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# Functional test that hotplugs a virtio blk disk and checks it on a Linux
# guest
#
# Copyright (c) 2021 Red Hat, Inc.
# Copyright (c) Yandex
#
# This work is licensed under the terms of the GNU GPL, version 2 or
# later. See the COPYING file in the top-level directory.
import time
from avocado_qemu.linuxtest import LinuxTest
class HotPlug(LinuxTest):
def blockdev_add(self) -> None:
self.vm.cmd('blockdev-add', **{
'driver': 'null-co',
'size': 1073741824,
'node-name': 'disk'
})
def assert_vda(self) -> None:
self.ssh_command('test -e /sys/block/vda')
def assert_no_vda(self) -> None:
with self.assertRaises(AssertionError):
self.assert_vda()
def plug(self) -> None:
args = {
'driver': 'virtio-blk-pci',
'drive': 'disk',
'id': 'virtio-disk0',
'bus': 'pci.1',
'addr': '1',
}
self.assert_no_vda()
self.vm.cmd('device_add', args)
try:
self.assert_vda()
except AssertionError:
time.sleep(1)
self.assert_vda()
def unplug(self) -> None:
self.vm.cmd('device_del', id='virtio-disk0')
self.vm.event_wait('DEVICE_DELETED', 1.0,
match={'data': {'device': 'virtio-disk0'}})
self.assert_no_vda()
def test(self) -> None:
"""
:avocado: tags=arch:x86_64
:avocado: tags=machine:q35
:avocado: tags=accel:kvm
"""
self.require_accelerator('kvm')
self.vm.add_args('-accel', 'kvm')
self.vm.add_args('-device', 'pcie-pci-bridge,id=pci.1,bus=pcie.0')
self.launch_and_wait()
self.blockdev_add()
self.plug()
self.unplug()
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