net/wimax/op-state-get.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Linux WiMAX
   4  * Implement and export a method for getting a WiMAX device current state
   5  *
   6  * Copyright (C) 2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
   7  *
   8  * Based on previous WiMAX core work by:
   9  *  Copyright (C) 2008 Intel Corporation <linux-wimax@intel.com>
  10  *  Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
  11  */
  12
  13 #include <net/wimax.h>
  14 #include <net/genetlink.h>
  15 #include <linux/wimax.h>
  16 #include <linux/security.h>
  17 #include "wimax-internal.h"
  18
  19 #define D_SUBMODULE op_state_get
  20 #include "debug-levels.h"
  21
  22
  23 /*
  24  * Exporting to user space over generic netlink
  25  *
  26  * Parse the state get command from user space, return a combination
  27  * value that describe the current state.
  28  *
  29  * No attributes.
  30  */
  31 int wimax_gnl_doit_state_get(struct sk_buff *skb, struct genl_info *info)
  32 {
  33         int result, ifindex;
  34         struct wimax_dev *wimax_dev;
  35
  36         d_fnstart(3, NULL, "(skb %p info %p)\n", skb, info);
  37         result = -ENODEV;
  38         if (info->attrs[WIMAX_GNL_STGET_IFIDX] == NULL) {
  39                 pr_err("WIMAX_GNL_OP_STATE_GET: can't find IFIDX attribute\n");
  40                 goto error_no_wimax_dev;
  41         }
  42         ifindex = nla_get_u32(info->attrs[WIMAX_GNL_STGET_IFIDX]);
  43         wimax_dev = wimax_dev_get_by_genl_info(info, ifindex);
  44         if (wimax_dev == NULL)
  45                 goto error_no_wimax_dev;
  46         /* Execute the operation and send the result back to user space */
  47         result = wimax_state_get(wimax_dev);
  48         dev_put(wimax_dev->net_dev);
  49 error_no_wimax_dev:
  50         d_fnend(3, NULL, "(skb %p info %p) = %d\n", skb, info, result);
  51         return result;
  52 }