LXR linux/net/irda/irsysctl.c

   1/*********************************************************************
   2 *
   3 * Filename:      irsysctl.c
   4 * Version:       1.0
   5 * Description:   Sysctl interface for IrDA
   6 * Status:        Experimental.
   7 * Author:        Dag Brattli <dagb@cs.uit.no>
   8 * Created at:    Sun May 24 22:12:06 1998
   9 * Modified at:   Fri Jun  4 02:50:15 1999
  10 * Modified by:   Dag Brattli <dagb@cs.uit.no>
  11 *
  12 *     Copyright (c) 1997, 1999 Dag Brattli, All Rights Reserved.
  13 *     Copyright (c) 2000-2001 Jean Tourrilhes <jt@hpl.hp.com>
  14 *
  15 *     This program is free software; you can redistribute it and/or
  16 *     modify it under the terms of the GNU General Public License as
  17 *     published by the Free Software Foundation; either version 2 of
  18 *     the License, or (at your option) any later version.
  19 *
  20 *     Neither Dag Brattli nor University of Tromsø admit liability nor
  21 *     provide warranty for any of this software. This material is
  22 *     provided "AS-IS" and at no charge.
  23 *
  24 ********************************************************************/
  25
  26#include <linux/mm.h>
  27#include <linux/ctype.h>
  28#include <linux/sysctl.h>
  29#include <linux/init.h>
  30
  31#include <net/irda/irda.h>              /* irda_debug */
  32#include <net/irda/irlmp.h>
  33#include <net/irda/timer.h>
  34#include <net/irda/irias_object.h>
  35
  36extern int  sysctl_discovery;
  37extern int  sysctl_discovery_slots;
  38extern int  sysctl_discovery_timeout;
  39extern int  sysctl_slot_timeout;
  40extern int  sysctl_fast_poll_increase;
  41extern char sysctl_devname[];
  42extern int  sysctl_max_baud_rate;
  43extern int  sysctl_min_tx_turn_time;
  44extern int  sysctl_max_tx_data_size;
  45extern int  sysctl_max_tx_window;
  46extern int  sysctl_max_noreply_time;
  47extern int  sysctl_warn_noreply_time;
  48extern int  sysctl_lap_keepalive_time;
  49
  50extern struct irlmp_cb *irlmp;
  51
  52/* this is needed for the proc_dointvec_minmax - Jean II */
  53static int max_discovery_slots = 16;            /* ??? */
  54static int min_discovery_slots = 1;
  55/* IrLAP 6.13.2 says 25ms to 10+70ms - allow higher since some devices
  56 * seems to require it. (from Dag's comment) */
  57static int max_slot_timeout = 160;
  58static int min_slot_timeout = 20;
  59static int max_max_baud_rate = 16000000;        /* See qos.c - IrLAP spec */
  60static int min_max_baud_rate = 2400;
  61static int max_min_tx_turn_time = 10000;        /* See qos.c - IrLAP spec */
  62static int min_min_tx_turn_time;
  63static int max_max_tx_data_size = 2048;         /* See qos.c - IrLAP spec */
  64static int min_max_tx_data_size = 64;
  65static int max_max_tx_window = 7;               /* See qos.c - IrLAP spec */
  66static int min_max_tx_window = 1;
  67static int max_max_noreply_time = 40;           /* See qos.c - IrLAP spec */
  68static int min_max_noreply_time = 3;
  69static int max_warn_noreply_time = 3;           /* 3s == standard */
  70static int min_warn_noreply_time = 1;           /* 1s == min WD_TIMER */
  71static int max_lap_keepalive_time = 10000;      /* 10s */
  72static int min_lap_keepalive_time = 100;        /* 100us */
  73/* For other sysctl, I've no idea of the range. Maybe Dag could help
  74 * us on that - Jean II */
  75
  76static int do_devname(ctl_table *table, int write,
  77                      void __user *buffer, size_t *lenp, loff_t *ppos)
  78{
  79        int ret;
  80
  81        ret = proc_dostring(table, write, buffer, lenp, ppos);
  82        if (ret == 0 && write) {
  83                struct ias_value *val;
  84
  85                val = irias_new_string_value(sysctl_devname);
  86                if (val)
  87                        irias_object_change_attribute("Device", "DeviceName", val);
  88        }
  89        return ret;
  90}
  91
  92
  93static int do_discovery(ctl_table *table, int write,
  94                    void __user *buffer, size_t *lenp, loff_t *ppos)
  95{
  96       int ret;
  97
  98       ret = proc_dointvec(table, write, buffer, lenp, ppos);
  99       if (ret)
 100               return ret;
 101
 102       if (irlmp == NULL)
 103               return -ENODEV;
 104
 105       if (sysctl_discovery)
 106               irlmp_start_discovery_timer(irlmp, sysctl_discovery_timeout*HZ);
 107       else
 108               del_timer_sync(&irlmp->discovery_timer);
 109
 110       return ret;
 111}
 112
 113/* One file */
 114static ctl_table irda_table[] = {
 115        {
 116                .procname       = "discovery",
 117                .data           = &sysctl_discovery,
 118                .maxlen         = sizeof(int),
 119                .mode           = 0644,
 120                .proc_handler   = do_discovery,
 121        },
 122        {
 123                .procname       = "devname",
 124                .data           = sysctl_devname,
 125                .maxlen         = 65,
 126                .mode           = 0644,
 127                .proc_handler   = do_devname,
 128        },
 129#ifdef CONFIG_IRDA_DEBUG
 130        {
 131                .procname       = "debug",
 132                .data           = &irda_debug,
 133                .maxlen         = sizeof(int),
 134                .mode           = 0644,
 135                .proc_handler   = proc_dointvec
 136        },
 137#endif
 138#ifdef CONFIG_IRDA_FAST_RR
 139        {
 140                .procname       = "fast_poll_increase",
 141                .data           = &sysctl_fast_poll_increase,
 142                .maxlen         = sizeof(int),
 143                .mode           = 0644,
 144                .proc_handler   = proc_dointvec
 145        },
 146#endif
 147        {
 148                .procname       = "discovery_slots",
 149                .data           = &sysctl_discovery_slots,
 150                .maxlen         = sizeof(int),
 151                .mode           = 0644,
 152                .proc_handler   = proc_dointvec_minmax,
 153                .extra1         = &min_discovery_slots,
 154                .extra2         = &max_discovery_slots
 155        },
 156        {
 157                .procname       = "discovery_timeout",
 158                .data           = &sysctl_discovery_timeout,
 159                .maxlen         = sizeof(int),
 160                .mode           = 0644,
 161                .proc_handler   = proc_dointvec
 162        },
 163        {
 164                .procname       = "slot_timeout",
 165                .data           = &sysctl_slot_timeout,
 166                .maxlen         = sizeof(int),
 167                .mode           = 0644,
 168                .proc_handler   = proc_dointvec_minmax,
 169                .extra1         = &min_slot_timeout,
 170                .extra2         = &max_slot_timeout
 171        },
 172        {
 173                .procname       = "max_baud_rate",
 174                .data           = &sysctl_max_baud_rate,
 175                .maxlen         = sizeof(int),
 176                .mode           = 0644,
 177                .proc_handler   = proc_dointvec_minmax,
 178                .extra1         = &min_max_baud_rate,
 179                .extra2         = &max_max_baud_rate
 180        },
 181        {
 182                .procname       = "min_tx_turn_time",
 183                .data           = &sysctl_min_tx_turn_time,
 184                .maxlen         = sizeof(int),
 185                .mode           = 0644,
 186                .proc_handler   = proc_dointvec_minmax,
 187                .extra1         = &min_min_tx_turn_time,
 188                .extra2         = &max_min_tx_turn_time
 189        },
 190        {
 191                .procname       = "max_tx_data_size",
 192                .data           = &sysctl_max_tx_data_size,
 193                .maxlen         = sizeof(int),
 194                .mode           = 0644,
 195                .proc_handler   = proc_dointvec_minmax,
 196                .extra1         = &min_max_tx_data_size,
 197                .extra2         = &max_max_tx_data_size
 198        },
 199        {
 200                .procname       = "max_tx_window",
 201                .data           = &sysctl_max_tx_window,
 202                .maxlen         = sizeof(int),
 203                .mode           = 0644,
 204                .proc_handler   = proc_dointvec_minmax,
 205                .extra1         = &min_max_tx_window,
 206                .extra2         = &max_max_tx_window
 207        },
 208        {
 209                .procname       = "max_noreply_time",
 210                .data           = &sysctl_max_noreply_time,
 211                .maxlen         = sizeof(int),
 212                .mode           = 0644,
 213                .proc_handler   = proc_dointvec_minmax,
 214                .extra1         = &min_max_noreply_time,
 215                .extra2         = &max_max_noreply_time
 216        },
 217        {
 218                .procname       = "warn_noreply_time",
 219                .data           = &sysctl_warn_noreply_time,
 220                .maxlen         = sizeof(int),
 221                .mode           = 0644,
 222                .proc_handler   = proc_dointvec_minmax,
 223                .extra1         = &min_warn_noreply_time,
 224                .extra2         = &max_warn_noreply_time
 225        },
 226        {
 227                .procname       = "lap_keepalive_time",
 228                .data           = &sysctl_lap_keepalive_time,
 229                .maxlen         = sizeof(int),
 230                .mode           = 0644,
 231                .proc_handler   = proc_dointvec_minmax,
 232                .extra1         = &min_lap_keepalive_time,
 233                .extra2         = &max_lap_keepalive_time
 234        },
 235        { }
 236};
 237
 238static struct ctl_path irda_path[] = {
 239        { .procname = "net", },
 240        { .procname = "irda", },
 241        { }
 242};
 243
 244static struct ctl_table_header *irda_table_header;
 245
 246/*
 247 * Function irda_sysctl_register (void)
 248 *
 249 *    Register our sysctl interface
 250 *
 251 */
 252int __init irda_sysctl_register(void)
 253{
 254        irda_table_header = register_sysctl_paths(irda_path, irda_table);
 255        if (!irda_table_header)
 256                return -ENOMEM;
 257
 258        return 0;
 259}
 260
 261/*
 262 * Function irda_sysctl_unregister (void)
 263 *
 264 *    Unregister our sysctl interface
 265 *
 266 */
 267void irda_sysctl_unregister(void)
 268{
 269        unregister_sysctl_table(irda_table_header);
 270}
 271
 272
 273
 274