/*
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as published by
   * the Free Software Foundation; either version 2 of the License, or
   * (at your option) any later version.
   *
   * Copyright (C) 1996 Mike Shaver (shaver@zeroknowledge.com)
   */

  #include <linux/mm.h>

  #include <linux/slab.h>

  #include <linux/sysctl.h>
  #include <linux/spinlock.h>
  #include <net/ax25.h>
  
  static int min_ipdefmode[1],    	max_ipdefmode[] = {1};
  static int min_axdefmode[1],            max_axdefmode[] = {1};
  static int min_backoff[1],		max_backoff[] = {2};
  static int min_conmode[1],		max_conmode[] = {2};
  static int min_window[] = {1},		max_window[] = {7};
  static int min_ewindow[] = {1},		max_ewindow[] = {63};

  static int min_t1[] = {1},		max_t1[] = {30000};
  static int min_t2[] = {1},		max_t2[] = {20000};
  static int min_t3[1],			max_t3[] = {3600000};
  static int min_idle[1],			max_idle[] = {65535000};

  static int min_n2[] = {1},		max_n2[] = {31};
  static int min_paclen[] = {1},		max_paclen[] = {512};

  static int min_proto[1],		max_proto[] = { AX25_PROTO_MAX };

  #ifdef CONFIG_AX25_DAMA_SLAVE

  static int min_ds_timeout[1],		max_ds_timeout[] = {65535000};

  #endif

  
  static struct ctl_table_header *ax25_table_header;
  
  static ctl_table *ax25_table;
  static int ax25_table_size;

  static struct ctl_path ax25_path[] = {

  	{ .procname = "net", },
  	{ .procname = "ax25", },

  	{ }

  };

  static const ctl_table ax25_param_table[] = {
  	{

  		.procname	= "ip_default_mode",
  		.maxlen		= sizeof(int),
  		.mode		= 0644,

  		.proc_handler	= proc_dointvec_minmax,

  		.extra1		= &min_ipdefmode,
  		.extra2		= &max_ipdefmode
  	},
  	{

  		.procname	= "ax25_default_mode",
  		.maxlen		= sizeof(int),
  		.mode		= 0644,

  		.proc_handler	= proc_dointvec_minmax,

  		.extra1		= &min_axdefmode,
  		.extra2		= &max_axdefmode
  	},
  	{

  		.procname	= "backoff_type",
  		.maxlen		= sizeof(int),
  		.mode		= 0644,

  		.proc_handler	= proc_dointvec_minmax,

  		.extra1		= &min_backoff,
  		.extra2		= &max_backoff
  	},
  	{

  		.procname	= "connect_mode",
  		.maxlen		= sizeof(int),
  		.mode		= 0644,

  		.proc_handler	= proc_dointvec_minmax,

  		.extra1		= &min_conmode,
  		.extra2		= &max_conmode
  	},
  	{

  		.procname	= "standard_window_size",
  		.maxlen		= sizeof(int),
  		.mode		= 0644,

  		.proc_handler	= proc_dointvec_minmax,

  		.extra1		= &min_window,
  		.extra2		= &max_window
  	},
  	{

  		.procname	= "extended_window_size",
  		.maxlen		= sizeof(int),
  		.mode		= 0644,

  		.proc_handler	= proc_dointvec_minmax,

  		.extra1		= &min_ewindow,
  		.extra2		= &max_ewindow
  	},
  	{

  		.procname	= "t1_timeout",
  		.maxlen		= sizeof(int),
  		.mode		= 0644,

  		.proc_handler	= proc_dointvec_minmax,

  		.extra1		= &min_t1,
  		.extra2		= &max_t1
  	},
  	{

  		.procname	= "t2_timeout",
  		.maxlen		= sizeof(int),
  		.mode		= 0644,

  		.proc_handler	= proc_dointvec_minmax,

  		.extra1		= &min_t2,
  		.extra2		= &max_t2
  	},
  	{

  		.procname	= "t3_timeout",
  		.maxlen		= sizeof(int),
  		.mode		= 0644,

  		.proc_handler	= proc_dointvec_minmax,

  		.extra1		= &min_t3,
  		.extra2		= &max_t3
  	},
  	{

  		.procname	= "idle_timeout",
  		.maxlen		= sizeof(int),
  		.mode		= 0644,

  		.proc_handler	= proc_dointvec_minmax,

  		.extra1		= &min_idle,
  		.extra2		= &max_idle
  	},
  	{

  		.procname	= "maximum_retry_count",
  		.maxlen		= sizeof(int),
  		.mode		= 0644,

  		.proc_handler	= proc_dointvec_minmax,

  		.extra1		= &min_n2,
  		.extra2		= &max_n2
  	},
  	{

  		.procname	= "maximum_packet_length",
  		.maxlen		= sizeof(int),
  		.mode		= 0644,

  		.proc_handler	= proc_dointvec_minmax,

  		.extra1		= &min_paclen,
  		.extra2		= &max_paclen
  	},
  	{

  		.procname	= "protocol",
  		.maxlen		= sizeof(int),
  		.mode		= 0644,

  		.proc_handler	= proc_dointvec_minmax,

  		.extra1		= &min_proto,
  		.extra2		= &max_proto
  	},

  #ifdef CONFIG_AX25_DAMA_SLAVE

  	{

  		.procname	= "dama_slave_timeout",
  		.maxlen		= sizeof(int),
  		.mode		= 0644,

  		.proc_handler	= proc_dointvec_minmax,

  		.extra1		= &min_ds_timeout,
  		.extra2		= &max_ds_timeout
  	},

  #endif

  	{ }	/* that's all, folks! */

  };
  
  void ax25_register_sysctl(void)
  {
  	ax25_dev *ax25_dev;
  	int n, k;
  
  	spin_lock_bh(&ax25_dev_lock);
  	for (ax25_table_size = sizeof(ctl_table), ax25_dev = ax25_dev_list; ax25_dev != NULL; ax25_dev = ax25_dev->next)
  		ax25_table_size += sizeof(ctl_table);

  	if ((ax25_table = kzalloc(ax25_table_size, GFP_ATOMIC)) == NULL) {

  		spin_unlock_bh(&ax25_dev_lock);
  		return;
  	}

  	for (n = 0, ax25_dev = ax25_dev_list; ax25_dev != NULL; ax25_dev = ax25_dev->next) {

  		struct ctl_table *child = kmemdup(ax25_param_table,
  						  sizeof(ax25_param_table),
  						  GFP_ATOMIC);

  		if (!child) {
  			while (n--)
  				kfree(ax25_table[n].child);
  			kfree(ax25_table);
  			spin_unlock_bh(&ax25_dev_lock);
  			return;
  		}

  		ax25_table[n].child = ax25_dev->systable = child;

  		ax25_table[n].procname     = ax25_dev->dev->name;
  		ax25_table[n].mode         = 0555;

  
  		for (k = 0; k < AX25_MAX_VALUES; k++)
  			child[k].data = &ax25_dev->values[k];
  
  		n++;
  	}
  	spin_unlock_bh(&ax25_dev_lock);

  	ax25_table_header = register_sysctl_paths(ax25_path, ax25_table);

  }
  
  void ax25_unregister_sysctl(void)
  {
  	ctl_table *p;
  	unregister_sysctl_table(ax25_table_header);

  	for (p = ax25_table; p->procname; p++)

  		kfree(p->child);
  	kfree(ax25_table);
  }