net/wireless/ocb.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * OCB mode implementation
   4  *
   5  * Copyright: (c) 2014 Czech Technical University in Prague
   6  *            (c) 2014 Volkswagen Group Research
   7  * Copyright (C) 2022 Intel Corporation
   8  * Author:    Rostislav Lisovy <rostislav.lisovy@fel.cvut.cz>
   9  * Funded by: Volkswagen Group Research
  10  */
  11
  12 #include <linux/ieee80211.h>
  13 #include <net/cfg80211.h>
  14 #include "nl80211.h"
  15 #include "core.h"
  16 #include "rdev-ops.h"
  17
  18 int __cfg80211_join_ocb(struct cfg80211_registered_device *rdev,
  19                         struct net_device *dev,
  20                         struct ocb_setup *setup)
  21 {
  22         struct wireless_dev *wdev = dev->ieee80211_ptr;
  23         int err;
  24
  25         ASSERT_WDEV_LOCK(wdev);
  26
  27         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_OCB)
  28                 return -EOPNOTSUPP;
  29
  30         if (!rdev->ops->join_ocb)
  31                 return -EOPNOTSUPP;
  32
  33         if (WARN_ON(!setup->chandef.chan))
  34                 return -EINVAL;
  35
  36         err = rdev_join_ocb(rdev, dev, setup);
  37         if (!err)
  38                 wdev->u.ocb.chandef = setup->chandef;
  39
  40         return err;
  41 }
  42
  43 int cfg80211_join_ocb(struct cfg80211_registered_device *rdev,
  44                       struct net_device *dev,
  45                       struct ocb_setup *setup)
  46 {
  47         struct wireless_dev *wdev = dev->ieee80211_ptr;
  48         int err;
  49
  50         wdev_lock(wdev);
  51         err = __cfg80211_join_ocb(rdev, dev, setup);
  52         wdev_unlock(wdev);
  53
  54         return err;
  55 }
  56
  57 int __cfg80211_leave_ocb(struct cfg80211_registered_device *rdev,
  58                          struct net_device *dev)
  59 {
  60         struct wireless_dev *wdev = dev->ieee80211_ptr;
  61         int err;
  62
  63         ASSERT_WDEV_LOCK(wdev);
  64
  65         if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_OCB)
  66                 return -EOPNOTSUPP;
  67
  68         if (!rdev->ops->leave_ocb)
  69                 return -EOPNOTSUPP;
  70
  71         err = rdev_leave_ocb(rdev, dev);
  72         if (!err)
  73                 memset(&wdev->u.ocb.chandef, 0, sizeof(wdev->u.ocb.chandef));
  74
  75         return err;
  76 }
  77
  78 int cfg80211_leave_ocb(struct cfg80211_registered_device *rdev,
  79                        struct net_device *dev)
  80 {
  81         struct wireless_dev *wdev = dev->ieee80211_ptr;
  82         int err;
  83
  84         wdev_lock(wdev);
  85         err = __cfg80211_leave_ocb(rdev, dev);
  86         wdev_unlock(wdev);
  87
  88         return err;
  89 }