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