/* * 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 "crypto.h" #include <linux/module.h>#include <linux/wait_bit.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;	INIT_WORK(&tn->work, tipc_net_finalize_work);	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); #ifdef CONFIG_TIPC_CRYPTO	err = tipc_crypto_start(&tn->crypto_tx, net, NULL);	if (err)		goto out_crypto;#endif	err = tipc_sk_rht_init(net);	if (err)		goto out_sk_rht; 	err = tipc_nametbl_init(net);	if (err)		goto out_nametbl; 	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: #ifdef CONFIG_TIPC_CRYPTO	tipc_crypto_stop(&tn->crypto_tx);out_crypto:#endif	return err;} static void __net_exit tipc_exit_net(struct net *net){	struct tipc_net *tn = tipc_net(net); 	tipc_detach_loopback(net);	tipc_net_stop(net);	/* Make sure the tipc_net_finalize_work() finished */	cancel_work_sync(&tn->work);	tipc_bcast_stop(net);	tipc_nametbl_stop(net);	tipc_sk_rht_destroy(net);#ifdef CONFIG_TIPC_CRYPTO	tipc_crypto_stop(&tipc_net(net)->crypto_tx);#endif	wait_var_event(&tn->wq_count, atomic_read(&tn->wq_count) == 0);} static void __net_exit tipc_pernet_pre_exit(struct net *net){	tipc_node_pre_cleanup_net(net);} static struct pernet_operations tipc_pernet_pre_exit_ops = {	.pre_exit = tipc_pernet_pre_exit,}; 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 ")\n"); 	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 = register_pernet_subsys(&tipc_pernet_pre_exit_ops);	if (err)		goto out_register_pernet_subsys; 	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\n");	return 0; out_netlink_compat:	tipc_netlink_stop();out_netlink:	tipc_bearer_cleanup();out_bearer:	unregister_pernet_subsys(&tipc_pernet_pre_exit_ops);out_register_pernet_subsys:	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\n");	return err;} static void __exit tipc_exit(void){	tipc_netlink_compat_stop();	tipc_netlink_stop();	tipc_bearer_cleanup();	unregister_pernet_subsys(&tipc_pernet_pre_exit_ops);	unregister_pernet_device(&tipc_topsrv_net_ops);	tipc_socket_stop();	unregister_pernet_device(&tipc_net_ops);	tipc_unregister_sysctl(); 	/* TODO: Wait for all timers that called call_rcu() to finish before	 * calling rcu_barrier().	 */	rcu_barrier(); 	pr_info("Deactivated\n");} 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);