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The idea is to let the top level bs have a big request alignment with blkdebug, so that the aio_write request issued from monitor will be serialised. This tests that QEMU doesn't crash upon the read request from the backup job's write notifier, which is a very special case of "reentrant" request. Signed-off-by: Fam Zheng <famz@redhat.com> Message-id: 1448962590-2842-4-git-send-email-famz@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
113 lines
4.1 KiB
Python
Executable File
113 lines
4.1 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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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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if __name__ == '__main__':
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iotests.main(supported_fmts=['qcow2', 'qed'])
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