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 [TIPC_NLA_NET_NODEID] = { .type = NLA_U64 },
85 [TIPC_NLA_NET_NODEID_W1] = { .type = NLA_U64 },
86 };
87
88 const 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_NUL_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
102 const 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 */
109 const 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 [TIPC_NLA_PROP_MTU] = { .type = NLA_U32 },
115 [TIPC_NLA_PROP_BROADCAST] = { .type = NLA_U32 },
116 [TIPC_NLA_PROP_BROADCAST_RATIO] = { .type = NLA_U32 }
117 };
118
119 const struct nla_policy tipc_nl_bearer_policy[TIPC_NLA_BEARER_MAX + 1] = {
120 [TIPC_NLA_BEARER_UNSPEC] = { .type = NLA_UNSPEC },
121 [TIPC_NLA_BEARER_NAME] = { .type = NLA_NUL_STRING,
122 .len = TIPC_MAX_BEARER_NAME },
123 [TIPC_NLA_BEARER_PROP] = { .type = NLA_NESTED },
124 [TIPC_NLA_BEARER_DOMAIN] = { .type = NLA_U32 }
125 };
126
127 const struct nla_policy tipc_nl_media_policy[TIPC_NLA_MEDIA_MAX + 1] = {
128 [TIPC_NLA_MEDIA_UNSPEC] = { .type = NLA_UNSPEC },
129 [TIPC_NLA_MEDIA_NAME] = { .type = NLA_STRING },
130 [TIPC_NLA_MEDIA_PROP] = { .type = NLA_NESTED }
131 };
132
133 const struct nla_policy tipc_nl_udp_policy[TIPC_NLA_UDP_MAX + 1] = {
134 [TIPC_NLA_UDP_UNSPEC] = {.type = NLA_UNSPEC},
135 [TIPC_NLA_UDP_LOCAL] = {.type = NLA_BINARY,
136 .len = sizeof(struct sockaddr_storage)},
137 [TIPC_NLA_UDP_REMOTE] = {.type = NLA_BINARY,
138 .len = sizeof(struct sockaddr_storage)},
139 };
140
141 /* Users of the legacy API (tipc-config) can't handle that we add operations,
142 * so we have a separate genl handling for the new API.
143 */
144 static const struct genl_ops tipc_genl_v2_ops[] = {
145 {
146 .cmd = TIPC_NL_BEARER_DISABLE,
147 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
148 .doit = tipc_nl_bearer_disable,
149 },
150 {
151 .cmd = TIPC_NL_BEARER_ENABLE,
152 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
153 .doit = tipc_nl_bearer_enable,
154 },
155 {
156 .cmd = TIPC_NL_BEARER_GET,
157 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
158 .doit = tipc_nl_bearer_get,
159 .dumpit = tipc_nl_bearer_dump,
160 },
161 {
162 .cmd = TIPC_NL_BEARER_ADD,
163 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
164 .doit = tipc_nl_bearer_add,
165 },
166 {
167 .cmd = TIPC_NL_BEARER_SET,
168 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
169 .doit = tipc_nl_bearer_set,
170 },
171 {
172 .cmd = TIPC_NL_SOCK_GET,
173 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
174 .start = tipc_dump_start,
175 .dumpit = tipc_nl_sk_dump,
176 .done = tipc_dump_done,
177 },
178 {
179 .cmd = TIPC_NL_PUBL_GET,
180 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
181 .dumpit = tipc_nl_publ_dump,
182 },
183 {
184 .cmd = TIPC_NL_LINK_GET,
185 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
186 .doit = tipc_nl_node_get_link,
187 .dumpit = tipc_nl_node_dump_link,
188 },
189 {
190 .cmd = TIPC_NL_LINK_SET,
191 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
192 .doit = tipc_nl_node_set_link,
193 },
194 {
195 .cmd = TIPC_NL_LINK_RESET_STATS,
196 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
197 .doit = tipc_nl_node_reset_link_stats,
198 },
199 {
200 .cmd = TIPC_NL_MEDIA_GET,
201 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
202 .doit = tipc_nl_media_get,
203 .dumpit = tipc_nl_media_dump,
204 },
205 {
206 .cmd = TIPC_NL_MEDIA_SET,
207 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
208 .doit = tipc_nl_media_set,
209 },
210 {
211 .cmd = TIPC_NL_NODE_GET,
212 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
213 .dumpit = tipc_nl_node_dump,
214 },
215 {
216 .cmd = TIPC_NL_NET_GET,
217 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
218 .dumpit = tipc_nl_net_dump,
219 },
220 {
221 .cmd = TIPC_NL_NET_SET,
222 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
223 .doit = tipc_nl_net_set,
224 },
225 {
226 .cmd = TIPC_NL_NAME_TABLE_GET,
227 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
228 .dumpit = tipc_nl_name_table_dump,
229 },
230 {
231 .cmd = TIPC_NL_MON_SET,
232 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
233 .doit = tipc_nl_node_set_monitor,
234 },
235 {
236 .cmd = TIPC_NL_MON_GET,
237 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
238 .doit = tipc_nl_node_get_monitor,
239 .dumpit = tipc_nl_node_dump_monitor,
240 },
241 {
242 .cmd = TIPC_NL_MON_PEER_GET,
243 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
244 .dumpit = tipc_nl_node_dump_monitor_peer,
245 },
246 {
247 .cmd = TIPC_NL_PEER_REMOVE,
248 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
249 .doit = tipc_nl_peer_rm,
250 },
251 #ifdef CONFIG_TIPC_MEDIA_UDP
252 {
253 .cmd = TIPC_NL_UDP_GET_REMOTEIP,
254 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
255 .dumpit = tipc_udp_nl_dump_remoteip,
256 },
257 #endif
258 };
259
260 struct genl_family tipc_genl_family __ro_after_init = {
261 .name = TIPC_GENL_V2_NAME,
262 .version = TIPC_GENL_V2_VERSION,
263 .hdrsize = 0,
264 .maxattr = TIPC_NLA_MAX,
265 .policy = tipc_nl_policy,
266 .netnsok = true,
267 .module = THIS_MODULE,
268 .ops = tipc_genl_v2_ops,
269 .n_ops = ARRAY_SIZE(tipc_genl_v2_ops),
270 };
271
tipc_nlmsg_parse(const struct nlmsghdr * nlh,struct nlattr *** attr)272 int tipc_nlmsg_parse(const struct nlmsghdr *nlh, struct nlattr ***attr)
273 {
274 u32 maxattr = tipc_genl_family.maxattr;
275
276 *attr = genl_family_attrbuf(&tipc_genl_family);
277 if (!*attr)
278 return -EOPNOTSUPP;
279
280 return nlmsg_parse_deprecated(nlh, GENL_HDRLEN, *attr, maxattr,
281 tipc_nl_policy, NULL);
282 }
283
tipc_netlink_start(void)284 int __init tipc_netlink_start(void)
285 {
286 int res;
287
288 res = genl_register_family(&tipc_genl_family);
289 if (res) {
290 pr_err("Failed to register netlink interface\n");
291 return res;
292 }
293 return 0;
294 }
295
tipc_netlink_stop(void)296 void tipc_netlink_stop(void)
297 {
298 genl_unregister_family(&tipc_genl_family);
299 }
300