From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stephen Hemminger <stephen@networkplumber.org>
Subject: Re: [PATCH v3 3/3] packet: Deliver VLAN TPID to userspace
Date: Mon, 16 Dec 2013 09:25:09 -0800
Message-ID: <20131216092509.1b3d76b3@nehalam.linuxnetplumber.net>
References: <87mwk16wpy.wl%atzm@stratosphere.co.jp>
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Cc: netdev@vger.kernel.org,
	"Ben Hutchings" <bhutchings@solarflare.com>,
	"David Miller" <davem@davemloft.net>,
	"Daniel Borkmann" <dborkman@redhat.com>,
	"David Laight" <David.Laight@ACULAB.COM>
To: Atzm Watanabe <atzm@stratosphere.co.jp>
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On Mon, 16 Dec 2013 17:12:09 +0900
Atzm Watanabe <atzm@stratosphere.co.jp> wrote:

>  struct tpacket_hdr_variant1 {
>  	__u32	tp_rxhash;
>  	__u32	tp_vlan_tci;
> +	__u32	tp_vlan_tpid;
>  };

Is this safe? Won't you break ABI for existing userspace applications.