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 46 #include <linux/module.h> 47 48 /* configurable TIPC parameters */ 49 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->own_addr = 0; 59 get_random_bytes(&tn->random, sizeof(int)); 60 INIT_LIST_HEAD(&tn->node_list); 61 spin_lock_init(&tn->node_list_lock); 62 63 err = tipc_sk_rht_init(net); 64 if (err) 65 goto out_sk_rht; 66 67 err = tipc_nametbl_init(net); 68 if (err) 69 goto out_nametbl; 70 71 err = tipc_subscr_start(net); 72 if (err) 73 goto out_subscr; 74 return 0; 75 76 out_subscr: 77 tipc_nametbl_stop(net); 78 out_nametbl: 79 tipc_sk_rht_destroy(net); 80 out_sk_rht: 81 return err; 82 } 83 84 static void __net_exit tipc_exit_net(struct net *net) 85 { 86 tipc_subscr_stop(net); 87 tipc_net_stop(net); 88 tipc_nametbl_stop(net); 89 tipc_sk_rht_destroy(net); 90 } 91 92 static struct pernet_operations tipc_net_ops = { 93 .init = tipc_init_net, 94 .exit = tipc_exit_net, 95 .id = &tipc_net_id, 96 .size = sizeof(struct tipc_net), 97 }; 98 99 static int __init tipc_init(void) 100 { 101 int err; 102 103 pr_info("Activated (version " TIPC_MOD_VER ")\n"); 104 105 sysctl_tipc_rmem[0] = TIPC_CONN_OVERLOAD_LIMIT >> 4 << 106 TIPC_LOW_IMPORTANCE; 107 sysctl_tipc_rmem[1] = TIPC_CONN_OVERLOAD_LIMIT >> 4 << 108 TIPC_CRITICAL_IMPORTANCE; 109 sysctl_tipc_rmem[2] = TIPC_CONN_OVERLOAD_LIMIT; 110 111 err = tipc_netlink_start(); 112 if (err) 113 goto out_netlink; 114 115 err = tipc_netlink_compat_start(); 116 if (err) 117 goto out_netlink_compat; 118 119 err = tipc_socket_init(); 120 if (err) 121 goto out_socket; 122 123 err = tipc_register_sysctl(); 124 if (err) 125 goto out_sysctl; 126 127 err = register_pernet_subsys(&tipc_net_ops); 128 if (err) 129 goto out_pernet; 130 131 err = tipc_bearer_setup(); 132 if (err) 133 goto out_bearer; 134 135 pr_info("Started in single node mode\n"); 136 return 0; 137 out_bearer: 138 unregister_pernet_subsys(&tipc_net_ops); 139 out_pernet: 140 tipc_unregister_sysctl(); 141 out_sysctl: 142 tipc_socket_stop(); 143 out_socket: 144 tipc_netlink_compat_stop(); 145 out_netlink_compat: 146 tipc_netlink_stop(); 147 out_netlink: 148 pr_err("Unable to start in single node mode\n"); 149 return err; 150 } 151 152 static void __exit tipc_exit(void) 153 { 154 tipc_bearer_cleanup(); 155 unregister_pernet_subsys(&tipc_net_ops); 156 tipc_netlink_stop(); 157 tipc_netlink_compat_stop(); 158 tipc_socket_stop(); 159 tipc_unregister_sysctl(); 160 161 pr_info("Deactivated\n"); 162 } 163 164 module_init(tipc_init); 165 module_exit(tipc_exit); 166 167 MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication"); 168 MODULE_LICENSE("Dual BSD/GPL"); 169 MODULE_VERSION(TIPC_MOD_VER); 170