netdev - Re: [PATCH net,v2] ip_tunnel: fix ipv4 pmtu check to honor inner ip header df

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Message-Id: <20150708.160333.436760090755596682.davem@davemloft.net>
Date:	Wed, 08 Jul 2015 16:03:33 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	timo.teras@....fi
Cc:	netdev@...r.kernel.org, pshelar@...ira.com
Subject: Re: [PATCH net,v2] ip_tunnel: fix ipv4 pmtu check to honor inner
 ip header df

From: Timo Teräs <timo.teras@....fi>
Date: Tue,  7 Jul 2015 08:34:13 +0300

> Frag needed should be sent only if the inner header asked
> to not fragment. Currently fragmentation is broken if the
> tunnel has df set, but df was not asked in the original
> packet. The tunnel's df needs to be still checked to update
> internally the pmtu cache.
> 
> Commit 23a3647bc4f93bac broke it, and this commit fixes
> the ipv4 df check back to the way it was.
> 
> Fixes: 23a3647bc4f93bac ("ip_tunnels: Use skb-len to PMTU check.")
> Cc: Pravin B Shelar <pshelar@...ira.com>
> Signed-off-by: Timo Teräs <timo.teras@....fi>

Applied and queued up for -stable, thanks.
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