Commit | Line | Data |
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b97bf3fd PL |
1 | /* |
2 | * net/tipc/netlink.c: TIPC configuration handling | |
c4307285 | 3 | * |
0655f6a8 | 4 | * Copyright (c) 2005-2006, 2014, Ericsson AB |
59f0c452 | 5 | * Copyright (c) 2005-2007, Wind River Systems |
b97bf3fd PL |
6 | * All rights reserved. |
7 | * | |
9ea1fd3c | 8 | * Redistribution and use in source and binary forms, with or without |
b97bf3fd PL |
9 | * modification, are permitted provided that the following conditions are met: |
10 | * | |
9ea1fd3c PL |
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. | |
b97bf3fd | 19 | * |
9ea1fd3c PL |
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 | |
b97bf3fd PL |
34 | * POSSIBILITY OF SUCH DAMAGE. |
35 | */ | |
36 | ||
37 | #include "core.h" | |
38 | #include "config.h" | |
34b78a12 | 39 | #include "socket.h" |
1593123a | 40 | #include "name_table.h" |
0655f6a8 | 41 | #include "bearer.h" |
7be57fc6 | 42 | #include "link.h" |
3e4b6ab5 | 43 | #include "node.h" |
fd3cf2ad | 44 | #include "net.h" |
b97bf3fd PL |
45 | #include <net/genetlink.h> |
46 | ||
47 | static int handle_cmd(struct sk_buff *skb, struct genl_info *info) | |
48 | { | |
49 | struct sk_buff *rep_buf; | |
50 | struct nlmsghdr *rep_nlh; | |
51 | struct nlmsghdr *req_nlh = info->nlhdr; | |
52 | struct tipc_genlmsghdr *req_userhdr = info->userhdr; | |
573ce260 | 53 | int hdr_space = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN); |
59f0c452 | 54 | u16 cmd; |
b97bf3fd | 55 | |
90f62cf3 | 56 | if ((req_userhdr->cmd & 0xC000) && (!netlink_capable(skb, CAP_NET_ADMIN))) |
59f0c452 | 57 | cmd = TIPC_CMD_NOT_NET_ADMIN; |
b97bf3fd | 58 | else |
59f0c452 AS |
59 | cmd = req_userhdr->cmd; |
60 | ||
61 | rep_buf = tipc_cfg_do_cmd(req_userhdr->dest, cmd, | |
573ce260 H |
62 | nlmsg_data(req_nlh) + GENL_HDRLEN + TIPC_GENL_HDRLEN, |
63 | nlmsg_attrlen(req_nlh, GENL_HDRLEN + TIPC_GENL_HDRLEN), | |
59f0c452 | 64 | hdr_space); |
b97bf3fd PL |
65 | |
66 | if (rep_buf) { | |
67 | skb_push(rep_buf, hdr_space); | |
b529ccf2 | 68 | rep_nlh = nlmsg_hdr(rep_buf); |
b97bf3fd PL |
69 | memcpy(rep_nlh, req_nlh, hdr_space); |
70 | rep_nlh->nlmsg_len = rep_buf->len; | |
15e47304 | 71 | genlmsg_unicast(&init_net, rep_buf, NETLINK_CB(skb).portid); |
b97bf3fd PL |
72 | } |
73 | ||
c4307285 | 74 | return 0; |
b97bf3fd PL |
75 | } |
76 | ||
0655f6a8 RA |
77 | static const struct nla_policy tipc_nl_policy[TIPC_NLA_MAX + 1] = { |
78 | [TIPC_NLA_UNSPEC] = { .type = NLA_UNSPEC, }, | |
79 | [TIPC_NLA_BEARER] = { .type = NLA_NESTED, }, | |
34b78a12 | 80 | [TIPC_NLA_SOCK] = { .type = NLA_NESTED, }, |
7be57fc6 RA |
81 | [TIPC_NLA_PUBL] = { .type = NLA_NESTED, }, |
82 | [TIPC_NLA_LINK] = { .type = NLA_NESTED, }, | |
46f15c67 | 83 | [TIPC_NLA_MEDIA] = { .type = NLA_NESTED, }, |
fd3cf2ad | 84 | [TIPC_NLA_NODE] = { .type = NLA_NESTED, }, |
1593123a RA |
85 | [TIPC_NLA_NET] = { .type = NLA_NESTED, }, |
86 | [TIPC_NLA_NAME_TABLE] = { .type = NLA_NESTED, } | |
0655f6a8 RA |
87 | }; |
88 | ||
89 | /* Legacy ASCII API */ | |
acb0a200 | 90 | static struct genl_family tipc_genl_family = { |
c4307285 YH |
91 | .id = GENL_ID_GENERATE, |
92 | .name = TIPC_GENL_NAME, | |
93 | .version = TIPC_GENL_VERSION, | |
94 | .hdrsize = TIPC_GENL_HDRLEN, | |
95 | .maxattr = 0, | |
b97bf3fd PL |
96 | }; |
97 | ||
0655f6a8 | 98 | /* Legacy ASCII API */ |
c53ed742 JB |
99 | static struct genl_ops tipc_genl_ops[] = { |
100 | { | |
101 | .cmd = TIPC_GENL_CMD, | |
102 | .doit = handle_cmd, | |
103 | }, | |
b97bf3fd PL |
104 | }; |
105 | ||
0655f6a8 RA |
106 | /* Users of the legacy API (tipc-config) can't handle that we add operations, |
107 | * so we have a separate genl handling for the new API. | |
108 | */ | |
109 | struct genl_family tipc_genl_v2_family = { | |
110 | .id = GENL_ID_GENERATE, | |
111 | .name = TIPC_GENL_V2_NAME, | |
112 | .version = TIPC_GENL_V2_VERSION, | |
113 | .hdrsize = 0, | |
114 | .maxattr = TIPC_NLA_MAX, | |
115 | }; | |
116 | ||
117 | static const struct genl_ops tipc_genl_v2_ops[] = { | |
118 | { | |
119 | .cmd = TIPC_NL_BEARER_DISABLE, | |
120 | .doit = tipc_nl_bearer_disable, | |
121 | .policy = tipc_nl_policy, | |
122 | }, | |
123 | { | |
124 | .cmd = TIPC_NL_BEARER_ENABLE, | |
125 | .doit = tipc_nl_bearer_enable, | |
126 | .policy = tipc_nl_policy, | |
35b9dd76 RA |
127 | }, |
128 | { | |
129 | .cmd = TIPC_NL_BEARER_GET, | |
130 | .doit = tipc_nl_bearer_get, | |
131 | .dumpit = tipc_nl_bearer_dump, | |
132 | .policy = tipc_nl_policy, | |
315c00bc RA |
133 | }, |
134 | { | |
135 | .cmd = TIPC_NL_BEARER_SET, | |
136 | .doit = tipc_nl_bearer_set, | |
137 | .policy = tipc_nl_policy, | |
34b78a12 RA |
138 | }, |
139 | { | |
140 | .cmd = TIPC_NL_SOCK_GET, | |
141 | .dumpit = tipc_nl_sk_dump, | |
142 | .policy = tipc_nl_policy, | |
1a1a143d RA |
143 | }, |
144 | { | |
145 | .cmd = TIPC_NL_PUBL_GET, | |
146 | .dumpit = tipc_nl_publ_dump, | |
147 | .policy = tipc_nl_policy, | |
7be57fc6 RA |
148 | }, |
149 | { | |
150 | .cmd = TIPC_NL_LINK_GET, | |
151 | .doit = tipc_nl_link_get, | |
152 | .dumpit = tipc_nl_link_dump, | |
153 | .policy = tipc_nl_policy, | |
f96ce7a2 RA |
154 | }, |
155 | { | |
156 | .cmd = TIPC_NL_LINK_SET, | |
157 | .doit = tipc_nl_link_set, | |
158 | .policy = tipc_nl_policy, | |
ae36342b RA |
159 | }, |
160 | { | |
161 | .cmd = TIPC_NL_LINK_RESET_STATS, | |
162 | .doit = tipc_nl_link_reset_stats, | |
163 | .policy = tipc_nl_policy, | |
46f15c67 RA |
164 | }, |
165 | { | |
166 | .cmd = TIPC_NL_MEDIA_GET, | |
167 | .doit = tipc_nl_media_get, | |
168 | .dumpit = tipc_nl_media_dump, | |
169 | .policy = tipc_nl_policy, | |
1e55417d RA |
170 | }, |
171 | { | |
172 | .cmd = TIPC_NL_MEDIA_SET, | |
173 | .doit = tipc_nl_media_set, | |
174 | .policy = tipc_nl_policy, | |
3e4b6ab5 RA |
175 | }, |
176 | { | |
177 | .cmd = TIPC_NL_NODE_GET, | |
178 | .dumpit = tipc_nl_node_dump, | |
179 | .policy = tipc_nl_policy, | |
fd3cf2ad RA |
180 | }, |
181 | { | |
182 | .cmd = TIPC_NL_NET_GET, | |
183 | .dumpit = tipc_nl_net_dump, | |
184 | .policy = tipc_nl_policy, | |
27c21416 RA |
185 | }, |
186 | { | |
187 | .cmd = TIPC_NL_NET_SET, | |
188 | .doit = tipc_nl_net_set, | |
189 | .policy = tipc_nl_policy, | |
1593123a RA |
190 | }, |
191 | { | |
192 | .cmd = TIPC_NL_NAME_TABLE_GET, | |
193 | .dumpit = tipc_nl_name_table_dump, | |
194 | .policy = tipc_nl_policy, | |
0655f6a8 RA |
195 | } |
196 | }; | |
197 | ||
1a1a143d RA |
198 | int tipc_nlmsg_parse(const struct nlmsghdr *nlh, struct nlattr ***attr) |
199 | { | |
200 | u32 maxattr = tipc_genl_v2_family.maxattr; | |
201 | ||
202 | *attr = tipc_genl_v2_family.attrbuf; | |
203 | if (!*attr) | |
204 | return -EOPNOTSUPP; | |
205 | ||
206 | return nlmsg_parse(nlh, GENL_HDRLEN, *attr, maxattr, tipc_nl_policy); | |
207 | } | |
208 | ||
4323add6 | 209 | int tipc_netlink_start(void) |
b97bf3fd | 210 | { |
acb0a200 | 211 | int res; |
b70e4f45 | 212 | |
c53ed742 | 213 | res = genl_register_family_with_ops(&tipc_genl_family, tipc_genl_ops); |
0655f6a8 RA |
214 | if (res) { |
215 | pr_err("Failed to register legacy interface\n"); | |
216 | return res; | |
217 | } | |
218 | ||
219 | res = genl_register_family_with_ops(&tipc_genl_v2_family, | |
220 | tipc_genl_v2_ops); | |
acb0a200 | 221 | if (res) { |
2cf8aa19 | 222 | pr_err("Failed to register netlink interface\n"); |
acb0a200 MM |
223 | return res; |
224 | } | |
c4307285 | 225 | return 0; |
b97bf3fd PL |
226 | } |
227 | ||
4323add6 | 228 | void tipc_netlink_stop(void) |
b97bf3fd | 229 | { |
acb0a200 | 230 | genl_unregister_family(&tipc_genl_family); |
0655f6a8 | 231 | genl_unregister_family(&tipc_genl_v2_family); |
b97bf3fd | 232 | } |