net/ax25/sysctl_net_ax25.c

   1 /*
   2  * This program is free software; you can redistribute it and/or modify
   3  * it under the terms of the GNU General Public License as published by
   4  * the Free Software Foundation; either version 2 of the License, or
   5  * (at your option) any later version.
   6  *
   7  * Copyright (C) 1996 Mike Shaver (shaver@zeroknowledge.com)
   8  */
   9 #include <linux/mm.h>
  10 #include <linux/slab.h>
  11 #include <linux/sysctl.h>
  12 #include <linux/spinlock.h>
  13 #include <net/ax25.h>
  14
  15 static int min_ipdefmode[1],            max_ipdefmode[] = {1};
  16 static int min_axdefmode[1],            max_axdefmode[] = {1};
  17 static int min_backoff[1],              max_backoff[] = {2};
  18 static int min_conmode[1],              max_conmode[] = {2};
  19 static int min_window[] = {1},          max_window[] = {7};
  20 static int min_ewindow[] = {1},         max_ewindow[] = {63};
  21 static int min_t1[] = {1},              max_t1[] = {30000};
  22 static int min_t2[] = {1},              max_t2[] = {20000};
  23 static int min_t3[1],                   max_t3[] = {3600000};
  24 static int min_idle[1],                 max_idle[] = {65535000};
  25 static int min_n2[] = {1},              max_n2[] = {31};
  26 static int min_paclen[] = {1},          max_paclen[] = {512};
  27 static int min_proto[1],                max_proto[] = { AX25_PROTO_MAX };
  28 #ifdef CONFIG_AX25_DAMA_SLAVE
  29 static int min_ds_timeout[1],           max_ds_timeout[] = {65535000};
  30 #endif
  31
  32 static struct ctl_table_header *ax25_table_header;
  33
  34 static ctl_table *ax25_table;
  35 static int ax25_table_size;
  36
  37 static struct ctl_path ax25_path[] = {
  38         { .procname = "net", },
  39         { .procname = "ax25", },
  40         { }
  41 };
  42
  43 static const ctl_table ax25_param_table[] = {
  44         {
  45                 .procname       = "ip_default_mode",
  46                 .maxlen         = sizeof(int),
  47                 .mode           = 0644,
  48                 .proc_handler   = proc_dointvec_minmax,
  49                 .extra1         = &min_ipdefmode,
  50                 .extra2         = &max_ipdefmode
  51         },
  52         {
  53                 .procname       = "ax25_default_mode",
  54                 .maxlen         = sizeof(int),
  55                 .mode           = 0644,
  56                 .proc_handler   = proc_dointvec_minmax,
  57                 .extra1         = &min_axdefmode,
  58                 .extra2         = &max_axdefmode
  59         },
  60         {
  61                 .procname       = "backoff_type",
  62                 .maxlen         = sizeof(int),
  63                 .mode           = 0644,
  64                 .proc_handler   = proc_dointvec_minmax,
  65                 .extra1         = &min_backoff,
  66                 .extra2         = &max_backoff
  67         },
  68         {
  69                 .procname       = "connect_mode",
  70                 .maxlen         = sizeof(int),
  71                 .mode           = 0644,
  72                 .proc_handler   = proc_dointvec_minmax,
  73                 .extra1         = &min_conmode,
  74                 .extra2         = &max_conmode
  75         },
  76         {
  77                 .procname       = "standard_window_size",
  78                 .maxlen         = sizeof(int),
  79                 .mode           = 0644,
  80                 .proc_handler   = proc_dointvec_minmax,
  81                 .extra1         = &min_window,
  82                 .extra2         = &max_window
  83         },
  84         {
  85                 .procname       = "extended_window_size",
  86                 .maxlen         = sizeof(int),
  87                 .mode           = 0644,
  88                 .proc_handler   = proc_dointvec_minmax,
  89                 .extra1         = &min_ewindow,
  90                 .extra2         = &max_ewindow
  91         },
  92         {
  93                 .procname       = "t1_timeout",
  94                 .maxlen         = sizeof(int),
  95                 .mode           = 0644,
  96                 .proc_handler   = proc_dointvec_minmax,
  97                 .extra1         = &min_t1,
  98                 .extra2         = &max_t1
  99         },
 100         {
 101                 .procname       = "t2_timeout",
 102                 .maxlen         = sizeof(int),
 103                 .mode           = 0644,
 104                 .proc_handler   = proc_dointvec_minmax,
 105                 .extra1         = &min_t2,
 106                 .extra2         = &max_t2
 107         },
 108         {
 109                 .procname       = "t3_timeout",
 110                 .maxlen         = sizeof(int),
 111                 .mode           = 0644,
 112                 .proc_handler   = proc_dointvec_minmax,
 113                 .extra1         = &min_t3,
 114                 .extra2         = &max_t3
 115         },
 116         {
 117                 .procname       = "idle_timeout",
 118                 .maxlen         = sizeof(int),
 119                 .mode           = 0644,
 120                 .proc_handler   = proc_dointvec_minmax,
 121                 .extra1         = &min_idle,
 122                 .extra2         = &max_idle
 123         },
 124         {
 125                 .procname       = "maximum_retry_count",
 126                 .maxlen         = sizeof(int),
 127                 .mode           = 0644,
 128                 .proc_handler   = proc_dointvec_minmax,
 129                 .extra1         = &min_n2,
 130                 .extra2         = &max_n2
 131         },
 132         {
 133                 .procname       = "maximum_packet_length",
 134                 .maxlen         = sizeof(int),
 135                 .mode           = 0644,
 136                 .proc_handler   = proc_dointvec_minmax,
 137                 .extra1         = &min_paclen,
 138                 .extra2         = &max_paclen
 139         },
 140         {
 141                 .procname       = "protocol",
 142                 .maxlen         = sizeof(int),
 143                 .mode           = 0644,
 144                 .proc_handler   = proc_dointvec_minmax,
 145                 .extra1         = &min_proto,
 146                 .extra2         = &max_proto
 147         },
 148 #ifdef CONFIG_AX25_DAMA_SLAVE
 149         {
 150                 .procname       = "dama_slave_timeout",
 151                 .maxlen         = sizeof(int),
 152                 .mode           = 0644,
 153                 .proc_handler   = proc_dointvec_minmax,
 154                 .extra1         = &min_ds_timeout,
 155                 .extra2         = &max_ds_timeout
 156         },
 157 #endif
 158
 159         { }     /* that's all, folks! */
 160 };
 161
 162 void ax25_register_sysctl(void)
 163 {
 164         ax25_dev *ax25_dev;
 165         int n, k;
 166
 167         spin_lock_bh(&ax25_dev_lock);
 168         for (ax25_table_size = sizeof(ctl_table), ax25_dev = ax25_dev_list; ax25_dev != NULL; ax25_dev = ax25_dev->next)
 169                 ax25_table_size += sizeof(ctl_table);
 170
 171         if ((ax25_table = kzalloc(ax25_table_size, GFP_ATOMIC)) == NULL) {
 172                 spin_unlock_bh(&ax25_dev_lock);
 173                 return;
 174         }
 175
 176         for (n = 0, ax25_dev = ax25_dev_list; ax25_dev != NULL; ax25_dev = ax25_dev->next) {
 177                 struct ctl_table *child = kmemdup(ax25_param_table,
 178                                                   sizeof(ax25_param_table),
 179                                                   GFP_ATOMIC);
 180                 if (!child) {
 181                         while (n--)
 182                                 kfree(ax25_table[n].child);
 183                         kfree(ax25_table);
 184                         spin_unlock_bh(&ax25_dev_lock);
 185                         return;
 186                 }
 187                 ax25_table[n].child = ax25_dev->systable = child;
 188                 ax25_table[n].procname     = ax25_dev->dev->name;
 189                 ax25_table[n].mode         = 0555;
 190
 191
 192                 for (k = 0; k < AX25_MAX_VALUES; k++)
 193                         child[k].data = &ax25_dev->values[k];
 194
 195                 n++;
 196         }
 197         spin_unlock_bh(&ax25_dev_lock);
 198
 199         ax25_table_header = register_sysctl_paths(ax25_path, ax25_table);
 200 }
 201
 202 void ax25_unregister_sysctl(void)
 203 {
 204         ctl_table *p;
 205         unregister_sysctl_table(ax25_table_header);
 206
 207         for (p = ax25_table; p->procname; p++)
 208                 kfree(p->child);
 209         kfree(ax25_table);
 210 }