netdev - Re: [V4] dev : fix mtu check when TSO is enabled

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Message-Id: <20110330.024231.57465584.davem@davemloft.net>
Date:	Wed, 30 Mar 2011 02:42:31 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	daniel@...e.fr
Cc:	ebiederm@...ssion.com, eric.dumazet@...il.com, kaber@...sh.net,
	nightnord@...il.com, netdev@...r.kernel.org
Subject: Re: [V4] dev : fix mtu check when TSO is enabled

From: Daniel Lezcano <daniel@...e.fr>
Date: Wed, 30 Mar 2011 11:40:35 +0200

> From: Daniel Lezcano <daniel.lezcano@...e.fr>
> 
> In case the device where is coming from the packet has TSO enabled,
> we should not check the mtu size value as this one could be bigger
> than the expected value.
> 
> This is the case for the macvlan driver when the lower device has
> TSO enabled. The macvlan inherit this feature and forward the packets
> without fragmenting them. Then the packets go through dev_forward_skb
> and are dropped. This patch fix this by checking TSO is not enabled
> when we want to check the mtu size.
> 
> Signed-off-by: Daniel Lezcano <daniel.lezcano@...e.fr>
> Acked-by: "Eric W. Biederman" <ebiederm@...ssion.com>

Applied.
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