core.c 4.6 KB
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/*
 * net/tipc/core.c: TIPC module code
 *
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 * Copyright (c) 2003-2006, 2013, Ericsson AB
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 * Copyright (c) 2005-2006, 2010-2013, Wind River Systems
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 * All rights reserved.
 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions are met:
 *
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 * 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.
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 *
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 * 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
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 * POSSIBILITY OF SUCH DAMAGE.
 */

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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

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#include "core.h"
#include "name_table.h"
#include "subscr.h"
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#include "bearer.h"
#include "net.h"
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#include "socket.h"
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#include "bcast.h"
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#include <linux/module.h>
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/* configurable TIPC parameters */
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int tipc_net_id __read_mostly;
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int sysctl_tipc_rmem[3] __read_mostly;	/* min/default/max */
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static int __net_init tipc_init_net(struct net *net)
{
	struct tipc_net *tn = net_generic(net, tipc_net_id);
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	int err;
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	tn->net_id = 4711;
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	tn->own_addr = 0;
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	get_random_bytes(&tn->random, sizeof(int));
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	INIT_LIST_HEAD(&tn->node_list);
	spin_lock_init(&tn->node_list_lock);
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	err = tipc_sk_rht_init(net);
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	if (err)
		goto out_sk_rht;

	err = tipc_nametbl_init(net);
	if (err)
		goto out_nametbl;
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	INIT_LIST_HEAD(&tn->dist_queue);
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	err = tipc_topsrv_start(net);
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	if (err)
		goto out_subscr;
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	err = tipc_bcast_init(net);
	if (err)
		goto out_bclink;

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	return 0;

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out_bclink:
	tipc_bcast_stop(net);
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out_subscr:
	tipc_nametbl_stop(net);
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out_nametbl:
	tipc_sk_rht_destroy(net);
out_sk_rht:
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	return err;
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}

static void __net_exit tipc_exit_net(struct net *net)
{
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	tipc_topsrv_stop(net);
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	tipc_net_stop(net);
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	tipc_bcast_stop(net);
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	tipc_nametbl_stop(net);
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	tipc_sk_rht_destroy(net);
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}

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

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static int __init tipc_init(void)
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{
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	int err;
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	pr_info("Activated (version " TIPC_MOD_VER ")\n");

	sysctl_tipc_rmem[0] = TIPC_CONN_OVERLOAD_LIMIT >> 4 <<
			      TIPC_LOW_IMPORTANCE;
	sysctl_tipc_rmem[1] = TIPC_CONN_OVERLOAD_LIMIT >> 4 <<
			      TIPC_CRITICAL_IMPORTANCE;
	sysctl_tipc_rmem[2] = TIPC_CONN_OVERLOAD_LIMIT;

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

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

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

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

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	err = register_pernet_subsys(&tipc_net_ops);
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	if (err)
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		goto out_pernet;
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	err = tipc_bearer_setup();
	if (err)
		goto out_bearer;

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	pr_info("Started in single node mode\n");
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	return 0;
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out_bearer:
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	unregister_pernet_subsys(&tipc_net_ops);
out_pernet:
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	tipc_unregister_sysctl();
out_sysctl:
	tipc_socket_stop();
out_socket:
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	tipc_netlink_compat_stop();
out_netlink_compat:
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	tipc_netlink_stop();
out_netlink:
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	pr_err("Unable to start in single node mode\n");
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	return err;
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}

static void __exit tipc_exit(void)
{
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	tipc_bearer_cleanup();
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	unregister_pernet_subsys(&tipc_net_ops);
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	tipc_netlink_stop();
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	tipc_netlink_compat_stop();
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	tipc_socket_stop();
	tipc_unregister_sysctl();

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	pr_info("Deactivated\n");
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}

module_init(tipc_init);
module_exit(tipc_exit);

MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication");
MODULE_LICENSE("Dual BSD/GPL");
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MODULE_VERSION(TIPC_MOD_VER);