[ovs-dev] [PATCH 00/25] netdev datapath vxlan offload

Eli Britstein elibr at mellanox.com
Mon Jan 20 15:08:05 UTC 2020

In the netdev datapath, packets arriving over a tunnel are processed by
more than one flow. For example a packet that should be decapsulated and
forwarded to another port is processed by two flows:
1. in_port=<PF>, outer-header matches, dst-port=4789 (VXLAN),
2. in_port=vxlan_sys_4789, tunnel matches (VNI for example),
   inner-header matches, actions: vm1.

In order to offload such a multi-flow processing path, a multi-table HW
model is used. Flow #1 matches are offloaded as is, but tnl_pop is
translated to MARK and JUMP to a tnl-port table actions. Flow #2 is
offloaded to that tnl-port table, its tunnel matches are translated to
outer-header matches, followed by the inner-header ones. The actions
start with an implicit DECAP action followed by the flow's actions.
The DECAP is done in flow #2. If it was done in flow #1, the outer
headers of the packets would have been lost, and they could not have
been matched in flow #2.
Furthermore, once the HW processing path is composed of a multi table
processing, there is a need to handle a case where the processing starts
in HW, but is not completed in HW. For example, only flow #1 is
offloaded while flow #2 doesn't exist. For that, the MARK value set in
the tnl_pop action is received in SW, the packet is recovered by the
mapped vport, and processing continues in SW.
As vports are virtual and cannot have rte_flows, offloading a vport
generates rte_flows for every PF in the system, as we cannot know from
which one the packets arrive from.

This series adds support for IPv6, tunnel push actions, and the
multi-table model for the decap processing.

v1 Travis passed: https://travis-ci.org/elibritstein/OVS/builds/639484233

Eli Britstein (14):
  dpif-netdev: Add mega ufid in flow add log
  netdev-offload-dpdk: Remove pre-validate of patterns function
  netdev-offload-dpdk: Add IPv6 pattern matching
  netdev-offload-dpdk: Support offload of clone tnl_push/output actions
  netdev-offload-dpdk: Support tnl/push using vxlan encap attribute
  netdev-offload: Don't use zero flow mark
  netdev-offload-dpdk: Introduce map APIs for table id and miss context
  netdev-offload-dpdk: Implement HW miss packet recover for vport
  netdev-offload-dpdk: Refactor disassociate ufid function
  netdev-offload-dpdk: Support tunnel pop action
  netdev-offload-dpdk: Implement flow dump create/destroy APIs
  netdev-dpdk: Getter function for dpdk devargs API
  netdev-dpdk: Introduce get netdev by devargs function
  netdev-dpdk-offload: Add vxlan pattern matching function

Ilya Maximets (4):
  netdev: Allow storing dpif type into netdev structure.
  netdev-offload: Use dpif type instead of class.
  netdev-offload: Allow offloading to netdev without ifindex.
  netdev-offload: Disallow offloading to unrelated tunneling vports.

Ophir Munk (6):
  dpif-netdev: Make mark allocation public API
  dpif-netdev: Add HW miss packet state recover logic
  netdev-dpdk: Introduce an API to query if a dpdk port is an uplink
  netdev-dpdk-offload: Infrastructure for multiple rte_flows per UFID
  netdev-dpdk: Add flow_api support for netdev vxlan vports
  netdev-offload-dpdk: Support offload for vxlan vport

Oz Shlomo (1):
  netdev-offload: Add HW miss packet state recover API

 Documentation/howto/dpdk.rst  |    5 +-
 NEWS                          |    6 +-
 lib/dpif-netdev.c             |   70 +--
 lib/dpif-netlink.c            |   23 +-
 lib/dpif.c                    |   21 +-
 lib/netdev-dpdk.c             |   68 +++
 lib/netdev-dpdk.h             |    6 +
 lib/netdev-offload-dpdk.c     | 1275 +++++++++++++++++++++++++++++++++++------
 lib/netdev-offload-provider.h |    6 +
 lib/netdev-offload-tc.c       |   11 +-
 lib/netdev-offload.c          |  115 ++--
 lib/netdev-offload.h          |   23 +-
 lib/netdev-provider.h         |    3 +-
 lib/netdev.c                  |   16 +
 lib/netdev.h                  |    2 +
 ofproto/ofproto-dpif-upcall.c |    5 +-
 tests/dpif-netdev.at          |   14 +-
 tests/ofproto-macros.at       |    3 +-
 18 files changed, 1394 insertions(+), 278 deletions(-)


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