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
47 static 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
60 const struct nla_policy
61 tipc_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
66 const 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
72 const 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
80 const 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 };
85
86 const struct nla_policy tipc_nl_link_policy[TIPC_NLA_LINK_MAX + 1] = {
87 [TIPC_NLA_LINK_UNSPEC] = { .type = NLA_UNSPEC },
88 [TIPC_NLA_LINK_NAME] = { .type = NLA_STRING,
89 .len = TIPC_MAX_LINK_NAME },
90 [TIPC_NLA_LINK_MTU] = { .type = NLA_U32 },
91 [TIPC_NLA_LINK_BROADCAST] = { .type = NLA_FLAG },
92 [TIPC_NLA_LINK_UP] = { .type = NLA_FLAG },
93 [TIPC_NLA_LINK_ACTIVE] = { .type = NLA_FLAG },
94 [TIPC_NLA_LINK_PROP] = { .type = NLA_NESTED },
95 [TIPC_NLA_LINK_STATS] = { .type = NLA_NESTED },
96 [TIPC_NLA_LINK_RX] = { .type = NLA_U32 },
97 [TIPC_NLA_LINK_TX] = { .type = NLA_U32 }
98 };
99
100 const struct nla_policy tipc_nl_node_policy[TIPC_NLA_NODE_MAX + 1] = {
101 [TIPC_NLA_NODE_UNSPEC] = { .type = NLA_UNSPEC },
102 [TIPC_NLA_NODE_ADDR] = { .type = NLA_U32 },
103 [TIPC_NLA_NODE_UP] = { .type = NLA_FLAG }
104 };
105
106 /* Properties valid for media, bearer and link */
107 const struct nla_policy tipc_nl_prop_policy[TIPC_NLA_PROP_MAX + 1] = {
108 [TIPC_NLA_PROP_UNSPEC] = { .type = NLA_UNSPEC },
109 [TIPC_NLA_PROP_PRIO] = { .type = NLA_U32 },
110 [TIPC_NLA_PROP_TOL] = { .type = NLA_U32 },
111 [TIPC_NLA_PROP_WIN] = { .type = NLA_U32 }
112 };
113
114 const struct nla_policy tipc_nl_bearer_policy[TIPC_NLA_BEARER_MAX + 1] = {
115 [TIPC_NLA_BEARER_UNSPEC] = { .type = NLA_UNSPEC },
116 [TIPC_NLA_BEARER_NAME] = { .type = NLA_STRING,
117 .len = TIPC_MAX_BEARER_NAME },
118 [TIPC_NLA_BEARER_PROP] = { .type = NLA_NESTED },
119 [TIPC_NLA_BEARER_DOMAIN] = { .type = NLA_U32 }
120 };
121
122 const struct nla_policy tipc_nl_media_policy[TIPC_NLA_MEDIA_MAX + 1] = {
123 [TIPC_NLA_MEDIA_UNSPEC] = { .type = NLA_UNSPEC },
124 [TIPC_NLA_MEDIA_NAME] = { .type = NLA_STRING },
125 [TIPC_NLA_MEDIA_PROP] = { .type = NLA_NESTED }
126 };
127
128 const struct nla_policy tipc_nl_udp_policy[TIPC_NLA_UDP_MAX + 1] = {
129 [TIPC_NLA_UDP_UNSPEC] = {.type = NLA_UNSPEC},
130 [TIPC_NLA_UDP_LOCAL] = {.type = NLA_BINARY,
131 .len = sizeof(struct sockaddr_storage)},
132 [TIPC_NLA_UDP_REMOTE] = {.type = NLA_BINARY,
133 .len = sizeof(struct sockaddr_storage)},
134 };
135
136 /* Users of the legacy API (tipc-config) can't handle that we add operations,
137 * so we have a separate genl handling for the new API.
138 */
139 static const struct genl_ops tipc_genl_v2_ops[] = {
140 {
141 .cmd = TIPC_NL_BEARER_DISABLE,
142 .doit = tipc_nl_bearer_disable,
143 .policy = tipc_nl_policy,
144 },
145 {
146 .cmd = TIPC_NL_BEARER_ENABLE,
147 .doit = tipc_nl_bearer_enable,
148 .policy = tipc_nl_policy,
149 },
150 {
151 .cmd = TIPC_NL_BEARER_GET,
152 .doit = tipc_nl_bearer_get,
153 .dumpit = tipc_nl_bearer_dump,
154 .policy = tipc_nl_policy,
155 },
156 {
157 .cmd = TIPC_NL_BEARER_ADD,
158 .doit = tipc_nl_bearer_add,
159 .policy = tipc_nl_policy,
160 },
161 {
162 .cmd = TIPC_NL_BEARER_SET,
163 .doit = tipc_nl_bearer_set,
164 .policy = tipc_nl_policy,
165 },
166 {
167 .cmd = TIPC_NL_SOCK_GET,
168 .dumpit = tipc_nl_sk_dump,
169 .policy = tipc_nl_policy,
170 },
171 {
172 .cmd = TIPC_NL_PUBL_GET,
173 .dumpit = tipc_nl_publ_dump,
174 .policy = tipc_nl_policy,
175 },
176 {
177 .cmd = TIPC_NL_LINK_GET,
178 .doit = tipc_nl_node_get_link,
179 .dumpit = tipc_nl_node_dump_link,
180 .policy = tipc_nl_policy,
181 },
182 {
183 .cmd = TIPC_NL_LINK_SET,
184 .doit = tipc_nl_node_set_link,
185 .policy = tipc_nl_policy,
186 },
187 {
188 .cmd = TIPC_NL_LINK_RESET_STATS,
189 .doit = tipc_nl_node_reset_link_stats,
190 .policy = tipc_nl_policy,
191 },
192 {
193 .cmd = TIPC_NL_MEDIA_GET,
194 .doit = tipc_nl_media_get,
195 .dumpit = tipc_nl_media_dump,
196 .policy = tipc_nl_policy,
197 },
198 {
199 .cmd = TIPC_NL_MEDIA_SET,
200 .doit = tipc_nl_media_set,
201 .policy = tipc_nl_policy,
202 },
203 {
204 .cmd = TIPC_NL_NODE_GET,
205 .dumpit = tipc_nl_node_dump,
206 .policy = tipc_nl_policy,
207 },
208 {
209 .cmd = TIPC_NL_NET_GET,
210 .dumpit = tipc_nl_net_dump,
211 .policy = tipc_nl_policy,
212 },
213 {
214 .cmd = TIPC_NL_NET_SET,
215 .doit = tipc_nl_net_set,
216 .policy = tipc_nl_policy,
217 },
218 {
219 .cmd = TIPC_NL_NAME_TABLE_GET,
220 .dumpit = tipc_nl_name_table_dump,
221 .policy = tipc_nl_policy,
222 },
223 {
224 .cmd = TIPC_NL_MON_SET,
225 .doit = tipc_nl_node_set_monitor,
226 .policy = tipc_nl_policy,
227 },
228 {
229 .cmd = TIPC_NL_MON_GET,
230 .doit = tipc_nl_node_get_monitor,
231 .dumpit = tipc_nl_node_dump_monitor,
232 .policy = tipc_nl_policy,
233 },
234 {
235 .cmd = TIPC_NL_MON_PEER_GET,
236 .dumpit = tipc_nl_node_dump_monitor_peer,
237 .policy = tipc_nl_policy,
238 },
239 {
240 .cmd = TIPC_NL_PEER_REMOVE,
241 .doit = tipc_nl_peer_rm,
242 .policy = tipc_nl_policy,
243 },
244 #ifdef CONFIG_TIPC_MEDIA_UDP
245 {
246 .cmd = TIPC_NL_UDP_GET_REMOTEIP,
247 .dumpit = tipc_udp_nl_dump_remoteip,
248 .policy = tipc_nl_policy,
249 },
250 #endif
251 };
252
253 struct genl_family tipc_genl_family __ro_after_init = {
254 .name = TIPC_GENL_V2_NAME,
255 .version = TIPC_GENL_V2_VERSION,
256 .hdrsize = 0,
257 .maxattr = TIPC_NLA_MAX,
258 .netnsok = true,
259 .module = THIS_MODULE,
260 .ops = tipc_genl_v2_ops,
261 .n_ops = ARRAY_SIZE(tipc_genl_v2_ops),
262 };
263
tipc_nlmsg_parse(const struct nlmsghdr * nlh,struct nlattr *** attr)264 int tipc_nlmsg_parse(const struct nlmsghdr *nlh, struct nlattr ***attr)
265 {
266 u32 maxattr = tipc_genl_family.maxattr;
267
268 *attr = genl_family_attrbuf(&tipc_genl_family);
269 if (!*attr)
270 return -EOPNOTSUPP;
271
272 return nlmsg_parse(nlh, GENL_HDRLEN, *attr, maxattr, tipc_nl_policy,
273 NULL);
274 }
275
tipc_netlink_start(void)276 int __init tipc_netlink_start(void)
277 {
278 int res;
279
280 res = genl_register_family(&tipc_genl_family);
281 if (res) {
282 pr_err("Failed to register netlink interface\n");
283 return res;
284 }
285 return 0;
286 }
287
tipc_netlink_stop(void)288 void tipc_netlink_stop(void)
289 {
290 genl_unregister_family(&tipc_genl_family);
291 }
292