1/*
  2 * net/tipc/core.c: TIPC module code
  3 *
  4 * Copyright (c) 2003-2006, Ericsson AB
  5 * Copyright (c) 2005-2006, 2010-2011, Wind River Systems
  6 * All rights reserved.
  7 *
  8 * Redistribution and use in source and binary forms, with or without
  9 * modification, are permitted provided that the following conditions are met:
 10 *
 11 * 1. Redistributions of source code must retain the above copyright
 12 *    notice, this list of conditions and the following disclaimer.
 13 * 2. Redistributions in binary form must reproduce the above copyright
 14 *    notice, this list of conditions and the following disclaimer in the
 15 *    documentation and/or other materials provided with the distribution.
 16 * 3. Neither the names of the copyright holders nor the names of its
 17 *    contributors may be used to endorse or promote products derived from
 18 *    this software without specific prior written permission.
 19 *
 20 * Alternatively, this software may be distributed under the terms of the
 21 * GNU General Public License ("GPL") version 2 as published by the Free
 22 * Software Foundation.
 23 *
 24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 28 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 34 * POSSIBILITY OF SUCH DAMAGE.
 35 */
 36
 
 
 37#include "core.h"
 38#include "ref.h"
 39#include "name_table.h"
 40#include "subscr.h"
 41#include "config.h"
 42
 43
 44#ifndef CONFIG_TIPC_PORTS
 45#define CONFIG_TIPC_PORTS 8191
 46#endif
 47
 48#ifndef CONFIG_TIPC_LOG
 49#define CONFIG_TIPC_LOG 0
 50#endif
 51
 52/* global variables used by multiple sub-systems within TIPC */
 53
 54int tipc_mode = TIPC_NOT_RUNNING;
 55int tipc_random;
 56
 57const char tipc_alphabet[] =
 58	"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_.";
 59
 60/* configurable TIPC parameters */
 61
 62u32 tipc_own_addr;
 63int tipc_max_ports;
 64int tipc_max_subscriptions;
 65int tipc_max_publications;
 66int tipc_net_id;
 67int tipc_remote_management;
 68
 69
 70/**
 71 * tipc_buf_acquire - creates a TIPC message buffer
 72 * @size: message size (including TIPC header)
 73 *
 74 * Returns a new buffer with data pointers set to the specified size.
 75 *
 76 * NOTE: Headroom is reserved to allow prepending of a data link header.
 77 *       There may also be unrequested tailroom present at the buffer's end.
 78 */
 79
 80struct sk_buff *tipc_buf_acquire(u32 size)
 81{
 82	struct sk_buff *skb;
 83	unsigned int buf_size = (BUF_HEADROOM + size + 3) & ~3u;
 84
 85	skb = alloc_skb_fclone(buf_size, GFP_ATOMIC);
 86	if (skb) {
 87		skb_reserve(skb, BUF_HEADROOM);
 88		skb_put(skb, size);
 89		skb->next = NULL;
 90	}
 91	return skb;
 92}
 93
 94/**
 95 * tipc_core_stop_net - shut down TIPC networking sub-systems
 96 */
 97
 98static void tipc_core_stop_net(void)
 99{
100	tipc_eth_media_stop();
101	tipc_net_stop();
 
102}
103
104/**
105 * start_net - start TIPC networking sub-systems
106 */
107
108int tipc_core_start_net(unsigned long addr)
109{
110	int res;
111
112	res = tipc_net_start(addr);
113	if (!res)
114		res = tipc_eth_media_start();
115	if (res)
116		tipc_core_stop_net();
117	return res;
118}
119
120/**
121 * tipc_core_stop - switch TIPC from SINGLE NODE to NOT RUNNING mode
122 */
123
124static void tipc_core_stop(void)
125{
126	if (tipc_mode != TIPC_NODE_MODE)
127		return;
128
129	tipc_mode = TIPC_NOT_RUNNING;
130
131	tipc_netlink_stop();
132	tipc_handler_stop();
133	tipc_cfg_stop();
134	tipc_subscr_stop();
135	tipc_nametbl_stop();
136	tipc_ref_table_stop();
137	tipc_socket_stop();
138	tipc_log_resize(0);
139}
140
141/**
142 * tipc_core_start - switch TIPC from NOT RUNNING to SINGLE NODE mode
143 */
144
145static int tipc_core_start(void)
146{
147	int res;
148
149	if (tipc_mode != TIPC_NOT_RUNNING)
150		return -ENOPROTOOPT;
151
152	get_random_bytes(&tipc_random, sizeof(tipc_random));
153	tipc_mode = TIPC_NODE_MODE;
154
155	res = tipc_handler_start();
156	if (!res)
157		res = tipc_ref_table_init(tipc_max_ports, tipc_random);
158	if (!res)
159		res = tipc_nametbl_init();
160	if (!res)
161		res = tipc_k_signal((Handler)tipc_subscr_start, 0);
162	if (!res)
163		res = tipc_k_signal((Handler)tipc_cfg_init, 0);
164	if (!res)
165		res = tipc_netlink_start();
166	if (!res)
167		res = tipc_socket_init();
168	if (res)
169		tipc_core_stop();
170
171	return res;
172}
173
174
175static int __init tipc_init(void)
176{
177	int res;
178
179	if (tipc_log_resize(CONFIG_TIPC_LOG) != 0)
180		warn("Unable to create log buffer\n");
181
182	info("Activated (version " TIPC_MOD_VER ")\n");
183
184	tipc_own_addr = 0;
185	tipc_remote_management = 1;
186	tipc_max_publications = 10000;
187	tipc_max_subscriptions = 2000;
188	tipc_max_ports = CONFIG_TIPC_PORTS;
189	tipc_net_id = 4711;
190
191	res = tipc_core_start();
192	if (res)
193		err("Unable to start in single node mode\n");
194	else
195		info("Started in single node mode\n");
196	return res;
197}
198
199static void __exit tipc_exit(void)
200{
201	tipc_core_stop_net();
202	tipc_core_stop();
203	info("Deactivated\n");
204}
205
206module_init(tipc_init);
207module_exit(tipc_exit);
208
209MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication");
210MODULE_LICENSE("Dual BSD/GPL");
211MODULE_VERSION(TIPC_MOD_VER);

  1/*
  2 * net/tipc/core.c: TIPC module code
  3 *
  4 * Copyright (c) 2003-2006, Ericsson AB
  5 * Copyright (c) 2005-2006, 2010-2011, Wind River Systems
  6 * All rights reserved.
  7 *
  8 * Redistribution and use in source and binary forms, with or without
  9 * modification, are permitted provided that the following conditions are met:
 10 *
 11 * 1. Redistributions of source code must retain the above copyright
 12 *    notice, this list of conditions and the following disclaimer.
 13 * 2. Redistributions in binary form must reproduce the above copyright
 14 *    notice, this list of conditions and the following disclaimer in the
 15 *    documentation and/or other materials provided with the distribution.
 16 * 3. Neither the names of the copyright holders nor the names of its
 17 *    contributors may be used to endorse or promote products derived from
 18 *    this software without specific prior written permission.
 19 *
 20 * Alternatively, this software may be distributed under the terms of the
 21 * GNU General Public License ("GPL") version 2 as published by the Free
 22 * Software Foundation.
 23 *
 24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 28 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 34 * POSSIBILITY OF SUCH DAMAGE.
 35 */
 36
 37#include <linux/module.h>
 38
 39#include "core.h"
 40#include "ref.h"
 41#include "name_table.h"
 42#include "subscr.h"
 43#include "config.h"
 44
 45
 46#ifndef CONFIG_TIPC_PORTS
 47#define CONFIG_TIPC_PORTS 8191
 48#endif
 49
 50#ifndef CONFIG_TIPC_LOG
 51#define CONFIG_TIPC_LOG 0
 52#endif
 53
 54/* global variables used by multiple sub-systems within TIPC */
 
 
 55int tipc_random;
 56
 57const char tipc_alphabet[] =
 58	"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_.";
 59
 60/* configurable TIPC parameters */
 
 61u32 tipc_own_addr;
 62int tipc_max_ports;
 63int tipc_max_subscriptions;
 64int tipc_max_publications;
 65int tipc_net_id;
 66int tipc_remote_management;
 67
 68
 69/**
 70 * tipc_buf_acquire - creates a TIPC message buffer
 71 * @size: message size (including TIPC header)
 72 *
 73 * Returns a new buffer with data pointers set to the specified size.
 74 *
 75 * NOTE: Headroom is reserved to allow prepending of a data link header.
 76 *       There may also be unrequested tailroom present at the buffer's end.
 77 */
 
 78struct sk_buff *tipc_buf_acquire(u32 size)
 79{
 80	struct sk_buff *skb;
 81	unsigned int buf_size = (BUF_HEADROOM + size + 3) & ~3u;
 82
 83	skb = alloc_skb_fclone(buf_size, GFP_ATOMIC);
 84	if (skb) {
 85		skb_reserve(skb, BUF_HEADROOM);
 86		skb_put(skb, size);
 87		skb->next = NULL;
 88	}
 89	return skb;
 90}
 91
 92/**
 93 * tipc_core_stop_net - shut down TIPC networking sub-systems
 94 */
 
 95static void tipc_core_stop_net(void)
 96{
 
 97	tipc_net_stop();
 98	tipc_eth_media_stop();
 99}
100
101/**
102 * start_net - start TIPC networking sub-systems
103 */
 
104int tipc_core_start_net(unsigned long addr)
105{
106	int res;
107
108	res = tipc_net_start(addr);
109	if (!res)
110		res = tipc_eth_media_start();
111	if (res)
112		tipc_core_stop_net();
113	return res;
114}
115
116/**
117 * tipc_core_stop - switch TIPC from SINGLE NODE to NOT RUNNING mode
118 */
 
119static void tipc_core_stop(void)
120{
 
 
 
 
 
121	tipc_netlink_stop();
122	tipc_handler_stop();
123	tipc_cfg_stop();
124	tipc_subscr_stop();
125	tipc_nametbl_stop();
126	tipc_ref_table_stop();
127	tipc_socket_stop();
128	tipc_log_resize(0);
129}
130
131/**
132 * tipc_core_start - switch TIPC from NOT RUNNING to SINGLE NODE mode
133 */
 
134static int tipc_core_start(void)
135{
136	int res;
137
 
 
 
138	get_random_bytes(&tipc_random, sizeof(tipc_random));
 
139
140	res = tipc_handler_start();
141	if (!res)
142		res = tipc_ref_table_init(tipc_max_ports, tipc_random);
143	if (!res)
144		res = tipc_nametbl_init();
145	if (!res)
146		res = tipc_subscr_start();
147	if (!res)
148		res = tipc_cfg_init();
149	if (!res)
150		res = tipc_netlink_start();
151	if (!res)
152		res = tipc_socket_init();
153	if (res)
154		tipc_core_stop();
155
156	return res;
157}
158
159
160static int __init tipc_init(void)
161{
162	int res;
163
164	if (tipc_log_resize(CONFIG_TIPC_LOG) != 0)
165		warn("Unable to create log buffer\n");
166
167	info("Activated (version " TIPC_MOD_VER ")\n");
168
169	tipc_own_addr = 0;
170	tipc_remote_management = 1;
171	tipc_max_publications = 10000;
172	tipc_max_subscriptions = 2000;
173	tipc_max_ports = CONFIG_TIPC_PORTS;
174	tipc_net_id = 4711;
175
176	res = tipc_core_start();
177	if (res)
178		err("Unable to start in single node mode\n");
179	else
180		info("Started in single node mode\n");
181	return res;
182}
183
184static void __exit tipc_exit(void)
185{
186	tipc_core_stop_net();
187	tipc_core_stop();
188	info("Deactivated\n");
189}
190
191module_init(tipc_init);
192module_exit(tipc_exit);
193
194MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication");
195MODULE_LICENSE("Dual BSD/GPL");
196MODULE_VERSION(TIPC_MOD_VER);