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