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b97bf3fd PL |
1 | /* |
2 | * net/tipc/core.c: TIPC module code | |
3 | * | |
9da1c8b6 | 4 | * Copyright (c) 2003-2006, Ericsson AB |
a592ea63 | 5 | * Copyright (c) 2005-2006, Wind River Systems |
b97bf3fd PL |
6 | * All rights reserved. |
7 | * | |
9ea1fd3c | 8 | * Redistribution and use in source and binary forms, with or without |
b97bf3fd PL |
9 | * modification, are permitted provided that the following conditions are met: |
10 | * | |
9ea1fd3c PL |
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. | |
b97bf3fd | 19 | * |
9ea1fd3c PL |
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 | |
b97bf3fd PL |
34 | * POSSIBILITY OF SUCH DAMAGE. |
35 | */ | |
36 | ||
37 | #include <linux/init.h> | |
38 | #include <linux/module.h> | |
39 | #include <linux/kernel.h> | |
b97bf3fd PL |
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 | ||
b97bf3fd | 51 | |
b97bf3fd PL |
52 | #ifndef CONFIG_TIPC_ZONES |
53 | #define CONFIG_TIPC_ZONES 3 | |
54 | #endif | |
55 | ||
56 | #ifndef CONFIG_TIPC_CLUSTERS | |
57 | #define CONFIG_TIPC_CLUSTERS 1 | |
58 | #endif | |
59 | ||
60 | #ifndef CONFIG_TIPC_NODES | |
61 | #define CONFIG_TIPC_NODES 255 | |
62 | #endif | |
63 | ||
64 | #ifndef CONFIG_TIPC_SLAVE_NODES | |
65 | #define CONFIG_TIPC_SLAVE_NODES 0 | |
66 | #endif | |
67 | ||
68 | #ifndef CONFIG_TIPC_PORTS | |
69 | #define CONFIG_TIPC_PORTS 8191 | |
70 | #endif | |
71 | ||
72 | #ifndef CONFIG_TIPC_LOG | |
73 | #define CONFIG_TIPC_LOG 0 | |
74 | #endif | |
75 | ||
76 | /* global variables used by multiple sub-systems within TIPC */ | |
77 | ||
78 | int tipc_mode = TIPC_NOT_RUNNING; | |
79 | int tipc_random; | |
80 | atomic_t tipc_user_count = ATOMIC_INIT(0); | |
81 | ||
c4307285 | 82 | const char tipc_alphabet[] = |
3a8d1214 | 83 | "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_."; |
b97bf3fd PL |
84 | |
85 | /* configurable TIPC parameters */ | |
86 | ||
87 | u32 tipc_own_addr; | |
88 | int tipc_max_zones; | |
89 | int tipc_max_clusters; | |
90 | int tipc_max_nodes; | |
91 | int tipc_max_slaves; | |
92 | int tipc_max_ports; | |
93 | int tipc_max_subscriptions; | |
94 | int tipc_max_publications; | |
95 | int tipc_net_id; | |
96 | int tipc_remote_management; | |
97 | ||
98 | ||
3032cca4 | 99 | /** |
31e3c3f6 | 100 | * tipc_buf_acquire - creates a TIPC message buffer |
3032cca4 AS |
101 | * @size: message size (including TIPC header) |
102 | * | |
103 | * Returns a new buffer with data pointers set to the specified size. | |
104 | * | |
105 | * NOTE: Headroom is reserved to allow prepending of a data link header. | |
106 | * There may also be unrequested tailroom present at the buffer's end. | |
107 | */ | |
108 | ||
31e3c3f6 | 109 | struct sk_buff *tipc_buf_acquire(u32 size) |
3032cca4 AS |
110 | { |
111 | struct sk_buff *skb; | |
112 | unsigned int buf_size = (BUF_HEADROOM + size + 3) & ~3u; | |
113 | ||
114 | skb = alloc_skb_fclone(buf_size, GFP_ATOMIC); | |
115 | if (skb) { | |
116 | skb_reserve(skb, BUF_HEADROOM); | |
117 | skb_put(skb, size); | |
118 | skb->next = NULL; | |
119 | } | |
120 | return skb; | |
121 | } | |
122 | ||
b97bf3fd | 123 | /** |
4323add6 | 124 | * tipc_core_stop_net - shut down TIPC networking sub-systems |
b97bf3fd PL |
125 | */ |
126 | ||
31e3c3f6 | 127 | static void tipc_core_stop_net(void) |
b97bf3fd | 128 | { |
4323add6 PL |
129 | tipc_eth_media_stop(); |
130 | tipc_net_stop(); | |
b97bf3fd PL |
131 | } |
132 | ||
133 | /** | |
134 | * start_net - start TIPC networking sub-systems | |
135 | */ | |
136 | ||
03194379 | 137 | int tipc_core_start_net(unsigned long addr) |
b97bf3fd PL |
138 | { |
139 | int res; | |
140 | ||
03194379 | 141 | if ((res = tipc_net_start(addr)) || |
4323add6 PL |
142 | (res = tipc_eth_media_start())) { |
143 | tipc_core_stop_net(); | |
b97bf3fd PL |
144 | } |
145 | return res; | |
146 | } | |
147 | ||
148 | /** | |
4323add6 | 149 | * tipc_core_stop - switch TIPC from SINGLE NODE to NOT RUNNING mode |
b97bf3fd PL |
150 | */ |
151 | ||
31e3c3f6 | 152 | static void tipc_core_stop(void) |
b97bf3fd PL |
153 | { |
154 | if (tipc_mode != TIPC_NODE_MODE) | |
155 | return; | |
156 | ||
157 | tipc_mode = TIPC_NOT_RUNNING; | |
158 | ||
4323add6 PL |
159 | tipc_netlink_stop(); |
160 | tipc_handler_stop(); | |
161 | tipc_cfg_stop(); | |
162 | tipc_subscr_stop(); | |
163 | tipc_reg_stop(); | |
164 | tipc_nametbl_stop(); | |
165 | tipc_ref_table_stop(); | |
166 | tipc_socket_stop(); | |
f8138092 | 167 | tipc_log_resize(0); |
b97bf3fd PL |
168 | } |
169 | ||
170 | /** | |
4323add6 | 171 | * tipc_core_start - switch TIPC from NOT RUNNING to SINGLE NODE mode |
b97bf3fd PL |
172 | */ |
173 | ||
31e3c3f6 | 174 | static int tipc_core_start(void) |
b97bf3fd PL |
175 | { |
176 | int res; | |
177 | ||
178 | if (tipc_mode != TIPC_NOT_RUNNING) | |
179 | return -ENOPROTOOPT; | |
180 | ||
181 | get_random_bytes(&tipc_random, sizeof(tipc_random)); | |
182 | tipc_mode = TIPC_NODE_MODE; | |
183 | ||
c4307285 | 184 | if ((res = tipc_handler_start()) || |
28353e7f | 185 | (res = tipc_ref_table_init(tipc_max_ports, tipc_random)) || |
4323add6 PL |
186 | (res = tipc_reg_start()) || |
187 | (res = tipc_nametbl_init()) || | |
c4307285 YH |
188 | (res = tipc_k_signal((Handler)tipc_subscr_start, 0)) || |
189 | (res = tipc_k_signal((Handler)tipc_cfg_init, 0)) || | |
4323add6 PL |
190 | (res = tipc_netlink_start()) || |
191 | (res = tipc_socket_init())) { | |
192 | tipc_core_stop(); | |
b97bf3fd PL |
193 | } |
194 | return res; | |
195 | } | |
196 | ||
197 | ||
198 | static int __init tipc_init(void) | |
199 | { | |
200 | int res; | |
201 | ||
f8138092 AK |
202 | if (tipc_log_resize(CONFIG_TIPC_LOG) != 0) |
203 | warn("Unable to create log buffer\n"); | |
204 | ||
c4307285 | 205 | info("Activated (version " TIPC_MOD_VER |
0702056f | 206 | " compiled " __DATE__ " " __TIME__ ")\n"); |
b97bf3fd PL |
207 | |
208 | tipc_own_addr = 0; | |
209 | tipc_remote_management = 1; | |
210 | tipc_max_publications = 10000; | |
211 | tipc_max_subscriptions = 2000; | |
ee983ac7 AW |
212 | tipc_max_ports = CONFIG_TIPC_PORTS; |
213 | tipc_max_zones = CONFIG_TIPC_ZONES; | |
214 | tipc_max_clusters = CONFIG_TIPC_CLUSTERS; | |
215 | tipc_max_nodes = CONFIG_TIPC_NODES; | |
216 | tipc_max_slaves = CONFIG_TIPC_SLAVE_NODES; | |
b97bf3fd PL |
217 | tipc_net_id = 4711; |
218 | ||
4323add6 | 219 | if ((res = tipc_core_start())) |
b97bf3fd | 220 | err("Unable to start in single node mode\n"); |
c4307285 | 221 | else |
b97bf3fd | 222 | info("Started in single node mode\n"); |
c4307285 | 223 | return res; |
b97bf3fd PL |
224 | } |
225 | ||
226 | static void __exit tipc_exit(void) | |
227 | { | |
4323add6 PL |
228 | tipc_core_stop_net(); |
229 | tipc_core_stop(); | |
b97bf3fd | 230 | info("Deactivated\n"); |
b97bf3fd PL |
231 | } |
232 | ||
233 | module_init(tipc_init); | |
234 | module_exit(tipc_exit); | |
235 | ||
236 | MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication"); | |
237 | MODULE_LICENSE("Dual BSD/GPL"); | |
a592ea63 | 238 | MODULE_VERSION(TIPC_MOD_VER); |
b97bf3fd PL |
239 | |
240 | /* Native TIPC API for kernel-space applications (see tipc.h) */ | |
241 | ||
242 | EXPORT_SYMBOL(tipc_attach); | |
243 | EXPORT_SYMBOL(tipc_detach); | |
b97bf3fd PL |
244 | EXPORT_SYMBOL(tipc_createport); |
245 | EXPORT_SYMBOL(tipc_deleteport); | |
246 | EXPORT_SYMBOL(tipc_ownidentity); | |
247 | EXPORT_SYMBOL(tipc_portimportance); | |
248 | EXPORT_SYMBOL(tipc_set_portimportance); | |
249 | EXPORT_SYMBOL(tipc_portunreliable); | |
250 | EXPORT_SYMBOL(tipc_set_portunreliable); | |
251 | EXPORT_SYMBOL(tipc_portunreturnable); | |
252 | EXPORT_SYMBOL(tipc_set_portunreturnable); | |
253 | EXPORT_SYMBOL(tipc_publish); | |
254 | EXPORT_SYMBOL(tipc_withdraw); | |
255 | EXPORT_SYMBOL(tipc_connect2port); | |
256 | EXPORT_SYMBOL(tipc_disconnect); | |
257 | EXPORT_SYMBOL(tipc_shutdown); | |
b97bf3fd | 258 | EXPORT_SYMBOL(tipc_send); |
b97bf3fd | 259 | EXPORT_SYMBOL(tipc_send2name); |
b97bf3fd | 260 | EXPORT_SYMBOL(tipc_send2port); |
b97bf3fd | 261 | EXPORT_SYMBOL(tipc_multicast); |
b97bf3fd PL |
262 | |
263 | /* TIPC API for external bearers (see tipc_bearer.h) */ | |
264 | ||
265 | EXPORT_SYMBOL(tipc_block_bearer); | |
c4307285 | 266 | EXPORT_SYMBOL(tipc_continue); |
b97bf3fd PL |
267 | EXPORT_SYMBOL(tipc_disable_bearer); |
268 | EXPORT_SYMBOL(tipc_enable_bearer); | |
269 | EXPORT_SYMBOL(tipc_recv_msg); | |
c4307285 | 270 | EXPORT_SYMBOL(tipc_register_media); |
b97bf3fd PL |
271 | |
272 | /* TIPC API for external APIs (see tipc_port.h) */ | |
273 | ||
274 | EXPORT_SYMBOL(tipc_createport_raw); | |
b97bf3fd PL |
275 | EXPORT_SYMBOL(tipc_reject_msg); |
276 | EXPORT_SYMBOL(tipc_send_buf_fast); | |
277 | EXPORT_SYMBOL(tipc_acknowledge); | |
b97bf3fd | 278 |