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/config.h>
  27 #include <linux/mm.h>
  28 #include <linux/ctype.h>
  29 #include <linux/sysctl.h>
  30 #include <linux/init.h>
  31
  32 #include <net/irda/irda.h>              /* irda_debug */
  33 #include <net/irda/irias_object.h>
  34
  35 #define NET_IRDA 412 /* Random number */
  36 enum { DISCOVERY=1, DEVNAME, DEBUG, FAST_POLL, DISCOVERY_SLOTS,
  37        DISCOVERY_TIMEOUT, SLOT_TIMEOUT, MAX_BAUD_RATE, MIN_TX_TURN_TIME,
  38        MAX_TX_DATA_SIZE, MAX_TX_WINDOW, MAX_NOREPLY_TIME, WARN_NOREPLY_TIME,
  39        LAP_KEEPALIVE_TIME };
  40
  41 extern int  sysctl_discovery;
  42 extern int  sysctl_discovery_slots;
  43 extern int  sysctl_discovery_timeout;
  44 extern int  sysctl_slot_timeout;
  45 extern int  sysctl_fast_poll_increase;
  46 int         sysctl_compression = 0;
  47 extern char sysctl_devname[];
  48 extern int  sysctl_max_baud_rate;
  49 extern int  sysctl_min_tx_turn_time;
  50 extern int  sysctl_max_tx_data_size;
  51 extern int  sysctl_max_tx_window;
  52 extern int  sysctl_max_noreply_time;
  53 extern int  sysctl_warn_noreply_time;
  54 extern int  sysctl_lap_keepalive_time;
  55
  56 /* this is needed for the proc_dointvec_minmax - Jean II */
  57 static int max_discovery_slots = 16;            /* ??? */
  58 static int min_discovery_slots = 1;
  59 /* IrLAP 6.13.2 says 25ms to 10+70ms - allow higher since some devices
  60  * seems to require it. (from Dag's comment) */
  61 static int max_slot_timeout = 160;
  62 static int min_slot_timeout = 20;
  63 static int max_max_baud_rate = 16000000;        /* See qos.c - IrLAP spec */
  64 static int min_max_baud_rate = 2400;
  65 static int max_min_tx_turn_time = 10000;        /* See qos.c - IrLAP spec */
  66 static int min_min_tx_turn_time;
  67 static int max_max_tx_data_size = 2048;         /* See qos.c - IrLAP spec */
  68 static int min_max_tx_data_size = 64;
  69 static int max_max_tx_window = 7;               /* See qos.c - IrLAP spec */
  70 static int min_max_tx_window = 1;
  71 static int max_max_noreply_time = 40;           /* See qos.c - IrLAP spec */
  72 static int min_max_noreply_time = 3;
  73 static int max_warn_noreply_time = 3;           /* 3s == standard */
  74 static int min_warn_noreply_time = 1;           /* 1s == min WD_TIMER */
  75 static int max_lap_keepalive_time = 10000;      /* 10s */
  76 static int min_lap_keepalive_time = 100;        /* 100us */
  77 /* For other sysctl, I've no idea of the range. Maybe Dag could help
  78  * us on that - Jean II */
  79
  80 static int do_devname(ctl_table *table, int write, struct file *filp,
  81                       void __user *buffer, size_t *lenp)
  82 {
  83         int ret;
  84
  85         ret = proc_dostring(table, write, filp, buffer, lenp);
  86         if (ret == 0 && write) {
  87                 struct ias_value *val;
  88
  89                 val = irias_new_string_value(sysctl_devname);
  90                 if (val)
  91                         irias_object_change_attribute("Device", "DeviceName", val);
  92         }
  93         return ret;
  94 }
  95
  96 /* One file */
  97 static ctl_table irda_table[] = {
  98         {
  99                 .ctl_name       = DISCOVERY,
 100                 .procname       = "discovery",
 101                 .data           = &sysctl_discovery,
 102                 .maxlen         = sizeof(int),
 103                 .mode           = 0644,
 104                 .proc_handler   = &proc_dointvec
 105         },
 106         {
 107                 .ctl_name       = DEVNAME,
 108                 .procname       = "devname",
 109                 .data           = sysctl_devname,
 110                 .maxlen         = 65,
 111                 .mode           = 0644,
 112                 .proc_handler   = &do_devname,
 113                 .strategy       = &sysctl_string
 114         },
 115 #ifdef CONFIG_IRDA_DEBUG
 116         {
 117                 .ctl_name       = DEBUG,
 118                 .procname       = "debug",
 119                 .data           = &irda_debug,
 120                 .maxlen         = sizeof(int),
 121                 .mode           = 0644,
 122                 .proc_handler   = &proc_dointvec
 123         },
 124 #endif
 125 #ifdef CONFIG_IRDA_FAST_RR
 126         {
 127                 .ctl_name       = FAST_POLL,
 128                 .procname       = "fast_poll_increase",
 129                 .data           = &sysctl_fast_poll_increase,
 130                 .maxlen         = sizeof(int),
 131                 .mode           = 0644,
 132                 .proc_handler   = &proc_dointvec
 133         },
 134 #endif
 135         {
 136                 .ctl_name       = DISCOVERY_SLOTS,
 137                 .procname       = "discovery_slots",
 138                 .data           = &sysctl_discovery_slots,
 139                 .maxlen         = sizeof(int),
 140                 .mode           = 0644,
 141                 .proc_handler   = &proc_dointvec_minmax,
 142                 .strategy       = &sysctl_intvec,
 143                 .extra1         = &min_discovery_slots,
 144                 .extra2         = &max_discovery_slots
 145         },
 146         {
 147                 .ctl_name       = DISCOVERY_TIMEOUT,
 148                 .procname       = "discovery_timeout",
 149                 .data           = &sysctl_discovery_timeout,
 150                 .maxlen         = sizeof(int),
 151                 .mode           = 0644,
 152                 .proc_handler   = &proc_dointvec
 153         },
 154         {
 155                 .ctl_name       = SLOT_TIMEOUT,
 156                 .procname       = "slot_timeout",
 157                 .data           = &sysctl_slot_timeout,
 158                 .maxlen         = sizeof(int),
 159                 .mode           = 0644,
 160                 .proc_handler   = &proc_dointvec_minmax,
 161                 .strategy       = &sysctl_intvec,
 162                 .extra1         = &min_slot_timeout,
 163                 .extra2         = &max_slot_timeout
 164         },
 165         {
 166                 .ctl_name       = MAX_BAUD_RATE,
 167                 .procname       = "max_baud_rate",
 168                 .data           = &sysctl_max_baud_rate,
 169                 .maxlen         = sizeof(int),
 170                 .mode           = 0644,
 171                 .proc_handler   = &proc_dointvec_minmax,
 172                 .strategy       = &sysctl_intvec,
 173                 .extra1         = &min_max_baud_rate,
 174                 .extra2         = &max_max_baud_rate
 175         },
 176         {
 177                 .ctl_name       = MIN_TX_TURN_TIME,
 178                 .procname       = "min_tx_turn_time",
 179                 .data           = &sysctl_min_tx_turn_time,
 180                 .maxlen         = sizeof(int),
 181                 .mode           = 0644,
 182                 .proc_handler   = &proc_dointvec_minmax,
 183                 .strategy       = &sysctl_intvec,
 184                 .extra1         = &min_min_tx_turn_time,
 185                 .extra2         = &max_min_tx_turn_time
 186         },
 187         {
 188                 .ctl_name       = MAX_TX_DATA_SIZE,
 189                 .procname       = "max_tx_data_size",
 190                 .data           = &sysctl_max_tx_data_size,
 191                 .maxlen         = sizeof(int),
 192                 .mode           = 0644,
 193                 .proc_handler   = &proc_dointvec_minmax,
 194                 .strategy       = &sysctl_intvec,
 195                 .extra1         = &min_max_tx_data_size,
 196                 .extra2         = &max_max_tx_data_size
 197         },
 198         {
 199                 .ctl_name       = MAX_TX_WINDOW,
 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                 .strategy       = &sysctl_intvec,
 206                 .extra1         = &min_max_tx_window,
 207                 .extra2         = &max_max_tx_window
 208         },
 209         {
 210                 .ctl_name       = MAX_NOREPLY_TIME,
 211                 .procname       = "max_noreply_time",
 212                 .data           = &sysctl_max_noreply_time,
 213                 .maxlen         = sizeof(int),
 214                 .mode           = 0644,
 215                 .proc_handler   = &proc_dointvec_minmax,
 216                 .strategy       = &sysctl_intvec,
 217                 .extra1         = &min_max_noreply_time,
 218                 .extra2         = &max_max_noreply_time
 219         },
 220         {
 221                 .ctl_name       = WARN_NOREPLY_TIME,
 222                 .procname       = "warn_noreply_time",
 223                 .data           = &sysctl_warn_noreply_time,
 224                 .maxlen         = sizeof(int),
 225                 .mode           = 0644,
 226                 .proc_handler   = &proc_dointvec_minmax,
 227                 .strategy       = &sysctl_intvec,
 228                 .extra1         = &min_warn_noreply_time,
 229                 .extra2         = &max_warn_noreply_time
 230         },
 231         {
 232                 .ctl_name       = LAP_KEEPALIVE_TIME,
 233                 .procname       = "lap_keepalive_time",
 234                 .data           = &sysctl_lap_keepalive_time,
 235                 .maxlen         = sizeof(int),
 236                 .mode           = 0644,
 237                 .proc_handler   = &proc_dointvec_minmax,
 238                 .strategy       = &sysctl_intvec,
 239                 .extra1         = &min_lap_keepalive_time,
 240                 .extra2         = &max_lap_keepalive_time
 241         },
 242         { .ctl_name = 0 }
 243 };
 244
 245 /* One directory */
 246 static ctl_table irda_net_table[] = {
 247         {
 248                 .ctl_name       = NET_IRDA,
 249                 .procname       = "irda",
 250                 .maxlen         = 0,
 251                 .mode           = 0555,
 252                 .child          = irda_table
 253         },
 254         { .ctl_name = 0 }
 255 };
 256
 257 /* The parent directory */
 258 static ctl_table irda_root_table[] = {
 259         {
 260                 .ctl_name       = CTL_NET,
 261                 .procname       = "net",
 262                 .maxlen         = 0,
 263                 .mode           = 0555,
 264                 .child          = irda_net_table
 265         },
 266         { .ctl_name = 0 }
 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_table(irda_root_table, 0);
 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 __exit irda_sysctl_unregister(void)
 293 {
 294         unregister_sysctl_table(irda_table_header);
 295 }
 296
 297
 298