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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 | |
80 | int tipc_mode = TIPC_NOT_RUNNING; |
81 | int tipc_random; |
82 | atomic_t tipc_user_count = ATOMIC_INIT(0); |
83 | |
84 | const char tipc_alphabet[] = |
85 | "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_."; |
86 | |
87 | /* configurable TIPC parameters */ |
88 | |
89 | u32 tipc_own_addr; |
90 | int tipc_max_zones; |
91 | int tipc_max_clusters; |
92 | int tipc_max_nodes; |
93 | int tipc_max_slaves; |
94 | int tipc_max_ports; |
95 | int tipc_max_subscriptions; |
96 | int tipc_max_publications; |
97 | int tipc_net_id; |
98 | int tipc_remote_management; |
99 | |
100 | |
101 | int 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 | |
110 | void 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 | |
120 | int 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 | |
135 | void 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 | |
156 | int 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 | |
180 | static 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 = CONFIG_TIPC_PORTS; |
193 | tipc_max_zones = CONFIG_TIPC_ZONES; |
194 | tipc_max_clusters = CONFIG_TIPC_CLUSTERS; |
195 | tipc_max_nodes = CONFIG_TIPC_NODES; |
196 | tipc_max_slaves = CONFIG_TIPC_SLAVE_NODES; |
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 | |
206 | static 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 | |
214 | module_init(tipc_init); |
215 | module_exit(tipc_exit); |
216 | |
217 | MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication"); |
218 | MODULE_LICENSE("Dual BSD/GPL"); |
219 | MODULE_VERSION(TIPC_MOD_VER); |
220 | |
221 | /* Native TIPC API for kernel-space applications (see tipc.h) */ |
222 | |
223 | EXPORT_SYMBOL(tipc_attach); |
224 | EXPORT_SYMBOL(tipc_detach); |
225 | EXPORT_SYMBOL(tipc_get_addr); |
226 | EXPORT_SYMBOL(tipc_get_mode); |
227 | EXPORT_SYMBOL(tipc_createport); |
228 | EXPORT_SYMBOL(tipc_deleteport); |
229 | EXPORT_SYMBOL(tipc_ownidentity); |
230 | EXPORT_SYMBOL(tipc_portimportance); |
231 | EXPORT_SYMBOL(tipc_set_portimportance); |
232 | EXPORT_SYMBOL(tipc_portunreliable); |
233 | EXPORT_SYMBOL(tipc_set_portunreliable); |
234 | EXPORT_SYMBOL(tipc_portunreturnable); |
235 | EXPORT_SYMBOL(tipc_set_portunreturnable); |
236 | EXPORT_SYMBOL(tipc_publish); |
237 | EXPORT_SYMBOL(tipc_withdraw); |
238 | EXPORT_SYMBOL(tipc_connect2port); |
239 | EXPORT_SYMBOL(tipc_disconnect); |
240 | EXPORT_SYMBOL(tipc_shutdown); |
241 | EXPORT_SYMBOL(tipc_isconnected); |
242 | EXPORT_SYMBOL(tipc_peer); |
243 | EXPORT_SYMBOL(tipc_ref_valid); |
244 | EXPORT_SYMBOL(tipc_send); |
245 | EXPORT_SYMBOL(tipc_send_buf); |
246 | EXPORT_SYMBOL(tipc_send2name); |
247 | EXPORT_SYMBOL(tipc_forward2name); |
248 | EXPORT_SYMBOL(tipc_send_buf2name); |
249 | EXPORT_SYMBOL(tipc_forward_buf2name); |
250 | EXPORT_SYMBOL(tipc_send2port); |
251 | EXPORT_SYMBOL(tipc_forward2port); |
252 | EXPORT_SYMBOL(tipc_send_buf2port); |
253 | EXPORT_SYMBOL(tipc_forward_buf2port); |
254 | EXPORT_SYMBOL(tipc_multicast); |
255 | /* EXPORT_SYMBOL(tipc_multicast_buf); not available yet */ |
256 | EXPORT_SYMBOL(tipc_ispublished); |
257 | EXPORT_SYMBOL(tipc_available_nodes); |
258 | |
259 | /* TIPC API for external bearers (see tipc_bearer.h) */ |
260 | |
261 | EXPORT_SYMBOL(tipc_block_bearer); |
262 | EXPORT_SYMBOL(tipc_continue); |
263 | EXPORT_SYMBOL(tipc_disable_bearer); |
264 | EXPORT_SYMBOL(tipc_enable_bearer); |
265 | EXPORT_SYMBOL(tipc_recv_msg); |
266 | EXPORT_SYMBOL(tipc_register_media); |
267 | |
268 | /* TIPC API for external APIs (see tipc_port.h) */ |
269 | |
270 | EXPORT_SYMBOL(tipc_createport_raw); |
271 | EXPORT_SYMBOL(tipc_reject_msg); |
272 | EXPORT_SYMBOL(tipc_send_buf_fast); |
273 | EXPORT_SYMBOL(tipc_acknowledge); |
274 | EXPORT_SYMBOL(tipc_get_port); |
275 | EXPORT_SYMBOL(tipc_get_handle); |
276 | |
277 |
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