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 }; 84 85 const 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 99 const 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 */ 106 const 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 }; 112 113 const 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 }; 120 121 const 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 }; 126 127 const 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 */ 138 struct genl_family tipc_genl_family = { 139 .id = GENL_ID_GENERATE, 140 .name = TIPC_GENL_V2_NAME, 141 .version = TIPC_GENL_V2_VERSION, 142 .hdrsize = 0, 143 .maxattr = TIPC_NLA_MAX, 144 .netnsok = true, 145 }; 146 147 static const struct genl_ops tipc_genl_v2_ops[] = { 148 { 149 .cmd = TIPC_NL_BEARER_DISABLE, 150 .doit = tipc_nl_bearer_disable, 151 .policy = tipc_nl_policy, 152 }, 153 { 154 .cmd = TIPC_NL_BEARER_ENABLE, 155 .doit = tipc_nl_bearer_enable, 156 .policy = tipc_nl_policy, 157 }, 158 { 159 .cmd = TIPC_NL_BEARER_GET, 160 .doit = tipc_nl_bearer_get, 161 .dumpit = tipc_nl_bearer_dump, 162 .policy = tipc_nl_policy, 163 }, 164 { 165 .cmd = TIPC_NL_BEARER_ADD, 166 .doit = tipc_nl_bearer_add, 167 .policy = tipc_nl_policy, 168 }, 169 { 170 .cmd = TIPC_NL_BEARER_SET, 171 .doit = tipc_nl_bearer_set, 172 .policy = tipc_nl_policy, 173 }, 174 { 175 .cmd = TIPC_NL_SOCK_GET, 176 .dumpit = tipc_nl_sk_dump, 177 .policy = tipc_nl_policy, 178 }, 179 { 180 .cmd = TIPC_NL_PUBL_GET, 181 .dumpit = tipc_nl_publ_dump, 182 .policy = tipc_nl_policy, 183 }, 184 { 185 .cmd = TIPC_NL_LINK_GET, 186 .doit = tipc_nl_node_get_link, 187 .dumpit = tipc_nl_node_dump_link, 188 .policy = tipc_nl_policy, 189 }, 190 { 191 .cmd = TIPC_NL_LINK_SET, 192 .doit = tipc_nl_node_set_link, 193 .policy = tipc_nl_policy, 194 }, 195 { 196 .cmd = TIPC_NL_LINK_RESET_STATS, 197 .doit = tipc_nl_node_reset_link_stats, 198 .policy = tipc_nl_policy, 199 }, 200 { 201 .cmd = TIPC_NL_MEDIA_GET, 202 .doit = tipc_nl_media_get, 203 .dumpit = tipc_nl_media_dump, 204 .policy = tipc_nl_policy, 205 }, 206 { 207 .cmd = TIPC_NL_MEDIA_SET, 208 .doit = tipc_nl_media_set, 209 .policy = tipc_nl_policy, 210 }, 211 { 212 .cmd = TIPC_NL_NODE_GET, 213 .dumpit = tipc_nl_node_dump, 214 .policy = tipc_nl_policy, 215 }, 216 { 217 .cmd = TIPC_NL_NET_GET, 218 .dumpit = tipc_nl_net_dump, 219 .policy = tipc_nl_policy, 220 }, 221 { 222 .cmd = TIPC_NL_NET_SET, 223 .doit = tipc_nl_net_set, 224 .policy = tipc_nl_policy, 225 }, 226 { 227 .cmd = TIPC_NL_NAME_TABLE_GET, 228 .dumpit = tipc_nl_name_table_dump, 229 .policy = tipc_nl_policy, 230 }, 231 { 232 .cmd = TIPC_NL_MON_SET, 233 .doit = tipc_nl_node_set_monitor, 234 .policy = tipc_nl_policy, 235 }, 236 { 237 .cmd = TIPC_NL_MON_GET, 238 .doit = tipc_nl_node_get_monitor, 239 .dumpit = tipc_nl_node_dump_monitor, 240 .policy = tipc_nl_policy, 241 }, 242 { 243 .cmd = TIPC_NL_MON_PEER_GET, 244 .dumpit = tipc_nl_node_dump_monitor_peer, 245 .policy = tipc_nl_policy, 246 }, 247 { 248 .cmd = TIPC_NL_PEER_REMOVE, 249 .doit = tipc_nl_peer_rm, 250 .policy = tipc_nl_policy, 251 }, 252 #ifdef CONFIG_TIPC_MEDIA_UDP 253 { 254 .cmd = TIPC_NL_UDP_GET_REMOTEIP, 255 .dumpit = tipc_udp_nl_dump_remoteip, 256 .policy = tipc_nl_policy, 257 }, 258 #endif 259 }; 260 261 int tipc_nlmsg_parse(const struct nlmsghdr *nlh, struct nlattr ***attr) 262 { 263 u32 maxattr = tipc_genl_family.maxattr; 264 265 *attr = tipc_genl_family.attrbuf; 266 if (!*attr) 267 return -EOPNOTSUPP; 268 269 return nlmsg_parse(nlh, GENL_HDRLEN, *attr, maxattr, tipc_nl_policy); 270 } 271 272 int tipc_netlink_start(void) 273 { 274 int res; 275 276 res = genl_register_family_with_ops(&tipc_genl_family, 277 tipc_genl_v2_ops); 278 if (res) { 279 pr_err("Failed to register netlink interface\n"); 280 return res; 281 } 282 return 0; 283 } 284 285 void tipc_netlink_stop(void) 286 { 287 genl_unregister_family(&tipc_genl_family); 288 } 289