netdev - Re: [PATCH net-next v3] filter: introduce SKF_AD_VLAN

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Message-ID: <55118011.60002@plumgrid.com>
Date:	Tue, 24 Mar 2015 08:17:37 -0700
From:	Alexei Starovoitov <ast@...mgrid.com>
To:	Michal Sekletar <msekleta@...hat.com>, netdev@...r.kernel.org
CC:	Daniel Borkmann <daniel@...earbox.net>,
	Jiri Pirko <jpirko@...hat.com>
Subject: Re: [PATCH net-next v3] filter: introduce SKF_AD_VLAN_TPID BPF extension

On 3/24/15 6:48 AM, Michal Sekletar wrote:
> If vlan offloading takes place then vlan header is removed from frame
> and its contents, both vlan_tci and vlan_proto, is available to user
> space via TPACKET interface. However, only vlan_tci can be used in BPF
> filters.
>
> This commit introduces a new BPF extension. It makes possible to load
> the value of vlan_proto (vlan TPID) to register A. Support for classic
> BPF and eBPF is being added, analogous to skb->protocol.
>
> Cc: Daniel Borkmann <daniel@...earbox.net>
> Cc: Alexei Starovoitov <ast@...mgrid.com>
> Cc: Jiri Pirko <jpirko@...hat.com>
>
> Signed-off-by: Michal Sekletar <msekleta@...hat.com>

Acked-by: Alexei Starovoitov <ast@...mgrid.com>


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