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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 | static const struct nla_policy wimax_gnl_state_get_policy[WIMAX_GNL_ATTR_MAX + 1] = { |
37 | [WIMAX_GNL_STGET_IFIDX] = { |
38 | .type = NLA_U32, |
39 | }, |
40 | }; |
41 | |
42 | |
43 | /* |
44 | * Exporting to user space over generic netlink |
45 | * |
46 | * Parse the state get command from user space, return a combination |
47 | * value that describe the current state. |
48 | * |
49 | * No attributes. |
50 | */ |
51 | static |
52 | int wimax_gnl_doit_state_get(struct sk_buff *skb, struct genl_info *info) |
53 | { |
54 | int result, ifindex; |
55 | struct wimax_dev *wimax_dev; |
56 | struct device *dev; |
57 | |
58 | d_fnstart(3, NULL, "(skb %p info %p)\n", skb, info); |
59 | result = -ENODEV; |
60 | if (info->attrs[WIMAX_GNL_STGET_IFIDX] == NULL) { |
61 | printk(KERN_ERR "WIMAX_GNL_OP_STATE_GET: can't find IFIDX " |
62 | "attribute\n"); |
63 | goto error_no_wimax_dev; |
64 | } |
65 | ifindex = nla_get_u32(info->attrs[WIMAX_GNL_STGET_IFIDX]); |
66 | wimax_dev = wimax_dev_get_by_genl_info(info, ifindex); |
67 | if (wimax_dev == NULL) |
68 | goto error_no_wimax_dev; |
69 | dev = wimax_dev_to_dev(wimax_dev); |
70 | /* Execute the operation and send the result back to user space */ |
71 | result = wimax_state_get(wimax_dev); |
72 | dev_put(wimax_dev->net_dev); |
73 | error_no_wimax_dev: |
74 | d_fnend(3, NULL, "(skb %p info %p) = %d\n", skb, info, result); |
75 | return result; |
76 | } |
77 | |
78 | |
79 | struct genl_ops wimax_gnl_state_get = { |
80 | .cmd = WIMAX_GNL_OP_STATE_GET, |
81 | .flags = GENL_ADMIN_PERM, |
82 | .policy = wimax_gnl_state_get_policy, |
83 | .doit = wimax_gnl_doit_state_get, |
84 | .dumpit = NULL, |
85 | }; |
86 |
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