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authorEric Dumazet <eric.dumazet@gmail.com>2010-10-01 01:06:55 +0400
committerDavid S. Miller <davem@davemloft.net>2010-10-06 01:47:55 +0400
commitcaf586e5f23cebb2a68cbaf288d59dbbf2d74052 (patch)
tree5c0dfcf5a14c55501f9225835c83abddb8d1876e /net/8021q
parenta00eac0c459abecb539fb2a2abd3122dd7ca5d4a (diff)
downloadlinux-caf586e5f23cebb2a68cbaf288d59dbbf2d74052.tar.xz
net: add a core netdev->rx_dropped counter
In various situations, a device provides a packet to our stack and we drop it before it enters protocol stack : - softnet backlog full (accounted in /proc/net/softnet_stat) - bad vlan tag (not accounted) - unknown/unregistered protocol (not accounted) We can handle a per-device counter of such dropped frames at core level, and automatically adds it to the device provided stats (rx_dropped), so that standard tools can be used (ifconfig, ip link, cat /proc/net/dev) This is a generalization of commit 8990f468a (net: rx_dropped accounting), thus reverting it. 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_core.c2
-rw-r--r--net/8021q/vlan_dev.c11
3 files changed, 6 insertions, 9 deletions
diff --git a/net/8021q/vlan.h b/net/8021q/vlan.h
index b26ce343072c..8d9503ad01da 100644
--- a/net/8021q/vlan.h
+++ b/net/8021q/vlan.h
@@ -25,7 +25,6 @@ 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;
@@ -33,7 +32,6 @@ 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_core.c b/net/8021q/vlan_core.c
index b6d55a9304f2..dee727ce0291 100644
--- a/net/8021q/vlan_core.c
+++ b/net/8021q/vlan_core.c
@@ -33,6 +33,7 @@ int __vlan_hwaccel_rx(struct sk_buff *skb, struct vlan_group *grp,
return polling ? netif_receive_skb(skb) : netif_rx(skb);
drop:
+ atomic_long_inc(&skb->dev->rx_dropped);
dev_kfree_skb_any(skb);
return NET_RX_DROP;
}
@@ -123,6 +124,7 @@ vlan_gro_common(struct napi_struct *napi, struct vlan_group *grp,
return dev_gro_receive(napi, skb);
drop:
+ atomic_long_inc(&skb->dev->rx_dropped);
return GRO_DROP;
}
diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c
index f6fbcc0f1af9..f54251edd40d 100644
--- a/net/8021q/vlan_dev.c
+++ b/net/8021q/vlan_dev.c
@@ -225,16 +225,15 @@ int vlan_skb_recv(struct sk_buff *skb, struct net_device *dev,
}
}
- if (unlikely(netif_rx(skb) == NET_RX_DROP)) {
- if (rx_stats)
- rx_stats->rx_dropped++;
- }
+ netif_rx(skb);
+
rcu_read_unlock();
return NET_RX_SUCCESS;
err_unlock:
rcu_read_unlock();
err_free:
+ atomic_long_inc(&dev->rx_dropped);
kfree_skb(skb);
return NET_RX_DROP;
}
@@ -846,15 +845,13 @@ 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, rx_dropped are ulong, not protected by syncp */
+ /* rx_errors is 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;
}