5f594a2e99
Perform two guest writes to not yet backed up areas of an image, where
the former touches an inner area of the latter.
Before HEAD^, copy offloading broke this in two ways:
(1) The target image differs from the reference image (what the source
was when the backup started).
(2) But you will not see that in the failing output, because the job
offset is reported as being greater than the job length. This is
because one cluster is copied twice, and thus accounted for twice,
but of course the job length does not increase.
Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-id: 20190801173900.23851-3-mreitz@redhat.com
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Tested-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
339 lines
14 KiB
Python
Executable File
339 lines
14 KiB
Python
Executable File
#!/usr/bin/env python
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#
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# Tests for drive-backup
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#
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# Copyright (C) 2013 Red Hat, Inc.
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#
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# Based on 041.
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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 time
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import os
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import iotests
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from iotests import qemu_img, qemu_io, create_image
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backing_img = os.path.join(iotests.test_dir, 'backing.img')
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test_img = os.path.join(iotests.test_dir, 'test.img')
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target_img = os.path.join(iotests.test_dir, 'target.img')
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def img_create(img, fmt=iotests.imgfmt, size='64M', **kwargs):
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fullname = os.path.join(iotests.test_dir, '%s.%s' % (img, fmt))
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optargs = []
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for k,v in kwargs.items():
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optargs = optargs + ['-o', '%s=%s' % (k,v)]
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args = ['create', '-f', fmt] + optargs + [fullname, size]
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iotests.qemu_img(*args)
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return fullname
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def try_remove(img):
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try:
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os.remove(img)
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except OSError:
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pass
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def io_write_patterns(img, patterns):
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for pattern in patterns:
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iotests.qemu_io('-c', 'write -P%s %s %s' % pattern, img)
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class TestSyncModesNoneAndTop(iotests.QMPTestCase):
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image_len = 64 * 1024 * 1024 # MB
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def setUp(self):
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create_image(backing_img, TestSyncModesNoneAndTop.image_len)
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qemu_img('create', '-f', iotests.imgfmt, '-o', 'backing_file=%s' % backing_img, test_img)
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qemu_io('-c', 'write -P0x41 0 512', test_img)
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qemu_io('-c', 'write -P0xd5 1M 32k', test_img)
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qemu_io('-c', 'write -P0xdc 32M 124k', test_img)
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qemu_io('-c', 'write -P0xdc 67043328 64k', test_img)
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self.vm = iotests.VM().add_drive(test_img)
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self.vm.launch()
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def tearDown(self):
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self.vm.shutdown()
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os.remove(test_img)
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os.remove(backing_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 test_complete_top(self):
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self.assert_no_active_block_jobs()
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result = self.vm.qmp('drive-backup', device='drive0', sync='top',
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format=iotests.imgfmt, target=target_img)
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self.assert_qmp(result, 'return', {})
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self.wait_until_completed(check_offset=False)
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self.assert_no_active_block_jobs()
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self.vm.shutdown()
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self.assertTrue(iotests.compare_images(test_img, target_img),
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'target image does not match source after backup')
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def test_cancel_sync_none(self):
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self.assert_no_active_block_jobs()
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result = self.vm.qmp('drive-backup', device='drive0',
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sync='none', target=target_img)
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self.assert_qmp(result, 'return', {})
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time.sleep(1)
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self.vm.hmp_qemu_io('drive0', 'write -P0x5e 0 512')
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self.vm.hmp_qemu_io('drive0', 'aio_flush')
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# Verify that the original contents exist in the target image.
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event = self.cancel_and_wait()
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self.assert_qmp(event, 'data/type', 'backup')
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self.vm.shutdown()
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time.sleep(1)
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self.assertEqual(-1, qemu_io('-c', 'read -P0x41 0 512', target_img).find("verification failed"))
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class TestBeforeWriteNotifier(iotests.QMPTestCase):
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def setUp(self):
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self.vm = iotests.VM().add_drive_raw("file=blkdebug::null-co://,id=drive0,align=65536,driver=blkdebug")
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self.vm.launch()
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def tearDown(self):
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self.vm.shutdown()
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os.remove(target_img)
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def test_before_write_notifier(self):
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self.vm.pause_drive("drive0")
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result = self.vm.qmp('drive-backup', device='drive0',
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sync='full', target=target_img,
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format="file", speed=1)
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self.assert_qmp(result, 'return', {})
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result = self.vm.qmp('block-job-pause', device="drive0")
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self.assert_qmp(result, 'return', {})
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# Speed is low enough that this must be an uncopied range, which will
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# trigger the before write notifier
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self.vm.hmp_qemu_io('drive0', 'aio_write -P 1 512512 512')
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self.vm.resume_drive("drive0")
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result = self.vm.qmp('block-job-resume', device="drive0")
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self.assert_qmp(result, 'return', {})
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event = self.cancel_and_wait()
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self.assert_qmp(event, 'data/type', 'backup')
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class BackupTest(iotests.QMPTestCase):
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def setUp(self):
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self.vm = iotests.VM()
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self.test_img = img_create('test')
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self.dest_img = img_create('dest')
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self.ref_img = img_create('ref')
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self.vm.add_drive(self.test_img)
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self.vm.launch()
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def tearDown(self):
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self.vm.shutdown()
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try_remove(self.test_img)
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try_remove(self.dest_img)
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try_remove(self.ref_img)
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def hmp_io_writes(self, drive, patterns):
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for pattern in patterns:
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self.vm.hmp_qemu_io(drive, 'write -P%s %s %s' % pattern)
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self.vm.hmp_qemu_io(drive, 'flush')
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def qmp_backup_and_wait(self, cmd='drive-backup', serror=None,
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aerror=None, **kwargs):
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if not self.qmp_backup(cmd, serror, **kwargs):
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return False
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return self.qmp_backup_wait(kwargs['device'], aerror)
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def qmp_backup(self, cmd='drive-backup',
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error=None, **kwargs):
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self.assertTrue('device' in kwargs)
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res = self.vm.qmp(cmd, **kwargs)
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if error:
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self.assert_qmp(res, 'error/desc', error)
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return False
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self.assert_qmp(res, 'return', {})
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return True
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def qmp_backup_wait(self, device, error=None):
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event = self.vm.event_wait(name="BLOCK_JOB_COMPLETED",
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match={'data': {'device': device}})
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self.assertNotEqual(event, None)
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try:
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failure = self.dictpath(event, 'data/error')
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except AssertionError:
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# Backup succeeded.
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self.assert_qmp(event, 'data/offset', event['data']['len'])
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return True
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else:
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# Failure.
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self.assert_qmp(event, 'data/error', qerror)
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return False
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def test_overlapping_writes(self):
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# Write something to back up
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self.hmp_io_writes('drive0', [('42', '0M', '2M')])
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# Create a reference backup
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self.qmp_backup_and_wait(device='drive0', format=iotests.imgfmt,
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sync='full', target=self.ref_img,
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auto_dismiss=False)
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res = self.vm.qmp('block-job-dismiss', id='drive0')
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self.assert_qmp(res, 'return', {})
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# Now to the test backup: We simulate the following guest
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# writes:
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# (1) [1M + 64k, 1M + 128k): Afterwards, everything in that
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# area should be in the target image, and we must not copy
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# it again (because the source image has changed now)
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# (64k is the job's cluster size)
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# (2) [1M, 2M): The backup job must not get overeager. It
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# must copy [1M, 1M + 64k) and [1M + 128k, 2M) separately,
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# but not the area in between.
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self.qmp_backup(device='drive0', format=iotests.imgfmt, sync='full',
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target=self.dest_img, speed=1, auto_dismiss=False)
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self.hmp_io_writes('drive0', [('23', '%ik' % (1024 + 64), '64k'),
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('66', '1M', '1M')])
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# Let the job complete
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res = self.vm.qmp('block-job-set-speed', device='drive0', speed=0)
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self.assert_qmp(res, 'return', {})
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self.qmp_backup_wait('drive0')
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res = self.vm.qmp('block-job-dismiss', id='drive0')
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self.assert_qmp(res, 'return', {})
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self.assertTrue(iotests.compare_images(self.ref_img, self.dest_img),
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'target image does not match reference image')
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def test_dismiss_false(self):
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res = self.vm.qmp('query-block-jobs')
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self.assert_qmp(res, 'return', [])
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self.qmp_backup_and_wait(device='drive0', format=iotests.imgfmt,
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sync='full', target=self.dest_img,
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auto_dismiss=True)
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res = self.vm.qmp('query-block-jobs')
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self.assert_qmp(res, 'return', [])
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def test_dismiss_true(self):
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res = self.vm.qmp('query-block-jobs')
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self.assert_qmp(res, 'return', [])
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self.qmp_backup_and_wait(device='drive0', format=iotests.imgfmt,
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sync='full', target=self.dest_img,
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auto_dismiss=False)
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res = self.vm.qmp('query-block-jobs')
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self.assert_qmp(res, 'return[0]/status', 'concluded')
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res = self.vm.qmp('block-job-dismiss', id='drive0')
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self.assert_qmp(res, 'return', {})
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res = self.vm.qmp('query-block-jobs')
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self.assert_qmp(res, 'return', [])
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def test_dismiss_bad_id(self):
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res = self.vm.qmp('query-block-jobs')
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self.assert_qmp(res, 'return', [])
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res = self.vm.qmp('block-job-dismiss', id='foobar')
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self.assert_qmp(res, 'error/class', 'DeviceNotActive')
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def test_dismiss_collision(self):
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res = self.vm.qmp('query-block-jobs')
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self.assert_qmp(res, 'return', [])
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self.qmp_backup_and_wait(device='drive0', format=iotests.imgfmt,
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sync='full', target=self.dest_img,
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auto_dismiss=False)
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res = self.vm.qmp('query-block-jobs')
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self.assert_qmp(res, 'return[0]/status', 'concluded')
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# Leave zombie job un-dismissed, observe a failure:
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res = self.qmp_backup_and_wait(serror="Node 'drive0' is busy: block device is in use by block job: backup",
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device='drive0', format=iotests.imgfmt,
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sync='full', target=self.dest_img,
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auto_dismiss=False)
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self.assertEqual(res, False)
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# OK, dismiss the zombie.
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res = self.vm.qmp('block-job-dismiss', id='drive0')
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self.assert_qmp(res, 'return', {})
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res = self.vm.qmp('query-block-jobs')
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self.assert_qmp(res, 'return', [])
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# Ensure it's really gone.
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self.qmp_backup_and_wait(device='drive0', format=iotests.imgfmt,
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sync='full', target=self.dest_img,
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auto_dismiss=False)
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def dismissal_failure(self, dismissal_opt):
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res = self.vm.qmp('query-block-jobs')
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self.assert_qmp(res, 'return', [])
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# Give blkdebug something to chew on
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self.hmp_io_writes('drive0',
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(('0x9a', 0, 512),
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('0x55', '8M', '352k'),
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('0x78', '15872k', '1M')))
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# Add destination node via blkdebug
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res = self.vm.qmp('blockdev-add',
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node_name='target0',
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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': self.dest_img
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},
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'inject-error': [{
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'event': 'write_aio',
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'errno': 5,
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'immediately': False,
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'once': True
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}],
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})
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self.assert_qmp(res, 'return', {})
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res = self.qmp_backup(cmd='blockdev-backup',
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device='drive0', target='target0',
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on_target_error='stop',
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sync='full',
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auto_dismiss=dismissal_opt)
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self.assertTrue(res)
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event = self.vm.event_wait(name="BLOCK_JOB_ERROR",
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match={'data': {'device': 'drive0'}})
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self.assertNotEqual(event, None)
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# OK, job should be wedged
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res = self.vm.qmp('query-block-jobs')
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self.assert_qmp(res, 'return[0]/status', 'paused')
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res = self.vm.qmp('block-job-dismiss', id='drive0')
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self.assert_qmp(res, 'error/desc',
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"Job 'drive0' in state 'paused' cannot accept"
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" command verb 'dismiss'")
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res = self.vm.qmp('query-block-jobs')
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self.assert_qmp(res, 'return[0]/status', 'paused')
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# OK, unstick job and move forward.
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res = self.vm.qmp('block-job-resume', device='drive0')
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self.assert_qmp(res, 'return', {})
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# And now we need to wait for it to conclude;
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res = self.qmp_backup_wait(device='drive0')
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self.assertTrue(res)
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if not dismissal_opt:
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# Job should now be languishing:
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res = self.vm.qmp('query-block-jobs')
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self.assert_qmp(res, 'return[0]/status', 'concluded')
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res = self.vm.qmp('block-job-dismiss', id='drive0')
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self.assert_qmp(res, 'return', {})
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res = self.vm.qmp('query-block-jobs')
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self.assert_qmp(res, 'return', [])
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def test_dismiss_premature(self):
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self.dismissal_failure(False)
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def test_dismiss_erroneous(self):
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self.dismissal_failure(True)
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if __name__ == '__main__':
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iotests.main(supported_fmts=['qcow2', 'qed'])
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