/*
   * net/tipc/core.c: TIPC module code
   *

   * Copyright (c) 2003-2006, 2013, Ericsson AB

   * Copyright (c) 2005-2006, 2010-2013, Wind River Systems

   * All rights reserved.
   *

   * Redistribution and use in source and binary forms, with or without

   * modification, are permitted provided that the following conditions are met:
   *

   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. Neither the names of the copyright holders nor the names of its
   *    contributors may be used to endorse or promote products derived from
   *    this software without specific prior written permission.

   *

   * Alternatively, this software may be distributed under the terms of the
   * GNU General Public License ("GPL") version 2 as published by the Free
   * Software Foundation.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

   * POSSIBILITY OF SUCH DAMAGE.
   */

  #include "core.h"

  #include "name_table.h"
  #include "subscr.h"

  #include "bearer.h"
  #include "net.h"

  #include "socket.h"

  #include "bcast.h"

  #include "node.h"

  #include <linux/module.h>

  /* configurable TIPC parameters */

  unsigned int tipc_net_id __read_mostly;

  int sysctl_tipc_rmem[3] __read_mostly;	/* min/default/max */

  static int __net_init tipc_init_net(struct net *net)
  {
  	struct tipc_net *tn = net_generic(net, tipc_net_id);

  	int err;

  
  	tn->net_id = 4711;

  	tn->node_addr = 0;

  	tn->trial_addr = 0;
  	tn->addr_trial_end = 0;

  	tn->capabilities = TIPC_NODE_CAPABILITIES;

  	memset(tn->node_id, 0, sizeof(tn->node_id));
  	memset(tn->node_id_string, 0, sizeof(tn->node_id_string));

  	tn->mon_threshold = TIPC_DEF_MON_THRESHOLD;

  	get_random_bytes(&tn->random, sizeof(int));

  	INIT_LIST_HEAD(&tn->node_list);
  	spin_lock_init(&tn->node_list_lock);

  	err = tipc_sk_rht_init(net);

  	if (err)
  		goto out_sk_rht;
  
  	err = tipc_nametbl_init(net);
  	if (err)
  		goto out_nametbl;

  	INIT_LIST_HEAD(&tn->dist_queue);

  
  	err = tipc_bcast_init(net);
  	if (err)
  		goto out_bclink;

  	err = tipc_attach_loopback(net);
  	if (err)
  		goto out_bclink;

  	return 0;

  out_bclink:

  	tipc_nametbl_stop(net);

  out_nametbl:
  	tipc_sk_rht_destroy(net);
  out_sk_rht:

  	return err;

  }
  
  static void __net_exit tipc_exit_net(struct net *net)
  {

  	tipc_detach_loopback(net);

  	tipc_net_stop(net);

  	tipc_bcast_stop(net);

  	tipc_nametbl_stop(net);

  	tipc_sk_rht_destroy(net);

  }
  
  static struct pernet_operations tipc_net_ops = {
  	.init = tipc_init_net,
  	.exit = tipc_exit_net,
  	.id   = &tipc_net_id,
  	.size = sizeof(struct tipc_net),
  };

  static struct pernet_operations tipc_topsrv_net_ops = {
  	.init = tipc_topsrv_init_net,
  	.exit = tipc_topsrv_exit_net,
  };

  static int __init tipc_init(void)

  {

  	int err;

  	pr_info("Activated (version " TIPC_MOD_VER ")
  ");

  	sysctl_tipc_rmem[0] = RCVBUF_MIN;
  	sysctl_tipc_rmem[1] = RCVBUF_DEF;
  	sysctl_tipc_rmem[2] = RCVBUF_MAX;

  	err = tipc_register_sysctl();
  	if (err)
  		goto out_sysctl;

  	err = register_pernet_device(&tipc_net_ops);

  	if (err)

  		goto out_pernet;

  	err = tipc_socket_init();
  	if (err)
  		goto out_socket;

  	err = register_pernet_device(&tipc_topsrv_net_ops);

  	if (err)
  		goto out_pernet_topsrv;

  	err = tipc_bearer_setup();
  	if (err)
  		goto out_bearer;

  	err = tipc_netlink_start();
  	if (err)
  		goto out_netlink;
  
  	err = tipc_netlink_compat_start();
  	if (err)
  		goto out_netlink_compat;

  	pr_info("Started in single node mode
  ");

  	return 0;

  
  out_netlink_compat:
  	tipc_netlink_stop();
  out_netlink:
  	tipc_bearer_cleanup();

  out_bearer:

  	unregister_pernet_device(&tipc_topsrv_net_ops);

  out_pernet_topsrv:

  	tipc_socket_stop();
  out_socket:

  	unregister_pernet_device(&tipc_net_ops);

  out_pernet:

  	tipc_unregister_sysctl();
  out_sysctl:

  	pr_err("Unable to start in single node mode
  ");

  	return err;

  }

  static void __exit tipc_exit(void)
  {

  	tipc_netlink_compat_stop();
  	tipc_netlink_stop();

  	tipc_bearer_cleanup();

  	unregister_pernet_device(&tipc_topsrv_net_ops);

  	tipc_socket_stop();

  	unregister_pernet_device(&tipc_net_ops);

  	tipc_unregister_sysctl();

  	pr_info("Deactivated
  ");

  }
  
  module_init(tipc_init);
  module_exit(tipc_exit);
  
  MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication");
  MODULE_LICENSE("Dual BSD/GPL");

  MODULE_VERSION(TIPC_MOD_VER);