147 lines
5.5 KiB
Python
Executable File
147 lines
5.5 KiB
Python
Executable File
#!/usr/bin/env python3
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# group: rw quick
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#
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# Test what happens when errors occur to a mirror job after it has
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# been cancelled in the READY phase
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#
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# Copyright (C) 2021 Red Hat, Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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import os
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import iotests
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image_size = 1 * 1024 * 1024
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source = os.path.join(iotests.test_dir, 'source.img')
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target = os.path.join(iotests.test_dir, 'target.img')
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class TestMirrorReadyCancelError(iotests.QMPTestCase):
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def setUp(self) -> None:
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iotests.qemu_img_create('-f', iotests.imgfmt, source, str(image_size))
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iotests.qemu_img_create('-f', iotests.imgfmt, target, str(image_size))
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# Ensure that mirror will copy something before READY so the
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# target format layer will forward the pre-READY flush to its
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# file child
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assert iotests.qemu_io_silent('-c', 'write -P 1 0 64k', source) == 0
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self.vm = iotests.VM()
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self.vm.launch()
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def tearDown(self) -> None:
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self.vm.shutdown()
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os.remove(source)
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os.remove(target)
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def add_blockdevs(self, once: bool) -> None:
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res = self.vm.qmp('blockdev-add',
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**{'node-name': 'source',
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'driver': iotests.imgfmt,
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'file': {
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'driver': 'file',
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'filename': source
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}})
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self.assert_qmp(res, 'return', {})
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# blkdebug notes:
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# Enter state 2 on the first flush, which happens before the
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# job enters the READY state. The second flush will happen
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# when the job is about to complete, and we want that one to
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# fail.
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res = self.vm.qmp('blockdev-add',
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**{'node-name': 'target',
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'driver': iotests.imgfmt,
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'file': {
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'driver': 'blkdebug',
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'image': {
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'driver': 'file',
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'filename': target
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},
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'set-state': [{
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'event': 'flush_to_disk',
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'state': 1,
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'new_state': 2
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}],
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'inject-error': [{
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'event': 'flush_to_disk',
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'once': once,
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'immediately': True,
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'state': 2
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}]}})
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self.assert_qmp(res, 'return', {})
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def start_mirror(self) -> None:
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res = self.vm.qmp('blockdev-mirror',
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job_id='mirror',
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device='source',
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target='target',
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filter_node_name='mirror-top',
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sync='full',
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on_target_error='stop')
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self.assert_qmp(res, 'return', {})
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def cancel_mirror_with_error(self) -> None:
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self.vm.event_wait('BLOCK_JOB_READY')
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# Write something so will not leave the job immediately, but
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# flush first (which will fail, thanks to blkdebug)
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res = self.vm.qmp('human-monitor-command',
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command_line='qemu-io mirror-top "write -P 2 0 64k"')
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self.assert_qmp(res, 'return', '')
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# Drain status change events
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while self.vm.event_wait('JOB_STATUS_CHANGE', timeout=0.0) is not None:
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pass
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res = self.vm.qmp('block-job-cancel', device='mirror')
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self.assert_qmp(res, 'return', {})
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self.vm.event_wait('BLOCK_JOB_ERROR')
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def test_transient_error(self) -> None:
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self.add_blockdevs(True)
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self.start_mirror()
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self.cancel_mirror_with_error()
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while True:
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e = self.vm.event_wait('JOB_STATUS_CHANGE')
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if e['data']['status'] == 'standby':
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# Transient error, try again
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self.vm.qmp('block-job-resume', device='mirror')
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elif e['data']['status'] == 'null':
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break
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def test_persistent_error(self) -> None:
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self.add_blockdevs(False)
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self.start_mirror()
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self.cancel_mirror_with_error()
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while True:
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e = self.vm.event_wait('JOB_STATUS_CHANGE')
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if e['data']['status'] == 'standby':
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# Persistent error, no point in continuing
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self.vm.qmp('block-job-cancel', device='mirror', force=True)
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elif e['data']['status'] == 'null':
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break
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if __name__ == '__main__':
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# LUKS would require special key-secret handling in add_blockdevs()
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iotests.main(supported_fmts=['generic'],
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unsupported_fmts=['luks'],
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supported_protocols=['file'])
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