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Commit b8da6b6a authored by Johannes Berg's avatar Johannes Berg
Browse files

mac80211: add separate last_ack variable 



Instead of touching the rx_stats.last_rx from the status path, introduce
and use a status_stats.last_ack variable. This will make rx_stats.last_rx
indicate when the last frame was received, making it available for real
"last_rx" and statistics gathering; statistics, when done per-CPU, will
need to figure out which place was updated last for those items where the
"last" value is exposed.

Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent 2df8bfd7

net/mac80211/ibss.c

+8 −5
Original line number Diff line number Diff line
@@ -668,10 +668,11 @@ static int ieee80211_sta_active_ibss(struct ieee80211_sub_if_data *sdata) 
	rcu_read_lock();



	list_for_each_entry_rcu(sta, &local->sta_list, list) {

		unsigned long last_active = ieee80211_sta_last_active(sta);



		if (sta->sdata == sdata &&

		    time_after(sta->rx_stats.last_rx +

			       IEEE80211_IBSS_MERGE_INTERVAL,

			       jiffies)) {

		    time_is_after_jiffies(last_active +

					  IEEE80211_IBSS_MERGE_INTERVAL)) {

			active++;

			break;

		}
@@ -1255,11 +1256,13 @@ static void ieee80211_ibss_sta_expire(struct ieee80211_sub_if_data *sdata) 
	mutex_lock(&local->sta_mtx);



	list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {

		unsigned long last_active = ieee80211_sta_last_active(sta);



		if (sdata != sta->sdata)

			continue;



		if (time_after(jiffies, sta->rx_stats.last_rx + exp_time) ||

		    (time_after(jiffies, sta->rx_stats.last_rx + exp_rsn) &&

		if (time_is_before_jiffies(last_active + exp_time) ||

		    (time_is_before_jiffies(last_active + exp_rsn) &&

		     sta->sta_state != IEEE80211_STA_AUTHORIZED)) {

			sta_dbg(sta->sdata, "expiring inactive %sSTA %pM\n",

				sta->sta_state != IEEE80211_STA_AUTHORIZED ?

net/mac80211/sta_info.c

+11 −2
Original line number Diff line number Diff line
@@ -1094,10 +1094,12 @@ void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, 
	mutex_lock(&local->sta_mtx);



	list_for_each_entry_safe(sta, tmp, &local->sta_list, list) {

		unsigned long last_active = ieee80211_sta_last_active(sta);



		if (sdata != sta->sdata)

			continue;



		if (time_after(jiffies, sta->rx_stats.last_rx + exp_time)) {

		if (time_is_before_jiffies(last_active + exp_time)) {

			sta_dbg(sta->sdata, "expiring inactive STA %pM\n",

				sta->sta.addr);
@@ -2000,7 +2002,7 @@ void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo) 


	sinfo->connected_time = ktime_get_seconds() - sta->last_connected;

	sinfo->inactive_time =

		jiffies_to_msecs(jiffies - sta->rx_stats.last_rx);

		jiffies_to_msecs(jiffies - ieee80211_sta_last_active(sta));



	if (!(sinfo->filled & (BIT(NL80211_STA_INFO_TX_BYTES64) |

			       BIT(NL80211_STA_INFO_TX_BYTES)))) {
@@ -2186,3 +2188,10 @@ void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo) 
		sinfo->expected_throughput = thr;

	}

}



unsigned long ieee80211_sta_last_active(struct sta_info *sta)

{

	if (time_after(sta->rx_stats.last_rx, sta->status_stats.last_ack))

		return sta->rx_stats.last_rx;

	return sta->status_stats.last_ack;

}

net/mac80211/sta_info.h

+3 −0
Original line number Diff line number Diff line
@@ -474,6 +474,7 @@ struct sta_info { 
		unsigned long last_tdls_pkt_time;

		u64 msdu_retries[IEEE80211_NUM_TIDS + 1];

		u64 msdu_failed[IEEE80211_NUM_TIDS + 1];

		unsigned long last_ack;

	} status_stats;



	/* Updated from TX path only, no locking requirements */
@@ -680,4 +681,6 @@ void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta); 
void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta);

void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta);



unsigned long ieee80211_sta_last_active(struct sta_info *sta);



#endif /* STA_INFO_H */

net/mac80211/status.c

+2 −2
Original line number Diff line number Diff line
@@ -188,7 +188,7 @@ static void ieee80211_frame_acked(struct sta_info *sta, struct sk_buff *skb) 
	struct ieee80211_sub_if_data *sdata = sta->sdata;



	if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS))

		sta->rx_stats.last_rx = jiffies;

		sta->status_stats.last_ack = jiffies;



	if (ieee80211_is_data_qos(mgmt->frame_control)) {

		struct ieee80211_hdr *hdr = (void *) skb->data;
@@ -647,7 +647,7 @@ void ieee80211_tx_status_noskb(struct ieee80211_hw *hw, 
		sta->status_stats.retry_count += retry_count;



		if (acked) {

			sta->rx_stats.last_rx = jiffies;

			sta->status_stats.last_ack = jiffies;



			if (sta->status_stats.lost_packets)

				sta->status_stats.lost_packets = 0;