131		.dumpit	= tipc_nl_node_dump,
132		.policy = tipc_nl_policy,
133	},
134	{
135		.cmd	= TIPC_NL_NET_GET,
136		.dumpit	= tipc_nl_net_dump,
137		.policy = tipc_nl_policy,
138	},
139	{
140		.cmd	= TIPC_NL_NET_SET,
141		.doit	= tipc_nl_net_set,
142		.policy = tipc_nl_policy,
143	},
144	{
145		.cmd	= TIPC_NL_NAME_TABLE_GET,
146		.dumpit	= tipc_nl_name_table_dump,
147		.policy = tipc_nl_policy,
148	}
149};
150
151int tipc_nlmsg_parse(const struct nlmsghdr *nlh, struct nlattr ***attr)
152{
153	u32 maxattr = tipc_genl_family.maxattr;
154
155	*attr = tipc_genl_family.attrbuf;
156	if (!*attr)
157		return -EOPNOTSUPP;
158
159	return nlmsg_parse(nlh, GENL_HDRLEN, *attr, maxattr, tipc_nl_policy);
160}
161
162int tipc_netlink_start(void)
163{
164	int res;
165
166	res = genl_register_family_with_ops(&tipc_genl_family,
167					    tipc_genl_v2_ops);
168	if (res) {
169		pr_err("Failed to register netlink interface\n");
170		return res;
171	}
172	return 0;
173}
174
175void tipc_netlink_stop(void)
176{
177	genl_unregister_family(&tipc_genl_family);
178}
179