LXR linux/net/tipc/core.c

   1/*
   2 * net/tipc/core.c: TIPC module code
   3 *
   4 * Copyright (c) 2003-2006, 2013, Ericsson AB
   5 * Copyright (c) 2005-2006, 2010-2013, 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 "name_table.h"
  39#include "subscr.h"
  40#include "bearer.h"
  41#include "net.h"
  42#include "socket.h"
  43#include "bcast.h"
  44#include "node.h"
  45#include "crypto.h"
  46
  47#include <linux/module.h>
  48
  49/* configurable TIPC parameters */
  50unsigned int tipc_net_id __read_mostly;
  51int sysctl_tipc_rmem[3] __read_mostly;  /* min/default/max */
  52
  53static int __net_init tipc_init_net(struct net *net)
  54{
  55        struct tipc_net *tn = net_generic(net, tipc_net_id);
  56        int err;
  57
  58        tn->net_id = 4711;
  59        tn->node_addr = 0;
  60        tn->trial_addr = 0;
  61        tn->addr_trial_end = 0;
  62        tn->capabilities = TIPC_NODE_CAPABILITIES;
  63        memset(tn->node_id, 0, sizeof(tn->node_id));
  64        memset(tn->node_id_string, 0, sizeof(tn->node_id_string));
  65        tn->mon_threshold = TIPC_DEF_MON_THRESHOLD;
  66        get_random_bytes(&tn->random, sizeof(int));
  67        INIT_LIST_HEAD(&tn->node_list);
  68        spin_lock_init(&tn->node_list_lock);
  69
  70#ifdef CONFIG_TIPC_CRYPTO
  71        err = tipc_crypto_start(&tn->crypto_tx, net, NULL);
  72        if (err)
  73                goto out_crypto;
  74#endif
  75        err = tipc_sk_rht_init(net);
  76        if (err)
  77                goto out_sk_rht;
  78
  79        err = tipc_nametbl_init(net);
  80        if (err)
  81                goto out_nametbl;
  82
  83        INIT_LIST_HEAD(&tn->dist_queue);
  84
  85        err = tipc_bcast_init(net);
  86        if (err)
  87                goto out_bclink;
  88
  89        err = tipc_attach_loopback(net);
  90        if (err)
  91                goto out_bclink;
  92
  93        return 0;
  94
  95out_bclink:
  96        tipc_nametbl_stop(net);
  97out_nametbl:
  98        tipc_sk_rht_destroy(net);
  99out_sk_rht:
 100
 101#ifdef CONFIG_TIPC_CRYPTO
 102        tipc_crypto_stop(&tn->crypto_tx);
 103out_crypto:
 104#endif
 105        return err;
 106}
 107
 108static void __net_exit tipc_exit_net(struct net *net)
 109{
 110        tipc_detach_loopback(net);
 111        tipc_net_stop(net);
 112        tipc_bcast_stop(net);
 113        tipc_nametbl_stop(net);
 114        tipc_sk_rht_destroy(net);
 115#ifdef CONFIG_TIPC_CRYPTO
 116        tipc_crypto_stop(&tipc_net(net)->crypto_tx);
 117#endif
 118}
 119
 120static void __net_exit tipc_pernet_pre_exit(struct net *net)
 121{
 122        tipc_node_pre_cleanup_net(net);
 123}
 124
 125static struct pernet_operations tipc_pernet_pre_exit_ops = {
 126        .pre_exit = tipc_pernet_pre_exit,
 127};
 128
 129static struct pernet_operations tipc_net_ops = {
 130        .init = tipc_init_net,
 131        .exit = tipc_exit_net,
 132        .id   = &tipc_net_id,
 133        .size = sizeof(struct tipc_net),
 134};
 135
 136static struct pernet_operations tipc_topsrv_net_ops = {
 137        .init = tipc_topsrv_init_net,
 138        .exit = tipc_topsrv_exit_net,
 139};
 140
 141static int __init tipc_init(void)
 142{
 143        int err;
 144
 145        pr_info("Activated (version " TIPC_MOD_VER ")\n");
 146
 147        sysctl_tipc_rmem[0] = RCVBUF_MIN;
 148        sysctl_tipc_rmem[1] = RCVBUF_DEF;
 149        sysctl_tipc_rmem[2] = RCVBUF_MAX;
 150
 151        err = tipc_register_sysctl();
 152        if (err)
 153                goto out_sysctl;
 154
 155        err = register_pernet_device(&tipc_net_ops);
 156        if (err)
 157                goto out_pernet;
 158
 159        err = tipc_socket_init();
 160        if (err)
 161                goto out_socket;
 162
 163        err = register_pernet_device(&tipc_topsrv_net_ops);
 164        if (err)
 165                goto out_pernet_topsrv;
 166
 167        err = register_pernet_subsys(&tipc_pernet_pre_exit_ops);
 168        if (err)
 169                goto out_register_pernet_subsys;
 170
 171        err = tipc_bearer_setup();
 172        if (err)
 173                goto out_bearer;
 174
 175        err = tipc_netlink_start();
 176        if (err)
 177                goto out_netlink;
 178
 179        err = tipc_netlink_compat_start();
 180        if (err)
 181                goto out_netlink_compat;
 182
 183        pr_info("Started in single node mode\n");
 184        return 0;
 185
 186out_netlink_compat:
 187        tipc_netlink_stop();
 188out_netlink:
 189        tipc_bearer_cleanup();
 190out_bearer:
 191        unregister_pernet_subsys(&tipc_pernet_pre_exit_ops);
 192out_register_pernet_subsys:
 193        unregister_pernet_device(&tipc_topsrv_net_ops);
 194out_pernet_topsrv:
 195        tipc_socket_stop();
 196out_socket:
 197        unregister_pernet_device(&tipc_net_ops);
 198out_pernet:
 199        tipc_unregister_sysctl();
 200out_sysctl:
 201        pr_err("Unable to start in single node mode\n");
 202        return err;
 203}
 204
 205static void __exit tipc_exit(void)
 206{
 207        tipc_netlink_compat_stop();
 208        tipc_netlink_stop();
 209        tipc_bearer_cleanup();
 210        unregister_pernet_subsys(&tipc_pernet_pre_exit_ops);
 211        unregister_pernet_device(&tipc_topsrv_net_ops);
 212        tipc_socket_stop();
 213        unregister_pernet_device(&tipc_net_ops);
 214        tipc_unregister_sysctl();
 215
 216        pr_info("Deactivated\n");
 217}
 218
 219module_init(tipc_init);
 220module_exit(tipc_exit);
 221
 222MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication");
 223MODULE_LICENSE("Dual BSD/GPL");
 224MODULE_VERSION(TIPC_MOD_VER);
 225