netdev - Re: [Patch net] vxlan: use dev->needed_headroom instead of dev->hard_header

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Date:	Fri, 13 Jun 2014 15:29:26 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	xiyou.wangcong@...il.com
Cc:	netdev@...r.kernel.org, stephen@...workplumber.org,
	pshelar@...ira.com, cwang@...pensource.com
Subject: Re: [Patch net] vxlan: use dev->needed_headroom instead of
 dev->hard_header_len

From: Cong Wang <xiyou.wangcong@...il.com>
Date: Thu, 12 Jun 2014 11:53:10 -0700

> From: Cong Wang <cwang@...pensource.com>
> 
> When we mirror packets from a vxlan tunnel to other device,
> the mirror device should see the same packets (that is, without
> outer header). Because vxlan tunnel sets dev->hard_header_len,
> tcf_mirred() resets mac header back to outer mac, the mirror device
> actually sees packets with outer headers
> 
> Vxlan tunnel should set dev->needed_headroom instead of
> dev->hard_header_len, like what other ip tunnels do. This fixes
> the above problem.
> 
> Cc: "David S. Miller" <davem@...emloft.net>
> Cc: stephen hemminger <stephen@...workplumber.org>
> Cc: Pravin B Shelar <pshelar@...ira.com>
> Signed-off-by: Cong Wang <cwang@...pensource.com>
> Signed-off-by: Cong Wang <xiyou.wangcong@...il.com>

This looks good, and as you say consistent with how other IP tunnel
types are handled.

Applied, and queued up for -stable, thanks.
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