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