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 static const unsigned long one_jiffy = 1;
  25 static const unsigned long max_jiffies = MAX_JIFFY_OFFSET;
  26
  27 /*
  28  * RxRPC operating parameters.
  29  *
  30  * See Documentation/networking/rxrpc.txt and the variable definitions for more
  31  * information on the individual parameters.
  32  */
  33 static struct ctl_table rxrpc_sysctl_table[] = {
  34         /* Values measured in milliseconds but used in jiffies */
  35         {
  36                 .procname       = "req_ack_delay",
  37                 .data           = &rxrpc_requested_ack_delay,
  38                 .maxlen         = sizeof(unsigned long),
  39                 .mode           = 0644,
  40                 .proc_handler   = proc_doulongvec_ms_jiffies_minmax,
  41                 .extra1         = (void *)&one_jiffy,
  42                 .extra2         = (void *)&max_jiffies,
  43         },
  44         {
  45                 .procname       = "soft_ack_delay",
  46                 .data           = &rxrpc_soft_ack_delay,
  47                 .maxlen         = sizeof(unsigned long),
  48                 .mode           = 0644,
  49                 .proc_handler   = proc_doulongvec_ms_jiffies_minmax,
  50                 .extra1         = (void *)&one_jiffy,
  51                 .extra2         = (void *)&max_jiffies,
  52         },
  53         {
  54                 .procname       = "idle_ack_delay",
  55                 .data           = &rxrpc_idle_ack_delay,
  56                 .maxlen         = sizeof(unsigned long),
  57                 .mode           = 0644,
  58                 .proc_handler   = proc_doulongvec_ms_jiffies_minmax,
  59                 .extra1         = (void *)&one_jiffy,
  60                 .extra2         = (void *)&max_jiffies,
  61         },
  62         {
  63                 .procname       = "idle_conn_expiry",
  64                 .data           = &rxrpc_conn_idle_client_expiry,
  65                 .maxlen         = sizeof(unsigned long),
  66                 .mode           = 0644,
  67                 .proc_handler   = proc_doulongvec_ms_jiffies_minmax,
  68                 .extra1         = (void *)&one_jiffy,
  69                 .extra2         = (void *)&max_jiffies,
  70         },
  71         {
  72                 .procname       = "idle_conn_fast_expiry",
  73                 .data           = &rxrpc_conn_idle_client_fast_expiry,
  74                 .maxlen         = sizeof(unsigned long),
  75                 .mode           = 0644,
  76                 .proc_handler   = proc_doulongvec_ms_jiffies_minmax,
  77                 .extra1         = (void *)&one_jiffy,
  78                 .extra2         = (void *)&max_jiffies,
  79         },
  80         {
  81                 .procname       = "resend_timeout",
  82                 .data           = &rxrpc_resend_timeout,
  83                 .maxlen         = sizeof(unsigned long),
  84                 .mode           = 0644,
  85                 .proc_handler   = proc_doulongvec_ms_jiffies_minmax,
  86                 .extra1         = (void *)&one_jiffy,
  87                 .extra2         = (void *)&max_jiffies,
  88         },
  89
  90         /* Non-time values */
  91         {
  92                 .procname       = "max_client_conns",
  93                 .data           = &rxrpc_max_client_connections,
  94                 .maxlen         = sizeof(unsigned int),
  95                 .mode           = 0644,
  96                 .proc_handler   = proc_dointvec_minmax,
  97                 .extra1         = (void *)&rxrpc_reap_client_connections,
  98         },
  99         {
 100                 .procname       = "reap_client_conns",
 101                 .data           = &rxrpc_reap_client_connections,
 102                 .maxlen         = sizeof(unsigned int),
 103                 .mode           = 0644,
 104                 .proc_handler   = proc_dointvec_minmax,
 105                 .extra1         = (void *)&one,
 106                 .extra2         = (void *)&rxrpc_max_client_connections,
 107         },
 108         {
 109                 .procname       = "max_backlog",
 110                 .data           = &rxrpc_max_backlog,
 111                 .maxlen         = sizeof(unsigned int),
 112                 .mode           = 0644,
 113                 .proc_handler   = proc_dointvec_minmax,
 114                 .extra1         = (void *)&four,
 115                 .extra2         = (void *)&thirtytwo,
 116         },
 117         {
 118                 .procname       = "rx_window_size",
 119                 .data           = &rxrpc_rx_window_size,
 120                 .maxlen         = sizeof(unsigned int),
 121                 .mode           = 0644,
 122                 .proc_handler   = proc_dointvec_minmax,
 123                 .extra1         = (void *)&one,
 124                 .extra2         = (void *)&n_max_acks,
 125         },
 126         {
 127                 .procname       = "rx_mtu",
 128                 .data           = &rxrpc_rx_mtu,
 129                 .maxlen         = sizeof(unsigned int),
 130                 .mode           = 0644,
 131                 .proc_handler   = proc_dointvec_minmax,
 132                 .extra1         = (void *)&one,
 133                 .extra2         = (void *)&n_65535,
 134         },
 135         {
 136                 .procname       = "rx_jumbo_max",
 137                 .data           = &rxrpc_rx_jumbo_max,
 138                 .maxlen         = sizeof(unsigned int),
 139                 .mode           = 0644,
 140                 .proc_handler   = proc_dointvec_minmax,
 141                 .extra1         = (void *)&one,
 142                 .extra2         = (void *)&four,
 143         },
 144
 145         { }
 146 };
 147
 148 int __init rxrpc_sysctl_init(void)
 149 {
 150         rxrpc_sysctl_reg_table = register_net_sysctl(&init_net, "net/rxrpc",
 151                                                      rxrpc_sysctl_table);
 152         if (!rxrpc_sysctl_reg_table)
 153                 return -ENOMEM;
 154         return 0;
 155 }
 156
 157 void rxrpc_sysctl_exit(void)
 158 {
 159         if (rxrpc_sysctl_reg_table)
 160                 unregister_net_sysctl_table(rxrpc_sysctl_reg_table);
 161 }