Bug 1817986

Description of problem:
hostdev interface with teaming setting will not be hotplugged on target host during postcopy migration

Version-Release number of selected component (if applicable):
# rpm -q libvirt-libs qemu-kvm kernel
libvirt-libs-6.0.0-15.module+el8.2.0+6106+b6345808.x86_64
qemu-kvm-4.2.0-16.module+el8.2.0+6092+4f2391c1.x86_64
kernel-4.18.0-187.el8.x86_64

How reproducible:
100%

Steps to Reproduce:
1. Prepare vm with below interfaces about netowrk failover:
<interface type='network'>
      <mac address='fe:54:00:d2:24:55'/>
      <source network='hostdevnet'/>
      <model type='virtio'/>
      <teaming type='transient' persistent='ua-backup0'/>
      <address type='pci' domain='0x0000' bus='0x01' slot='0x00' function='0x0'/>
    </interface>
    <interface type='network'>
      <mac address='fe:54:00:d2:24:55'/>
      <source network='persistent-net'/>
      <model type='virtio'/>
      <teaming type='persistent'/>
      <alias name='ua-backup0'/>
      <address type='pci' domain='0x0000' bus='0x07' slot='0x00' function='0x0'/>
    </interface>

# virsh net-dumpxml hostdevnet
<network connections='1'>
  <name>hostdevnet</name>
  <uuid>0b378c46-c023-455e-b8d6-532ce4bca4e6</uuid>
  <forward mode='hostdev' managed='yes'>
    <address type='pci' domain='0x0000' bus='0x04' slot='0x10' function='0x1'/>
    <address type='pci' domain='0x0000' bus='0x04' slot='0x10' function='0x3'/>
  </forward>
</network>

# virsh net-dumpxml persistent-net
<network connections='1'>
  <name>persistent-net</name>
  <uuid>88ea7bd7-4a67-497d-a68b-0559083812f4</uuid>
  <forward dev='eno1' mode='bridge'>
    <interface dev='eno1' connections='1'/>
  </forward>
</network>

2. start the vm and check on the vm, there are 3 interfaces as below, which is as expected;
# ifconfig
enp1s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 10.73.33.*  netmask 255.255.254.0  broadcast 10.73.33.255
        inet6 fe80::fc54:ff:fed2:2455  prefixlen 64  scopeid 0x20<link>
        ether fe:54:00:d2:24:55  txqueuelen 1000  (Ethernet)
        RX packets 32  bytes 8163 (7.9 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 74  bytes 7540 (7.3 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

enp7s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 10.73.33.*  netmask 255.255.254.0  broadcast 10.73.33.255
        inet6 2620:52:0:4920:e304:603e:2a0f:317d  prefixlen 64  scopeid 0x0<global>
        inet6 fe80::f18c:7fce:cb0a:10e6  prefixlen 64  scopeid 0x20<link>
        ether fe:54:00:d2:24:55  txqueuelen 1000  (Ethernet)
        RX packets 37  bytes 9227 (9.0 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 84  bytes 9024 (8.8 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

enp7s0nsby: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet6 fe80::57f4:871f:9610:c42d  prefixlen 64  scopeid 0x20<link>
        ether fe:54:00:d2:24:55  txqueuelen 1000  (Ethernet)
        RX packets 5  bytes 1064 (1.0 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 10  bytes 1484 (1.4 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
...
3. do migration with post-copy enabled
# virsh migrate rhel qemu+ssh://per37/system --live --verbose --postcopy 

when migration in progress, open another console to run:
# virsh migrate-postcopy rhel

4. After migration finished, check the vm on target host, there are only 2 interfaces, the hostdev interface is not hotplugged back
enp7s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 10.73.33.198  netmask 255.255.254.0  broadcast 10.73.33.255
        inet6 2620:52:0:4920:e304:603e:2a0f:317d  prefixlen 64  scopeid 0x0<global>
        inet6 fe80::f18c:7fce:cb0a:10e6  prefixlen 64  scopeid 0x20<link>
        ether fe:54:00:d2:24:55  txqueuelen 1000  (Ethernet)
        RX packets 304  bytes 35042 (34.2 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 110  bytes 13814 (13.4 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

enp7s0nsby: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        ether fe:54:00:d2:24:55  txqueuelen 1000  (Ethernet)
        RX packets 220  bytes 13964 (13.6 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 79  bytes 12302 (12.0 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

# dmesg   |egrep 'eth|enp'
[    5.482422] virtio_net virtio4 eth0: failover master:eth0 registered
[    5.484439] virtio_net virtio4 eth0: failover standby slave:eth1 registered
[    5.490480] virtio_net virtio4 enp7s0nsby: renamed from eth1
[    5.499198] virtio_net virtio4 enp7s0: renamed from eth0
[   14.017133] virtio_net virtio4 enp7s0: failover primary slave:eth0 registered
[   14.325639] ixgbevf 0000:01:00.0 enp1s0: renamed from eth0
[   20.730930] IPv6: ADDRCONF(NETDEV_UP): enp7s0: link is not ready
[   20.752737] IPv6: ADDRCONF(NETDEV_UP): enp1s0: link is not ready
[   20.775436] IPv6: ADDRCONF(NETDEV_UP): enp7s0: link is not ready
[   20.777163] IPv6: ADDRCONF(NETDEV_CHANGE): enp1s0: link becomes ready
[   20.778269] IPv6: ADDRCONF(NETDEV_CHANGE): enp7s0: link becomes ready
[  399.961486] virtio_net virtio4 enp7s0: failover primary slave:enp1s0 unregistered

Actual results:
In step 4, the hostdev interface did not exists after migration with post-copy

Expected results:
The hostdev interface should exists on the vm after migration

Additional info: