1/*
2 *  net/dccp/sysctl.c
3 *
4 *  An implementation of the DCCP protocol
5 *  Arnaldo Carvalho de Melo <acme@mandriva.com>
6 *
7 *	This program is free software; you can redistribute it and/or
8 *	modify it under the terms of the GNU General Public License v2
9 *	as published by the Free Software Foundation.
10 */
11
12#include <linux/mm.h>
13#include <linux/sysctl.h>
14#include "dccp.h"
15#include "feat.h"
16
17#ifndef CONFIG_SYSCTL
18#error This file should not be compiled without CONFIG_SYSCTL defined
19#endif
20
21/* Boundary values */
22static int		zero     = 0,
23			one      = 1,
24			u8_max   = 0xFF;
25static unsigned long	seqw_min = DCCPF_SEQ_WMIN,
26			seqw_max = 0xFFFFFFFF;		/* maximum on 32 bit */
27
28static struct ctl_table dccp_default_table[] = {
29	{
30		.procname	= "seq_window",
31		.data		= &sysctl_dccp_sequence_window,
32		.maxlen		= sizeof(sysctl_dccp_sequence_window),
33		.mode		= 0644,
34		.proc_handler	= proc_doulongvec_minmax,
35		.extra1		= &seqw_min,		/* RFC 4340, 7.5.2 */
36		.extra2		= &seqw_max,
37	},
38	{
39		.procname	= "rx_ccid",
40		.data		= &sysctl_dccp_rx_ccid,
41		.maxlen		= sizeof(sysctl_dccp_rx_ccid),
42		.mode		= 0644,
43		.proc_handler	= proc_dointvec_minmax,
44		.extra1		= &zero,
45		.extra2		= &u8_max,		/* RFC 4340, 10. */
46	},
47	{
48		.procname	= "tx_ccid",
49		.data		= &sysctl_dccp_tx_ccid,
50		.maxlen		= sizeof(sysctl_dccp_tx_ccid),
51		.mode		= 0644,
52		.proc_handler	= proc_dointvec_minmax,
53		.extra1		= &zero,
54		.extra2		= &u8_max,		/* RFC 4340, 10. */
55	},
56	{
57		.procname	= "request_retries",
58		.data		= &sysctl_dccp_request_retries,
59		.maxlen		= sizeof(sysctl_dccp_request_retries),
60		.mode		= 0644,
61		.proc_handler	= proc_dointvec_minmax,
62		.extra1		= &one,
63		.extra2		= &u8_max,
64	},
65	{
66		.procname	= "retries1",
67		.data		= &sysctl_dccp_retries1,
68		.maxlen		= sizeof(sysctl_dccp_retries1),
69		.mode		= 0644,
70		.proc_handler	= proc_dointvec_minmax,
71		.extra1		= &zero,
72		.extra2		= &u8_max,
73	},
74	{
75		.procname	= "retries2",
76		.data		= &sysctl_dccp_retries2,
77		.maxlen		= sizeof(sysctl_dccp_retries2),
78		.mode		= 0644,
79		.proc_handler	= proc_dointvec_minmax,
80		.extra1		= &zero,
81		.extra2		= &u8_max,
82	},
83	{
84		.procname	= "tx_qlen",
85		.data		= &sysctl_dccp_tx_qlen,
86		.maxlen		= sizeof(sysctl_dccp_tx_qlen),
87		.mode		= 0644,
88		.proc_handler	= proc_dointvec_minmax,
89		.extra1		= &zero,
90	},
91	{
92		.procname	= "sync_ratelimit",
93		.data		= &sysctl_dccp_sync_ratelimit,
94		.maxlen		= sizeof(sysctl_dccp_sync_ratelimit),
95		.mode		= 0644,
96		.proc_handler	= proc_dointvec_ms_jiffies,
97	},
98
99	{ }
100};
101
102static struct ctl_table_header *dccp_table_header;
103
104int __init dccp_sysctl_init(void)
105{
106	dccp_table_header = register_net_sysctl(&init_net, "net/dccp/default",
107			dccp_default_table);
108
109	return dccp_table_header != NULL ? 0 : -ENOMEM;
110}
111
112void dccp_sysctl_exit(void)
113{
114	if (dccp_table_header != NULL) {
115		unregister_net_sysctl_table(dccp_table_header);
116		dccp_table_header = NULL;
117	}
118}
119