From: Ben Greear <greearb@candelatech.com>
Date: Wed, 1 Jun 2011 06:49:10 +0000 (+0000)
Subject: af-packet: Add flag to distinguish VID 0 from no-vlan.
X-Git-Tag: v3.0-rc2~7^2~6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a3bcc23e890a6d49d6763d9eb073d711de2e0469;p=pandora-kernel.git

af-packet: Add flag to distinguish VID 0 from no-vlan.

Currently, user-space cannot determine if a 0 tcp_vlan_tci
means there is no VLAN tag or the VLAN ID was zero.

Add flag to make this explicit.  User-space can check for
TP_STATUS_VLAN_VALID || tp_vlan_tci > 0, which will be backwards
compatible. Older could would have just checked for tp_vlan_tci,
so it will work no worse than before.

Signed-off-by: Ben Greear <greearb@candelatech.com>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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