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Per Lidenb97bf3f2006-01-02 19:04:38 +01001/*
2 * net/tipc/core.c: TIPC module code
3 *
Per Liden9da1c8b2006-01-11 18:40:41 +01004 * Copyright (c) 2003-2006, Ericsson AB
Allan Stephens4132fac2011-01-07 13:12:12 -05005 * Copyright (c) 2005-2006, 2010-2011, Wind River Systems
Per Lidenb97bf3f2006-01-02 19:04:38 +01006 * All rights reserved.
7 *
Per Liden9ea1fd32006-01-11 13:30:43 +01008 * Redistribution and use in source and binary forms, with or without
Per Lidenb97bf3f2006-01-02 19:04:38 +01009 * modification, are permitted provided that the following conditions are met:
10 *
Per Liden9ea1fd32006-01-11 13:30:43 +010011 * 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.
Per Lidenb97bf3f2006-01-02 19:04:38 +010019 *
Per Liden9ea1fd32006-01-11 13:30:43 +010020 * 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
Per Lidenb97bf3f2006-01-02 19:04:38 +010034 * POSSIBILITY OF SUCH DAMAGE.
35 */
36
Paul Gortmaker3a9a2312011-05-27 09:12:25 -040037#include <linux/module.h>
38
Per Lidenb97bf3f2006-01-02 19:04:38 +010039#include "core.h"
Per Lidenb97bf3f2006-01-02 19:04:38 +010040#include "ref.h"
Per Lidenb97bf3f2006-01-02 19:04:38 +010041#include "name_table.h"
42#include "subscr.h"
43#include "config.h"
44
Per Lidenb97bf3f2006-01-02 19:04:38 +010045
Per Lidenb97bf3f2006-01-02 19:04:38 +010046#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 */
55
56int tipc_mode = TIPC_NOT_RUNNING;
57int tipc_random;
Per Lidenb97bf3f2006-01-02 19:04:38 +010058
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +090059const char tipc_alphabet[] =
Allan Stephens3a8d1212006-10-16 21:50:20 -070060 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_.";
Per Lidenb97bf3f2006-01-02 19:04:38 +010061
62/* configurable TIPC parameters */
63
64u32 tipc_own_addr;
Per Lidenb97bf3f2006-01-02 19:04:38 +010065int tipc_max_ports;
66int tipc_max_subscriptions;
67int tipc_max_publications;
68int tipc_net_id;
69int tipc_remote_management;
70
71
Per Lidenb97bf3f2006-01-02 19:04:38 +010072/**
stephen hemminger31e3c3f2010-10-13 13:20:35 +000073 * tipc_buf_acquire - creates a TIPC message buffer
Allan Stephens3032cca2010-05-11 14:30:17 +000074 * @size: message size (including TIPC header)
75 *
76 * Returns a new buffer with data pointers set to the specified size.
77 *
78 * NOTE: Headroom is reserved to allow prepending of a data link header.
79 * There may also be unrequested tailroom present at the buffer's end.
80 */
81
stephen hemminger31e3c3f2010-10-13 13:20:35 +000082struct sk_buff *tipc_buf_acquire(u32 size)
Allan Stephens3032cca2010-05-11 14:30:17 +000083{
84 struct sk_buff *skb;
85 unsigned int buf_size = (BUF_HEADROOM + size + 3) & ~3u;
86
87 skb = alloc_skb_fclone(buf_size, GFP_ATOMIC);
88 if (skb) {
89 skb_reserve(skb, BUF_HEADROOM);
90 skb_put(skb, size);
91 skb->next = NULL;
92 }
93 return skb;
94}
95
96/**
Per Liden4323add2006-01-18 00:38:21 +010097 * tipc_core_stop_net - shut down TIPC networking sub-systems
Per Lidenb97bf3f2006-01-02 19:04:38 +010098 */
99
stephen hemminger31e3c3f2010-10-13 13:20:35 +0000100static void tipc_core_stop_net(void)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100101{
Per Liden4323add2006-01-18 00:38:21 +0100102 tipc_net_stop();
Allan Stephens8c12118d2011-10-19 14:58:29 -0400103 tipc_eth_media_stop();
Per Lidenb97bf3f2006-01-02 19:04:38 +0100104}
105
106/**
107 * start_net - start TIPC networking sub-systems
108 */
109
Allan Stephens03194372008-05-21 14:55:04 -0700110int tipc_core_start_net(unsigned long addr)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100111{
112 int res;
113
Allan Stephens2db99832010-12-31 18:59:33 +0000114 res = tipc_net_start(addr);
115 if (!res)
116 res = tipc_eth_media_start();
117 if (res)
Per Liden4323add2006-01-18 00:38:21 +0100118 tipc_core_stop_net();
Per Lidenb97bf3f2006-01-02 19:04:38 +0100119 return res;
120}
121
122/**
Per Liden4323add2006-01-18 00:38:21 +0100123 * tipc_core_stop - switch TIPC from SINGLE NODE to NOT RUNNING mode
Per Lidenb97bf3f2006-01-02 19:04:38 +0100124 */
125
stephen hemminger31e3c3f2010-10-13 13:20:35 +0000126static void tipc_core_stop(void)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100127{
128 if (tipc_mode != TIPC_NODE_MODE)
129 return;
130
131 tipc_mode = TIPC_NOT_RUNNING;
132
Per Liden4323add2006-01-18 00:38:21 +0100133 tipc_netlink_stop();
134 tipc_handler_stop();
135 tipc_cfg_stop();
136 tipc_subscr_stop();
Per Liden4323add2006-01-18 00:38:21 +0100137 tipc_nametbl_stop();
138 tipc_ref_table_stop();
139 tipc_socket_stop();
Anders Kaseorgf8138092010-08-17 11:00:03 +0000140 tipc_log_resize(0);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100141}
142
143/**
Per Liden4323add2006-01-18 00:38:21 +0100144 * tipc_core_start - switch TIPC from NOT RUNNING to SINGLE NODE mode
Per Lidenb97bf3f2006-01-02 19:04:38 +0100145 */
146
stephen hemminger31e3c3f2010-10-13 13:20:35 +0000147static int tipc_core_start(void)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100148{
149 int res;
150
151 if (tipc_mode != TIPC_NOT_RUNNING)
152 return -ENOPROTOOPT;
153
154 get_random_bytes(&tipc_random, sizeof(tipc_random));
155 tipc_mode = TIPC_NODE_MODE;
156
Allan Stephens2db99832010-12-31 18:59:33 +0000157 res = tipc_handler_start();
158 if (!res)
159 res = tipc_ref_table_init(tipc_max_ports, tipc_random);
160 if (!res)
161 res = tipc_nametbl_init();
162 if (!res)
163 res = tipc_k_signal((Handler)tipc_subscr_start, 0);
164 if (!res)
165 res = tipc_k_signal((Handler)tipc_cfg_init, 0);
166 if (!res)
167 res = tipc_netlink_start();
168 if (!res)
169 res = tipc_socket_init();
170 if (res)
Per Liden4323add2006-01-18 00:38:21 +0100171 tipc_core_stop();
Allan Stephens2db99832010-12-31 18:59:33 +0000172
Per Lidenb97bf3f2006-01-02 19:04:38 +0100173 return res;
174}
175
176
177static int __init tipc_init(void)
178{
179 int res;
180
Anders Kaseorgf8138092010-08-17 11:00:03 +0000181 if (tipc_log_resize(CONFIG_TIPC_LOG) != 0)
182 warn("Unable to create log buffer\n");
183
Michal Marek97fbdc12011-04-05 16:59:16 +0200184 info("Activated (version " TIPC_MOD_VER ")\n");
Per Lidenb97bf3f2006-01-02 19:04:38 +0100185
186 tipc_own_addr = 0;
187 tipc_remote_management = 1;
188 tipc_max_publications = 10000;
189 tipc_max_subscriptions = 2000;
Amerigo Wangee983ac2009-12-24 17:26:48 +0000190 tipc_max_ports = CONFIG_TIPC_PORTS;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100191 tipc_net_id = 4711;
192
Allan Stephens2db99832010-12-31 18:59:33 +0000193 res = tipc_core_start();
194 if (res)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100195 err("Unable to start in single node mode\n");
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900196 else
Per Lidenb97bf3f2006-01-02 19:04:38 +0100197 info("Started in single node mode\n");
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900198 return res;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100199}
200
201static void __exit tipc_exit(void)
202{
Per Liden4323add2006-01-18 00:38:21 +0100203 tipc_core_stop_net();
204 tipc_core_stop();
Per Lidenb97bf3f2006-01-02 19:04:38 +0100205 info("Deactivated\n");
Per Lidenb97bf3f2006-01-02 19:04:38 +0100206}
207
208module_init(tipc_init);
209module_exit(tipc_exit);
210
211MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication");
212MODULE_LICENSE("Dual BSD/GPL");
Allan Stephensa592ea62006-06-25 23:42:47 -0700213MODULE_VERSION(TIPC_MOD_VER);