tree 5c0dfcf5a14c55501f9225835c83abddb8d1876e
parent a00eac0c459abecb539fb2a2abd3122dd7ca5d4a
author Eric Dumazet <eric.dumazet@gmail.com> 1285880815 +0000
committer David S. Miller <davem@davemloft.net> 1286315275 -0700

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>