1/* 2 * net/tipc/core.c: TIPC module code 3 * 4 * Copyright (c) 2003-2006, 2013, Ericsson AB 5 * Copyright (c) 2005-2006, 2010-2013, 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 "core.h" 38#include "name_table.h" 39#include "subscr.h" 40#include "bearer.h" 41#include "net.h" 42#include "socket.h" 43#include "bcast.h" 44#include "node.h" 45#include "crypto.h" 46 47#include <linux/module.h> 48 49/* configurable TIPC parameters */ 50unsigned int tipc_net_id __read_mostly; 51int sysctl_tipc_rmem[3] __read_mostly; /* min/default/max */ 52 53static int __net_init tipc_init_net(struct net *net) 54{ 55 struct tipc_net *tn = net_generic(net, tipc_net_id); 56 int err; 57 58 tn->net_id = 4711; 59 tn->node_addr = 0; 60 tn->trial_addr = 0; 61 tn->addr_trial_end = 0; 62 tn->capabilities = TIPC_NODE_CAPABILITIES; 63 INIT_WORK(&tn->work, tipc_net_finalize_work); 64 memset(tn->node_id, 0, sizeof(tn->node_id)); 65 memset(tn->node_id_string, 0, sizeof(tn->node_id_string)); 66 tn->mon_threshold = TIPC_DEF_MON_THRESHOLD; 67 get_random_bytes(&tn->random, sizeof(int)); 68 INIT_LIST_HEAD(&tn->node_list); 69 spin_lock_init(&tn->node_list_lock); 70 71#ifdef CONFIG_TIPC_CRYPTO 72 err = tipc_crypto_start(&tn->crypto_tx, net, NULL); 73 if (err) 74 goto out_crypto; 75#endif 76 err = tipc_sk_rht_init(net); 77 if (err) 78 goto out_sk_rht; 79 80 err = tipc_nametbl_init(net); 81 if (err) 82 goto out_nametbl; 83 84 INIT_LIST_HEAD(&tn->dist_queue); 85 86 err = tipc_bcast_init(net); 87 if (err) 88 goto out_bclink; 89 90 err = tipc_attach_loopback(net); 91 if (err) 92 goto out_bclink; 93 94 return 0; 95 96out_bclink: 97 tipc_nametbl_stop(net); 98out_nametbl: 99 tipc_sk_rht_destroy(net); 100out_sk_rht: 101 102#ifdef CONFIG_TIPC_CRYPTO 103 tipc_crypto_stop(&tn->crypto_tx); 104out_crypto: 105#endif 106 return err; 107} 108 109static void __net_exit tipc_exit_net(struct net *net) 110{ 111 struct tipc_net *tn = tipc_net(net); 112 113 tipc_detach_loopback(net); 114 tipc_net_stop(net); 115 /* Make sure the tipc_net_finalize_work() finished */ 116 cancel_work_sync(&tn->work); 117 tipc_bcast_stop(net); 118 tipc_nametbl_stop(net); 119 tipc_sk_rht_destroy(net); 120#ifdef CONFIG_TIPC_CRYPTO 121 tipc_crypto_stop(&tipc_net(net)->crypto_tx); 122#endif 123 while (atomic_read(&tn->wq_count)) 124 cond_resched(); 125} 126 127static void __net_exit tipc_pernet_pre_exit(struct net *net) 128{ 129 tipc_node_pre_cleanup_net(net); 130} 131 132static struct pernet_operations tipc_pernet_pre_exit_ops = { 133 .pre_exit = tipc_pernet_pre_exit, 134}; 135 136static struct pernet_operations tipc_net_ops = { 137 .init = tipc_init_net, 138 .exit = tipc_exit_net, 139 .id = &tipc_net_id, 140 .size = sizeof(struct tipc_net), 141}; 142 143static struct pernet_operations tipc_topsrv_net_ops = { 144 .init = tipc_topsrv_init_net, 145 .exit = tipc_topsrv_exit_net, 146}; 147 148static int __init tipc_init(void) 149{ 150 int err; 151 152 pr_info("Activated (version " TIPC_MOD_VER ")\n"); 153 154 sysctl_tipc_rmem[0] = RCVBUF_MIN; 155 sysctl_tipc_rmem[1] = RCVBUF_DEF; 156 sysctl_tipc_rmem[2] = RCVBUF_MAX; 157 158 err = tipc_register_sysctl(); 159 if (err) 160 goto out_sysctl; 161 162 err = register_pernet_device(&tipc_net_ops); 163 if (err) 164 goto out_pernet; 165 166 err = tipc_socket_init(); 167 if (err) 168 goto out_socket; 169 170 err = register_pernet_device(&tipc_topsrv_net_ops); 171 if (err) 172 goto out_pernet_topsrv; 173 174 err = register_pernet_subsys(&tipc_pernet_pre_exit_ops); 175 if (err) 176 goto out_register_pernet_subsys; 177 178 err = tipc_bearer_setup(); 179 if (err) 180 goto out_bearer; 181 182 err = tipc_netlink_start(); 183 if (err) 184 goto out_netlink; 185 186 err = tipc_netlink_compat_start(); 187 if (err) 188 goto out_netlink_compat; 189 190 pr_info("Started in single node mode\n"); 191 return 0; 192 193out_netlink_compat: 194 tipc_netlink_stop(); 195out_netlink: 196 tipc_bearer_cleanup(); 197out_bearer: 198 unregister_pernet_subsys(&tipc_pernet_pre_exit_ops); 199out_register_pernet_subsys: 200 unregister_pernet_device(&tipc_topsrv_net_ops); 201out_pernet_topsrv: 202 tipc_socket_stop(); 203out_socket: 204 unregister_pernet_device(&tipc_net_ops); 205out_pernet: 206 tipc_unregister_sysctl(); 207out_sysctl: 208 pr_err("Unable to start in single node mode\n"); 209 return err; 210} 211 212static void __exit tipc_exit(void) 213{ 214 tipc_netlink_compat_stop(); 215 tipc_netlink_stop(); 216 tipc_bearer_cleanup(); 217 unregister_pernet_subsys(&tipc_pernet_pre_exit_ops); 218 unregister_pernet_device(&tipc_topsrv_net_ops); 219 tipc_socket_stop(); 220 unregister_pernet_device(&tipc_net_ops); 221 tipc_unregister_sysctl(); 222 223 pr_info("Deactivated\n"); 224} 225 226module_init(tipc_init); 227module_exit(tipc_exit); 228 229MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication"); 230MODULE_LICENSE("Dual BSD/GPL"); 231MODULE_VERSION(TIPC_MOD_VER); 232