Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1 | /* |
| 2 | * net/tipc/core.c: TIPC module code |
| 3 | * |
Per Liden | 9da1c8b | 2006-01-11 18:40:41 +0100 | [diff] [blame] | 4 | * Copyright (c) 2003-2006, Ericsson AB |
Allan Stephens | 4132fac | 2011-01-07 13:12:12 -0500 | [diff] [blame] | 5 | * Copyright (c) 2005-2006, 2010-2011, 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 "ref.h" |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 39 | #include "name_table.h" |
| 40 | #include "subscr.h" |
| 41 | #include "config.h" |
| 42 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 43 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 44 | #ifndef CONFIG_TIPC_PORTS |
| 45 | #define CONFIG_TIPC_PORTS 8191 |
| 46 | #endif |
| 47 | |
| 48 | #ifndef CONFIG_TIPC_LOG |
| 49 | #define CONFIG_TIPC_LOG 0 |
| 50 | #endif |
| 51 | |
| 52 | /* global variables used by multiple sub-systems within TIPC */ |
| 53 | |
| 54 | int tipc_mode = TIPC_NOT_RUNNING; |
| 55 | int tipc_random; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 56 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 57 | const char tipc_alphabet[] = |
Allan Stephens | 3a8d121 | 2006-10-16 21:50:20 -0700 | [diff] [blame] | 58 | "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_."; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 59 | |
| 60 | /* configurable TIPC parameters */ |
| 61 | |
| 62 | u32 tipc_own_addr; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 63 | int tipc_max_ports; |
| 64 | int tipc_max_subscriptions; |
| 65 | int tipc_max_publications; |
| 66 | int tipc_net_id; |
| 67 | int tipc_remote_management; |
| 68 | |
| 69 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 70 | /** |
stephen hemminger | 31e3c3f | 2010-10-13 13:20:35 +0000 | [diff] [blame] | 71 | * tipc_buf_acquire - creates a TIPC message buffer |
Allan Stephens | 3032cca | 2010-05-11 14:30:17 +0000 | [diff] [blame] | 72 | * @size: message size (including TIPC header) |
| 73 | * |
| 74 | * Returns a new buffer with data pointers set to the specified size. |
| 75 | * |
| 76 | * NOTE: Headroom is reserved to allow prepending of a data link header. |
| 77 | * There may also be unrequested tailroom present at the buffer's end. |
| 78 | */ |
| 79 | |
stephen hemminger | 31e3c3f | 2010-10-13 13:20:35 +0000 | [diff] [blame] | 80 | struct sk_buff *tipc_buf_acquire(u32 size) |
Allan Stephens | 3032cca | 2010-05-11 14:30:17 +0000 | [diff] [blame] | 81 | { |
| 82 | struct sk_buff *skb; |
| 83 | unsigned int buf_size = (BUF_HEADROOM + size + 3) & ~3u; |
| 84 | |
| 85 | skb = alloc_skb_fclone(buf_size, GFP_ATOMIC); |
| 86 | if (skb) { |
| 87 | skb_reserve(skb, BUF_HEADROOM); |
| 88 | skb_put(skb, size); |
| 89 | skb->next = NULL; |
| 90 | } |
| 91 | return skb; |
| 92 | } |
| 93 | |
| 94 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 95 | * tipc_core_stop_net - shut down TIPC networking sub-systems |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 96 | */ |
| 97 | |
stephen hemminger | 31e3c3f | 2010-10-13 13:20:35 +0000 | [diff] [blame] | 98 | static void tipc_core_stop_net(void) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 99 | { |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 100 | tipc_eth_media_stop(); |
| 101 | tipc_net_stop(); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 102 | } |
| 103 | |
| 104 | /** |
| 105 | * start_net - start TIPC networking sub-systems |
| 106 | */ |
| 107 | |
Allan Stephens | 0319437 | 2008-05-21 14:55:04 -0700 | [diff] [blame] | 108 | int tipc_core_start_net(unsigned long addr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 109 | { |
| 110 | int res; |
| 111 | |
Allan Stephens | 2db9983 | 2010-12-31 18:59:33 +0000 | [diff] [blame] | 112 | res = tipc_net_start(addr); |
| 113 | if (!res) |
| 114 | res = tipc_eth_media_start(); |
| 115 | if (res) |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 116 | tipc_core_stop_net(); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 117 | return res; |
| 118 | } |
| 119 | |
| 120 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 121 | * tipc_core_stop - switch TIPC from SINGLE NODE to NOT RUNNING mode |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 122 | */ |
| 123 | |
stephen hemminger | 31e3c3f | 2010-10-13 13:20:35 +0000 | [diff] [blame] | 124 | static void tipc_core_stop(void) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 125 | { |
| 126 | if (tipc_mode != TIPC_NODE_MODE) |
| 127 | return; |
| 128 | |
| 129 | tipc_mode = TIPC_NOT_RUNNING; |
| 130 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 131 | tipc_netlink_stop(); |
| 132 | tipc_handler_stop(); |
| 133 | tipc_cfg_stop(); |
| 134 | tipc_subscr_stop(); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 135 | tipc_nametbl_stop(); |
| 136 | tipc_ref_table_stop(); |
| 137 | tipc_socket_stop(); |
Anders Kaseorg | f813809 | 2010-08-17 11:00:03 +0000 | [diff] [blame] | 138 | tipc_log_resize(0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 139 | } |
| 140 | |
| 141 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 142 | * tipc_core_start - switch TIPC from NOT RUNNING to SINGLE NODE mode |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 143 | */ |
| 144 | |
stephen hemminger | 31e3c3f | 2010-10-13 13:20:35 +0000 | [diff] [blame] | 145 | static int tipc_core_start(void) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 146 | { |
| 147 | int res; |
| 148 | |
| 149 | if (tipc_mode != TIPC_NOT_RUNNING) |
| 150 | return -ENOPROTOOPT; |
| 151 | |
| 152 | get_random_bytes(&tipc_random, sizeof(tipc_random)); |
| 153 | tipc_mode = TIPC_NODE_MODE; |
| 154 | |
Allan Stephens | 2db9983 | 2010-12-31 18:59:33 +0000 | [diff] [blame] | 155 | res = tipc_handler_start(); |
| 156 | if (!res) |
| 157 | res = tipc_ref_table_init(tipc_max_ports, tipc_random); |
| 158 | if (!res) |
| 159 | res = tipc_nametbl_init(); |
| 160 | if (!res) |
| 161 | res = tipc_k_signal((Handler)tipc_subscr_start, 0); |
| 162 | if (!res) |
| 163 | res = tipc_k_signal((Handler)tipc_cfg_init, 0); |
| 164 | if (!res) |
| 165 | res = tipc_netlink_start(); |
| 166 | if (!res) |
| 167 | res = tipc_socket_init(); |
| 168 | if (res) |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 169 | tipc_core_stop(); |
Allan Stephens | 2db9983 | 2010-12-31 18:59:33 +0000 | [diff] [blame] | 170 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 171 | return res; |
| 172 | } |
| 173 | |
| 174 | |
| 175 | static int __init tipc_init(void) |
| 176 | { |
| 177 | int res; |
| 178 | |
Anders Kaseorg | f813809 | 2010-08-17 11:00:03 +0000 | [diff] [blame] | 179 | if (tipc_log_resize(CONFIG_TIPC_LOG) != 0) |
| 180 | warn("Unable to create log buffer\n"); |
| 181 | |
Michal Marek | 97fbdc1 | 2011-04-05 16:59:16 +0200 | [diff] [blame] | 182 | info("Activated (version " TIPC_MOD_VER ")\n"); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 183 | |
| 184 | tipc_own_addr = 0; |
| 185 | tipc_remote_management = 1; |
| 186 | tipc_max_publications = 10000; |
| 187 | tipc_max_subscriptions = 2000; |
Amerigo Wang | ee983ac | 2009-12-24 17:26:48 +0000 | [diff] [blame] | 188 | tipc_max_ports = CONFIG_TIPC_PORTS; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 189 | tipc_net_id = 4711; |
| 190 | |
Allan Stephens | 2db9983 | 2010-12-31 18:59:33 +0000 | [diff] [blame] | 191 | res = tipc_core_start(); |
| 192 | if (res) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 193 | err("Unable to start in single node mode\n"); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 194 | else |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 195 | info("Started in single node mode\n"); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 196 | return res; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 197 | } |
| 198 | |
| 199 | static void __exit tipc_exit(void) |
| 200 | { |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 201 | tipc_core_stop_net(); |
| 202 | tipc_core_stop(); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 203 | info("Deactivated\n"); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 204 | } |
| 205 | |
| 206 | module_init(tipc_init); |
| 207 | module_exit(tipc_exit); |
| 208 | |
| 209 | MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication"); |
| 210 | MODULE_LICENSE("Dual BSD/GPL"); |
Allan Stephens | a592ea6 | 2006-06-25 23:42:47 -0700 | [diff] [blame] | 211 | MODULE_VERSION(TIPC_MOD_VER); |