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/irias_object.h>
  33
  34 #define NET_IRDA 412 /* Random number */
  35 enum { DISCOVERY=1, DEVNAME, DEBUG, FAST_POLL, DISCOVERY_SLOTS,
  36        DISCOVERY_TIMEOUT, SLOT_TIMEOUT, MAX_BAUD_RATE, MIN_TX_TURN_TIME,
  37        MAX_TX_DATA_SIZE, MAX_TX_WINDOW, MAX_NOREPLY_TIME, WARN_NOREPLY_TIME,
  38        LAP_KEEPALIVE_TIME };
  39
  40 extern int  sysctl_discovery;
  41 extern int  sysctl_discovery_slots;
  42 extern int  sysctl_discovery_timeout;
  43 extern int  sysctl_slot_timeout;
  44 extern int  sysctl_fast_poll_increase;
  45 extern char sysctl_devname[];
  46 extern int  sysctl_max_baud_rate;
  47 extern int  sysctl_min_tx_turn_time;
  48 extern int  sysctl_max_tx_data_size;
  49 extern int  sysctl_max_tx_window;
  50 extern int  sysctl_max_noreply_time;
  51 extern int  sysctl_warn_noreply_time;
  52 extern int  sysctl_lap_keepalive_time;
  53
  54 /* this is needed for the proc_dointvec_minmax - Jean II */
  55 static int max_discovery_slots = 16;            /* ??? */
  56 static int min_discovery_slots = 1;
  57 /* IrLAP 6.13.2 says 25ms to 10+70ms - allow higher since some devices
  58  * seems to require it. (from Dag's comment) */
  59 static int max_slot_timeout = 160;
  60 static int min_slot_timeout = 20;
  61 static int max_max_baud_rate = 16000000;        /* See qos.c - IrLAP spec */
  62 static int min_max_baud_rate = 2400;
  63 static int max_min_tx_turn_time = 10000;        /* See qos.c - IrLAP spec */
  64 static int min_min_tx_turn_time;
  65 static int max_max_tx_data_size = 2048;         /* See qos.c - IrLAP spec */
  66 static int min_max_tx_data_size = 64;
  67 static int max_max_tx_window = 7;               /* See qos.c - IrLAP spec */
  68 static int min_max_tx_window = 1;
  69 static int max_max_noreply_time = 40;           /* See qos.c - IrLAP spec */
  70 static int min_max_noreply_time = 3;
  71 static int max_warn_noreply_time = 3;           /* 3s == standard */
  72 static int min_warn_noreply_time = 1;           /* 1s == min WD_TIMER */
  73 static int max_lap_keepalive_time = 10000;      /* 10s */
  74 static int min_lap_keepalive_time = 100;        /* 100us */
  75 /* For other sysctl, I've no idea of the range. Maybe Dag could help
  76  * us on that - Jean II */
  77
  78 static int do_devname(ctl_table *table, int write, struct file *filp,
  79                       void __user *buffer, size_t *lenp, loff_t *ppos)
  80 {
  81         int ret;
  82
  83         ret = proc_dostring(table, write, filp, buffer, lenp, ppos);
  84         if (ret == 0 && write) {
  85                 struct ias_value *val;
  86
  87                 val = irias_new_string_value(sysctl_devname);
  88                 if (val)
  89                         irias_object_change_attribute("Device", "DeviceName", val);
  90         }
  91         return ret;
  92 }
  93
  94 /* One file */
  95 static ctl_table irda_table[] = {
  96         {
  97                 .ctl_name       = DISCOVERY,
  98                 .procname       = "discovery",
  99                 .data           = &sysctl_discovery,
 100                 .maxlen         = sizeof(int),
 101                 .mode           = 0644,
 102                 .proc_handler   = &proc_dointvec
 103         },
 104         {
 105                 .ctl_name       = DEVNAME,
 106                 .procname       = "devname",
 107                 .data           = sysctl_devname,
 108                 .maxlen         = 65,
 109                 .mode           = 0644,
 110                 .proc_handler   = &do_devname,
 111                 .strategy       = &sysctl_string
 112         },
 113 #ifdef CONFIG_IRDA_DEBUG
 114         {
 115                 .ctl_name       = DEBUG,
 116                 .procname       = "debug",
 117                 .data           = &irda_debug,
 118                 .maxlen         = sizeof(int),
 119                 .mode           = 0644,
 120                 .proc_handler   = &proc_dointvec
 121         },
 122 #endif
 123 #ifdef CONFIG_IRDA_FAST_RR
 124         {
 125                 .ctl_name       = FAST_POLL,
 126                 .procname       = "fast_poll_increase",
 127                 .data           = &sysctl_fast_poll_increase,
 128                 .maxlen         = sizeof(int),
 129                 .mode           = 0644,
 130                 .proc_handler   = &proc_dointvec
 131         },
 132 #endif
 133         {
 134                 .ctl_name       = DISCOVERY_SLOTS,
 135                 .procname       = "discovery_slots",
 136                 .data           = &sysctl_discovery_slots,
 137                 .maxlen         = sizeof(int),
 138                 .mode           = 0644,
 139                 .proc_handler   = &proc_dointvec_minmax,
 140                 .strategy       = &sysctl_intvec,
 141                 .extra1         = &min_discovery_slots,
 142                 .extra2         = &max_discovery_slots
 143         },
 144         {
 145                 .ctl_name       = DISCOVERY_TIMEOUT,
 146                 .procname       = "discovery_timeout",
 147                 .data           = &sysctl_discovery_timeout,
 148                 .maxlen         = sizeof(int),
 149                 .mode           = 0644,
 150                 .proc_handler   = &proc_dointvec
 151         },
 152         {
 153                 .ctl_name       = SLOT_TIMEOUT,
 154                 .procname       = "slot_timeout",
 155                 .data           = &sysctl_slot_timeout,
 156                 .maxlen         = sizeof(int),
 157                 .mode           = 0644,
 158                 .proc_handler   = &proc_dointvec_minmax,
 159                 .strategy       = &sysctl_intvec,
 160                 .extra1         = &min_slot_timeout,
 161                 .extra2         = &max_slot_timeout
 162         },
 163         {
 164                 .ctl_name       = MAX_BAUD_RATE,
 165                 .procname       = "max_baud_rate",
 166                 .data           = &sysctl_max_baud_rate,
 167                 .maxlen         = sizeof(int),
 168                 .mode           = 0644,
 169                 .proc_handler   = &proc_dointvec_minmax,
 170                 .strategy       = &sysctl_intvec,
 171                 .extra1         = &min_max_baud_rate,
 172                 .extra2         = &max_max_baud_rate
 173         },
 174         {
 175                 .ctl_name       = MIN_TX_TURN_TIME,
 176                 .procname       = "min_tx_turn_time",
 177                 .data           = &sysctl_min_tx_turn_time,
 178                 .maxlen         = sizeof(int),
 179                 .mode           = 0644,
 180                 .proc_handler   = &proc_dointvec_minmax,
 181                 .strategy       = &sysctl_intvec,
 182                 .extra1         = &min_min_tx_turn_time,
 183                 .extra2         = &max_min_tx_turn_time
 184         },
 185         {
 186                 .ctl_name       = MAX_TX_DATA_SIZE,
 187                 .procname       = "max_tx_data_size",
 188                 .data           = &sysctl_max_tx_data_size,
 189                 .maxlen         = sizeof(int),
 190                 .mode           = 0644,
 191                 .proc_handler   = &proc_dointvec_minmax,
 192                 .strategy       = &sysctl_intvec,
 193                 .extra1         = &min_max_tx_data_size,
 194                 .extra2         = &max_max_tx_data_size
 195         },
 196         {
 197                 .ctl_name       = MAX_TX_WINDOW,
 198                 .procname       = "max_tx_window",
 199                 .data           = &sysctl_max_tx_window,
 200                 .maxlen         = sizeof(int),
 201                 .mode           = 0644,
 202                 .proc_handler   = &proc_dointvec_minmax,
 203                 .strategy       = &sysctl_intvec,
 204                 .extra1         = &min_max_tx_window,
 205                 .extra2         = &max_max_tx_window
 206         },
 207         {
 208                 .ctl_name       = MAX_NOREPLY_TIME,
 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                 .strategy       = &sysctl_intvec,
 215                 .extra1         = &min_max_noreply_time,
 216                 .extra2         = &max_max_noreply_time
 217         },
 218         {
 219                 .ctl_name       = WARN_NOREPLY_TIME,
 220                 .procname       = "warn_noreply_time",
 221                 .data           = &sysctl_warn_noreply_time,
 222                 .maxlen         = sizeof(int),
 223                 .mode           = 0644,
 224                 .proc_handler   = &proc_dointvec_minmax,
 225                 .strategy       = &sysctl_intvec,
 226                 .extra1         = &min_warn_noreply_time,
 227                 .extra2         = &max_warn_noreply_time
 228         },
 229         {
 230                 .ctl_name       = LAP_KEEPALIVE_TIME,
 231                 .procname       = "lap_keepalive_time",
 232                 .data           = &sysctl_lap_keepalive_time,
 233                 .maxlen         = sizeof(int),
 234                 .mode           = 0644,
 235                 .proc_handler   = &proc_dointvec_minmax,
 236                 .strategy       = &sysctl_intvec,
 237                 .extra1         = &min_lap_keepalive_time,
 238                 .extra2         = &max_lap_keepalive_time
 239         },
 240         { .ctl_name = 0 }
 241 };
 242
 243 /* One directory */
 244 static ctl_table irda_net_table[] = {
 245         {
 246                 .ctl_name       = NET_IRDA,
 247                 .procname       = "irda",
 248                 .maxlen         = 0,
 249                 .mode           = 0555,
 250                 .child          = irda_table
 251         },
 252         { .ctl_name = 0 }
 253 };
 254
 255 /* The parent directory */
 256 static ctl_table irda_root_table[] = {
 257         {
 258                 .ctl_name       = CTL_NET,
 259                 .procname       = "net",
 260                 .maxlen         = 0,
 261                 .mode           = 0555,
 262                 .child          = irda_net_table
 263         },
 264         { .ctl_name = 0 }
 265 };
 266
 267 static struct ctl_table_header *irda_table_header;
 268
 269 /*
 270  * Function irda_sysctl_register (void)
 271  *
 272  *    Register our sysctl interface
 273  *
 274  */
 275 int __init irda_sysctl_register(void)
 276 {
 277         irda_table_header = register_sysctl_table(irda_root_table);
 278         if (!irda_table_header)
 279                 return -ENOMEM;
 280
 281         return 0;
 282 }
 283
 284 /*
 285  * Function irda_sysctl_unregister (void)
 286  *
 287  *    Unregister our sysctl interface
 288  *
 289  */
 290 void __exit irda_sysctl_unregister(void)
 291 {
 292         unregister_sysctl_table(irda_table_header);
 293 }
 294
 295
 296