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v3.15
  1/*
  2 * net/tipc/netlink.c: TIPC configuration handling
  3 *
  4 * Copyright (c) 2005-2006, 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 "config.h"
 
 
 
 
 
 
 39#include <net/genetlink.h>
 40
 41static int handle_cmd(struct sk_buff *skb, struct genl_info *info)
 42{
 43	struct sk_buff *rep_buf;
 44	struct nlmsghdr *rep_nlh;
 45	struct nlmsghdr *req_nlh = info->nlhdr;
 46	struct tipc_genlmsghdr *req_userhdr = info->userhdr;
 47	int hdr_space = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN);
 48	u16 cmd;
 49
 50	if ((req_userhdr->cmd & 0xC000) && (!netlink_capable(skb, CAP_NET_ADMIN)))
 51		cmd = TIPC_CMD_NOT_NET_ADMIN;
 52	else
 53		cmd = req_userhdr->cmd;
 54
 55	rep_buf = tipc_cfg_do_cmd(req_userhdr->dest, cmd,
 56			nlmsg_data(req_nlh) + GENL_HDRLEN + TIPC_GENL_HDRLEN,
 57			nlmsg_attrlen(req_nlh, GENL_HDRLEN + TIPC_GENL_HDRLEN),
 58			hdr_space);
 59
 60	if (rep_buf) {
 61		skb_push(rep_buf, hdr_space);
 62		rep_nlh = nlmsg_hdr(rep_buf);
 63		memcpy(rep_nlh, req_nlh, hdr_space);
 64		rep_nlh->nlmsg_len = rep_buf->len;
 65		genlmsg_unicast(&init_net, rep_buf, NETLINK_CB(skb).portid);
 66	}
 67
 68	return 0;
 69}
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 70
 71static struct genl_family tipc_genl_family = {
 72	.id		= GENL_ID_GENERATE,
 73	.name		= TIPC_GENL_NAME,
 74	.version	= TIPC_GENL_VERSION,
 75	.hdrsize	= TIPC_GENL_HDRLEN,
 76	.maxattr	= 0,
 77};
 78
 79static struct genl_ops tipc_genl_ops[] = {
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 80	{
 81		.cmd		= TIPC_GENL_CMD,
 82		.doit		= handle_cmd,
 
 83	},
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 84};
 85
 86int tipc_netlink_start(void)
 
 
 
 
 
 
 
 
 
 
 
 
 87{
 88	int res;
 89
 90	res = genl_register_family_with_ops(&tipc_genl_family, tipc_genl_ops);
 91	if (res) {
 92		pr_err("Failed to register netlink interface\n");
 93		return res;
 94	}
 95	return 0;
 96}
 97
 98void tipc_netlink_stop(void)
 99{
100	genl_unregister_family(&tipc_genl_family);
101}
v4.17
  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 "udp_media.h"
 45#include <net/genetlink.h>
 46
 47static const struct nla_policy tipc_nl_policy[TIPC_NLA_MAX + 1] = {
 48	[TIPC_NLA_UNSPEC]	= { .type = NLA_UNSPEC, },
 49	[TIPC_NLA_BEARER]	= { .type = NLA_NESTED, },
 50	[TIPC_NLA_SOCK]		= { .type = NLA_NESTED, },
 51	[TIPC_NLA_PUBL]		= { .type = NLA_NESTED, },
 52	[TIPC_NLA_LINK]		= { .type = NLA_NESTED, },
 53	[TIPC_NLA_MEDIA]	= { .type = NLA_NESTED, },
 54	[TIPC_NLA_NODE]		= { .type = NLA_NESTED, },
 55	[TIPC_NLA_NET]		= { .type = NLA_NESTED, },
 56	[TIPC_NLA_NAME_TABLE]	= { .type = NLA_NESTED, },
 57	[TIPC_NLA_MON]		= { .type = NLA_NESTED, },
 58};
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 59
 60const struct nla_policy
 61tipc_nl_name_table_policy[TIPC_NLA_NAME_TABLE_MAX + 1] = {
 62	[TIPC_NLA_NAME_TABLE_UNSPEC]	= { .type = NLA_UNSPEC },
 63	[TIPC_NLA_NAME_TABLE_PUBL]	= { .type = NLA_NESTED }
 64};
 65
 66const struct nla_policy tipc_nl_monitor_policy[TIPC_NLA_MON_MAX + 1] = {
 67	[TIPC_NLA_MON_UNSPEC]			= { .type = NLA_UNSPEC },
 68	[TIPC_NLA_MON_REF]			= { .type = NLA_U32 },
 69	[TIPC_NLA_MON_ACTIVATION_THRESHOLD]	= { .type = NLA_U32 },
 70};
 71
 72const struct nla_policy tipc_nl_sock_policy[TIPC_NLA_SOCK_MAX + 1] = {
 73	[TIPC_NLA_SOCK_UNSPEC]		= { .type = NLA_UNSPEC },
 74	[TIPC_NLA_SOCK_ADDR]		= { .type = NLA_U32 },
 75	[TIPC_NLA_SOCK_REF]		= { .type = NLA_U32 },
 76	[TIPC_NLA_SOCK_CON]		= { .type = NLA_NESTED },
 77	[TIPC_NLA_SOCK_HAS_PUBL]	= { .type = NLA_FLAG }
 78};
 79
 80const struct nla_policy tipc_nl_net_policy[TIPC_NLA_NET_MAX + 1] = {
 81	[TIPC_NLA_NET_UNSPEC]		= { .type = NLA_UNSPEC },
 82	[TIPC_NLA_NET_ID]		= { .type = NLA_U32 },
 83	[TIPC_NLA_NET_ADDR]		= { .type = NLA_U32 },
 84	[TIPC_NLA_NET_NODEID]		= { .type = NLA_U64 },
 85	[TIPC_NLA_NET_NODEID_W1]	= { .type = NLA_U64 },
 86};
 87
 88const struct nla_policy tipc_nl_link_policy[TIPC_NLA_LINK_MAX + 1] = {
 89	[TIPC_NLA_LINK_UNSPEC]		= { .type = NLA_UNSPEC },
 90	[TIPC_NLA_LINK_NAME]		= { .type = NLA_STRING,
 91					    .len = TIPC_MAX_LINK_NAME },
 92	[TIPC_NLA_LINK_MTU]		= { .type = NLA_U32 },
 93	[TIPC_NLA_LINK_BROADCAST]	= { .type = NLA_FLAG },
 94	[TIPC_NLA_LINK_UP]		= { .type = NLA_FLAG },
 95	[TIPC_NLA_LINK_ACTIVE]		= { .type = NLA_FLAG },
 96	[TIPC_NLA_LINK_PROP]		= { .type = NLA_NESTED },
 97	[TIPC_NLA_LINK_STATS]		= { .type = NLA_NESTED },
 98	[TIPC_NLA_LINK_RX]		= { .type = NLA_U32 },
 99	[TIPC_NLA_LINK_TX]		= { .type = NLA_U32 }
100};
101
102const struct nla_policy tipc_nl_node_policy[TIPC_NLA_NODE_MAX + 1] = {
103	[TIPC_NLA_NODE_UNSPEC]		= { .type = NLA_UNSPEC },
104	[TIPC_NLA_NODE_ADDR]		= { .type = NLA_U32 },
105	[TIPC_NLA_NODE_UP]		= { .type = NLA_FLAG }
106};
107
108/* Properties valid for media, bearer and link */
109const struct nla_policy tipc_nl_prop_policy[TIPC_NLA_PROP_MAX + 1] = {
110	[TIPC_NLA_PROP_UNSPEC]		= { .type = NLA_UNSPEC },
111	[TIPC_NLA_PROP_PRIO]		= { .type = NLA_U32 },
112	[TIPC_NLA_PROP_TOL]		= { .type = NLA_U32 },
113	[TIPC_NLA_PROP_WIN]		= { .type = NLA_U32 }
114};
115
116const struct nla_policy tipc_nl_bearer_policy[TIPC_NLA_BEARER_MAX + 1]	= {
117	[TIPC_NLA_BEARER_UNSPEC]	= { .type = NLA_UNSPEC },
118	[TIPC_NLA_BEARER_NAME]		= { .type = NLA_STRING,
119					    .len = TIPC_MAX_BEARER_NAME },
120	[TIPC_NLA_BEARER_PROP]		= { .type = NLA_NESTED },
121	[TIPC_NLA_BEARER_DOMAIN]	= { .type = NLA_U32 }
122};
123
124const struct nla_policy tipc_nl_media_policy[TIPC_NLA_MEDIA_MAX + 1] = {
125	[TIPC_NLA_MEDIA_UNSPEC]		= { .type = NLA_UNSPEC },
126	[TIPC_NLA_MEDIA_NAME]		= { .type = NLA_STRING },
127	[TIPC_NLA_MEDIA_PROP]		= { .type = NLA_NESTED }
128};
129
130const struct nla_policy tipc_nl_udp_policy[TIPC_NLA_UDP_MAX + 1] = {
131	[TIPC_NLA_UDP_UNSPEC]	= {.type = NLA_UNSPEC},
132	[TIPC_NLA_UDP_LOCAL]	= {.type = NLA_BINARY,
133				   .len = sizeof(struct sockaddr_storage)},
134	[TIPC_NLA_UDP_REMOTE]	= {.type = NLA_BINARY,
135				   .len = sizeof(struct sockaddr_storage)},
136};
137
138/* Users of the legacy API (tipc-config) can't handle that we add operations,
139 * so we have a separate genl handling for the new API.
140 */
141static const struct genl_ops tipc_genl_v2_ops[] = {
142	{
143		.cmd	= TIPC_NL_BEARER_DISABLE,
144		.doit	= tipc_nl_bearer_disable,
145		.policy = tipc_nl_policy,
146	},
147	{
148		.cmd	= TIPC_NL_BEARER_ENABLE,
149		.doit	= tipc_nl_bearer_enable,
150		.policy = tipc_nl_policy,
151	},
152	{
153		.cmd	= TIPC_NL_BEARER_GET,
154		.doit	= tipc_nl_bearer_get,
155		.dumpit	= tipc_nl_bearer_dump,
156		.policy = tipc_nl_policy,
157	},
158	{
159		.cmd	= TIPC_NL_BEARER_ADD,
160		.doit	= tipc_nl_bearer_add,
161		.policy = tipc_nl_policy,
162	},
163	{
164		.cmd	= TIPC_NL_BEARER_SET,
165		.doit	= tipc_nl_bearer_set,
166		.policy = tipc_nl_policy,
167	},
168	{
169		.cmd	= TIPC_NL_SOCK_GET,
170		.dumpit	= tipc_nl_sk_dump,
171		.policy = tipc_nl_policy,
172	},
173	{
174		.cmd	= TIPC_NL_PUBL_GET,
175		.dumpit	= tipc_nl_publ_dump,
176		.policy = tipc_nl_policy,
177	},
178	{
179		.cmd	= TIPC_NL_LINK_GET,
180		.doit   = tipc_nl_node_get_link,
181		.dumpit	= tipc_nl_node_dump_link,
182		.policy = tipc_nl_policy,
183	},
184	{
185		.cmd	= TIPC_NL_LINK_SET,
186		.doit	= tipc_nl_node_set_link,
187		.policy = tipc_nl_policy,
188	},
189	{
190		.cmd	= TIPC_NL_LINK_RESET_STATS,
191		.doit   = tipc_nl_node_reset_link_stats,
192		.policy = tipc_nl_policy,
193	},
194	{
195		.cmd	= TIPC_NL_MEDIA_GET,
196		.doit	= tipc_nl_media_get,
197		.dumpit	= tipc_nl_media_dump,
198		.policy = tipc_nl_policy,
199	},
200	{
201		.cmd	= TIPC_NL_MEDIA_SET,
202		.doit	= tipc_nl_media_set,
203		.policy = tipc_nl_policy,
204	},
205	{
206		.cmd	= TIPC_NL_NODE_GET,
207		.dumpit	= tipc_nl_node_dump,
208		.policy = tipc_nl_policy,
209	},
210	{
211		.cmd	= TIPC_NL_NET_GET,
212		.dumpit	= tipc_nl_net_dump,
213		.policy = tipc_nl_policy,
214	},
215	{
216		.cmd	= TIPC_NL_NET_SET,
217		.doit	= tipc_nl_net_set,
218		.policy = tipc_nl_policy,
219	},
220	{
221		.cmd	= TIPC_NL_NAME_TABLE_GET,
222		.dumpit	= tipc_nl_name_table_dump,
223		.policy = tipc_nl_policy,
224	},
225	{
226		.cmd	= TIPC_NL_MON_SET,
227		.doit	= tipc_nl_node_set_monitor,
228		.policy = tipc_nl_policy,
229	},
230	{
231		.cmd	= TIPC_NL_MON_GET,
232		.doit	= tipc_nl_node_get_monitor,
233		.dumpit	= tipc_nl_node_dump_monitor,
234		.policy = tipc_nl_policy,
235	},
236	{
237		.cmd	= TIPC_NL_MON_PEER_GET,
238		.dumpit	= tipc_nl_node_dump_monitor_peer,
239		.policy = tipc_nl_policy,
240	},
241	{
242		.cmd	= TIPC_NL_PEER_REMOVE,
243		.doit	= tipc_nl_peer_rm,
244		.policy = tipc_nl_policy,
245	},
246#ifdef CONFIG_TIPC_MEDIA_UDP
247	{
248		.cmd	= TIPC_NL_UDP_GET_REMOTEIP,
249		.dumpit	= tipc_udp_nl_dump_remoteip,
250		.policy = tipc_nl_policy,
251	},
252#endif
253};
254
255struct genl_family tipc_genl_family __ro_after_init = {
256	.name		= TIPC_GENL_V2_NAME,
257	.version	= TIPC_GENL_V2_VERSION,
258	.hdrsize	= 0,
259	.maxattr	= TIPC_NLA_MAX,
260	.netnsok	= true,
261	.module		= THIS_MODULE,
262	.ops		= tipc_genl_v2_ops,
263	.n_ops		= ARRAY_SIZE(tipc_genl_v2_ops),
264};
265
266int tipc_nlmsg_parse(const struct nlmsghdr *nlh, struct nlattr ***attr)
267{
268	u32 maxattr = tipc_genl_family.maxattr;
269
270	*attr = genl_family_attrbuf(&tipc_genl_family);
271	if (!*attr)
272		return -EOPNOTSUPP;
273
274	return nlmsg_parse(nlh, GENL_HDRLEN, *attr, maxattr, tipc_nl_policy,
275			   NULL);
276}
277
278int __init tipc_netlink_start(void)
279{
280	int res;
281
282	res = genl_register_family(&tipc_genl_family);
283	if (res) {
284		pr_err("Failed to register netlink interface\n");
285		return res;
286	}
287	return 0;
288}
289
290void tipc_netlink_stop(void)
291{
292	genl_unregister_family(&tipc_genl_family);
293}