1# Functional test that hotplugs a virtio blk disk and checks it on a Linux 2# guest 3# 4# Copyright (c) 2021 Red Hat, Inc. 5# Copyright (c) Yandex 6# 7# This work is licensed under the terms of the GNU GPL, version 2 or 8# later. See the COPYING file in the top-level directory. 9 10import time 11 12from avocado_qemu.linuxtest import LinuxTest 13 14 15class HotPlug(LinuxTest): 16 def blockdev_add(self) -> None: 17 self.vm.cmd('blockdev-add', **{ 18 'driver': 'null-co', 19 'size': 1073741824, 20 'node-name': 'disk' 21 }) 22 23 def assert_vda(self) -> None: 24 self.ssh_command('test -e /sys/block/vda') 25 26 def assert_no_vda(self) -> None: 27 with self.assertRaises(AssertionError): 28 self.assert_vda() 29 30 def plug(self) -> None: 31 args = { 32 'driver': 'virtio-blk-pci', 33 'drive': 'disk', 34 'id': 'virtio-disk0', 35 'bus': 'pci.1', 36 'addr': 1 37 } 38 39 self.assert_no_vda() 40 self.vm.cmd('device_add', args) 41 try: 42 self.assert_vda() 43 except AssertionError: 44 time.sleep(1) 45 self.assert_vda() 46 47 def unplug(self) -> None: 48 self.vm.cmd('device_del', id='virtio-disk0') 49 50 self.vm.event_wait('DEVICE_DELETED', 1.0, 51 match={'data': {'device': 'virtio-disk0'}}) 52 53 self.assert_no_vda() 54 55 def test(self) -> None: 56 """ 57 :avocado: tags=arch:x86_64 58 :avocado: tags=machine:q35 59 :avocado: tags=accel:kvm 60 """ 61 self.require_accelerator('kvm') 62 self.vm.add_args('-accel', 'kvm') 63 self.vm.add_args('-device', 'pcie-pci-bridge,id=pci.1,bus=pcie.0') 64 65 self.launch_and_wait() 66 self.blockdev_add() 67 68 self.plug() 69 self.unplug() 70