net/tipc/netlink.c

   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         [TIPC_NLA_NODE_ID]              = { .type = NLA_BINARY,
 107                                             .len = TIPC_NODEID_LEN},
 108         [TIPC_NLA_NODE_KEY]             = { .type = NLA_BINARY,
 109                                             .len = TIPC_AEAD_KEY_SIZE_MAX},
 110 };
 111
 112 /* Properties valid for media, bearer and link */
 113 const struct nla_policy tipc_nl_prop_policy[TIPC_NLA_PROP_MAX + 1] = {
 114         [TIPC_NLA_PROP_UNSPEC]          = { .type = NLA_UNSPEC },
 115         [TIPC_NLA_PROP_PRIO]            = { .type = NLA_U32 },
 116         [TIPC_NLA_PROP_TOL]             = { .type = NLA_U32 },
 117         [TIPC_NLA_PROP_WIN]             = { .type = NLA_U32 },
 118         [TIPC_NLA_PROP_BROADCAST]       = { .type = NLA_U32 },
 119         [TIPC_NLA_PROP_BROADCAST_RATIO] = { .type = NLA_U32 }
 120 };
 121
 122 const struct nla_policy tipc_nl_bearer_policy[TIPC_NLA_BEARER_MAX + 1]  = {
 123         [TIPC_NLA_BEARER_UNSPEC]        = { .type = NLA_UNSPEC },
 124         [TIPC_NLA_BEARER_NAME]          = { .type = NLA_STRING,
 125                                             .len = TIPC_MAX_BEARER_NAME },
 126         [TIPC_NLA_BEARER_PROP]          = { .type = NLA_NESTED },
 127         [TIPC_NLA_BEARER_DOMAIN]        = { .type = NLA_U32 }
 128 };
 129
 130 const struct nla_policy tipc_nl_media_policy[TIPC_NLA_MEDIA_MAX + 1] = {
 131         [TIPC_NLA_MEDIA_UNSPEC]         = { .type = NLA_UNSPEC },
 132         [TIPC_NLA_MEDIA_NAME]           = { .type = NLA_STRING },
 133         [TIPC_NLA_MEDIA_PROP]           = { .type = NLA_NESTED }
 134 };
 135
 136 const struct nla_policy tipc_nl_udp_policy[TIPC_NLA_UDP_MAX + 1] = {
 137         [TIPC_NLA_UDP_UNSPEC]   = {.type = NLA_UNSPEC},
 138         [TIPC_NLA_UDP_LOCAL]    = {.type = NLA_BINARY,
 139                                    .len = sizeof(struct sockaddr_storage)},
 140         [TIPC_NLA_UDP_REMOTE]   = {.type = NLA_BINARY,
 141                                    .len = sizeof(struct sockaddr_storage)},
 142 };
 143
 144 /* Users of the legacy API (tipc-config) can't handle that we add operations,
 145  * so we have a separate genl handling for the new API.
 146  */
 147 static const struct genl_ops tipc_genl_v2_ops[] = {
 148         {
 149                 .cmd    = TIPC_NL_BEARER_DISABLE,
 150                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 151                 .doit   = tipc_nl_bearer_disable,
 152         },
 153         {
 154                 .cmd    = TIPC_NL_BEARER_ENABLE,
 155                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 156                 .doit   = tipc_nl_bearer_enable,
 157         },
 158         {
 159                 .cmd    = TIPC_NL_BEARER_GET,
 160                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 161                 .doit   = tipc_nl_bearer_get,
 162                 .dumpit = tipc_nl_bearer_dump,
 163         },
 164         {
 165                 .cmd    = TIPC_NL_BEARER_ADD,
 166                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 167                 .doit   = tipc_nl_bearer_add,
 168         },
 169         {
 170                 .cmd    = TIPC_NL_BEARER_SET,
 171                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 172                 .doit   = tipc_nl_bearer_set,
 173         },
 174         {
 175                 .cmd    = TIPC_NL_SOCK_GET,
 176                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 177                 .start = tipc_dump_start,
 178                 .dumpit = tipc_nl_sk_dump,
 179                 .done   = tipc_dump_done,
 180         },
 181         {
 182                 .cmd    = TIPC_NL_PUBL_GET,
 183                 .validate = GENL_DONT_VALIDATE_STRICT |
 184                             GENL_DONT_VALIDATE_DUMP_STRICT,
 185                 .dumpit = tipc_nl_publ_dump,
 186         },
 187         {
 188                 .cmd    = TIPC_NL_LINK_GET,
 189                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 190                 .doit   = tipc_nl_node_get_link,
 191                 .dumpit = tipc_nl_node_dump_link,
 192         },
 193         {
 194                 .cmd    = TIPC_NL_LINK_SET,
 195                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 196                 .doit   = tipc_nl_node_set_link,
 197         },
 198         {
 199                 .cmd    = TIPC_NL_LINK_RESET_STATS,
 200                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 201                 .doit   = tipc_nl_node_reset_link_stats,
 202         },
 203         {
 204                 .cmd    = TIPC_NL_MEDIA_GET,
 205                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 206                 .doit   = tipc_nl_media_get,
 207                 .dumpit = tipc_nl_media_dump,
 208         },
 209         {
 210                 .cmd    = TIPC_NL_MEDIA_SET,
 211                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 212                 .doit   = tipc_nl_media_set,
 213         },
 214         {
 215                 .cmd    = TIPC_NL_NODE_GET,
 216                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 217                 .dumpit = tipc_nl_node_dump,
 218         },
 219         {
 220                 .cmd    = TIPC_NL_NET_GET,
 221                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 222                 .dumpit = tipc_nl_net_dump,
 223         },
 224         {
 225                 .cmd    = TIPC_NL_NET_SET,
 226                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 227                 .doit   = tipc_nl_net_set,
 228         },
 229         {
 230                 .cmd    = TIPC_NL_NAME_TABLE_GET,
 231                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 232                 .dumpit = tipc_nl_name_table_dump,
 233         },
 234         {
 235                 .cmd    = TIPC_NL_MON_SET,
 236                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 237                 .doit   = tipc_nl_node_set_monitor,
 238         },
 239         {
 240                 .cmd    = TIPC_NL_MON_GET,
 241                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 242                 .doit   = tipc_nl_node_get_monitor,
 243                 .dumpit = tipc_nl_node_dump_monitor,
 244         },
 245         {
 246                 .cmd    = TIPC_NL_MON_PEER_GET,
 247                 .validate = GENL_DONT_VALIDATE_STRICT |
 248                             GENL_DONT_VALIDATE_DUMP_STRICT,
 249                 .dumpit = tipc_nl_node_dump_monitor_peer,
 250         },
 251         {
 252                 .cmd    = TIPC_NL_PEER_REMOVE,
 253                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 254                 .doit   = tipc_nl_peer_rm,
 255         },
 256 #ifdef CONFIG_TIPC_MEDIA_UDP
 257         {
 258                 .cmd    = TIPC_NL_UDP_GET_REMOTEIP,
 259                 .validate = GENL_DONT_VALIDATE_STRICT |
 260                             GENL_DONT_VALIDATE_DUMP_STRICT,
 261                 .dumpit = tipc_udp_nl_dump_remoteip,
 262         },
 263 #endif
 264 #ifdef CONFIG_TIPC_CRYPTO
 265         {
 266                 .cmd    = TIPC_NL_KEY_SET,
 267                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 268                 .doit   = tipc_nl_node_set_key,
 269         },
 270         {
 271                 .cmd    = TIPC_NL_KEY_FLUSH,
 272                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 273                 .doit   = tipc_nl_node_flush_key,
 274         },
 275 #endif
 276 };
 277
 278 struct genl_family tipc_genl_family __ro_after_init = {
 279         .name           = TIPC_GENL_V2_NAME,
 280         .version        = TIPC_GENL_V2_VERSION,
 281         .hdrsize        = 0,
 282         .maxattr        = TIPC_NLA_MAX,
 283         .policy         = tipc_nl_policy,
 284         .netnsok        = true,
 285         .module         = THIS_MODULE,
 286         .ops            = tipc_genl_v2_ops,
 287         .n_ops          = ARRAY_SIZE(tipc_genl_v2_ops),
 288 };
 289
 290 int __init tipc_netlink_start(void)
 291 {
 292         int res;
 293
 294         res = genl_register_family(&tipc_genl_family);
 295         if (res) {
 296                 pr_err("Failed to register netlink interface\n");
 297                 return res;
 298         }
 299         return 0;
 300 }
 301
 302 void tipc_netlink_stop(void)
 303 {
 304         genl_unregister_family(&tipc_genl_family);
 305 }