tree 8d46024f2e5c82b0c811c87c8a9924b0efdd28dd
parent c1aad275b0293d2b1905ec95a945422262470684
author Jason Wang <jasowang@redhat.com> 1364242798 +0000
committer David S. Miller <davem@davemloft.net> 1364316284 -0400

netback: set transport header before passing it to kernel

Currently, for the packets receives from netback, before doing header check,
kernel just reset the transport header in netif_receive_skb() which pretends non
l4 header. This is suboptimal for precise packet length estimation (introduced
in 1def9238: net_sched: more precise pkt_len computation) which needs correct l4
header for gso packets.

The patch just reuse the header probed by netback for partial checksum packets
and tries to use skb_flow_dissect() for other cases, if both fail, just pretend
no l4 header.

Cc: Eric Dumazet <edumazet@google.com>
Cc: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>