This tests that concurrent requests are correctly drained before making graph modifications instead of running into assertions in bdrv_replace_node(). Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com>
84 lines
2.8 KiB
Python
Executable file
84 lines
2.8 KiB
Python
Executable file
#!/usr/bin/env python
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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.verify_image_format(supported_fmts=['qcow2'])
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def blockdev_create(vm, options):
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result = vm.qmp_log('blockdev-create',
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filters=[iotests.filter_qmp_testfiles],
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job_id='job0', options=options)
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if 'return' in result:
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assert result['return'] == {}
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vm.run_job('job0')
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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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