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From: David Miller <davem@davemloft.net>
Subject: Re: [PATCH v3 net-next 2/2] tc: add 'needs_l2' flag to ingress
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Date: Wed, 08 Apr 2015 23:14:56 -0400 (EDT)
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From: Alexei Starovoitov <ast@plumgrid.com>
Date: Wed, 08 Apr 2015 20:05:13 -0700

> I'm sure there is a way to propagate the offset into the programs.
> It's not about efficiency of programs, but about consistency.
> Programs should know nothing about kernel. Sending network offset
> into them is exposing this very specific kernel behavior.

It can be performed by the data access helpers the JIT'd programs
have to invoke anyways.