netdev - Re: [PATCH v2] ipv6: fix incorrect ipsec fragment

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Message-Id: <20120527.011216.1298417866757459701.davem@davemloft.net>
Date:	Sun, 27 May 2012 01:12:16 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	gaofeng@...fujitsu.com
Cc:	netdev@...r.kernel.org, steffen.klassert@...unet.com,
	lw@...fujitsu.com
Subject: Re: [PATCH v2] ipv6: fix incorrect ipsec fragment

From: Gao feng <gaofeng@...fujitsu.com>
Date: Sat, 26 May 2012 19:30:53 +0800

> Since commit ad0081e43a
> "ipv6: Fragment locally generated tunnel-mode IPSec6 packets as needed"
> the fragment of packets is incorrect.
> because tunnel mode needs IPsec headers and trailer for all fragments,
> while on transport mode it is sufficient to add the headers to the
> first fragment and the trailer to the last.
> 
> so modify mtu and maxfraglen base on ipsec mode and if fragment is first
> or last.
> 
> with my test,it work well(every fragment's size is the mtu)
> and does not trigger slow fragment path.
> 
> Changes from v1:
> 	though optimization, mtu_prev and maxfraglen_prev can be delete.
> 	replace xfrm mode codes with dst_entry's new frag DST_XFRM_TUNNEL.
> 	add fuction ip6_append_data_mtu to make codes clearer.
> 
> Signed-off-by: Gao feng <gaofeng@...fujitsu.com>

Applied, and queued up for -stable, thanks.
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