cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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ocb.c (1869B)

      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 * Author:    Rostislav Lisovy <rostislav.lisovy@fel.cvut.cz>
      8 * Funded by: Volkswagen Group Research
      9 */
     10
     11#include <linux/ieee80211.h>
     12#include <net/cfg80211.h>
     13#include "nl80211.h"
     14#include "core.h"
     15#include "rdev-ops.h"
     16
     17int __cfg80211_join_ocb(struct cfg80211_registered_device *rdev,
     18			struct net_device *dev,
     19			struct ocb_setup *setup)
     20{
     21	struct wireless_dev *wdev = dev->ieee80211_ptr;
     22	int err;
     23
     24	ASSERT_WDEV_LOCK(wdev);
     25
     26	if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_OCB)
     27		return -EOPNOTSUPP;
     28
     29	if (!rdev->ops->join_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
     42int 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
     56int __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
     77int 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}