LXR linux/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
  17static struct ctl_table_header *rxrpc_sysctl_reg_table;
  18static const unsigned int zero = 0;
  19static const unsigned int one = 1;
  20static const unsigned int four = 4;
  21static const unsigned int thirtytwo = 32;
  22static const unsigned int n_65535 = 65535;
  23static 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 */
  31static 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
 150int __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
 159void rxrpc_sysctl_exit(void)
 160{
 161        if (rxrpc_sysctl_reg_table)
 162                unregister_net_sysctl_table(rxrpc_sysctl_reg_table);
 163}
 164