Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1 | /* |
| 2 | * net/tipc/core.c: TIPC module code |
| 3 | * |
Ying Xue | c61dd61 | 2014-02-13 17:29:09 -0500 | [diff] [blame] | 4 | * Copyright (c) 2003-2006, 2013, Ericsson AB |
Ying Xue | 13a2e89 | 2013-06-17 10:54:40 -0400 | [diff] [blame] | 5 | * Copyright (c) 2005-2006, 2010-2013, Wind River Systems |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 6 | * All rights reserved. |
| 7 | * |
Per Liden | 9ea1fd3 | 2006-01-11 13:30:43 +0100 | [diff] [blame] | 8 | * Redistribution and use in source and binary forms, with or without |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 9 | * modification, are permitted provided that the following conditions are met: |
| 10 | * |
Per Liden | 9ea1fd3 | 2006-01-11 13:30:43 +0100 | [diff] [blame] | 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. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 19 | * |
Per Liden | 9ea1fd3 | 2006-01-11 13:30:43 +0100 | [diff] [blame] | 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 |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 34 | * POSSIBILITY OF SUCH DAMAGE. |
| 35 | */ |
| 36 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 37 | #include "core.h" |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 38 | #include "name_table.h" |
| 39 | #include "subscr.h" |
| 40 | #include "config.h" |
Jon Paul Maloy | 2e84c60 | 2014-08-22 18:09:18 -0400 | [diff] [blame] | 41 | #include "socket.h" |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 42 | |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 43 | #include <linux/module.h> |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 44 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 45 | /* global variables used by multiple sub-systems within TIPC */ |
Ying Xue | 61cdd4d | 2012-08-16 12:09:12 +0000 | [diff] [blame] | 46 | int tipc_random __read_mostly; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 47 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 48 | /* configurable TIPC parameters */ |
Ying Xue | 61cdd4d | 2012-08-16 12:09:12 +0000 | [diff] [blame] | 49 | u32 tipc_own_addr __read_mostly; |
| 50 | int tipc_max_ports __read_mostly; |
Ying Xue | 61cdd4d | 2012-08-16 12:09:12 +0000 | [diff] [blame] | 51 | int tipc_net_id __read_mostly; |
Ying Xue | cc79dd1 | 2013-06-17 10:54:37 -0400 | [diff] [blame] | 52 | int sysctl_tipc_rmem[3] __read_mostly; /* min/default/max */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 53 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 54 | /** |
stephen hemminger | 31e3c3f | 2010-10-13 13:20:35 +0000 | [diff] [blame] | 55 | * tipc_buf_acquire - creates a TIPC message buffer |
Allan Stephens | 3032cca | 2010-05-11 14:30:17 +0000 | [diff] [blame] | 56 | * @size: message size (including TIPC header) |
| 57 | * |
| 58 | * Returns a new buffer with data pointers set to the specified size. |
| 59 | * |
| 60 | * NOTE: Headroom is reserved to allow prepending of a data link header. |
| 61 | * There may also be unrequested tailroom present at the buffer's end. |
| 62 | */ |
stephen hemminger | 31e3c3f | 2010-10-13 13:20:35 +0000 | [diff] [blame] | 63 | struct sk_buff *tipc_buf_acquire(u32 size) |
Allan Stephens | 3032cca | 2010-05-11 14:30:17 +0000 | [diff] [blame] | 64 | { |
| 65 | struct sk_buff *skb; |
| 66 | unsigned int buf_size = (BUF_HEADROOM + size + 3) & ~3u; |
| 67 | |
| 68 | skb = alloc_skb_fclone(buf_size, GFP_ATOMIC); |
| 69 | if (skb) { |
| 70 | skb_reserve(skb, BUF_HEADROOM); |
| 71 | skb_put(skb, size); |
| 72 | skb->next = NULL; |
| 73 | } |
| 74 | return skb; |
| 75 | } |
| 76 | |
| 77 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 78 | * tipc_core_stop - switch TIPC from SINGLE NODE to NOT RUNNING mode |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 79 | */ |
stephen hemminger | 31e3c3f | 2010-10-13 13:20:35 +0000 | [diff] [blame] | 80 | static void tipc_core_stop(void) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 81 | { |
Ying Xue | 970122f | 2014-02-20 11:32:50 +0800 | [diff] [blame] | 82 | tipc_net_stop(); |
| 83 | tipc_bearer_cleanup(); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 84 | tipc_netlink_stop(); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 85 | tipc_subscr_stop(); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 86 | tipc_nametbl_stop(); |
Jon Paul Maloy | 808d90f | 2014-08-22 18:09:19 -0400 | [diff] [blame] | 87 | tipc_sk_ref_table_stop(); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 88 | tipc_socket_stop(); |
Ying Xue | cc79dd1 | 2013-06-17 10:54:37 -0400 | [diff] [blame] | 89 | tipc_unregister_sysctl(); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 90 | } |
| 91 | |
| 92 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 93 | * tipc_core_start - switch TIPC from NOT RUNNING to SINGLE NODE mode |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 94 | */ |
stephen hemminger | 31e3c3f | 2010-10-13 13:20:35 +0000 | [diff] [blame] | 95 | static int tipc_core_start(void) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 96 | { |
Ying Xue | 9fe7ed4 | 2014-02-20 11:32:49 +0800 | [diff] [blame] | 97 | int err; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 98 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 99 | get_random_bytes(&tipc_random, sizeof(tipc_random)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 100 | |
Jon Paul Maloy | 808d90f | 2014-08-22 18:09:19 -0400 | [diff] [blame] | 101 | err = tipc_sk_ref_table_init(tipc_max_ports, tipc_random); |
Ying Xue | 9fe7ed4 | 2014-02-20 11:32:49 +0800 | [diff] [blame] | 102 | if (err) |
| 103 | goto out_reftbl; |
| 104 | |
| 105 | err = tipc_nametbl_init(); |
| 106 | if (err) |
| 107 | goto out_nametbl; |
| 108 | |
| 109 | err = tipc_netlink_start(); |
| 110 | if (err) |
| 111 | goto out_netlink; |
| 112 | |
| 113 | err = tipc_socket_init(); |
| 114 | if (err) |
| 115 | goto out_socket; |
| 116 | |
| 117 | err = tipc_register_sysctl(); |
| 118 | if (err) |
| 119 | goto out_sysctl; |
| 120 | |
| 121 | err = tipc_subscr_start(); |
| 122 | if (err) |
| 123 | goto out_subscr; |
| 124 | |
Ying Xue | 970122f | 2014-02-20 11:32:50 +0800 | [diff] [blame] | 125 | err = tipc_bearer_setup(); |
| 126 | if (err) |
| 127 | goto out_bearer; |
| 128 | |
Ying Xue | 9fe7ed4 | 2014-02-20 11:32:49 +0800 | [diff] [blame] | 129 | return 0; |
Ying Xue | 970122f | 2014-02-20 11:32:50 +0800 | [diff] [blame] | 130 | out_bearer: |
Ying Xue | 9fe7ed4 | 2014-02-20 11:32:49 +0800 | [diff] [blame] | 131 | tipc_subscr_stop(); |
| 132 | out_subscr: |
| 133 | tipc_unregister_sysctl(); |
| 134 | out_sysctl: |
| 135 | tipc_socket_stop(); |
| 136 | out_socket: |
| 137 | tipc_netlink_stop(); |
| 138 | out_netlink: |
| 139 | tipc_nametbl_stop(); |
| 140 | out_nametbl: |
Jon Paul Maloy | 808d90f | 2014-08-22 18:09:19 -0400 | [diff] [blame] | 141 | tipc_sk_ref_table_stop(); |
Ying Xue | 9fe7ed4 | 2014-02-20 11:32:49 +0800 | [diff] [blame] | 142 | out_reftbl: |
Ying Xue | 9fe7ed4 | 2014-02-20 11:32:49 +0800 | [diff] [blame] | 143 | return err; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 144 | } |
| 145 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 146 | static int __init tipc_init(void) |
| 147 | { |
| 148 | int res; |
| 149 | |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 150 | pr_info("Activated (version " TIPC_MOD_VER ")\n"); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 151 | |
| 152 | tipc_own_addr = 0; |
Amerigo Wang | ee983ac | 2009-12-24 17:26:48 +0000 | [diff] [blame] | 153 | tipc_max_ports = CONFIG_TIPC_PORTS; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 154 | tipc_net_id = 4711; |
| 155 | |
Jon Paul Maloy | 6163a19 | 2014-05-14 05:39:08 -0400 | [diff] [blame] | 156 | sysctl_tipc_rmem[0] = TIPC_CONN_OVERLOAD_LIMIT >> 4 << |
| 157 | TIPC_LOW_IMPORTANCE; |
| 158 | sysctl_tipc_rmem[1] = TIPC_CONN_OVERLOAD_LIMIT >> 4 << |
Ying Xue | cc79dd1 | 2013-06-17 10:54:37 -0400 | [diff] [blame] | 159 | TIPC_CRITICAL_IMPORTANCE; |
Jon Paul Maloy | 6163a19 | 2014-05-14 05:39:08 -0400 | [diff] [blame] | 160 | sysctl_tipc_rmem[2] = TIPC_CONN_OVERLOAD_LIMIT; |
Ying Xue | cc79dd1 | 2013-06-17 10:54:37 -0400 | [diff] [blame] | 161 | |
Allan Stephens | 2db9983 | 2010-12-31 18:59:33 +0000 | [diff] [blame] | 162 | res = tipc_core_start(); |
| 163 | if (res) |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 164 | pr_err("Unable to start in single node mode\n"); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 165 | else |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 166 | pr_info("Started in single node mode\n"); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 167 | return res; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 168 | } |
| 169 | |
| 170 | static void __exit tipc_exit(void) |
| 171 | { |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 172 | tipc_core_stop(); |
Erik Hugne | 2cf8aa1 | 2012-06-29 00:16:37 -0400 | [diff] [blame] | 173 | pr_info("Deactivated\n"); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 174 | } |
| 175 | |
| 176 | module_init(tipc_init); |
| 177 | module_exit(tipc_exit); |
| 178 | |
| 179 | MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication"); |
| 180 | MODULE_LICENSE("Dual BSD/GPL"); |
Allan Stephens | a592ea6 | 2006-06-25 23:42:47 -0700 | [diff] [blame] | 181 | MODULE_VERSION(TIPC_MOD_VER); |