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 36static 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 */ 51static 52int 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 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; 63 } 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); 71error_no_wimax_dev: 72 d_fnend(3, NULL, "(skb %p info %p) = %d\n", skb, info, result); 73 return result; 74} 75 76 77struct 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, 83}; 84