6dd64919ea
QMP 'transaction' blockdev-snapshot-sync with multiple disks in an IOThread is an untested code path. Several bugs have been found in connection with this command. This patch adds a test case to prevent future regressions. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-id: 20171206144550.22295-10-stefanha@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
96 lines
3.7 KiB
Python
Executable File
96 lines
3.7 KiB
Python
Executable File
#!/usr/bin/env python
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#
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# Copyright (C) 2017 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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# Creator/Owner: Stefan Hajnoczi <stefanha@redhat.com>
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#
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# Check that QMP 'transaction' blockdev-snapshot-sync with multiple drives on a
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# single IOThread completes successfully. This particular command triggered a
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# hang due to recursive AioContext locking and BDRV_POLL_WHILE(). Protect
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# against regressions.
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import iotests
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iotests.verify_image_format(supported_fmts=['qcow2'])
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iotests.verify_platform(['linux'])
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with iotests.FilePath('disk0.img') as disk0_img_path, \
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iotests.FilePath('disk1.img') as disk1_img_path, \
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iotests.FilePath('disk0-snap.img') as disk0_snap_img_path, \
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iotests.FilePath('disk1-snap.img') as disk1_snap_img_path, \
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iotests.VM() as vm:
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img_size = '10M'
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iotests.qemu_img_pipe('create', '-f', iotests.imgfmt, disk0_img_path, img_size)
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iotests.qemu_img_pipe('create', '-f', iotests.imgfmt, disk1_img_path, img_size)
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iotests.log('Launching VM...')
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vm.launch()
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iotests.log('Adding IOThread...')
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iotests.log(vm.qmp('object-add',
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qom_type='iothread',
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id='iothread0'))
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iotests.log('Adding blockdevs...')
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iotests.log(vm.qmp('blockdev-add',
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driver=iotests.imgfmt,
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node_name='disk0',
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file={
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'driver': 'file',
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'filename': disk0_img_path,
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}))
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iotests.log(vm.qmp('blockdev-add',
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driver=iotests.imgfmt,
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node_name='disk1',
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file={
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'driver': 'file',
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'filename': disk1_img_path,
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}))
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iotests.log('Setting iothread...')
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iotests.log(vm.qmp('x-blockdev-set-iothread',
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node_name='disk0',
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iothread='iothread0'))
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iotests.log(vm.qmp('x-blockdev-set-iothread',
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node_name='disk1',
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iothread='iothread0'))
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iotests.log('Creating external snapshots...')
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iotests.log(vm.qmp(
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'transaction',
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actions=[
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{
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'data': {
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'node-name': 'disk0',
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'snapshot-file': disk0_snap_img_path,
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'snapshot-node-name': 'disk0-snap',
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'mode': 'absolute-paths',
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'format': iotests.imgfmt,
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},
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'type': 'blockdev-snapshot-sync'
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}, {
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'data': {
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'node-name': 'disk1',
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'snapshot-file': disk1_snap_img_path,
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'snapshot-node-name': 'disk1-snap',
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'mode': 'absolute-paths',
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'format': iotests.imgfmt
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},
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'type': 'blockdev-snapshot-sync'
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}
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]))
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