[Bug 1853592] Re: [SRU] hw-tc-offload not reliable with VXLAN with OpenStack

Mon Feb 10 10:08:01 UTC 2020

OVS with patch uploaded to eoan for SRU Team review.

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https://bugs.launchpad.net/bugs/1853592

Title:
  [SRU] hw-tc-offload not reliable with VXLAN with OpenStack

Status in Ubuntu Cloud Archive:
  Fix Released
Status in Ubuntu Cloud Archive train series:
  Triaged
Status in Ubuntu Cloud Archive ussuri series:
  Fix Released
Status in openvswitch package in Ubuntu:
  Fix Released
Status in openvswitch source package in Eoan:
  Triaged
Status in openvswitch source package in Focal:
  Fix Released

Bug description:
  [Impact]
  Hardware offload VXLAN tunnel flows may not be correctly offloaded and are hence not functional in OpenStack deployments

  [Test Case]
  Deploy OpenStack configured with suitable network cards for hardware offload of VM interfaces
  Boot instances with hardware offloaded interfaces (capability=switchdev)
  Instances may or may not get DHCP configured depending on how OpenStack chooses to tag the flows associated with the VXLAN tunnel networking for the cloud.

  [Regression Potential]
  Low; proposed patch has been tested with OpenStack Stein and has been peer reviewed and landed into all OVS stable branches back to v2.8 and will be included in the next 2.12.x release (which would target Eoan)

  [Original Bug Report]
  OpenStack Train
  OVS 2.12

  Linux 5.3 from hwe edge

  Connect-X 5 running latest firmware from Mellanox.

  Overlay networking configured with VXLAN for project networking.

  Some instances successfully DHCP, some don't.

  For those that don't:

  compute:

  11:51:24.926581 IP bond1.2925.node-laveran.maas.58901 > bond1.2925.node-lepaute.maas.4789: VXLAN, flags [I] (0x08), vni 1233
  IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from fa:16:3e:e8:59:f3 (oui Unknown), length 300

  gateway:

  11:50:44.010864 IP bond1.2925.node-laveran.maas.58901 > bond1.2925.node-lepaute.maas.4789: VXLAN, flags [I] (0x08), vni 1233
  IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request from fa:16:3e:e8:59:f3 (oui Unknown), length 300
  11:50:44.011196 IP bond1.2925.node-lepaute.maas.55067 > bond1.2925.node-laveran.maas.4789: VXLAN, flags [I] (0x08), vni 1233
  IP 172.16.0.2.bootps > 172.16.2.236.bootpc: BOOTP/DHCP, Reply, length 328

  The response is send from the gateway unit to the compute unit, but is
  never seen in the tcpdump.

  If hardware encap is disabled on the two underlying ports/the card,
  traffic flow is seen and all instances correctly DHCP configure on
  boot.

   sudo ethtool -K enp3s0f0 hw-tc-offload off
   sudo ethtool -K enp3s0f1 hw-tc-offload off

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: linux-image-5.3.0-23-generic 5.3.0-23.25~18.04.1
  ProcVersionSignature: Ubuntu 5.3.0-23.25~18.04.1-generic 5.3.7
  Uname: Linux 5.3.0-23-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.9
  Architecture: amd64
  Date: Fri Nov 22 12:29:20 2019
  ProcEnviron:
   TERM=screen-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=C.UTF-8
   SHELL=/bin/bash
  SourcePackage: linux-signed-hwe-edge
  UpgradeStatus: No upgrade log present (probably fresh install)
  ---
  ProblemType: Bug
  AlsaDevices:
   total 0
   crw-rw---- 1 root audio 116,  1 Nov 19 16:45 seq
   crw-rw---- 1 root audio 116, 33 Nov 19 16:45 timer
  AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay'
  ApportVersion: 2.20.9-0ubuntu7.9
  Architecture: amd64
  ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord': 'arecord'
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
  DistroRelease: Ubuntu 18.04
  IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig'
  Lsusb:
   Bus 002 Device 002: ID 8087:8002 Intel Corp.
   Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 001 Device 003: ID 413c:a001 Dell Computer Corp. Hub
   Bus 001 Device 002: ID 8087:800a Intel Corp.
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: Dell Inc. PowerEdge R630
  Package: linux (not installed)
  PciMultimedia:

  ProcEnviron:
   TERM=screen-256color
   PATH=(custom, no user)
   LANG=C.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 mgag200drmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.3.0-23-generic root=UUID=2ff5e234-ee62-4bce-8266-cd9aa78c532f ro intel_iommu=on iommu=pt probe_vf=0
  ProcVersionSignature: Ubuntu 5.3.0-23.25~18.04.1-generic 5.3.7
  RelatedPackageVersions:
   linux-restricted-modules-5.3.0-23-generic N/A
   linux-backports-modules-5.3.0-23-generic  N/A
   linux-firmware                            1.173.12
  RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill'
  Tags:  bionic uec-images
  Uname: Linux 5.3.0-23-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:

  _MarkForUpload: True
  dmi.bios.date: 11/08/2016
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 2.3.4
  dmi.board.name: 02C2CP
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A03
  dmi.chassis.type: 23
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvr2.3.4:bd11/08/2016:svnDellInc.:pnPowerEdgeR630:pvr:rvnDellInc.:rn02C2CP:rvrA03:cvnDellInc.:ct23:cvr:
  dmi.product.name: PowerEdge R630
  dmi.product.sku: SKU=NotProvided;ModelName=PowerEdge R630
  dmi.sys.vendor: Dell Inc.

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