LXR linux/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 */
  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