Hi Mike, Sorry for missing this letter for so log time.
We use ovs vxlan and geneve tunnel tso in DPU scenario. Front virtio port in host set tso flag by ethtool -K ens26 tso on, Our Smart NIC has its own cpu where ovs running on it. Ovs has two Ports, one is vhost-user port, the other is Physical NIC which we want to Excete hardware tso. The vhost-user port receive packet from host virtio port. According to virtio flag which is set by ethtool, vhost-user port set the RTE_MBUF_F_TX_TCP_SEG flag in rte mbuf ol_flags. When packets transmit From vhost-user port to physical nic, large packets will be cutted by mtu in Physical nic. It is more Clearer by seeing the drawing in the attachment. Thanks Dexia -----邮件原件----- 发件人: Mike Pattrick <m...@redhat.com> 发送时间: 2023年8月10日 21:48 收件人: Simon Horman <ho...@ovn.org> 抄送: Dexia Li <dexia...@jaguarmicro.com>; ovs-dev@openvswitch.org; i.maxim...@ovn.org 主题: Re: [ovs-dev] [PATCH] userspace: support vxlan and geneve tunnel tso On Wed, Aug 9, 2023 at 11:19 AM Simon Horman <ho...@ovn.org> wrote: > > On Wed, Aug 09, 2023 at 06:42:21PM +0800, Dexia Li via dev wrote: > > The netdev receiving packets will be encapsulated if output port is > > tunnel type. Only support userspace vxlan or geneve tunnel tso and > > inner csum offload. Calculate innter l2/l3/l4 len before > > encapsulated and calculate out l2/l3 len after encapsulated. > > > > This func only support userspace tunnel tso so linux devices is not > > included. > > > > Signed-off-by: Dexia Li <dexia...@jaguarmicro.com> > > Hi Dexia, > > unfortunately I'm seeing the following check fail in CI with this > patch applied. > > - "dpif-netdev - check tx packet checksum offloading" > > Link: > https://github.com/ovsrobot/ovs/actions/runs/5808145405/job/1574435117 > 0#step:11:5577 Hello Dexia, Thank you for the contribution, TSO support for vxlan and geneve tunnels is really lacking right now. I haven't had a chance to thoroughly look at the code; but I tried testing out this patch in a vxlan setup and found that the checksums weren't being calculated. You note in the commit message that support is only extended to a limited usecase. Could you explain more about the setup that this works in? Thank you, M > _______________________________________________ > dev mailing list > d...@openvswitch.org > https://mail.openvswitch.org/mailman/listinfo/ovs-dev > _______________________________________________ dev mailing list d...@openvswitch.org https://mail.openvswitch.org/mailman/listinfo/ovs-dev
