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#!/usr/bin/env python3
#
# This test covers what happens when a mirror block job is cancelled
# in various phases of its existence.
#
# Note that this test only checks the emitted events (i.e.
# BLOCK_JOB_COMPLETED vs. BLOCK_JOB_CANCELLED), it does not compare
# whether the target is in sync with the source when the
# BLOCK_JOB_COMPLETED event occurs. This is covered by other tests
# (such as 041).
#
# Copyright (C) 2018 Red Hat, Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# Creator/Owner: Max Reitz <mreitz@redhat.com>
import iotests
from iotests import log, qemu_img, qemu_io_silent
iotests.verify_image_format(supported_fmts=['qcow2', 'raw'])
# Launches the VM, adds two null-co nodes (source and target), and
# starts a blockdev-mirror job on them.
#
# Either both or none of speed and buf_size must be given.
def start_mirror(vm, speed=None, buf_size=None):
vm.launch()
ret = vm.qmp('blockdev-add',
node_name='source',
driver='null-co',
size=1048576)
assert ret['return'] == {}
ret = vm.qmp('blockdev-add',
node_name='target',
driver='null-co',
size=1048576)
assert ret['return'] == {}
if speed is not None:
ret = vm.qmp('blockdev-mirror',
job_id='mirror',
device='source',
target='target',
sync='full',
speed=speed,
buf_size=buf_size)
else:
ret = vm.qmp('blockdev-mirror',
job_id='mirror',
device='source',
target='target',
sync='full')
assert ret['return'] == {}
log('')
log('=== Cancel mirror job before convergence ===')
log('')
log('--- force=false ---')
log('')
with iotests.VM() as vm:
# Low speed so it does not converge
start_mirror(vm, 65536, 65536)
log('Cancelling job')
log(vm.qmp('block-job-cancel', device='mirror', force=False))
log(vm.event_wait('BLOCK_JOB_CANCELLED'),
filters=[iotests.filter_qmp_event])
log('')
log('--- force=true ---')
log('')
with iotests.VM() as vm:
# Low speed so it does not converge
start_mirror(vm, 65536, 65536)
log('Cancelling job')
log(vm.qmp('block-job-cancel', device='mirror', force=True))
log(vm.event_wait('BLOCK_JOB_CANCELLED'),
filters=[iotests.filter_qmp_event])
log('')
log('=== Cancel mirror job after convergence ===')
log('')
log('--- force=false ---')
log('')
with iotests.VM() as vm:
start_mirror(vm)
log(vm.event_wait('BLOCK_JOB_READY'),
filters=[iotests.filter_qmp_event])
log('Cancelling job')
log(vm.qmp('block-job-cancel', device='mirror', force=False))
log(vm.event_wait('BLOCK_JOB_COMPLETED'),
filters=[iotests.filter_qmp_event])
log('')
log('--- force=true ---')
log('')
with iotests.VM() as vm:
start_mirror(vm)
log(vm.event_wait('BLOCK_JOB_READY'),
filters=[iotests.filter_qmp_event])
log('Cancelling job')
log(vm.qmp('block-job-cancel', device='mirror', force=True))
log(vm.event_wait('BLOCK_JOB_CANCELLED'),
filters=[iotests.filter_qmp_event])
log('')
log('=== Cancel mirror job from throttled node by quitting ===')
log('')
with iotests.VM() as vm, \
iotests.FilePath('src.img') as src_img_path:
assert qemu_img('create', '-f', iotests.imgfmt, src_img_path, '64M') == 0
assert qemu_io_silent('-f', iotests.imgfmt, src_img_path,
'-c', 'write -P 42 0M 64M') == 0
vm.launch()
ret = vm.qmp('object-add', qom_type='throttle-group', id='tg',
props={'x-bps-read': 4096})
assert ret['return'] == {}
ret = vm.qmp('blockdev-add',
node_name='source',
driver=iotests.imgfmt,
file={
'driver': 'file',
'filename': src_img_path
})
assert ret['return'] == {}
ret = vm.qmp('blockdev-add',
node_name='throttled-source',
driver='throttle',
throttle_group='tg',
file='source')
assert ret['return'] == {}
ret = vm.qmp('blockdev-add',
node_name='target',
driver='null-co',
size=(64 * 1048576))
assert ret['return'] == {}
ret = vm.qmp('blockdev-mirror',
job_id='mirror',
device='throttled-source',
target='target',
sync='full')
assert ret['return'] == {}
log(vm.qmp('quit'))
with iotests.Timeout(5, 'Timeout waiting for VM to quit'):
vm.shutdown(has_quit=True)
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