[ovs-dev] [PATCH 0/7] userspace: Support for L3 tunneling

Jan Scheurich jan.scheurich at ericsson.com
Fri Feb 3 10:37:43 UTC 2017


This patch set is part of an initiative to deal with non-Ethernet packets in OVS for advanced use cases like L3 tunneling or NSH. The initiative is centering on the new OpenFlow concepts of "Packet type-aware pipeline" (PTAP) and "Generic encap/decap actions" (EXT-382). The overall design is documented in
https://docs.google.com/document/d/1oWMYUH8sjZJzWa72o2q9kU0N6pNE-rwZcLH3-kbbDR8

This patch series implements the user-space parts of the support for L3 tunnels connected to the legacy Ethernet-only pipeline in OVS.

In large parts it is an adaptation of the earlier work on L3 tunneling by Lorand Jakab, Simon Horman, Jiri Benc and Yi Yang, adapted to the new design for packet type aware pipelines as prototyped by Jean Tourrilhes.

It supersedes user-space patches 9-11 of the most recent patch set submitted by Yi Yang (https://mail.openvswitch.org/pipermail/ovs-dev/2016-December/326865.html). The remaining user-space parts of that series (VXLAN-GPE) will be superseded by further patches in the context of this initiative.

Key changes are the introduction of explicit packet_type fields in the dp_packet and flow structs, as well as a simpler handling of L3 tunnels limited to the ofproto layer.

   userspace: Add packet_type in dp_packet and flow
   userspace: Support for push_eth and pop_eth actions
   userspace: Switching of L3 packets in L2 pipeline
   ofproto-dpif-upcall: Intialize dump-seq of new flow to zero
   userspace: L3 tunnel support for GRE and LISP
   dpif-netlink: Don't send PACKET_TYPE to kernel
   ofproto-dpif-xlate: refactor compose_output_action__

For native L3 tunneling with the user-space datapath these patches are complete. To apply L3 tunneling to the kernel datapath, they are dependent on the following other contributions:

*       [PATCH net-next v13 0/8] openvswitch: support for layer 3 encapsulated packets
   https://mail.openvswitch.org/pipermail/ovs-dev/2016-November/324943.html
   The net-next patch has been accepted
*       [RFC PATCH v4 0/6] create tunnel devices using rtnetlink interface
https://mail.openvswitch.org/pipermail/ovs-dev/2017-January/327749.html
*       Another user-space patch to send the "layer3" option down via rtnetlink interface
*       Backports of the kernel datapath patches to the OVS tree module:
   Patches 01-08 of patch series [PATCH v2 00/17] port Jiri Benc's L3 patchset to ovs
   https://mail.openvswitch.org/pipermail/ovs-dev/2016-December/326865.html
*       A compatibility mechanism to send down "layer3" option to the backported kernel module to support older kernels.

To ease the progress with the implementation of the subsequent user-space patches for the PTAP, EXT-382 and NSH and avoid the pain of frequent re-basing of these large patch series, we would like to request exemption for merging the present patch series before the kernel datapath pieces are all in place.

 build-aux/extract-ofp-fields                      |   1 +
 datapath/linux/compat/include/linux/openvswitch.h |  19 +
 include/openflow/openflow-common.h                |   9 +
 include/openvswitch/flow.h                        |  30 +-
 include/openvswitch/match.h                       |   1 +
 include/openvswitch/meta-flow.h                   |  15 +-
 include/openvswitch/ofp-print.h                   |   9 +-
 lib/dp-packet.c                                   |   4 +
 lib/dp-packet.h                                   |  37 +-
 lib/dpif-netdev.c                                 |  62 ++--
 lib/dpif-netlink.c                                |  55 ++-
 lib/dpif.c                                        |   8 +-
 lib/flow.c                                        | 100 +++--
 lib/flow.h                                        |   9 +
 lib/match.c                                       |  21 +-
 lib/meta-flow.c                                   |   2 +
 lib/netdev-bsd.c                                  |   1 +
 lib/netdev-dummy.c                                |   5 +
 lib/netdev-linux.c                                |   4 +-
 lib/netdev-native-tnl.c                           |  27 +-
 lib/netdev-vport.c                                |  22 +-
 lib/netdev.h                                      |   1 +
 lib/nx-match.c                                    |   2 +-
 lib/odp-execute.c                                 |  19 +
 lib/odp-util.c                                    | 231 ++++++++++--
 lib/odp-util.h                                    |  15 +-
 lib/ofp-print.c                                   |  28 +-
 lib/ofp-util.c                                    |   2 +-
 lib/packets.c                                     |  45 +++
 lib/packets.h                                     |   5 +-
 lib/pcap-file.c                                   |   4 +-
 ofproto/ofproto-dpif-rid.h                        |   2 +-
 ofproto/ofproto-dpif-sflow.c                      |   8 +
 ofproto/ofproto-dpif-upcall.c                     |   6 +-
 ofproto/ofproto-dpif-xlate.c                      | 461 ++++++++++++++----------
 ofproto/ofproto-dpif.c                            |   6 +-
 ofproto/tunnel.c                                  |  15 +-
 tests/test-flows.c                                |   2 +-
 tests/tunnel-push-pop-ipv6.at                     |  25 +-
 tests/tunnel-push-pop.at                          |  45 ++-
 tests/tunnel.at                                   |  28 +-
 vswitchd/vswitch.xml                              |  13 +
 42 files changed, 1008 insertions(+), 396 deletions(-)



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