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 err = tipc_topsrv_start(net); 81 if (err) 82 goto out_subscr; 83 84 err = tipc_bcast_init(net); 85 if (err) 86 goto out_bclink; 87 88 return 0; 89 90 out_bclink: 91 tipc_bcast_stop(net); 92 out_subscr: 93 tipc_nametbl_stop(net); 94 out_nametbl: 95 tipc_sk_rht_destroy(net); 96 out_sk_rht: 97 return err; 98 } 99 100 static void __net_exit tipc_exit_net(struct net *net) 101 { 102 tipc_topsrv_stop(net); 103 tipc_net_stop(net); 104 tipc_bcast_stop(net); 105 tipc_nametbl_stop(net); 106 tipc_sk_rht_destroy(net); 107 } 108 109 static struct pernet_operations tipc_net_ops = { 110 .init = tipc_init_net, 111 .exit = tipc_exit_net, 112 .id = &tipc_net_id, 113 .size = sizeof(struct tipc_net), 114 }; 115 116 static int __init tipc_init(void) 117 { 118 int err; 119 120 pr_info("Activated (version " TIPC_MOD_VER ")\n"); 121 122 sysctl_tipc_rmem[0] = RCVBUF_MIN; 123 sysctl_tipc_rmem[1] = RCVBUF_DEF; 124 sysctl_tipc_rmem[2] = RCVBUF_MAX; 125 126 err = tipc_netlink_start(); 127 if (err) 128 goto out_netlink; 129 130 err = tipc_netlink_compat_start(); 131 if (err) 132 goto out_netlink_compat; 133 134 err = tipc_socket_init(); 135 if (err) 136 goto out_socket; 137 138 err = tipc_register_sysctl(); 139 if (err) 140 goto out_sysctl; 141 142 err = register_pernet_subsys(&tipc_net_ops); 143 if (err) 144 goto out_pernet; 145 146 err = tipc_bearer_setup(); 147 if (err) 148 goto out_bearer; 149 150 pr_info("Started in single node mode\n"); 151 return 0; 152 out_bearer: 153 unregister_pernet_subsys(&tipc_net_ops); 154 out_pernet: 155 tipc_unregister_sysctl(); 156 out_sysctl: 157 tipc_socket_stop(); 158 out_socket: 159 tipc_netlink_compat_stop(); 160 out_netlink_compat: 161 tipc_netlink_stop(); 162 out_netlink: 163 pr_err("Unable to start in single node mode\n"); 164 return err; 165 } 166 167 static void __exit tipc_exit(void) 168 { 169 tipc_bearer_cleanup(); 170 unregister_pernet_subsys(&tipc_net_ops); 171 tipc_netlink_stop(); 172 tipc_netlink_compat_stop(); 173 tipc_socket_stop(); 174 tipc_unregister_sysctl(); 175 176 pr_info("Deactivated\n"); 177 } 178 179 module_init(tipc_init); 180 module_exit(tipc_exit); 181 182 MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication"); 183 MODULE_LICENSE("Dual BSD/GPL"); 184 MODULE_VERSION(TIPC_MOD_VER); 185