Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/*
2 * net/tipc/core.c: TIPC module code
3 *
4 * Copyright (c) 2003-2006, Ericsson AB
5 * Copyright (c) 2005, 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/version.h>
41#include <linux/random.h>
42
43#include "core.h"
44#include "dbg.h"
45#include "ref.h"
46#include "net.h"
47#include "user_reg.h"
48#include "name_table.h"
49#include "subscr.h"
50#include "config.h"
51
52int eth_media_start(void);
53void eth_media_stop(void);
54int handler_start(void);
55void handler_stop(void);
56int socket_init(void);
57void socket_stop(void);
58int netlink_start(void);
59void netlink_stop(void);
60
61#define MOD_NAME "tipc_start: "
62
63#ifndef CONFIG_TIPC_ZONES
64#define CONFIG_TIPC_ZONES 3
65#endif
66
67#ifndef CONFIG_TIPC_CLUSTERS
68#define CONFIG_TIPC_CLUSTERS 1
69#endif
70
71#ifndef CONFIG_TIPC_NODES
72#define CONFIG_TIPC_NODES 255
73#endif
74
75#ifndef CONFIG_TIPC_SLAVE_NODES
76#define CONFIG_TIPC_SLAVE_NODES 0
77#endif
78
79#ifndef CONFIG_TIPC_PORTS
80#define CONFIG_TIPC_PORTS 8191
81#endif
82
83#ifndef CONFIG_TIPC_LOG
84#define CONFIG_TIPC_LOG 0
85#endif
86
87/* global variables used by multiple sub-systems within TIPC */
88
89int tipc_mode = TIPC_NOT_RUNNING;
90int tipc_random;
91atomic_t tipc_user_count = ATOMIC_INIT(0);
92
93const char tipc_alphabet[] =
94 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_";
95
96/* configurable TIPC parameters */
97
98u32 tipc_own_addr;
99int tipc_max_zones;
100int tipc_max_clusters;
101int tipc_max_nodes;
102int tipc_max_slaves;
103int tipc_max_ports;
104int tipc_max_subscriptions;
105int tipc_max_publications;
106int tipc_net_id;
107int tipc_remote_management;
108
109
110int tipc_get_mode(void)
111{
112 return tipc_mode;
113}
114
115/**
116 * stop_net - shut down TIPC networking sub-systems
117 */
118
119void stop_net(void)
120{
121 eth_media_stop();
122 tipc_stop_net();
123}
124
125/**
126 * start_net - start TIPC networking sub-systems
127 */
128
129int start_net(void)
130{
131 int res;
132
133 if ((res = tipc_start_net()) ||
134 (res = eth_media_start())) {
135 stop_net();
136 }
137 return res;
138}
139
140/**
141 * stop_core - switch TIPC from SINGLE NODE to NOT RUNNING mode
142 */
143
144void stop_core(void)
145{
146 if (tipc_mode != TIPC_NODE_MODE)
147 return;
148
149 tipc_mode = TIPC_NOT_RUNNING;
150
151 netlink_stop();
152 handler_stop();
153 cfg_stop();
154 subscr_stop();
155 reg_stop();
156 nametbl_stop();
157 ref_table_stop();
158 socket_stop();
159}
160
161/**
162 * start_core - switch TIPC from NOT RUNNING to SINGLE NODE mode
163 */
164
165int start_core(void)
166{
167 int res;
168
169 if (tipc_mode != TIPC_NOT_RUNNING)
170 return -ENOPROTOOPT;
171
172 get_random_bytes(&tipc_random, sizeof(tipc_random));
173 tipc_mode = TIPC_NODE_MODE;
174
175 if ((res = handler_start()) ||
176 (res = ref_table_init(tipc_max_ports + tipc_max_subscriptions,
177 tipc_random)) ||
178 (res = reg_start()) ||
179 (res = nametbl_init()) ||
180 (res = k_signal((Handler)subscr_start, 0)) ||
181 (res = k_signal((Handler)cfg_init, 0)) ||
182 (res = netlink_start()) ||
183 (res = socket_init())) {
184 stop_core();
185 }
186 return res;
187}
188
189
190static int __init tipc_init(void)
191{
192 int res;
193
194 log_reinit(CONFIG_TIPC_LOG);
195 info("Activated (compiled " __DATE__ " " __TIME__ ")\n");
196
197 tipc_own_addr = 0;
198 tipc_remote_management = 1;
199 tipc_max_publications = 10000;
200 tipc_max_subscriptions = 2000;
201 tipc_max_ports = delimit(CONFIG_TIPC_PORTS, 127, 65536);
202 tipc_max_zones = delimit(CONFIG_TIPC_ZONES, 1, 511);
203 tipc_max_clusters = delimit(CONFIG_TIPC_CLUSTERS, 1, 1);
204 tipc_max_nodes = delimit(CONFIG_TIPC_NODES, 8, 2047);
205 tipc_max_slaves = delimit(CONFIG_TIPC_SLAVE_NODES, 0, 2047);
206 tipc_net_id = 4711;
207
208 if ((res = start_core()))
209 err("Unable to start in single node mode\n");
210 else
211 info("Started in single node mode\n");
212 return res;
213}
214
215static void __exit tipc_exit(void)
216{
217 stop_net();
218 stop_core();
219 info("Deactivated\n");
220 log_stop();
221}
222
223module_init(tipc_init);
224module_exit(tipc_exit);
225
226MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication");
227MODULE_LICENSE("Dual BSD/GPL");
228
229/* Native TIPC API for kernel-space applications (see tipc.h) */
230
231EXPORT_SYMBOL(tipc_attach);
232EXPORT_SYMBOL(tipc_detach);
233EXPORT_SYMBOL(tipc_get_addr);
234EXPORT_SYMBOL(tipc_get_mode);
235EXPORT_SYMBOL(tipc_createport);
236EXPORT_SYMBOL(tipc_deleteport);
237EXPORT_SYMBOL(tipc_ownidentity);
238EXPORT_SYMBOL(tipc_portimportance);
239EXPORT_SYMBOL(tipc_set_portimportance);
240EXPORT_SYMBOL(tipc_portunreliable);
241EXPORT_SYMBOL(tipc_set_portunreliable);
242EXPORT_SYMBOL(tipc_portunreturnable);
243EXPORT_SYMBOL(tipc_set_portunreturnable);
244EXPORT_SYMBOL(tipc_publish);
245EXPORT_SYMBOL(tipc_withdraw);
246EXPORT_SYMBOL(tipc_connect2port);
247EXPORT_SYMBOL(tipc_disconnect);
248EXPORT_SYMBOL(tipc_shutdown);
249EXPORT_SYMBOL(tipc_isconnected);
250EXPORT_SYMBOL(tipc_peer);
251EXPORT_SYMBOL(tipc_ref_valid);
252EXPORT_SYMBOL(tipc_send);
253EXPORT_SYMBOL(tipc_send_buf);
254EXPORT_SYMBOL(tipc_send2name);
255EXPORT_SYMBOL(tipc_forward2name);
256EXPORT_SYMBOL(tipc_send_buf2name);
257EXPORT_SYMBOL(tipc_forward_buf2name);
258EXPORT_SYMBOL(tipc_send2port);
259EXPORT_SYMBOL(tipc_forward2port);
260EXPORT_SYMBOL(tipc_send_buf2port);
261EXPORT_SYMBOL(tipc_forward_buf2port);
262EXPORT_SYMBOL(tipc_multicast);
263/* EXPORT_SYMBOL(tipc_multicast_buf); not available yet */
264EXPORT_SYMBOL(tipc_ispublished);
265EXPORT_SYMBOL(tipc_available_nodes);
266
267/* TIPC API for external bearers (see tipc_bearer.h) */
268
269EXPORT_SYMBOL(tipc_block_bearer);
270EXPORT_SYMBOL(tipc_continue);
271EXPORT_SYMBOL(tipc_disable_bearer);
272EXPORT_SYMBOL(tipc_enable_bearer);
273EXPORT_SYMBOL(tipc_recv_msg);
274EXPORT_SYMBOL(tipc_register_media);
275
276/* TIPC API for external APIs (see tipc_port.h) */
277
278EXPORT_SYMBOL(tipc_createport_raw);
279EXPORT_SYMBOL(tipc_set_msg_option);
280EXPORT_SYMBOL(tipc_reject_msg);
281EXPORT_SYMBOL(tipc_send_buf_fast);
282EXPORT_SYMBOL(tipc_acknowledge);
283EXPORT_SYMBOL(tipc_get_port);
284EXPORT_SYMBOL(tipc_get_handle);
285