LXR linux/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
  47static 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
  60const struct nla_policy
  61tipc_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
  66const 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
  72const 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
  80const 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        [TIPC_NLA_NET_ADDR_LEGACY]      = { .type = NLA_FLAG }
  87};
  88
  89const struct nla_policy tipc_nl_link_policy[TIPC_NLA_LINK_MAX + 1] = {
  90        [TIPC_NLA_LINK_UNSPEC]          = { .type = NLA_UNSPEC },
  91        [TIPC_NLA_LINK_NAME]            = { .type = NLA_STRING,
  92                                            .len = TIPC_MAX_LINK_NAME },
  93        [TIPC_NLA_LINK_MTU]             = { .type = NLA_U32 },
  94        [TIPC_NLA_LINK_BROADCAST]       = { .type = NLA_FLAG },
  95        [TIPC_NLA_LINK_UP]              = { .type = NLA_FLAG },
  96        [TIPC_NLA_LINK_ACTIVE]          = { .type = NLA_FLAG },
  97        [TIPC_NLA_LINK_PROP]            = { .type = NLA_NESTED },
  98        [TIPC_NLA_LINK_STATS]           = { .type = NLA_NESTED },
  99        [TIPC_NLA_LINK_RX]              = { .type = NLA_U32 },
 100        [TIPC_NLA_LINK_TX]              = { .type = NLA_U32 }
 101};
 102
 103const struct nla_policy tipc_nl_node_policy[TIPC_NLA_NODE_MAX + 1] = {
 104        [TIPC_NLA_NODE_UNSPEC]          = { .type = NLA_UNSPEC },
 105        [TIPC_NLA_NODE_ADDR]            = { .type = NLA_U32 },
 106        [TIPC_NLA_NODE_UP]              = { .type = NLA_FLAG },
 107        [TIPC_NLA_NODE_ID]              = { .type = NLA_BINARY,
 108                                            .len = TIPC_NODEID_LEN},
 109        [TIPC_NLA_NODE_KEY]             = { .type = NLA_BINARY,
 110                                            .len = TIPC_AEAD_KEY_SIZE_MAX},
 111        [TIPC_NLA_NODE_KEY_MASTER]      = { .type = NLA_FLAG },
 112        [TIPC_NLA_NODE_REKEYING]        = { .type = NLA_U32 },
 113};
 114
 115/* Properties valid for media, bearer and link */
 116const struct nla_policy tipc_nl_prop_policy[TIPC_NLA_PROP_MAX + 1] = {
 117        [TIPC_NLA_PROP_UNSPEC]          = { .type = NLA_UNSPEC },
 118        [TIPC_NLA_PROP_PRIO]            = { .type = NLA_U32 },
 119        [TIPC_NLA_PROP_TOL]             = { .type = NLA_U32 },
 120        [TIPC_NLA_PROP_WIN]             = { .type = NLA_U32 },
 121        [TIPC_NLA_PROP_MTU]             = { .type = NLA_U32 },
 122        [TIPC_NLA_PROP_BROADCAST]       = { .type = NLA_U32 },
 123        [TIPC_NLA_PROP_BROADCAST_RATIO] = { .type = NLA_U32 }
 124};
 125
 126const struct nla_policy tipc_nl_bearer_policy[TIPC_NLA_BEARER_MAX + 1]  = {
 127        [TIPC_NLA_BEARER_UNSPEC]        = { .type = NLA_UNSPEC },
 128        [TIPC_NLA_BEARER_NAME]          = { .type = NLA_STRING,
 129                                            .len = TIPC_MAX_BEARER_NAME },
 130        [TIPC_NLA_BEARER_PROP]          = { .type = NLA_NESTED },
 131        [TIPC_NLA_BEARER_DOMAIN]        = { .type = NLA_U32 }
 132};
 133
 134const struct nla_policy tipc_nl_media_policy[TIPC_NLA_MEDIA_MAX + 1] = {
 135        [TIPC_NLA_MEDIA_UNSPEC]         = { .type = NLA_UNSPEC },
 136        [TIPC_NLA_MEDIA_NAME]           = { .type = NLA_STRING },
 137        [TIPC_NLA_MEDIA_PROP]           = { .type = NLA_NESTED }
 138};
 139
 140const struct nla_policy tipc_nl_udp_policy[TIPC_NLA_UDP_MAX + 1] = {
 141        [TIPC_NLA_UDP_UNSPEC]   = {.type = NLA_UNSPEC},
 142        [TIPC_NLA_UDP_LOCAL]    = {.type = NLA_BINARY,
 143                                   .len = sizeof(struct sockaddr_storage)},
 144        [TIPC_NLA_UDP_REMOTE]   = {.type = NLA_BINARY,
 145                                   .len = sizeof(struct sockaddr_storage)},
 146};
 147
 148/* Users of the legacy API (tipc-config) can't handle that we add operations,
 149 * so we have a separate genl handling for the new API.
 150 */
 151static const struct genl_ops tipc_genl_v2_ops[] = {
 152        {
 153                .cmd    = TIPC_NL_BEARER_DISABLE,
 154                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 155                .doit   = tipc_nl_bearer_disable,
 156        },
 157        {
 158                .cmd    = TIPC_NL_BEARER_ENABLE,
 159                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 160                .doit   = tipc_nl_bearer_enable,
 161        },
 162        {
 163                .cmd    = TIPC_NL_BEARER_GET,
 164                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 165                .doit   = tipc_nl_bearer_get,
 166                .dumpit = tipc_nl_bearer_dump,
 167        },
 168        {
 169                .cmd    = TIPC_NL_BEARER_ADD,
 170                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 171                .doit   = tipc_nl_bearer_add,
 172        },
 173        {
 174                .cmd    = TIPC_NL_BEARER_SET,
 175                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 176                .doit   = tipc_nl_bearer_set,
 177        },
 178        {
 179                .cmd    = TIPC_NL_SOCK_GET,
 180                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 181                .start = tipc_dump_start,
 182                .dumpit = tipc_nl_sk_dump,
 183                .done   = tipc_dump_done,
 184        },
 185        {
 186                .cmd    = TIPC_NL_PUBL_GET,
 187                .validate = GENL_DONT_VALIDATE_STRICT |
 188                            GENL_DONT_VALIDATE_DUMP_STRICT,
 189                .dumpit = tipc_nl_publ_dump,
 190        },
 191        {
 192                .cmd    = TIPC_NL_LINK_GET,
 193                .validate = GENL_DONT_VALIDATE_STRICT,
 194                .doit   = tipc_nl_node_get_link,
 195                .dumpit = tipc_nl_node_dump_link,
 196        },
 197        {
 198                .cmd    = TIPC_NL_LINK_SET,
 199                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 200                .doit   = tipc_nl_node_set_link,
 201        },
 202        {
 203                .cmd    = TIPC_NL_LINK_RESET_STATS,
 204                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 205                .doit   = tipc_nl_node_reset_link_stats,
 206        },
 207        {
 208                .cmd    = TIPC_NL_MEDIA_GET,
 209                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 210                .doit   = tipc_nl_media_get,
 211                .dumpit = tipc_nl_media_dump,
 212        },
 213        {
 214                .cmd    = TIPC_NL_MEDIA_SET,
 215                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 216                .doit   = tipc_nl_media_set,
 217        },
 218        {
 219                .cmd    = TIPC_NL_NODE_GET,
 220                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 221                .dumpit = tipc_nl_node_dump,
 222        },
 223        {
 224                .cmd    = TIPC_NL_NET_GET,
 225                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 226                .dumpit = tipc_nl_net_dump,
 227        },
 228        {
 229                .cmd    = TIPC_NL_NET_SET,
 230                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 231                .doit   = tipc_nl_net_set,
 232        },
 233        {
 234                .cmd    = TIPC_NL_NAME_TABLE_GET,
 235                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 236                .dumpit = tipc_nl_name_table_dump,
 237        },
 238        {
 239                .cmd    = TIPC_NL_MON_SET,
 240                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 241                .doit   = tipc_nl_node_set_monitor,
 242        },
 243        {
 244                .cmd    = TIPC_NL_MON_GET,
 245                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 246                .doit   = tipc_nl_node_get_monitor,
 247                .dumpit = tipc_nl_node_dump_monitor,
 248        },
 249        {
 250                .cmd    = TIPC_NL_MON_PEER_GET,
 251                .validate = GENL_DONT_VALIDATE_STRICT |
 252                            GENL_DONT_VALIDATE_DUMP_STRICT,
 253                .dumpit = tipc_nl_node_dump_monitor_peer,
 254        },
 255        {
 256                .cmd    = TIPC_NL_PEER_REMOVE,
 257                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 258                .doit   = tipc_nl_peer_rm,
 259        },
 260#ifdef CONFIG_TIPC_MEDIA_UDP
 261        {
 262                .cmd    = TIPC_NL_UDP_GET_REMOTEIP,
 263                .validate = GENL_DONT_VALIDATE_STRICT |
 264                            GENL_DONT_VALIDATE_DUMP_STRICT,
 265                .dumpit = tipc_udp_nl_dump_remoteip,
 266        },
 267#endif
 268#ifdef CONFIG_TIPC_CRYPTO
 269        {
 270                .cmd    = TIPC_NL_KEY_SET,
 271                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 272                .doit   = tipc_nl_node_set_key,
 273        },
 274        {
 275                .cmd    = TIPC_NL_KEY_FLUSH,
 276                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 277                .doit   = tipc_nl_node_flush_key,
 278        },
 279#endif
 280        {
 281                .cmd    = TIPC_NL_ADDR_LEGACY_GET,
 282                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 283                .doit   = tipc_nl_net_addr_legacy_get,
 284        },
 285};
 286
 287struct genl_family tipc_genl_family __ro_after_init = {
 288        .name           = TIPC_GENL_V2_NAME,
 289        .version        = TIPC_GENL_V2_VERSION,
 290        .hdrsize        = 0,
 291        .maxattr        = TIPC_NLA_MAX,
 292        .policy         = tipc_nl_policy,
 293        .netnsok        = true,
 294        .module         = THIS_MODULE,
 295        .ops            = tipc_genl_v2_ops,
 296        .n_ops          = ARRAY_SIZE(tipc_genl_v2_ops),
 297};
 298
 299int __init tipc_netlink_start(void)
 300{
 301        int res;
 302
 303        res = genl_register_family(&tipc_genl_family);
 304        if (res) {
 305                pr_err("Failed to register netlink interface\n");
 306                return res;
 307        }
 308        return 0;
 309}
 310
 311void tipc_netlink_stop(void)
 312{
 313        genl_unregister_family(&tipc_genl_family);
 314}
 315