netdev - Re: [PATCH net-next] net-gre-gro: Fix a bug that breaks the forwarding path

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Message-ID: <CAJZOPZJGyTdSB2LZcqrXcYdJAJsZfAmRDj4vUMBASfZQr6Pj_Q@mail.gmail.com>
Date:	Wed, 16 Jul 2014 15:12:02 +0300
From:	Or Gerlitz <or.gerlitz@...il.com>
To:	Tom Herbert <therbert@...gle.com>
Cc:	Jerry Chu <hkchu@...gle.com>, Eric Dumazet <edumazet@...gle.com>,
	Or Gerlitz <ogerlitz@...lanox.com>,
	Wolfgang Walter <linux@...m.de>,
	David Miller <davem@...emloft.net>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next] net-gre-gro: Fix a bug that breaks the
 forwarding path

On Tue, Jul 15, 2014 at 9:44 PM, Tom Herbert <therbert@...gle.com> wrote:
> Unfortunately, skb->encapsulation is overloaded with different
> meanings in TX and RX path. I think the invariant should be that if it
> is set, the inner headers are valid, so this is currently only useful
> on TX. For Rx, where it's used to indicate inner checksum was validated

I think what Jerry is trying to say here is that the TX part of the
forwarding path uses some pre-knowledge
from the RX part which sets some fields

> I intend to a add a separate field in skbuf (probably two
> bits to allow for multiple level encapsulations).
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