Merge remote-tracking branch 'mac80211/master' into HEAD

There are a few things that would otherwise conflict.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

net/mac80211/cfg.c

@@ -3285,6 +3285,7 @@ static int ieee80211_cfg_get_channel(struct wiphy *wiphy,
 				     struct cfg80211_chan_def *chandef)
 {
 	struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
+	struct ieee80211_local *local = wiphy_priv(wiphy);
 	struct ieee80211_chanctx_conf *chanctx_conf;
 	int ret = -ENODATA;
 
@@ -3293,6 +3294,16 @@ static int ieee80211_cfg_get_channel(struct wiphy *wiphy,
 	if (chanctx_conf) {
 		*chandef = chanctx_conf->def;
 		ret = 0;
+	} else if (local->open_count > 0 &&
+		   local->open_count == local->monitors &&
+		   sdata->vif.type == NL80211_IFTYPE_MONITOR) {
+		if (local->use_chanctx)
+			*chandef = local->monitor_chandef;
+		else
+			cfg80211_chandef_create(chandef,
+						local->_oper_channel,
+						local->_oper_channel_type);
+		ret = 0;
 	}
 	rcu_read_unlock();
 

net/mac80211/iface.c

@@ -107,7 +107,7 @@ void ieee80211_recalc_idle(struct ieee80211_local *local)
 
 	lockdep_assert_held(&local->mtx);
 
-	active = !list_empty(&local->chanctx_list);
+	active = !list_empty(&local->chanctx_list) || local->monitors;
 
 	if (!local->ops->remain_on_channel) {
 		list_for_each_entry(roc, &local->roc_list, list) {
@@ -541,6 +541,9 @@ int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
 
 		ieee80211_adjust_monitor_flags(sdata, 1);
 		ieee80211_configure_filter(local);
+		mutex_lock(&local->mtx);
+		ieee80211_recalc_idle(local);
+		mutex_unlock(&local->mtx);
 
 		netif_carrier_on(dev);
 		break;
@@ -812,6 +815,9 @@ static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
 
 		ieee80211_adjust_monitor_flags(sdata, -1);
 		ieee80211_configure_filter(local);
+		mutex_lock(&local->mtx);
+		ieee80211_recalc_idle(local);
+		mutex_unlock(&local->mtx);
 		break;
 	case NL80211_IFTYPE_P2P_DEVICE:
 		/* relies on synchronize_rcu() below */

net/mac80211/mlme.c

@@ -647,6 +647,9 @@ static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
 		our_mcs = (le16_to_cpu(vht_cap.vht_mcs.rx_mcs_map) &
 								mask) >> shift;
 
+		if (our_mcs == IEEE80211_VHT_MCS_NOT_SUPPORTED)
+			continue;
+
 		switch (ap_mcs) {
 		default:
 			if (our_mcs <= ap_mcs)
@@ -3502,6 +3505,14 @@ void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
 {
 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 
+	/*
+	 * Stop timers before deleting work items, as timers
+	 * could race and re-add the work-items. They will be
+	 * re-established on connection.
+	 */
+	del_timer_sync(&ifmgd->conn_mon_timer);
+	del_timer_sync(&ifmgd->bcn_mon_timer);
+
 	/*
 	 * we need to use atomic bitops for the running bits
 	 * only because both timers might fire at the same
@@ -3516,13 +3527,9 @@ void ieee80211_sta_quiesce(struct ieee80211_sub_if_data *sdata)
 	if (del_timer_sync(&ifmgd->timer))
 		set_bit(TMR_RUNNING_TIMER, &ifmgd->timers_running);
 
-	cancel_work_sync(&ifmgd->chswitch_work);
 	if (del_timer_sync(&ifmgd->chswitch_timer))
 		set_bit(TMR_RUNNING_CHANSW, &ifmgd->timers_running);
-
-	/* these will just be re-established on connection */
-	del_timer_sync(&ifmgd->conn_mon_timer);
-	del_timer_sync(&ifmgd->bcn_mon_timer);
+	cancel_work_sync(&ifmgd->chswitch_work);
 }
 
 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
@@ -4315,6 +4322,17 @@ void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
 {
 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 
+	/*
+	 * Make sure some work items will not run after this,
+	 * they will not do anything but might not have been
+	 * cancelled when disconnecting.
+	 */
+	cancel_work_sync(&ifmgd->monitor_work);
+	cancel_work_sync(&ifmgd->beacon_connection_loss_work);
+	cancel_work_sync(&ifmgd->request_smps_work);
+	cancel_work_sync(&ifmgd->csa_connection_drop_work);
+	cancel_work_sync(&ifmgd->chswitch_work);
+
 	mutex_lock(&ifmgd->mtx);
 	if (ifmgd->assoc_data)
 		ieee80211_destroy_assoc_data(sdata, false);

net/mac80211/tx.c

@@ -1231,27 +1231,32 @@ static bool ieee80211_tx_frags(struct ieee80211_local *local,
 		if (local->queue_stop_reasons[q] ||
 		    (!txpending && !skb_queue_empty(&local->pending[q]))) {
 			if (unlikely(info->flags &
-					IEEE80211_TX_INTFL_OFFCHAN_TX_OK &&
-				     local->queue_stop_reasons[q] &
-					~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL))) {
+				     IEEE80211_TX_INTFL_OFFCHAN_TX_OK)) {
+				if (local->queue_stop_reasons[q] &
+				    ~BIT(IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL)) {
 					/*
-				 * Drop off-channel frames if queues are stopped
-				 * for any reason other than off-channel
-				 * operation. Never queue them.
+					 * Drop off-channel frames if queues
+					 * are stopped for any reason other
+					 * than off-channel operation. Never
+					 * queue them.
 					 */
 					spin_unlock_irqrestore(
-					&local->queue_stop_reason_lock, flags);
-				ieee80211_purge_tx_queue(&local->hw, skbs);
+						&local->queue_stop_reason_lock,
+						flags);
+					ieee80211_purge_tx_queue(&local->hw,
+								 skbs);
 					return true;
 				}
+			} else {
 
 				/*
-			 * Since queue is stopped, queue up frames for later
-			 * transmission from the tx-pending tasklet when the
-			 * queue is woken again.
+				 * Since queue is stopped, queue up frames for
+				 * later transmission from the tx-pending
+				 * tasklet when the queue is woken again.
 				 */
 				if (txpending)
-				skb_queue_splice_init(skbs, &local->pending[q]);
+					skb_queue_splice_init(skbs,
+							      &local->pending[q]);
 				else
 					skb_queue_splice_tail_init(skbs,
 								   &local->pending[q]);
@@ -1260,6 +1265,7 @@ static bool ieee80211_tx_frags(struct ieee80211_local *local,
 						       flags);
 				return false;
 			}
+		}
 		spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
 
 		info->control.vif = vif;
@@ -1844,9 +1850,24 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
 		}
 
 		if (!is_multicast_ether_addr(skb->data)) {
+			struct sta_info *next_hop;
+			bool mpp_lookup = true;
+
 			mpath = mesh_path_lookup(sdata, skb->data);
-			if (!mpath)
+			if (mpath) {
+				mpp_lookup = false;
+				next_hop = rcu_dereference(mpath->next_hop);
+				if (!next_hop ||
+				    !(mpath->flags & (MESH_PATH_ACTIVE |
+						      MESH_PATH_RESOLVING)))
+					mpp_lookup = true;
+			}
+
+			if (mpp_lookup)
 				mppath = mpp_path_lookup(sdata, skb->data);
+
+			if (mppath && mpath)
+				mesh_path_del(mpath->sdata, mpath->dst);
 		}
 
 		/*
@@ -2350,9 +2371,9 @@ static int ieee80211_beacon_add_tim(struct ieee80211_sub_if_data *sdata,
 	if (local->tim_in_locked_section) {
 		__ieee80211_beacon_add_tim(sdata, ps, skb);
 	} else {
-		spin_lock(&local->tim_lock);
+		spin_lock_bh(&local->tim_lock);
 		__ieee80211_beacon_add_tim(sdata, ps, skb);
-		spin_unlock(&local->tim_lock);
+		spin_unlock_bh(&local->tim_lock);
 	}
 
 	return 0;
@@ -2724,6 +2745,7 @@ ieee80211_get_buffered_bc(struct ieee80211_hw *hw,
 				cpu_to_le16(IEEE80211_FCTL_MOREDATA);
 		}
 
+		if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
 			sdata = IEEE80211_DEV_TO_SUB_IF(skb->dev);
 		if (!ieee80211_tx_prepare(sdata, &tx, skb))
 			break;

net/wireless/core.c

@@ -367,8 +367,7 @@ struct wiphy *wiphy_new(const struct cfg80211_ops *ops, int sizeof_priv)
 	rdev->wiphy.rts_threshold = (u32) -1;
 	rdev->wiphy.coverage_class = 0;
 
-	rdev->wiphy.features = NL80211_FEATURE_SCAN_FLUSH |
-			       NL80211_FEATURE_ADVERTISE_CHAN_LIMITS;
+	rdev->wiphy.features = NL80211_FEATURE_SCAN_FLUSH;
 
 	return &rdev->wiphy;
 }

net/wireless/nl80211.c

@@ -554,27 +554,8 @@ static int nl80211_msg_put_channel(struct sk_buff *msg,
 	if ((chan->flags & IEEE80211_CHAN_NO_IBSS) &&
 	    nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IBSS))
 		goto nla_put_failure;
-	if (chan->flags & IEEE80211_CHAN_RADAR) {
-		u32 time = elapsed_jiffies_msecs(chan->dfs_state_entered);
-		if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
-			goto nla_put_failure;
-		if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_STATE,
-				chan->dfs_state))
-			goto nla_put_failure;
-		if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_TIME, time))
-			goto nla_put_failure;
-	}
-	if ((chan->flags & IEEE80211_CHAN_NO_HT40MINUS) &&
-	    nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_MINUS))
-		goto nla_put_failure;
-	if ((chan->flags & IEEE80211_CHAN_NO_HT40PLUS) &&
-	    nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_PLUS))
-		goto nla_put_failure;
-	if ((chan->flags & IEEE80211_CHAN_NO_80MHZ) &&
-	    nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_80MHZ))
-		goto nla_put_failure;
-	if ((chan->flags & IEEE80211_CHAN_NO_160MHZ) &&
-	    nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_160MHZ))
+	if ((chan->flags & IEEE80211_CHAN_RADAR) &&
+	    nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
 		goto nla_put_failure;
 
 	if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
@@ -900,9 +881,6 @@ static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 		    nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
 				c->max_interfaces))
 			goto nla_put_failure;
-		if (nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_WIDTHS,
-				c->radar_detect_widths))
-			goto nla_put_failure;
 
 		nla_nest_end(msg, nl_combi);
 	}
@@ -914,48 +892,6 @@ static int nl80211_put_iface_combinations(struct wiphy *wiphy,
 	return -ENOBUFS;
 }
 
-#ifdef CONFIG_PM
-static int nl80211_send_wowlan_tcp_caps(struct cfg80211_registered_device *rdev,
-					struct sk_buff *msg)
-{
-	const struct wiphy_wowlan_tcp_support *tcp = rdev->wiphy.wowlan.tcp;
-	struct nlattr *nl_tcp;
-
-	if (!tcp)
-		return 0;
-
-	nl_tcp = nla_nest_start(msg, NL80211_WOWLAN_TRIG_TCP_CONNECTION);
-	if (!nl_tcp)
-		return -ENOBUFS;
-
-	if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
-			tcp->data_payload_max))
-		return -ENOBUFS;
-
-	if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
-			tcp->data_payload_max))
-		return -ENOBUFS;
-
-	if (tcp->seq && nla_put_flag(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ))
-		return -ENOBUFS;
-
-	if (tcp->tok && nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
-				sizeof(*tcp->tok), tcp->tok))
-		return -ENOBUFS;
-
-	if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
-			tcp->data_interval_max))
-		return -ENOBUFS;
-
-	if (nla_put_u32(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
-			tcp->wake_payload_max))
-		return -ENOBUFS;
-
-	nla_nest_end(msg, nl_tcp);
-	return 0;
-}
-#endif
-
 static int nl80211_send_wiphy(struct sk_buff *msg, u32 portid, u32 seq, int flags,
 			      struct cfg80211_registered_device *dev)
 {
@@ -1330,9 +1266,6 @@ static int nl80211_send_wiphy(struct sk_buff *msg, u32 portid, u32 seq, int flag
 				goto nla_put_failure;
 		}
 
-		if (nl80211_send_wowlan_tcp_caps(dev, msg))
-			goto nla_put_failure;
-
 		nla_nest_end(msg, nl_wowlan);
 	}
 #endif
@@ -1365,15 +1298,6 @@ static int nl80211_send_wiphy(struct sk_buff *msg, u32 portid, u32 seq, int flag
 			dev->wiphy.max_acl_mac_addrs))
 		goto nla_put_failure;
 
-	if (dev->wiphy.extended_capabilities &&
-	    (nla_put(msg, NL80211_ATTR_EXT_CAPA,
-		     dev->wiphy.extended_capabilities_len,
-		     dev->wiphy.extended_capabilities) ||
-	     nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
-		     dev->wiphy.extended_capabilities_len,
-		     dev->wiphy.extended_capabilities_mask)))
-		goto nla_put_failure;
-
 	return genlmsg_end(msg, hdr);
 
  nla_put_failure:
@@ -1383,7 +1307,7 @@ static int nl80211_send_wiphy(struct sk_buff *msg, u32 portid, u32 seq, int flag
 
 static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
 {
-	int idx = 0;
+	int idx = 0, ret;
 	int start = cb->args[0];
 	struct cfg80211_registered_device *dev;
 
@@ -1393,9 +1317,29 @@ static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
 			continue;
 		if (++idx <= start)
 			continue;
-		if (nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).portid,
+		ret = nl80211_send_wiphy(skb, NETLINK_CB(cb->skb).portid,
 					 cb->nlh->nlmsg_seq, NLM_F_MULTI,
-				       dev) < 0) {
+					 dev);
+		if (ret < 0) {
+			/*
+			 * If sending the wiphy data didn't fit (ENOBUFS or
+			 * EMSGSIZE returned), this SKB is still empty (so
+			 * it's not too big because another wiphy dataset is
+			 * already in the skb) and we've not tried to adjust
+			 * the dump allocation yet ... then adjust the alloc
+			 * size to be bigger, and return 1 but with the empty
+			 * skb. This results in an empty message being RX'ed
+			 * in userspace, but that is ignored.
+			 *
+			 * We can then retry with the larger buffer.
+			 */
+			if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
+			    !skb->len &&
+			    cb->min_dump_alloc < 4096) {
+				cb->min_dump_alloc = 4096;
+				mutex_unlock(&cfg80211_mutex);
+				return 1;
+			}
 			idx--;
 			break;
 		}
@@ -1412,7 +1356,7 @@ static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
 	struct sk_buff *msg;
 	struct cfg80211_registered_device *dev = info->user_ptr[0];
 
-	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+	msg = nlmsg_new(4096, GFP_KERNEL);
 	if (!msg)
 		return -ENOMEM;