mac80211: don't duplicate station QoS capability data

We currently track the QoS capability twice: for all peer stations
in the WLAN_STA_WME flag, and for any clients associated to an AP
interface separately for drivers in the sta->sta.wme field.

Remove the WLAN_STA_WME flag and track the capability only in the
driver-visible field, getting rid of the limitation that the field
is only valid in AP mode.

Reviewed-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

include/net/mac80211.h

@@ -1405,7 +1405,7 @@ struct ieee80211_sta_rates {
  * @supp_rates: Bitmap of supported rates (per band)
  * @ht_cap: HT capabilities of this STA; restricted to our own capabilities
  * @vht_cap: VHT capabilities of this STA; restricted to our own capabilities
- * @wme: indicates whether the STA supports WME. Only valid during AP-mode.
+ * @wme: indicates whether the STA supports QoS/WME.
  * @drv_priv: data area for driver use, will always be aligned to
  *	sizeof(void *), size is determined in hw information.
  * @uapsd_queues: bitmap of queues configured for uapsd. Only valid

net/mac80211/cfg.c

@@ -1011,15 +1011,8 @@ static int sta_apply_parameters(struct ieee80211_local *local,
 			clear_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE);
 	}
 
-	if (mask & BIT(NL80211_STA_FLAG_WME)) {
-		if (set & BIT(NL80211_STA_FLAG_WME)) {
-			set_sta_flag(sta, WLAN_STA_WME);
-			sta->sta.wme = true;
-		} else {
-			clear_sta_flag(sta, WLAN_STA_WME);
-			sta->sta.wme = false;
-		}
-	}
+	if (mask & BIT(NL80211_STA_FLAG_WME))
+		sta->sta.wme = set & BIT(NL80211_STA_FLAG_WME);
 
 	if (mask & BIT(NL80211_STA_FLAG_MFP)) {
 		if (set & BIT(NL80211_STA_FLAG_MFP))
@@ -3352,7 +3345,7 @@ static int ieee80211_probe_client(struct wiphy *wiphy, struct net_device *dev,
 	band = chanctx_conf->def.chan->band;
 	sta = sta_info_get_bss(sdata, peer);
 	if (sta) {
-		qos = test_sta_flag(sta, WLAN_STA_WME);
+		qos = sta->sta.wme;
 	} else {
 		rcu_read_unlock();
 		return -ENOLINK;

net/mac80211/debugfs_sta.c

@@ -77,7 +77,8 @@ static ssize_t sta_flags_read(struct file *file, char __user *userbuf,
 			    TEST(AUTH), TEST(ASSOC), TEST(PS_STA),
 			    TEST(PS_DRIVER), TEST(AUTHORIZED),
 			    TEST(SHORT_PREAMBLE),
-			    TEST(WME), TEST(WDS), TEST(CLEAR_PS_FILT),
+			    sta->sta.wme ? "WME\n" : "",
+			    TEST(WDS), TEST(CLEAR_PS_FILT),
 			    TEST(MFP), TEST(BLOCK_BA), TEST(PSPOLL),
 			    TEST(UAPSD), TEST(SP), TEST(TDLS_PEER),
 			    TEST(TDLS_PEER_AUTH), TEST(4ADDR_EVENT),

net/mac80211/ibss.c

@@ -1038,7 +1038,7 @@ static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
 		}
 
 		if (sta && elems->wmm_info)
-			set_sta_flag(sta, WLAN_STA_WME);
+			sta->sta.wme = true;
 
 		if (sta && elems->ht_operation && elems->ht_cap_elem &&
 		    sdata->u.ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT &&

net/mac80211/mesh_plink.c

@@ -431,14 +431,12 @@ __mesh_sta_info_alloc(struct ieee80211_sub_if_data *sdata, u8 *hw_addr)
 		return NULL;
 
 	sta->plink_state = NL80211_PLINK_LISTEN;
+	sta->sta.wme = true;
 
 	sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
 	sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
 	sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
 
-	set_sta_flag(sta, WLAN_STA_WME);
-	sta->sta.wme = true;
-
 	return sta;
 }
 

net/mac80211/mlme.c

@@ -2677,8 +2677,7 @@ static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
 	if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
 		set_sta_flag(sta, WLAN_STA_MFP);
 
-	if (elems.wmm_param)
-		set_sta_flag(sta, WLAN_STA_WME);
+	sta->sta.wme = elems.wmm_param;
 
 	err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
 	if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))

net/mac80211/sta_info.c

@@ -1179,7 +1179,7 @@ static void ieee80211_send_null_response(struct ieee80211_sub_if_data *sdata,
 	struct sk_buff *skb;
 	int size = sizeof(*nullfunc);
 	__le16 fc;
-	bool qos = test_sta_flag(sta, WLAN_STA_WME);
+	bool qos = sta->sta.wme;
 	struct ieee80211_tx_info *info;
 	struct ieee80211_chanctx_conf *chanctx_conf;
 
@@ -1834,7 +1834,7 @@ void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo)
 		sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHORIZED);
 	if (test_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE))
 		sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
-	if (test_sta_flag(sta, WLAN_STA_WME))
+	if (sta->sta.wme)
 		sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_WME);
 	if (test_sta_flag(sta, WLAN_STA_MFP))
 		sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_MFP);

net/mac80211/sta_info.h

@@ -31,7 +31,6 @@
  *	when virtual port control is not in use.
  * @WLAN_STA_SHORT_PREAMBLE: Station is capable of receiving short-preamble
  *	frames.
- * @WLAN_STA_WME: Station is a QoS-STA.
  * @WLAN_STA_WDS: Station is one of our WDS peers.
  * @WLAN_STA_CLEAR_PS_FILT: Clear PS filter in hardware (using the
  *	IEEE80211_TX_CTL_CLEAR_PS_FILT control flag) when the next
@@ -69,7 +68,6 @@ enum ieee80211_sta_info_flags {
 	WLAN_STA_PS_STA,
 	WLAN_STA_AUTHORIZED,
 	WLAN_STA_SHORT_PREAMBLE,
-	WLAN_STA_WME,
 	WLAN_STA_WDS,
 	WLAN_STA_CLEAR_PS_FILT,
 	WLAN_STA_MFP,

net/mac80211/tdls.c

@@ -316,8 +316,7 @@ ieee80211_tdls_add_setup_cfm_ies(struct ieee80211_sub_if_data *sdata,
 	}
 
 	/* add the QoS param IE if both the peer and we support it */
-	if (local->hw.queues >= IEEE80211_NUM_ACS &&
-	    test_sta_flag(sta, WLAN_STA_WME))
+	if (local->hw.queues >= IEEE80211_NUM_ACS && sta->sta.wme)
 		ieee80211_tdls_add_wmm_param_ie(sdata, skb);
 
 	/* add any custom IEs that go before HT operation */

net/mac80211/tx.c

@@ -1844,7 +1844,7 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
 			memcpy(hdr.addr4, skb->data + ETH_ALEN, ETH_ALEN);
 			hdrlen = 30;
 			authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
-			wme_sta = test_sta_flag(sta, WLAN_STA_WME);
+			wme_sta = sta->sta.wme;
 		}
 		ap_sdata = container_of(sdata->bss, struct ieee80211_sub_if_data,
 					u.ap);
@@ -1957,7 +1957,7 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
 			if (sta) {
 				authorized = test_sta_flag(sta,
 							WLAN_STA_AUTHORIZED);
-				wme_sta = test_sta_flag(sta, WLAN_STA_WME);
+				wme_sta = sta->sta.wme;
 				tdls_peer = test_sta_flag(sta,
 							  WLAN_STA_TDLS_PEER);
 				tdls_auth = test_sta_flag(sta,
@@ -2035,7 +2035,7 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
 		sta = sta_info_get(sdata, hdr.addr1);
 		if (sta) {
 			authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
-			wme_sta = test_sta_flag(sta, WLAN_STA_WME);
+			wme_sta = sta->sta.wme;
 		}
 	}
 

net/mac80211/wme.c

@@ -118,7 +118,7 @@ u16 ieee80211_select_queue(struct ieee80211_sub_if_data *sdata,
 	case NL80211_IFTYPE_AP_VLAN:
 		sta = rcu_dereference(sdata->u.vlan.sta);
 		if (sta) {
-			qos = test_sta_flag(sta, WLAN_STA_WME);
+			qos = sta->sta.wme;
 			break;
 		}
 	case NL80211_IFTYPE_AP:
@@ -145,7 +145,7 @@ u16 ieee80211_select_queue(struct ieee80211_sub_if_data *sdata,
 	if (!sta && ra && !is_multicast_ether_addr(ra)) {
 		sta = sta_info_get(sdata, ra);
 		if (sta)
-			qos = test_sta_flag(sta, WLAN_STA_WME);
+			qos = sta->sta.wme;
 	}
 	rcu_read_unlock();