b9420e4f4b
If we spy on the QMP commands instead, we don't need callers to remember to pass it. Seems like a fair trade-off. The one slightly weird bit is overloading this instance variable for wait(), where we use it to mean "don't issue the qmp 'quit' command". This means that wait() will "fail" if the QEMU process does not terminate of its own accord. In most cases, we probably did already actually issue quit -- some iotests do this -- but in some others, we may be waiting for QEMU to terminate for some other reason, such as a test wherein we tell the guest (directly) to shut down. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Hanna Reitz <hreitz@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Message-id: 20211026175612.4127598-2-jsnow@redhat.com Signed-off-by: John Snow <jsnow@redhat.com>
127 lines
4.2 KiB
Python
Executable file
127 lines
4.2 KiB
Python
Executable file
#!/usr/bin/env python3
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# group: rw quick
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#
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# Test commit job graph modifications while requests are active
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#
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# Copyright (C) 2019 Red Hat, Inc.
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#
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# Creator/Owner: Kevin Wolf <kwolf@redhat.com>
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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 iotests
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from iotests import imgfmt
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iotests.script_initialize(supported_fmts=['qcow2'])
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iotests.log('Finishing a commit job with background reads')
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iotests.log('============================================')
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iotests.log('')
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with iotests.FilePath('t.qcow2') as disk_path, \
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iotests.FilePath('t.qcow2.mid') as mid_path, \
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iotests.FilePath('t.qcow2.base') as base_path, \
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iotests.VM() as vm:
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iotests.log("=== Create backing chain and start VM ===")
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iotests.log("")
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size = 128 * 1024 * 1024
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size_str = str(size)
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iotests.create_image(base_path, size)
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iotests.qemu_img_log('create', '-f', iotests.imgfmt, mid_path, size_str)
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iotests.qemu_img_log('create', '-f', iotests.imgfmt, disk_path, size_str)
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# Create a backing chain like this:
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# base <- [throttled: bps-read=4096] <- mid <- overlay
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vm.add_object('throttle-group,x-bps-read=4096,id=throttle0')
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vm.add_blockdev('file,filename=%s,node-name=base' % (base_path))
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vm.add_blockdev('throttle,throttle-group=throttle0,file=base,node-name=throttled')
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vm.add_blockdev('file,filename=%s,node-name=mid-file' % (mid_path))
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vm.add_blockdev('qcow2,file=mid-file,node-name=mid,backing=throttled')
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vm.add_drive_raw('if=none,id=overlay,driver=qcow2,file=%s,backing=mid' % (disk_path))
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vm.launch()
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iotests.log("=== Start background read requests ===")
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iotests.log("")
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def start_requests():
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vm.hmp_qemu_io('overlay', 'aio_read 0 4k')
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vm.hmp_qemu_io('overlay', 'aio_read 0 4k')
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start_requests()
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iotests.log("=== Run a commit job ===")
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iotests.log("")
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result = vm.qmp_log('block-commit', job_id='job0', auto_finalize=False,
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device='overlay', top_node='mid')
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vm.run_job('job0', auto_finalize=False, pre_finalize=start_requests,
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auto_dismiss=True)
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vm.shutdown()
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iotests.log('')
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iotests.log('Closing the VM while a job is being cancelled')
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iotests.log('=============================================')
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iotests.log('')
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with iotests.FilePath('src.qcow2') as src_path, \
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iotests.FilePath('dst.qcow2') as dst_path, \
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iotests.VM() as vm:
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iotests.log('=== Create images and start VM ===')
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iotests.log('')
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size = 128 * 1024 * 1024
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size_str = str(size)
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iotests.qemu_img_log('create', '-f', iotests.imgfmt, src_path, size_str)
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iotests.qemu_img_log('create', '-f', iotests.imgfmt, dst_path, size_str)
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iotests.log(iotests.qemu_io('-f', iotests.imgfmt, '-c', 'write 0 1M',
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src_path),
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filters=[iotests.filter_test_dir, iotests.filter_qemu_io])
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vm.add_object('throttle-group,x-bps-read=4096,id=throttle0')
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vm.add_blockdev('file,node-name=src-file,filename=%s' % (src_path))
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vm.add_blockdev('%s,node-name=src,file=src-file' % (iotests.imgfmt))
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vm.add_blockdev('file,node-name=dst-file,filename=%s' % (dst_path))
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vm.add_blockdev('%s,node-name=dst,file=dst-file' % (iotests.imgfmt))
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vm.add_blockdev('throttle,node-name=src-throttled,' +
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'throttle-group=throttle0,file=src')
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vm.add_device('virtio-blk,drive=src-throttled')
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vm.launch()
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iotests.log('=== Start a mirror job ===')
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iotests.log('')
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vm.qmp_log('blockdev-mirror', job_id='job0', device='src-throttled',
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target='dst', sync='full')
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vm.qmp_log('block-job-cancel', device='job0')
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vm.qmp_log('quit')
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vm.shutdown()
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