mac80211: move regular interface handling (0d143fe1) · Commits · e / devices / android_kernel_sony_msm8998

net/mac80211/ieee80211_i.h

+1 −1

Original line number	Original line	Diff line number	Diff line
	@@ -891,6 +891,7 @@ u32 ieee80211_handle_ht(struct ieee80211_local *local, int enable_ht,
	struct ieee80211_ht_bss_info *req_bss_cap);		struct ieee80211_ht_bss_info *req_bss_cap);
	void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,		void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
	u32 changed);		u32 changed);
			void ieee80211_configure_filter(struct ieee80211_local *local);

	/* wireless extensions */		/* wireless extensions */
	extern const struct iw_handler_def ieee80211_iw_handler_def;		extern const struct iw_handler_def ieee80211_iw_handler_def;
	@@ -952,7 +953,6 @@ void ieee80211_rx_bss_put(struct ieee80211_local *local,
	struct ieee80211_bss *bss);		struct ieee80211_bss *bss);

	/* interface handling */		/* interface handling */
	void ieee80211_if_setup(struct net_device *dev);
	int ieee80211_if_add(struct ieee80211_local local, const char name,		int ieee80211_if_add(struct ieee80211_local local, const char name,
	struct net_device **new_dev, enum nl80211_iftype type,		struct net_device **new_dev, enum nl80211_iftype type,
	struct vif_params *params);		struct vif_params *params);

net/mac80211/iface.c

+534 −0

Original line number	Original line	Diff line number	Diff line
	/*		/*
			* Interface handling (except master interface)
			*
	* Copyright 2002-2005, Instant802 Networks, Inc.		* Copyright 2002-2005, Instant802 Networks, Inc.
	* Copyright 2005-2006, Devicescape Software, Inc.		* Copyright 2005-2006, Devicescape Software, Inc.
	* Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>		* Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
	@@ -17,7 +19,539 @@
	#include "sta_info.h"		#include "sta_info.h"
	#include "debugfs_netdev.h"		#include "debugfs_netdev.h"
	#include "mesh.h"		#include "mesh.h"
			#include "led.h"

			static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
			{
			int meshhdrlen;
			struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);

			meshhdrlen = (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) ? 5 : 0;

			/* FIX: what would be proper limits for MTU?
			* This interface uses 802.3 frames. */
			if (new_mtu < 256 \|\|
			new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) {
			return -EINVAL;
			}

			#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
			printk(KERN_DEBUG "%s: setting MTU %d\n", dev->name, new_mtu);
			#endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
			dev->mtu = new_mtu;
			return 0;
			}

			static inline int identical_mac_addr_allowed(int type1, int type2)
			{
			return type1 == NL80211_IFTYPE_MONITOR \|\|
			type2 == NL80211_IFTYPE_MONITOR \|\|
			(type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) \|\|
			(type1 == NL80211_IFTYPE_WDS &&
			(type2 == NL80211_IFTYPE_WDS \|\|
			type2 == NL80211_IFTYPE_AP)) \|\|
			(type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) \|\|
			(type1 == NL80211_IFTYPE_AP_VLAN &&
			(type2 == NL80211_IFTYPE_AP \|\|
			type2 == NL80211_IFTYPE_AP_VLAN));
			}

			static int ieee80211_open(struct net_device *dev)
			{
			struct ieee80211_sub_if_data sdata, nsdata;
			struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
			struct sta_info *sta;
			struct ieee80211_if_init_conf conf;
			u32 changed = 0;
			int res;
			bool need_hw_reconfig = 0;
			u8 null_addr[ETH_ALEN] = {0};

			sdata = IEEE80211_DEV_TO_SUB_IF(dev);

			/* fail early if user set an invalid address */
			if (compare_ether_addr(dev->dev_addr, null_addr) &&
			!is_valid_ether_addr(dev->dev_addr))
			return -EADDRNOTAVAIL;

			/* we hold the RTNL here so can safely walk the list */
			list_for_each_entry(nsdata, &local->interfaces, list) {
			struct net_device *ndev = nsdata->dev;

			if (ndev != dev && netif_running(ndev)) {
			/*
			* Allow only a single IBSS interface to be up at any
			* time. This is restricted because beacon distribution
			* cannot work properly if both are in the same IBSS.
			*
			* To remove this restriction we'd have to disallow them
			* from setting the same SSID on different IBSS interfaces
			* belonging to the same hardware. Then, however, we're
			* faced with having to adopt two different TSF timers...
			*/
			if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
			nsdata->vif.type == NL80211_IFTYPE_ADHOC)
			return -EBUSY;

			/*
			* The remaining checks are only performed for interfaces
			* with the same MAC address.
			*/
			if (compare_ether_addr(dev->dev_addr, ndev->dev_addr))
			continue;

			/*
			* check whether it may have the same address
			*/
			if (!identical_mac_addr_allowed(sdata->vif.type,
			nsdata->vif.type))
			return -ENOTUNIQ;

			/*
			* can only add VLANs to enabled APs
			*/
			if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN &&
			nsdata->vif.type == NL80211_IFTYPE_AP)
			sdata->bss = &nsdata->u.ap;
			}
			}

			switch (sdata->vif.type) {
			case NL80211_IFTYPE_WDS:
			if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
			return -ENOLINK;
			break;
			case NL80211_IFTYPE_AP_VLAN:
			if (!sdata->bss)
			return -ENOLINK;
			list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
			break;
			case NL80211_IFTYPE_AP:
			sdata->bss = &sdata->u.ap;
			break;
			case NL80211_IFTYPE_MESH_POINT:
			if (!ieee80211_vif_is_mesh(&sdata->vif))
			break;
			/* mesh ifaces must set allmulti to forward mcast traffic */
			atomic_inc(&local->iff_allmultis);
			break;
			case NL80211_IFTYPE_STATION:
			case NL80211_IFTYPE_MONITOR:
			case NL80211_IFTYPE_ADHOC:
			/* no special treatment */
			break;
			case NL80211_IFTYPE_UNSPECIFIED:
			case __NL80211_IFTYPE_AFTER_LAST:
			/* cannot happen */
			WARN_ON(1);
			break;
			}

			if (local->open_count == 0) {
			res = 0;
			if (local->ops->start)
			res = local->ops->start(local_to_hw(local));
			if (res)
			goto err_del_bss;
			need_hw_reconfig = 1;
			ieee80211_led_radio(local, local->hw.conf.radio_enabled);
			}

			/*
			* Check all interfaces and copy the hopefully now-present
			* MAC address to those that have the special null one.
			*/
			list_for_each_entry(nsdata, &local->interfaces, list) {
			struct net_device *ndev = nsdata->dev;

			/*
			* No need to check netif_running since we do not allow
			* it to start up with this invalid address.
			*/
			if (compare_ether_addr(null_addr, ndev->dev_addr) == 0)
			memcpy(ndev->dev_addr,
			local->hw.wiphy->perm_addr,
			ETH_ALEN);
			}

			if (compare_ether_addr(null_addr, local->mdev->dev_addr) == 0)
			memcpy(local->mdev->dev_addr, local->hw.wiphy->perm_addr,
			ETH_ALEN);

			/*
			* Validate the MAC address for this device.
			*/
			if (!is_valid_ether_addr(dev->dev_addr)) {
			if (!local->open_count && local->ops->stop)
			local->ops->stop(local_to_hw(local));
			return -EADDRNOTAVAIL;
			}

			switch (sdata->vif.type) {
			case NL80211_IFTYPE_AP_VLAN:
			/* no need to tell driver */
			break;
			case NL80211_IFTYPE_MONITOR:
			if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
			local->cooked_mntrs++;
			break;
			}

			/* must be before the call to ieee80211_configure_filter */
			local->monitors++;
			if (local->monitors == 1)
			local->hw.conf.flags \|= IEEE80211_CONF_RADIOTAP;

			if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
			local->fif_fcsfail++;
			if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
			local->fif_plcpfail++;
			if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL)
			local->fif_control++;
			if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
			local->fif_other_bss++;

			netif_addr_lock_bh(local->mdev);
			ieee80211_configure_filter(local);
			netif_addr_unlock_bh(local->mdev);
			break;
			case NL80211_IFTYPE_STATION:
			case NL80211_IFTYPE_ADHOC:
			sdata->u.sta.flags &= ~IEEE80211_STA_PREV_BSSID_SET;
			/* fall through */
			default:
			conf.vif = &sdata->vif;
			conf.type = sdata->vif.type;
			conf.mac_addr = dev->dev_addr;
			res = local->ops->add_interface(local_to_hw(local), &conf);
			if (res)
			goto err_stop;

			if (ieee80211_vif_is_mesh(&sdata->vif))
			ieee80211_start_mesh(sdata);
			changed \|= ieee80211_reset_erp_info(sdata);
			ieee80211_bss_info_change_notify(sdata, changed);
			ieee80211_enable_keys(sdata);

			if (sdata->vif.type == NL80211_IFTYPE_STATION &&
			!(sdata->flags & IEEE80211_SDATA_USERSPACE_MLME))
			netif_carrier_off(dev);
			else
			netif_carrier_on(dev);
			}

			if (sdata->vif.type == NL80211_IFTYPE_WDS) {
			/* Create STA entry for the WDS peer */
			sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
			GFP_KERNEL);
			if (!sta) {
			res = -ENOMEM;
			goto err_del_interface;
			}

			/* no locking required since STA is not live yet */
			sta->flags \|= WLAN_STA_AUTHORIZED;

			res = sta_info_insert(sta);
			if (res) {
			/* STA has been freed */
			goto err_del_interface;
			}
			}

			if (local->open_count == 0) {
			res = dev_open(local->mdev);
			WARN_ON(res);
			if (res)
			goto err_del_interface;
			tasklet_enable(&local->tx_pending_tasklet);
			tasklet_enable(&local->tasklet);
			}

			/*
			* set_multicast_list will be invoked by the networking core
			* which will check whether any increments here were done in
			* error and sync them down to the hardware as filter flags.
			*/
			if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
			atomic_inc(&local->iff_allmultis);

			if (sdata->flags & IEEE80211_SDATA_PROMISC)
			atomic_inc(&local->iff_promiscs);

			local->open_count++;
			if (need_hw_reconfig) {
			ieee80211_hw_config(local);
			/*
			* set default queue parameters so drivers don't
			* need to initialise the hardware if the hardware
			* doesn't start up with sane defaults
			*/
			ieee80211_set_wmm_default(sdata);
			}

			/*
			* ieee80211_sta_work is disabled while network interface
			* is down. Therefore, some configuration changes may not
			* yet be effective. Trigger execution of ieee80211_sta_work
			* to fix this.
			*/
			if (sdata->vif.type == NL80211_IFTYPE_STATION \|\|
			sdata->vif.type == NL80211_IFTYPE_ADHOC) {
			struct ieee80211_if_sta *ifsta = &sdata->u.sta;
			queue_work(local->hw.workqueue, &ifsta->work);
			}

			netif_tx_start_all_queues(dev);

			return 0;
			err_del_interface:
			local->ops->remove_interface(local_to_hw(local), &conf);
			err_stop:
			if (!local->open_count && local->ops->stop)
			local->ops->stop(local_to_hw(local));
			err_del_bss:
			sdata->bss = NULL;
			if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
			list_del(&sdata->u.vlan.list);
			return res;
			}

			static int ieee80211_stop(struct net_device *dev)
			{
			struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
			struct ieee80211_local *local = sdata->local;
			struct ieee80211_if_init_conf conf;
			struct sta_info *sta;

			/*
			* Stop TX on this interface first.
			*/
			netif_tx_stop_all_queues(dev);

			/*
			* Now delete all active aggregation sessions.
			*/
			rcu_read_lock();

			list_for_each_entry_rcu(sta, &local->sta_list, list) {
			if (sta->sdata == sdata)
			ieee80211_sta_tear_down_BA_sessions(sdata, sta->addr);
			}

			rcu_read_unlock();

			/*
			* 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!)
			*
			* We could relax this and only unlink the stations from the
			* hash table and list but keep them on a per-sdata list that
			* will be inserted back again when the interface is brought
			* up again, but I don't currently see a use case for that,
			* except with WDS which gets a STA entry created when it is
			* brought up.
			*/
			sta_info_flush(local, sdata);

			/*
			* Don't count this interface for promisc/allmulti while it
			* is down. dev_mc_unsync() will invoke set_multicast_list
			* on the master interface which will sync these down to the
			* hardware as filter flags.
			*/
			if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
			atomic_dec(&local->iff_allmultis);

			if (sdata->flags & IEEE80211_SDATA_PROMISC)
			atomic_dec(&local->iff_promiscs);

			dev_mc_unsync(local->mdev, dev);

			/* APs need special treatment */
			if (sdata->vif.type == NL80211_IFTYPE_AP) {
			struct ieee80211_sub_if_data vlan, tmp;
			struct beacon_data *old_beacon = sdata->u.ap.beacon;

			/* remove beacon */
			rcu_assign_pointer(sdata->u.ap.beacon, NULL);
			synchronize_rcu();
			kfree(old_beacon);

			/* down all dependent devices, that is VLANs */
			list_for_each_entry_safe(vlan, tmp, &sdata->u.ap.vlans,
			u.vlan.list)
			dev_close(vlan->dev);
			WARN_ON(!list_empty(&sdata->u.ap.vlans));
			}

			local->open_count--;

			switch (sdata->vif.type) {
			case NL80211_IFTYPE_AP_VLAN:
			list_del(&sdata->u.vlan.list);
			/* 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_RADIOTAP;

			if (sdata->u.mntr_flags & MONITOR_FLAG_FCSFAIL)
			local->fif_fcsfail--;
			if (sdata->u.mntr_flags & MONITOR_FLAG_PLCPFAIL)
			local->fif_plcpfail--;
			if (sdata->u.mntr_flags & MONITOR_FLAG_CONTROL)
			local->fif_control--;
			if (sdata->u.mntr_flags & MONITOR_FLAG_OTHER_BSS)
			local->fif_other_bss--;

			netif_addr_lock_bh(local->mdev);
			ieee80211_configure_filter(local);
			netif_addr_unlock_bh(local->mdev);
			break;
			case NL80211_IFTYPE_STATION:
			case NL80211_IFTYPE_ADHOC:
			sdata->u.sta.state = IEEE80211_STA_MLME_DISABLED;
			memset(sdata->u.sta.bssid, 0, ETH_ALEN);
			del_timer_sync(&sdata->u.sta.timer);
			/*
			* If the timer fired while we waited for it, it will have
			* requeued the work. Now the work will be running again
			* but will not rearm the timer again because it checks
			* whether the interface is running, which, at this point,
			* it no longer is.
			*/
			cancel_work_sync(&sdata->u.sta.work);
			/*
			* When we get here, the interface is marked down.
			* Call synchronize_rcu() to wait for the RX path
			* should it be using the interface and enqueuing
			* frames at this very time on another CPU.
			*/
			synchronize_rcu();
			skb_queue_purge(&sdata->u.sta.skb_queue);

			sdata->u.sta.flags &= ~IEEE80211_STA_PRIVACY_INVOKED;
			kfree(sdata->u.sta.extra_ie);
			sdata->u.sta.extra_ie = NULL;
			sdata->u.sta.extra_ie_len = 0;
			/* fall through */
			case NL80211_IFTYPE_MESH_POINT:
			if (ieee80211_vif_is_mesh(&sdata->vif)) {
			/* allmulti is always set on mesh ifaces */
			atomic_dec(&local->iff_allmultis);
			ieee80211_stop_mesh(sdata);
			}
			/* fall through */
			default:
			if (local->scan_sdata == sdata) {
			if (!local->ops->hw_scan)
			cancel_delayed_work_sync(&local->scan_work);
			/*
			* The software scan can no longer run now, so we can
			* clear out the scan_sdata reference. However, the
			* hardware scan may still be running. The complete
			* function must be prepared to handle a NULL value.
			*/
			local->scan_sdata = NULL;
			/*
			* The memory barrier guarantees that another CPU
			* that is hardware-scanning will now see the fact
			* that this interface is gone.
			*/
			smp_mb();
			/*
			* If software scanning, complete the scan but since
			* the scan_sdata is NULL already don't send out a
			* scan event to userspace -- the scan is incomplete.
			*/
			if (local->sw_scanning)
			ieee80211_scan_completed(&local->hw);
			}

			conf.vif = &sdata->vif;
			conf.type = sdata->vif.type;
			conf.mac_addr = dev->dev_addr;
			/* disable all keys for as long as this netdev is down */
			ieee80211_disable_keys(sdata);
			local->ops->remove_interface(local_to_hw(local), &conf);
			}

			sdata->bss = NULL;

			if (local->open_count == 0) {
			if (netif_running(local->mdev))
			dev_close(local->mdev);

			if (local->ops->stop)
			local->ops->stop(local_to_hw(local));

			ieee80211_led_radio(local, 0);

			flush_workqueue(local->hw.workqueue);

			tasklet_disable(&local->tx_pending_tasklet);
			tasklet_disable(&local->tasklet);
			}

			return 0;
			}

			static void ieee80211_set_multicast_list(struct net_device *dev)
			{
			struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
			struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
			int allmulti, promisc, sdata_allmulti, sdata_promisc;

			allmulti = !!(dev->flags & IFF_ALLMULTI);
			promisc = !!(dev->flags & IFF_PROMISC);
			sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
			sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);

			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;
			}

			if (promisc != sdata_promisc) {
			if (dev->flags & IFF_PROMISC)
			atomic_inc(&local->iff_promiscs);
			else
			atomic_dec(&local->iff_promiscs);
			sdata->flags ^= IEEE80211_SDATA_PROMISC;
			}

			dev_mc_sync(local->mdev, dev);
			}

			static void ieee80211_if_setup(struct net_device *dev)
			{
			ether_setup(dev);
			dev->hard_start_xmit = ieee80211_subif_start_xmit;
			dev->wireless_handlers = &ieee80211_iw_handler_def;
			dev->set_multicast_list = ieee80211_set_multicast_list;
			dev->change_mtu = ieee80211_change_mtu;
			dev->open = ieee80211_open;
			dev->stop = ieee80211_stop;
			dev->destructor = free_netdev;
			/* we will validate the address ourselves in ->open */
			dev->validate_addr = NULL;
			}
	/*		/*
	* Called when the netdev is removed or, by the code below, before		* Called when the netdev is removed or, by the code below, before
	* the interface type changes.		* the interface type changes.

net/mac80211/main.c

+15 −550

File changed.

Preview size limit exceeded, changes collapsed.