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   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
  36 extern int  sysctl_discovery;
  37 extern int  sysctl_discovery_slots;
  38 extern int  sysctl_discovery_timeout;
  39 extern int  sysctl_slot_timeout;
  40 extern int  sysctl_fast_poll_increase;
  41 extern char sysctl_devname[];
  42 extern int  sysctl_max_baud_rate;
  43 extern int  sysctl_min_tx_turn_time;
  44 extern int  sysctl_max_tx_data_size;
  45 extern int  sysctl_max_tx_window;
  46 extern int  sysctl_max_noreply_time;
  47 extern int  sysctl_warn_noreply_time;
  48 extern int  sysctl_lap_keepalive_time;
  49
  50 extern struct irlmp_cb *irlmp;
  51
  52 /* this is needed for the proc_dointvec_minmax - Jean II */
  53 static int max_discovery_slots = 16;            /* ??? */
  54 static 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) */
  57 static int max_slot_timeout = 160;
  58 static int min_slot_timeout = 20;
  59 static int max_max_baud_rate = 16000000;        /* See qos.c - IrLAP spec */
  60 static int min_max_baud_rate = 2400;
  61 static int max_min_tx_turn_time = 10000;        /* See qos.c - IrLAP spec */
  62 static int min_min_tx_turn_time;
  63 static int max_max_tx_data_size = 2048;         /* See qos.c - IrLAP spec */
  64 static int min_max_tx_data_size = 64;
  65 static int max_max_tx_window = 7;               /* See qos.c - IrLAP spec */
  66 static int min_max_tx_window = 1;
  67 static int max_max_noreply_time = 40;           /* See qos.c - IrLAP spec */
  68 static int min_max_noreply_time = 3;
  69 static int max_warn_noreply_time = 3;           /* 3s == standard */
  70 static int min_warn_noreply_time = 1;           /* 1s == min WD_TIMER */
  71 static int max_lap_keepalive_time = 10000;      /* 10s */
  72 static 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
  76 static int do_devname(ctl_table *table, int write, struct file *filp,
  77                       void __user *buffer, size_t *lenp, loff_t *ppos)
  78 {
  79         int ret;
  80
  81         ret = proc_dostring(table, write, filp, 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
  93 static int do_discovery(ctl_table *table, int write, struct file *filp,
  94                     void __user *buffer, size_t *lenp, loff_t *ppos)
  95 {
  96        int ret;
  97
  98        ret = proc_dointvec(table, write, filp, 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 */
 114 static ctl_table irda_table[] = {
 115         {
 116                 .ctl_name       = NET_IRDA_DISCOVERY,
 117                 .procname       = "discovery",
 118                 .data           = &sysctl_discovery,
 119                 .maxlen         = sizeof(int),
 120                 .mode           = 0644,
 121                 .proc_handler   = do_discovery,
 122                 .strategy       = sysctl_intvec
 123         },
 124         {
 125                 .ctl_name       = NET_IRDA_DEVNAME,
 126                 .procname       = "devname",
 127                 .data           = sysctl_devname,
 128                 .maxlen         = 65,
 129                 .mode           = 0644,
 130                 .proc_handler   = do_devname,
 131                 .strategy       = sysctl_string
 132         },
 133 #ifdef CONFIG_IRDA_DEBUG
 134         {
 135                 .ctl_name       = NET_IRDA_DEBUG,
 136                 .procname       = "debug",
 137                 .data           = &irda_debug,
 138                 .maxlen         = sizeof(int),
 139                 .mode           = 0644,
 140                 .proc_handler   = proc_dointvec
 141         },
 142 #endif
 143 #ifdef CONFIG_IRDA_FAST_RR
 144         {
 145                 .ctl_name       = NET_IRDA_FAST_POLL,
 146                 .procname       = "fast_poll_increase",
 147                 .data           = &sysctl_fast_poll_increase,
 148                 .maxlen         = sizeof(int),
 149                 .mode           = 0644,
 150                 .proc_handler   = proc_dointvec
 151         },
 152 #endif
 153         {
 154                 .ctl_name       = NET_IRDA_DISCOVERY_SLOTS,
 155                 .procname       = "discovery_slots",
 156                 .data           = &sysctl_discovery_slots,
 157                 .maxlen         = sizeof(int),
 158                 .mode           = 0644,
 159                 .proc_handler   = proc_dointvec_minmax,
 160                 .strategy       = sysctl_intvec,
 161                 .extra1         = &min_discovery_slots,
 162                 .extra2         = &max_discovery_slots
 163         },
 164         {
 165                 .ctl_name       = NET_IRDA_DISCOVERY_TIMEOUT,
 166                 .procname       = "discovery_timeout",
 167                 .data           = &sysctl_discovery_timeout,
 168                 .maxlen         = sizeof(int),
 169                 .mode           = 0644,
 170                 .proc_handler   = proc_dointvec
 171         },
 172         {
 173                 .ctl_name       = NET_IRDA_SLOT_TIMEOUT,
 174                 .procname       = "slot_timeout",
 175                 .data           = &sysctl_slot_timeout,
 176                 .maxlen         = sizeof(int),
 177                 .mode           = 0644,
 178                 .proc_handler   = proc_dointvec_minmax,
 179                 .strategy       = sysctl_intvec,
 180                 .extra1         = &min_slot_timeout,
 181                 .extra2         = &max_slot_timeout
 182         },
 183         {
 184                 .ctl_name       = NET_IRDA_MAX_BAUD_RATE,
 185                 .procname       = "max_baud_rate",
 186                 .data           = &sysctl_max_baud_rate,
 187                 .maxlen         = sizeof(int),
 188                 .mode           = 0644,
 189                 .proc_handler   = proc_dointvec_minmax,
 190                 .strategy       = sysctl_intvec,
 191                 .extra1         = &min_max_baud_rate,
 192                 .extra2         = &max_max_baud_rate
 193         },
 194         {
 195                 .ctl_name       = NET_IRDA_MIN_TX_TURN_TIME,
 196                 .procname       = "min_tx_turn_time",
 197                 .data           = &sysctl_min_tx_turn_time,
 198                 .maxlen         = sizeof(int),
 199                 .mode           = 0644,
 200                 .proc_handler   = proc_dointvec_minmax,
 201                 .strategy       = sysctl_intvec,
 202                 .extra1         = &min_min_tx_turn_time,
 203                 .extra2         = &max_min_tx_turn_time
 204         },
 205         {
 206                 .ctl_name       = NET_IRDA_MAX_TX_DATA_SIZE,
 207                 .procname       = "max_tx_data_size",
 208                 .data           = &sysctl_max_tx_data_size,
 209                 .maxlen         = sizeof(int),
 210                 .mode           = 0644,
 211                 .proc_handler   = proc_dointvec_minmax,
 212                 .strategy       = sysctl_intvec,
 213                 .extra1         = &min_max_tx_data_size,
 214                 .extra2         = &max_max_tx_data_size
 215         },
 216         {
 217                 .ctl_name       = NET_IRDA_MAX_TX_WINDOW,
 218                 .procname       = "max_tx_window",
 219                 .data           = &sysctl_max_tx_window,
 220                 .maxlen         = sizeof(int),
 221                 .mode           = 0644,
 222                 .proc_handler   = proc_dointvec_minmax,
 223                 .strategy       = sysctl_intvec,
 224                 .extra1         = &min_max_tx_window,
 225                 .extra2         = &max_max_tx_window
 226         },
 227         {
 228                 .ctl_name       = NET_IRDA_MAX_NOREPLY_TIME,
 229                 .procname       = "max_noreply_time",
 230                 .data           = &sysctl_max_noreply_time,
 231                 .maxlen         = sizeof(int),
 232                 .mode           = 0644,
 233                 .proc_handler   = proc_dointvec_minmax,
 234                 .strategy       = sysctl_intvec,
 235                 .extra1         = &min_max_noreply_time,
 236                 .extra2         = &max_max_noreply_time
 237         },
 238         {
 239                 .ctl_name       = NET_IRDA_WARN_NOREPLY_TIME,
 240                 .procname       = "warn_noreply_time",
 241                 .data           = &sysctl_warn_noreply_time,
 242                 .maxlen         = sizeof(int),
 243                 .mode           = 0644,
 244                 .proc_handler   = proc_dointvec_minmax,
 245                 .strategy       = sysctl_intvec,
 246                 .extra1         = &min_warn_noreply_time,
 247                 .extra2         = &max_warn_noreply_time
 248         },
 249         {
 250                 .ctl_name       = NET_IRDA_LAP_KEEPALIVE_TIME,
 251                 .procname       = "lap_keepalive_time",
 252                 .data           = &sysctl_lap_keepalive_time,
 253                 .maxlen         = sizeof(int),
 254                 .mode           = 0644,
 255                 .proc_handler   = proc_dointvec_minmax,
 256                 .strategy       = sysctl_intvec,
 257                 .extra1         = &min_lap_keepalive_time,
 258                 .extra2         = &max_lap_keepalive_time
 259         },
 260         { .ctl_name = 0 }
 261 };
 262
 263 static struct ctl_path irda_path[] = {
 264         { .procname = "net", .ctl_name = CTL_NET, },
 265         { .procname = "irda", .ctl_name = NET_IRDA, },
 266         { }
 267 };
 268
 269 static struct ctl_table_header *irda_table_header;
 270
 271 /*
 272  * Function irda_sysctl_register (void)
 273  *
 274  *    Register our sysctl interface
 275  *
 276  */
 277 int __init irda_sysctl_register(void)
 278 {
 279         irda_table_header = register_sysctl_paths(irda_path, irda_table);
 280         if (!irda_table_header)
 281                 return -ENOMEM;
 282
 283         return 0;
 284 }
 285
 286 /*
 287  * Function irda_sysctl_unregister (void)
 288  *
 289  *    Unregister our sysctl interface
 290  *
 291  */
 292 void irda_sysctl_unregister(void)
 293 {
 294         unregister_sysctl_table(irda_table_header);
 295 }
 296
 297
 298