blob: 01217459b98096fc6f95997f6823a8b263f21725 [file] [log] [blame]
#!/usr/bin/env python3
# group: rw quick
#
# Test what happens when errors occur to a mirror job after it has
# been cancelled in the READY phase
#
# Copyright (C) 2021 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/>.
#
import os
import iotests
image_size = 1 * 1024 * 1024
source = os.path.join(iotests.test_dir, 'source.img')
target = os.path.join(iotests.test_dir, 'target.img')
class TestMirrorReadyCancelError(iotests.QMPTestCase):
def setUp(self) -> None:
iotests.qemu_img_create('-f', iotests.imgfmt, source, str(image_size))
iotests.qemu_img_create('-f', iotests.imgfmt, target, str(image_size))
# Ensure that mirror will copy something before READY so the
# target format layer will forward the pre-READY flush to its
# file child
iotests.qemu_io('-c', 'write -P 1 0 64k', source)
self.vm = iotests.VM()
self.vm.launch()
def tearDown(self) -> None:
self.vm.shutdown()
os.remove(source)
os.remove(target)
def add_blockdevs(self, once: bool) -> None:
res = self.vm.qmp('blockdev-add',
**{'node-name': 'source',
'driver': iotests.imgfmt,
'file': {
'driver': 'file',
'filename': source
}})
self.assert_qmp(res, 'return', {})
# blkdebug notes:
# Enter state 2 on the first flush, which happens before the
# job enters the READY state. The second flush will happen
# when the job is about to complete, and we want that one to
# fail.
res = self.vm.qmp('blockdev-add',
**{'node-name': 'target',
'driver': iotests.imgfmt,
'file': {
'driver': 'blkdebug',
'image': {
'driver': 'file',
'filename': target
},
'set-state': [{
'event': 'flush_to_disk',
'state': 1,
'new_state': 2
}],
'inject-error': [{
'event': 'flush_to_disk',
'once': once,
'immediately': True,
'state': 2
}]}})
self.assert_qmp(res, 'return', {})
def start_mirror(self) -> None:
res = self.vm.qmp('blockdev-mirror',
job_id='mirror',
device='source',
target='target',
filter_node_name='mirror-top',
sync='full',
on_target_error='stop')
self.assert_qmp(res, 'return', {})
def cancel_mirror_with_error(self) -> None:
self.vm.event_wait('BLOCK_JOB_READY')
# Write something so will not leave the job immediately, but
# flush first (which will fail, thanks to blkdebug)
res = self.vm.qmp('human-monitor-command',
command_line='qemu-io mirror-top "write -P 2 0 64k"')
self.assert_qmp(res, 'return', '')
# Drain status change events
while self.vm.event_wait('JOB_STATUS_CHANGE', timeout=0.0) is not None:
pass
res = self.vm.qmp('block-job-cancel', device='mirror')
self.assert_qmp(res, 'return', {})
self.vm.event_wait('BLOCK_JOB_ERROR')
def test_transient_error(self) -> None:
self.add_blockdevs(True)
self.start_mirror()
self.cancel_mirror_with_error()
while True:
e = self.vm.event_wait('JOB_STATUS_CHANGE')
if e['data']['status'] == 'standby':
# Transient error, try again
self.vm.qmp('block-job-resume', device='mirror')
elif e['data']['status'] == 'null':
break
def test_persistent_error(self) -> None:
self.add_blockdevs(False)
self.start_mirror()
self.cancel_mirror_with_error()
while True:
e = self.vm.event_wait('JOB_STATUS_CHANGE')
if e['data']['status'] == 'standby':
# Persistent error, no point in continuing
self.vm.qmp('block-job-cancel', device='mirror', force=True)
elif e['data']['status'] == 'null':
break
if __name__ == '__main__':
# LUKS would require special key-secret handling in add_blockdevs()
iotests.main(supported_fmts=['generic'],
unsupported_fmts=['luks'],
supported_protocols=['file'])