Root/net/tipc/core.c

1/*
2 * net/tipc/core.c: TIPC module code
3 *
4 * Copyright (c) 2003-2006, Ericsson AB
5 * Copyright (c) 2005-2006, 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/init.h>
38#include <linux/module.h>
39#include <linux/kernel.h>
40#include <linux/random.h>
41
42#include "core.h"
43#include "dbg.h"
44#include "ref.h"
45#include "net.h"
46#include "user_reg.h"
47#include "name_table.h"
48#include "subscr.h"
49#include "config.h"
50
51
52#define TIPC_MOD_VER "1.6.4"
53
54#ifndef CONFIG_TIPC_ZONES
55#define CONFIG_TIPC_ZONES 3
56#endif
57
58#ifndef CONFIG_TIPC_CLUSTERS
59#define CONFIG_TIPC_CLUSTERS 1
60#endif
61
62#ifndef CONFIG_TIPC_NODES
63#define CONFIG_TIPC_NODES 255
64#endif
65
66#ifndef CONFIG_TIPC_SLAVE_NODES
67#define CONFIG_TIPC_SLAVE_NODES 0
68#endif
69
70#ifndef CONFIG_TIPC_PORTS
71#define CONFIG_TIPC_PORTS 8191
72#endif
73
74#ifndef CONFIG_TIPC_LOG
75#define CONFIG_TIPC_LOG 0
76#endif
77
78/* global variables used by multiple sub-systems within TIPC */
79
80int tipc_mode = TIPC_NOT_RUNNING;
81int tipc_random;
82atomic_t tipc_user_count = ATOMIC_INIT(0);
83
84const char tipc_alphabet[] =
85    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_.";
86
87/* configurable TIPC parameters */
88
89u32 tipc_own_addr;
90int tipc_max_zones;
91int tipc_max_clusters;
92int tipc_max_nodes;
93int tipc_max_slaves;
94int tipc_max_ports;
95int tipc_max_subscriptions;
96int tipc_max_publications;
97int tipc_net_id;
98int tipc_remote_management;
99
100
101int tipc_get_mode(void)
102{
103    return tipc_mode;
104}
105
106/**
107 * tipc_core_stop_net - shut down TIPC networking sub-systems
108 */
109
110void tipc_core_stop_net(void)
111{
112    tipc_eth_media_stop();
113    tipc_net_stop();
114}
115
116/**
117 * start_net - start TIPC networking sub-systems
118 */
119
120int tipc_core_start_net(unsigned long addr)
121{
122    int res;
123
124    if ((res = tipc_net_start(addr)) ||
125        (res = tipc_eth_media_start())) {
126        tipc_core_stop_net();
127    }
128    return res;
129}
130
131/**
132 * tipc_core_stop - switch TIPC from SINGLE NODE to NOT RUNNING mode
133 */
134
135void tipc_core_stop(void)
136{
137    if (tipc_mode != TIPC_NODE_MODE)
138        return;
139
140    tipc_mode = TIPC_NOT_RUNNING;
141
142    tipc_netlink_stop();
143    tipc_handler_stop();
144    tipc_cfg_stop();
145    tipc_subscr_stop();
146    tipc_reg_stop();
147    tipc_nametbl_stop();
148    tipc_ref_table_stop();
149    tipc_socket_stop();
150}
151
152/**
153 * tipc_core_start - switch TIPC from NOT RUNNING to SINGLE NODE mode
154 */
155
156int tipc_core_start(void)
157{
158    int res;
159
160    if (tipc_mode != TIPC_NOT_RUNNING)
161        return -ENOPROTOOPT;
162
163    get_random_bytes(&tipc_random, sizeof(tipc_random));
164    tipc_mode = TIPC_NODE_MODE;
165
166    if ((res = tipc_handler_start()) ||
167        (res = tipc_ref_table_init(tipc_max_ports, tipc_random)) ||
168        (res = tipc_reg_start()) ||
169        (res = tipc_nametbl_init()) ||
170        (res = tipc_k_signal((Handler)tipc_subscr_start, 0)) ||
171        (res = tipc_k_signal((Handler)tipc_cfg_init, 0)) ||
172        (res = tipc_netlink_start()) ||
173        (res = tipc_socket_init())) {
174        tipc_core_stop();
175    }
176    return res;
177}
178
179
180static int __init tipc_init(void)
181{
182    int res;
183
184    tipc_log_resize(CONFIG_TIPC_LOG);
185    info("Activated (version " TIPC_MOD_VER
186         " compiled " __DATE__ " " __TIME__ ")\n");
187
188    tipc_own_addr = 0;
189    tipc_remote_management = 1;
190    tipc_max_publications = 10000;
191    tipc_max_subscriptions = 2000;
192    tipc_max_ports = delimit(CONFIG_TIPC_PORTS, 127, 65536);
193    tipc_max_zones = delimit(CONFIG_TIPC_ZONES, 1, 255);
194    tipc_max_clusters = delimit(CONFIG_TIPC_CLUSTERS, 1, 1);
195    tipc_max_nodes = delimit(CONFIG_TIPC_NODES, 8, 2047);
196    tipc_max_slaves = delimit(CONFIG_TIPC_SLAVE_NODES, 0, 2047);
197    tipc_net_id = 4711;
198
199    if ((res = tipc_core_start()))
200        err("Unable to start in single node mode\n");
201    else
202        info("Started in single node mode\n");
203    return res;
204}
205
206static void __exit tipc_exit(void)
207{
208    tipc_core_stop_net();
209    tipc_core_stop();
210    info("Deactivated\n");
211    tipc_log_resize(0);
212}
213
214module_init(tipc_init);
215module_exit(tipc_exit);
216
217MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication");
218MODULE_LICENSE("Dual BSD/GPL");
219MODULE_VERSION(TIPC_MOD_VER);
220
221/* Native TIPC API for kernel-space applications (see tipc.h) */
222
223EXPORT_SYMBOL(tipc_attach);
224EXPORT_SYMBOL(tipc_detach);
225EXPORT_SYMBOL(tipc_get_addr);
226EXPORT_SYMBOL(tipc_get_mode);
227EXPORT_SYMBOL(tipc_createport);
228EXPORT_SYMBOL(tipc_deleteport);
229EXPORT_SYMBOL(tipc_ownidentity);
230EXPORT_SYMBOL(tipc_portimportance);
231EXPORT_SYMBOL(tipc_set_portimportance);
232EXPORT_SYMBOL(tipc_portunreliable);
233EXPORT_SYMBOL(tipc_set_portunreliable);
234EXPORT_SYMBOL(tipc_portunreturnable);
235EXPORT_SYMBOL(tipc_set_portunreturnable);
236EXPORT_SYMBOL(tipc_publish);
237EXPORT_SYMBOL(tipc_withdraw);
238EXPORT_SYMBOL(tipc_connect2port);
239EXPORT_SYMBOL(tipc_disconnect);
240EXPORT_SYMBOL(tipc_shutdown);
241EXPORT_SYMBOL(tipc_isconnected);
242EXPORT_SYMBOL(tipc_peer);
243EXPORT_SYMBOL(tipc_ref_valid);
244EXPORT_SYMBOL(tipc_send);
245EXPORT_SYMBOL(tipc_send_buf);
246EXPORT_SYMBOL(tipc_send2name);
247EXPORT_SYMBOL(tipc_forward2name);
248EXPORT_SYMBOL(tipc_send_buf2name);
249EXPORT_SYMBOL(tipc_forward_buf2name);
250EXPORT_SYMBOL(tipc_send2port);
251EXPORT_SYMBOL(tipc_forward2port);
252EXPORT_SYMBOL(tipc_send_buf2port);
253EXPORT_SYMBOL(tipc_forward_buf2port);
254EXPORT_SYMBOL(tipc_multicast);
255/* EXPORT_SYMBOL(tipc_multicast_buf); not available yet */
256EXPORT_SYMBOL(tipc_ispublished);
257EXPORT_SYMBOL(tipc_available_nodes);
258
259/* TIPC API for external bearers (see tipc_bearer.h) */
260
261EXPORT_SYMBOL(tipc_block_bearer);
262EXPORT_SYMBOL(tipc_continue);
263EXPORT_SYMBOL(tipc_disable_bearer);
264EXPORT_SYMBOL(tipc_enable_bearer);
265EXPORT_SYMBOL(tipc_recv_msg);
266EXPORT_SYMBOL(tipc_register_media);
267
268/* TIPC API for external APIs (see tipc_port.h) */
269
270EXPORT_SYMBOL(tipc_createport_raw);
271EXPORT_SYMBOL(tipc_reject_msg);
272EXPORT_SYMBOL(tipc_send_buf_fast);
273EXPORT_SYMBOL(tipc_acknowledge);
274EXPORT_SYMBOL(tipc_get_port);
275EXPORT_SYMBOL(tipc_get_handle);
276
277

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