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 const struct ctl_table ax25_param_table[] = {
  33         {
  34                 .procname       = "ip_default_mode",
  35                 .maxlen         = sizeof(int),
  36                 .mode           = 0644,
  37                 .proc_handler   = proc_dointvec_minmax,
  38                 .extra1         = &min_ipdefmode,
  39                 .extra2         = &max_ipdefmode
  40         },
  41         {
  42                 .procname       = "ax25_default_mode",
  43                 .maxlen         = sizeof(int),
  44                 .mode           = 0644,
  45                 .proc_handler   = proc_dointvec_minmax,
  46                 .extra1         = &min_axdefmode,
  47                 .extra2         = &max_axdefmode
  48         },
  49         {
  50                 .procname       = "backoff_type",
  51                 .maxlen         = sizeof(int),
  52                 .mode           = 0644,
  53                 .proc_handler   = proc_dointvec_minmax,
  54                 .extra1         = &min_backoff,
  55                 .extra2         = &max_backoff
  56         },
  57         {
  58                 .procname       = "connect_mode",
  59                 .maxlen         = sizeof(int),
  60                 .mode           = 0644,
  61                 .proc_handler   = proc_dointvec_minmax,
  62                 .extra1         = &min_conmode,
  63                 .extra2         = &max_conmode
  64         },
  65         {
  66                 .procname       = "standard_window_size",
  67                 .maxlen         = sizeof(int),
  68                 .mode           = 0644,
  69                 .proc_handler   = proc_dointvec_minmax,
  70                 .extra1         = &min_window,
  71                 .extra2         = &max_window
  72         },
  73         {
  74                 .procname       = "extended_window_size",
  75                 .maxlen         = sizeof(int),
  76                 .mode           = 0644,
  77                 .proc_handler   = proc_dointvec_minmax,
  78                 .extra1         = &min_ewindow,
  79                 .extra2         = &max_ewindow
  80         },
  81         {
  82                 .procname       = "t1_timeout",
  83                 .maxlen         = sizeof(int),
  84                 .mode           = 0644,
  85                 .proc_handler   = proc_dointvec_minmax,
  86                 .extra1         = &min_t1,
  87                 .extra2         = &max_t1
  88         },
  89         {
  90                 .procname       = "t2_timeout",
  91                 .maxlen         = sizeof(int),
  92                 .mode           = 0644,
  93                 .proc_handler   = proc_dointvec_minmax,
  94                 .extra1         = &min_t2,
  95                 .extra2         = &max_t2
  96         },
  97         {
  98                 .procname       = "t3_timeout",
  99                 .maxlen         = sizeof(int),
 100                 .mode           = 0644,
 101                 .proc_handler   = proc_dointvec_minmax,
 102                 .extra1         = &min_t3,
 103                 .extra2         = &max_t3
 104         },
 105         {
 106                 .procname       = "idle_timeout",
 107                 .maxlen         = sizeof(int),
 108                 .mode           = 0644,
 109                 .proc_handler   = proc_dointvec_minmax,
 110                 .extra1         = &min_idle,
 111                 .extra2         = &max_idle
 112         },
 113         {
 114                 .procname       = "maximum_retry_count",
 115                 .maxlen         = sizeof(int),
 116                 .mode           = 0644,
 117                 .proc_handler   = proc_dointvec_minmax,
 118                 .extra1         = &min_n2,
 119                 .extra2         = &max_n2
 120         },
 121         {
 122                 .procname       = "maximum_packet_length",
 123                 .maxlen         = sizeof(int),
 124                 .mode           = 0644,
 125                 .proc_handler   = proc_dointvec_minmax,
 126                 .extra1         = &min_paclen,
 127                 .extra2         = &max_paclen
 128         },
 129         {
 130                 .procname       = "protocol",
 131                 .maxlen         = sizeof(int),
 132                 .mode           = 0644,
 133                 .proc_handler   = proc_dointvec_minmax,
 134                 .extra1         = &min_proto,
 135                 .extra2         = &max_proto
 136         },
 137 #ifdef CONFIG_AX25_DAMA_SLAVE
 138         {
 139                 .procname       = "dama_slave_timeout",
 140                 .maxlen         = sizeof(int),
 141                 .mode           = 0644,
 142                 .proc_handler   = proc_dointvec_minmax,
 143                 .extra1         = &min_ds_timeout,
 144                 .extra2         = &max_ds_timeout
 145         },
 146 #endif
 147
 148         { }     /* that's all, folks! */
 149 };
 150
 151 int ax25_register_dev_sysctl(ax25_dev *ax25_dev)
 152 {
 153         char path[sizeof("net/ax25/") + IFNAMSIZ];
 154         int k;
 155         struct ctl_table *table;
 156
 157         table = kmemdup(ax25_param_table, sizeof(ax25_param_table), GFP_KERNEL);
 158         if (!table)
 159                 return -ENOMEM;
 160
 161         for (k = 0; k < AX25_MAX_VALUES; k++)
 162                 table[k].data = &ax25_dev->values[k];
 163
 164         snprintf(path, sizeof(path), "net/ax25/%s", ax25_dev->dev->name);
 165         ax25_dev->sysheader = register_net_sysctl(&init_net, path, table);
 166         if (!ax25_dev->sysheader) {
 167                 kfree(table);
 168                 return -ENOMEM;
 169         }
 170         return 0;
 171 }
 172
 173 void ax25_unregister_dev_sysctl(ax25_dev *ax25_dev)
 174 {
 175         struct ctl_table_header *header = ax25_dev->sysheader;
 176         struct ctl_table *table;
 177
 178         if (header) {
 179                 ax25_dev->sysheader = NULL;
 180                 table = header->ctl_table_arg;
 181                 unregister_net_sysctl_table(header);
 182                 kfree(table);
 183         }
 184 }