net/tipc/core.c - linux - Git at Google

 /*
  * net/tipc/core.c: TIPC module code
  *
  * Copyright (c) 2003-2006, Ericsson AB
  * Copyright (c) 2005-2006, 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"


 #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;
 }

 /**
  * buf_acquire - creates a TIPC message buffer
  * @size: message size (including TIPC header)
  *
  * Returns a new buffer with data pointers set to the specified size.
  *
  * NOTE: Headroom is reserved to allow prepending of a data link header.
  *       There may also be unrequested tailroom present at the buffer's end.
  */

 struct sk_buff *buf_acquire(u32 size)
 {
 	struct sk_buff *skb;
 	unsigned int buf_size = (BUF_HEADROOM + size + 3) & ~3u;

 	skb = alloc_skb_fclone(buf_size, GFP_ATOMIC);
 	if (skb) {
 		skb_reserve(skb, BUF_HEADROOM);
 		skb_put(skb, size);
 		skb->next = NULL;
 	}
 	return skb;
 }

 /**
  * 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(unsigned long addr)
 {
 	int res;

 	if ((res = tipc_net_start(addr)) ||
 	    (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_log_resize(0);
 }

 /**
  * 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_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;

 	if (tipc_log_resize(CONFIG_TIPC_LOG) != 0)
 		warn("Unable to create log buffer\n");

 	info("Activated (version " TIPC_MOD_VER
 	     " compiled " __DATE__ " " __TIME__ ")\n");

 	tipc_own_addr = 0;
 	tipc_remote_management = 1;
 	tipc_max_publications = 10000;
 	tipc_max_subscriptions = 2000;
 	tipc_max_ports = CONFIG_TIPC_PORTS;
 	tipc_max_zones = CONFIG_TIPC_ZONES;
 	tipc_max_clusters = CONFIG_TIPC_CLUSTERS;
 	tipc_max_nodes = CONFIG_TIPC_NODES;
 	tipc_max_slaves = CONFIG_TIPC_SLAVE_NODES;
 	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");
 }

 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);

 /* 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_reject_msg);
 EXPORT_SYMBOL(tipc_send_buf_fast);
 EXPORT_SYMBOL(tipc_acknowledge);
 EXPORT_SYMBOL(tipc_get_port);
 EXPORT_SYMBOL(tipc_get_handle);
	/*
	* net/tipc/core.c: TIPC module code
	*
	* Copyright (c) 2003-2006, Ericsson AB
	* Copyright (c) 2005-2006, 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"


	#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;
	}

	/**
	* buf_acquire - creates a TIPC message buffer
	* @size: message size (including TIPC header)
	*
	* Returns a new buffer with data pointers set to the specified size.
	*
	* NOTE: Headroom is reserved to allow prepending of a data link header.
	* There may also be unrequested tailroom present at the buffer's end.
	*/

	struct sk_buff *buf_acquire(u32 size)
	{
	struct sk_buff *skb;
	unsigned int buf_size = (BUF_HEADROOM + size + 3) & ~3u;

	skb = alloc_skb_fclone(buf_size, GFP_ATOMIC);
	if (skb) {
	skb_reserve(skb, BUF_HEADROOM);
	skb_put(skb, size);
	skb->next = NULL;
	}
	return skb;
	}

	/**
	* 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(unsigned long addr)
	{
	int res;

	if ((res = tipc_net_start(addr)) \|\|
	(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_log_resize(0);
	}

	/**
	* 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_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;

	if (tipc_log_resize(CONFIG_TIPC_LOG) != 0)
	warn("Unable to create log buffer\n");

	info("Activated (version " TIPC_MOD_VER
	" compiled " __DATE__ " " __TIME__ ")\n");

	tipc_own_addr = 0;
	tipc_remote_management = 1;
	tipc_max_publications = 10000;
	tipc_max_subscriptions = 2000;
	tipc_max_ports = CONFIG_TIPC_PORTS;
	tipc_max_zones = CONFIG_TIPC_ZONES;
	tipc_max_clusters = CONFIG_TIPC_CLUSTERS;
	tipc_max_nodes = CONFIG_TIPC_NODES;
	tipc_max_slaves = CONFIG_TIPC_SLAVE_NODES;
	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");
	}

	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);

	/* 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_reject_msg);
	EXPORT_SYMBOL(tipc_send_buf_fast);
	EXPORT_SYMBOL(tipc_acknowledge);
	EXPORT_SYMBOL(tipc_get_port);
	EXPORT_SYMBOL(tipc_get_handle);