kernel/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
  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 /* 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  */
  61 struct 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
  70 static 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
 151 int 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
 162 int 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
 175 void tipc_netlink_stop(void)
 176 {
 177         genl_unregister_family(&tipc_genl_family);
 178 }