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authorEric Dumazet <eric.dumazet@gmail.com>2010-09-20 04:12:11 +0400
committerDavid S. Miller <davem@davemloft.net>2010-09-20 21:08:58 +0400
commit8990f468ae9010ab0af4be8f51bf7ab833a67202 (patch)
treee84ad358ed67da6011b1e20f3d8039d1f9f07e4a /net/8021q
parent462fb2af9788a82a534f8184abfde31574e1cfa0 (diff)
downloadlinux-8990f468ae9010ab0af4be8f51bf7ab833a67202.tar.xz
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>
Diffstat (limited to 'net/8021q')
-rw-r--r--net/8021q/vlan.h2
-rw-r--r--net/8021q/vlan_dev.c9
2 files changed, 9 insertions, 2 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;
};
/**
diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c
index 3bccdd12a264..94a1feddeb49 100644
--- a/net/8021q/vlan_dev.c
+++ b/net/8021q/vlan_dev.c
@@ -225,7 +225,10 @@ int vlan_skb_recv(struct sk_buff *skb, struct net_device *dev,
}
}
- netif_rx(skb);
+ if (unlikely(netif_rx(skb) == NET_RX_DROP)) {
+ if (rx_stats)
+ rx_stats->rx_dropped++;
+ }
rcu_read_unlock();
return NET_RX_SUCCESS;
@@ -843,13 +846,15 @@ static struct rtnl_link_stats64 *vlan_dev_get_stats64(struct net_device *dev, st
accum.rx_packets += rxpackets;
accum.rx_bytes += rxbytes;
accum.rx_multicast += rxmulticast;
- /* rx_errors is an ulong, not protected by syncp */
+ /* rx_errors, rx_dropped are ulong, not protected by syncp */
accum.rx_errors += p->rx_errors;
+ accum.rx_dropped += p->rx_dropped;
}
stats->rx_packets = accum.rx_packets;
stats->rx_bytes = accum.rx_bytes;
stats->rx_errors = accum.rx_errors;
stats->multicast = accum.rx_multicast;
+ stats->rx_dropped = accum.rx_dropped;
}
return stats;
}