/* * net/tipc/core.c: TIPC module code * * Copyright (c) 2003-2006, Ericsson AB * Copyright (c) 2005, 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 <linux/init.h>#include <linux/module.h>#include <linux/kernel.h>#include <linux/random.h> #include "core.h"#include "dbg.h"#include "ref.h"#include "net.h"#include "user_reg.h"#include "name_table.h"#include "subscr.h"#include "config.h" int  tipc_eth_media_start(void);void tipc_eth_media_stop(void);int  tipc_handler_start(void);void tipc_handler_stop(void);int  tipc_socket_init(void);void tipc_socket_stop(void);int  tipc_netlink_start(void);void tipc_netlink_stop(void); #define MOD_NAME "tipc_start: " #ifndef CONFIG_TIPC_ZONES#define CONFIG_TIPC_ZONES 3#endif #ifndef CONFIG_TIPC_CLUSTERS#define CONFIG_TIPC_CLUSTERS 1#endif #ifndef CONFIG_TIPC_NODES#define CONFIG_TIPC_NODES 255#endif #ifndef CONFIG_TIPC_SLAVE_NODES#define CONFIG_TIPC_SLAVE_NODES 0#endif #ifndef CONFIG_TIPC_PORTS#define CONFIG_TIPC_PORTS 8191#endif #ifndef CONFIG_TIPC_LOG#define CONFIG_TIPC_LOG 0#endif /* global variables used by multiple sub-systems within TIPC */ int tipc_mode = TIPC_NOT_RUNNING;int tipc_random;atomic_t tipc_user_count = ATOMIC_INIT(0); const char tipc_alphabet[] = 	"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_"; /* configurable TIPC parameters */ u32 tipc_own_addr;int tipc_max_zones;int tipc_max_clusters;int tipc_max_nodes;int tipc_max_slaves;int tipc_max_ports;int tipc_max_subscriptions;int tipc_max_publications;int tipc_net_id;int tipc_remote_management;  int tipc_get_mode(void){	return tipc_mode;} /** * tipc_core_stop_net - shut down TIPC networking sub-systems */ void tipc_core_stop_net(void){	tipc_eth_media_stop();	tipc_net_stop();} /** * start_net - start TIPC networking sub-systems */ int tipc_core_start_net(void){	int res; 	if ((res = tipc_net_start()) ||	    (res = tipc_eth_media_start())) {		tipc_core_stop_net();	}	return res;} /** * tipc_core_stop - switch TIPC from SINGLE NODE to NOT RUNNING mode */ void tipc_core_stop(void){	if (tipc_mode != TIPC_NODE_MODE)		return; 	tipc_mode = TIPC_NOT_RUNNING; 	tipc_netlink_stop();	tipc_handler_stop();	tipc_cfg_stop();	tipc_subscr_stop();	tipc_reg_stop();	tipc_nametbl_stop();	tipc_ref_table_stop();	tipc_socket_stop();} /** * tipc_core_start - switch TIPC from NOT RUNNING to SINGLE NODE mode */ int tipc_core_start(void){	int res; 	if (tipc_mode != TIPC_NOT_RUNNING)		return -ENOPROTOOPT; 	get_random_bytes(&tipc_random, sizeof(tipc_random));	tipc_mode = TIPC_NODE_MODE; 	if ((res = tipc_handler_start()) || 	    (res = tipc_ref_table_init(tipc_max_ports + tipc_max_subscriptions,				       tipc_random)) ||	    (res = tipc_reg_start()) ||	    (res = tipc_nametbl_init()) ||            (res = tipc_k_signal((Handler)tipc_subscr_start, 0)) ||	    (res = tipc_k_signal((Handler)tipc_cfg_init, 0)) || 	    (res = tipc_netlink_start()) ||	    (res = tipc_socket_init())) {		tipc_core_stop();	}	return res;}  static int __init tipc_init(void){	int res; 	tipc_log_reinit(CONFIG_TIPC_LOG);	info("Activated (compiled " __DATE__ " " __TIME__ ")\n"); 	tipc_own_addr = 0;	tipc_remote_management = 1;	tipc_max_publications = 10000;	tipc_max_subscriptions = 2000;	tipc_max_ports = delimit(CONFIG_TIPC_PORTS, 127, 65536);	tipc_max_zones = delimit(CONFIG_TIPC_ZONES, 1, 511);	tipc_max_clusters = delimit(CONFIG_TIPC_CLUSTERS, 1, 1);	tipc_max_nodes = delimit(CONFIG_TIPC_NODES, 8, 2047);	tipc_max_slaves = delimit(CONFIG_TIPC_SLAVE_NODES, 0, 2047);	tipc_net_id = 4711; 	if ((res = tipc_core_start()))		err("Unable to start in single node mode\n");	else			info("Started in single node mode\n");        return res;} static void __exit tipc_exit(void){	tipc_core_stop_net();	tipc_core_stop();	info("Deactivated\n");	tipc_log_stop();} module_init(tipc_init);module_exit(tipc_exit); MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication");MODULE_LICENSE("Dual BSD/GPL"); /* Native TIPC API for kernel-space applications (see tipc.h) */ EXPORT_SYMBOL(tipc_attach);EXPORT_SYMBOL(tipc_detach);EXPORT_SYMBOL(tipc_get_addr);EXPORT_SYMBOL(tipc_get_mode);EXPORT_SYMBOL(tipc_createport);EXPORT_SYMBOL(tipc_deleteport);EXPORT_SYMBOL(tipc_ownidentity);EXPORT_SYMBOL(tipc_portimportance);EXPORT_SYMBOL(tipc_set_portimportance);EXPORT_SYMBOL(tipc_portunreliable);EXPORT_SYMBOL(tipc_set_portunreliable);EXPORT_SYMBOL(tipc_portunreturnable);EXPORT_SYMBOL(tipc_set_portunreturnable);EXPORT_SYMBOL(tipc_publish);EXPORT_SYMBOL(tipc_withdraw);EXPORT_SYMBOL(tipc_connect2port);EXPORT_SYMBOL(tipc_disconnect);EXPORT_SYMBOL(tipc_shutdown);EXPORT_SYMBOL(tipc_isconnected);EXPORT_SYMBOL(tipc_peer);EXPORT_SYMBOL(tipc_ref_valid);EXPORT_SYMBOL(tipc_send);EXPORT_SYMBOL(tipc_send_buf);EXPORT_SYMBOL(tipc_send2name);EXPORT_SYMBOL(tipc_forward2name);EXPORT_SYMBOL(tipc_send_buf2name);EXPORT_SYMBOL(tipc_forward_buf2name);EXPORT_SYMBOL(tipc_send2port);EXPORT_SYMBOL(tipc_forward2port);EXPORT_SYMBOL(tipc_send_buf2port);EXPORT_SYMBOL(tipc_forward_buf2port);EXPORT_SYMBOL(tipc_multicast);/* EXPORT_SYMBOL(tipc_multicast_buf); not available yet */EXPORT_SYMBOL(tipc_ispublished);EXPORT_SYMBOL(tipc_available_nodes); /* TIPC API for external bearers (see tipc_bearer.h) */ EXPORT_SYMBOL(tipc_block_bearer);EXPORT_SYMBOL(tipc_continue); EXPORT_SYMBOL(tipc_disable_bearer);EXPORT_SYMBOL(tipc_enable_bearer);EXPORT_SYMBOL(tipc_recv_msg);EXPORT_SYMBOL(tipc_register_media);  /* TIPC API for external APIs (see tipc_port.h) */ EXPORT_SYMBOL(tipc_createport_raw);EXPORT_SYMBOL(tipc_set_msg_option);EXPORT_SYMBOL(tipc_reject_msg);EXPORT_SYMBOL(tipc_send_buf_fast);EXPORT_SYMBOL(tipc_acknowledge);EXPORT_SYMBOL(tipc_get_port);EXPORT_SYMBOL(tipc_get_handle);