netdev - [PATCH v4 0/3] packet: deliver VLAN TPID to userspace

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Message-ID: <87haa77fe3.wl%atzm@stratosphere.co.jp>
Date:	Tue, 17 Dec 2013 22:53:24 +0900
From:	Atzm Watanabe <atzm@...atosphere.co.jp>
To:	netdev@...r.kernel.org
Cc:	"Stephen Hemminger" <stephen@...workplumber.org>,
	"Ben Hutchings" <bhutchings@...arflare.com>,
	"David Miller" <davem@...emloft.net>,
	"Daniel Borkmann" <dborkman@...hat.com>,
	"David Laight" <David.Laight@...LAB.COM>
Subject: [PATCH v4 0/3] packet: deliver VLAN TPID to userspace

This patchset enables userspace to get VLAN TPID as well as the VLAN TCI.

After the 802.1AD support, userspace packet receivers (packet dumper,
software switch, and the like) need how to know VLAN TPID in order to
reconstruct original tagged frame.

v4: Simply use sizeof(tp_padding) for zeroing the padding bytes,
    commented by David Laight.
    Use __u16 for tp_vlan_tpid in tpacket_hdr_variant1,
    commented by Daniel Borkmann.

v3: Add a definition which indicates whether tp_vlan_tpid is valid.
    Explicitly define pad bytes for tpacket{2,3}_hdr and pick the area
    for tp_vlan_tpid from the definition.  Commented by David Laight.

v2: Add BUILD_BUG_ON() to make current aligned size of
    struct tpacket{2,3}_hdr clear.  Commented by Ben Hutchings.

Atzm Watanabe (3):
  packet: make aligned size of struct tpacket{2,3}_hdr clear
  packet: fill the gap of TPACKET_ALIGNMENT with zeros
  packet: deliver VLAN TPID to userspace

 include/uapi/linux/if_packet.h | 23 ++++++++++++++---------
 net/packet/af_packet.c         | 24 +++++++++++++++++++-----
 2 files changed, 33 insertions(+), 14 deletions(-)

-- 
1.8.1.5

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