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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17 * contributors may be used to endorse or promote products derived from
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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37 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
40 #include "name_table.h"
45 #include <linux/module.h>
47 /* global variables used by multiple sub-systems within TIPC */
48 int tipc_random __read_mostly;
50 /* configurable TIPC parameters */
51 u32 tipc_own_addr __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);
78 static int __init tipc_init(void)
82 pr_info("Activated (version " TIPC_MOD_VER ")\n");
87 sysctl_tipc_rmem[0] = TIPC_CONN_OVERLOAD_LIMIT >> 4 <<
89 sysctl_tipc_rmem[1] = TIPC_CONN_OVERLOAD_LIMIT >> 4 <<
90 TIPC_CRITICAL_IMPORTANCE;
91 sysctl_tipc_rmem[2] = TIPC_CONN_OVERLOAD_LIMIT;
93 get_random_bytes(&tipc_random, sizeof(tipc_random));
95 err = tipc_sk_rht_init();
99 err = tipc_nametbl_init();
103 err = tipc_netlink_start();
107 err = tipc_socket_init();
111 err = tipc_register_sysctl();
115 err = tipc_subscr_start();
119 err = tipc_bearer_setup();
123 pr_info("Started in single node mode\n");
128 tipc_unregister_sysctl();
136 tipc_sk_rht_destroy();
138 pr_err("Unable to start in single node mode\n");
142 static void __exit tipc_exit(void)
145 tipc_bearer_cleanup();
150 tipc_unregister_sysctl();
151 tipc_sk_rht_destroy();
153 pr_info("Deactivated\n");
156 module_init(tipc_init);
157 module_exit(tipc_exit);
159 MODULE_DESCRIPTION("TIPC: Transparent Inter Process Communication");
160 MODULE_LICENSE("Dual BSD/GPL");
161 MODULE_VERSION(TIPC_MOD_VER);