netdev - Re: [PATCH] filter: introduce SKF_AD_VLAN

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Date:	Thu, 05 Mar 2015 12:40:42 -0800
From:	Alexei Starovoitov <ast@...mgrid.com>
To:	Daniel Borkmann <daniel@...earbox.net>,
	Michal Sekletar <msekleta@...hat.com>
CC:	netdev@...r.kernel.org, Jiri Pirko <jpirko@...hat.com>,
	guy@...m.mit.edu, atzm@...atosphere.co.jp
Subject: Re: [PATCH] filter: introduce SKF_AD_VLAN_PROTO BPF extension

On 3/5/15 12:03 PM, Daniel Borkmann wrote:
> On 03/05/2015 05:52 PM, Alexei Starovoitov wrote:
>> imo there is a benefit of giving programs more visibility into
>> skb metadata.
>
> I'm not really a big fan of it, but given we added commit a0cdfcf39362
> ("packet: deliver VLAN TPID to userspace") to packet sockets ...

good point, since skb->vlan_proto is already exposed to user space
via that commit, it makes sense to let bpf see it as well.
For consistency with tpacket, I'd call it SKF_AD_VLAN_TPID

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