1 files changed, 5 insertions, 2 deletions

diff --git a/include/uapi/linux/tcp_metrics.h b/include/uapi/linux/tcp_metrics.h
index 54a37b13f2c4..93533926035c 100644
--- a/include/uapi/linux/tcp_metrics.h
+++ b/include/uapi/linux/tcp_metrics.h
@@ -11,12 +11,15 @@
 #define TCP_METRICS_GENL_VERSION        0x1
 
 enum tcp_metric_index {
-        TCP_METRIC_RTT,
-        TCP_METRIC_RTTVAR,
+        TCP_METRIC_RTT,         /* in ms units */
+        TCP_METRIC_RTTVAR,      /* in ms units */
         TCP_METRIC_SSTHRESH,
         TCP_METRIC_CWND,
         TCP_METRIC_REORDERING,
 
+        TCP_METRIC_RTT_US,      /* in usec units */
+        TCP_METRIC_RTTVAR_US,   /* in usec units */
+
         /* Always last.  */
         __TCP_METRIC_MAX,
 };