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