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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}
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};
84
85const struct nla_policy tipc_nl_link_policy[TIPC_NLA_LINK_MAX + 1] = {
86 [TIPC_NLA_LINK_UNSPEC] = { .type = NLA_UNSPEC },
87 [TIPC_NLA_LINK_NAME] = { .type = NLA_STRING,
88 .len = TIPC_MAX_LINK_NAME },
89 [TIPC_NLA_LINK_MTU] = { .type = NLA_U32 },
90 [TIPC_NLA_LINK_BROADCAST] = { .type = NLA_FLAG },
91 [TIPC_NLA_LINK_UP] = { .type = NLA_FLAG },
92 [TIPC_NLA_LINK_ACTIVE] = { .type = NLA_FLAG },
93 [TIPC_NLA_LINK_PROP] = { .type = NLA_NESTED },
94 [TIPC_NLA_LINK_STATS] = { .type = NLA_NESTED },
95 [TIPC_NLA_LINK_RX] = { .type = NLA_U32 },
96 [TIPC_NLA_LINK_TX] = { .type = NLA_U32 }
97};
98
99const struct nla_policy tipc_nl_node_policy[TIPC_NLA_NODE_MAX + 1] = {
100 [TIPC_NLA_NODE_UNSPEC] = { .type = NLA_UNSPEC },
101 [TIPC_NLA_NODE_ADDR] = { .type = NLA_U32 },
102 [TIPC_NLA_NODE_UP] = { .type = NLA_FLAG }
103};
104
105/* Properties valid for media, bearer and link */
106const struct nla_policy tipc_nl_prop_policy[TIPC_NLA_PROP_MAX + 1] = {
107 [TIPC_NLA_PROP_UNSPEC] = { .type = NLA_UNSPEC },
108 [TIPC_NLA_PROP_PRIO] = { .type = NLA_U32 },
109 [TIPC_NLA_PROP_TOL] = { .type = NLA_U32 },
110 [TIPC_NLA_PROP_WIN] = { .type = NLA_U32 }
111};
112
113const struct nla_policy tipc_nl_bearer_policy[TIPC_NLA_BEARER_MAX + 1] = {
114 [TIPC_NLA_BEARER_UNSPEC] = { .type = NLA_UNSPEC },
115 [TIPC_NLA_BEARER_NAME] = { .type = NLA_STRING,
116 .len = TIPC_MAX_BEARER_NAME },
117 [TIPC_NLA_BEARER_PROP] = { .type = NLA_NESTED },
118 [TIPC_NLA_BEARER_DOMAIN] = { .type = NLA_U32 }
119};
120
121const struct nla_policy tipc_nl_media_policy[TIPC_NLA_MEDIA_MAX + 1] = {
122 [TIPC_NLA_MEDIA_UNSPEC] = { .type = NLA_UNSPEC },
123 [TIPC_NLA_MEDIA_NAME] = { .type = NLA_STRING },
124 [TIPC_NLA_MEDIA_PROP] = { .type = NLA_NESTED }
125};
126
127const struct nla_policy tipc_nl_udp_policy[TIPC_NLA_UDP_MAX + 1] = {
128 [TIPC_NLA_UDP_UNSPEC] = {.type = NLA_UNSPEC},
129 [TIPC_NLA_UDP_LOCAL] = {.type = NLA_BINARY,
130 .len = sizeof(struct sockaddr_storage)},
131 [TIPC_NLA_UDP_REMOTE] = {.type = NLA_BINARY,
132 .len = sizeof(struct sockaddr_storage)},
133};
134
135/* Users of the legacy API (tipc-config) can't handle that we add operations,
136 * so we have a separate genl handling for the new API.
137 */
138static const struct genl_ops tipc_genl_v2_ops[] = {
139 {
140 .cmd = TIPC_NL_BEARER_DISABLE,
141 .doit = tipc_nl_bearer_disable,
142 .policy = tipc_nl_policy,
143 },
144 {
145 .cmd = TIPC_NL_BEARER_ENABLE,
146 .doit = tipc_nl_bearer_enable,
147 .policy = tipc_nl_policy,
148 },
149 {
150 .cmd = TIPC_NL_BEARER_GET,
151 .doit = tipc_nl_bearer_get,
152 .dumpit = tipc_nl_bearer_dump,
153 .policy = tipc_nl_policy,
154 },
155 {
156 .cmd = TIPC_NL_BEARER_ADD,
157 .doit = tipc_nl_bearer_add,
158 .policy = tipc_nl_policy,
159 },
160 {
161 .cmd = TIPC_NL_BEARER_SET,
162 .doit = tipc_nl_bearer_set,
163 .policy = tipc_nl_policy,
164 },
165 {
166 .cmd = TIPC_NL_SOCK_GET,
167 .dumpit = tipc_nl_sk_dump,
168 .policy = tipc_nl_policy,
169 },
170 {
171 .cmd = TIPC_NL_PUBL_GET,
172 .dumpit = tipc_nl_publ_dump,
173 .policy = tipc_nl_policy,
174 },
175 {
176 .cmd = TIPC_NL_LINK_GET,
177 .doit = tipc_nl_node_get_link,
178 .dumpit = tipc_nl_node_dump_link,
179 .policy = tipc_nl_policy,
180 },
181 {
182 .cmd = TIPC_NL_LINK_SET,
183 .doit = tipc_nl_node_set_link,
184 .policy = tipc_nl_policy,
185 },
186 {
187 .cmd = TIPC_NL_LINK_RESET_STATS,
188 .doit = tipc_nl_node_reset_link_stats,
189 .policy = tipc_nl_policy,
190 },
191 {
192 .cmd = TIPC_NL_MEDIA_GET,
193 .doit = tipc_nl_media_get,
194 .dumpit = tipc_nl_media_dump,
195 .policy = tipc_nl_policy,
196 },
197 {
198 .cmd = TIPC_NL_MEDIA_SET,
199 .doit = tipc_nl_media_set,
200 .policy = tipc_nl_policy,
201 },
202 {
203 .cmd = TIPC_NL_NODE_GET,
204 .dumpit = tipc_nl_node_dump,
205 .policy = tipc_nl_policy,
206 },
207 {
208 .cmd = TIPC_NL_NET_GET,
209 .dumpit = tipc_nl_net_dump,
210 .policy = tipc_nl_policy,
211 },
212 {
213 .cmd = TIPC_NL_NET_SET,
214 .doit = tipc_nl_net_set,
215 .policy = tipc_nl_policy,
216 },
217 {
218 .cmd = TIPC_NL_NAME_TABLE_GET,
219 .dumpit = tipc_nl_name_table_dump,
220 .policy = tipc_nl_policy,
221 },
222 {
223 .cmd = TIPC_NL_MON_SET,
224 .doit = tipc_nl_node_set_monitor,
225 .policy = tipc_nl_policy,
226 },
227 {
228 .cmd = TIPC_NL_MON_GET,
229 .doit = tipc_nl_node_get_monitor,
230 .dumpit = tipc_nl_node_dump_monitor,
231 .policy = tipc_nl_policy,
232 },
233 {
234 .cmd = TIPC_NL_MON_PEER_GET,
235 .dumpit = tipc_nl_node_dump_monitor_peer,
236 .policy = tipc_nl_policy,
237 },
238 {
239 .cmd = TIPC_NL_PEER_REMOVE,
240 .doit = tipc_nl_peer_rm,
241 .policy = tipc_nl_policy,
242 },
243#ifdef CONFIG_TIPC_MEDIA_UDP
244 {
245 .cmd = TIPC_NL_UDP_GET_REMOTEIP,
246 .dumpit = tipc_udp_nl_dump_remoteip,
247 .policy = tipc_nl_policy,
248 },
249#endif
250};
251
252struct genl_family tipc_genl_family __ro_after_init = {
253 .name = TIPC_GENL_V2_NAME,
254 .version = TIPC_GENL_V2_VERSION,
255 .hdrsize = 0,
256 .maxattr = TIPC_NLA_MAX,
257 .netnsok = true,
258 .module = THIS_MODULE,
259 .ops = tipc_genl_v2_ops,
260 .n_ops = ARRAY_SIZE(tipc_genl_v2_ops),
261};
262
263int tipc_nlmsg_parse(const struct nlmsghdr *nlh, struct nlattr ***attr)
264{
265 u32 maxattr = tipc_genl_family.maxattr;
266
267 *attr = genl_family_attrbuf(&tipc_genl_family);
268 if (!*attr)
269 return -EOPNOTSUPP;
270
271 return nlmsg_parse(nlh, GENL_HDRLEN, *attr, maxattr, tipc_nl_policy);
272}
273
274int __init tipc_netlink_start(void)
275{
276 int res;
277
278 res = genl_register_family(&tipc_genl_family);
279 if (res) {
280 pr_err("Failed to register netlink interface\n");
281 return res;
282 }
283 return 0;
284}
285
286void tipc_netlink_stop(void)
287{
288 genl_unregister_family(&tipc_genl_family);
289}