Re: [PATCH net-next v11 4/6] openvswitch: add support to push and pop mpls for layer3 packets

Allow push and pop mpls actions to act on layer 3 packets by teaching
them not to access non-existent L2 headers of such packets.

Signed-off-by: Simon Horman <redacted>
---
v11
* group l2 code in pop_mpls()

v10
* Limit scope of hdr in {push,pop}_mpls()

v9
* New Patch
---
 include/uapi/linux/openvswitch.h |  2 ++
 net/openvswitch/actions.c        | 24 +++++++++++++++---------
 2 files changed, 17 insertions(+), 9 deletions(-)

diff --git a/include/uapi/linux/openvswitch.h b/include/uapi/linux/openvswitch.h
index d95a3018f6a1..5cde501433eb 100644
--- a/include/uapi/linux/openvswitch.h
+++ b/include/uapi/linux/openvswitch.h

@@ -737,6 +737,8 @@ enum ovs_nat_attr {
  * is no MPLS label stack, as determined by ethertype, no action is taken.
  * @OVS_ACTION_ATTR_CT: Track the connection. Populate the conntrack-related
  * entries in the flow key.
+ * @OVS_ACTION_ATTR_PUSH_ETH: Push a new outermost Ethernet header onto the      * packet.
+ * @OVS_ACTION_ATTR_POP_ETH: Pop the outermost Ethernet header off the packet.
  *
  * Only a single header can be set with a single %OVS_ACTION_ATTR_SET.  Not all
  * fields within a header are modifiable, e.g. the IPv4 protocol and fragment

diff --git a/net/openvswitch/actions.c b/net/openvswitch/actions.c
index 1ecbd7715f6d..12e8a8942a42 100644
--- a/net/openvswitch/actions.c
+++ b/net/openvswitch/actions.c