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