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net: introduce skb_transport_header_was_set()

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We have skb_mac_header_was_set() helper to tell if mac_header
was set on a skb. We would like the same for transport_header.

__netif_receive_skb() doesn't reset the transport header if already
set by GRO layer.

Note that network stacks usually reset the transport header anyway,
after pulling the network header, so this change only allows
a followup patch to have more precise qdisc pkt_len computation
for GSO packets at ingress side.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet
2013-01-07 09:28:21 +00:00
committed by David S. Miller
parent 0edb7ede7d
commit fda55eca5a
3 changed files with 14 additions and 1 deletions
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3
net/core/dev.c
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@@ -3352,7 +3352,8 @@ static int __netif_receive_skb(struct sk_buff *skb)
orig_dev = skb->dev;
skb_reset_network_header(skb);
skb_reset_transport_header(skb);
if (!skb_transport_header_was_set(skb))
skb_reset_transport_header(skb);
skb_reset_mac_len(skb);
pt_prev = NULL;