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 <net/genetlink.h> 45 46 static const struct nla_policy tipc_nl_policy[TIPC_NLA_MAX + 1] = { 47 [TIPC_NLA_UNSPEC] = { .type = NLA_UNSPEC, }, 48 [TIPC_NLA_BEARER] = { .type = NLA_NESTED, }, 49 [TIPC_NLA_SOCK] = { .type = NLA_NESTED, }, 50 [TIPC_NLA_PUBL] = { .type = NLA_NESTED, }, 51 [TIPC_NLA_LINK] = { .type = NLA_NESTED, }, 52 [TIPC_NLA_MEDIA] = { .type = NLA_NESTED, }, 53 [TIPC_NLA_NODE] = { .type = NLA_NESTED, }, 54 [TIPC_NLA_NET] = { .type = NLA_NESTED, }, 55 [TIPC_NLA_NAME_TABLE] = { .type = NLA_NESTED, }, 56 [TIPC_NLA_MON] = { .type = NLA_NESTED, }, 57 }; 58 59 const struct nla_policy 60 tipc_nl_name_table_policy[TIPC_NLA_NAME_TABLE_MAX + 1] = { 61 [TIPC_NLA_NAME_TABLE_UNSPEC] = { .type = NLA_UNSPEC }, 62 [TIPC_NLA_NAME_TABLE_PUBL] = { .type = NLA_NESTED } 63 }; 64 65 const struct nla_policy tipc_nl_monitor_policy[TIPC_NLA_MON_MAX + 1] = { 66 [TIPC_NLA_MON_UNSPEC] = { .type = NLA_UNSPEC }, 67 [TIPC_NLA_MON_REF] = { .type = NLA_U32 }, 68 [TIPC_NLA_MON_ACTIVATION_THRESHOLD] = { .type = NLA_U32 }, 69 }; 70 71 const struct nla_policy tipc_nl_sock_policy[TIPC_NLA_SOCK_MAX + 1] = { 72 [TIPC_NLA_SOCK_UNSPEC] = { .type = NLA_UNSPEC }, 73 [TIPC_NLA_SOCK_ADDR] = { .type = NLA_U32 }, 74 [TIPC_NLA_SOCK_REF] = { .type = NLA_U32 }, 75 [TIPC_NLA_SOCK_CON] = { .type = NLA_NESTED }, 76 [TIPC_NLA_SOCK_HAS_PUBL] = { .type = NLA_FLAG } 77 }; 78 79 const struct nla_policy tipc_nl_net_policy[TIPC_NLA_NET_MAX + 1] = { 80 [TIPC_NLA_NET_UNSPEC] = { .type = NLA_UNSPEC }, 81 [TIPC_NLA_NET_ID] = { .type = NLA_U32 } 82 }; 83 84 const struct nla_policy tipc_nl_link_policy[TIPC_NLA_LINK_MAX + 1] = { 85 [TIPC_NLA_LINK_UNSPEC] = { .type = NLA_UNSPEC }, 86 [TIPC_NLA_LINK_NAME] = { .type = NLA_STRING, 87 .len = TIPC_MAX_LINK_NAME }, 88 [TIPC_NLA_LINK_MTU] = { .type = NLA_U32 }, 89 [TIPC_NLA_LINK_BROADCAST] = { .type = NLA_FLAG }, 90 [TIPC_NLA_LINK_UP] = { .type = NLA_FLAG }, 91 [TIPC_NLA_LINK_ACTIVE] = { .type = NLA_FLAG }, 92 [TIPC_NLA_LINK_PROP] = { .type = NLA_NESTED }, 93 [TIPC_NLA_LINK_STATS] = { .type = NLA_NESTED }, 94 [TIPC_NLA_LINK_RX] = { .type = NLA_U32 }, 95 [TIPC_NLA_LINK_TX] = { .type = NLA_U32 } 96 }; 97 98 const struct nla_policy tipc_nl_node_policy[TIPC_NLA_NODE_MAX + 1] = { 99 [TIPC_NLA_NODE_UNSPEC] = { .type = NLA_UNSPEC }, 100 [TIPC_NLA_NODE_ADDR] = { .type = NLA_U32 }, 101 [TIPC_NLA_NODE_UP] = { .type = NLA_FLAG } 102 }; 103 104 /* Properties valid for media, bearer and link */ 105 const struct nla_policy tipc_nl_prop_policy[TIPC_NLA_PROP_MAX + 1] = { 106 [TIPC_NLA_PROP_UNSPEC] = { .type = NLA_UNSPEC }, 107 [TIPC_NLA_PROP_PRIO] = { .type = NLA_U32 }, 108 [TIPC_NLA_PROP_TOL] = { .type = NLA_U32 }, 109 [TIPC_NLA_PROP_WIN] = { .type = NLA_U32 } 110 }; 111 112 const struct nla_policy tipc_nl_bearer_policy[TIPC_NLA_BEARER_MAX + 1] = { 113 [TIPC_NLA_BEARER_UNSPEC] = { .type = NLA_UNSPEC }, 114 [TIPC_NLA_BEARER_NAME] = { .type = NLA_STRING, 115 .len = TIPC_MAX_BEARER_NAME }, 116 [TIPC_NLA_BEARER_PROP] = { .type = NLA_NESTED }, 117 [TIPC_NLA_BEARER_DOMAIN] = { .type = NLA_U32 } 118 }; 119 120 const struct nla_policy tipc_nl_media_policy[TIPC_NLA_MEDIA_MAX + 1] = { 121 [TIPC_NLA_MEDIA_UNSPEC] = { .type = NLA_UNSPEC }, 122 [TIPC_NLA_MEDIA_NAME] = { .type = NLA_STRING }, 123 [TIPC_NLA_MEDIA_PROP] = { .type = NLA_NESTED } 124 }; 125 126 const struct nla_policy tipc_nl_udp_policy[TIPC_NLA_UDP_MAX + 1] = { 127 [TIPC_NLA_UDP_UNSPEC] = {.type = NLA_UNSPEC}, 128 [TIPC_NLA_UDP_LOCAL] = {.type = NLA_BINARY, 129 .len = sizeof(struct sockaddr_storage)}, 130 [TIPC_NLA_UDP_REMOTE] = {.type = NLA_BINARY, 131 .len = sizeof(struct sockaddr_storage)}, 132 }; 133 134 /* Users of the legacy API (tipc-config) can't handle that we add operations, 135 * so we have a separate genl handling for the new API. 136 */ 137 struct genl_family tipc_genl_family = { 138 .id = GENL_ID_GENERATE, 139 .name = TIPC_GENL_V2_NAME, 140 .version = TIPC_GENL_V2_VERSION, 141 .hdrsize = 0, 142 .maxattr = TIPC_NLA_MAX, 143 .netnsok = true, 144 }; 145 146 static const struct genl_ops tipc_genl_v2_ops[] = { 147 { 148 .cmd = TIPC_NL_BEARER_DISABLE, 149 .doit = tipc_nl_bearer_disable, 150 .policy = tipc_nl_policy, 151 }, 152 { 153 .cmd = TIPC_NL_BEARER_ENABLE, 154 .doit = tipc_nl_bearer_enable, 155 .policy = tipc_nl_policy, 156 }, 157 { 158 .cmd = TIPC_NL_BEARER_GET, 159 .doit = tipc_nl_bearer_get, 160 .dumpit = tipc_nl_bearer_dump, 161 .policy = tipc_nl_policy, 162 }, 163 { 164 .cmd = TIPC_NL_BEARER_SET, 165 .doit = tipc_nl_bearer_set, 166 .policy = tipc_nl_policy, 167 }, 168 { 169 .cmd = TIPC_NL_SOCK_GET, 170 .dumpit = tipc_nl_sk_dump, 171 .policy = tipc_nl_policy, 172 }, 173 { 174 .cmd = TIPC_NL_PUBL_GET, 175 .dumpit = tipc_nl_publ_dump, 176 .policy = tipc_nl_policy, 177 }, 178 { 179 .cmd = TIPC_NL_LINK_GET, 180 .doit = tipc_nl_node_get_link, 181 .dumpit = tipc_nl_node_dump_link, 182 .policy = tipc_nl_policy, 183 }, 184 { 185 .cmd = TIPC_NL_LINK_SET, 186 .doit = tipc_nl_node_set_link, 187 .policy = tipc_nl_policy, 188 }, 189 { 190 .cmd = TIPC_NL_LINK_RESET_STATS, 191 .doit = tipc_nl_node_reset_link_stats, 192 .policy = tipc_nl_policy, 193 }, 194 { 195 .cmd = TIPC_NL_MEDIA_GET, 196 .doit = tipc_nl_media_get, 197 .dumpit = tipc_nl_media_dump, 198 .policy = tipc_nl_policy, 199 }, 200 { 201 .cmd = TIPC_NL_MEDIA_SET, 202 .doit = tipc_nl_media_set, 203 .policy = tipc_nl_policy, 204 }, 205 { 206 .cmd = TIPC_NL_NODE_GET, 207 .dumpit = tipc_nl_node_dump, 208 .policy = tipc_nl_policy, 209 }, 210 { 211 .cmd = TIPC_NL_NET_GET, 212 .dumpit = tipc_nl_net_dump, 213 .policy = tipc_nl_policy, 214 }, 215 { 216 .cmd = TIPC_NL_NET_SET, 217 .doit = tipc_nl_net_set, 218 .policy = tipc_nl_policy, 219 }, 220 { 221 .cmd = TIPC_NL_NAME_TABLE_GET, 222 .dumpit = tipc_nl_name_table_dump, 223 .policy = tipc_nl_policy, 224 }, 225 { 226 .cmd = TIPC_NL_MON_SET, 227 .doit = tipc_nl_node_set_monitor, 228 .policy = tipc_nl_policy, 229 }, 230 { 231 .cmd = TIPC_NL_MON_GET, 232 .doit = tipc_nl_node_get_monitor, 233 .dumpit = tipc_nl_node_dump_monitor, 234 .policy = tipc_nl_policy, 235 }, 236 { 237 .cmd = TIPC_NL_MON_PEER_GET, 238 .dumpit = tipc_nl_node_dump_monitor_peer, 239 .policy = tipc_nl_policy, 240 }, 241 }; 242 243 int tipc_nlmsg_parse(const struct nlmsghdr *nlh, struct nlattr ***attr) 244 { 245 u32 maxattr = tipc_genl_family.maxattr; 246 247 *attr = tipc_genl_family.attrbuf; 248 if (!*attr) 249 return -EOPNOTSUPP; 250 251 return nlmsg_parse(nlh, GENL_HDRLEN, *attr, maxattr, tipc_nl_policy); 252 } 253 254 int tipc_netlink_start(void) 255 { 256 int res; 257 258 res = genl_register_family_with_ops(&tipc_genl_family, 259 tipc_genl_v2_ops); 260 if (res) { 261 pr_err("Failed to register netlink interface\n"); 262 return res; 263 } 264 return 0; 265 } 266 267 void tipc_netlink_stop(void) 268 { 269 genl_unregister_family(&tipc_genl_family); 270 } 271