net/rxrpc/sysctl.c

   1 /* sysctls for configuring RxRPC operating parameters
   2  *
   3  * Copyright (C) 2014 Red Hat, Inc. All Rights Reserved.
   4  * Written by David Howells (dhowells@redhat.com)
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public Licence
   8  * as published by the Free Software Foundation; either version
   9  * 2 of the Licence, or (at your option) any later version.
  10  */
  11
  12 #include <linux/sysctl.h>
  13 #include <net/sock.h>
  14 #include <net/af_rxrpc.h>
  15 #include "ar-internal.h"
  16
  17 static struct ctl_table_header *rxrpc_sysctl_reg_table;
  18 static const unsigned zero = 0;
  19 static const unsigned one = 1;
  20
  21 /*
  22  * RxRPC operating parameters.
  23  *
  24  * See Documentation/networking/rxrpc.txt and the variable definitions for more
  25  * information on the individual parameters.
  26  */
  27 static struct ctl_table rxrpc_sysctl_table[] = {
  28         /* Values measured in milliseconds */
  29         {
  30                 .procname       = "req_ack_delay",
  31                 .data           = &rxrpc_requested_ack_delay,
  32                 .maxlen         = sizeof(unsigned),
  33                 .mode           = 0644,
  34                 .proc_handler   = proc_dointvec_ms_jiffies,
  35                 .extra1         = (void *)&zero,
  36         },
  37         {
  38                 .procname       = "soft_ack_delay",
  39                 .data           = &rxrpc_soft_ack_delay,
  40                 .maxlen         = sizeof(unsigned),
  41                 .mode           = 0644,
  42                 .proc_handler   = proc_dointvec_ms_jiffies,
  43                 .extra1         = (void *)&one,
  44         },
  45         {
  46                 .procname       = "idle_ack_delay",
  47                 .data           = &rxrpc_idle_ack_delay,
  48                 .maxlen         = sizeof(unsigned),
  49                 .mode           = 0644,
  50                 .proc_handler   = proc_dointvec_ms_jiffies,
  51                 .extra1         = (void *)&one,
  52         },
  53         {
  54                 .procname       = "resend_timeout",
  55                 .data           = &rxrpc_resend_timeout,
  56                 .maxlen         = sizeof(unsigned),
  57                 .mode           = 0644,
  58                 .proc_handler   = proc_dointvec_ms_jiffies,
  59                 .extra1         = (void *)&one,
  60         },
  61
  62         /* Values measured in seconds but used in jiffies */
  63         {
  64                 .procname       = "max_call_lifetime",
  65                 .data           = &rxrpc_max_call_lifetime,
  66                 .maxlen         = sizeof(unsigned),
  67                 .mode           = 0644,
  68                 .proc_handler   = proc_dointvec_jiffies,
  69                 .extra1         = (void *)&one,
  70         },
  71         {
  72                 .procname       = "dead_call_expiry",
  73                 .data           = &rxrpc_dead_call_expiry,
  74                 .maxlen         = sizeof(unsigned),
  75                 .mode           = 0644,
  76                 .proc_handler   = proc_dointvec_jiffies,
  77                 .extra1         = (void *)&one,
  78         },
  79
  80         /* Values measured in seconds */
  81         {
  82                 .procname       = "connection_expiry",
  83                 .data           = &rxrpc_connection_expiry,
  84                 .maxlen         = sizeof(unsigned),
  85                 .mode           = 0644,
  86                 .proc_handler   = proc_dointvec_minmax,
  87                 .extra1         = (void *)&one,
  88         },
  89         {
  90                 .procname       = "transport_expiry",
  91                 .data           = &rxrpc_transport_expiry,
  92                 .maxlen         = sizeof(unsigned),
  93                 .mode           = 0644,
  94                 .proc_handler   = proc_dointvec_minmax,
  95                 .extra1         = (void *)&one,
  96         },
  97         { }
  98 };
  99
 100 int __init rxrpc_sysctl_init(void)
 101 {
 102         rxrpc_sysctl_reg_table = register_net_sysctl(&init_net, "net/rxrpc",
 103                                                      rxrpc_sysctl_table);
 104         if (!rxrpc_sysctl_reg_table)
 105                 return -ENOMEM;
 106         return 0;
 107 }
 108
 109 void rxrpc_sysctl_exit(void)
 110 {
 111         if (rxrpc_sysctl_reg_table)
 112                 unregister_net_sysctl_table(rxrpc_sysctl_reg_table);
 113 }