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Date:   Wed, 30 Dec 2020 19:37:53 -0800
From:   Jakub Kicinski <>
Cc:, Jakub Kicinski <>
Subject: [PATCH net] net: suggest L2 discards be counted towards rx_dropped

>From the existing definitions it's unclear which stat to
use to report filtering based on L2 dst addr in old
broadcast-medium Ethernet.

Signed-off-by: Jakub Kicinski <>
 include/uapi/linux/if_link.h | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h
index 874cc12a34d9..82708c6db432 100644
--- a/include/uapi/linux/if_link.h
+++ b/include/uapi/linux/if_link.h
@@ -75,8 +75,9 @@ struct rtnl_link_stats {
  * @rx_dropped: Number of packets received but not processed,
  *   e.g. due to lack of resources or unsupported protocol.
- *   For hardware interfaces this counter should not include packets
- *   dropped by the device which are counted separately in
+ *   For hardware interfaces this counter may include packets discarded
+ *   due to L2 address filtering but should not include packets dropped
+ *   by the device due to buffer exhaustion which are counted separately in
  *   @rx_missed_errors (since procfs folds those two counters together).
  * @tx_dropped: Number of packets dropped on their way to transmission,

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