]>
Commit | Line | Data |
---|---|---|
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 | ||
b97bf3fd | 37 | #include "core.h" |
b97bf3fd | 38 | #include "ref.h" |
b97bf3fd PL |
39 | #include "name_table.h" |
40 | #include "subscr.h" | |
41 | #include "config.h" | |
42 | ||
b97bf3fd | 43 | |
b97bf3fd PL |
44 | #ifndef CONFIG_TIPC_NODES |
45 | #define CONFIG_TIPC_NODES 255 | |
46 | #endif | |
47 | ||
b97bf3fd PL |
48 | #ifndef CONFIG_TIPC_PORTS |
49 | #define CONFIG_TIPC_PORTS 8191 | |
50 | #endif | |
51 | ||
52 | #ifndef CONFIG_TIPC_LOG | |
53 | #define CONFIG_TIPC_LOG 0 | |
54 | #endif | |
55 | ||
56 | /* global variables used by multiple sub-systems within TIPC */ | |
57 | ||
58 | int tipc_mode = TIPC_NOT_RUNNING; | |
59 | int tipc_random; | |
60 | atomic_t tipc_user_count = ATOMIC_INIT(0); | |
61 | ||
c4307285 | 62 | const char tipc_alphabet[] = |
3a8d1214 | 63 | "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_."; |
b97bf3fd PL |
64 | |
65 | /* configurable TIPC parameters */ | |
66 | ||
67 | u32 tipc_own_addr; | |
b97bf3fd | 68 | int tipc_max_nodes; |
b97bf3fd PL |
69 | int tipc_max_ports; |
70 | int tipc_max_subscriptions; | |
71 | int tipc_max_publications; | |
72 | int tipc_net_id; | |
73 | int tipc_remote_management; | |
74 | ||
75 | ||
3032cca4 | 76 | /** |
31e3c3f6 | 77 | * tipc_buf_acquire - creates a TIPC message buffer |
3032cca4 AS |
78 | * @size: message size (including TIPC header) |
79 | * | |
80 | * Returns a new buffer with data pointers set to the specified size. | |
81 | * | |
82 | * NOTE: Headroom is reserved to allow prepending of a data link header. | |
83 | * There may also be unrequested tailroom present at the buffer's end. | |
84 | */ | |
85 | ||
31e3c3f6 | 86 | struct sk_buff *tipc_buf_acquire(u32 size) |
3032cca4 AS |
87 | { |
88 | struct sk_buff *skb; | |
89 | unsigned int buf_size = (BUF_HEADROOM + size + 3) & ~3u; | |
90 | ||
91 | skb = alloc_skb_fclone(buf_size, GFP_ATOMIC); | |
92 | if (skb) { | |
93 | skb_reserve(skb, BUF_HEADROOM); | |
94 | skb_put(skb, size); | |
95 | skb->next = NULL; | |
96 | } | |
97 | return skb; | |
98 | } | |
99 | ||
b97bf3fd | 100 | /** |
4323add6 | 101 | * tipc_core_stop_net - shut down TIPC networking sub-systems |
b97bf3fd PL |
102 | */ |
103 | ||
31e3c3f6 | 104 | static void tipc_core_stop_net(void) |
b97bf3fd | 105 | { |
4323add6 PL |
106 | tipc_eth_media_stop(); |
107 | tipc_net_stop(); | |
b97bf3fd PL |
108 | } |
109 | ||
110 | /** | |
111 | * start_net - start TIPC networking sub-systems | |
112 | */ | |
113 | ||
03194379 | 114 | int tipc_core_start_net(unsigned long addr) |
b97bf3fd PL |
115 | { |
116 | int res; | |
117 | ||
2db9983a AS |
118 | res = tipc_net_start(addr); |
119 | if (!res) | |
120 | res = tipc_eth_media_start(); | |
121 | if (res) | |
4323add6 | 122 | tipc_core_stop_net(); |
b97bf3fd PL |
123 | return res; |
124 | } | |
125 | ||
126 | /** | |
4323add6 | 127 | * tipc_core_stop - switch TIPC from SINGLE NODE to NOT RUNNING mode |
b97bf3fd PL |
128 | */ |
129 | ||
31e3c3f6 | 130 | static void tipc_core_stop(void) |
b97bf3fd PL |
131 | { |
132 | if (tipc_mode != TIPC_NODE_MODE) | |
133 | return; | |
134 | ||
135 | tipc_mode = TIPC_NOT_RUNNING; | |
136 | ||
4323add6 PL |
137 | tipc_netlink_stop(); |
138 | tipc_handler_stop(); | |
139 | tipc_cfg_stop(); | |
140 | tipc_subscr_stop(); | |
4323add6 PL |
141 | tipc_nametbl_stop(); |
142 | tipc_ref_table_stop(); | |
143 | tipc_socket_stop(); | |
f8138092 | 144 | tipc_log_resize(0); |
b97bf3fd PL |
145 | } |
146 | ||
147 | /** | |
4323add6 | 148 | * tipc_core_start - switch TIPC from NOT RUNNING to SINGLE NODE mode |
b97bf3fd PL |
149 | */ |
150 | ||
31e3c3f6 | 151 | static int tipc_core_start(void) |
b97bf3fd PL |
152 | { |
153 | int res; | |
154 | ||
155 | if (tipc_mode != TIPC_NOT_RUNNING) | |
156 | return -ENOPROTOOPT; | |
157 | ||
158 | get_random_bytes(&tipc_random, sizeof(tipc_random)); | |
159 | tipc_mode = TIPC_NODE_MODE; | |
160 | ||
2db9983a AS |
161 | res = tipc_handler_start(); |
162 | if (!res) | |
163 | res = tipc_ref_table_init(tipc_max_ports, tipc_random); | |
164 | if (!res) | |
165 | res = tipc_nametbl_init(); | |
166 | if (!res) | |
167 | res = tipc_k_signal((Handler)tipc_subscr_start, 0); | |
168 | if (!res) | |
169 | res = tipc_k_signal((Handler)tipc_cfg_init, 0); | |
170 | if (!res) | |
171 | res = tipc_netlink_start(); | |
172 | if (!res) | |
173 | res = tipc_socket_init(); | |
174 | if (res) | |
4323add6 | 175 | tipc_core_stop(); |
2db9983a | 176 | |
b97bf3fd PL |
177 | return res; |
178 | } | |
179 | ||
180 | ||
181 | static int __init tipc_init(void) | |
182 | { | |
183 | int res; | |
184 | ||
f8138092 AK |
185 | if (tipc_log_resize(CONFIG_TIPC_LOG) != 0) |
186 | warn("Unable to create log buffer\n"); | |
187 | ||
c4307285 | 188 | info("Activated (version " TIPC_MOD_VER |
0702056f | 189 | " compiled " __DATE__ " " __TIME__ ")\n"); |
b97bf3fd PL |
190 | |
191 | tipc_own_addr = 0; | |
192 | tipc_remote_management = 1; | |
193 | tipc_max_publications = 10000; | |
194 | tipc_max_subscriptions = 2000; | |
ee983ac7 | 195 | tipc_max_ports = CONFIG_TIPC_PORTS; |
ee983ac7 | 196 | tipc_max_nodes = CONFIG_TIPC_NODES; |
b97bf3fd PL |
197 | tipc_net_id = 4711; |
198 | ||
2db9983a AS |
199 | res = tipc_core_start(); |
200 | if (res) | |
b97bf3fd | 201 | err("Unable to start in single node mode\n"); |
c4307285 | 202 | else |
b97bf3fd | 203 | info("Started in single node mode\n"); |
c4307285 | 204 | return res; |
b97bf3fd PL |
205 | } |
206 | ||
207 | static void __exit tipc_exit(void) | |
208 | { | |
4323add6 PL |
209 | tipc_core_stop_net(); |
210 | tipc_core_stop(); | |
b97bf3fd | 211 | info("Deactivated\n"); |
b97bf3fd PL |
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"); | |
a592ea63 | 219 | MODULE_VERSION(TIPC_MOD_VER); |