netdev - Re: [PATCH v3 3/3] packet: Deliver VLAN TPID to userspace

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Message-ID: <20131216092509.1b3d76b3@nehalam.linuxnetplumber.net>
Date:	Mon, 16 Dec 2013 09:25:09 -0800
From:	Stephen Hemminger <stephen@...workplumber.org>
To:	Atzm Watanabe <atzm@...atosphere.co.jp>
Cc:	netdev@...r.kernel.org,
	"Ben Hutchings" <bhutchings@...arflare.com>,
	"David Miller" <davem@...emloft.net>,
	"Daniel Borkmann" <dborkman@...hat.com>,
	"David Laight" <David.Laight@...LAB.COM>
Subject: Re: [PATCH v3 3/3] packet: Deliver VLAN TPID to userspace

On Mon, 16 Dec 2013 17:12:09 +0900
Atzm Watanabe <atzm@...atosphere.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.
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