2 * net/tipc/core.c: TIPC module code
4 * Copyright (c) 2003-2006, Ericsson AB
5 * Copyright (c) 2005-2006, Wind River Systems
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
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.
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.
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
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37 #include <linux/init.h>
38 #include <linux/module.h>
39 #include <linux/kernel.h>
40 #include <linux/random.h>
47 #include "name_table.h"
52 #ifndef CONFIG_TIPC_ZONES
53 #define CONFIG_TIPC_ZONES 3
56 #ifndef CONFIG_TIPC_CLUSTERS
57 #define CONFIG_TIPC_CLUSTERS 1
60 #ifndef CONFIG_TIPC_NODES
61 #define CONFIG_TIPC_NODES 255
64 #ifndef CONFIG_TIPC_SLAVE_NODES
65 #define CONFIG_TIPC_SLAVE_NODES 0
68 #ifndef CONFIG_TIPC_PORTS
69 #define CONFIG_TIPC_PORTS 8191
72 #ifndef CONFIG_TIPC_LOG
73 #define CONFIG_TIPC_LOG 0
76 /* global variables used by multiple sub-systems within TIPC */
78 int tipc_mode = TIPC_NOT_RUNNING;
80 atomic_t tipc_user_count = ATOMIC_INIT(0);
82 const char tipc_alphabet[] =
83 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_.";
85 /* configurable TIPC parameters */
89 int tipc_max_clusters;
93 int tipc_max_subscriptions;
94 int tipc_max_publications;
96 int tipc_remote_management;
99 int tipc_get_mode(void)
105 * buf_acquire - creates a TIPC message buffer
106 * @size: message size (including TIPC header)
108 * Returns a new buffer with data pointers set to the specified size.
110 * NOTE: Headroom is reserved to allow prepending of a data link header.
111 * There may also be unrequested tailroom present at the buffer's end.
114 struct sk_buff *buf_acquire(u32 size)
117 unsigned int buf_size = (BUF_HEADROOM + size + 3) & ~3u;
119 skb = alloc_skb_fclone(buf_size, GFP_ATOMIC);
121 skb_reserve(skb, BUF_HEADROOM);
129 * tipc_core_stop_net - shut down TIPC networking sub-systems
132 void tipc_core_stop_net(void)
134 tipc_eth_media_stop();
139 * start_net - start TIPC networking sub-systems
142 int tipc_core_start_net(unsigned long addr)
146 if ((res = tipc_net_start(addr)) ||
147 (res = tipc_eth_media_start())) {
148 tipc_core_stop_net();
154 * tipc_core_stop - switch TIPC from SINGLE NODE to NOT RUNNING mode
157 void tipc_core_stop(void)
159 if (tipc_mode != TIPC_NODE_MODE)
162 tipc_mode = TIPC_NOT_RUNNING;
170 tipc_ref_table_stop();
176 * tipc_core_start - switch TIPC from NOT RUNNING to SINGLE NODE mode
179 int tipc_core_start(void)
183 if (tipc_mode != TIPC_NOT_RUNNING)
186 get_random_bytes(&tipc_random, sizeof(tipc_random));
187 tipc_mode = TIPC_NODE_MODE;
189 if ((res = tipc_handler_start()) ||
190 (res = tipc_ref_table_init(tipc_max_ports, tipc_random)) ||
191 (res = tipc_reg_start()) ||
192 (res = tipc_nametbl_init()) ||
193 (res = tipc_k_signal((Handler)tipc_subscr_start, 0)) ||
194 (res = tipc_k_signal((Handler)tipc_cfg_init, 0)) ||
195 (res = tipc_netlink_start()) ||
196 (res = tipc_socket_init())) {
203 static int __init tipc_init(void)
207 if (tipc_log_resize(CONFIG_TIPC_LOG) != 0)
208 warn("Unable to create log buffer\n");
210 info("Activated (version " TIPC_MOD_VER
211 " compiled " __DATE__ " " __TIME__ ")\n");
214 tipc_remote_management = 1;
215 tipc_max_publications = 10000;
216 tipc_max_subscriptions = 2000;
217 tipc_max_ports = CONFIG_TIPC_PORTS;
218 tipc_max_zones = CONFIG_TIPC_ZONES;
219 tipc_max_clusters = CONFIG_TIPC_CLUSTERS;
220 tipc_max_nodes = CONFIG_TIPC_NODES;
221 tipc_max_slaves = CONFIG_TIPC_SLAVE_NODES;
224 if ((res = tipc_core_start()))
225 err("Unable to start in single node mode\n");
227 info("Started in single node mode\n");
231 static void __exit tipc_exit(void)
233 tipc_core_stop_net();
235 info("Deactivated\n");
238 module_init(tipc_init);
239 module_exit(tipc_exit);
241 MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication");
242 MODULE_LICENSE("Dual BSD/GPL");
243 MODULE_VERSION(TIPC_MOD_VER);
245 /* Native TIPC API for kernel-space applications (see tipc.h) */
247 EXPORT_SYMBOL(tipc_attach);
248 EXPORT_SYMBOL(tipc_detach);
249 EXPORT_SYMBOL(tipc_get_addr);
250 EXPORT_SYMBOL(tipc_get_mode);
251 EXPORT_SYMBOL(tipc_createport);
252 EXPORT_SYMBOL(tipc_deleteport);
253 EXPORT_SYMBOL(tipc_ownidentity);
254 EXPORT_SYMBOL(tipc_portimportance);
255 EXPORT_SYMBOL(tipc_set_portimportance);
256 EXPORT_SYMBOL(tipc_portunreliable);
257 EXPORT_SYMBOL(tipc_set_portunreliable);
258 EXPORT_SYMBOL(tipc_portunreturnable);
259 EXPORT_SYMBOL(tipc_set_portunreturnable);
260 EXPORT_SYMBOL(tipc_publish);
261 EXPORT_SYMBOL(tipc_withdraw);
262 EXPORT_SYMBOL(tipc_connect2port);
263 EXPORT_SYMBOL(tipc_disconnect);
264 EXPORT_SYMBOL(tipc_shutdown);
265 EXPORT_SYMBOL(tipc_isconnected);
266 EXPORT_SYMBOL(tipc_peer);
267 EXPORT_SYMBOL(tipc_ref_valid);
268 EXPORT_SYMBOL(tipc_send);
269 EXPORT_SYMBOL(tipc_send_buf);
270 EXPORT_SYMBOL(tipc_send2name);
271 EXPORT_SYMBOL(tipc_forward2name);
272 EXPORT_SYMBOL(tipc_send_buf2name);
273 EXPORT_SYMBOL(tipc_forward_buf2name);
274 EXPORT_SYMBOL(tipc_send2port);
275 EXPORT_SYMBOL(tipc_forward2port);
276 EXPORT_SYMBOL(tipc_send_buf2port);
277 EXPORT_SYMBOL(tipc_forward_buf2port);
278 EXPORT_SYMBOL(tipc_multicast);
279 /* EXPORT_SYMBOL(tipc_multicast_buf); not available yet */
280 EXPORT_SYMBOL(tipc_ispublished);
281 EXPORT_SYMBOL(tipc_available_nodes);
283 /* TIPC API for external bearers (see tipc_bearer.h) */
285 EXPORT_SYMBOL(tipc_block_bearer);
286 EXPORT_SYMBOL(tipc_continue);
287 EXPORT_SYMBOL(tipc_disable_bearer);
288 EXPORT_SYMBOL(tipc_enable_bearer);
289 EXPORT_SYMBOL(tipc_recv_msg);
290 EXPORT_SYMBOL(tipc_register_media);
292 /* TIPC API for external APIs (see tipc_port.h) */
294 EXPORT_SYMBOL(tipc_createport_raw);
295 EXPORT_SYMBOL(tipc_reject_msg);
296 EXPORT_SYMBOL(tipc_send_buf_fast);
297 EXPORT_SYMBOL(tipc_acknowledge);
298 EXPORT_SYMBOL(tipc_get_port);
299 EXPORT_SYMBOL(tipc_get_handle);