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 = delimit(CONFIG_TIPC_PORTS, 127, 65536); 193 tipc_max_zones = delimit(CONFIG_TIPC_ZONES, 1, 255); 194 tipc_max_clusters = delimit(CONFIG_TIPC_CLUSTERS, 1, 1); 195 tipc_max_nodes = delimit(CONFIG_TIPC_NODES, 8, 2047); 196 tipc_max_slaves = delimit(CONFIG_TIPC_SLAVE_NODES, 0, 2047); 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