1 /*
2  * net/tipc/sysctl.c: sysctl interface to TIPC subsystem
3  *
4  * Copyright (c) 2013, Wind River Systems
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions are met:
9  *
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  * 3. Neither the names of the copyright holders nor the names of its
16  *    contributors may be used to endorse or promote products derived from
17  *    this software without specific prior written permission.
18  *
19  * Alternatively, this software may be distributed under the terms of the
20  * GNU General Public License ("GPL") version 2 as published by the Free
21  * Software Foundation.
22  *
23  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
24  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
27  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
30  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
31  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
32  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
33  * POSSIBILITY OF SUCH DAMAGE.
34  */
35 
36 #include "core.h"
37 #include "trace.h"
38 #include "crypto.h"
39 #include "bcast.h"
40 #include <linux/sysctl.h>
41 
42 static struct ctl_table_header *tipc_ctl_hdr;
43 
44 static struct ctl_table tipc_table[] = {
45 	{
46 		.procname	= "tipc_rmem",
47 		.data		= &sysctl_tipc_rmem,
48 		.maxlen		= sizeof(sysctl_tipc_rmem),
49 		.mode		= 0644,
50 		.proc_handler	= proc_dointvec_minmax,
51 		.extra1         = SYSCTL_ONE,
52 	},
53 	{
54 		.procname	= "named_timeout",
55 		.data		= &sysctl_tipc_named_timeout,
56 		.maxlen		= sizeof(sysctl_tipc_named_timeout),
57 		.mode		= 0644,
58 		.proc_handler	= proc_dointvec_minmax,
59 		.extra1         = SYSCTL_ZERO,
60 	},
61 	{
62 		.procname       = "sk_filter",
63 		.data           = &sysctl_tipc_sk_filter,
64 		.maxlen         = sizeof(sysctl_tipc_sk_filter),
65 		.mode           = 0644,
66 		.proc_handler   = proc_doulongvec_minmax,
67 	},
68 #ifdef CONFIG_TIPC_CRYPTO
69 	{
70 		.procname	= "max_tfms",
71 		.data		= &sysctl_tipc_max_tfms,
72 		.maxlen		= sizeof(sysctl_tipc_max_tfms),
73 		.mode		= 0644,
74 		.proc_handler	= proc_dointvec_minmax,
75 		.extra1         = SYSCTL_ONE,
76 	},
77 	{
78 		.procname	= "key_exchange_enabled",
79 		.data		= &sysctl_tipc_key_exchange_enabled,
80 		.maxlen		= sizeof(sysctl_tipc_key_exchange_enabled),
81 		.mode		= 0644,
82 		.proc_handler	= proc_dointvec_minmax,
83 		.extra1         = SYSCTL_ZERO,
84 		.extra2         = SYSCTL_ONE,
85 	},
86 #endif
87 	{
88 		.procname	= "bc_retruni",
89 		.data		= &sysctl_tipc_bc_retruni,
90 		.maxlen		= sizeof(sysctl_tipc_bc_retruni),
91 		.mode		= 0644,
92 		.proc_handler	= proc_doulongvec_minmax,
93 	},
94 	{}
95 };
96 
tipc_register_sysctl(void)97 int tipc_register_sysctl(void)
98 {
99 	tipc_ctl_hdr = register_net_sysctl(&init_net, "net/tipc", tipc_table);
100 	if (tipc_ctl_hdr == NULL)
101 		return -ENOMEM;
102 	return 0;
103 }
104 
tipc_unregister_sysctl(void)105 void tipc_unregister_sysctl(void)
106 {
107 	unregister_net_sysctl_table(tipc_ctl_hdr);
108 }
109