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Commit | Line | Data |
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b97bf3fd PL |
1 | /* |
2 | * net/tipc/core.c: TIPC module code | |
3 | * | |
9da1c8b6 | 4 | * Copyright (c) 2003-2006, Ericsson AB |
4132faca | 5 | * Copyright (c) 2005-2006, 2010-2011, 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 | ||
3a9a231d PG |
37 | #include <linux/module.h> |
38 | ||
b97bf3fd | 39 | #include "core.h" |
b97bf3fd | 40 | #include "ref.h" |
b97bf3fd PL |
41 | #include "name_table.h" |
42 | #include "subscr.h" | |
43 | #include "config.h" | |
44 | ||
b97bf3fd | 45 | |
b97bf3fd PL |
46 | #ifndef CONFIG_TIPC_PORTS |
47 | #define CONFIG_TIPC_PORTS 8191 | |
48 | #endif | |
49 | ||
50 | #ifndef CONFIG_TIPC_LOG | |
51 | #define CONFIG_TIPC_LOG 0 | |
52 | #endif | |
53 | ||
54 | /* global variables used by multiple sub-systems within TIPC */ | |
55 | ||
56 | int tipc_mode = TIPC_NOT_RUNNING; | |
57 | int tipc_random; | |
b97bf3fd | 58 | |
c4307285 | 59 | const char tipc_alphabet[] = |
3a8d1214 | 60 | "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_."; |
b97bf3fd PL |
61 | |
62 | /* configurable TIPC parameters */ | |
63 | ||
64 | u32 tipc_own_addr; | |
b97bf3fd PL |
65 | int tipc_max_ports; |
66 | int tipc_max_subscriptions; | |
67 | int tipc_max_publications; | |
68 | int tipc_net_id; | |
69 | int tipc_remote_management; | |
70 | ||
71 | ||
3032cca4 | 72 | /** |
31e3c3f6 | 73 | * tipc_buf_acquire - creates a TIPC message buffer |
3032cca4 AS |
74 | * @size: message size (including TIPC header) |
75 | * | |
76 | * Returns a new buffer with data pointers set to the specified size. | |
77 | * | |
78 | * NOTE: Headroom is reserved to allow prepending of a data link header. | |
79 | * There may also be unrequested tailroom present at the buffer's end. | |
80 | */ | |
81 | ||
31e3c3f6 | 82 | struct sk_buff *tipc_buf_acquire(u32 size) |
3032cca4 AS |
83 | { |
84 | struct sk_buff *skb; | |
85 | unsigned int buf_size = (BUF_HEADROOM + size + 3) & ~3u; | |
86 | ||
87 | skb = alloc_skb_fclone(buf_size, GFP_ATOMIC); | |
88 | if (skb) { | |
89 | skb_reserve(skb, BUF_HEADROOM); | |
90 | skb_put(skb, size); | |
91 | skb->next = NULL; | |
92 | } | |
93 | return skb; | |
94 | } | |
95 | ||
b97bf3fd | 96 | /** |
4323add6 | 97 | * tipc_core_stop_net - shut down TIPC networking sub-systems |
b97bf3fd PL |
98 | */ |
99 | ||
31e3c3f6 | 100 | static void tipc_core_stop_net(void) |
b97bf3fd | 101 | { |
4323add6 PL |
102 | tipc_eth_media_stop(); |
103 | tipc_net_stop(); | |
b97bf3fd PL |
104 | } |
105 | ||
106 | /** | |
107 | * start_net - start TIPC networking sub-systems | |
108 | */ | |
109 | ||
03194379 | 110 | int tipc_core_start_net(unsigned long addr) |
b97bf3fd PL |
111 | { |
112 | int res; | |
113 | ||
2db9983a AS |
114 | res = tipc_net_start(addr); |
115 | if (!res) | |
116 | res = tipc_eth_media_start(); | |
117 | if (res) | |
4323add6 | 118 | tipc_core_stop_net(); |
b97bf3fd PL |
119 | return res; |
120 | } | |
121 | ||
122 | /** | |
4323add6 | 123 | * tipc_core_stop - switch TIPC from SINGLE NODE to NOT RUNNING mode |
b97bf3fd PL |
124 | */ |
125 | ||
31e3c3f6 | 126 | static void tipc_core_stop(void) |
b97bf3fd PL |
127 | { |
128 | if (tipc_mode != TIPC_NODE_MODE) | |
129 | return; | |
130 | ||
131 | tipc_mode = TIPC_NOT_RUNNING; | |
132 | ||
4323add6 PL |
133 | tipc_netlink_stop(); |
134 | tipc_handler_stop(); | |
135 | tipc_cfg_stop(); | |
136 | tipc_subscr_stop(); | |
4323add6 PL |
137 | tipc_nametbl_stop(); |
138 | tipc_ref_table_stop(); | |
139 | tipc_socket_stop(); | |
f8138092 | 140 | tipc_log_resize(0); |
b97bf3fd PL |
141 | } |
142 | ||
143 | /** | |
4323add6 | 144 | * tipc_core_start - switch TIPC from NOT RUNNING to SINGLE NODE mode |
b97bf3fd PL |
145 | */ |
146 | ||
31e3c3f6 | 147 | static int tipc_core_start(void) |
b97bf3fd PL |
148 | { |
149 | int res; | |
150 | ||
151 | if (tipc_mode != TIPC_NOT_RUNNING) | |
152 | return -ENOPROTOOPT; | |
153 | ||
154 | get_random_bytes(&tipc_random, sizeof(tipc_random)); | |
155 | tipc_mode = TIPC_NODE_MODE; | |
156 | ||
2db9983a AS |
157 | res = tipc_handler_start(); |
158 | if (!res) | |
159 | res = tipc_ref_table_init(tipc_max_ports, tipc_random); | |
160 | if (!res) | |
161 | res = tipc_nametbl_init(); | |
162 | if (!res) | |
163 | res = tipc_k_signal((Handler)tipc_subscr_start, 0); | |
164 | if (!res) | |
165 | res = tipc_k_signal((Handler)tipc_cfg_init, 0); | |
166 | if (!res) | |
167 | res = tipc_netlink_start(); | |
168 | if (!res) | |
169 | res = tipc_socket_init(); | |
170 | if (res) | |
4323add6 | 171 | tipc_core_stop(); |
2db9983a | 172 | |
b97bf3fd PL |
173 | return res; |
174 | } | |
175 | ||
176 | ||
177 | static int __init tipc_init(void) | |
178 | { | |
179 | int res; | |
180 | ||
f8138092 AK |
181 | if (tipc_log_resize(CONFIG_TIPC_LOG) != 0) |
182 | warn("Unable to create log buffer\n"); | |
183 | ||
97fbdc1f | 184 | info("Activated (version " TIPC_MOD_VER ")\n"); |
b97bf3fd PL |
185 | |
186 | tipc_own_addr = 0; | |
187 | tipc_remote_management = 1; | |
188 | tipc_max_publications = 10000; | |
189 | tipc_max_subscriptions = 2000; | |
ee983ac7 | 190 | tipc_max_ports = CONFIG_TIPC_PORTS; |
b97bf3fd PL |
191 | tipc_net_id = 4711; |
192 | ||
2db9983a AS |
193 | res = tipc_core_start(); |
194 | if (res) | |
b97bf3fd | 195 | err("Unable to start in single node mode\n"); |
c4307285 | 196 | else |
b97bf3fd | 197 | info("Started in single node mode\n"); |
c4307285 | 198 | return res; |
b97bf3fd PL |
199 | } |
200 | ||
201 | static void __exit tipc_exit(void) | |
202 | { | |
4323add6 PL |
203 | tipc_core_stop_net(); |
204 | tipc_core_stop(); | |
b97bf3fd | 205 | info("Deactivated\n"); |
b97bf3fd PL |
206 | } |
207 | ||
208 | module_init(tipc_init); | |
209 | module_exit(tipc_exit); | |
210 | ||
211 | MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication"); | |
212 | MODULE_LICENSE("Dual BSD/GPL"); | |
a592ea63 | 213 | MODULE_VERSION(TIPC_MOD_VER); |