netdev - [PATCH net-next 1/3] net: core: let skb_partial_csum

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Date:	Wed, 27 Mar 2013 17:11:20 +0800
From:	Jason Wang <jasowang@...hat.com>
To:	davem@...emloft.net, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc:	mst@...hat.com, Jason Wang <jasowang@...hat.com>,
	Eric Dumazet <edumazet@...gle.com>
Subject: [PATCH net-next 1/3] net: core: let skb_partial_csum_set() set transport header

For untrusted packets with partial checksum, we need to set the transport header
for precise packet length estimation. We can just let skb_pratial_csum_set() to
do this to avoid extra call to skb_flow_dissect() and simplify the caller.

Cc: Eric Dumazet <edumazet@...gle.com>
Signed-off-by: Jason Wang <jasowang@...hat.com>
---
 net/core/skbuff.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 31c6737..ba64614 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -3370,6 +3370,7 @@ bool skb_partial_csum_set(struct sk_buff *skb, u16 start, u16 off)
 	skb->ip_summed = CHECKSUM_PARTIAL;
 	skb->csum_start = skb_headroom(skb) + start;
 	skb->csum_offset = off;
+	skb_set_transport_header(skb, start);
 	return true;
 }
 EXPORT_SYMBOL_GPL(skb_partial_csum_set);
-- 
1.7.1

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