tree c4156e932f081dc14a514d5ab23cd43e590029cd
parent 41be5a4a3668810bf3687a76c2b017bd437039e0
author Ben Greear <greearb@candelatech.com> 1306910950 +0000
committer David S. Miller <davem@davemloft.net> 1306988283 -0700

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>