op-state-get.c 1.5 KB

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  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. #include <net/wimax.h>
  13. #include <net/genetlink.h>
  14. #include <linux/wimax.h>
  15. #include <linux/security.h>
  16. #include "wimax-internal.h"
  17. #define D_SUBMODULE op_state_get
  18. #include "debug-levels.h"
  19. /*
  20. * Exporting to user space over generic netlink
  21. *
  22. * Parse the state get command from user space, return a combination
  23. * value that describe the current state.
  24. *
  25. * No attributes.
  26. */
  27. int wimax_gnl_doit_state_get(struct sk_buff *skb, struct genl_info *info)
  28. {
  29. int result, ifindex;
  30. struct wimax_dev *wimax_dev;
  31. d_fnstart(3, NULL, "(skb %p info %p)\n", skb, info);
  32. result = -ENODEV;
  33. if (info->attrs[WIMAX_GNL_STGET_IFIDX] == NULL) {
  34. pr_err("WIMAX_GNL_OP_STATE_GET: can't find IFIDX attribute\n");
  35. goto error_no_wimax_dev;
  36. }
  37. ifindex = nla_get_u32(info->attrs[WIMAX_GNL_STGET_IFIDX]);
  38. wimax_dev = wimax_dev_get_by_genl_info(info, ifindex);
  39. if (wimax_dev == NULL)
  40. goto error_no_wimax_dev;
  41. /* Execute the operation and send the result back to user space */
  42. result = wimax_state_get(wimax_dev);
  43. dev_put(wimax_dev->net_dev);
  44. error_no_wimax_dev:
  45. d_fnend(3, NULL, "(skb %p info %p) = %d\n", skb, info, result);
  46. return result;
  47. }