| #!/usr/bin/env python3 |
| # group: rw |
| # |
| # Test whether the backing BDSs are correct after completion of a |
| # mirror block job; in "existing" modes (drive-mirror with |
| # mode=existing and blockdev-mirror) the backing chain should not be |
| # overridden. |
| # |
| # Copyright (C) 2016 Red Hat, Inc. |
| # |
| # This program is free software; you can redistribute it and/or modify |
| # it under the terms of the GNU General Public License as published by |
| # the Free Software Foundation; either version 2 of the License, or |
| # (at your option) any later version. |
| # |
| # This program is distributed in the hope that it will be useful, |
| # but WITHOUT ANY WARRANTY; without even the implied warranty of |
| # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| # GNU General Public License for more details. |
| # |
| # You should have received a copy of the GNU General Public License |
| # along with this program. If not, see <http://www.gnu.org/licenses/>. |
| # |
| |
| import os |
| import iotests |
| from iotests import qemu_img |
| |
| back0_img = os.path.join(iotests.test_dir, 'back0.' + iotests.imgfmt) |
| back1_img = os.path.join(iotests.test_dir, 'back1.' + iotests.imgfmt) |
| back2_img = os.path.join(iotests.test_dir, 'back2.' + iotests.imgfmt) |
| source_img = os.path.join(iotests.test_dir, 'source.' + iotests.imgfmt) |
| target_img = os.path.join(iotests.test_dir, 'target.' + iotests.imgfmt) |
| |
| |
| # Class variables for controlling its behavior: |
| # |
| # existing: If True, explicitly create the target image and blockdev-add it |
| # target_backing: If existing is True: Use this filename as the backing file |
| # of the target image |
| # (None: no backing file) |
| # target_blockdev_backing: If existing is True: Pass this dict as "backing" |
| # for the blockdev-add command |
| # (None: do not pass "backing") |
| # target_real_backing: If existing is True: The real filename of the backing |
| # image during runtime, only makes sense if |
| # target_blockdev_backing is not None |
| # (None: same as target_backing) |
| # target_open_with_backing: If True, the target image is added with its backing |
| # chain opened right away. If False, blockdev-add |
| # opens it without a backing file and job completion |
| # is supposed to open the backing chain. |
| # use_iothread: If True, an iothread is configured for the virtio-blk device |
| # that uses the image being mirrored |
| |
| class BaseClass(iotests.QMPTestCase): |
| target_blockdev_backing = None |
| target_real_backing = None |
| target_open_with_backing = True |
| use_iothread = False |
| |
| def setUp(self): |
| qemu_img('create', '-f', iotests.imgfmt, back0_img, '1440K') |
| qemu_img('create', '-f', iotests.imgfmt, '-b', back0_img, |
| '-F', iotests.imgfmt, back1_img) |
| qemu_img('create', '-f', iotests.imgfmt, '-b', back1_img, |
| '-F', iotests.imgfmt, back2_img) |
| qemu_img('create', '-f', iotests.imgfmt, '-b', back2_img, |
| '-F', iotests.imgfmt, source_img) |
| |
| self.vm = iotests.VM() |
| # Add the BDS via blockdev-add so it stays around after the mirror block |
| # job has been completed |
| blockdev = {'node-name': 'source', |
| 'driver': iotests.imgfmt, |
| 'file': {'driver': 'file', |
| 'filename': source_img}} |
| self.vm.add_blockdev(self.vm.qmp_to_opts(blockdev)) |
| |
| if self.use_iothread: |
| self.vm.add_object('iothread,id=iothread0') |
| iothread = ",iothread=iothread0" |
| else: |
| iothread = "" |
| |
| self.vm.add_device('virtio-scsi%s' % iothread) |
| self.vm.add_device('scsi-hd,id=qdev0,drive=source') |
| |
| self.vm.launch() |
| |
| self.assertIntactSourceBackingChain() |
| |
| if self.existing: |
| if self.target_backing: |
| qemu_img('create', '-f', iotests.imgfmt, |
| '-b', self.target_backing, '-F', 'raw', |
| target_img, '1440K') |
| else: |
| qemu_img('create', '-f', iotests.imgfmt, target_img, '1440K') |
| |
| if self.cmd == 'blockdev-mirror': |
| options = { 'node-name': 'target', |
| 'driver': iotests.imgfmt, |
| 'file': { 'driver': 'file', |
| 'node-name': 'target-file', |
| 'filename': target_img } } |
| |
| if not self.target_open_with_backing: |
| options['backing'] = None |
| elif self.target_blockdev_backing: |
| options['backing'] = self.target_blockdev_backing |
| |
| self.vm.cmd('blockdev-add', options) |
| |
| def tearDown(self): |
| self.vm.shutdown() |
| os.remove(source_img) |
| os.remove(back2_img) |
| os.remove(back1_img) |
| os.remove(back0_img) |
| try: |
| os.remove(target_img) |
| except OSError: |
| pass |
| |
| def findBlockNode(self, node_name, qdev=None): |
| if qdev: |
| result = self.vm.qmp('query-block') |
| for device in result['return']: |
| if device['qdev'] == qdev: |
| if node_name: |
| self.assert_qmp(device, 'inserted/node-name', node_name) |
| return device['inserted'] |
| else: |
| result = self.vm.qmp('query-named-block-nodes') |
| for node in result['return']: |
| if node['node-name'] == node_name: |
| return node |
| |
| self.fail('Cannot find node %s/%s' % (qdev, node_name)) |
| |
| def assertIntactSourceBackingChain(self): |
| node = self.findBlockNode('source') |
| |
| self.assert_qmp(node, 'image' + '/backing-image' * 0 + '/filename', |
| source_img) |
| self.assert_qmp(node, 'image' + '/backing-image' * 1 + '/filename', |
| back2_img) |
| self.assert_qmp(node, 'image' + '/backing-image' * 2 + '/filename', |
| back1_img) |
| self.assert_qmp(node, 'image' + '/backing-image' * 3 + '/filename', |
| back0_img) |
| self.assert_qmp_absent(node, 'image' + '/backing-image' * 4) |
| |
| def assertCorrectBackingImage(self, node, default_image): |
| if self.existing: |
| if self.target_real_backing: |
| image = self.target_real_backing |
| else: |
| image = self.target_backing |
| else: |
| image = default_image |
| |
| if image: |
| self.assert_qmp(node, 'image/backing-image/filename', image) |
| else: |
| self.assert_qmp_absent(node, 'image/backing-image') |
| |
| |
| # Class variables for controlling its behavior: |
| # |
| # cmd: Mirroring command to execute, either drive-mirror or blockdev-mirror |
| |
| class MirrorBaseClass(BaseClass): |
| def openBacking(self): |
| pass |
| |
| def runMirror(self, sync): |
| if self.cmd == 'blockdev-mirror': |
| self.vm.cmd(self.cmd, job_id='mirror-job', device='source', |
| sync=sync, target='target', |
| auto_finalize=False) |
| else: |
| if self.existing: |
| mode = 'existing' |
| else: |
| mode = 'absolute-paths' |
| self.vm.cmd(self.cmd, job_id='mirror-job', device='source', |
| sync=sync, target=target_img, |
| format=iotests.imgfmt, mode=mode, |
| node_name='target', auto_finalize=False) |
| |
| self.vm.run_job('mirror-job', auto_finalize=False, |
| pre_finalize=self.openBacking, auto_dismiss=True) |
| |
| def testFull(self): |
| self.runMirror('full') |
| |
| node = self.findBlockNode('target', 'qdev0') |
| self.assertCorrectBackingImage(node, None) |
| self.assertIntactSourceBackingChain() |
| |
| def testTop(self): |
| self.runMirror('top') |
| |
| node = self.findBlockNode('target', 'qdev0') |
| self.assertCorrectBackingImage(node, back2_img) |
| self.assertIntactSourceBackingChain() |
| |
| def testNone(self): |
| self.runMirror('none') |
| |
| node = self.findBlockNode('target', 'qdev0') |
| self.assertCorrectBackingImage(node, source_img) |
| self.assertIntactSourceBackingChain() |
| |
| |
| class TestDriveMirrorAbsolutePaths(MirrorBaseClass): |
| cmd = 'drive-mirror' |
| existing = False |
| |
| class TestDriveMirrorExistingNoBacking(MirrorBaseClass): |
| cmd = 'drive-mirror' |
| existing = True |
| target_backing = None |
| |
| class TestDriveMirrorExistingBacking(MirrorBaseClass): |
| cmd = 'drive-mirror' |
| existing = True |
| target_backing = 'null-co://' |
| |
| class TestBlockdevMirrorNoBacking(MirrorBaseClass): |
| cmd = 'blockdev-mirror' |
| existing = True |
| target_backing = None |
| |
| class TestBlockdevMirrorBacking(MirrorBaseClass): |
| cmd = 'blockdev-mirror' |
| existing = True |
| target_backing = 'null-co://' |
| |
| class TestBlockdevMirrorForcedBacking(MirrorBaseClass): |
| cmd = 'blockdev-mirror' |
| existing = True |
| target_backing = None |
| target_blockdev_backing = { 'driver': 'null-co' } |
| target_real_backing = 'null-co://' |
| |
| # Attach the backing chain only during completion, with blockdev-reopen |
| class TestBlockdevMirrorReopen(MirrorBaseClass): |
| cmd = 'blockdev-mirror' |
| existing = True |
| target_backing = 'null-co://' |
| target_open_with_backing = False |
| |
| def openBacking(self): |
| if not self.target_open_with_backing: |
| self.vm.cmd('blockdev-add', node_name="backing", |
| driver="null-co") |
| self.vm.cmd('blockdev-reopen', options=[{ |
| 'node-name': "target", |
| 'driver': iotests.imgfmt, |
| 'file': "target-file", |
| 'backing': "backing" |
| }]) |
| |
| class TestBlockdevMirrorReopenIothread(TestBlockdevMirrorReopen): |
| use_iothread = True |
| |
| # Attach the backing chain only during completion, with blockdev-snapshot |
| class TestBlockdevMirrorSnapshot(MirrorBaseClass): |
| cmd = 'blockdev-mirror' |
| existing = True |
| target_backing = 'null-co://' |
| target_open_with_backing = False |
| |
| def openBacking(self): |
| if not self.target_open_with_backing: |
| self.vm.cmd('blockdev-add', node_name="backing", |
| driver="null-co") |
| self.vm.cmd('blockdev-snapshot', node="backing", |
| overlay="target") |
| |
| class TestBlockdevMirrorSnapshotIothread(TestBlockdevMirrorSnapshot): |
| use_iothread = True |
| |
| class TestCommit(BaseClass): |
| existing = False |
| |
| def testCommit(self): |
| self.vm.cmd('block-commit', job_id='commit-job', |
| device='source', base=back1_img) |
| |
| self.vm.event_wait('BLOCK_JOB_READY') |
| |
| self.vm.cmd('block-job-complete', device='commit-job') |
| |
| self.vm.event_wait('BLOCK_JOB_COMPLETED') |
| |
| node = self.findBlockNode(None, 'qdev0') |
| self.assert_qmp(node, 'image' + '/backing-image' * 0 + '/filename', |
| back1_img) |
| self.assert_qmp(node, 'image' + '/backing-image' * 1 + '/filename', |
| back0_img) |
| self.assert_qmp_absent(node, 'image' + '/backing-image' * 2 + |
| '/filename') |
| |
| self.assertIntactSourceBackingChain() |
| |
| |
| BaseClass = None |
| MirrorBaseClass = None |
| |
| if __name__ == '__main__': |
| iotests.main(supported_fmts=['qcow2'], |
| supported_protocols=['file']) |
