kernel/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/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 unsigned int sysctl_min_tx_turn_time;
  44 extern unsigned int sysctl_max_tx_data_size;
  45 extern unsigned 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(struct ctl_table *table, int write,
  77                       void __user *buffer, size_t *lenp, loff_t *ppos)
  78 {
  79         int ret;
  80
  81         ret = proc_dostring(table, write, 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(struct ctl_table *table, int write,
  94                     void __user *buffer, size_t *lenp, loff_t *ppos)
  95 {
  96        int ret;
  97
  98        ret = proc_dointvec(table, write, 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 struct ctl_table irda_table[] = {
 115         {
 116                 .procname       = "discovery",
 117                 .data           = &sysctl_discovery,
 118                 .maxlen         = sizeof(int),
 119                 .mode           = 0644,
 120                 .proc_handler   = do_discovery,
 121         },
 122         {
 123                 .procname       = "devname",
 124                 .data           = sysctl_devname,
 125                 .maxlen         = 65,
 126                 .mode           = 0644,
 127                 .proc_handler   = do_devname,
 128         },
 129 #ifdef CONFIG_IRDA_FAST_RR
 130         {
 131                 .procname       = "fast_poll_increase",
 132                 .data           = &sysctl_fast_poll_increase,
 133                 .maxlen         = sizeof(int),
 134                 .mode           = 0644,
 135                 .proc_handler   = proc_dointvec
 136         },
 137 #endif
 138         {
 139                 .procname       = "discovery_slots",
 140                 .data           = &sysctl_discovery_slots,
 141                 .maxlen         = sizeof(int),
 142                 .mode           = 0644,
 143                 .proc_handler   = proc_dointvec_minmax,
 144                 .extra1         = &min_discovery_slots,
 145                 .extra2         = &max_discovery_slots
 146         },
 147         {
 148                 .procname       = "discovery_timeout",
 149                 .data           = &sysctl_discovery_timeout,
 150                 .maxlen         = sizeof(int),
 151                 .mode           = 0644,
 152                 .proc_handler   = proc_dointvec
 153         },
 154         {
 155                 .procname       = "slot_timeout",
 156                 .data           = &sysctl_slot_timeout,
 157                 .maxlen         = sizeof(int),
 158                 .mode           = 0644,
 159                 .proc_handler   = proc_dointvec_minmax,
 160                 .extra1         = &min_slot_timeout,
 161                 .extra2         = &max_slot_timeout
 162         },
 163         {
 164                 .procname       = "max_baud_rate",
 165                 .data           = &sysctl_max_baud_rate,
 166                 .maxlen         = sizeof(int),
 167                 .mode           = 0644,
 168                 .proc_handler   = proc_dointvec_minmax,
 169                 .extra1         = &min_max_baud_rate,
 170                 .extra2         = &max_max_baud_rate
 171         },
 172         {
 173                 .procname       = "min_tx_turn_time",
 174                 .data           = &sysctl_min_tx_turn_time,
 175                 .maxlen         = sizeof(int),
 176                 .mode           = 0644,
 177                 .proc_handler   = proc_dointvec_minmax,
 178                 .extra1         = &min_min_tx_turn_time,
 179                 .extra2         = &max_min_tx_turn_time
 180         },
 181         {
 182                 .procname       = "max_tx_data_size",
 183                 .data           = &sysctl_max_tx_data_size,
 184                 .maxlen         = sizeof(int),
 185                 .mode           = 0644,
 186                 .proc_handler   = proc_dointvec_minmax,
 187                 .extra1         = &min_max_tx_data_size,
 188                 .extra2         = &max_max_tx_data_size
 189         },
 190         {
 191                 .procname       = "max_tx_window",
 192                 .data           = &sysctl_max_tx_window,
 193                 .maxlen         = sizeof(int),
 194                 .mode           = 0644,
 195                 .proc_handler   = proc_dointvec_minmax,
 196                 .extra1         = &min_max_tx_window,
 197                 .extra2         = &max_max_tx_window
 198         },
 199         {
 200                 .procname       = "max_noreply_time",
 201                 .data           = &sysctl_max_noreply_time,
 202                 .maxlen         = sizeof(int),
 203                 .mode           = 0644,
 204                 .proc_handler   = proc_dointvec_minmax,
 205                 .extra1         = &min_max_noreply_time,
 206                 .extra2         = &max_max_noreply_time
 207         },
 208         {
 209                 .procname       = "warn_noreply_time",
 210                 .data           = &sysctl_warn_noreply_time,
 211                 .maxlen         = sizeof(int),
 212                 .mode           = 0644,
 213                 .proc_handler   = proc_dointvec_minmax,
 214                 .extra1         = &min_warn_noreply_time,
 215                 .extra2         = &max_warn_noreply_time
 216         },
 217         {
 218                 .procname       = "lap_keepalive_time",
 219                 .data           = &sysctl_lap_keepalive_time,
 220                 .maxlen         = sizeof(int),
 221                 .mode           = 0644,
 222                 .proc_handler   = proc_dointvec_minmax,
 223                 .extra1         = &min_lap_keepalive_time,
 224                 .extra2         = &max_lap_keepalive_time
 225         },
 226         { }
 227 };
 228
 229 static struct ctl_table_header *irda_table_header;
 230
 231 /*
 232  * Function irda_sysctl_register (void)
 233  *
 234  *    Register our sysctl interface
 235  *
 236  */
 237 int __init irda_sysctl_register(void)
 238 {
 239         irda_table_header = register_net_sysctl(&init_net, "net/irda", irda_table);
 240         if (!irda_table_header)
 241                 return -ENOMEM;
 242
 243         return 0;
 244 }
 245
 246 /*
 247  * Function irda_sysctl_unregister (void)
 248  *
 249  *    Unregister our sysctl interface
 250  *
 251  */
 252 void irda_sysctl_unregister(void)
 253 {
 254         unregister_net_sysctl_table(irda_table_header);
 255 }
 256
 257
 258