103cbc771e
Most of our Python unittest-style tests only support the file protocol. You can run them with any other protocol, but the test will simply ignore your choice and use file anyway. We should let them signal that they require the file protocol so they are skipped when you want to test some other protocol. Signed-off-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
263 lines
9.4 KiB
Python
Executable File
263 lines
9.4 KiB
Python
Executable File
#!/usr/bin/env python
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#
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# Test whether the backing BDSs are correct after completion of a
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# mirror block job; in "existing" modes (drive-mirror with
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# mode=existing and blockdev-mirror) the backing chain should not be
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# overridden.
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#
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# Copyright (C) 2016 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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from iotests import qemu_img
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back0_img = os.path.join(iotests.test_dir, 'back0.' + iotests.imgfmt)
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back1_img = os.path.join(iotests.test_dir, 'back1.' + iotests.imgfmt)
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back2_img = os.path.join(iotests.test_dir, 'back2.' + iotests.imgfmt)
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source_img = os.path.join(iotests.test_dir, 'source.' + iotests.imgfmt)
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target_img = os.path.join(iotests.test_dir, 'target.' + iotests.imgfmt)
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# Class variables for controlling its behavior:
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#
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# existing: If True, explicitly create the target image and blockdev-add it
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# target_backing: If existing is True: Use this filename as the backing file
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# of the target image
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# (None: no backing file)
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# target_blockdev_backing: If existing is True: Pass this dict as "backing"
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# for the blockdev-add command
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# (None: do not pass "backing")
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# target_real_backing: If existing is True: The real filename of the backing
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# image during runtime, only makes sense if
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# target_blockdev_backing is not None
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# (None: same as target_backing)
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class BaseClass(iotests.QMPTestCase):
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target_blockdev_backing = None
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target_real_backing = None
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def setUp(self):
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qemu_img('create', '-f', iotests.imgfmt, back0_img, '1440K')
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qemu_img('create', '-f', iotests.imgfmt, '-b', back0_img, back1_img)
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qemu_img('create', '-f', iotests.imgfmt, '-b', back1_img, back2_img)
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qemu_img('create', '-f', iotests.imgfmt, '-b', back2_img, source_img)
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self.vm = iotests.VM()
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# Add the BDS via blockdev-add so it stays around after the mirror block
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# job has been completed
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blockdev = {'node-name': 'source',
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'driver': iotests.imgfmt,
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'file': {'driver': 'file',
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'filename': source_img}}
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self.vm.add_blockdev(self.vm.qmp_to_opts(blockdev))
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self.vm.add_device('virtio-blk,id=qdev0,drive=source')
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self.vm.launch()
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self.assertIntactSourceBackingChain()
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if self.existing:
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if self.target_backing:
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qemu_img('create', '-f', iotests.imgfmt,
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'-b', self.target_backing, target_img, '1440K')
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else:
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qemu_img('create', '-f', iotests.imgfmt, target_img, '1440K')
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if self.cmd == 'blockdev-mirror':
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options = { 'node-name': 'target',
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'driver': iotests.imgfmt,
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'file': { 'driver': 'file',
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'filename': target_img } }
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if self.target_blockdev_backing:
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options['backing'] = self.target_blockdev_backing
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result = self.vm.qmp('blockdev-add', **options)
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self.assert_qmp(result, 'return', {})
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def tearDown(self):
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self.vm.shutdown()
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os.remove(source_img)
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os.remove(back2_img)
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os.remove(back1_img)
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os.remove(back0_img)
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try:
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os.remove(target_img)
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except OSError:
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pass
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def findBlockNode(self, node_name, qdev=None):
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if qdev:
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result = self.vm.qmp('query-block')
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for device in result['return']:
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if device['qdev'] == qdev:
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if node_name:
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self.assert_qmp(device, 'inserted/node-name', node_name)
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return device['inserted']
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else:
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result = self.vm.qmp('query-named-block-nodes')
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for node in result['return']:
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if node['node-name'] == node_name:
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return node
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self.fail('Cannot find node %s/%s' % (qdev, node_name))
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def assertIntactSourceBackingChain(self):
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node = self.findBlockNode('source')
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self.assert_qmp(node, 'image' + '/backing-image' * 0 + '/filename',
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source_img)
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self.assert_qmp(node, 'image' + '/backing-image' * 1 + '/filename',
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back2_img)
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self.assert_qmp(node, 'image' + '/backing-image' * 2 + '/filename',
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back1_img)
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self.assert_qmp(node, 'image' + '/backing-image' * 3 + '/filename',
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back0_img)
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self.assert_qmp_absent(node, 'image' + '/backing-image' * 4)
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def assertCorrectBackingImage(self, node, default_image):
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if self.existing:
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if self.target_real_backing:
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image = self.target_real_backing
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else:
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image = self.target_backing
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else:
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image = default_image
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if image:
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self.assert_qmp(node, 'image/backing-image/filename', image)
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else:
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self.assert_qmp_absent(node, 'image/backing-image')
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# Class variables for controlling its behavior:
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#
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# cmd: Mirroring command to execute, either drive-mirror or blockdev-mirror
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class MirrorBaseClass(BaseClass):
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def runMirror(self, sync):
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if self.cmd == 'blockdev-mirror':
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result = self.vm.qmp(self.cmd, job_id='mirror-job', device='source',
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sync=sync, target='target')
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else:
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if self.existing:
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mode = 'existing'
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else:
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mode = 'absolute-paths'
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result = self.vm.qmp(self.cmd, job_id='mirror-job', device='source',
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sync=sync, target=target_img,
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format=iotests.imgfmt, mode=mode,
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node_name='target')
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self.assert_qmp(result, 'return', {})
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self.vm.event_wait('BLOCK_JOB_READY')
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result = self.vm.qmp('block-job-complete', device='mirror-job')
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self.assert_qmp(result, 'return', {})
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self.vm.event_wait('BLOCK_JOB_COMPLETED')
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def testFull(self):
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self.runMirror('full')
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node = self.findBlockNode('target',
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'/machine/peripheral/qdev0/virtio-backend')
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self.assertCorrectBackingImage(node, None)
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self.assertIntactSourceBackingChain()
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def testTop(self):
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self.runMirror('top')
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node = self.findBlockNode('target',
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'/machine/peripheral/qdev0/virtio-backend')
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self.assertCorrectBackingImage(node, back2_img)
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self.assertIntactSourceBackingChain()
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def testNone(self):
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self.runMirror('none')
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node = self.findBlockNode('target',
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'/machine/peripheral/qdev0/virtio-backend')
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self.assertCorrectBackingImage(node, source_img)
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self.assertIntactSourceBackingChain()
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class TestDriveMirrorAbsolutePaths(MirrorBaseClass):
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cmd = 'drive-mirror'
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existing = False
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class TestDriveMirrorExistingNoBacking(MirrorBaseClass):
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cmd = 'drive-mirror'
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existing = True
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target_backing = None
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class TestDriveMirrorExistingBacking(MirrorBaseClass):
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cmd = 'drive-mirror'
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existing = True
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target_backing = 'null-co://'
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class TestBlockdevMirrorNoBacking(MirrorBaseClass):
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cmd = 'blockdev-mirror'
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existing = True
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target_backing = None
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class TestBlockdevMirrorBacking(MirrorBaseClass):
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cmd = 'blockdev-mirror'
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existing = True
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target_backing = 'null-co://'
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class TestBlockdevMirrorForcedBacking(MirrorBaseClass):
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cmd = 'blockdev-mirror'
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existing = True
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target_backing = None
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target_blockdev_backing = { 'driver': 'null-co' }
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target_real_backing = 'null-co://'
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class TestCommit(BaseClass):
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existing = False
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def testCommit(self):
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result = self.vm.qmp('block-commit', job_id='commit-job',
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device='source', base=back1_img)
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self.assert_qmp(result, 'return', {})
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self.vm.event_wait('BLOCK_JOB_READY')
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result = self.vm.qmp('block-job-complete', device='commit-job')
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self.assert_qmp(result, 'return', {})
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self.vm.event_wait('BLOCK_JOB_COMPLETED')
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node = self.findBlockNode(None,
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'/machine/peripheral/qdev0/virtio-backend')
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self.assert_qmp(node, 'image' + '/backing-image' * 0 + '/filename',
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back1_img)
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self.assert_qmp(node, 'image' + '/backing-image' * 1 + '/filename',
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back0_img)
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self.assert_qmp_absent(node, 'image' + '/backing-image' * 2 +
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'/filename')
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self.assertIntactSourceBackingChain()
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BaseClass = None
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MirrorBaseClass = None
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if __name__ == '__main__':
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iotests.main(supported_fmts=['qcow2'],
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supported_protocols=['file'])
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