2 * net/tipc/core.c: TIPC module code
4 * Copyright (c) 2003-2006, 2013, Ericsson AB
5 * Copyright (c) 2005-2006, 2010-2013, Wind River Systems
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9 * modification, are permitted provided that the following conditions are met:
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18 * this software without specific prior written permission.
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 sysctl_tipc_rmem
[3] __read_mostly
; /* min/default/max */
56 * tipc_buf_acquire - creates a TIPC message buffer
57 * @size: message size (including TIPC header)
59 * Returns a new buffer with data pointers set to the specified size.
61 * NOTE: Headroom is reserved to allow prepending of a data link header.
62 * There may also be unrequested tailroom present at the buffer's end.
64 struct sk_buff
*tipc_buf_acquire(u32 size
)
67 unsigned int buf_size
= (BUF_HEADROOM
+ size
+ 3) & ~3u;
69 skb
= alloc_skb_fclone(buf_size
, GFP_ATOMIC
);
71 skb_reserve(skb
, BUF_HEADROOM
);
79 * tipc_core_stop - switch TIPC from SINGLE NODE to NOT RUNNING mode
81 static void tipc_core_stop(void)
85 tipc_bearer_cleanup();
89 tipc_ref_table_stop();
91 tipc_unregister_sysctl();
95 * tipc_core_start - switch TIPC from NOT RUNNING to SINGLE NODE mode
97 static int tipc_core_start(void)
101 get_random_bytes(&tipc_random
, sizeof(tipc_random
));
103 err
= tipc_handler_start();
107 err
= tipc_ref_table_init(tipc_max_ports
, tipc_random
);
111 err
= tipc_nametbl_init();
115 err
= tipc_netlink_start();
119 err
= tipc_socket_init();
123 err
= tipc_register_sysctl();
127 err
= tipc_subscr_start();
131 err
= tipc_bearer_setup();
139 tipc_unregister_sysctl();
147 tipc_ref_table_stop();
154 static int __init
tipc_init(void)
158 pr_info("Activated (version " TIPC_MOD_VER
")\n");
161 tipc_max_ports
= CONFIG_TIPC_PORTS
;
164 sysctl_tipc_rmem
[0] = CONN_OVERLOAD_LIMIT
>> 4 << TIPC_LOW_IMPORTANCE
;
165 sysctl_tipc_rmem
[1] = CONN_OVERLOAD_LIMIT
>> 4 <<
166 TIPC_CRITICAL_IMPORTANCE
;
167 sysctl_tipc_rmem
[2] = CONN_OVERLOAD_LIMIT
;
169 res
= tipc_core_start();
171 pr_err("Unable to start in single node mode\n");
173 pr_info("Started in single node mode\n");
177 static void __exit
tipc_exit(void)
180 pr_info("Deactivated\n");
183 module_init(tipc_init
);
184 module_exit(tipc_exit
);
186 MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication");
187 MODULE_LICENSE("Dual BSD/GPL");
188 MODULE_VERSION(TIPC_MOD_VER
);