| 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); |