/*
   * Copyright (c) 2006 Oracle.  All rights reserved.
   *
   * This software is available to you under a choice of one of two
   * licenses.  You may choose to be licensed under the terms of the GNU
   * General Public License (GPL) Version 2, available from the file
   * COPYING in the main directory of this source tree, or the
   * OpenIB.org BSD license below:
   *
   *     Redistribution and use in source and binary forms, with or
   *     without modification, are permitted provided that the following
   *     conditions are met:
   *
   *      - Redistributions of source code must retain the above
   *        copyright notice, this list of conditions and the following
   *        disclaimer.
   *
   *      - Redistributions in binary form must reproduce the above
   *        copyright notice, this list of conditions and the following
   *        disclaimer in the documentation and/or other materials
   *        provided with the distribution.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
   * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
   * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
   * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
   * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
   * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
   * SOFTWARE.
   *
   */
  #include <linux/kernel.h>
  #include <linux/sysctl.h>
  #include <linux/proc_fs.h>
  
  #include "rds.h"
  
  static struct ctl_table_header *rds_sysctl_reg_table;
  
  static unsigned long rds_sysctl_reconnect_min = 1;
  static unsigned long rds_sysctl_reconnect_max = ~0UL;
  
  unsigned long rds_sysctl_reconnect_min_jiffies;
  unsigned long rds_sysctl_reconnect_max_jiffies = HZ;
  
  unsigned int  rds_sysctl_max_unacked_packets = 8;
  unsigned int  rds_sysctl_max_unacked_bytes = (16 << 20);
  
  unsigned int rds_sysctl_ping_enable = 1;
  
  static struct ctl_table rds_sysctl_rds_table[] = {
  	{
  		.procname       = "reconnect_min_delay_ms",
  		.data		= &rds_sysctl_reconnect_min_jiffies,
  		.maxlen         = sizeof(unsigned long),
  		.mode           = 0644,
  		.proc_handler   = proc_doulongvec_ms_jiffies_minmax,
  		.extra1		= &rds_sysctl_reconnect_min,
  		.extra2		= &rds_sysctl_reconnect_max_jiffies,
  	},
  	{
  		.procname       = "reconnect_max_delay_ms",
  		.data		= &rds_sysctl_reconnect_max_jiffies,
  		.maxlen         = sizeof(unsigned long),
  		.mode           = 0644,
  		.proc_handler   = proc_doulongvec_ms_jiffies_minmax,
  		.extra1		= &rds_sysctl_reconnect_min_jiffies,
  		.extra2		= &rds_sysctl_reconnect_max,
  	},
  	{
  		.procname	= "max_unacked_packets",
  		.data		= &rds_sysctl_max_unacked_packets,
  		.maxlen         = sizeof(unsigned long),
  		.mode           = 0644,
  		.proc_handler   = proc_dointvec,
  	},
  	{
  		.procname	= "max_unacked_bytes",
  		.data		= &rds_sysctl_max_unacked_bytes,
  		.maxlen         = sizeof(unsigned long),
  		.mode           = 0644,
  		.proc_handler   = proc_dointvec,
  	},
  	{
  		.procname	= "ping_enable",
  		.data		= &rds_sysctl_ping_enable,
  		.maxlen         = sizeof(int),
  		.mode           = 0644,
  		.proc_handler   = proc_dointvec,
  	},
  	{ }
  };
  
  void rds_sysctl_exit(void)
  {
  	if (rds_sysctl_reg_table)
  		unregister_net_sysctl_table(rds_sysctl_reg_table);
  }
  
  int rds_sysctl_init(void)
  {
  	rds_sysctl_reconnect_min = msecs_to_jiffies(1);
  	rds_sysctl_reconnect_min_jiffies = rds_sysctl_reconnect_min;
  
  	rds_sysctl_reg_table = register_net_sysctl(&init_net,"net/rds", rds_sysctl_rds_table);
  	if (!rds_sysctl_reg_table)
  		return -ENOMEM;
  	return 0;
  }