Archipelago » qemu

#!/usr/bin/env python

#

# Tests for drive-backup

#

# Copyright (C) 2013 Red Hat, Inc.

#

# Based on 041.

#

# 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 time

import os

import iotests

from iotests import qemu_img, qemu_io, create_image

backing_img = os.path.join(iotests.test_dir, 'backing.img')

test_img = os.path.join(iotests.test_dir, 'test.img')

target_img = os.path.join(iotests.test_dir, 'target.img')

class TestSyncModesNoneAndTop(iotests.QMPTestCase):

    image_len = 64 * 1024 * 1024 # MB

    def setUp(self):

        create_image(backing_img, TestSyncModesNoneAndTop.image_len)

        qemu_img('create', '-f', iotests.imgfmt, '-o', 'backing_file=%s' % backing_img, test_img)

        qemu_io('-c', 'write -P0x41 0 512', test_img)

        qemu_io('-c', 'write -P0xd5 1M 32k', test_img)

        qemu_io('-c', 'write -P0xdc 32M 124k', test_img)

        qemu_io('-c', 'write -P0xdc 67043328 64k', test_img)

        self.vm = iotests.VM().add_drive(test_img)

        self.vm.launch()

    def tearDown(self):

        self.vm.shutdown()

        os.remove(test_img)

        os.remove(backing_img)

        try:

            os.remove(target_img)

        except OSError:

            pass

    def test_complete_top(self):

        self.assert_no_active_block_jobs()

        result = self.vm.qmp('drive-backup', device='drive0', sync='top',

                             format=iotests.imgfmt, target=target_img)

        self.assert_qmp(result, 'return', {})

        # Custom completed check as we are not copying all data.

        completed = False

        while not completed:

            for event in self.vm.get_qmp_events(wait=True):

                if event['event'] == 'BLOCK_JOB_COMPLETED':

                    self.assert_qmp(event, 'data/device', 'drive0')

                    self.assert_qmp_absent(event, 'data/error')

                    completed = True

        self.assert_no_active_block_jobs()

        self.vm.shutdown()

        self.assertTrue(iotests.compare_images(test_img, target_img),

                        'target image does not match source after backup')

    def test_cancel_sync_none(self):

        self.assert_no_active_block_jobs()

        result = self.vm.qmp('drive-backup', device='drive0',

                             sync='none', target=target_img)

        self.assert_qmp(result, 'return', {})

        time.sleep(1)

        self.vm.hmp_qemu_io('drive0', 'write -P0x5e 0 512')

        self.vm.hmp_qemu_io('drive0', 'aio_flush')

        # Verify that the original contents exist in the target image.

        event = self.cancel_and_wait()

        self.assert_qmp(event, 'data/type', 'backup')

        self.vm.shutdown()

        time.sleep(1)

        self.assertEqual(-1, qemu_io('-c', 'read -P0x41 0 512', target_img).find("verification failed"))

if __name__ == '__main__':

    iotests.main(supported_fmts=['qcow2', 'qed'])