netdev - Re: [PATCH net-next 13/18] net: Add offload kernel net stack packet type

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Date:	Fri, 17 Jun 2016 08:12:04 -0700
From:	Eric Dumazet <edumazet@...gle.com>
To:	Saeed Mahameed <saeedm@...lanox.com>
Cc:	"David S. Miller" <davem@...emloft.net>,
	netdev <netdev@...r.kernel.org>,
	Doug Ledford <dledford@...hat.com>,
	Or Gerlitz <ogerlitz@...lanox.com>,
	Maor Gottlieb <maorg@...lanox.com>,
	Huy Nguyen <huyn@...lanox.com>, Tal Alon <talal@...lanox.com>,
	Patrick McHardy <kaber@...sh.net>
Subject: Re: [PATCH net-next 13/18] net: Add offload kernel net stack packet type

On Fri, Jun 17, 2016 at 7:43 AM, Saeed Mahameed <saeedm@...lanox.com> wrote:
> From: Maor Gottlieb <maorg@...lanox.com>
>
> Add new packet type to skip kernel specific protocol handlers.
>
> This is needed so device drivers can pass packets up to user space
> (af_packet/tcpdump, etc..) without the need for them to go through
> the whole kernel data path.
>
> Signed-off-by: Maor Gottlieb <maorg@...lanox.com>
> CC: David S. Miller <davem@...emloft.net>
> CC: Patrick McHardy <kaber@...sh.net>
> CC: Eric Dumazet <edumazet@...gle.com>
> Signed-off-by: Saeed Mahameed <saeedm@...lanox.com>

This breaks BPF quite badly.

git grep SKF_AD_PKTTYPE