linux/net/ax25/sysctl_net_ax25.c
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   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
  15static int min_ipdefmode[1],            max_ipdefmode[] = {1};
  16static int min_axdefmode[1],            max_axdefmode[] = {1};
  17static int min_backoff[1],              max_backoff[] = {2};
  18static int min_conmode[1],              max_conmode[] = {2};
  19static int min_window[] = {1},          max_window[] = {7};
  20static int min_ewindow[] = {1},         max_ewindow[] = {63};
  21static int min_t1[] = {1},              max_t1[] = {30000};
  22static int min_t2[] = {1},              max_t2[] = {20000};
  23static int min_t3[1],                   max_t3[] = {3600000};
  24static int min_idle[1],                 max_idle[] = {65535000};
  25static int min_n2[] = {1},              max_n2[] = {31};
  26static int min_paclen[] = {1},          max_paclen[] = {512};
  27static int min_proto[1],                max_proto[] = { AX25_PROTO_MAX };
  28#ifdef CONFIG_AX25_DAMA_SLAVE
  29static int min_ds_timeout[1],           max_ds_timeout[] = {65535000};
  30#endif
  31
  32static const 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
 151int 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
 173void 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}
 185
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