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openvswitch: 802.1AD Flow handling, actions, vlan parsing, netlink attributes

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Add support for 802.1ad including the ability to push and pop double
tagged vlans. Add support for 802.1ad to netlink parsing and flow
conversion. Uses double nested encap attributes to represent double
tagged vlan. Inner TPID encoded along with ctci in nested attributes.

This is based on Thomas F Herbert's original v20 patch. I made some
small clean ups and bug fixes.

Signed-off-by: Thomas F Herbert <thomasfherbert@gmail.com>
Signed-off-by: Eric Garver <e@erig.me>
Acked-by: Pravin B Shelar <pshelar@ovn.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Garver
2016-09-07 12:56:59 -04:00
committed by David S. Miller
parent fe19c4f971
commit 018c1dda5f
5 changed files with 282 additions and 124 deletions
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net/openvswitch/vport.c
+6 -1
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@@ -485,9 +485,14 @@ static unsigned int packet_length(const struct sk_buff *skb)
{
unsigned int length = skb->len - ETH_HLEN;
if (skb->protocol == htons(ETH_P_8021Q))
if (skb_vlan_tagged(skb))
length -= VLAN_HLEN;
/* Don't subtract for multiple VLAN tags. Most (all?) drivers allow
* (ETH_LEN + VLAN_HLEN) in addition to the mtu value, but almost none
* account for 802.1ad. e.g. is_skb_forwardable().
*/
return length;
}