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                        u8_max   = 0xFF;
  24static unsigned long    seqw_min = DCCPF_SEQ_WMIN,
  25                        seqw_max = 0xFFFFFFFF;          /* maximum on 32 bit */
  26
  27static struct ctl_table dccp_default_table[] = {
  28        {
  29                .procname       = "seq_window",
  30                .data           = &sysctl_dccp_sequence_window,
  31                .maxlen         = sizeof(sysctl_dccp_sequence_window),
  32                .mode           = 0644,
  33                .proc_handler   = proc_doulongvec_minmax,
  34                .extra1         = &seqw_min,            /* RFC 4340, 7.5.2 */
  35                .extra2         = &seqw_max,
  36        },
  37        {
  38                .procname       = "rx_ccid",
  39                .data           = &sysctl_dccp_rx_ccid,
  40                .maxlen         = sizeof(sysctl_dccp_rx_ccid),
  41                .mode           = 0644,
  42                .proc_handler   = proc_dointvec_minmax,
  43                .extra1         = &zero,
  44                .extra2         = &u8_max,              /* RFC 4340, 10. */
  45        },
  46        {
  47                .procname       = "tx_ccid",
  48                .data           = &sysctl_dccp_tx_ccid,
  49                .maxlen         = sizeof(sysctl_dccp_tx_ccid),
  50                .mode           = 0644,
  51                .proc_handler   = proc_dointvec_minmax,
  52                .extra1         = &zero,
  53                .extra2         = &u8_max,              /* RFC 4340, 10. */
  54        },
  55        {
  56                .procname       = "request_retries",
  57                .data           = &sysctl_dccp_request_retries,
  58                .maxlen         = sizeof(sysctl_dccp_request_retries),
  59                .mode           = 0644,
  60                .proc_handler   = proc_dointvec_minmax,
  61                .extra1         = &zero,
  62                .extra2         = &u8_max,
  63        },
  64        {
  65                .procname       = "retries1",
  66                .data           = &sysctl_dccp_retries1,
  67                .maxlen         = sizeof(sysctl_dccp_retries1),
  68                .mode           = 0644,
  69                .proc_handler   = proc_dointvec_minmax,
  70                .extra1         = &zero,
  71                .extra2         = &u8_max,
  72        },
  73        {
  74                .procname       = "retries2",
  75                .data           = &sysctl_dccp_retries2,
  76                .maxlen         = sizeof(sysctl_dccp_retries2),
  77                .mode           = 0644,
  78                .proc_handler   = proc_dointvec_minmax,
  79                .extra1         = &zero,
  80                .extra2         = &u8_max,
  81        },
  82        {
  83                .procname       = "tx_qlen",
  84                .data           = &sysctl_dccp_tx_qlen,
  85                .maxlen         = sizeof(sysctl_dccp_tx_qlen),
  86                .mode           = 0644,
  87                .proc_handler   = proc_dointvec_minmax,
  88                .extra1         = &zero,
  89        },
  90        {
  91                .procname       = "sync_ratelimit",
  92                .data           = &sysctl_dccp_sync_ratelimit,
  93                .maxlen         = sizeof(sysctl_dccp_sync_ratelimit),
  94                .mode           = 0644,
  95                .proc_handler   = proc_dointvec_ms_jiffies,
  96        },
  97
  98        { }
  99};
 100
 101static struct ctl_path dccp_path[] = {
 102        { .procname = "net", },
 103        { .procname = "dccp", },
 104        { .procname = "default", },
 105        { }
 106};
 107
 108static struct ctl_table_header *dccp_table_header;
 109
 110int __init dccp_sysctl_init(void)
 111{
 112        dccp_table_header = register_sysctl_paths(dccp_path,
 113                        dccp_default_table);
 114
 115        return dccp_table_header != NULL ? 0 : -ENOMEM;
 116}
 117
 118void dccp_sysctl_exit(void)
 119{
 120        if (dccp_table_header != NULL) {
 121                unregister_sysctl_table(dccp_table_header);
 122                dccp_table_header = NULL;
 123        }
 124}
 125