kernel/net/wireless/ocb.c

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