linux/net/dccp/sysctl.c
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   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                        u8_max   = 0xFF;
  24static unsigned long    seqw_min = 32;
  25
  26static struct ctl_table dccp_default_table[] = {
  27        {
  28                .procname       = "seq_window",
  29                .data           = &sysctl_dccp_sequence_window,
  30                .maxlen         = sizeof(sysctl_dccp_sequence_window),
  31                .mode           = 0644,
  32                .proc_handler   = proc_doulongvec_minmax,
  33                .extra1         = &seqw_min,            /* RFC 4340, 7.5.2 */
  34        },
  35        {
  36                .procname       = "rx_ccid",
  37                .data           = &sysctl_dccp_rx_ccid,
  38                .maxlen         = sizeof(sysctl_dccp_rx_ccid),
  39                .mode           = 0644,
  40                .proc_handler   = proc_dointvec_minmax,
  41                .extra1         = &zero,
  42                .extra2         = &u8_max,              /* RFC 4340, 10. */
  43        },
  44        {
  45                .procname       = "tx_ccid",
  46                .data           = &sysctl_dccp_tx_ccid,
  47                .maxlen         = sizeof(sysctl_dccp_tx_ccid),
  48                .mode           = 0644,
  49                .proc_handler   = proc_dointvec_minmax,
  50                .extra1         = &zero,
  51                .extra2         = &u8_max,              /* RFC 4340, 10. */
  52        },
  53        {
  54                .procname       = "request_retries",
  55                .data           = &sysctl_dccp_request_retries,
  56                .maxlen         = sizeof(sysctl_dccp_request_retries),
  57                .mode           = 0644,
  58                .proc_handler   = proc_dointvec_minmax,
  59                .extra1         = &zero,
  60                .extra2         = &u8_max,
  61        },
  62        {
  63                .procname       = "retries1",
  64                .data           = &sysctl_dccp_retries1,
  65                .maxlen         = sizeof(sysctl_dccp_retries1),
  66                .mode           = 0644,
  67                .proc_handler   = proc_dointvec_minmax,
  68                .extra1         = &zero,
  69                .extra2         = &u8_max,
  70        },
  71        {
  72                .procname       = "retries2",
  73                .data           = &sysctl_dccp_retries2,
  74                .maxlen         = sizeof(sysctl_dccp_retries2),
  75                .mode           = 0644,
  76                .proc_handler   = proc_dointvec_minmax,
  77                .extra1         = &zero,
  78                .extra2         = &u8_max,
  79        },
  80        {
  81                .procname       = "tx_qlen",
  82                .data           = &sysctl_dccp_tx_qlen,
  83                .maxlen         = sizeof(sysctl_dccp_tx_qlen),
  84                .mode           = 0644,
  85                .proc_handler   = proc_dointvec_minmax,
  86                .extra1         = &zero,
  87        },
  88        {
  89                .procname       = "sync_ratelimit",
  90                .data           = &sysctl_dccp_sync_ratelimit,
  91                .maxlen         = sizeof(sysctl_dccp_sync_ratelimit),
  92                .mode           = 0644,
  93                .proc_handler   = proc_dointvec_ms_jiffies,
  94        },
  95
  96        { .ctl_name = 0, }
  97};
  98
  99static struct ctl_path dccp_path[] = {
 100        { .procname = "net", .ctl_name = CTL_NET, },
 101        { .procname = "dccp", .ctl_name = NET_DCCP, },
 102        { .procname = "default", .ctl_name = NET_DCCP_DEFAULT, },
 103        { }
 104};
 105
 106static struct ctl_table_header *dccp_table_header;
 107
 108int __init dccp_sysctl_init(void)
 109{
 110        dccp_table_header = register_sysctl_paths(dccp_path,
 111                        dccp_default_table);
 112
 113        return dccp_table_header != NULL ? 0 : -ENOMEM;
 114}
 115
 116void dccp_sysctl_exit(void)
 117{
 118        if (dccp_table_header != NULL) {
 119                unregister_sysctl_table(dccp_table_header);
 120                dccp_table_header = NULL;
 121        }
 122}
 123