1#!/usr/bin/env python 2# 3# Test clearing unknown autoclear_features flag by qcow2 after 4# migration. This test mimics migration to older qemu. 5# 6# Copyright (c) 2017 Parallels International GmbH 7# 8# This program is free software; you can redistribute it and/or modify 9# it under the terms of the GNU General Public License as published by 10# the Free Software Foundation; either version 2 of the License, or 11# (at your option) any later version. 12# 13# This program is distributed in the hope that it will be useful, 14# but WITHOUT ANY WARRANTY; without even the implied warranty of 15# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16# GNU General Public License for more details. 17# 18# You should have received a copy of the GNU General Public License 19# along with this program. If not, see <http://www.gnu.org/licenses/>. 20# 21 22import os 23import iotests 24from iotests import qemu_img 25 26disk = os.path.join(iotests.test_dir, 'disk') 27migfile = os.path.join(iotests.test_dir, 'migfile') 28 29class TestInvalidateAutoclear(iotests.QMPTestCase): 30 31 def tearDown(self): 32 self.vm_a.shutdown() 33 self.vm_b.shutdown() 34 os.remove(disk) 35 os.remove(migfile) 36 37 def setUp(self): 38 qemu_img('create', '-f', iotests.imgfmt, disk, '1M') 39 40 self.vm_a = iotests.VM(path_suffix='a').add_drive(disk) 41 self.vm_a.launch() 42 43 self.vm_b = iotests.VM(path_suffix='b').add_drive(disk) 44 self.vm_b.add_incoming("exec: cat '" + migfile + "'") 45 46 def test_migration(self): 47 result = self.vm_a.qmp('migrate', uri='exec:cat>' + migfile) 48 self.assert_qmp(result, 'return', {}); 49 self.assertNotEqual(self.vm_a.event_wait("STOP"), None) 50 51 with open(disk, 'r+b') as f: 52 f.seek(88) # first byte of autoclear_features field 53 f.write(b'\xff') 54 55 self.vm_b.launch() 56 while True: 57 result = self.vm_b.qmp('query-status') 58 if result['return']['status'] == 'running': 59 break 60 61 with open(disk, 'rb') as f: 62 f.seek(88) 63 self.assertEqual(f.read(1), b'\x00') 64 65if __name__ == '__main__': 66 iotests.main(supported_fmts=['qcow2'], 67 supported_protocols=['file']) 68