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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
Per Lidenb97bf3f2006-01-02 19:04:38 +010037#include "core.h"
Per Lidenb97bf3f2006-01-02 19:04:38 +010038#include "ref.h"
Per Lidenb97bf3f2006-01-02 19:04:38 +010039#include "name_table.h"
40#include "subscr.h"
41#include "config.h"
42
Per Lidenb97bf3f2006-01-02 19:04:38 +010043
Per Lidenb97bf3f2006-01-02 19:04:38 +010044#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;
Per Lidenb97bf3f2006-01-02 19:04:38 +010056
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +090057const char tipc_alphabet[] =
Allan Stephens3a8d1212006-10-16 21:50:20 -070058 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_.";
Per Lidenb97bf3f2006-01-02 19:04:38 +010059
60/* configurable TIPC parameters */
61
62u32 tipc_own_addr;
Per Lidenb97bf3f2006-01-02 19:04:38 +010063int tipc_max_ports;
64int tipc_max_subscriptions;
65int tipc_max_publications;
66int tipc_net_id;
67int tipc_remote_management;
68
69
Per Lidenb97bf3f2006-01-02 19:04:38 +010070/**
stephen hemminger31e3c3f2010-10-13 13:20:35 +000071 * tipc_buf_acquire - creates a TIPC message buffer
Allan Stephens3032cca2010-05-11 14:30:17 +000072 * @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
stephen hemminger31e3c3f2010-10-13 13:20:35 +000080struct sk_buff *tipc_buf_acquire(u32 size)
Allan Stephens3032cca2010-05-11 14:30:17 +000081{
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/**
Per Liden4323add2006-01-18 00:38:21 +010095 * tipc_core_stop_net - shut down TIPC networking sub-systems
Per Lidenb97bf3f2006-01-02 19:04:38 +010096 */
97
stephen hemminger31e3c3f2010-10-13 13:20:35 +000098static void tipc_core_stop_net(void)
Per Lidenb97bf3f2006-01-02 19:04:38 +010099{
Per Liden4323add2006-01-18 00:38:21 +0100100 tipc_eth_media_stop();
101 tipc_net_stop();
Per Lidenb97bf3f2006-01-02 19:04:38 +0100102}
103
104/**
105 * start_net - start TIPC networking sub-systems
106 */
107
Allan Stephens03194372008-05-21 14:55:04 -0700108int tipc_core_start_net(unsigned long addr)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100109{
110 int res;
111
Allan Stephens2db99832010-12-31 18:59:33 +0000112 res = tipc_net_start(addr);
113 if (!res)
114 res = tipc_eth_media_start();
115 if (res)
Per Liden4323add2006-01-18 00:38:21 +0100116 tipc_core_stop_net();
Per Lidenb97bf3f2006-01-02 19:04:38 +0100117 return res;
118}
119
120/**
Per Liden4323add2006-01-18 00:38:21 +0100121 * tipc_core_stop - switch TIPC from SINGLE NODE to NOT RUNNING mode
Per Lidenb97bf3f2006-01-02 19:04:38 +0100122 */
123
stephen hemminger31e3c3f2010-10-13 13:20:35 +0000124static void tipc_core_stop(void)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100125{
126 if (tipc_mode != TIPC_NODE_MODE)
127 return;
128
129 tipc_mode = TIPC_NOT_RUNNING;
130
Per Liden4323add2006-01-18 00:38:21 +0100131 tipc_netlink_stop();
132 tipc_handler_stop();
133 tipc_cfg_stop();
134 tipc_subscr_stop();
Per Liden4323add2006-01-18 00:38:21 +0100135 tipc_nametbl_stop();
136 tipc_ref_table_stop();
137 tipc_socket_stop();
Anders Kaseorgf8138092010-08-17 11:00:03 +0000138 tipc_log_resize(0);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100139}
140
141/**
Per Liden4323add2006-01-18 00:38:21 +0100142 * tipc_core_start - switch TIPC from NOT RUNNING to SINGLE NODE mode
Per Lidenb97bf3f2006-01-02 19:04:38 +0100143 */
144
stephen hemminger31e3c3f2010-10-13 13:20:35 +0000145static int tipc_core_start(void)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100146{
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
Allan Stephens2db99832010-12-31 18:59:33 +0000155 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)
Per Liden4323add2006-01-18 00:38:21 +0100169 tipc_core_stop();
Allan Stephens2db99832010-12-31 18:59:33 +0000170
Per Lidenb97bf3f2006-01-02 19:04:38 +0100171 return res;
172}
173
174
175static int __init tipc_init(void)
176{
177 int res;
178
Anders Kaseorgf8138092010-08-17 11:00:03 +0000179 if (tipc_log_resize(CONFIG_TIPC_LOG) != 0)
180 warn("Unable to create log buffer\n");
181
Michal Marek97fbdc12011-04-05 16:59:16 +0200182 info("Activated (version " TIPC_MOD_VER ")\n");
Per Lidenb97bf3f2006-01-02 19:04:38 +0100183
184 tipc_own_addr = 0;
185 tipc_remote_management = 1;
186 tipc_max_publications = 10000;
187 tipc_max_subscriptions = 2000;
Amerigo Wangee983ac2009-12-24 17:26:48 +0000188 tipc_max_ports = CONFIG_TIPC_PORTS;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100189 tipc_net_id = 4711;
190
Allan Stephens2db99832010-12-31 18:59:33 +0000191 res = tipc_core_start();
192 if (res)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100193 err("Unable to start in single node mode\n");
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900194 else
Per Lidenb97bf3f2006-01-02 19:04:38 +0100195 info("Started in single node mode\n");
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900196 return res;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100197}
198
199static void __exit tipc_exit(void)
200{
Per Liden4323add2006-01-18 00:38:21 +0100201 tipc_core_stop_net();
202 tipc_core_stop();
Per Lidenb97bf3f2006-01-02 19:04:38 +0100203 info("Deactivated\n");
Per Lidenb97bf3f2006-01-02 19:04:38 +0100204}
205
206module_init(tipc_init);
207module_exit(tipc_exit);
208
209MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication");
210MODULE_LICENSE("Dual BSD/GPL");
Allan Stephensa592ea62006-06-25 23:42:47 -0700211MODULE_VERSION(TIPC_MOD_VER);