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