Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1 | /* |
| 2 | * net/tipc/netlink.c: TIPC configuration handling |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 3 | * |
Richard Alpe | 0655f6a | 2014-11-20 10:29:07 +0100 | [diff] [blame] | 4 | * Copyright (c) 2005-2006, 2014, Ericsson AB |
Allan Stephens | 59f0c45 | 2008-05-21 14:52:30 -0700 | [diff] [blame] | 5 | * Copyright (c) 2005-2007, Wind River Systems |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 6 | * All rights reserved. |
| 7 | * |
Per Liden | 9ea1fd3 | 2006-01-11 13:30:43 +0100 | [diff] [blame] | 8 | * Redistribution and use in source and binary forms, with or without |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 9 | * modification, are permitted provided that the following conditions are met: |
| 10 | * |
Per Liden | 9ea1fd3 | 2006-01-11 13:30:43 +0100 | [diff] [blame] | 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. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 19 | * |
Per Liden | 9ea1fd3 | 2006-01-11 13:30:43 +0100 | [diff] [blame] | 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 |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 34 | * POSSIBILITY OF SUCH DAMAGE. |
| 35 | */ |
| 36 | |
| 37 | #include "core.h" |
| 38 | #include "config.h" |
Richard Alpe | 34b78a12 | 2014-11-20 10:29:10 +0100 | [diff] [blame] | 39 | #include "socket.h" |
Richard Alpe | 1593123 | 2014-11-20 10:29:20 +0100 | [diff] [blame] | 40 | #include "name_table.h" |
Richard Alpe | 0655f6a | 2014-11-20 10:29:07 +0100 | [diff] [blame] | 41 | #include "bearer.h" |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 42 | #include "link.h" |
Richard Alpe | 3e4b6ab | 2014-11-20 10:29:17 +0100 | [diff] [blame] | 43 | #include "node.h" |
Richard Alpe | fd3cf2a | 2014-11-20 10:29:18 +0100 | [diff] [blame] | 44 | #include "net.h" |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 45 | #include <net/genetlink.h> |
| 46 | |
| 47 | static int handle_cmd(struct sk_buff *skb, struct genl_info *info) |
| 48 | { |
Ying Xue | c93d3ba | 2015-01-09 15:27:04 +0800 | [diff] [blame] | 49 | struct net *net = genl_info_net(info); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 50 | struct sk_buff *rep_buf; |
| 51 | struct nlmsghdr *rep_nlh; |
| 52 | struct nlmsghdr *req_nlh = info->nlhdr; |
| 53 | struct tipc_genlmsghdr *req_userhdr = info->userhdr; |
Hong zhi guo | 573ce26 | 2013-03-27 06:47:04 +0000 | [diff] [blame] | 54 | int hdr_space = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN); |
Allan Stephens | 59f0c45 | 2008-05-21 14:52:30 -0700 | [diff] [blame] | 55 | u16 cmd; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 56 | |
Eric W. Biederman | 90f62cf | 2014-04-23 14:29:27 -0700 | [diff] [blame] | 57 | if ((req_userhdr->cmd & 0xC000) && (!netlink_capable(skb, CAP_NET_ADMIN))) |
Allan Stephens | 59f0c45 | 2008-05-21 14:52:30 -0700 | [diff] [blame] | 58 | cmd = TIPC_CMD_NOT_NET_ADMIN; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 59 | else |
Allan Stephens | 59f0c45 | 2008-05-21 14:52:30 -0700 | [diff] [blame] | 60 | cmd = req_userhdr->cmd; |
| 61 | |
Ying Xue | c93d3ba | 2015-01-09 15:27:04 +0800 | [diff] [blame] | 62 | rep_buf = tipc_cfg_do_cmd(net, req_userhdr->dest, cmd, |
| 63 | nlmsg_data(req_nlh) + GENL_HDRLEN + |
| 64 | TIPC_GENL_HDRLEN, |
| 65 | nlmsg_attrlen(req_nlh, GENL_HDRLEN + |
| 66 | TIPC_GENL_HDRLEN), hdr_space); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 67 | |
| 68 | if (rep_buf) { |
| 69 | skb_push(rep_buf, hdr_space); |
Arnaldo Carvalho de Melo | b529ccf | 2007-04-25 19:08:35 -0700 | [diff] [blame] | 70 | rep_nlh = nlmsg_hdr(rep_buf); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 71 | memcpy(rep_nlh, req_nlh, hdr_space); |
| 72 | rep_nlh->nlmsg_len = rep_buf->len; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 73 | genlmsg_unicast(&init_net, rep_buf, NETLINK_CB(skb).portid); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 74 | } |
| 75 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 76 | return 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 77 | } |
| 78 | |
Richard Alpe | 0655f6a | 2014-11-20 10:29:07 +0100 | [diff] [blame] | 79 | static const struct nla_policy tipc_nl_policy[TIPC_NLA_MAX + 1] = { |
| 80 | [TIPC_NLA_UNSPEC] = { .type = NLA_UNSPEC, }, |
| 81 | [TIPC_NLA_BEARER] = { .type = NLA_NESTED, }, |
Richard Alpe | 34b78a12 | 2014-11-20 10:29:10 +0100 | [diff] [blame] | 82 | [TIPC_NLA_SOCK] = { .type = NLA_NESTED, }, |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 83 | [TIPC_NLA_PUBL] = { .type = NLA_NESTED, }, |
| 84 | [TIPC_NLA_LINK] = { .type = NLA_NESTED, }, |
Richard Alpe | 46f15c6 | 2014-11-20 10:29:15 +0100 | [diff] [blame] | 85 | [TIPC_NLA_MEDIA] = { .type = NLA_NESTED, }, |
Richard Alpe | fd3cf2a | 2014-11-20 10:29:18 +0100 | [diff] [blame] | 86 | [TIPC_NLA_NODE] = { .type = NLA_NESTED, }, |
Richard Alpe | 1593123 | 2014-11-20 10:29:20 +0100 | [diff] [blame] | 87 | [TIPC_NLA_NET] = { .type = NLA_NESTED, }, |
| 88 | [TIPC_NLA_NAME_TABLE] = { .type = NLA_NESTED, } |
Richard Alpe | 0655f6a | 2014-11-20 10:29:07 +0100 | [diff] [blame] | 89 | }; |
| 90 | |
| 91 | /* Legacy ASCII API */ |
Michał Mirosław | acb0a20 | 2009-05-21 10:34:05 +0000 | [diff] [blame] | 92 | static struct genl_family tipc_genl_family = { |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 93 | .id = GENL_ID_GENERATE, |
| 94 | .name = TIPC_GENL_NAME, |
| 95 | .version = TIPC_GENL_VERSION, |
| 96 | .hdrsize = TIPC_GENL_HDRLEN, |
| 97 | .maxattr = 0, |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 98 | }; |
| 99 | |
Richard Alpe | 0655f6a | 2014-11-20 10:29:07 +0100 | [diff] [blame] | 100 | /* Legacy ASCII API */ |
Johannes Berg | c53ed74 | 2013-11-19 15:19:31 +0100 | [diff] [blame] | 101 | static struct genl_ops tipc_genl_ops[] = { |
| 102 | { |
| 103 | .cmd = TIPC_GENL_CMD, |
| 104 | .doit = handle_cmd, |
| 105 | }, |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 106 | }; |
| 107 | |
Richard Alpe | 0655f6a | 2014-11-20 10:29:07 +0100 | [diff] [blame] | 108 | /* Users of the legacy API (tipc-config) can't handle that we add operations, |
| 109 | * so we have a separate genl handling for the new API. |
| 110 | */ |
| 111 | struct genl_family tipc_genl_v2_family = { |
| 112 | .id = GENL_ID_GENERATE, |
| 113 | .name = TIPC_GENL_V2_NAME, |
| 114 | .version = TIPC_GENL_V2_VERSION, |
| 115 | .hdrsize = 0, |
| 116 | .maxattr = TIPC_NLA_MAX, |
| 117 | }; |
| 118 | |
| 119 | static const struct genl_ops tipc_genl_v2_ops[] = { |
| 120 | { |
| 121 | .cmd = TIPC_NL_BEARER_DISABLE, |
| 122 | .doit = tipc_nl_bearer_disable, |
| 123 | .policy = tipc_nl_policy, |
| 124 | }, |
| 125 | { |
| 126 | .cmd = TIPC_NL_BEARER_ENABLE, |
| 127 | .doit = tipc_nl_bearer_enable, |
| 128 | .policy = tipc_nl_policy, |
Richard Alpe | 35b9dd7 | 2014-11-20 10:29:08 +0100 | [diff] [blame] | 129 | }, |
| 130 | { |
| 131 | .cmd = TIPC_NL_BEARER_GET, |
| 132 | .doit = tipc_nl_bearer_get, |
| 133 | .dumpit = tipc_nl_bearer_dump, |
| 134 | .policy = tipc_nl_policy, |
Richard Alpe | 315c00b | 2014-11-20 10:29:09 +0100 | [diff] [blame] | 135 | }, |
| 136 | { |
| 137 | .cmd = TIPC_NL_BEARER_SET, |
| 138 | .doit = tipc_nl_bearer_set, |
| 139 | .policy = tipc_nl_policy, |
Richard Alpe | 34b78a12 | 2014-11-20 10:29:10 +0100 | [diff] [blame] | 140 | }, |
| 141 | { |
| 142 | .cmd = TIPC_NL_SOCK_GET, |
| 143 | .dumpit = tipc_nl_sk_dump, |
| 144 | .policy = tipc_nl_policy, |
Richard Alpe | 1a1a143 | 2014-11-20 10:29:11 +0100 | [diff] [blame] | 145 | }, |
| 146 | { |
| 147 | .cmd = TIPC_NL_PUBL_GET, |
| 148 | .dumpit = tipc_nl_publ_dump, |
| 149 | .policy = tipc_nl_policy, |
Richard Alpe | 7be57fc | 2014-11-20 10:29:12 +0100 | [diff] [blame] | 150 | }, |
| 151 | { |
| 152 | .cmd = TIPC_NL_LINK_GET, |
| 153 | .doit = tipc_nl_link_get, |
| 154 | .dumpit = tipc_nl_link_dump, |
| 155 | .policy = tipc_nl_policy, |
Richard Alpe | f96ce7a | 2014-11-20 10:29:13 +0100 | [diff] [blame] | 156 | }, |
| 157 | { |
| 158 | .cmd = TIPC_NL_LINK_SET, |
| 159 | .doit = tipc_nl_link_set, |
| 160 | .policy = tipc_nl_policy, |
Richard Alpe | ae36342 | 2014-11-20 10:29:14 +0100 | [diff] [blame] | 161 | }, |
| 162 | { |
| 163 | .cmd = TIPC_NL_LINK_RESET_STATS, |
| 164 | .doit = tipc_nl_link_reset_stats, |
| 165 | .policy = tipc_nl_policy, |
Richard Alpe | 46f15c6 | 2014-11-20 10:29:15 +0100 | [diff] [blame] | 166 | }, |
| 167 | { |
| 168 | .cmd = TIPC_NL_MEDIA_GET, |
| 169 | .doit = tipc_nl_media_get, |
| 170 | .dumpit = tipc_nl_media_dump, |
| 171 | .policy = tipc_nl_policy, |
Richard Alpe | 1e55417 | 2014-11-20 10:29:16 +0100 | [diff] [blame] | 172 | }, |
| 173 | { |
| 174 | .cmd = TIPC_NL_MEDIA_SET, |
| 175 | .doit = tipc_nl_media_set, |
| 176 | .policy = tipc_nl_policy, |
Richard Alpe | 3e4b6ab | 2014-11-20 10:29:17 +0100 | [diff] [blame] | 177 | }, |
| 178 | { |
| 179 | .cmd = TIPC_NL_NODE_GET, |
| 180 | .dumpit = tipc_nl_node_dump, |
| 181 | .policy = tipc_nl_policy, |
Richard Alpe | fd3cf2a | 2014-11-20 10:29:18 +0100 | [diff] [blame] | 182 | }, |
| 183 | { |
| 184 | .cmd = TIPC_NL_NET_GET, |
| 185 | .dumpit = tipc_nl_net_dump, |
| 186 | .policy = tipc_nl_policy, |
Richard Alpe | 27c2141 | 2014-11-20 10:29:19 +0100 | [diff] [blame] | 187 | }, |
| 188 | { |
| 189 | .cmd = TIPC_NL_NET_SET, |
| 190 | .doit = tipc_nl_net_set, |
| 191 | .policy = tipc_nl_policy, |
Richard Alpe | 1593123 | 2014-11-20 10:29:20 +0100 | [diff] [blame] | 192 | }, |
| 193 | { |
| 194 | .cmd = TIPC_NL_NAME_TABLE_GET, |
| 195 | .dumpit = tipc_nl_name_table_dump, |
| 196 | .policy = tipc_nl_policy, |
Richard Alpe | 0655f6a | 2014-11-20 10:29:07 +0100 | [diff] [blame] | 197 | } |
| 198 | }; |
| 199 | |
Richard Alpe | 1a1a143 | 2014-11-20 10:29:11 +0100 | [diff] [blame] | 200 | int tipc_nlmsg_parse(const struct nlmsghdr *nlh, struct nlattr ***attr) |
| 201 | { |
| 202 | u32 maxattr = tipc_genl_v2_family.maxattr; |
| 203 | |
| 204 | *attr = tipc_genl_v2_family.attrbuf; |
| 205 | if (!*attr) |
| 206 | return -EOPNOTSUPP; |
| 207 | |
| 208 | return nlmsg_parse(nlh, GENL_HDRLEN, *attr, maxattr, tipc_nl_policy); |
| 209 | } |
| 210 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 211 | int tipc_netlink_start(void) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 212 | { |
Michał Mirosław | acb0a20 | 2009-05-21 10:34:05 +0000 | [diff] [blame] | 213 | int res; |
Jon Maloy | b70e4f4 | 2006-01-10 18:54:24 +0000 | [diff] [blame] | 214 | |
Johannes Berg | c53ed74 | 2013-11-19 15:19:31 +0100 | [diff] [blame] | 215 | res = genl_register_family_with_ops(&tipc_genl_family, tipc_genl_ops); |
Michał Mirosław | acb0a20 | 2009-05-21 10:34:05 +0000 | [diff] [blame] | 216 | if (res) { |
Richard Alpe | 0655f6a | 2014-11-20 10:29:07 +0100 | [diff] [blame] | 217 | pr_err("Failed to register legacy interface\n"); |
| 218 | return res; |
| 219 | } |
| 220 | |
| 221 | res = genl_register_family_with_ops(&tipc_genl_v2_family, |
| 222 | tipc_genl_v2_ops); |
| 223 | if (res) { |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 224 | pr_err("Failed to register netlink interface\n"); |
Michał Mirosław | acb0a20 | 2009-05-21 10:34:05 +0000 | [diff] [blame] | 225 | return res; |
| 226 | } |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 227 | return 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 228 | } |
| 229 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 230 | void tipc_netlink_stop(void) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 231 | { |
Michał Mirosław | acb0a20 | 2009-05-21 10:34:05 +0000 | [diff] [blame] | 232 | genl_unregister_family(&tipc_genl_family); |
Richard Alpe | 0655f6a | 2014-11-20 10:29:07 +0100 | [diff] [blame] | 233 | genl_unregister_family(&tipc_genl_v2_family); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 234 | } |