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