kernel/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 static const unsigned four = 4;
  21 static const unsigned n_65535 = 65535;
  22 static const unsigned n_max_acks = RXRPC_MAXACKS;
  23
  24 /*
  25  * RxRPC operating parameters.
  26  *
  27  * See Documentation/networking/rxrpc.txt and the variable definitions for more
  28  * information on the individual parameters.
  29  */
  30 static struct ctl_table rxrpc_sysctl_table[] = {
  31         /* Values measured in milliseconds */
  32         {
  33                 .procname       = "req_ack_delay",
  34                 .data           = &rxrpc_requested_ack_delay,
  35                 .maxlen         = sizeof(unsigned),
  36                 .mode           = 0644,
  37                 .proc_handler   = proc_dointvec_ms_jiffies,
  38                 .extra1         = (void *)&zero,
  39         },
  40         {
  41                 .procname       = "soft_ack_delay",
  42                 .data           = &rxrpc_soft_ack_delay,
  43                 .maxlen         = sizeof(unsigned),
  44                 .mode           = 0644,
  45                 .proc_handler   = proc_dointvec_ms_jiffies,
  46                 .extra1         = (void *)&one,
  47         },
  48         {
  49                 .procname       = "idle_ack_delay",
  50                 .data           = &rxrpc_idle_ack_delay,
  51                 .maxlen         = sizeof(unsigned),
  52                 .mode           = 0644,
  53                 .proc_handler   = proc_dointvec_ms_jiffies,
  54                 .extra1         = (void *)&one,
  55         },
  56         {
  57                 .procname       = "resend_timeout",
  58                 .data           = &rxrpc_resend_timeout,
  59                 .maxlen         = sizeof(unsigned),
  60                 .mode           = 0644,
  61                 .proc_handler   = proc_dointvec_ms_jiffies,
  62                 .extra1         = (void *)&one,
  63         },
  64
  65         /* Values measured in seconds but used in jiffies */
  66         {
  67                 .procname       = "max_call_lifetime",
  68                 .data           = &rxrpc_max_call_lifetime,
  69                 .maxlen         = sizeof(unsigned),
  70                 .mode           = 0644,
  71                 .proc_handler   = proc_dointvec_jiffies,
  72                 .extra1         = (void *)&one,
  73         },
  74         {
  75                 .procname       = "dead_call_expiry",
  76                 .data           = &rxrpc_dead_call_expiry,
  77                 .maxlen         = sizeof(unsigned),
  78                 .mode           = 0644,
  79                 .proc_handler   = proc_dointvec_jiffies,
  80                 .extra1         = (void *)&one,
  81         },
  82
  83         /* Values measured in seconds */
  84         {
  85                 .procname       = "connection_expiry",
  86                 .data           = &rxrpc_connection_expiry,
  87                 .maxlen         = sizeof(unsigned),
  88                 .mode           = 0644,
  89                 .proc_handler   = proc_dointvec_minmax,
  90                 .extra1         = (void *)&one,
  91         },
  92         {
  93                 .procname       = "transport_expiry",
  94                 .data           = &rxrpc_transport_expiry,
  95                 .maxlen         = sizeof(unsigned),
  96                 .mode           = 0644,
  97                 .proc_handler   = proc_dointvec_minmax,
  98                 .extra1         = (void *)&one,
  99         },
 100
 101         /* Non-time values */
 102         {
 103                 .procname       = "rx_window_size",
 104                 .data           = &rxrpc_rx_window_size,
 105                 .maxlen         = sizeof(unsigned),
 106                 .mode           = 0644,
 107                 .proc_handler   = proc_dointvec_minmax,
 108                 .extra1         = (void *)&one,
 109                 .extra2         = (void *)&n_max_acks,
 110         },
 111         {
 112                 .procname       = "rx_mtu",
 113                 .data           = &rxrpc_rx_mtu,
 114                 .maxlen         = sizeof(unsigned),
 115                 .mode           = 0644,
 116                 .proc_handler   = proc_dointvec_minmax,
 117                 .extra1         = (void *)&one,
 118                 .extra1         = (void *)&n_65535,
 119         },
 120         {
 121                 .procname       = "rx_jumbo_max",
 122                 .data           = &rxrpc_rx_jumbo_max,
 123                 .maxlen         = sizeof(unsigned),
 124                 .mode           = 0644,
 125                 .proc_handler   = proc_dointvec_minmax,
 126                 .extra1         = (void *)&one,
 127                 .extra2         = (void *)&four,
 128         },
 129
 130         { }
 131 };
 132
 133 int __init rxrpc_sysctl_init(void)
 134 {
 135         rxrpc_sysctl_reg_table = register_net_sysctl(&init_net, "net/rxrpc",
 136                                                      rxrpc_sysctl_table);
 137         if (!rxrpc_sysctl_reg_table)
 138                 return -ENOMEM;
 139         return 0;
 140 }
 141
 142 void rxrpc_sysctl_exit(void)
 143 {
 144         if (rxrpc_sysctl_reg_table)
 145                 unregister_net_sysctl_table(rxrpc_sysctl_reg_table);
 146 }