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Per Lidenb97bf3f2006-01-02 19:04:38 +01001/*
2 * net/tipc/core.c: TIPC module code
3 *
Ying Xuec61dd612014-02-13 17:29:09 -05004 * Copyright (c) 2003-2006, 2013, Ericsson AB
Ying Xue13a2e892013-06-17 10:54:40 -04005 * Copyright (c) 2005-2006, 2010-2013, 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 "name_table.h"
39#include "subscr.h"
40#include "config.h"
Jon Paul Maloy2e84c602014-08-22 18:09:18 -040041#include "socket.h"
Per Lidenb97bf3f2006-01-02 19:04:38 +010042
Erik Hugne2cf8aa12012-06-29 00:16:37 -040043#include <linux/module.h>
Per Lidenb97bf3f2006-01-02 19:04:38 +010044
Per Lidenb97bf3f2006-01-02 19:04:38 +010045/* global variables used by multiple sub-systems within TIPC */
Ying Xue61cdd4d2012-08-16 12:09:12 +000046int tipc_random __read_mostly;
Per Lidenb97bf3f2006-01-02 19:04:38 +010047
Per Lidenb97bf3f2006-01-02 19:04:38 +010048/* configurable TIPC parameters */
Ying Xue61cdd4d2012-08-16 12:09:12 +000049u32 tipc_own_addr __read_mostly;
50int tipc_max_ports __read_mostly;
Ying Xue61cdd4d2012-08-16 12:09:12 +000051int tipc_net_id __read_mostly;
Ying Xuecc79dd12013-06-17 10:54:37 -040052int sysctl_tipc_rmem[3] __read_mostly; /* min/default/max */
Per Lidenb97bf3f2006-01-02 19:04:38 +010053
Per Lidenb97bf3f2006-01-02 19:04:38 +010054/**
stephen hemminger31e3c3f2010-10-13 13:20:35 +000055 * tipc_buf_acquire - creates a TIPC message buffer
Allan Stephens3032cca2010-05-11 14:30:17 +000056 * @size: message size (including TIPC header)
57 *
58 * Returns a new buffer with data pointers set to the specified size.
59 *
60 * NOTE: Headroom is reserved to allow prepending of a data link header.
61 * There may also be unrequested tailroom present at the buffer's end.
62 */
stephen hemminger31e3c3f2010-10-13 13:20:35 +000063struct sk_buff *tipc_buf_acquire(u32 size)
Allan Stephens3032cca2010-05-11 14:30:17 +000064{
65 struct sk_buff *skb;
66 unsigned int buf_size = (BUF_HEADROOM + size + 3) & ~3u;
67
68 skb = alloc_skb_fclone(buf_size, GFP_ATOMIC);
69 if (skb) {
70 skb_reserve(skb, BUF_HEADROOM);
71 skb_put(skb, size);
72 skb->next = NULL;
73 }
74 return skb;
75}
76
77/**
Per Liden4323add2006-01-18 00:38:21 +010078 * tipc_core_stop - switch TIPC from SINGLE NODE to NOT RUNNING mode
Per Lidenb97bf3f2006-01-02 19:04:38 +010079 */
stephen hemminger31e3c3f2010-10-13 13:20:35 +000080static void tipc_core_stop(void)
Per Lidenb97bf3f2006-01-02 19:04:38 +010081{
Ying Xue970122f2014-02-20 11:32:50 +080082 tipc_net_stop();
83 tipc_bearer_cleanup();
Per Liden4323add2006-01-18 00:38:21 +010084 tipc_netlink_stop();
Per Liden4323add2006-01-18 00:38:21 +010085 tipc_subscr_stop();
Per Liden4323add2006-01-18 00:38:21 +010086 tipc_nametbl_stop();
Jon Paul Maloy808d90f2014-08-22 18:09:19 -040087 tipc_sk_ref_table_stop();
Per Liden4323add2006-01-18 00:38:21 +010088 tipc_socket_stop();
Ying Xuecc79dd12013-06-17 10:54:37 -040089 tipc_unregister_sysctl();
Per Lidenb97bf3f2006-01-02 19:04:38 +010090}
91
92/**
Per Liden4323add2006-01-18 00:38:21 +010093 * tipc_core_start - switch TIPC from NOT RUNNING to SINGLE NODE mode
Per Lidenb97bf3f2006-01-02 19:04:38 +010094 */
stephen hemminger31e3c3f2010-10-13 13:20:35 +000095static int tipc_core_start(void)
Per Lidenb97bf3f2006-01-02 19:04:38 +010096{
Ying Xue9fe7ed42014-02-20 11:32:49 +080097 int err;
Per Lidenb97bf3f2006-01-02 19:04:38 +010098
Per Lidenb97bf3f2006-01-02 19:04:38 +010099 get_random_bytes(&tipc_random, sizeof(tipc_random));
Per Lidenb97bf3f2006-01-02 19:04:38 +0100100
Jon Paul Maloy808d90f2014-08-22 18:09:19 -0400101 err = tipc_sk_ref_table_init(tipc_max_ports, tipc_random);
Ying Xue9fe7ed42014-02-20 11:32:49 +0800102 if (err)
103 goto out_reftbl;
104
105 err = tipc_nametbl_init();
106 if (err)
107 goto out_nametbl;
108
109 err = tipc_netlink_start();
110 if (err)
111 goto out_netlink;
112
113 err = tipc_socket_init();
114 if (err)
115 goto out_socket;
116
117 err = tipc_register_sysctl();
118 if (err)
119 goto out_sysctl;
120
121 err = tipc_subscr_start();
122 if (err)
123 goto out_subscr;
124
Ying Xue970122f2014-02-20 11:32:50 +0800125 err = tipc_bearer_setup();
126 if (err)
127 goto out_bearer;
128
Ying Xue9fe7ed42014-02-20 11:32:49 +0800129 return 0;
Ying Xue970122f2014-02-20 11:32:50 +0800130out_bearer:
Ying Xue9fe7ed42014-02-20 11:32:49 +0800131 tipc_subscr_stop();
132out_subscr:
133 tipc_unregister_sysctl();
134out_sysctl:
135 tipc_socket_stop();
136out_socket:
137 tipc_netlink_stop();
138out_netlink:
139 tipc_nametbl_stop();
140out_nametbl:
Jon Paul Maloy808d90f2014-08-22 18:09:19 -0400141 tipc_sk_ref_table_stop();
Ying Xue9fe7ed42014-02-20 11:32:49 +0800142out_reftbl:
Ying Xue9fe7ed42014-02-20 11:32:49 +0800143 return err;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100144}
145
Per Lidenb97bf3f2006-01-02 19:04:38 +0100146static int __init tipc_init(void)
147{
148 int res;
149
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400150 pr_info("Activated (version " TIPC_MOD_VER ")\n");
Per Lidenb97bf3f2006-01-02 19:04:38 +0100151
152 tipc_own_addr = 0;
Amerigo Wangee983ac2009-12-24 17:26:48 +0000153 tipc_max_ports = CONFIG_TIPC_PORTS;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100154 tipc_net_id = 4711;
155
Jon Paul Maloy6163a192014-05-14 05:39:08 -0400156 sysctl_tipc_rmem[0] = TIPC_CONN_OVERLOAD_LIMIT >> 4 <<
157 TIPC_LOW_IMPORTANCE;
158 sysctl_tipc_rmem[1] = TIPC_CONN_OVERLOAD_LIMIT >> 4 <<
Ying Xuecc79dd12013-06-17 10:54:37 -0400159 TIPC_CRITICAL_IMPORTANCE;
Jon Paul Maloy6163a192014-05-14 05:39:08 -0400160 sysctl_tipc_rmem[2] = TIPC_CONN_OVERLOAD_LIMIT;
Ying Xuecc79dd12013-06-17 10:54:37 -0400161
Allan Stephens2db99832010-12-31 18:59:33 +0000162 res = tipc_core_start();
163 if (res)
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400164 pr_err("Unable to start in single node mode\n");
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900165 else
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400166 pr_info("Started in single node mode\n");
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900167 return res;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100168}
169
170static void __exit tipc_exit(void)
171{
Per Liden4323add2006-01-18 00:38:21 +0100172 tipc_core_stop();
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400173 pr_info("Deactivated\n");
Per Lidenb97bf3f2006-01-02 19:04:38 +0100174}
175
176module_init(tipc_init);
177module_exit(tipc_exit);
178
179MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication");
180MODULE_LICENSE("Dual BSD/GPL");
Allan Stephensa592ea62006-06-25 23:42:47 -0700181MODULE_VERSION(TIPC_MOD_VER);