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#!/usr/bin/env python3
#
# 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.
from qemu_test import LinuxKernelTest, Asset, exec_command_and_wait_for_pattern
class HotPlugBlk(LinuxKernelTest):
ASSET_KERNEL = Asset(
('https://archives.fedoraproject.org/pub/archive/fedora/linux/releases'
'/31/Server/x86_64/os/images/pxeboot/vmlinuz'),
'd4738d03dbbe083ca610d0821d0a8f1488bebbdccef54ce33e3adb35fda00129')
ASSET_INITRD = Asset(
('https://archives.fedoraproject.org/pub/archive/fedora/linux/releases'
'/31/Server/x86_64/os/images/pxeboot/initrd.img'),
'277cd6c7adf77c7e63d73bbb2cded8ef9e2d3a2f100000e92ff1f8396513cd8b')
def blockdev_add(self) -> None:
self.vm.cmd('blockdev-add', **{
'driver': 'null-co',
'size': 1073741824,
'node-name': 'disk'
})
def assert_vda(self) -> None:
exec_command_and_wait_for_pattern(self, 'while ! test -e /sys/block/vda ;'
' do sleep 0.2 ; done', '# ')
def assert_no_vda(self) -> None:
exec_command_and_wait_for_pattern(self, 'while test -e /sys/block/vda ;'
' do sleep 0.2 ; done', '# ')
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)
self.wait_for_console_pattern('virtio_blk virtio0: [vda]')
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:
self.require_accelerator('kvm')
self.set_machine('q35')
self.vm.add_args('-accel', 'kvm')
self.vm.add_args('-device', 'pcie-pci-bridge,id=pci.1,bus=pcie.0')
self.vm.add_args('-m', '1G')
self.vm.add_args('-append', 'console=ttyS0 rd.rescue')
self.launch_kernel(self.ASSET_KERNEL.fetch(),
self.ASSET_INITRD.fetch(),
wait_for='Entering emergency mode.')
self.wait_for_console_pattern('# ')
self.blockdev_add()
self.plug()
self.unplug()
if __name__ == '__main__':
LinuxKernelTest.main()
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