Re: [PATCH v3 0/4] Vhost-vdpa Shadow Virtqueue VLAN support

[Lei Yang <leiyang@redhat.com>]

QE tested v3 of this series using the test steps provided by Hawkins
and everything works fine.

Tested-by: Lei Yang <leiyang@redhat.com>

On Sun, Jul 23, 2023 at 8:10 PM Hawkins Jiawei <yin31149@gmail.com> wrote:
>
> This series enables shadowed CVQ to intercept VLAN commands
> through shadowed CVQ, update the virtio NIC device model
> so qemu send it in a migration, and the restore of that
> VLAN state in the destination.
>
> ChangeLog
> =========
> v3:
>  - remove the extra "From" line in patch 1
> "virtio-net: do not reset vlan filtering at set_features"
>
> v2: https://lore.kernel.org/all/cover.1690100802.git.yin31149@gmail.com/
>  - remove the extra line pointed out by Eugenio in patch 3
> "vdpa: Restore vlan filtering state"
>
> v1: https://lore.kernel.org/all/cover.1689690854.git.yin31149@gmail.com/
>  - based on patch "[PATCH 0/3] Vhost-vdpa Shadow Virtqueue VLAN support"
> at https://lists.gnu.org/archive/html/qemu-devel/2022-09/msg01016.html
>  - move `MAX_VLAN` macro to include/hw/virtio/virtio-net.h
> instead of net/vhost-vdpa.c
>  - fix conflicts with the master branch
>
>
> TestStep
> ========
> 1. test the migration using vp-vdpa device
>   - For L0 guest, boot QEMU with two virtio-net-pci net device with
> `ctrl_vq`, `ctrl_vlan` features on, command line like:
>       -device virtio-net-pci,disable-legacy=on,disable-modern=off,
> iommu_platform=on,mq=on,ctrl_vq=on,guest_announce=off,
> indirect_desc=off,queue_reset=off,ctrl_vlan=on,...
>
>   - For L1 guest, apply the patch series and compile the source code,
> start QEMU with two vdpa device with svq mode on, enable the `ctrl_vq`,
> `ctrl_vlan` features on, command line like:
>       -netdev type=vhost-vdpa,x-svq=true,...
>       -device virtio-net-pci,mq=on,guest_announce=off,ctrl_vq=on,
> ctrl_vlan=on,...
>
>   - For L2 source guest, run the following bash command:
> ```bash
> #!/bin/sh
>
> for idx in {1..4094}
> do
>   ip link add link eth0 name vlan$idx type vlan id $idx
> done
> ```
>
>   - gdb attaches the L2 dest VM and break at the
> vhost_vdpa_net_load_single_vlan(), and execute the following
> gdbscript
> ```gdbscript
> ignore 1 4094
> c
> ```
>
>   - Execute the live migration in L2 source monitor
>
>   - Result
>     * with this series, gdb can hit the breakpoint and continue
> the executing without triggering any error or warning.
>
> Eugenio Pérez (1):
>   virtio-net: do not reset vlan filtering at set_features
>
> Hawkins Jiawei (3):
>   virtio-net: Expose MAX_VLAN
>   vdpa: Restore vlan filtering state
>   vdpa: Allow VIRTIO_NET_F_CTRL_VLAN in SVQ
>
>  hw/net/virtio-net.c            |  6 +----
>  include/hw/virtio/virtio-net.h |  6 +++++
>  net/vhost-vdpa.c               | 49 ++++++++++++++++++++++++++++++++++
>  3 files changed, 56 insertions(+), 5 deletions(-)
>
> --
> 2.25.1
>
>