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

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Date:	Thu, 7 Jul 2016 13:52:47 -0700
From:	pravin shelar <pshelar@....org>
To:	Simon Horman <simon.horman@...ronome.com>
Cc:	Linux Kernel Network Developers <netdev@...r.kernel.org>,
	ovs dev <dev@...nvswitch.org>
Subject: Re: [ovs-dev] [PATCH net-next v11 4/6] openvswitch: add support to
 push and pop mpls for layer3 packets

On Wed, Jul 6, 2016 at 10:59 AM, Simon Horman
<simon.horman@...ronome.com> wrote:
> 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 <simon.horman@...ronome.com>
> ---
> 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

This hunk is not related to this patch.
> 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
...