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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/irias_object.h>
  33
  34 extern int  sysctl_discovery;
  35 extern int  sysctl_discovery_slots;
  36 extern int  sysctl_discovery_timeout;
  37 extern int  sysctl_slot_timeout;
  38 extern int  sysctl_fast_poll_increase;
  39 extern char sysctl_devname[];
  40 extern int  sysctl_max_baud_rate;
  41 extern int  sysctl_min_tx_turn_time;
  42 extern int  sysctl_max_tx_data_size;
  43 extern int  sysctl_max_tx_window;
  44 extern int  sysctl_max_noreply_time;
  45 extern int  sysctl_warn_noreply_time;
  46 extern int  sysctl_lap_keepalive_time;
  47
  48 /* this is needed for the proc_dointvec_minmax - Jean II */
  49 static int max_discovery_slots = 16;            /* ??? */
  50 static int min_discovery_slots = 1;
  51 /* IrLAP 6.13.2 says 25ms to 10+70ms - allow higher since some devices
  52  * seems to require it. (from Dag's comment) */
  53 static int max_slot_timeout = 160;
  54 static int min_slot_timeout = 20;
  55 static int max_max_baud_rate = 16000000;        /* See qos.c - IrLAP spec */
  56 static int min_max_baud_rate = 2400;
  57 static int max_min_tx_turn_time = 10000;        /* See qos.c - IrLAP spec */
  58 static int min_min_tx_turn_time;
  59 static int max_max_tx_data_size = 2048;         /* See qos.c - IrLAP spec */
  60 static int min_max_tx_data_size = 64;
  61 static int max_max_tx_window = 7;               /* See qos.c - IrLAP spec */
  62 static int min_max_tx_window = 1;
  63 static int max_max_noreply_time = 40;           /* See qos.c - IrLAP spec */
  64 static int min_max_noreply_time = 3;
  65 static int max_warn_noreply_time = 3;           /* 3s == standard */
  66 static int min_warn_noreply_time = 1;           /* 1s == min WD_TIMER */
  67 static int max_lap_keepalive_time = 10000;      /* 10s */
  68 static int min_lap_keepalive_time = 100;        /* 100us */
  69 /* For other sysctl, I've no idea of the range. Maybe Dag could help
  70  * us on that - Jean II */
  71
  72 static int do_devname(ctl_table *table, int write, struct file *filp,
  73                       void __user *buffer, size_t *lenp, loff_t *ppos)
  74 {
  75         int ret;
  76
  77         ret = proc_dostring(table, write, filp, buffer, lenp, ppos);
  78         if (ret == 0 && write) {
  79                 struct ias_value *val;
  80
  81                 val = irias_new_string_value(sysctl_devname);
  82                 if (val)
  83                         irias_object_change_attribute("Device", "DeviceName", val);
  84         }
  85         return ret;
  86 }
  87
  88 /* One file */
  89 static ctl_table irda_table[] = {
  90         {
  91                 .ctl_name       = NET_IRDA_DISCOVERY,
  92                 .procname       = "discovery",
  93                 .data           = &sysctl_discovery,
  94                 .maxlen         = sizeof(int),
  95                 .mode           = 0644,
  96                 .proc_handler   = &proc_dointvec
  97         },
  98         {
  99                 .ctl_name       = NET_IRDA_DEVNAME,
 100                 .procname       = "devname",
 101                 .data           = sysctl_devname,
 102                 .maxlen         = 65,
 103                 .mode           = 0644,
 104                 .proc_handler   = &do_devname,
 105                 .strategy       = &sysctl_string
 106         },
 107 #ifdef CONFIG_IRDA_DEBUG
 108         {
 109                 .ctl_name       = NET_IRDA_DEBUG,
 110                 .procname       = "debug",
 111                 .data           = &irda_debug,
 112                 .maxlen         = sizeof(int),
 113                 .mode           = 0644,
 114                 .proc_handler   = &proc_dointvec
 115         },
 116 #endif
 117 #ifdef CONFIG_IRDA_FAST_RR
 118         {
 119                 .ctl_name       = NET_IRDA_FAST_POLL,
 120                 .procname       = "fast_poll_increase",
 121                 .data           = &sysctl_fast_poll_increase,
 122                 .maxlen         = sizeof(int),
 123                 .mode           = 0644,
 124                 .proc_handler   = &proc_dointvec
 125         },
 126 #endif
 127         {
 128                 .ctl_name       = NET_IRDA_DISCOVERY_SLOTS,
 129                 .procname       = "discovery_slots",
 130                 .data           = &sysctl_discovery_slots,
 131                 .maxlen         = sizeof(int),
 132                 .mode           = 0644,
 133                 .proc_handler   = &proc_dointvec_minmax,
 134                 .strategy       = &sysctl_intvec,
 135                 .extra1         = &min_discovery_slots,
 136                 .extra2         = &max_discovery_slots
 137         },
 138         {
 139                 .ctl_name       = NET_IRDA_DISCOVERY_TIMEOUT,
 140                 .procname       = "discovery_timeout",
 141                 .data           = &sysctl_discovery_timeout,
 142                 .maxlen         = sizeof(int),
 143                 .mode           = 0644,
 144                 .proc_handler   = &proc_dointvec
 145         },
 146         {
 147                 .ctl_name       = NET_IRDA_SLOT_TIMEOUT,
 148                 .procname       = "slot_timeout",
 149                 .data           = &sysctl_slot_timeout,
 150                 .maxlen         = sizeof(int),
 151                 .mode           = 0644,
 152                 .proc_handler   = &proc_dointvec_minmax,
 153                 .strategy       = &sysctl_intvec,
 154                 .extra1         = &min_slot_timeout,
 155                 .extra2         = &max_slot_timeout
 156         },
 157         {
 158                 .ctl_name       = NET_IRDA_MAX_BAUD_RATE,
 159                 .procname       = "max_baud_rate",
 160                 .data           = &sysctl_max_baud_rate,
 161                 .maxlen         = sizeof(int),
 162                 .mode           = 0644,
 163                 .proc_handler   = &proc_dointvec_minmax,
 164                 .strategy       = &sysctl_intvec,
 165                 .extra1         = &min_max_baud_rate,
 166                 .extra2         = &max_max_baud_rate
 167         },
 168         {
 169                 .ctl_name       = NET_IRDA_MIN_TX_TURN_TIME,
 170                 .procname       = "min_tx_turn_time",
 171                 .data           = &sysctl_min_tx_turn_time,
 172                 .maxlen         = sizeof(int),
 173                 .mode           = 0644,
 174                 .proc_handler   = &proc_dointvec_minmax,
 175                 .strategy       = &sysctl_intvec,
 176                 .extra1         = &min_min_tx_turn_time,
 177                 .extra2         = &max_min_tx_turn_time
 178         },
 179         {
 180                 .ctl_name       = NET_IRDA_MAX_TX_DATA_SIZE,
 181                 .procname       = "max_tx_data_size",
 182                 .data           = &sysctl_max_tx_data_size,
 183                 .maxlen         = sizeof(int),
 184                 .mode           = 0644,
 185                 .proc_handler   = &proc_dointvec_minmax,
 186                 .strategy       = &sysctl_intvec,
 187                 .extra1         = &min_max_tx_data_size,
 188                 .extra2         = &max_max_tx_data_size
 189         },
 190         {
 191                 .ctl_name       = NET_IRDA_MAX_TX_WINDOW,
 192                 .procname       = "max_tx_window",
 193                 .data           = &sysctl_max_tx_window,
 194                 .maxlen         = sizeof(int),
 195                 .mode           = 0644,
 196                 .proc_handler   = &proc_dointvec_minmax,
 197                 .strategy       = &sysctl_intvec,
 198                 .extra1         = &min_max_tx_window,
 199                 .extra2         = &max_max_tx_window
 200         },
 201         {
 202                 .ctl_name       = NET_IRDA_MAX_NOREPLY_TIME,
 203                 .procname       = "max_noreply_time",
 204                 .data           = &sysctl_max_noreply_time,
 205                 .maxlen         = sizeof(int),
 206                 .mode           = 0644,
 207                 .proc_handler   = &proc_dointvec_minmax,
 208                 .strategy       = &sysctl_intvec,
 209                 .extra1         = &min_max_noreply_time,
 210                 .extra2         = &max_max_noreply_time
 211         },
 212         {
 213                 .ctl_name       = NET_IRDA_WARN_NOREPLY_TIME,
 214                 .procname       = "warn_noreply_time",
 215                 .data           = &sysctl_warn_noreply_time,
 216                 .maxlen         = sizeof(int),
 217                 .mode           = 0644,
 218                 .proc_handler   = &proc_dointvec_minmax,
 219                 .strategy       = &sysctl_intvec,
 220                 .extra1         = &min_warn_noreply_time,
 221                 .extra2         = &max_warn_noreply_time
 222         },
 223         {
 224                 .ctl_name       = NET_IRDA_LAP_KEEPALIVE_TIME,
 225                 .procname       = "lap_keepalive_time",
 226                 .data           = &sysctl_lap_keepalive_time,
 227                 .maxlen         = sizeof(int),
 228                 .mode           = 0644,
 229                 .proc_handler   = &proc_dointvec_minmax,
 230                 .strategy       = &sysctl_intvec,
 231                 .extra1         = &min_lap_keepalive_time,
 232                 .extra2         = &max_lap_keepalive_time
 233         },
 234         { .ctl_name = 0 }
 235 };
 236
 237 /* One directory */
 238 static ctl_table irda_net_table[] = {
 239         {
 240                 .ctl_name       = NET_IRDA,
 241                 .procname       = "irda",
 242                 .maxlen         = 0,
 243                 .mode           = 0555,
 244                 .child          = irda_table
 245         },
 246         { .ctl_name = 0 }
 247 };
 248
 249 /* The parent directory */
 250 static ctl_table irda_root_table[] = {
 251         {
 252                 .ctl_name       = CTL_NET,
 253                 .procname       = "net",
 254                 .maxlen         = 0,
 255                 .mode           = 0555,
 256                 .child          = irda_net_table
 257         },
 258         { .ctl_name = 0 }
 259 };
 260
 261 static struct ctl_table_header *irda_table_header;
 262
 263 /*
 264  * Function irda_sysctl_register (void)
 265  *
 266  *    Register our sysctl interface
 267  *
 268  */
 269 int __init irda_sysctl_register(void)
 270 {
 271         irda_table_header = register_sysctl_table(irda_root_table);
 272         if (!irda_table_header)
 273                 return -ENOMEM;
 274
 275         return 0;
 276 }
 277
 278 /*
 279  * Function irda_sysctl_unregister (void)
 280  *
 281  *    Unregister our sysctl interface
 282  *
 283  */
 284 void irda_sysctl_unregister(void)
 285 {
 286         unregister_sysctl_table(irda_table_header);
 287 }
 288
 289
 290