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 */ 50 unsigned int tipc_net_id __read_mostly; 51 int sysctl_tipc_rmem[3] __read_mostly; /* min/default/max */ 52 53 static 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 err = tipc_bcast_init(net); 85 if (err) 86 goto out_bclink; 87 88 err = tipc_attach_loopback(net); 89 if (err) 90 goto out_bclink; 91 92 return 0; 93 94 out_bclink: 95 tipc_nametbl_stop(net); 96 out_nametbl: 97 tipc_sk_rht_destroy(net); 98 out_sk_rht: 99 100 #ifdef CONFIG_TIPC_CRYPTO 101 tipc_crypto_stop(&tn->crypto_tx); 102 out_crypto: 103 #endif 104 return err; 105 } 106 107 static void __net_exit tipc_exit_net(struct net *net) 108 { 109 struct tipc_net *tn = tipc_net(net); 110 111 tipc_detach_loopback(net); 112 /* Make sure the tipc_net_finalize_work() finished */ 113 cancel_work_sync(&tn->work); 114 tipc_net_stop(net); 115 116 tipc_bcast_stop(net); 117 tipc_nametbl_stop(net); 118 tipc_sk_rht_destroy(net); 119 #ifdef CONFIG_TIPC_CRYPTO 120 tipc_crypto_stop(&tipc_net(net)->crypto_tx); 121 #endif 122 while (atomic_read(&tn->wq_count)) 123 cond_resched(); 124 } 125 126 static void __net_exit tipc_pernet_pre_exit(struct net *net) 127 { 128 tipc_node_pre_cleanup_net(net); 129 } 130 131 static struct pernet_operations tipc_pernet_pre_exit_ops = { 132 .pre_exit = tipc_pernet_pre_exit, 133 }; 134 135 static struct pernet_operations tipc_net_ops = { 136 .init = tipc_init_net, 137 .exit = tipc_exit_net, 138 .id = &tipc_net_id, 139 .size = sizeof(struct tipc_net), 140 }; 141 142 static struct pernet_operations tipc_topsrv_net_ops = { 143 .init = tipc_topsrv_init_net, 144 .exit = tipc_topsrv_exit_net, 145 }; 146 147 static int __init tipc_init(void) 148 { 149 int err; 150 151 pr_info("Activated (version " TIPC_MOD_VER ")\n"); 152 153 sysctl_tipc_rmem[0] = RCVBUF_MIN; 154 sysctl_tipc_rmem[1] = RCVBUF_DEF; 155 sysctl_tipc_rmem[2] = RCVBUF_MAX; 156 157 err = tipc_register_sysctl(); 158 if (err) 159 goto out_sysctl; 160 161 err = register_pernet_device(&tipc_net_ops); 162 if (err) 163 goto out_pernet; 164 165 err = tipc_socket_init(); 166 if (err) 167 goto out_socket; 168 169 err = register_pernet_device(&tipc_topsrv_net_ops); 170 if (err) 171 goto out_pernet_topsrv; 172 173 err = register_pernet_subsys(&tipc_pernet_pre_exit_ops); 174 if (err) 175 goto out_register_pernet_subsys; 176 177 err = tipc_bearer_setup(); 178 if (err) 179 goto out_bearer; 180 181 err = tipc_netlink_start(); 182 if (err) 183 goto out_netlink; 184 185 err = tipc_netlink_compat_start(); 186 if (err) 187 goto out_netlink_compat; 188 189 pr_info("Started in single node mode\n"); 190 return 0; 191 192 out_netlink_compat: 193 tipc_netlink_stop(); 194 out_netlink: 195 tipc_bearer_cleanup(); 196 out_bearer: 197 unregister_pernet_subsys(&tipc_pernet_pre_exit_ops); 198 out_register_pernet_subsys: 199 unregister_pernet_device(&tipc_topsrv_net_ops); 200 out_pernet_topsrv: 201 tipc_socket_stop(); 202 out_socket: 203 unregister_pernet_device(&tipc_net_ops); 204 out_pernet: 205 tipc_unregister_sysctl(); 206 out_sysctl: 207 pr_err("Unable to start in single node mode\n"); 208 return err; 209 } 210 211 static void __exit tipc_exit(void) 212 { 213 tipc_netlink_compat_stop(); 214 tipc_netlink_stop(); 215 tipc_bearer_cleanup(); 216 unregister_pernet_subsys(&tipc_pernet_pre_exit_ops); 217 unregister_pernet_device(&tipc_topsrv_net_ops); 218 tipc_socket_stop(); 219 unregister_pernet_device(&tipc_net_ops); 220 tipc_unregister_sysctl(); 221 222 pr_info("Deactivated\n"); 223 } 224 225 module_init(tipc_init); 226 module_exit(tipc_exit); 227 228 MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication"); 229 MODULE_LICENSE("Dual BSD/GPL"); 230 MODULE_VERSION(TIPC_MOD_VER); 231