From 0d4e14a32dcab9c4bd559d02874120fbb86b1322 Mon Sep 17 00:00:00 2001 From: Ankita Bajaj Date: Thu, 27 Sep 2018 18:01:57 +0300 Subject: nl80211: Add per peer statistics to compute FCS error rate Add support for drivers to report the total number of MPDUs received and the number of MPDUs received with an FCS error from a specific peer. These counters will be incremented only when the TA of the frame matches the MAC address of the peer irrespective of FCS error. It should be noted that the TA field in the frame might be corrupted when there is an FCS error and TA matching logic would fail in such cases. Hence, FCS error counter might not be fully accurate, but it can provide help in detecting bad RX links in significant number of cases. This FCS error counter without full accuracy can be used, e.g., to trigger a kick-out of a connected client with a bad link in AP mode to force such a client to roam to another AP. Signed-off-by: Ankita Bajaj Signed-off-by: Jouni Malinen Signed-off-by: Johannes Berg --- include/net/cfg80211.h | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'include/net') diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index 0e16e723dcef..1fa41b7a1be3 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -1303,6 +1303,10 @@ struct cfg80211_tid_stats { * @ack_signal: signal strength (in dBm) of the last ACK frame. * @avg_ack_signal: average rssi value of ack packet for the no of msdu's has * been sent. + * @rx_mpdu_count: number of MPDUs received from this station + * @fcs_err_count: number of packets (MPDUs) received from this station with + * an FCS error. This counter should be incremented only when TA of the + * received packet with an FCS error matches the peer MAC address. */ struct station_info { u64 filled; @@ -1349,6 +1353,9 @@ struct station_info { struct cfg80211_tid_stats *pertid; s8 ack_signal; s8 avg_ack_signal; + + u32 rx_mpdu_count; + u32 fcs_err_count; }; #if IS_ENABLED(CONFIG_CFG80211) -- cgit v1.2.3