/*
   * Linux WiMAX
   * Implement and export a method for getting a WiMAX device current state
   *
   * Copyright (C) 2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
   *
   * Based on previous WiMAX core work by:
   *  Copyright (C) 2008 Intel Corporation <linux-wimax@intel.com>
   *  Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public License version
   * 2 as published by the Free Software Foundation.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
   * 02110-1301, USA.
   */
  
  #include <net/wimax.h>
  #include <net/genetlink.h>
  #include <linux/wimax.h>
  #include <linux/security.h>
  #include "wimax-internal.h"
  
  #define D_SUBMODULE op_state_get
  #include "debug-levels.h"

  static const struct nla_policy wimax_gnl_state_get_policy[WIMAX_GNL_ATTR_MAX + 1] = {

  	[WIMAX_GNL_STGET_IFIDX] = {
  		.type = NLA_U32,
  	},
  };
  
  
  /*
   * Exporting to user space over generic netlink
   *
   * Parse the state get command from user space, return a combination
   * value that describe the current state.
   *
   * No attributes.
   */
  static
  int wimax_gnl_doit_state_get(struct sk_buff *skb, struct genl_info *info)
  {
  	int result, ifindex;
  	struct wimax_dev *wimax_dev;

  
  	d_fnstart(3, NULL, "(skb %p info %p)
  ", skb, info);
  	result = -ENODEV;
  	if (info->attrs[WIMAX_GNL_STGET_IFIDX] == NULL) {
  		printk(KERN_ERR "WIMAX_GNL_OP_STATE_GET: can't find IFIDX "
  			"attribute
  ");
  		goto error_no_wimax_dev;
  	}
  	ifindex = nla_get_u32(info->attrs[WIMAX_GNL_STGET_IFIDX]);
  	wimax_dev = wimax_dev_get_by_genl_info(info, ifindex);
  	if (wimax_dev == NULL)
  		goto error_no_wimax_dev;

  	/* Execute the operation and send the result back to user space */
  	result = wimax_state_get(wimax_dev);
  	dev_put(wimax_dev->net_dev);
  error_no_wimax_dev:
  	d_fnend(3, NULL, "(skb %p info %p) = %d
  ", skb, info, result);
  	return result;
  }
  
  
  struct genl_ops wimax_gnl_state_get = {
  	.cmd = WIMAX_GNL_OP_STATE_GET,
  	.flags = GENL_ADMIN_PERM,
  	.policy = wimax_gnl_state_get_policy,
  	.doit = wimax_gnl_doit_state_get,
  	.dumpit = NULL,
  };