net: rx_dropped accounting

Under load, netif_rx() can drop incoming packets but administrators dont
have a chance to spot which device needs some tuning (RPS activation for
example)

This patch adds rx_dropped accounting in vlans and tunnels.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 0 deletions

diff --git a/net/8021q/vlan.h b/net/8021q/vlan.h
index 8d9503ad01da..b26ce343072c 100644
--- a/net/8021q/vlan.h
+++ b/net/8021q/vlan.h
@@ -25,6 +25,7 @@ struct vlan_priority_tci_mapping {
  *      @rx_multicast: number of received multicast packets
  *      @syncp: synchronization point for 64bit counters
  *      @rx_errors: number of errors
+ *      @rx_dropped: number of dropped packets
  */
 struct vlan_rx_stats {
         u64                     rx_packets;
@@ -32,6 +33,7 @@ struct vlan_rx_stats {
         u64                     rx_multicast;
         struct u64_stats_sync   syncp;
         unsigned long           rx_errors;
+        unsigned long           rx_dropped;
 };
 
 /**