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 int zero = 0;
  19 static const unsigned int one = 1;
  20 static const unsigned int four = 4;
  21 static const unsigned int thirtytwo = 32;
  22 static const unsigned int n_65535 = 65535;
  23 static const unsigned int n_max_acks = RXRPC_MAXACKS;
  24
  25 /*
  26  * RxRPC operating parameters.
  27  *
  28  * See Documentation/networking/rxrpc.txt and the variable definitions for more
  29  * information on the individual parameters.
  30  */
  31 static struct ctl_table rxrpc_sysctl_table[] = {
  32         /* Values measured in milliseconds */
  33         {
  34                 .procname       = "req_ack_delay",
  35                 .data           = &rxrpc_requested_ack_delay,
  36                 .maxlen         = sizeof(unsigned int),
  37                 .mode           = 0644,
  38                 .proc_handler   = proc_dointvec_ms_jiffies,
  39                 .extra1         = (void *)&zero,
  40         },
  41         {
  42                 .procname       = "soft_ack_delay",
  43                 .data           = &rxrpc_soft_ack_delay,
  44                 .maxlen         = sizeof(unsigned int),
  45                 .mode           = 0644,
  46                 .proc_handler   = proc_dointvec_ms_jiffies,
  47                 .extra1         = (void *)&one,
  48         },
  49         {
  50                 .procname       = "idle_ack_delay",
  51                 .data           = &rxrpc_idle_ack_delay,
  52                 .maxlen         = sizeof(unsigned int),
  53                 .mode           = 0644,
  54                 .proc_handler   = proc_dointvec_ms_jiffies,
  55                 .extra1         = (void *)&one,
  56         },
  57         {
  58                 .procname       = "resend_timeout",
  59                 .data           = &rxrpc_resend_timeout,
  60                 .maxlen         = sizeof(unsigned int),
  61                 .mode           = 0644,
  62                 .proc_handler   = proc_dointvec_ms_jiffies,
  63                 .extra1         = (void *)&one,
  64         },
  65
  66         /* Values measured in seconds but used in jiffies */
  67         {
  68                 .procname       = "max_call_lifetime",
  69                 .data           = &rxrpc_max_call_lifetime,
  70                 .maxlen         = sizeof(unsigned int),
  71                 .mode           = 0644,
  72                 .proc_handler   = proc_dointvec_jiffies,
  73                 .extra1         = (void *)&one,
  74         },
  75         {
  76                 .procname       = "dead_call_expiry",
  77                 .data           = &rxrpc_dead_call_expiry,
  78                 .maxlen         = sizeof(unsigned int),
  79                 .mode           = 0644,
  80                 .proc_handler   = proc_dointvec_jiffies,
  81                 .extra1         = (void *)&one,
  82         },
  83
  84         /* Values measured in seconds */
  85         {
  86                 .procname       = "connection_expiry",
  87                 .data           = &rxrpc_connection_expiry,
  88                 .maxlen         = sizeof(unsigned int),
  89                 .mode           = 0644,
  90                 .proc_handler   = proc_dointvec_minmax,
  91                 .extra1         = (void *)&one,
  92         },
  93
  94         /* Non-time values */
  95         {
  96                 .procname       = "max_backlog",
  97                 .data           = &rxrpc_max_backlog,
  98                 .maxlen         = sizeof(unsigned int),
  99                 .mode           = 0644,
 100                 .proc_handler   = proc_dointvec_minmax,
 101                 .extra1         = (void *)&four,
 102                 .extra2         = (void *)&thirtytwo,
 103         },
 104         {
 105                 .procname       = "rx_window_size",
 106                 .data           = &rxrpc_rx_window_size,
 107                 .maxlen         = sizeof(unsigned int),
 108                 .mode           = 0644,
 109                 .proc_handler   = proc_dointvec_minmax,
 110                 .extra1         = (void *)&one,
 111                 .extra2         = (void *)&n_max_acks,
 112         },
 113         {
 114                 .procname       = "rx_mtu",
 115                 .data           = &rxrpc_rx_mtu,
 116                 .maxlen         = sizeof(unsigned int),
 117                 .mode           = 0644,
 118                 .proc_handler   = proc_dointvec_minmax,
 119                 .extra1         = (void *)&one,
 120                 .extra2         = (void *)&n_65535,
 121         },
 122         {
 123                 .procname       = "rx_jumbo_max",
 124                 .data           = &rxrpc_rx_jumbo_max,
 125                 .maxlen         = sizeof(unsigned int),
 126                 .mode           = 0644,
 127                 .proc_handler   = proc_dointvec_minmax,
 128                 .extra1         = (void *)&one,
 129                 .extra2         = (void *)&four,
 130         },
 131
 132         { }
 133 };
 134
 135 int __init rxrpc_sysctl_init(void)
 136 {
 137         rxrpc_sysctl_reg_table = register_net_sysctl(&init_net, "net/rxrpc",
 138                                                      rxrpc_sysctl_table);
 139         if (!rxrpc_sysctl_reg_table)
 140                 return -ENOMEM;
 141         return 0;
 142 }
 143
 144 void rxrpc_sysctl_exit(void)
 145 {
 146         if (rxrpc_sysctl_reg_table)
 147                 unregister_net_sysctl_table(rxrpc_sysctl_reg_table);
 148 }