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 return 0; 86 87 out_bclink: 88 tipc_nametbl_stop(net); 89 out_nametbl: 90 tipc_sk_rht_destroy(net); 91 out_sk_rht: 92 return err; 93 } 94 95 static void __net_exit tipc_exit_net(struct net *net) 96 { 97 tipc_net_stop(net); 98 tipc_bcast_stop(net); 99 tipc_nametbl_stop(net); 100 tipc_sk_rht_destroy(net); 101 } 102 103 static struct pernet_operations tipc_net_ops = { 104 .init = tipc_init_net, 105 .exit = tipc_exit_net, 106 .id = &tipc_net_id, 107 .size = sizeof(struct tipc_net), 108 }; 109 110 static struct pernet_operations tipc_topsrv_net_ops = { 111 .init = tipc_topsrv_init_net, 112 .exit = tipc_topsrv_exit_net, 113 }; 114 115 static int __init tipc_init(void) 116 { 117 int err; 118 119 pr_info("Activated (version " TIPC_MOD_VER ")\n"); 120 121 sysctl_tipc_rmem[0] = RCVBUF_MIN; 122 sysctl_tipc_rmem[1] = RCVBUF_DEF; 123 sysctl_tipc_rmem[2] = RCVBUF_MAX; 124 125 err = tipc_netlink_start(); 126 if (err) 127 goto out_netlink; 128 129 err = tipc_netlink_compat_start(); 130 if (err) 131 goto out_netlink_compat; 132 133 err = tipc_register_sysctl(); 134 if (err) 135 goto out_sysctl; 136 137 err = register_pernet_device(&tipc_net_ops); 138 if (err) 139 goto out_pernet; 140 141 err = tipc_socket_init(); 142 if (err) 143 goto out_socket; 144 145 err = register_pernet_device(&tipc_topsrv_net_ops); 146 if (err) 147 goto out_pernet_topsrv; 148 149 err = tipc_bearer_setup(); 150 if (err) 151 goto out_bearer; 152 153 pr_info("Started in single node mode\n"); 154 return 0; 155 out_bearer: 156 unregister_pernet_device(&tipc_topsrv_net_ops); 157 out_pernet_topsrv: 158 tipc_socket_stop(); 159 out_socket: 160 unregister_pernet_device(&tipc_net_ops); 161 out_pernet: 162 tipc_unregister_sysctl(); 163 out_sysctl: 164 tipc_netlink_compat_stop(); 165 out_netlink_compat: 166 tipc_netlink_stop(); 167 out_netlink: 168 pr_err("Unable to start in single node mode\n"); 169 return err; 170 } 171 172 static void __exit tipc_exit(void) 173 { 174 tipc_bearer_cleanup(); 175 unregister_pernet_device(&tipc_topsrv_net_ops); 176 tipc_socket_stop(); 177 unregister_pernet_device(&tipc_net_ops); 178 tipc_netlink_stop(); 179 tipc_netlink_compat_stop(); 180 tipc_unregister_sysctl(); 181 182 pr_info("Deactivated\n"); 183 } 184 185 module_init(tipc_init); 186 module_exit(tipc_exit); 187 188 MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication"); 189 MODULE_LICENSE("Dual BSD/GPL"); 190 MODULE_VERSION(TIPC_MOD_VER); 191