On 19/02/2026 12.55, Vladimir Sementsov-Ogievskiy wrote:
Add test for a new local-migration migration of virtio-net/tap, with fd
passing through UNIX socket.
Signed-off-by: Vladimir Sementsov-Ogievskiy <[email protected]>
---
tests/functional/x86_64/meson.build | 1 +
tests/functional/x86_64/test_tap_migration.py | 401 ++++++++++++++++++
2 files changed, 402 insertions(+)
create mode 100755 tests/functional/x86_64/test_tap_migration.py
diff --git a/tests/functional/x86_64/meson.build
b/tests/functional/x86_64/meson.build
index f78eec5e6c..d23b0cc727 100644
--- a/tests/functional/x86_64/meson.build
+++ b/tests/functional/x86_64/meson.build
@@ -36,4 +36,5 @@ tests_x86_64_system_thorough = [
'vfio_user_client',
'virtio_balloon',
'virtio_gpu',
+ 'tap_migration',
]
diff --git a/tests/functional/x86_64/test_tap_migration.py
b/tests/functional/x86_64/test_tap_migration.py
new file mode 100755
index 0000000000..c629b44f66
--- /dev/null
+++ b/tests/functional/x86_64/test_tap_migration.py
@@ -0,0 +1,401 @@
+#!/usr/bin/env python3
+#
+# Functional test that tests TAP local migration
+# with fd passing
+#
+# Copyright (c) Yandex Technologies LLC, 2026
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+import os
+import time
+import subprocess
+from subprocess import run
+import signal
+from typing import Tuple
+
+from qemu_test import (
+ LinuxKernelTest,
+ Asset,
+ exec_command_and_wait_for_pattern,
+)
+from qemu_test.decorators import skipWithoutSudo
+
+GUEST_IP = "10.0.1.2"
+GUEST_IP_MASK = f"{GUEST_IP}/24"
+GUEST_MAC = "d6:0d:75:f8:0f:b7"
+HOST_IP = "10.0.1.1"
Is it ok to use hard-coded IP addresses here? What if there is already
another unrelated 10.0.1.x network on the host (e.g. from a libvirt setup or
a VPN)?
+HOST_IP_MASK = f"{HOST_IP}/24"
+TAP_ID = "tap0"
+TAP_ID2 = "tap1"
+TAP_MAC = "e6:1d:44:b5:03:5d"
+
+
+def ip(args, check=True) -> None:
+ """Run ip command with sudo"""
+ run(["sudo", "ip"] + args, check=check)
I think you need to check for the "ip" binary somewhere and skip the test if
it is not available (e.g. on a unusual Linux distro or a *BSD host).
Thomas
