1/*
2 * Linux WiMAX
3 * Implement and export a method for getting a WiMAX device current state
4 *
5 * Copyright (C) 2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
6 *
7 * Based on previous WiMAX core work by:
8 *  Copyright (C) 2008 Intel Corporation <linux-wimax@intel.com>
9 *  Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License version
13 * 2 as published by the Free Software Foundation.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
23 * 02110-1301, USA.
24 */
25
26#include <net/wimax.h>
27#include <net/genetlink.h>
28#include <linux/wimax.h>
29#include <linux/security.h>
30#include "wimax-internal.h"
31
32#define D_SUBMODULE op_state_get
33#include "debug-levels.h"
34
35
36/*
37 * Exporting to user space over generic netlink
38 *
39 * Parse the state get command from user space, return a combination
40 * value that describe the current state.
41 *
42 * No attributes.
43 */
44int wimax_gnl_doit_state_get(struct sk_buff *skb, struct genl_info *info)
45{
46	int result, ifindex;
47	struct wimax_dev *wimax_dev;
48
49	d_fnstart(3, NULL, "(skb %p info %p)\n", skb, info);
50	result = -ENODEV;
51	if (info->attrs[WIMAX_GNL_STGET_IFIDX] == NULL) {
52		pr_err("WIMAX_GNL_OP_STATE_GET: can't find IFIDX attribute\n");
53		goto error_no_wimax_dev;
54	}
55	ifindex = nla_get_u32(info->attrs[WIMAX_GNL_STGET_IFIDX]);
56	wimax_dev = wimax_dev_get_by_genl_info(info, ifindex);
57	if (wimax_dev == NULL)
58		goto error_no_wimax_dev;
59	/* Execute the operation and send the result back to user space */
60	result = wimax_state_get(wimax_dev);
61	dev_put(wimax_dev->net_dev);
62error_no_wimax_dev:
63	d_fnend(3, NULL, "(skb %p info %p) = %d\n", skb, info, result);
64	return result;
65}
66