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_RXTX_BUFF_SIZE - 1;
  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,
  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,
  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,
  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,
  63                 .extra1         = (void *)&one,
  64         },
  65         {
  66                 .procname       = "idle_conn_expiry",
  67                 .data           = &rxrpc_conn_idle_client_expiry,
  68                 .maxlen         = sizeof(unsigned int),
  69                 .mode           = 0644,
  70                 .proc_handler   = proc_dointvec_ms_jiffies,
  71                 .extra1         = (void *)&one,
  72         },
  73         {
  74                 .procname       = "idle_conn_fast_expiry",
  75                 .data           = &rxrpc_conn_idle_client_fast_expiry,
  76                 .maxlen         = sizeof(unsigned int),
  77                 .mode           = 0644,
  78                 .proc_handler   = proc_dointvec_ms_jiffies,
  79                 .extra1         = (void *)&one,
  80         },
  81
  82         /* Values measured in seconds but used in jiffies */
  83         {
  84                 .procname       = "max_call_lifetime",
  85                 .data           = &rxrpc_max_call_lifetime,
  86                 .maxlen         = sizeof(unsigned int),
  87                 .mode           = 0644,
  88                 .proc_handler   = proc_dointvec,
  89                 .extra1         = (void *)&one,
  90         },
  91
  92         /* Non-time values */
  93         {
  94                 .procname       = "max_client_conns",
  95                 .data           = &rxrpc_max_client_connections,
  96                 .maxlen         = sizeof(unsigned int),
  97                 .mode           = 0644,
  98                 .proc_handler   = proc_dointvec_minmax,
  99                 .extra1         = (void *)&rxrpc_reap_client_connections,
 100         },
 101         {
 102                 .procname       = "reap_client_conns",
 103                 .data           = &rxrpc_reap_client_connections,
 104                 .maxlen         = sizeof(unsigned int),
 105                 .mode           = 0644,
 106                 .proc_handler   = proc_dointvec_minmax,
 107                 .extra1         = (void *)&one,
 108                 .extra2         = (void *)&rxrpc_max_client_connections,
 109         },
 110         {
 111                 .procname       = "max_backlog",
 112                 .data           = &rxrpc_max_backlog,
 113                 .maxlen         = sizeof(unsigned int),
 114                 .mode           = 0644,
 115                 .proc_handler   = proc_dointvec_minmax,
 116                 .extra1         = (void *)&four,
 117                 .extra2         = (void *)&thirtytwo,
 118         },
 119         {
 120                 .procname       = "rx_window_size",
 121                 .data           = &rxrpc_rx_window_size,
 122                 .maxlen         = sizeof(unsigned int),
 123                 .mode           = 0644,
 124                 .proc_handler   = proc_dointvec_minmax,
 125                 .extra1         = (void *)&one,
 126                 .extra2         = (void *)&n_max_acks,
 127         },
 128         {
 129                 .procname       = "rx_mtu",
 130                 .data           = &rxrpc_rx_mtu,
 131                 .maxlen         = sizeof(unsigned int),
 132                 .mode           = 0644,
 133                 .proc_handler   = proc_dointvec_minmax,
 134                 .extra1         = (void *)&one,
 135                 .extra2         = (void *)&n_65535,
 136         },
 137         {
 138                 .procname       = "rx_jumbo_max",
 139                 .data           = &rxrpc_rx_jumbo_max,
 140                 .maxlen         = sizeof(unsigned int),
 141                 .mode           = 0644,
 142                 .proc_handler   = proc_dointvec_minmax,
 143                 .extra1         = (void *)&one,
 144                 .extra2         = (void *)&four,
 145         },
 146
 147         { }
 148 };
 149
 150 int __init rxrpc_sysctl_init(void)
 151 {
 152         rxrpc_sysctl_reg_table = register_net_sysctl(&init_net, "net/rxrpc",
 153                                                      rxrpc_sysctl_table);
 154         if (!rxrpc_sysctl_reg_table)
 155                 return -ENOMEM;
 156         return 0;
 157 }
 158
 159 void rxrpc_sysctl_exit(void)
 160 {
 161         if (rxrpc_sysctl_reg_table)
 162                 unregister_net_sysctl_table(rxrpc_sysctl_reg_table);
 163 }