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

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Message-ID: <20150324154409.GD2050@nanopsycho.orion>
Date:	Tue, 24 Mar 2015 16:44:09 +0100
From:	Jiri Pirko <jpirko@...hat.com>
To:	Michal Sekletar <msekleta@...hat.com>
Cc:	netdev@...r.kernel.org, Daniel Borkmann <daniel@...earbox.net>,
	Alexei Starovoitov <ast@...mgrid.com>
Subject: Re: [PATCH net-next v3] filter: introduce SKF_AD_VLAN_TPID BPF
 extension

Tue, Mar 24, 2015 at 02:48:41PM CET, msekleta@...hat.com 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>

Reviewed-by: Jiri Pirko <jiri@...nulli.us>
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