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 extern char sysctl_devname[];
  47 extern int  sysctl_max_baud_rate;
  48 extern int  sysctl_min_tx_turn_time;
  49 extern int  sysctl_max_tx_data_size;
  50 extern int  sysctl_max_tx_window;
  51 extern int  sysctl_max_noreply_time;
  52 extern int  sysctl_warn_noreply_time;
  53 extern int  sysctl_lap_keepalive_time;
  54
  55 /* this is needed for the proc_dointvec_minmax - Jean II */
  56 static int max_discovery_slots = 16;            /* ??? */
  57 static int min_discovery_slots = 1;
  58 /* IrLAP 6.13.2 says 25ms to 10+70ms - allow higher since some devices
  59  * seems to require it. (from Dag's comment) */
  60 static int max_slot_timeout = 160;
  61 static int min_slot_timeout = 20;
  62 static int max_max_baud_rate = 16000000;        /* See qos.c - IrLAP spec */
  63 static int min_max_baud_rate = 2400;
  64 static int max_min_tx_turn_time = 10000;        /* See qos.c - IrLAP spec */
  65 static int min_min_tx_turn_time;
  66 static int max_max_tx_data_size = 2048;         /* See qos.c - IrLAP spec */
  67 static int min_max_tx_data_size = 64;
  68 static int max_max_tx_window = 7;               /* See qos.c - IrLAP spec */
  69 static int min_max_tx_window = 1;
  70 static int max_max_noreply_time = 40;           /* See qos.c - IrLAP spec */
  71 static int min_max_noreply_time = 3;
  72 static int max_warn_noreply_time = 3;           /* 3s == standard */
  73 static int min_warn_noreply_time = 1;           /* 1s == min WD_TIMER */
  74 static int max_lap_keepalive_time = 10000;      /* 10s */
  75 static int min_lap_keepalive_time = 100;        /* 100us */
  76 /* For other sysctl, I've no idea of the range. Maybe Dag could help
  77  * us on that - Jean II */
  78
  79 static int do_devname(ctl_table *table, int write, struct file *filp,
  80                       void __user *buffer, size_t *lenp, loff_t *ppos)
  81 {
  82         int ret;
  83
  84         ret = proc_dostring(table, write, filp, buffer, lenp, ppos);
  85         if (ret == 0 && write) {
  86                 struct ias_value *val;
  87
  88                 val = irias_new_string_value(sysctl_devname);
  89                 if (val)
  90                         irias_object_change_attribute("Device", "DeviceName", val);
  91         }
  92         return ret;
  93 }
  94
  95 /* One file */
  96 static ctl_table irda_table[] = {
  97         {
  98                 .ctl_name       = DISCOVERY,
  99                 .procname       = "discovery",
 100                 .data           = &sysctl_discovery,
 101                 .maxlen         = sizeof(int),
 102                 .mode           = 0644,
 103                 .proc_handler   = &proc_dointvec
 104         },
 105         {
 106                 .ctl_name       = DEVNAME,
 107                 .procname       = "devname",
 108                 .data           = sysctl_devname,
 109                 .maxlen         = 65,
 110                 .mode           = 0644,
 111                 .proc_handler   = &do_devname,
 112                 .strategy       = &sysctl_string
 113         },
 114 #ifdef CONFIG_IRDA_DEBUG
 115         {
 116                 .ctl_name       = DEBUG,
 117                 .procname       = "debug",
 118                 .data           = &irda_debug,
 119                 .maxlen         = sizeof(int),
 120                 .mode           = 0644,
 121                 .proc_handler   = &proc_dointvec
 122         },
 123 #endif
 124 #ifdef CONFIG_IRDA_FAST_RR
 125         {
 126                 .ctl_name       = FAST_POLL,
 127                 .procname       = "fast_poll_increase",
 128                 .data           = &sysctl_fast_poll_increase,
 129                 .maxlen         = sizeof(int),
 130                 .mode           = 0644,
 131                 .proc_handler   = &proc_dointvec
 132         },
 133 #endif
 134         {
 135                 .ctl_name       = DISCOVERY_SLOTS,
 136                 .procname       = "discovery_slots",
 137                 .data           = &sysctl_discovery_slots,
 138                 .maxlen         = sizeof(int),
 139                 .mode           = 0644,
 140                 .proc_handler   = &proc_dointvec_minmax,
 141                 .strategy       = &sysctl_intvec,
 142                 .extra1         = &min_discovery_slots,
 143                 .extra2         = &max_discovery_slots
 144         },
 145         {
 146                 .ctl_name       = DISCOVERY_TIMEOUT,
 147                 .procname       = "discovery_timeout",
 148                 .data           = &sysctl_discovery_timeout,
 149                 .maxlen         = sizeof(int),
 150                 .mode           = 0644,
 151                 .proc_handler   = &proc_dointvec
 152         },
 153         {
 154                 .ctl_name       = SLOT_TIMEOUT,
 155                 .procname       = "slot_timeout",
 156                 .data           = &sysctl_slot_timeout,
 157                 .maxlen         = sizeof(int),
 158                 .mode           = 0644,
 159                 .proc_handler   = &proc_dointvec_minmax,
 160                 .strategy       = &sysctl_intvec,
 161                 .extra1         = &min_slot_timeout,
 162                 .extra2         = &max_slot_timeout
 163         },
 164         {
 165                 .ctl_name       = MAX_BAUD_RATE,
 166                 .procname       = "max_baud_rate",
 167                 .data           = &sysctl_max_baud_rate,
 168                 .maxlen         = sizeof(int),
 169                 .mode           = 0644,
 170                 .proc_handler   = &proc_dointvec_minmax,
 171                 .strategy       = &sysctl_intvec,
 172                 .extra1         = &min_max_baud_rate,
 173                 .extra2         = &max_max_baud_rate
 174         },
 175         {
 176                 .ctl_name       = MIN_TX_TURN_TIME,
 177                 .procname       = "min_tx_turn_time",
 178                 .data           = &sysctl_min_tx_turn_time,
 179                 .maxlen         = sizeof(int),
 180                 .mode           = 0644,
 181                 .proc_handler   = &proc_dointvec_minmax,
 182                 .strategy       = &sysctl_intvec,
 183                 .extra1         = &min_min_tx_turn_time,
 184                 .extra2         = &max_min_tx_turn_time
 185         },
 186         {
 187                 .ctl_name       = MAX_TX_DATA_SIZE,
 188                 .procname       = "max_tx_data_size",
 189                 .data           = &sysctl_max_tx_data_size,
 190                 .maxlen         = sizeof(int),
 191                 .mode           = 0644,
 192                 .proc_handler   = &proc_dointvec_minmax,
 193                 .strategy       = &sysctl_intvec,
 194                 .extra1         = &min_max_tx_data_size,
 195                 .extra2         = &max_max_tx_data_size
 196         },
 197         {
 198                 .ctl_name       = MAX_TX_WINDOW,
 199                 .procname       = "max_tx_window",
 200                 .data           = &sysctl_max_tx_window,
 201                 .maxlen         = sizeof(int),
 202                 .mode           = 0644,
 203                 .proc_handler   = &proc_dointvec_minmax,
 204                 .strategy       = &sysctl_intvec,
 205                 .extra1         = &min_max_tx_window,
 206                 .extra2         = &max_max_tx_window
 207         },
 208         {
 209                 .ctl_name       = MAX_NOREPLY_TIME,
 210                 .procname       = "max_noreply_time",
 211                 .data           = &sysctl_max_noreply_time,
 212                 .maxlen         = sizeof(int),
 213                 .mode           = 0644,
 214                 .proc_handler   = &proc_dointvec_minmax,
 215                 .strategy       = &sysctl_intvec,
 216                 .extra1         = &min_max_noreply_time,
 217                 .extra2         = &max_max_noreply_time
 218         },
 219         {
 220                 .ctl_name       = WARN_NOREPLY_TIME,
 221                 .procname       = "warn_noreply_time",
 222                 .data           = &sysctl_warn_noreply_time,
 223                 .maxlen         = sizeof(int),
 224                 .mode           = 0644,
 225                 .proc_handler   = &proc_dointvec_minmax,
 226                 .strategy       = &sysctl_intvec,
 227                 .extra1         = &min_warn_noreply_time,
 228                 .extra2         = &max_warn_noreply_time
 229         },
 230         {
 231                 .ctl_name       = LAP_KEEPALIVE_TIME,
 232                 .procname       = "lap_keepalive_time",
 233                 .data           = &sysctl_lap_keepalive_time,
 234                 .maxlen         = sizeof(int),
 235                 .mode           = 0644,
 236                 .proc_handler   = &proc_dointvec_minmax,
 237                 .strategy       = &sysctl_intvec,
 238                 .extra1         = &min_lap_keepalive_time,
 239                 .extra2         = &max_lap_keepalive_time
 240         },
 241         { .ctl_name = 0 }
 242 };
 243
 244 /* One directory */
 245 static ctl_table irda_net_table[] = {
 246         {
 247                 .ctl_name       = NET_IRDA,
 248                 .procname       = "irda",
 249                 .maxlen         = 0,
 250                 .mode           = 0555,
 251                 .child          = irda_table
 252         },
 253         { .ctl_name = 0 }
 254 };
 255
 256 /* The parent directory */
 257 static ctl_table irda_root_table[] = {
 258         {
 259                 .ctl_name       = CTL_NET,
 260                 .procname       = "net",
 261                 .maxlen         = 0,
 262                 .mode           = 0555,
 263                 .child          = irda_net_table
 264         },
 265         { .ctl_name = 0 }
 266 };
 267
 268 static struct ctl_table_header *irda_table_header;
 269
 270 /*
 271  * Function irda_sysctl_register (void)
 272  *
 273  *    Register our sysctl interface
 274  *
 275  */
 276 int __init irda_sysctl_register(void)
 277 {
 278         irda_table_header = register_sysctl_table(irda_root_table, 0);
 279         if (!irda_table_header)
 280                 return -ENOMEM;
 281
 282         return 0;
 283 }
 284
 285 /*
 286  * Function irda_sysctl_unregister (void)
 287  *
 288  *    Unregister our sysctl interface
 289  *
 290  */
 291 void __exit irda_sysctl_unregister(void)
 292 {
 293         unregister_sysctl_table(irda_table_header);
 294 }
 295
 296
 297