From: Benjamin Poirier <bpoirier@suse.de>
Date: Thu, 24 May 2012 11:32:38 +0000 (+0000)
Subject: xfrm: take net hdr len into account for esp payload size calculation
X-Git-Tag: v3.2.20~12
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f7687e882a0bbdc0bbd60613ed170d5fa4d55a44;p=pandora-kernel.git

xfrm: take net hdr len into account for esp payload size calculation

[ Upstream commit 91657eafb64b4cb53ec3a2fbc4afc3497f735788 ]

Corrects the function that determines the esp payload size. The calculations
done in esp{4,6}_get_mtu() lead to overlength frames in transport mode for
certain mtu values and suboptimal frames for others.

According to what is done, mainly in esp{,6}_output() and tcp_mtu_to_mss(),
net_header_len must be taken into account before doing the alignment
calculation.

Signed-off-by: Benjamin Poirier <bpoirier@suse.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
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