openwrt/package/kernel/mac80211/patches/subsys/327-mac80211-reorganize-code-to-remove-a-forward-declara.patch

From: Felix Fietkau <[email protected]>
Date: Tue, 8 Sep 2020 12:16:26 +0200
Subject: [PATCH] mac80211: reorganize code to remove a forward
 declaration

Remove the newly added ieee80211_set_vif_encap_ops declaration.
No further code changes

Signed-off-by: Felix Fietkau <[email protected]>
---

--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -43,7 +43,6 @@
  */
 
 static void ieee80211_iface_work(struct work_struct *work);
-static void ieee80211_set_vif_encap_ops(struct ieee80211_sub_if_data *sdata);
 
 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
 {
@@ -349,6 +348,518 @@ static int ieee80211_check_queues(struct
 	return 0;
 }
 
+static int ieee80211_open(struct net_device *dev)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+	int err;
+
+	/* fail early if user set an invalid address */
+	if (!is_valid_ether_addr(dev->dev_addr))
+		return -EADDRNOTAVAIL;
+
+	err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
+	if (err)
+		return err;
+
+	return ieee80211_do_open(&sdata->wdev, true);
+}
+
+static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
+			      bool going_down)
+{
+	struct ieee80211_local *local = sdata->local;
+	unsigned long flags;
+	struct sk_buff *skb, *tmp;
+	u32 hw_reconf_flags = 0;
+	int i, flushed;
+	struct ps_data *ps;
+	struct cfg80211_chan_def chandef;
+	bool cancel_scan;
+	struct cfg80211_nan_func *func;
+
+	clear_bit(SDATA_STATE_RUNNING, &sdata->state);
+
+	cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
+	if (cancel_scan)
+		ieee80211_scan_cancel(local);
+
+	/*
+	 * Stop TX on this interface first.
+	 */
+	if (sdata->dev)
+		netif_tx_stop_all_queues(sdata->dev);
+
+	ieee80211_roc_purge(local, sdata);
+
+	switch (sdata->vif.type) {
+	case NL80211_IFTYPE_STATION:
+		ieee80211_mgd_stop(sdata);
+		break;
+	case NL80211_IFTYPE_ADHOC:
+		ieee80211_ibss_stop(sdata);
+		break;
+	case NL80211_IFTYPE_MONITOR:
+		if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
+			break;
+		list_del_rcu(&sdata->u.mntr.list);
+		break;
+	default:
+		break;
+	}
+
+	/*
+	 * Remove all stations associated with this interface.
+	 *
+	 * This must be done before calling ops->remove_interface()
+	 * because otherwise we can later invoke ops->sta_notify()
+	 * whenever the STAs are removed, and that invalidates driver
+	 * assumptions about always getting a vif pointer that is valid
+	 * (because if we remove a STA after ops->remove_interface()
+	 * the driver will have removed the vif info already!)
+	 *
+	 * In WDS mode a station must exist here and be flushed, for
+	 * AP_VLANs stations may exist since there's nothing else that
+	 * would have removed them, but in other modes there shouldn't
+	 * be any stations.
+	 */
+	flushed = sta_info_flush(sdata);
+	WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
+		     ((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
+		      (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1)));
+
+	/* don't count this interface for allmulti while it is down */
+	if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
+		atomic_dec(&local->iff_allmultis);
+
+	if (sdata->vif.type == NL80211_IFTYPE_AP) {
+		local->fif_pspoll--;
+		local->fif_probe_req--;
+	} else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
+		local->fif_probe_req--;
+	}
+
+	if (sdata->dev) {
+		netif_addr_lock_bh(sdata->dev);
+		spin_lock_bh(&local->filter_lock);
+		__hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
+				 sdata->dev->addr_len);
+		spin_unlock_bh(&local->filter_lock);
+		netif_addr_unlock_bh(sdata->dev);
+	}
+
+	del_timer_sync(&local->dynamic_ps_timer);
+	cancel_work_sync(&local->dynamic_ps_enable_work);
+
+	cancel_work_sync(&sdata->recalc_smps);
+	sdata_lock(sdata);
+	mutex_lock(&local->mtx);
+	sdata->vif.csa_active = false;
+	if (sdata->vif.type == NL80211_IFTYPE_STATION)
+		sdata->u.mgd.csa_waiting_bcn = false;
+	if (sdata->csa_block_tx) {
+		ieee80211_wake_vif_queues(local, sdata,
+					  IEEE80211_QUEUE_STOP_REASON_CSA);
+		sdata->csa_block_tx = false;
+	}
+	mutex_unlock(&local->mtx);
+	sdata_unlock(sdata);
+
+	cancel_work_sync(&sdata->csa_finalize_work);
+
+	cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
+
+	if (sdata->wdev.cac_started) {
+		chandef = sdata->vif.bss_conf.chandef;
+		WARN_ON(local->suspended);
+		mutex_lock(&local->mtx);
+		ieee80211_vif_release_channel(sdata);
+		mutex_unlock(&local->mtx);
+		cfg80211_cac_event(sdata->dev, &chandef,
+				   NL80211_RADAR_CAC_ABORTED,
+				   GFP_KERNEL);
+	}
+
+	/* APs need special treatment */
+	if (sdata->vif.type == NL80211_IFTYPE_AP) {
+		struct ieee80211_sub_if_data *vlan, *tmpsdata;
+
+		/* down all dependent devices, that is VLANs */
+		list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
+					 u.vlan.list)
+			dev_close(vlan->dev);
+		WARN_ON(!list_empty(&sdata->u.ap.vlans));
+	} else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
+		/* remove all packets in parent bc_buf pointing to this dev */
+		ps = &sdata->bss->ps;
+
+		spin_lock_irqsave(&ps->bc_buf.lock, flags);
+		skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
+			if (skb->dev == sdata->dev) {
+				__skb_unlink(skb, &ps->bc_buf);
+				local->total_ps_buffered--;
+				ieee80211_free_txskb(&local->hw, skb);
+			}
+		}
+		spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
+	}
+
+	if (going_down)
+		local->open_count--;
+
+	switch (sdata->vif.type) {
+	case NL80211_IFTYPE_AP_VLAN:
+		mutex_lock(&local->mtx);
+		list_del(&sdata->u.vlan.list);
+		mutex_unlock(&local->mtx);
+		RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
+		/* see comment in the default case below */
+		ieee80211_free_keys(sdata, true);
+		/* no need to tell driver */
+		break;
+	case NL80211_IFTYPE_MONITOR:
+		if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
+			local->cooked_mntrs--;
+			break;
+		}
+
+		local->monitors--;
+		if (local->monitors == 0) {
+			local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
+			hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
+		}
+
+		ieee80211_adjust_monitor_flags(sdata, -1);
+		break;
+	case NL80211_IFTYPE_NAN:
+		/* clean all the functions */
+		spin_lock_bh(&sdata->u.nan.func_lock);
+
+		idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) {
+			idr_remove(&sdata->u.nan.function_inst_ids, i);
+			cfg80211_free_nan_func(func);
+		}
+		idr_destroy(&sdata->u.nan.function_inst_ids);
+
+		spin_unlock_bh(&sdata->u.nan.func_lock);
+		break;
+	case NL80211_IFTYPE_P2P_DEVICE:
+		/* relies on synchronize_rcu() below */
+		RCU_INIT_POINTER(local->p2p_sdata, NULL);
+		fallthrough;
+	default:
+		cancel_work_sync(&sdata->work);
+		/*
+		 * When we get here, the interface is marked down.
+		 * Free the remaining keys, if there are any
+		 * (which can happen in AP mode if userspace sets
+		 * keys before the interface is operating, and maybe
+		 * also in WDS mode)
+		 *
+		 * Force the key freeing to always synchronize_net()
+		 * to wait for the RX path in case it is using this
+		 * interface enqueuing frames at this very time on
+		 * another CPU.
+		 */
+		ieee80211_free_keys(sdata, true);
+		skb_queue_purge(&sdata->skb_queue);
+	}
+
+	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
+	for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
+		skb_queue_walk_safe(&local->pending[i], skb, tmp) {
+			struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+			if (info->control.vif == &sdata->vif) {
+				__skb_unlink(skb, &local->pending[i]);
+				ieee80211_free_txskb(&local->hw, skb);
+			}
+		}
+	}
+	spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
+
+	if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
+		ieee80211_txq_remove_vlan(local, sdata);
+
+	sdata->bss = NULL;
+
+	if (local->open_count == 0)
+		ieee80211_clear_tx_pending(local);
+
+	sdata->vif.bss_conf.beacon_int = 0;
+
+	/*
+	 * If the interface goes down while suspended, presumably because
+	 * the device was unplugged and that happens before our resume,
+	 * then the driver is already unconfigured and the remainder of
+	 * this function isn't needed.
+	 * XXX: what about WoWLAN? If the device has software state, e.g.
+	 *	memory allocated, it might expect teardown commands from
+	 *	mac80211 here?
+	 */
+	if (local->suspended) {
+		WARN_ON(local->wowlan);
+		WARN_ON(rtnl_dereference(local->monitor_sdata));
+		return;
+	}
+
+	switch (sdata->vif.type) {
+	case NL80211_IFTYPE_AP_VLAN:
+		break;
+	case NL80211_IFTYPE_MONITOR:
+		if (local->monitors == 0)
+			ieee80211_del_virtual_monitor(local);
+
+		mutex_lock(&local->mtx);
+		ieee80211_recalc_idle(local);
+		mutex_unlock(&local->mtx);
+
+		if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
+			break;
+
+		fallthrough;
+	default:
+		if (going_down)
+			drv_remove_interface(local, sdata);
+	}
+
+	ieee80211_recalc_ps(local);
+
+	if (cancel_scan)
+		flush_delayed_work(&local->scan_work);
+
+	if (local->open_count == 0) {
+		ieee80211_stop_device(local);
+
+		/* no reconfiguring after stop! */
+		return;
+	}
+
+	/* do after stop to avoid reconfiguring when we stop anyway */
+	ieee80211_configure_filter(local);
+	ieee80211_hw_config(local, hw_reconf_flags);
+
+	if (local->monitors == local->open_count)
+		ieee80211_add_virtual_monitor(local);
+}
+
+static int ieee80211_stop(struct net_device *dev)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+
+	ieee80211_do_stop(sdata, true);
+
+	return 0;
+}
+
+static void ieee80211_set_multicast_list(struct net_device *dev)
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+	struct ieee80211_local *local = sdata->local;
+	int allmulti, sdata_allmulti;
+
+	allmulti = !!(dev->flags & IFF_ALLMULTI);
+	sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
+
+	if (allmulti != sdata_allmulti) {
+		if (dev->flags & IFF_ALLMULTI)
+			atomic_inc(&local->iff_allmultis);
+		else
+			atomic_dec(&local->iff_allmultis);
+		sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
+	}
+
+	spin_lock_bh(&local->filter_lock);
+	__hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
+	spin_unlock_bh(&local->filter_lock);
+	ieee80211_queue_work(&local->hw, &local->reconfig_filter);
+}
+
+/*
+ * Called when the netdev is removed or, by the code below, before
+ * the interface type changes.
+ */
+static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
+{
+	int i;
+
+	/* free extra data */
+	ieee80211_free_keys(sdata, false);
+
+	ieee80211_debugfs_remove_netdev(sdata);
+
+	for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
+		__skb_queue_purge(&sdata->fragments[i].skb_list);
+	sdata->fragment_next = 0;
+
+	if (ieee80211_vif_is_mesh(&sdata->vif))
+		ieee80211_mesh_teardown_sdata(sdata);
+}
+
+static void ieee80211_uninit(struct net_device *dev)
+{
+	ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
+}
+
+#if LINUX_VERSION_IS_GEQ(5,2,0)
+static u16 ieee80211_netdev_select_queue(struct net_device *dev,
+					 struct sk_buff *skb,
+					 struct net_device *sb_dev)
+#elif LINUX_VERSION_IS_GEQ(4,19,0)
+static u16 ieee80211_netdev_select_queue(struct net_device *dev,
+					 struct sk_buff *skb,
+					 struct net_device *sb_dev,
+					 select_queue_fallback_t fallback)
+#elif LINUX_VERSION_IS_GEQ(3,14,0) || \
+    (LINUX_VERSION_CODE == KERNEL_VERSION(3,13,11) && UTS_UBUNTU_RELEASE_ABI > 30)
+static u16 ieee80211_netdev_select_queue(struct net_device *dev,
+					 struct sk_buff *skb,
+					 void *accel_priv,
+					 select_queue_fallback_t fallback)
+#elif LINUX_VERSION_IS_GEQ(3,13,0)
+static u16 ieee80211_netdev_select_queue(struct net_device *dev,
+					 struct sk_buff *skb,
+					 void *accel_priv)
+#else
+static u16 ieee80211_netdev_select_queue(struct net_device *dev,
+					 struct sk_buff *skb)
+#endif
+{
+	return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
+}
+
+static void
+ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
+{
+	int i;
+
+	for_each_possible_cpu(i) {
+		const struct pcpu_sw_netstats *tstats;
+		u64 rx_packets, rx_bytes, tx_packets, tx_bytes;
+		unsigned int start;
+
+		tstats = per_cpu_ptr(netdev_tstats(dev), i);
+
+		do {
+			start = u64_stats_fetch_begin_irq(&tstats->syncp);
+			rx_packets = tstats->rx_packets;
+			tx_packets = tstats->tx_packets;
+			rx_bytes = tstats->rx_bytes;
+			tx_bytes = tstats->tx_bytes;
+		} while (u64_stats_fetch_retry_irq(&tstats->syncp, start));
+
+		stats->rx_packets += rx_packets;
+		stats->tx_packets += tx_packets;
+		stats->rx_bytes   += rx_bytes;
+		stats->tx_bytes   += tx_bytes;
+	}
+}
+#if LINUX_VERSION_IS_LESS(4,11,0)
+/* Just declare it here to keep sparse happy */
+struct rtnl_link_stats64 *bp_ieee80211_get_stats64(struct net_device *dev,
+						   struct rtnl_link_stats64 *stats);
+struct rtnl_link_stats64 *
+bp_ieee80211_get_stats64(struct net_device *dev,
+			 struct rtnl_link_stats64 *stats){
+	ieee80211_get_stats64(dev, stats);
+	return stats;
+}
+#endif
+
+static const struct net_device_ops ieee80211_dataif_ops = {
+	.ndo_open		= ieee80211_open,
+	.ndo_stop		= ieee80211_stop,
+	.ndo_uninit		= ieee80211_uninit,
+	.ndo_start_xmit		= ieee80211_subif_start_xmit,
+	.ndo_set_rx_mode	= ieee80211_set_multicast_list,
+	.ndo_set_mac_address 	= ieee80211_change_mac,
+	.ndo_select_queue	= ieee80211_netdev_select_queue,
+#if LINUX_VERSION_IS_GEQ(4,11,0)
+	.ndo_get_stats64	= ieee80211_get_stats64,
+#else
+	.ndo_get_stats64 = bp_ieee80211_get_stats64,
+#endif
+
+};
+
+#if LINUX_VERSION_IS_GEQ(5,2,0)
+static u16 ieee80211_monitor_select_queue(struct net_device *dev,
+					  struct sk_buff *skb,
+					  struct net_device *sb_dev)
+#elif LINUX_VERSION_IS_GEQ(4,19,0)
+static u16 ieee80211_monitor_select_queue(struct net_device *dev,
+					  struct sk_buff *skb,
+					  struct net_device *sb_dev,
+					  select_queue_fallback_t fallback)
+#elif LINUX_VERSION_IS_GEQ(3,14,0) || \
+    (LINUX_VERSION_CODE == KERNEL_VERSION(3,13,11) && UTS_UBUNTU_RELEASE_ABI > 30)
+static u16 ieee80211_monitor_select_queue(struct net_device *dev,
+					  struct sk_buff *skb,
+					  void *accel_priv,
+					  select_queue_fallback_t fallback)
+#elif LINUX_VERSION_IS_GEQ(3,13,0)
+static u16 ieee80211_monitor_select_queue(struct net_device *dev,
+					  struct sk_buff *skb,
+					  void *accel_priv)
+#else
+static u16 ieee80211_monitor_select_queue(struct net_device *dev,
+					  struct sk_buff *skb)
+#endif
+{
+	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
+	struct ieee80211_hdr *hdr;
+	int len_rthdr;
+
+	if (local->hw.queues < IEEE80211_NUM_ACS)
+		return 0;
+
+	/* reset flags and info before parsing radiotap header */
+	memset(info, 0, sizeof(*info));
+
+	if (!ieee80211_parse_tx_radiotap(skb, dev))
+		return 0; /* doesn't matter, frame will be dropped */
+
+	len_rthdr = ieee80211_get_radiotap_len(skb->data);
+	hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
+	if (skb->len < len_rthdr + 2 ||
+	    skb->len < len_rthdr + ieee80211_hdrlen(hdr->frame_control))
+		return 0; /* doesn't matter, frame will be dropped */
+
+	return ieee80211_select_queue_80211(sdata, skb, hdr);
+}
+
+static const struct net_device_ops ieee80211_monitorif_ops = {
+	.ndo_open		= ieee80211_open,
+	.ndo_stop		= ieee80211_stop,
+	.ndo_uninit		= ieee80211_uninit,
+	.ndo_start_xmit		= ieee80211_monitor_start_xmit,
+	.ndo_set_rx_mode	= ieee80211_set_multicast_list,
+	.ndo_set_mac_address 	= ieee80211_change_mac,
+	.ndo_select_queue	= ieee80211_monitor_select_queue,
+#if LINUX_VERSION_IS_GEQ(4,11,0)
+	.ndo_get_stats64	= ieee80211_get_stats64,
+#else
+	.ndo_get_stats64 = bp_ieee80211_get_stats64,
+#endif
+
+};
+
+static const struct net_device_ops ieee80211_dataif_8023_ops = {
+	.ndo_open		= ieee80211_open,
+	.ndo_stop		= ieee80211_stop,
+	.ndo_uninit		= ieee80211_uninit,
+	.ndo_start_xmit		= ieee80211_subif_start_xmit_8023,
+	.ndo_set_rx_mode	= ieee80211_set_multicast_list,
+	.ndo_set_mac_address	= ieee80211_change_mac,
+	.ndo_select_queue	= ieee80211_netdev_select_queue,
+#if LINUX_VERSION_IS_GEQ(4,11,0)
+	.ndo_get_stats64	= ieee80211_get_stats64,
+#else
+	.ndo_get_stats64 = bp_ieee80211_get_stats64,
+#endif
+
+};
+
 static bool ieee80211_iftype_supports_encap_offload(enum nl80211_iftype iftype)
 {
 	switch (iftype) {
@@ -389,6 +900,31 @@ static bool ieee80211_set_sdata_offload_
 	return true;
 }
 
+static void ieee80211_set_vif_encap_ops(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_sub_if_data *bss = sdata;
+	bool enabled;
+
+	if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
+		if (!sdata->bss)
+			return;
+
+		bss = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
+	}
+
+	if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) ||
+	    !ieee80211_iftype_supports_encap_offload(bss->vif.type))
+		return;
+
+	enabled = bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_ENABLED;
+	if (sdata->wdev.use_4addr &&
+	    !(bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_4ADDR))
+		enabled = false;
+
+	sdata->dev->netdev_ops = enabled ? &ieee80211_dataif_8023_ops :
+					   &ieee80211_dataif_ops;
+}
 
 static void ieee80211_recalc_sdata_offload(struct ieee80211_sub_if_data *sdata)
 {
@@ -866,518 +1402,6 @@ int ieee80211_do_open(struct wireless_de
 	return res;
 }
 
-static int ieee80211_open(struct net_device *dev)
-{
-	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
-	int err;
-
-	/* fail early if user set an invalid address */
-	if (!is_valid_ether_addr(dev->dev_addr))
-		return -EADDRNOTAVAIL;
-
-	err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
-	if (err)
-		return err;
-
-	return ieee80211_do_open(&sdata->wdev, true);
-}
-
-static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
-			      bool going_down)
-{
-	struct ieee80211_local *local = sdata->local;
-	unsigned long flags;
-	struct sk_buff *skb, *tmp;
-	u32 hw_reconf_flags = 0;
-	int i, flushed;
-	struct ps_data *ps;
-	struct cfg80211_chan_def chandef;
-	bool cancel_scan;
-	struct cfg80211_nan_func *func;
-
-	clear_bit(SDATA_STATE_RUNNING, &sdata->state);
-
-	cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
-	if (cancel_scan)
-		ieee80211_scan_cancel(local);
-
-	/*
-	 * Stop TX on this interface first.
-	 */
-	if (sdata->dev)
-		netif_tx_stop_all_queues(sdata->dev);
-
-	ieee80211_roc_purge(local, sdata);
-
-	switch (sdata->vif.type) {
-	case NL80211_IFTYPE_STATION:
-		ieee80211_mgd_stop(sdata);
-		break;
-	case NL80211_IFTYPE_ADHOC:
-		ieee80211_ibss_stop(sdata);
-		break;
-	case NL80211_IFTYPE_MONITOR:
-		if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
-			break;
-		list_del_rcu(&sdata->u.mntr.list);
-		break;
-	default:
-		break;
-	}
-
-	/*
-	 * Remove all stations associated with this interface.
-	 *
-	 * This must be done before calling ops->remove_interface()
-	 * because otherwise we can later invoke ops->sta_notify()
-	 * whenever the STAs are removed, and that invalidates driver
-	 * assumptions about always getting a vif pointer that is valid
-	 * (because if we remove a STA after ops->remove_interface()
-	 * the driver will have removed the vif info already!)
-	 *
-	 * In WDS mode a station must exist here and be flushed, for
-	 * AP_VLANs stations may exist since there's nothing else that
-	 * would have removed them, but in other modes there shouldn't
-	 * be any stations.
-	 */
-	flushed = sta_info_flush(sdata);
-	WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
-		     ((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
-		      (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1)));
-
-	/* don't count this interface for allmulti while it is down */
-	if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
-		atomic_dec(&local->iff_allmultis);
-
-	if (sdata->vif.type == NL80211_IFTYPE_AP) {
-		local->fif_pspoll--;
-		local->fif_probe_req--;
-	} else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
-		local->fif_probe_req--;
-	}
-
-	if (sdata->dev) {
-		netif_addr_lock_bh(sdata->dev);
-		spin_lock_bh(&local->filter_lock);
-		__hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
-				 sdata->dev->addr_len);
-		spin_unlock_bh(&local->filter_lock);
-		netif_addr_unlock_bh(sdata->dev);
-	}
-
-	del_timer_sync(&local->dynamic_ps_timer);
-	cancel_work_sync(&local->dynamic_ps_enable_work);
-
-	cancel_work_sync(&sdata->recalc_smps);
-	sdata_lock(sdata);
-	mutex_lock(&local->mtx);
-	sdata->vif.csa_active = false;
-	if (sdata->vif.type == NL80211_IFTYPE_STATION)
-		sdata->u.mgd.csa_waiting_bcn = false;
-	if (sdata->csa_block_tx) {
-		ieee80211_wake_vif_queues(local, sdata,
-					  IEEE80211_QUEUE_STOP_REASON_CSA);
-		sdata->csa_block_tx = false;
-	}
-	mutex_unlock(&local->mtx);
-	sdata_unlock(sdata);
-
-	cancel_work_sync(&sdata->csa_finalize_work);
-
-	cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
-
-	if (sdata->wdev.cac_started) {
-		chandef = sdata->vif.bss_conf.chandef;
-		WARN_ON(local->suspended);
-		mutex_lock(&local->mtx);
-		ieee80211_vif_release_channel(sdata);
-		mutex_unlock(&local->mtx);
-		cfg80211_cac_event(sdata->dev, &chandef,
-				   NL80211_RADAR_CAC_ABORTED,
-				   GFP_KERNEL);
-	}
-
-	/* APs need special treatment */
-	if (sdata->vif.type == NL80211_IFTYPE_AP) {
-		struct ieee80211_sub_if_data *vlan, *tmpsdata;
-
-		/* down all dependent devices, that is VLANs */
-		list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
-					 u.vlan.list)
-			dev_close(vlan->dev);
-		WARN_ON(!list_empty(&sdata->u.ap.vlans));
-	} else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
-		/* remove all packets in parent bc_buf pointing to this dev */
-		ps = &sdata->bss->ps;
-
-		spin_lock_irqsave(&ps->bc_buf.lock, flags);
-		skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
-			if (skb->dev == sdata->dev) {
-				__skb_unlink(skb, &ps->bc_buf);
-				local->total_ps_buffered--;
-				ieee80211_free_txskb(&local->hw, skb);
-			}
-		}
-		spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
-	}
-
-	if (going_down)
-		local->open_count--;
-
-	switch (sdata->vif.type) {
-	case NL80211_IFTYPE_AP_VLAN:
-		mutex_lock(&local->mtx);
-		list_del(&sdata->u.vlan.list);
-		mutex_unlock(&local->mtx);
-		RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
-		/* see comment in the default case below */
-		ieee80211_free_keys(sdata, true);
-		/* no need to tell driver */
-		break;
-	case NL80211_IFTYPE_MONITOR:
-		if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
-			local->cooked_mntrs--;
-			break;
-		}
-
-		local->monitors--;
-		if (local->monitors == 0) {
-			local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
-			hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
-		}
-
-		ieee80211_adjust_monitor_flags(sdata, -1);
-		break;
-	case NL80211_IFTYPE_NAN:
-		/* clean all the functions */
-		spin_lock_bh(&sdata->u.nan.func_lock);
-
-		idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) {
-			idr_remove(&sdata->u.nan.function_inst_ids, i);
-			cfg80211_free_nan_func(func);
-		}
-		idr_destroy(&sdata->u.nan.function_inst_ids);
-
-		spin_unlock_bh(&sdata->u.nan.func_lock);
-		break;
-	case NL80211_IFTYPE_P2P_DEVICE:
-		/* relies on synchronize_rcu() below */
-		RCU_INIT_POINTER(local->p2p_sdata, NULL);
-		fallthrough;
-	default:
-		cancel_work_sync(&sdata->work);
-		/*
-		 * When we get here, the interface is marked down.
-		 * Free the remaining keys, if there are any
-		 * (which can happen in AP mode if userspace sets
-		 * keys before the interface is operating, and maybe
-		 * also in WDS mode)
-		 *
-		 * Force the key freeing to always synchronize_net()
-		 * to wait for the RX path in case it is using this
-		 * interface enqueuing frames at this very time on
-		 * another CPU.
-		 */
-		ieee80211_free_keys(sdata, true);
-		skb_queue_purge(&sdata->skb_queue);
-	}
-
-	spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
-	for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
-		skb_queue_walk_safe(&local->pending[i], skb, tmp) {
-			struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
-			if (info->control.vif == &sdata->vif) {
-				__skb_unlink(skb, &local->pending[i]);
-				ieee80211_free_txskb(&local->hw, skb);
-			}
-		}
-	}
-	spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
-
-	if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
-		ieee80211_txq_remove_vlan(local, sdata);
-
-	sdata->bss = NULL;
-
-	if (local->open_count == 0)
-		ieee80211_clear_tx_pending(local);
-
-	sdata->vif.bss_conf.beacon_int = 0;
-
-	/*
-	 * If the interface goes down while suspended, presumably because
-	 * the device was unplugged and that happens before our resume,
-	 * then the driver is already unconfigured and the remainder of
-	 * this function isn't needed.
-	 * XXX: what about WoWLAN? If the device has software state, e.g.
-	 *	memory allocated, it might expect teardown commands from
-	 *	mac80211 here?
-	 */
-	if (local->suspended) {
-		WARN_ON(local->wowlan);
-		WARN_ON(rtnl_dereference(local->monitor_sdata));
-		return;
-	}
-
-	switch (sdata->vif.type) {
-	case NL80211_IFTYPE_AP_VLAN:
-		break;
-	case NL80211_IFTYPE_MONITOR:
-		if (local->monitors == 0)
-			ieee80211_del_virtual_monitor(local);
-
-		mutex_lock(&local->mtx);
-		ieee80211_recalc_idle(local);
-		mutex_unlock(&local->mtx);
-
-		if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
-			break;
-
-		fallthrough;
-	default:
-		if (going_down)
-			drv_remove_interface(local, sdata);
-	}
-
-	ieee80211_recalc_ps(local);
-
-	if (cancel_scan)
-		flush_delayed_work(&local->scan_work);
-
-	if (local->open_count == 0) {
-		ieee80211_stop_device(local);
-
-		/* no reconfiguring after stop! */
-		return;
-	}
-
-	/* do after stop to avoid reconfiguring when we stop anyway */
-	ieee80211_configure_filter(local);
-	ieee80211_hw_config(local, hw_reconf_flags);
-
-	if (local->monitors == local->open_count)
-		ieee80211_add_virtual_monitor(local);
-}
-
-static int ieee80211_stop(struct net_device *dev)
-{
-	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
-
-	ieee80211_do_stop(sdata, true);
-
-	return 0;
-}
-
-static void ieee80211_set_multicast_list(struct net_device *dev)
-{
-	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
-	struct ieee80211_local *local = sdata->local;
-	int allmulti, sdata_allmulti;
-
-	allmulti = !!(dev->flags & IFF_ALLMULTI);
-	sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
-
-	if (allmulti != sdata_allmulti) {
-		if (dev->flags & IFF_ALLMULTI)
-			atomic_inc(&local->iff_allmultis);
-		else
-			atomic_dec(&local->iff_allmultis);
-		sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
-	}
-
-	spin_lock_bh(&local->filter_lock);
-	__hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
-	spin_unlock_bh(&local->filter_lock);
-	ieee80211_queue_work(&local->hw, &local->reconfig_filter);
-}
-
-/*
- * Called when the netdev is removed or, by the code below, before
- * the interface type changes.
- */
-static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
-{
-	int i;
-
-	/* free extra data */
-	ieee80211_free_keys(sdata, false);
-
-	ieee80211_debugfs_remove_netdev(sdata);
-
-	for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
-		__skb_queue_purge(&sdata->fragments[i].skb_list);
-	sdata->fragment_next = 0;
-
-	if (ieee80211_vif_is_mesh(&sdata->vif))
-		ieee80211_mesh_teardown_sdata(sdata);
-}
-
-static void ieee80211_uninit(struct net_device *dev)
-{
-	ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
-}
-
-#if LINUX_VERSION_IS_GEQ(5,2,0)
-static u16 ieee80211_netdev_select_queue(struct net_device *dev,
-					 struct sk_buff *skb,
-					 struct net_device *sb_dev)
-#elif LINUX_VERSION_IS_GEQ(4,19,0)
-static u16 ieee80211_netdev_select_queue(struct net_device *dev,
-					 struct sk_buff *skb,
-					 struct net_device *sb_dev,
-					 select_queue_fallback_t fallback)
-#elif LINUX_VERSION_IS_GEQ(3,14,0) || \
-    (LINUX_VERSION_CODE == KERNEL_VERSION(3,13,11) && UTS_UBUNTU_RELEASE_ABI > 30)
-static u16 ieee80211_netdev_select_queue(struct net_device *dev,
-					 struct sk_buff *skb,
-					 void *accel_priv,
-					 select_queue_fallback_t fallback)
-#elif LINUX_VERSION_IS_GEQ(3,13,0)
-static u16 ieee80211_netdev_select_queue(struct net_device *dev,
-					 struct sk_buff *skb,
-					 void *accel_priv)
-#else
-static u16 ieee80211_netdev_select_queue(struct net_device *dev,
-					 struct sk_buff *skb)
-#endif
-{
-	return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
-}
-
-static void
-ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
-{
-	int i;
-
-	for_each_possible_cpu(i) {
-		const struct pcpu_sw_netstats *tstats;
-		u64 rx_packets, rx_bytes, tx_packets, tx_bytes;
-		unsigned int start;
-
-		tstats = per_cpu_ptr(netdev_tstats(dev), i);
-
-		do {
-			start = u64_stats_fetch_begin_irq(&tstats->syncp);
-			rx_packets = tstats->rx_packets;
-			tx_packets = tstats->tx_packets;
-			rx_bytes = tstats->rx_bytes;
-			tx_bytes = tstats->tx_bytes;
-		} while (u64_stats_fetch_retry_irq(&tstats->syncp, start));
-
-		stats->rx_packets += rx_packets;
-		stats->tx_packets += tx_packets;
-		stats->rx_bytes   += rx_bytes;
-		stats->tx_bytes   += tx_bytes;
-	}
-}
-#if LINUX_VERSION_IS_LESS(4,11,0)
-/* Just declare it here to keep sparse happy */
-struct rtnl_link_stats64 *bp_ieee80211_get_stats64(struct net_device *dev,
-						   struct rtnl_link_stats64 *stats);
-struct rtnl_link_stats64 *
-bp_ieee80211_get_stats64(struct net_device *dev,
-			 struct rtnl_link_stats64 *stats){
-	ieee80211_get_stats64(dev, stats);
-	return stats;
-}
-#endif
-
-static const struct net_device_ops ieee80211_dataif_ops = {
-	.ndo_open		= ieee80211_open,
-	.ndo_stop		= ieee80211_stop,
-	.ndo_uninit		= ieee80211_uninit,
-	.ndo_start_xmit		= ieee80211_subif_start_xmit,
-	.ndo_set_rx_mode	= ieee80211_set_multicast_list,
-	.ndo_set_mac_address 	= ieee80211_change_mac,
-	.ndo_select_queue	= ieee80211_netdev_select_queue,
-#if LINUX_VERSION_IS_GEQ(4,11,0)
-	.ndo_get_stats64	= ieee80211_get_stats64,
-#else
-	.ndo_get_stats64 = bp_ieee80211_get_stats64,
-#endif
-
-};
-
-#if LINUX_VERSION_IS_GEQ(5,2,0)
-static u16 ieee80211_monitor_select_queue(struct net_device *dev,
-					  struct sk_buff *skb,
-					  struct net_device *sb_dev)
-#elif LINUX_VERSION_IS_GEQ(4,19,0)
-static u16 ieee80211_monitor_select_queue(struct net_device *dev,
-					  struct sk_buff *skb,
-					  struct net_device *sb_dev,
-					  select_queue_fallback_t fallback)
-#elif LINUX_VERSION_IS_GEQ(3,14,0) || \
-    (LINUX_VERSION_CODE == KERNEL_VERSION(3,13,11) && UTS_UBUNTU_RELEASE_ABI > 30)
-static u16 ieee80211_monitor_select_queue(struct net_device *dev,
-					  struct sk_buff *skb,
-					  void *accel_priv,
-					  select_queue_fallback_t fallback)
-#elif LINUX_VERSION_IS_GEQ(3,13,0)
-static u16 ieee80211_monitor_select_queue(struct net_device *dev,
-					  struct sk_buff *skb,
-					  void *accel_priv)
-#else
-static u16 ieee80211_monitor_select_queue(struct net_device *dev,
-					  struct sk_buff *skb)
-#endif
-{
-	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
-	struct ieee80211_local *local = sdata->local;
-	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
-	struct ieee80211_hdr *hdr;
-	int len_rthdr;
-
-	if (local->hw.queues < IEEE80211_NUM_ACS)
-		return 0;
-
-	/* reset flags and info before parsing radiotap header */
-	memset(info, 0, sizeof(*info));
-
-	if (!ieee80211_parse_tx_radiotap(skb, dev))
-		return 0; /* doesn't matter, frame will be dropped */
-
-	len_rthdr = ieee80211_get_radiotap_len(skb->data);
-	hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
-	if (skb->len < len_rthdr + 2 ||
-	    skb->len < len_rthdr + ieee80211_hdrlen(hdr->frame_control))
-		return 0; /* doesn't matter, frame will be dropped */
-
-	return ieee80211_select_queue_80211(sdata, skb, hdr);
-}
-
-static const struct net_device_ops ieee80211_monitorif_ops = {
-	.ndo_open		= ieee80211_open,
-	.ndo_stop		= ieee80211_stop,
-	.ndo_uninit		= ieee80211_uninit,
-	.ndo_start_xmit		= ieee80211_monitor_start_xmit,
-	.ndo_set_rx_mode	= ieee80211_set_multicast_list,
-	.ndo_set_mac_address 	= ieee80211_change_mac,
-	.ndo_select_queue	= ieee80211_monitor_select_queue,
-#if LINUX_VERSION_IS_GEQ(4,11,0)
-	.ndo_get_stats64	= ieee80211_get_stats64,
-#else
-	.ndo_get_stats64 = bp_ieee80211_get_stats64,
-#endif
-
-};
-
-static const struct net_device_ops ieee80211_dataif_8023_ops = {
-	.ndo_open		= ieee80211_open,
-	.ndo_stop		= ieee80211_stop,
-	.ndo_uninit		= ieee80211_uninit,
-	.ndo_start_xmit		= ieee80211_subif_start_xmit_8023,
-	.ndo_set_rx_mode	= ieee80211_set_multicast_list,
-	.ndo_set_mac_address	= ieee80211_change_mac,
-	.ndo_select_queue	= ieee80211_netdev_select_queue,
-#if LINUX_VERSION_IS_GEQ(4,11,0)
-	.ndo_get_stats64	= ieee80211_get_stats64,
-#else
-	.ndo_get_stats64 = bp_ieee80211_get_stats64,
-#endif
-
-};
-
 static void ieee80211_if_free(struct net_device *dev)
 {
 	free_percpu(netdev_tstats(dev));
@@ -1408,32 +1432,6 @@ static void ieee80211_if_setup_no_queue(
 #endif
 }
 
-static void ieee80211_set_vif_encap_ops(struct ieee80211_sub_if_data *sdata)
-{
-	struct ieee80211_local *local = sdata->local;
-	struct ieee80211_sub_if_data *bss = sdata;
-	bool enabled;
-
-	if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
-		if (!sdata->bss)
-			return;
-
-		bss = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
-	}
-
-	if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) ||
-	    !ieee80211_iftype_supports_encap_offload(bss->vif.type))
-		return;
-
-	enabled = bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_ENABLED;
-	if (sdata->wdev.use_4addr &&
-	    !(bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_4ADDR))
-		enabled = false;
-
-	sdata->dev->netdev_ops = enabled ? &ieee80211_dataif_8023_ops :
-					   &ieee80211_dataif_ops;
-}
-
 static void ieee80211_iface_work(struct work_struct *work)
 {
 	struct ieee80211_sub_if_data *sdata =