2 * net/tipc/core.c: TIPC module code
4 * Copyright (c) 2003-2006, Ericsson AB
5 * Copyright (c) 2005-2006, 2010-2013, Wind River Systems
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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.
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39 #include "name_table.h"
44 #include <linux/module.h>
46 /* global variables used by multiple sub-systems within TIPC */
47 int tipc_random __read_mostly;
49 /* configurable TIPC parameters */
50 u32 tipc_own_addr __read_mostly;
51 int tipc_max_ports __read_mostly;
52 int tipc_net_id __read_mostly;
53 int tipc_remote_management __read_mostly;
54 int sysctl_tipc_rmem[3] __read_mostly; /* min/default/max */
57 * tipc_buf_acquire - creates a TIPC message buffer
58 * @size: message size (including TIPC header)
60 * Returns a new buffer with data pointers set to the specified size.
62 * NOTE: Headroom is reserved to allow prepending of a data link header.
63 * There may also be unrequested tailroom present at the buffer's end.
65 struct sk_buff *tipc_buf_acquire(u32 size)
68 unsigned int buf_size = (BUF_HEADROOM + size + 3) & ~3u;
70 skb = alloc_skb_fclone(buf_size, GFP_ATOMIC);
72 skb_reserve(skb, BUF_HEADROOM);
80 * tipc_core_stop_net - shut down TIPC networking sub-systems
82 static void tipc_core_stop_net(void)
85 tipc_eth_media_stop();
90 * start_net - start TIPC networking sub-systems
92 int tipc_core_start_net(unsigned long addr)
97 res = tipc_eth_media_start();
100 res = tipc_ib_media_start();
106 tipc_core_stop_net();
111 * tipc_core_stop - switch TIPC from SINGLE NODE to NOT RUNNING mode
113 static void tipc_core_stop(void)
119 tipc_ref_table_stop();
121 tipc_unregister_sysctl();
125 * tipc_core_start - switch TIPC from NOT RUNNING to SINGLE NODE mode
127 static int tipc_core_start(void)
131 get_random_bytes(&tipc_random, sizeof(tipc_random));
133 res = tipc_handler_start();
135 res = tipc_ref_table_init(tipc_max_ports, tipc_random);
137 res = tipc_nametbl_init();
139 res = tipc_netlink_start();
141 res = tipc_socket_init();
143 res = tipc_register_sysctl();
145 res = tipc_subscr_start();
147 res = tipc_cfg_init();
155 static int __init tipc_init(void)
159 pr_info("Activated (version " TIPC_MOD_VER ")\n");
162 tipc_remote_management = 1;
163 tipc_max_ports = CONFIG_TIPC_PORTS;
166 sysctl_tipc_rmem[0] = CONN_OVERLOAD_LIMIT >> 4 << TIPC_LOW_IMPORTANCE;
167 sysctl_tipc_rmem[1] = CONN_OVERLOAD_LIMIT >> 4 <<
168 TIPC_CRITICAL_IMPORTANCE;
169 sysctl_tipc_rmem[2] = CONN_OVERLOAD_LIMIT;
171 res = tipc_core_start();
173 pr_err("Unable to start in single node mode\n");
175 pr_info("Started in single node mode\n");
179 static void __exit tipc_exit(void)
182 tipc_core_stop_net();
184 pr_info("Deactivated\n");
187 module_init(tipc_init);
188 module_exit(tipc_exit);
190 MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication");
191 MODULE_LICENSE("Dual BSD/GPL");
192 MODULE_VERSION(TIPC_MOD_VER);