| 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 | #include "core.h"
|
| 38 | #include "name_table.h"
|
| 39 | #include "subscr.h"
|
| 40 | #include "bearer.h"
|
| 41 | #include "net.h"
|
| 42 | #include "socket.h"
|
| 43 | #include "bcast.h"
|
| 44 | #include "node.h"
|
| 45 | #include "crypto.h"
|
| 46 |
|
| 47 | #include <linux/module.h>
|
| 48 | #include <linux/wait_bit.h>
|
| 49 |
|
| 50 |
|
| 51 | unsigned int tipc_net_id __read_mostly;
|
| 52 | int sysctl_tipc_rmem[3] __read_mostly;
|
| 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 | INIT_WORK(&tn->work, tipc_net_finalize_work);
|
| 65 | memset(tn->node_id, 0, sizeof(tn->node_id));
|
| 66 | memset(tn->node_id_string, 0, sizeof(tn->node_id_string));
|
| 67 | tn->mon_threshold = TIPC_DEF_MON_THRESHOLD;
|
| 68 | get_random_bytes(&tn->random, sizeof(int));
|
| 69 | INIT_LIST_HEAD(&tn->node_list);
|
| 70 | spin_lock_init(&tn->node_list_lock);
|
| 71 |
|
| 72 | #ifdef CONFIG_TIPC_CRYPTO
|
| 73 | err = tipc_crypto_start(&tn->crypto_tx, net, NULL);
|
| 74 | if (err)
|
| 75 | goto out_crypto;
|
| 76 | #endif
|
| 77 | err = tipc_sk_rht_init(net);
|
| 78 | if (err)
|
| 79 | goto out_sk_rht;
|
| 80 |
|
| 81 | err = tipc_nametbl_init(net);
|
| 82 | if (err)
|
| 83 | goto out_nametbl;
|
| 84 |
|
| 85 | err = tipc_bcast_init(net);
|
| 86 | if (err)
|
| 87 | goto out_bclink;
|
| 88 |
|
| 89 | err = tipc_attach_loopback(net);
|
| 90 | if (err)
|
| 91 | goto out_bclink;
|
| 92 |
|
| 93 | return 0;
|
| 94 |
|
| 95 | out_bclink:
|
| 96 | tipc_nametbl_stop(net);
|
| 97 | out_nametbl:
|
| 98 | tipc_sk_rht_destroy(net);
|
| 99 | out_sk_rht:
|
| 100 |
|
| 101 | #ifdef CONFIG_TIPC_CRYPTO
|
| 102 | tipc_crypto_stop(&tn->crypto_tx);
|
| 103 | out_crypto:
|
| 104 | #endif
|
| 105 | return err;
|
| 106 | }
|
| 107 |
|
| 108 | static void __net_exit tipc_exit_net(struct net *net)
|
| 109 | {
|
| 110 | struct tipc_net *tn = tipc_net(net);
|
| 111 |
|
| 112 | tipc_detach_loopback(net);
|
| 113 | tipc_net_stop(net);
|
| 114 |
|
| 115 | cancel_work_sync(&tn->work);
|
| 116 | tipc_bcast_stop(net);
|
| 117 | tipc_nametbl_stop(net);
|
| 118 | tipc_sk_rht_destroy(net);
|
| 119 | #ifdef CONFIG_TIPC_CRYPTO
|
| 120 | tipc_crypto_stop(&tipc_net(net)->crypto_tx);
|
| 121 | #endif
|
| 122 | wait_var_event(&tn->wq_count, atomic_read(&tn->wq_count) == 0);
|
| 123 | }
|
| 124 |
|
| 125 | static void __net_exit tipc_pernet_pre_exit(struct net *net)
|
| 126 | {
|
| 127 | tipc_node_pre_cleanup_net(net);
|
| 128 | }
|
| 129 |
|
| 130 | static struct pernet_operations tipc_pernet_pre_exit_ops = {
|
| 131 | .pre_exit = tipc_pernet_pre_exit,
|
| 132 | };
|
| 133 |
|
| 134 | static struct pernet_operations tipc_net_ops = {
|
| 135 | .init = tipc_init_net,
|
| 136 | .exit = tipc_exit_net,
|
| 137 | .id = &tipc_net_id,
|
| 138 | .size = sizeof(struct tipc_net),
|
| 139 | };
|
| 140 |
|
| 141 | static struct pernet_operations tipc_topsrv_net_ops = {
|
| 142 | .init = tipc_topsrv_init_net,
|
| 143 | .exit = tipc_topsrv_exit_net,
|
| 144 | };
|
| 145 |
|
| 146 | static int __init tipc_init(void)
|
| 147 | {
|
| 148 | int err;
|
| 149 |
|
| 150 | pr_info("Activated (version " TIPC_MOD_VER ")\n");
|
| 151 |
|
| 152 | sysctl_tipc_rmem[0] = RCVBUF_MIN;
|
| 153 | sysctl_tipc_rmem[1] = RCVBUF_DEF;
|
| 154 | sysctl_tipc_rmem[2] = RCVBUF_MAX;
|
| 155 |
|
| 156 | err = tipc_register_sysctl();
|
| 157 | if (err)
|
| 158 | goto out_sysctl;
|
| 159 |
|
| 160 | err = register_pernet_device(&tipc_net_ops);
|
| 161 | if (err)
|
| 162 | goto out_pernet;
|
| 163 |
|
| 164 | err = tipc_socket_init();
|
| 165 | if (err)
|
| 166 | goto out_socket;
|
| 167 |
|
| 168 | err = register_pernet_device(&tipc_topsrv_net_ops);
|
| 169 | if (err)
|
| 170 | goto out_pernet_topsrv;
|
| 171 |
|
| 172 | err = register_pernet_subsys(&tipc_pernet_pre_exit_ops);
|
| 173 | if (err)
|
| 174 | goto out_register_pernet_subsys;
|
| 175 |
|
| 176 | err = tipc_bearer_setup();
|
| 177 | if (err)
|
| 178 | goto out_bearer;
|
| 179 |
|
| 180 | err = tipc_netlink_start();
|
| 181 | if (err)
|
| 182 | goto out_netlink;
|
| 183 |
|
| 184 | err = tipc_netlink_compat_start();
|
| 185 | if (err)
|
| 186 | goto out_netlink_compat;
|
| 187 |
|
| 188 | pr_info("Started in single node mode\n");
|
| 189 | return 0;
|
| 190 |
|
| 191 | out_netlink_compat:
|
| 192 | tipc_netlink_stop();
|
| 193 | out_netlink:
|
| 194 | tipc_bearer_cleanup();
|
| 195 | out_bearer:
|
| 196 | unregister_pernet_subsys(&tipc_pernet_pre_exit_ops);
|
| 197 | out_register_pernet_subsys:
|
| 198 | unregister_pernet_device(&tipc_topsrv_net_ops);
|
| 199 | out_pernet_topsrv:
|
| 200 | tipc_socket_stop();
|
| 201 | out_socket:
|
| 202 | unregister_pernet_device(&tipc_net_ops);
|
| 203 | out_pernet:
|
| 204 | tipc_unregister_sysctl();
|
| 205 | out_sysctl:
|
| 206 | pr_err("Unable to start in single node mode\n");
|
| 207 | return err;
|
| 208 | }
|
| 209 |
|
| 210 | static void __exit tipc_exit(void)
|
| 211 | {
|
| 212 | tipc_netlink_compat_stop();
|
| 213 | tipc_netlink_stop();
|
| 214 | tipc_bearer_cleanup();
|
| 215 | unregister_pernet_subsys(&tipc_pernet_pre_exit_ops);
|
| 216 | unregister_pernet_device(&tipc_topsrv_net_ops);
|
| 217 | tipc_socket_stop();
|
| 218 | unregister_pernet_device(&tipc_net_ops);
|
| 219 | tipc_unregister_sysctl();
|
| 220 |
|
| 221 | |
| 222 | * calling rcu_barrier().
|
| 223 |
|
| 224 | rcu_barrier();
|
| 225 |
|
| 226 | pr_info("Deactivated\n");
|
| 227 | }
|
| 228 |
|
| 229 | module_init(tipc_init);
|
| 230 | module_exit(tipc_exit);
|
| 231 |
|
| 232 | MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication");
|
| 233 | MODULE_LICENSE("Dual BSD/GPL");
|
| 234 | MODULE_VERSION(TIPC_MOD_VER);
|