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 <net/genetlink.h>
  45
  46static 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/* Users of the legacy API (tipc-config) can't handle that we add operations,
  59 * so we have a separate genl handling for the new API.
  60 */
  61struct genl_family tipc_genl_family = {
  62        .id             = GENL_ID_GENERATE,
  63        .name           = TIPC_GENL_V2_NAME,
  64        .version        = TIPC_GENL_V2_VERSION,
  65        .hdrsize        = 0,
  66        .maxattr        = TIPC_NLA_MAX,
  67        .netnsok        = true,
  68};
  69
  70static const struct genl_ops tipc_genl_v2_ops[] = {
  71        {
  72                .cmd    = TIPC_NL_BEARER_DISABLE,
  73                .doit   = tipc_nl_bearer_disable,
  74                .policy = tipc_nl_policy,
  75        },
  76        {
  77                .cmd    = TIPC_NL_BEARER_ENABLE,
  78                .doit   = tipc_nl_bearer_enable,
  79                .policy = tipc_nl_policy,
  80        },
  81        {
  82                .cmd    = TIPC_NL_BEARER_GET,
  83                .doit   = tipc_nl_bearer_get,
  84                .dumpit = tipc_nl_bearer_dump,
  85                .policy = tipc_nl_policy,
  86        },
  87        {
  88                .cmd    = TIPC_NL_BEARER_SET,
  89                .doit   = tipc_nl_bearer_set,
  90                .policy = tipc_nl_policy,
  91        },
  92        {
  93                .cmd    = TIPC_NL_SOCK_GET,
  94                .dumpit = tipc_nl_sk_dump,
  95                .policy = tipc_nl_policy,
  96        },
  97        {
  98                .cmd    = TIPC_NL_PUBL_GET,
  99                .dumpit = tipc_nl_publ_dump,
 100                .policy = tipc_nl_policy,
 101        },
 102        {
 103                .cmd    = TIPC_NL_LINK_GET,
 104                .doit   = tipc_nl_link_get,
 105                .dumpit = tipc_nl_link_dump,
 106                .policy = tipc_nl_policy,
 107        },
 108        {
 109                .cmd    = TIPC_NL_LINK_SET,
 110                .doit   = tipc_nl_link_set,
 111                .policy = tipc_nl_policy,
 112        },
 113        {
 114                .cmd    = TIPC_NL_LINK_RESET_STATS,
 115                .doit   = tipc_nl_link_reset_stats,
 116                .policy = tipc_nl_policy,
 117        },
 118        {
 119                .cmd    = TIPC_NL_MEDIA_GET,
 120                .doit   = tipc_nl_media_get,
 121                .dumpit = tipc_nl_media_dump,
 122                .policy = tipc_nl_policy,
 123        },
 124        {
 125                .cmd    = TIPC_NL_MEDIA_SET,
 126                .doit   = tipc_nl_media_set,
 127                .policy = tipc_nl_policy,
 128        },
 129        {
 130                .cmd    = TIPC_NL_NODE_GET,
 131                .dumpit = tipc_nl_node_dump,
 132                .policy = tipc_nl_policy,
 133        },
 134        {
 135                .cmd    = TIPC_NL_NET_GET,
 136                .dumpit = tipc_nl_net_dump,
 137                .policy = tipc_nl_policy,
 138        },
 139        {
 140                .cmd    = TIPC_NL_NET_SET,
 141                .doit   = tipc_nl_net_set,
 142                .policy = tipc_nl_policy,
 143        },
 144        {
 145                .cmd    = TIPC_NL_NAME_TABLE_GET,
 146                .dumpit = tipc_nl_name_table_dump,
 147                .policy = tipc_nl_policy,
 148        }
 149};
 150
 151int tipc_nlmsg_parse(const struct nlmsghdr *nlh, struct nlattr ***attr)
 152{
 153        u32 maxattr = tipc_genl_family.maxattr;
 154
 155        *attr = tipc_genl_family.attrbuf;
 156        if (!*attr)
 157                return -EOPNOTSUPP;
 158
 159        return nlmsg_parse(nlh, GENL_HDRLEN, *attr, maxattr, tipc_nl_policy);
 160}
 161
 162int tipc_netlink_start(void)
 163{
 164        int res;
 165
 166        res = genl_register_family_with_ops(&tipc_genl_family,
 167                                            tipc_genl_v2_ops);
 168        if (res) {
 169                pr_err("Failed to register netlink interface\n");
 170                return res;
 171        }
 172        return 0;
 173}
 174
 175void tipc_netlink_stop(void)
 176{
 177        genl_unregister_family(&tipc_genl_family);
 178}
 179