[ovs-git] [openvswitch/ovs] e14fbd: datapath-windows: Append tunnel info to upcall for...

[Alin Gabriel Serdean]

  Branch: refs/heads/master
  Home:   https://github.com/openvswitch/ovs
  Commit: e14fbdbb5ba137884095caa849735a78ffef0da0
      https://github.com/openvswitch/ovs/commit/e14fbdbb5ba137884095caa849735a78ffef0da0
  Author: Amber Hu via dev <ovs-dev at openvswitch.org>
  Date:   2020-02-10 (Mon, 10 Feb 2020)

  Changed paths:
    M datapath-windows/ovsext/Actions.c
    M datapath-windows/ovsext/Flow.c
    M datapath-windows/ovsext/Tunnel.c
    M datapath-windows/ovsext/User.c
    M datapath-windows/ovsext/User.h

  Log Message:
  -----------
  datapath-windows: Append tunnel info to upcall for correct template

Formerly, there is no tunnel information appended in the upcall’s
packet data, which is expected by IPFIX in userspace to calculate
the template for exporting the sampled flow record of on egress
tunnel port.
To fix this, during performing OvsOutputUserspaceAction(), we
would check whether it is initiated by the sampling on egress
tunnel which would be indicated by the attribute as
OVS_USERSPACE_ATTR_EGRESS_TUN_PORT in the nested attribute
list. If so, we would append the tunKey in OvsForwardingContext
indexed by OVS_PACKET_ATTR_EGRESS_TUN_KEY to the upcall.
Besides, at this point, the source transport port and  source ip
address are not available in the structure, so we have to fill it in the
way how the packet would be capsulated during performing
OvsEncapGeneve(), which is following the
OvsOutputUserspaceAction() unfortunately.
I have tested the IPFIX functionality with the change, we could see the
template is correct and the expected tunnel information could be
packed in the IPFIX packet finally. The traffic for test is generated by
PING utility.

>From d727d051c9a44a4a93e5ee5f3da3ca9b125aad29 Mon Sep 17 00:00:00 2001
From: Amber Hu <qhu at vmware.com>
Date: Thu, 30 Jan 2020 18:01:32 -0800
Subject: [PATCH v3] datapath-windows: Append tunnel info to upcall for correct
 template

Signed-off-by: Amber Hu <qhu at vmware.com>
Acked-by: Alin Gabriel Serdean <aserdean at ovn.org>
Signed-off-by: Alin Gabriel Serdean <aserdean at ovn.org>