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 /* rate-limit for syncs in reply to sequence-invalid packets; RFC 4340, 7.5.4 */
  22 int sysctl_dccp_sync_ratelimit  __read_mostly = HZ / 8;
  23
  24 static struct ctl_table dccp_default_table[] = {
  25         {
  26                 .procname       = "seq_window",
  27                 .data           = &sysctl_dccp_feat_sequence_window,
  28                 .maxlen         = sizeof(sysctl_dccp_feat_sequence_window),
  29                 .mode           = 0644,
  30                 .proc_handler   = proc_dointvec,
  31         },
  32         {
  33                 .procname       = "rx_ccid",
  34                 .data           = &sysctl_dccp_feat_rx_ccid,
  35                 .maxlen         = sizeof(sysctl_dccp_feat_rx_ccid),
  36                 .mode           = 0644,
  37                 .proc_handler   = proc_dointvec,
  38         },
  39         {
  40                 .procname       = "tx_ccid",
  41                 .data           = &sysctl_dccp_feat_tx_ccid,
  42                 .maxlen         = sizeof(sysctl_dccp_feat_tx_ccid),
  43                 .mode           = 0644,
  44                 .proc_handler   = proc_dointvec,
  45         },
  46         {
  47                 .procname       = "ack_ratio",
  48                 .data           = &sysctl_dccp_feat_ack_ratio,
  49                 .maxlen         = sizeof(sysctl_dccp_feat_ack_ratio),
  50                 .mode           = 0644,
  51                 .proc_handler   = proc_dointvec,
  52         },
  53         {
  54                 .procname       = "send_ackvec",
  55                 .data           = &sysctl_dccp_feat_send_ack_vector,
  56                 .maxlen         = sizeof(sysctl_dccp_feat_send_ack_vector),
  57                 .mode           = 0644,
  58                 .proc_handler   = proc_dointvec,
  59         },
  60         {
  61                 .procname       = "send_ndp",
  62                 .data           = &sysctl_dccp_feat_send_ndp_count,
  63                 .maxlen         = sizeof(sysctl_dccp_feat_send_ndp_count),
  64                 .mode           = 0644,
  65                 .proc_handler   = proc_dointvec,
  66         },
  67         {
  68                 .procname       = "request_retries",
  69                 .data           = &sysctl_dccp_request_retries,
  70                 .maxlen         = sizeof(sysctl_dccp_request_retries),
  71                 .mode           = 0644,
  72                 .proc_handler   = proc_dointvec,
  73         },
  74         {
  75                 .procname       = "retries1",
  76                 .data           = &sysctl_dccp_retries1,
  77                 .maxlen         = sizeof(sysctl_dccp_retries1),
  78                 .mode           = 0644,
  79                 .proc_handler   = proc_dointvec,
  80         },
  81         {
  82                 .procname       = "retries2",
  83                 .data           = &sysctl_dccp_retries2,
  84                 .maxlen         = sizeof(sysctl_dccp_retries2),
  85                 .mode           = 0644,
  86                 .proc_handler   = proc_dointvec,
  87         },
  88         {
  89                 .procname       = "tx_qlen",
  90                 .data           = &sysctl_dccp_tx_qlen,
  91                 .maxlen         = sizeof(sysctl_dccp_tx_qlen),
  92                 .mode           = 0644,
  93                 .proc_handler   = proc_dointvec,
  94         },
  95         {
  96                 .procname       = "sync_ratelimit",
  97                 .data           = &sysctl_dccp_sync_ratelimit,
  98                 .maxlen         = sizeof(sysctl_dccp_sync_ratelimit),
  99                 .mode           = 0644,
 100                 .proc_handler   = proc_dointvec_ms_jiffies,
 101         },
 102
 103         { .ctl_name = 0, }
 104 };
 105
 106 static struct ctl_table dccp_table[] = {
 107         {
 108                 .ctl_name       = NET_DCCP_DEFAULT,
 109                 .procname       = "default",
 110                 .mode           = 0555,
 111                 .child          = dccp_default_table,
 112         },
 113         { .ctl_name = 0, },
 114 };
 115
 116 static struct ctl_table dccp_dir_table[] = {
 117         {
 118                 .ctl_name       = NET_DCCP,
 119                 .procname       = "dccp",
 120                 .mode           = 0555,
 121                 .child          = dccp_table,
 122         },
 123         { .ctl_name = 0, },
 124 };
 125
 126 static struct ctl_table dccp_root_table[] = {
 127         {
 128                 .ctl_name       = CTL_NET,
 129                 .procname       = "net",
 130                 .mode           = 0555,
 131                 .child          = dccp_dir_table,
 132         },
 133         { .ctl_name = 0, },
 134 };
 135
 136 static struct ctl_table_header *dccp_table_header;
 137
 138 int __init dccp_sysctl_init(void)
 139 {
 140         dccp_table_header = register_sysctl_table(dccp_root_table);
 141
 142         return dccp_table_header != NULL ? 0 : -ENOMEM;
 143 }
 144
 145 void dccp_sysctl_exit(void)
 146 {
 147         if (dccp_table_header != NULL) {
 148                 unregister_sysctl_table(dccp_table_header);
 149                 dccp_table_header = NULL;
 150         }
 151 }