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 51int tipc_eth_media_start(void); 52void tipc_eth_media_stop(void); 53int tipc_handler_start(void); 54void tipc_handler_stop(void); 55int tipc_socket_init(void); 56void tipc_socket_stop(void); 57int tipc_netlink_start(void); 58void tipc_netlink_stop(void); 59 60#define TIPC_MOD_VER "1.6.2" 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 88int tipc_mode = TIPC_NOT_RUNNING; 89int tipc_random; 90atomic_t tipc_user_count = ATOMIC_INIT(0); 91 92const char tipc_alphabet[] = 93 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_."; 94 95/* configurable TIPC parameters */ 96 97u32 tipc_own_addr; 98int tipc_max_zones; 99int tipc_max_clusters; 100int tipc_max_nodes; 101int tipc_max_slaves; 102int tipc_max_ports; 103int tipc_max_subscriptions; 104int tipc_max_publications; 105int tipc_net_id; 106int tipc_remote_management; 107 108 109int 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 118void 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 128int 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 143void 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 164int 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 189static 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 215static 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 223module_init(tipc_init); 224module_exit(tipc_exit); 225 226MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication"); 227MODULE_LICENSE("Dual BSD/GPL"); 228MODULE_VERSION(TIPC_MOD_VER); 229 230/* Native TIPC API for kernel-space applications (see tipc.h) */ 231 232EXPORT_SYMBOL(tipc_attach); 233EXPORT_SYMBOL(tipc_detach); 234EXPORT_SYMBOL(tipc_get_addr); 235EXPORT_SYMBOL(tipc_get_mode); 236EXPORT_SYMBOL(tipc_createport); 237EXPORT_SYMBOL(tipc_deleteport); 238EXPORT_SYMBOL(tipc_ownidentity); 239EXPORT_SYMBOL(tipc_portimportance); 240EXPORT_SYMBOL(tipc_set_portimportance); 241EXPORT_SYMBOL(tipc_portunreliable); 242EXPORT_SYMBOL(tipc_set_portunreliable); 243EXPORT_SYMBOL(tipc_portunreturnable); 244EXPORT_SYMBOL(tipc_set_portunreturnable); 245EXPORT_SYMBOL(tipc_publish); 246EXPORT_SYMBOL(tipc_withdraw); 247EXPORT_SYMBOL(tipc_connect2port); 248EXPORT_SYMBOL(tipc_disconnect); 249EXPORT_SYMBOL(tipc_shutdown); 250EXPORT_SYMBOL(tipc_isconnected); 251EXPORT_SYMBOL(tipc_peer); 252EXPORT_SYMBOL(tipc_ref_valid); 253EXPORT_SYMBOL(tipc_send); 254EXPORT_SYMBOL(tipc_send_buf); 255EXPORT_SYMBOL(tipc_send2name); 256EXPORT_SYMBOL(tipc_forward2name); 257EXPORT_SYMBOL(tipc_send_buf2name); 258EXPORT_SYMBOL(tipc_forward_buf2name); 259EXPORT_SYMBOL(tipc_send2port); 260EXPORT_SYMBOL(tipc_forward2port); 261EXPORT_SYMBOL(tipc_send_buf2port); 262EXPORT_SYMBOL(tipc_forward_buf2port); 263EXPORT_SYMBOL(tipc_multicast); 264/* EXPORT_SYMBOL(tipc_multicast_buf); not available yet */ 265EXPORT_SYMBOL(tipc_ispublished); 266EXPORT_SYMBOL(tipc_available_nodes); 267 268/* TIPC API for external bearers (see tipc_bearer.h) */ 269 270EXPORT_SYMBOL(tipc_block_bearer); 271EXPORT_SYMBOL(tipc_continue); 272EXPORT_SYMBOL(tipc_disable_bearer); 273EXPORT_SYMBOL(tipc_enable_bearer); 274EXPORT_SYMBOL(tipc_recv_msg); 275EXPORT_SYMBOL(tipc_register_media); 276 277/* TIPC API for external APIs (see tipc_port.h) */ 278 279EXPORT_SYMBOL(tipc_createport_raw); 280EXPORT_SYMBOL(tipc_set_msg_option); 281EXPORT_SYMBOL(tipc_reject_msg); 282EXPORT_SYMBOL(tipc_send_buf_fast); 283EXPORT_SYMBOL(tipc_acknowledge); 284EXPORT_SYMBOL(tipc_get_port); 285EXPORT_SYMBOL(tipc_get_handle); 286