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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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16
net/openvswitch/actions.c
View file

@ -246,20 +246,24 @@ static int pop_vlan(struct sk_buff *skb, struct sw_flow_key *key)
int err;
err = skb_vlan_pop(skb);
if (skb_vlan_tag_present(skb))
if (skb_vlan_tag_present(skb)) {
invalidate_flow_key(key);
else
key->eth.tci = 0;
} else {
key->eth.vlan.tci = 0;
key->eth.vlan.tpid = 0;
}
return err;
}
static int push_vlan(struct sk_buff *skb, struct sw_flow_key *key,
const struct ovs_action_push_vlan *vlan)
{
if (skb_vlan_tag_present(skb))
if (skb_vlan_tag_present(skb)) {
invalidate_flow_key(key);
else
key->eth.tci = vlan->vlan_tci;
} else {
key->eth.vlan.tci = vlan->vlan_tci;
key->eth.vlan.tpid = vlan->vlan_tpid;
}
return skb_vlan_push(skb, vlan->vlan_tpid,
ntohs(vlan->vlan_tci) & ~VLAN_TAG_PRESENT);
}