1#!/usr/bin/env python3 2# group: rw quick migration 3# 4# Test clearing unknown autoclear_features flag by qcow2 after 5# migration. This test mimics migration to older qemu. 6# 7# Copyright (c) 2017 Parallels International GmbH 8# 9# This program is free software; you can redistribute it and/or modify 10# it under the terms of the GNU General Public License as published by 11# the Free Software Foundation; either version 2 of the License, or 12# (at your option) any later version. 13# 14# This program is distributed in the hope that it will be useful, 15# but WITHOUT ANY WARRANTY; without even the implied warranty of 16# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17# GNU General Public License for more details. 18# 19# You should have received a copy of the GNU General Public License 20# along with this program. If not, see <http://www.gnu.org/licenses/>. 21# 22 23import os 24import iotests 25from iotests import qemu_img 26 27disk = os.path.join(iotests.test_dir, 'disk') 28migfile = os.path.join(iotests.test_dir, 'migfile') 29 30class TestInvalidateAutoclear(iotests.QMPTestCase): 31 32 def tearDown(self): 33 self.vm_a.shutdown() 34 self.vm_b.shutdown() 35 os.remove(disk) 36 os.remove(migfile) 37 38 def setUp(self): 39 qemu_img('create', '-f', iotests.imgfmt, disk, '1M') 40 41 self.vm_a = iotests.VM(path_suffix='a').add_drive(disk) 42 self.vm_a.launch() 43 44 self.vm_b = iotests.VM(path_suffix='b').add_drive(disk) 45 self.vm_b.add_incoming("exec: cat '" + migfile + "'") 46 47 def test_migration(self): 48 result = self.vm_a.qmp('migrate', uri='exec:cat>' + migfile) 49 self.assert_qmp(result, 'return', {}); 50 self.assertNotEqual(self.vm_a.event_wait("STOP"), None) 51 52 with open(disk, 'r+b') as f: 53 f.seek(88) # first byte of autoclear_features field 54 f.write(b'\xff') 55 56 self.vm_b.launch() 57 while True: 58 result = self.vm_b.qmp('query-status') 59 if result['return']['status'] == 'running': 60 break 61 62 with open(disk, 'rb') as f: 63 f.seek(88) 64 self.assertEqual(f.read(1), b'\x00') 65 66if __name__ == '__main__': 67 iotests.main(supported_fmts=['qcow2'], 68 supported_protocols=['file']) 69