netdev - Re: [PATCHv2 ipsec] esp6: support ipv6 nexthdrs process for beet gso segment

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Date:   Wed, 22 Apr 2020 11:24:35 +0200
From:   Steffen Klassert <steffen.klassert@...unet.com>
To:     Xin Long <lucien.xin@...il.com>
CC:     <netdev@...r.kernel.org>, Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>,
        Sabrina Dubroca <sd@...asysnail.net>
Subject: Re: [PATCHv2 ipsec] esp6: support ipv6 nexthdrs process for beet gso
 segment

On Sun, Apr 19, 2020 at 04:10:00PM +0800, Xin Long wrote:
> For beet mode, when it's ipv6 inner address with nexthdrs set,
> the packet format might be:
> 
>     ----------------------------------------------------
>     | outer  |     | dest |     |      |  ESP    | ESP |
>     | IP6 hdr| ESP | opts.| TCP | Data | Trailer | ICV |
>     ----------------------------------------------------
> 
> Before doing gso segment in xfrm6_beet_gso_segment(), it should
> skip all nexthdrs and get the real transport proto, and set
> transport_header properly.
> 
> This patch is to fix it by simply calling ipv6_skip_exthdr()
> in xfrm6_beet_gso_segment().
> 
> v1->v2:
>   - remove skb_transport_offset(), as it will always return 0
>     in xfrm6_beet_gso_segment(), thank Sabrina's check.
> 
> Fixes: 7f9e40eb18a9 ("esp6: add gso_segment for esp6 beet mode")
> Signed-off-by: Xin Long <lucien.xin@...il.com>

Applied, thanks a lot!