nl80211: support per-TID station statistics

The base for the current statistics is pretty mixed up, support
exporting RX/TX statistics for MSDUs per TID. This (currently)
covers received MSDUs, transmitted MSDUs and retries/failures
thereof.

Doing it per TID for MSDUs makes more sense than say only per AC
because it's symmetric - we could export per-AC statistics for all
frames (which AC we used for transmission can be determined also
for management frames) but per TID is better and usually data
frames are really the ones we care about. Also, on RX we can't
determine the AC - but we do know the TID for any QoS MPDU we
received.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 31 insertions, 0 deletions

diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h
index b0fb5d598250..a963d4824c51 100644
--- a/include/uapi/linux/nl80211.h
+++ b/include/uapi/linux/nl80211.h
@@ -2384,6 +2384,11 @@ enum nl80211_sta_bss_param {
  * @NL80211_STA_INFO_BEACON_RX: number of beacons received from this peer (u64)
  * @NL80211_STA_INFO_BEACON_SIGNAL_AVG: signal strength average
  *      for beacons only (u8, dBm)
+ * @NL80211_STA_INFO_TID_STATS: per-TID statistics (see &enum nl80211_tid_stats)
+ *      This is a nested attribute where each the inner attribute number is the
+ *      TID+1 and the special TID 16 (i.e. value 17) is used for non-QoS frames;
+ *      each one of those is again nested with &enum nl80211_tid_stats
+ *      attributes carrying the actual values.
  * @__NL80211_STA_INFO_AFTER_LAST: internal
  * @NL80211_STA_INFO_MAX: highest possible station info attribute
  */
@@ -2419,6 +2424,7 @@ enum nl80211_sta_info {
         NL80211_STA_INFO_RX_DROP_MISC,
         NL80211_STA_INFO_BEACON_RX,
         NL80211_STA_INFO_BEACON_SIGNAL_AVG,
+        NL80211_STA_INFO_TID_STATS,
 
         /* keep last */
         __NL80211_STA_INFO_AFTER_LAST,
@@ -2426,6 +2432,31 @@ enum nl80211_sta_info {
 };
 
 /**
+ * enum nl80211_tid_stats - per TID statistics attributes
+ * @__NL80211_TID_STATS_INVALID: attribute number 0 is reserved
+ * @NL80211_TID_STATS_RX_MSDU: number of MSDUs received (u64)
+ * @NL80211_TID_STATS_TX_MSDU: number of MSDUs transmitted (or
+ *      attempted to transmit; u64)
+ * @NL80211_TID_STATS_TX_MSDU_RETRIES: number of retries for
+ *      transmitted MSDUs (not counting the first attempt; u64)
+ * @NL80211_TID_STATS_TX_MSDU_FAILED: number of failed transmitted
+ *      MSDUs (u64)
+ * @NUM_NL80211_TID_STATS: number of attributes here
+ * @NL80211_TID_STATS_MAX: highest numbered attribute here
+ */
+enum nl80211_tid_stats {
+        __NL80211_TID_STATS_INVALID,
+        NL80211_TID_STATS_RX_MSDU,
+        NL80211_TID_STATS_TX_MSDU,
+        NL80211_TID_STATS_TX_MSDU_RETRIES,
+        NL80211_TID_STATS_TX_MSDU_FAILED,
+
+        /* keep last */
+        NUM_NL80211_TID_STATS,
+        NL80211_TID_STATS_MAX = NUM_NL80211_TID_STATS - 1
+};
+
+/**
  * enum nl80211_mpath_flags - nl80211 mesh path flags
  *
  * @NL80211_MPATH_FLAG_ACTIVE: the mesh path is active