netdev - Transmitting 802.1p frames without 802.1q?

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Message-ID: <CAGVrzcZuhOV4-z8uTsT38kWDq1kcAedV_3OvXn0xsiMydRJERA@mail.gmail.com>
Date:	Wed, 12 Mar 2014 21:55:09 -0700
From:	Florian Fainelli <f.fainelli@...il.com>
To:	pedro.netdev@...devamos.com, Eric Dumazet <edumazet@...gle.com>,
	netdev <netdev@...r.kernel.org>,
	Patrick McHardy <kaber@...sh.net>
Subject: Transmitting 802.1p frames without 802.1q?

Hi Pedro, Eric, Patrick,

Commit ad1afb003939 vlan_dev: VLAN 0 should be treated as "no vlan
tag" (802.1p packet) did allow receiving 802.1p frames without
necessarily creating a VLAN w/ VID0 interface.

After setting up a VLAN interface with VID0, the packets are properly
tagged while being transmitted, but this also required the receiver to
have a  VLAN interface with VID0, which does not seem like it should
be required thanks to the above commit.

Should we have a special set of SO_PRIORITY values which will
automatically insert a VLAN tag with ID0 and PCP fields (like what
net/wireless/util.c::cfg80211_classify8021d does)?

Thanks!
-- 
Florian
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