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.
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 | 50 ++++++++++++++++++++++++++++++++++
3 files changed, 57 insertions(+), 5 deletions(-)
--
2.25.1
