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