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 int tipc_eth_media_start(void); 52 void tipc_eth_media_stop(void); 53 int tipc_handler_start(void); 54 void tipc_handler_stop(void); 55 int tipc_socket_init(void); 56 void tipc_socket_stop(void); 57 int tipc_netlink_start(void); 58 void tipc_netlink_stop(void); 59 60 #define TIPC_MOD_VER "1.6.1" 61 62 #ifndef CONFIG_TIPC_ZONES 63 #define CONFIG_TIPC_ZONES 3 64 #endif 65 66 #ifndef CONFIG_TIPC_CLUSTERS 67 #define CONFIG_TIPC_CLUSTERS 1 68 #endif 69 70 #ifndef CONFIG_TIPC_NODES 71 #define CONFIG_TIPC_NODES 255 72 #endif 73 74 #ifndef CONFIG_TIPC_SLAVE_NODES 75 #define CONFIG_TIPC_SLAVE_NODES 0 76 #endif 77 78 #ifndef CONFIG_TIPC_PORTS 79 #define CONFIG_TIPC_PORTS 8191 80 #endif 81 82 #ifndef CONFIG_TIPC_LOG 83 #define CONFIG_TIPC_LOG 0 84 #endif 85 86 /* global variables used by multiple sub-systems within TIPC */ 87 88 int tipc_mode = TIPC_NOT_RUNNING; 89 int tipc_random; 90 atomic_t tipc_user_count = ATOMIC_INIT(0); 91 92 const char tipc_alphabet[] = 93 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_"; 94 95 /* configurable TIPC parameters */ 96 97 u32 tipc_own_addr; 98 int tipc_max_zones; 99 int tipc_max_clusters; 100 int tipc_max_nodes; 101 int tipc_max_slaves; 102 int tipc_max_ports; 103 int tipc_max_subscriptions; 104 int tipc_max_publications; 105 int tipc_net_id; 106 int tipc_remote_management; 107 108 109 int tipc_get_mode(void) 110 { 111 return tipc_mode; 112 } 113 114 /** 115 * tipc_core_stop_net - shut down TIPC networking sub-systems 116 */ 117 118 void tipc_core_stop_net(void) 119 { 120 tipc_eth_media_stop(); 121 tipc_net_stop(); 122 } 123 124 /** 125 * start_net - start TIPC networking sub-systems 126 */ 127 128 int tipc_core_start_net(void) 129 { 130 int res; 131 132 if ((res = tipc_net_start()) || 133 (res = tipc_eth_media_start())) { 134 tipc_core_stop_net(); 135 } 136 return res; 137 } 138 139 /** 140 * tipc_core_stop - switch TIPC from SINGLE NODE to NOT RUNNING mode 141 */ 142 143 void tipc_core_stop(void) 144 { 145 if (tipc_mode != TIPC_NODE_MODE) 146 return; 147 148 tipc_mode = TIPC_NOT_RUNNING; 149 150 tipc_netlink_stop(); 151 tipc_handler_stop(); 152 tipc_cfg_stop(); 153 tipc_subscr_stop(); 154 tipc_reg_stop(); 155 tipc_nametbl_stop(); 156 tipc_ref_table_stop(); 157 tipc_socket_stop(); 158 } 159 160 /** 161 * tipc_core_start - switch TIPC from NOT RUNNING to SINGLE NODE mode 162 */ 163 164 int tipc_core_start(void) 165 { 166 int res; 167 168 if (tipc_mode != TIPC_NOT_RUNNING) 169 return -ENOPROTOOPT; 170 171 get_random_bytes(&tipc_random, sizeof(tipc_random)); 172 tipc_mode = TIPC_NODE_MODE; 173 174 if ((res = tipc_handler_start()) || 175 (res = tipc_ref_table_init(tipc_max_ports + tipc_max_subscriptions, 176 tipc_random)) || 177 (res = tipc_reg_start()) || 178 (res = tipc_nametbl_init()) || 179 (res = tipc_k_signal((Handler)tipc_subscr_start, 0)) || 180 (res = tipc_k_signal((Handler)tipc_cfg_init, 0)) || 181 (res = tipc_netlink_start()) || 182 (res = tipc_socket_init())) { 183 tipc_core_stop(); 184 } 185 return res; 186 } 187 188 189 static int __init tipc_init(void) 190 { 191 int res; 192 193 tipc_log_reinit(CONFIG_TIPC_LOG); 194 info("Activated (version " TIPC_MOD_VER 195 " compiled " __DATE__ " " __TIME__ ")\n"); 196 197 tipc_own_addr = 0; 198 tipc_remote_management = 1; 199 tipc_max_publications = 10000; 200 tipc_max_subscriptions = 2000; 201 tipc_max_ports = delimit(CONFIG_TIPC_PORTS, 127, 65536); 202 tipc_max_zones = delimit(CONFIG_TIPC_ZONES, 1, 255); 203 tipc_max_clusters = delimit(CONFIG_TIPC_CLUSTERS, 1, 1); 204 tipc_max_nodes = delimit(CONFIG_TIPC_NODES, 8, 2047); 205 tipc_max_slaves = delimit(CONFIG_TIPC_SLAVE_NODES, 0, 2047); 206 tipc_net_id = 4711; 207 208 if ((res = tipc_core_start())) 209 err("Unable to start in single node mode\n"); 210 else 211 info("Started in single node mode\n"); 212 return res; 213 } 214 215 static void __exit tipc_exit(void) 216 { 217 tipc_core_stop_net(); 218 tipc_core_stop(); 219 info("Deactivated\n"); 220 tipc_log_stop(); 221 } 222 223 module_init(tipc_init); 224 module_exit(tipc_exit); 225 226 MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication"); 227 MODULE_LICENSE("Dual BSD/GPL"); 228 MODULE_VERSION(TIPC_MOD_VER); 229 230 /* Native TIPC API for kernel-space applications (see tipc.h) */ 231 232 EXPORT_SYMBOL(tipc_attach); 233 EXPORT_SYMBOL(tipc_detach); 234 EXPORT_SYMBOL(tipc_get_addr); 235 EXPORT_SYMBOL(tipc_get_mode); 236 EXPORT_SYMBOL(tipc_createport); 237 EXPORT_SYMBOL(tipc_deleteport); 238 EXPORT_SYMBOL(tipc_ownidentity); 239 EXPORT_SYMBOL(tipc_portimportance); 240 EXPORT_SYMBOL(tipc_set_portimportance); 241 EXPORT_SYMBOL(tipc_portunreliable); 242 EXPORT_SYMBOL(tipc_set_portunreliable); 243 EXPORT_SYMBOL(tipc_portunreturnable); 244 EXPORT_SYMBOL(tipc_set_portunreturnable); 245 EXPORT_SYMBOL(tipc_publish); 246 EXPORT_SYMBOL(tipc_withdraw); 247 EXPORT_SYMBOL(tipc_connect2port); 248 EXPORT_SYMBOL(tipc_disconnect); 249 EXPORT_SYMBOL(tipc_shutdown); 250 EXPORT_SYMBOL(tipc_isconnected); 251 EXPORT_SYMBOL(tipc_peer); 252 EXPORT_SYMBOL(tipc_ref_valid); 253 EXPORT_SYMBOL(tipc_send); 254 EXPORT_SYMBOL(tipc_send_buf); 255 EXPORT_SYMBOL(tipc_send2name); 256 EXPORT_SYMBOL(tipc_forward2name); 257 EXPORT_SYMBOL(tipc_send_buf2name); 258 EXPORT_SYMBOL(tipc_forward_buf2name); 259 EXPORT_SYMBOL(tipc_send2port); 260 EXPORT_SYMBOL(tipc_forward2port); 261 EXPORT_SYMBOL(tipc_send_buf2port); 262 EXPORT_SYMBOL(tipc_forward_buf2port); 263 EXPORT_SYMBOL(tipc_multicast); 264 /* EXPORT_SYMBOL(tipc_multicast_buf); not available yet */ 265 EXPORT_SYMBOL(tipc_ispublished); 266 EXPORT_SYMBOL(tipc_available_nodes); 267 268 /* TIPC API for external bearers (see tipc_bearer.h) */ 269 270 EXPORT_SYMBOL(tipc_block_bearer); 271 EXPORT_SYMBOL(tipc_continue); 272 EXPORT_SYMBOL(tipc_disable_bearer); 273 EXPORT_SYMBOL(tipc_enable_bearer); 274 EXPORT_SYMBOL(tipc_recv_msg); 275 EXPORT_SYMBOL(tipc_register_media); 276 277 /* TIPC API for external APIs (see tipc_port.h) */ 278 279 EXPORT_SYMBOL(tipc_createport_raw); 280 EXPORT_SYMBOL(tipc_set_msg_option); 281 EXPORT_SYMBOL(tipc_reject_msg); 282 EXPORT_SYMBOL(tipc_send_buf_fast); 283 EXPORT_SYMBOL(tipc_acknowledge); 284 EXPORT_SYMBOL(tipc_get_port); 285 EXPORT_SYMBOL(tipc_get_handle); 286 287