tcp: mark skbs with SCM_TIMESTAMPING_OPT_STATS
[linux-2.6-microblaze.git] / net / dccp / sysctl.c
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 */
22 static int              zero     = 0,
23                         one      = 1,
24                         u8_max   = 0xFF;
25 static unsigned long    seqw_min = DCCPF_SEQ_WMIN,
26                         seqw_max = 0xFFFFFFFF;          /* maximum on 32 bit */
27
28 static 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
102 static struct ctl_table_header *dccp_table_header;
103
104 int __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
112 void 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 }