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 tn->mon_threshold = TIPC_DEF_MON_THRESHOLD; 61 get_random_bytes(&tn->random, sizeof(int)); 62 INIT_LIST_HEAD(&tn->node_list); 63 spin_lock_init(&tn->node_list_lock); 64 65 err = tipc_sk_rht_init(net); 66 if (err) 67 goto out_sk_rht; 68 69 err = tipc_nametbl_init(net); 70 if (err) 71 goto out_nametbl; 72 73 INIT_LIST_HEAD(&tn->dist_queue); 74 err = tipc_topsrv_start(net); 75 if (err) 76 goto out_subscr; 77 78 err = tipc_bcast_init(net); 79 if (err) 80 goto out_bclink; 81 82 return 0; 83 84 out_bclink: 85 tipc_bcast_stop(net); 86 out_subscr: 87 tipc_nametbl_stop(net); 88 out_nametbl: 89 tipc_sk_rht_destroy(net); 90 out_sk_rht: 91 return err; 92 } 93 94 static void __net_exit tipc_exit_net(struct net *net) 95 { 96 tipc_topsrv_stop(net); 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 int __init tipc_init(void) 111 { 112 int err; 113 114 pr_info("Activated (version " TIPC_MOD_VER ")\n"); 115 116 sysctl_tipc_rmem[0] = RCVBUF_MIN; 117 sysctl_tipc_rmem[1] = RCVBUF_DEF; 118 sysctl_tipc_rmem[2] = RCVBUF_MAX; 119 120 err = tipc_netlink_start(); 121 if (err) 122 goto out_netlink; 123 124 err = tipc_netlink_compat_start(); 125 if (err) 126 goto out_netlink_compat; 127 128 err = tipc_socket_init(); 129 if (err) 130 goto out_socket; 131 132 err = tipc_register_sysctl(); 133 if (err) 134 goto out_sysctl; 135 136 err = register_pernet_subsys(&tipc_net_ops); 137 if (err) 138 goto out_pernet; 139 140 err = tipc_bearer_setup(); 141 if (err) 142 goto out_bearer; 143 144 pr_info("Started in single node mode\n"); 145 return 0; 146 out_bearer: 147 unregister_pernet_subsys(&tipc_net_ops); 148 out_pernet: 149 tipc_unregister_sysctl(); 150 out_sysctl: 151 tipc_socket_stop(); 152 out_socket: 153 tipc_netlink_compat_stop(); 154 out_netlink_compat: 155 tipc_netlink_stop(); 156 out_netlink: 157 pr_err("Unable to start in single node mode\n"); 158 return err; 159 } 160 161 static void __exit tipc_exit(void) 162 { 163 tipc_bearer_cleanup(); 164 unregister_pernet_subsys(&tipc_net_ops); 165 tipc_netlink_stop(); 166 tipc_netlink_compat_stop(); 167 tipc_socket_stop(); 168 tipc_unregister_sysctl(); 169 170 pr_info("Deactivated\n"); 171 } 172 173 module_init(tipc_init); 174 module_exit(tipc_exit); 175 176 MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication"); 177 MODULE_LICENSE("Dual BSD/GPL"); 178 MODULE_VERSION(TIPC_MOD_VER); 179