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Re: ipsec doesn't route TCP with 4.11 kernel

From Eric Dumazet <eric.dumazet@gmail.com>
Newsgroups linux.kernel
Subject Re: ipsec doesn't route TCP with 4.11 kernel
Date 2017-04-28 18:50 +0200
Message-ID <tBhfI-1AI-27@gated-at.bofh.it> (permalink)
References <tAjCV-3LV-7@gated-at.bofh.it> <tAJQJ-4gp-3@gated-at.bofh.it> <tANrk-6wQ-13@gated-at.bofh.it> <tB9rP-4OU-13@gated-at.bofh.it> <tB9rP-4OU-11@gated-at.bofh.it>
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On Fri, 2017-04-28 at 09:13 +0200, Steffen Klassert wrote:
>          encap type espinudp sport 4500 dport 4500 addr 0.0.0.0
> 
> Ok, this is espinudp. This information was important.

> This is not a GRO issue as I thought, the TX side is already broken.
> 
> Could you please try the patch below?
> 
> Subject: [PATCH] esp4: Fix udpencap for local TCP packets.
> 
> Locally generated TCP packets are usually cloned, so we
> do skb_cow_data() on this packets. After that we need to
> reload the pointer to the esp header. On udpencap this
> header has an offset to skb_transport_header, so take this
> offset into account.


It looks like locally generated TCP packets could avoid the
skb_cow_data(), if you were using skb_header_cloned() instead of
skb_cloned()  ?

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Thread

ipsec doesn't route TCP with 4.11 kernel Don Bowman <db@donbowman.ca> - 2017-04-26 03:10 +0200
  Re: ipsec doesn't route TCP with 4.11 kernel Joseph Salisbury <joseph.salisbury@canonical.com> - 2017-04-26 21:10 +0200
    Re: ipsec doesn't route TCP with 4.11 kernel Don Bowman <db@donbowman.ca> - 2017-04-28 00:40 +0200
      Re: ipsec doesn't route TCP with 4.11 kernel Joseph Salisbury <joseph.salisbury@canonical.com> - 2017-05-01 16:00 +0200
  Re: ipsec doesn't route TCP with 4.11 kernel Cong Wang <xiyou.wangcong@gmail.com> - 2017-04-27 07:10 +0200
    Re: ipsec doesn't route TCP with 4.11 kernel Steffen Klassert <steffen.klassert@secunet.com> - 2017-04-27 11:00 +0200
      Re: ipsec doesn't route TCP with 4.11 kernel Don Bowman <db@donbowman.ca> - 2017-04-28 00:20 +0200
      Re: ipsec doesn't route TCP with 4.11 kernel Steffen Klassert <steffen.klassert@secunet.com> - 2017-04-28 10:30 +0200
        Re: ipsec doesn't route TCP with 4.11 kernel Eric Dumazet <eric.dumazet@gmail.com> - 2017-04-28 18:50 +0200
          Re: ipsec doesn't route TCP with 4.11 kernel Steffen Klassert <steffen.klassert@secunet.com> - 2017-05-03 10:30 +0200
        Re: ipsec doesn't route TCP with 4.11 kernel Don Bowman <db@donbowman.ca> - 2017-04-30 02:50 +0200
          Re: ipsec doesn't route TCP with 4.11 kernel Steffen Klassert <steffen.klassert@secunet.com> - 2017-05-03 10:20 +0200

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