| /* |
| * net/tipc/core.c: TIPC module code |
| * |
| * Copyright (c) 2003-2006, Ericsson AB |
| * Copyright (c) 2005-2006, Wind River Systems |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. Neither the names of the copyright holders nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * Alternatively, this software may be distributed under the terms of the |
| * GNU General Public License ("GPL") version 2 as published by the Free |
| * Software Foundation. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| * POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include <linux/init.h> |
| #include <linux/module.h> |
| #include <linux/kernel.h> |
| #include <linux/random.h> |
| |
| #include "core.h" |
| #include "ref.h" |
| #include "net.h" |
| #include "user_reg.h" |
| #include "name_table.h" |
| #include "subscr.h" |
| #include "config.h" |
| |
| |
| #ifndef CONFIG_TIPC_ZONES |
| #define CONFIG_TIPC_ZONES 3 |
| #endif |
| |
| #ifndef CONFIG_TIPC_CLUSTERS |
| #define CONFIG_TIPC_CLUSTERS 1 |
| #endif |
| |
| #ifndef CONFIG_TIPC_NODES |
| #define CONFIG_TIPC_NODES 255 |
| #endif |
| |
| #ifndef CONFIG_TIPC_SLAVE_NODES |
| #define CONFIG_TIPC_SLAVE_NODES 0 |
| #endif |
| |
| #ifndef CONFIG_TIPC_PORTS |
| #define CONFIG_TIPC_PORTS 8191 |
| #endif |
| |
| #ifndef CONFIG_TIPC_LOG |
| #define CONFIG_TIPC_LOG 0 |
| #endif |
| |
| /* global variables used by multiple sub-systems within TIPC */ |
| |
| int tipc_mode = TIPC_NOT_RUNNING; |
| int tipc_random; |
| atomic_t tipc_user_count = ATOMIC_INIT(0); |
| |
| const char tipc_alphabet[] = |
| "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_."; |
| |
| /* configurable TIPC parameters */ |
| |
| u32 tipc_own_addr; |
| int tipc_max_zones; |
| int tipc_max_clusters; |
| int tipc_max_nodes; |
| int tipc_max_slaves; |
| int tipc_max_ports; |
| int tipc_max_subscriptions; |
| int tipc_max_publications; |
| int tipc_net_id; |
| int tipc_remote_management; |
| |
| |
| /** |
| * tipc_buf_acquire - creates a TIPC message buffer |
| * @size: message size (including TIPC header) |
| * |
| * Returns a new buffer with data pointers set to the specified size. |
| * |
| * NOTE: Headroom is reserved to allow prepending of a data link header. |
| * There may also be unrequested tailroom present at the buffer's end. |
| */ |
| |
| struct sk_buff *tipc_buf_acquire(u32 size) |
| { |
| struct sk_buff *skb; |
| unsigned int buf_size = (BUF_HEADROOM + size + 3) & ~3u; |
| |
| skb = alloc_skb_fclone(buf_size, GFP_ATOMIC); |
| if (skb) { |
| skb_reserve(skb, BUF_HEADROOM); |
| skb_put(skb, size); |
| skb->next = NULL; |
| } |
| return skb; |
| } |
| |
| /** |
| * tipc_core_stop_net - shut down TIPC networking sub-systems |
| */ |
| |
| static void tipc_core_stop_net(void) |
| { |
| tipc_eth_media_stop(); |
| tipc_net_stop(); |
| } |
| |
| /** |
| * start_net - start TIPC networking sub-systems |
| */ |
| |
| int tipc_core_start_net(unsigned long addr) |
| { |
| int res; |
| |
| if ((res = tipc_net_start(addr)) || |
| (res = tipc_eth_media_start())) { |
| tipc_core_stop_net(); |
| } |
| return res; |
| } |
| |
| /** |
| * tipc_core_stop - switch TIPC from SINGLE NODE to NOT RUNNING mode |
| */ |
| |
| static void tipc_core_stop(void) |
| { |
| if (tipc_mode != TIPC_NODE_MODE) |
| return; |
| |
| tipc_mode = TIPC_NOT_RUNNING; |
| |
| tipc_netlink_stop(); |
| tipc_handler_stop(); |
| tipc_cfg_stop(); |
| tipc_subscr_stop(); |
| tipc_reg_stop(); |
| tipc_nametbl_stop(); |
| tipc_ref_table_stop(); |
| tipc_socket_stop(); |
| tipc_log_resize(0); |
| } |
| |
| /** |
| * tipc_core_start - switch TIPC from NOT RUNNING to SINGLE NODE mode |
| */ |
| |
| static int tipc_core_start(void) |
| { |
| int res; |
| |
| if (tipc_mode != TIPC_NOT_RUNNING) |
| return -ENOPROTOOPT; |
| |
| get_random_bytes(&tipc_random, sizeof(tipc_random)); |
| tipc_mode = TIPC_NODE_MODE; |
| |
| if ((res = tipc_handler_start()) || |
| (res = tipc_ref_table_init(tipc_max_ports, tipc_random)) || |
| (res = tipc_reg_start()) || |
| (res = tipc_nametbl_init()) || |
| (res = tipc_k_signal((Handler)tipc_subscr_start, 0)) || |
| (res = tipc_k_signal((Handler)tipc_cfg_init, 0)) || |
| (res = tipc_netlink_start()) || |
| (res = tipc_socket_init())) { |
| tipc_core_stop(); |
| } |
| return res; |
| } |
| |
| |
| static int __init tipc_init(void) |
| { |
| int res; |
| |
| if (tipc_log_resize(CONFIG_TIPC_LOG) != 0) |
| warn("Unable to create log buffer\n"); |
| |
| info("Activated (version " TIPC_MOD_VER |
| " compiled " __DATE__ " " __TIME__ ")\n"); |
| |
| tipc_own_addr = 0; |
| tipc_remote_management = 1; |
| tipc_max_publications = 10000; |
| tipc_max_subscriptions = 2000; |
| tipc_max_ports = CONFIG_TIPC_PORTS; |
| tipc_max_zones = CONFIG_TIPC_ZONES; |
| tipc_max_clusters = CONFIG_TIPC_CLUSTERS; |
| tipc_max_nodes = CONFIG_TIPC_NODES; |
| tipc_max_slaves = CONFIG_TIPC_SLAVE_NODES; |
| tipc_net_id = 4711; |
| |
| if ((res = tipc_core_start())) |
| err("Unable to start in single node mode\n"); |
| else |
| info("Started in single node mode\n"); |
| return res; |
| } |
| |
| static void __exit tipc_exit(void) |
| { |
| tipc_core_stop_net(); |
| tipc_core_stop(); |
| info("Deactivated\n"); |
| } |
| |
| module_init(tipc_init); |
| module_exit(tipc_exit); |
| |
| MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication"); |
| MODULE_LICENSE("Dual BSD/GPL"); |
| MODULE_VERSION(TIPC_MOD_VER); |