Commit db94357d authored by Saravana's avatar Saravana Committed by Johannes Berg

mac80211: add debugfs file for last ack signal

Add a debugfs file showing the signal strength
of the ack frame that is received for the
currently sent tx packet
Signed-off-by: default avatarSaravana <>
Signed-off-by: default avatarJohannes Berg <>
parent dbeca2ea
......@@ -53,6 +53,7 @@ static const struct file_operations sta_ ##name## _ops = { \
STA_FILE(aid, sta.aid, D);
STA_FILE(dev, sdata->name, S);
STA_FILE(last_signal, last_signal, D);
STA_FILE(last_ack_signal, last_ack_signal, D);
static ssize_t sta_flags_read(struct file *file, char __user *userbuf,
size_t count, loff_t *ppos)
......@@ -369,6 +370,7 @@ void ieee80211_sta_debugfs_add(struct sta_info *sta)
DEBUGFS_ADD_COUNTER(rx_packets, rx_packets);
DEBUGFS_ADD_COUNTER(tx_packets, tx_packets);
......@@ -250,6 +250,7 @@ struct sta_ampdu_mlme {
* @rx_dropped: number of dropped MPDUs from this STA
* @last_signal: signal of last received frame from this STA
* @avg_signal: moving average of signal of received frames from this STA
* @last_ack_signal: signal of last received Ack frame from this STA
* @last_seq_ctrl: last received seq/frag number from this STA (per RX queue)
* @tx_filtered_count: number of frames the hardware filtered for this STA
* @tx_retry_failed: number of frames that failed retry
......@@ -329,6 +330,7 @@ struct sta_info {
unsigned long rx_dropped;
int last_signal;
struct ewma avg_signal;
int last_ack_signal;
/* Plus 1 for non-QoS frames */
__le16 last_seq_ctrl[IEEE80211_NUM_TIDS + 1];
......@@ -539,6 +539,9 @@ void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
sta->lost_packets = 0;
if (acked)
sta->last_ack_signal = info->status.ack_signal;
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