2 * net/tipc/core.c: TIPC module code
4 * Copyright (c) 2003-2006, Ericsson AB
5 * Copyright (c) 2005-2006, Wind River Systems
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21 * GNU General Public License ("GPL") version 2 as published by the Free
22 * Software Foundation.
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39 #include "name_table.h"
44 #ifndef CONFIG_TIPC_NODES
45 #define CONFIG_TIPC_NODES 255
48 #ifndef CONFIG_TIPC_PORTS
49 #define CONFIG_TIPC_PORTS 8191
52 #ifndef CONFIG_TIPC_LOG
53 #define CONFIG_TIPC_LOG 0
56 /* global variables used by multiple sub-systems within TIPC */
58 int tipc_mode = TIPC_NOT_RUNNING;
60 atomic_t tipc_user_count = ATOMIC_INIT(0);
62 const char tipc_alphabet[] =
63 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_.";
65 /* configurable TIPC parameters */
70 int tipc_max_subscriptions;
71 int tipc_max_publications;
73 int tipc_remote_management;
77 * tipc_buf_acquire - creates a TIPC message buffer
78 * @size: message size (including TIPC header)
80 * Returns a new buffer with data pointers set to the specified size.
82 * NOTE: Headroom is reserved to allow prepending of a data link header.
83 * There may also be unrequested tailroom present at the buffer's end.
86 struct sk_buff *tipc_buf_acquire(u32 size)
89 unsigned int buf_size = (BUF_HEADROOM + size + 3) & ~3u;
91 skb = alloc_skb_fclone(buf_size, GFP_ATOMIC);
93 skb_reserve(skb, BUF_HEADROOM);
101 * tipc_core_stop_net - shut down TIPC networking sub-systems
104 static void tipc_core_stop_net(void)
106 tipc_eth_media_stop();
111 * start_net - start TIPC networking sub-systems
114 int tipc_core_start_net(unsigned long addr)
118 res = tipc_net_start(addr);
120 res = tipc_eth_media_start();
122 tipc_core_stop_net();
127 * tipc_core_stop - switch TIPC from SINGLE NODE to NOT RUNNING mode
130 static void tipc_core_stop(void)
132 if (tipc_mode != TIPC_NODE_MODE)
135 tipc_mode = TIPC_NOT_RUNNING;
142 tipc_ref_table_stop();
148 * tipc_core_start - switch TIPC from NOT RUNNING to SINGLE NODE mode
151 static int tipc_core_start(void)
155 if (tipc_mode != TIPC_NOT_RUNNING)
158 get_random_bytes(&tipc_random, sizeof(tipc_random));
159 tipc_mode = TIPC_NODE_MODE;
161 res = tipc_handler_start();
163 res = tipc_ref_table_init(tipc_max_ports, tipc_random);
165 res = tipc_nametbl_init();
167 res = tipc_k_signal((Handler)tipc_subscr_start, 0);
169 res = tipc_k_signal((Handler)tipc_cfg_init, 0);
171 res = tipc_netlink_start();
173 res = tipc_socket_init();
181 static int __init tipc_init(void)
185 if (tipc_log_resize(CONFIG_TIPC_LOG) != 0)
186 warn("Unable to create log buffer\n");
188 info("Activated (version " TIPC_MOD_VER
189 " compiled " __DATE__ " " __TIME__ ")\n");
192 tipc_remote_management = 1;
193 tipc_max_publications = 10000;
194 tipc_max_subscriptions = 2000;
195 tipc_max_ports = CONFIG_TIPC_PORTS;
196 tipc_max_nodes = CONFIG_TIPC_NODES;
199 res = tipc_core_start();
201 err("Unable to start in single node mode\n");
203 info("Started in single node mode\n");
207 static void __exit tipc_exit(void)
209 tipc_core_stop_net();
211 info("Deactivated\n");
214 module_init(tipc_init);
215 module_exit(tipc_exit);
217 MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication");
218 MODULE_LICENSE("Dual BSD/GPL");
219 MODULE_VERSION(TIPC_MOD_VER);