Merge branch 'media_fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab...
[cris-mirror.git] / net / wimax / op-state-get.c
blobaff8776e2d41a5d4020bdd5f8c937830e6e214a6
1 /*
2 * Linux WiMAX
3 * Implement and export a method for getting a WiMAX device current state
5 * Copyright (C) 2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
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>
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.
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.
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.
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"
32 #define D_SUBMODULE op_state_get
33 #include "debug-levels.h"
36 static const struct nla_policy wimax_gnl_state_get_policy[WIMAX_GNL_ATTR_MAX + 1] = {
37 [WIMAX_GNL_STGET_IFIDX] = {
38 .type = NLA_U32,
44 * Exporting to user space over generic netlink
46 * Parse the state get command from user space, return a combination
47 * value that describe the current state.
49 * No attributes.
51 static
52 int wimax_gnl_doit_state_get(struct sk_buff *skb, struct genl_info *info)
54 int result, ifindex;
55 struct wimax_dev *wimax_dev;
57 d_fnstart(3, NULL, "(skb %p info %p)\n", skb, info);
58 result = -ENODEV;
59 if (info->attrs[WIMAX_GNL_STGET_IFIDX] == NULL) {
60 printk(KERN_ERR "WIMAX_GNL_OP_STATE_GET: can't find IFIDX "
61 "attribute\n");
62 goto error_no_wimax_dev;
64 ifindex = nla_get_u32(info->attrs[WIMAX_GNL_STGET_IFIDX]);
65 wimax_dev = wimax_dev_get_by_genl_info(info, ifindex);
66 if (wimax_dev == NULL)
67 goto error_no_wimax_dev;
68 /* Execute the operation and send the result back to user space */
69 result = wimax_state_get(wimax_dev);
70 dev_put(wimax_dev->net_dev);
71 error_no_wimax_dev:
72 d_fnend(3, NULL, "(skb %p info %p) = %d\n", skb, info, result);
73 return result;
77 struct genl_ops wimax_gnl_state_get = {
78 .cmd = WIMAX_GNL_OP_STATE_GET,
79 .flags = GENL_ADMIN_PERM,
80 .policy = wimax_gnl_state_get_policy,
81 .doit = wimax_gnl_doit_state_get,
82 .dumpit = NULL,