windows: Wait for Xenvif offboard after uninstall

Xenvif offboard will reset the NIC, which will cause any running SSH
commands to fail.

Signed-off-by: Tu Dinh <[email protected]>

Author: dinhngtu

tests/guest_tools/win/__init__.py

@@ -147,6 +147,19 @@ def vif_set_dns(vif: VIF, nameservers: List[str]):
     )
 
 
+def wait_for_vm_xenvif_offboard(vm: VM):
+    # Xenvif offboard will reset the NIC, so need to wait for it to disappear first
+    wait_for(
+        lambda: strtobool(
+            vm.execute_powershell_script(
+                r'$null -eq (Get-ScheduledTask "Copy-XenVifSettings" -ErrorAction SilentlyContinue)', simple_output=True
+            )
+        ),
+        timeout_secs=300,
+        retry_delay_secs=30,
+    )
+
+
 def set_vm_dns(vm: VM):
     logging.info("Set VM DNS")
     vif = vm.vifs()[0]

tests/guest_tools/win/guest_tools.py

@@ -10,6 +10,7 @@
     enable_testsign,
     insert_cd_safe,
     wait_for_vm_running_and_ssh_up_without_tools,
+    wait_for_vm_xenvif_offboard,
 )
 
 from typing import Any, Dict
@@ -79,3 +80,4 @@ def uninstall_guest_tools(vm: VM, action: PowerAction):
     if action == PowerAction.Reboot:
         vm.start()
         wait_for_vm_running_and_ssh_up_without_tools(vm)
+        wait_for_vm_xenvif_offboard(vm)

tests/guest_tools/win/test_xenclean.py

@@ -12,6 +12,7 @@
     insert_cd_safe,
     set_vm_dns,
     wait_for_vm_running_and_ssh_up_without_tools,
+    wait_for_vm_xenvif_offboard,
 )
 
 from typing import Any, Dict, Tuple
@@ -33,6 +34,7 @@ def run_xenclean(vm: VM, guest_tools_iso: Dict[str, Any]):
 
     vm.start()
     wait_for_vm_running_and_ssh_up_without_tools(vm)
+    wait_for_vm_xenvif_offboard(vm)
 
 
 @pytest.mark.multi_vms