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e9039c0451
A forthcoming commit updates qemu_io() to raise an exception on non-zero return by default, and changes its return type. In preparation, simplify some calls to qemu_io() that assert that specific error message strings do not appear in qemu-io's output. Asserting that all of these calls return a status code of zero will be a more robust way to guard against failure. Signed-off-by: John Snow <jsnow@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Hanna Reitz <hreitz@redhat.com> Message-Id: <20220418211504.943969-4-jsnow@redhat.com> Signed-off-by: Hanna Reitz <hreitz@redhat.com>
349 lines
14 KiB
Python
Executable File
349 lines
14 KiB
Python
Executable File
#!/usr/bin/env python3
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# group: rw backing
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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,
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'-o', 'backing_file=%s' % backing_img, '-F', 'raw', 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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qemu_io('-c', 'read -P0x41 0 512', target_img)
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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.dest_img2 = img_create('dest2')
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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.dest_img2)
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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="Job ID 'drive0' already in use",
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device='drive0', format=iotests.imgfmt,
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sync='full', target=self.dest_img2,
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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_img2,
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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 pause, but it can't do it immediately, as it can't
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# cancel other parallel requests (which didn't fail)
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with iotests.Timeout(60, "Timeout waiting for backup actually paused"):
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while True:
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res = self.vm.qmp('query-block-jobs')
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if res['return'][0]['status'] == 'paused':
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break
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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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supported_protocols=['file'])
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