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
28 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
34 * POSSIBILITY OF SUCH DAMAGE.
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();
175 * tipc_core_start - switch TIPC from NOT RUNNING to SINGLE NODE mode
178 int tipc_core_start(void)
182 if (tipc_mode
!= TIPC_NOT_RUNNING
)
185 get_random_bytes(&tipc_random
, sizeof(tipc_random
));
186 tipc_mode
= TIPC_NODE_MODE
;
188 if ((res
= tipc_handler_start()) ||
189 (res
= tipc_ref_table_init(tipc_max_ports
, tipc_random
)) ||
190 (res
= tipc_reg_start()) ||
191 (res
= tipc_nametbl_init()) ||
192 (res
= tipc_k_signal((Handler
)tipc_subscr_start
, 0)) ||
193 (res
= tipc_k_signal((Handler
)tipc_cfg_init
, 0)) ||
194 (res
= tipc_netlink_start()) ||
195 (res
= tipc_socket_init())) {
202 static int __init
tipc_init(void)
206 tipc_log_resize(CONFIG_TIPC_LOG
);
207 info("Activated (version " TIPC_MOD_VER
208 " compiled " __DATE__
" " __TIME__
")\n");
211 tipc_remote_management
= 1;
212 tipc_max_publications
= 10000;
213 tipc_max_subscriptions
= 2000;
214 tipc_max_ports
= CONFIG_TIPC_PORTS
;
215 tipc_max_zones
= CONFIG_TIPC_ZONES
;
216 tipc_max_clusters
= CONFIG_TIPC_CLUSTERS
;
217 tipc_max_nodes
= CONFIG_TIPC_NODES
;
218 tipc_max_slaves
= CONFIG_TIPC_SLAVE_NODES
;
221 if ((res
= tipc_core_start()))
222 err("Unable to start in single node mode\n");
224 info("Started in single node mode\n");
228 static void __exit
tipc_exit(void)
230 tipc_core_stop_net();
232 info("Deactivated\n");
236 module_init(tipc_init
);
237 module_exit(tipc_exit
);
239 MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication");
240 MODULE_LICENSE("Dual BSD/GPL");
241 MODULE_VERSION(TIPC_MOD_VER
);
243 /* Native TIPC API for kernel-space applications (see tipc.h) */
245 EXPORT_SYMBOL(tipc_attach
);
246 EXPORT_SYMBOL(tipc_detach
);
247 EXPORT_SYMBOL(tipc_get_addr
);
248 EXPORT_SYMBOL(tipc_get_mode
);
249 EXPORT_SYMBOL(tipc_createport
);
250 EXPORT_SYMBOL(tipc_deleteport
);
251 EXPORT_SYMBOL(tipc_ownidentity
);
252 EXPORT_SYMBOL(tipc_portimportance
);
253 EXPORT_SYMBOL(tipc_set_portimportance
);
254 EXPORT_SYMBOL(tipc_portunreliable
);
255 EXPORT_SYMBOL(tipc_set_portunreliable
);
256 EXPORT_SYMBOL(tipc_portunreturnable
);
257 EXPORT_SYMBOL(tipc_set_portunreturnable
);
258 EXPORT_SYMBOL(tipc_publish
);
259 EXPORT_SYMBOL(tipc_withdraw
);
260 EXPORT_SYMBOL(tipc_connect2port
);
261 EXPORT_SYMBOL(tipc_disconnect
);
262 EXPORT_SYMBOL(tipc_shutdown
);
263 EXPORT_SYMBOL(tipc_isconnected
);
264 EXPORT_SYMBOL(tipc_peer
);
265 EXPORT_SYMBOL(tipc_ref_valid
);
266 EXPORT_SYMBOL(tipc_send
);
267 EXPORT_SYMBOL(tipc_send_buf
);
268 EXPORT_SYMBOL(tipc_send2name
);
269 EXPORT_SYMBOL(tipc_forward2name
);
270 EXPORT_SYMBOL(tipc_send_buf2name
);
271 EXPORT_SYMBOL(tipc_forward_buf2name
);
272 EXPORT_SYMBOL(tipc_send2port
);
273 EXPORT_SYMBOL(tipc_forward2port
);
274 EXPORT_SYMBOL(tipc_send_buf2port
);
275 EXPORT_SYMBOL(tipc_forward_buf2port
);
276 EXPORT_SYMBOL(tipc_multicast
);
277 /* EXPORT_SYMBOL(tipc_multicast_buf); not available yet */
278 EXPORT_SYMBOL(tipc_ispublished
);
279 EXPORT_SYMBOL(tipc_available_nodes
);
281 /* TIPC API for external bearers (see tipc_bearer.h) */
283 EXPORT_SYMBOL(tipc_block_bearer
);
284 EXPORT_SYMBOL(tipc_continue
);
285 EXPORT_SYMBOL(tipc_disable_bearer
);
286 EXPORT_SYMBOL(tipc_enable_bearer
);
287 EXPORT_SYMBOL(tipc_recv_msg
);
288 EXPORT_SYMBOL(tipc_register_media
);
290 /* TIPC API for external APIs (see tipc_port.h) */
292 EXPORT_SYMBOL(tipc_createport_raw
);
293 EXPORT_SYMBOL(tipc_reject_msg
);
294 EXPORT_SYMBOL(tipc_send_buf_fast
);
295 EXPORT_SYMBOL(tipc_acknowledge
);
296 EXPORT_SYMBOL(tipc_get_port
);
297 EXPORT_SYMBOL(tipc_get_handle
);