| # Common utilities and Python wrappers for qemu-iotests |
| # |
| # Copyright (C) 2012 IBM Corp. |
| # |
| # 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 errno |
| import os |
| import re |
| import subprocess |
| import string |
| import unittest |
| import sys |
| import struct |
| import json |
| import signal |
| import logging |
| import atexit |
| |
| sys.path.append(os.path.join(os.path.dirname(__file__), '..', '..', 'scripts')) |
| import qtest |
| |
| |
| # This will not work if arguments contain spaces but is necessary if we |
| # want to support the override options that ./check supports. |
| qemu_img_args = [os.environ.get('QEMU_IMG_PROG', 'qemu-img')] |
| if os.environ.get('QEMU_IMG_OPTIONS'): |
| qemu_img_args += os.environ['QEMU_IMG_OPTIONS'].strip().split(' ') |
| |
| qemu_io_args = [os.environ.get('QEMU_IO_PROG', 'qemu-io')] |
| if os.environ.get('QEMU_IO_OPTIONS'): |
| qemu_io_args += os.environ['QEMU_IO_OPTIONS'].strip().split(' ') |
| |
| qemu_nbd_args = [os.environ.get('QEMU_NBD_PROG', 'qemu-nbd')] |
| if os.environ.get('QEMU_NBD_OPTIONS'): |
| qemu_nbd_args += os.environ['QEMU_NBD_OPTIONS'].strip().split(' ') |
| |
| qemu_prog = os.environ.get('QEMU_PROG', 'qemu') |
| qemu_opts = os.environ.get('QEMU_OPTIONS', '').strip().split(' ') |
| |
| imgfmt = os.environ.get('IMGFMT', 'raw') |
| imgproto = os.environ.get('IMGPROTO', 'file') |
| test_dir = os.environ.get('TEST_DIR') |
| output_dir = os.environ.get('OUTPUT_DIR', '.') |
| cachemode = os.environ.get('CACHEMODE') |
| qemu_default_machine = os.environ.get('QEMU_DEFAULT_MACHINE') |
| |
| socket_scm_helper = os.environ.get('SOCKET_SCM_HELPER', 'socket_scm_helper') |
| debug = False |
| |
| luks_default_secret_object = 'secret,id=keysec0,data=' + \ |
| os.environ['IMGKEYSECRET'] |
| luks_default_key_secret_opt = 'key-secret=keysec0' |
| |
| |
| def qemu_img(*args): |
| '''Run qemu-img and return the exit code''' |
| devnull = open('/dev/null', 'r+') |
| exitcode = subprocess.call(qemu_img_args + list(args), stdin=devnull, stdout=devnull) |
| if exitcode < 0: |
| sys.stderr.write('qemu-img received signal %i: %s\n' % (-exitcode, ' '.join(qemu_img_args + list(args)))) |
| return exitcode |
| |
| def qemu_img_create(*args): |
| args = list(args) |
| |
| # default luks support |
| if '-f' in args and args[args.index('-f') + 1] == 'luks': |
| if '-o' in args: |
| i = args.index('-o') |
| if 'key-secret' not in args[i + 1]: |
| args[i + 1].append(luks_default_key_secret_opt) |
| args.insert(i + 2, '--object') |
| args.insert(i + 3, luks_default_secret_object) |
| else: |
| args = ['-o', luks_default_key_secret_opt, |
| '--object', luks_default_secret_object] + args |
| |
| args.insert(0, 'create') |
| |
| return qemu_img(*args) |
| |
| def qemu_img_verbose(*args): |
| '''Run qemu-img without suppressing its output and return the exit code''' |
| exitcode = subprocess.call(qemu_img_args + list(args)) |
| if exitcode < 0: |
| sys.stderr.write('qemu-img received signal %i: %s\n' % (-exitcode, ' '.join(qemu_img_args + list(args)))) |
| return exitcode |
| |
| def qemu_img_pipe(*args): |
| '''Run qemu-img and return its output''' |
| subp = subprocess.Popen(qemu_img_args + list(args), |
| stdout=subprocess.PIPE, |
| stderr=subprocess.STDOUT) |
| exitcode = subp.wait() |
| if exitcode < 0: |
| sys.stderr.write('qemu-img received signal %i: %s\n' % (-exitcode, ' '.join(qemu_img_args + list(args)))) |
| return subp.communicate()[0] |
| |
| def qemu_io(*args): |
| '''Run qemu-io and return the stdout data''' |
| args = qemu_io_args + list(args) |
| subp = subprocess.Popen(args, stdout=subprocess.PIPE, |
| stderr=subprocess.STDOUT) |
| exitcode = subp.wait() |
| if exitcode < 0: |
| sys.stderr.write('qemu-io received signal %i: %s\n' % (-exitcode, ' '.join(args))) |
| return subp.communicate()[0] |
| |
| |
| class QemuIoInteractive: |
| def __init__(self, *args): |
| self.args = qemu_io_args + list(args) |
| self._p = subprocess.Popen(self.args, stdin=subprocess.PIPE, |
| stdout=subprocess.PIPE, |
| stderr=subprocess.STDOUT) |
| assert self._p.stdout.read(9) == 'qemu-io> ' |
| |
| def close(self): |
| self._p.communicate('q\n') |
| |
| def _read_output(self): |
| pattern = 'qemu-io> ' |
| n = len(pattern) |
| pos = 0 |
| s = [] |
| while pos != n: |
| c = self._p.stdout.read(1) |
| # check unexpected EOF |
| assert c != '' |
| s.append(c) |
| if c == pattern[pos]: |
| pos += 1 |
| else: |
| pos = 0 |
| |
| return ''.join(s[:-n]) |
| |
| def cmd(self, cmd): |
| # quit command is in close(), '\n' is added automatically |
| assert '\n' not in cmd |
| cmd = cmd.strip() |
| assert cmd != 'q' and cmd != 'quit' |
| self._p.stdin.write(cmd + '\n') |
| return self._read_output() |
| |
| |
| def qemu_nbd(*args): |
| '''Run qemu-nbd in daemon mode and return the parent's exit code''' |
| return subprocess.call(qemu_nbd_args + ['--fork'] + list(args)) |
| |
| def compare_images(img1, img2, fmt1=imgfmt, fmt2=imgfmt): |
| '''Return True if two image files are identical''' |
| return qemu_img('compare', '-f', fmt1, |
| '-F', fmt2, img1, img2) == 0 |
| |
| def create_image(name, size): |
| '''Create a fully-allocated raw image with sector markers''' |
| file = open(name, 'w') |
| i = 0 |
| while i < size: |
| sector = struct.pack('>l504xl', i / 512, i / 512) |
| file.write(sector) |
| i = i + 512 |
| file.close() |
| |
| def image_size(img): |
| '''Return image's virtual size''' |
| r = qemu_img_pipe('info', '--output=json', '-f', imgfmt, img) |
| return json.loads(r)['virtual-size'] |
| |
| test_dir_re = re.compile(r"%s" % test_dir) |
| def filter_test_dir(msg): |
| return test_dir_re.sub("TEST_DIR", msg) |
| |
| win32_re = re.compile(r"\r") |
| def filter_win32(msg): |
| return win32_re.sub("", msg) |
| |
| qemu_io_re = re.compile(r"[0-9]* ops; [0-9\/:. sec]* \([0-9\/.inf]* [EPTGMKiBbytes]*\/sec and [0-9\/.inf]* ops\/sec\)") |
| def filter_qemu_io(msg): |
| msg = filter_win32(msg) |
| return qemu_io_re.sub("X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)", msg) |
| |
| chown_re = re.compile(r"chown [0-9]+:[0-9]+") |
| def filter_chown(msg): |
| return chown_re.sub("chown UID:GID", msg) |
| |
| def filter_qmp_event(event): |
| '''Filter a QMP event dict''' |
| event = dict(event) |
| if 'timestamp' in event: |
| event['timestamp']['seconds'] = 'SECS' |
| event['timestamp']['microseconds'] = 'USECS' |
| return event |
| |
| def log(msg, filters=[]): |
| for flt in filters: |
| msg = flt(msg) |
| print msg |
| |
| class Timeout: |
| def __init__(self, seconds, errmsg = "Timeout"): |
| self.seconds = seconds |
| self.errmsg = errmsg |
| def __enter__(self): |
| signal.signal(signal.SIGALRM, self.timeout) |
| signal.setitimer(signal.ITIMER_REAL, self.seconds) |
| return self |
| def __exit__(self, type, value, traceback): |
| signal.setitimer(signal.ITIMER_REAL, 0) |
| return False |
| def timeout(self, signum, frame): |
| raise Exception(self.errmsg) |
| |
| |
| class FilePath(object): |
| '''An auto-generated filename that cleans itself up. |
| |
| Use this context manager to generate filenames and ensure that the file |
| gets deleted:: |
| |
| with TestFilePath('test.img') as img_path: |
| qemu_img('create', img_path, '1G') |
| # migration_sock_path is automatically deleted |
| ''' |
| def __init__(self, name): |
| filename = '{0}-{1}'.format(os.getpid(), name) |
| self.path = os.path.join(test_dir, filename) |
| |
| def __enter__(self): |
| return self.path |
| |
| def __exit__(self, exc_type, exc_val, exc_tb): |
| try: |
| os.remove(self.path) |
| except OSError: |
| pass |
| return False |
| |
| |
| def file_path_remover(): |
| for path in reversed(file_path_remover.paths): |
| try: |
| os.remove(path) |
| except OSError: |
| pass |
| |
| |
| def file_path(*names): |
| ''' Another way to get auto-generated filename that cleans itself up. |
| |
| Use is as simple as: |
| |
| img_a, img_b = file_path('a.img', 'b.img') |
| sock = file_path('socket') |
| ''' |
| |
| if not hasattr(file_path_remover, 'paths'): |
| file_path_remover.paths = [] |
| atexit.register(file_path_remover) |
| |
| paths = [] |
| for name in names: |
| filename = '{0}-{1}'.format(os.getpid(), name) |
| path = os.path.join(test_dir, filename) |
| file_path_remover.paths.append(path) |
| paths.append(path) |
| |
| return paths[0] if len(paths) == 1 else paths |
| |
| |
| class VM(qtest.QEMUQtestMachine): |
| '''A QEMU VM''' |
| |
| def __init__(self, path_suffix=''): |
| name = "qemu%s-%d" % (path_suffix, os.getpid()) |
| super(VM, self).__init__(qemu_prog, qemu_opts, name=name, |
| test_dir=test_dir, |
| socket_scm_helper=socket_scm_helper) |
| self._num_drives = 0 |
| |
| def add_object(self, opts): |
| self._args.append('-object') |
| self._args.append(opts) |
| return self |
| |
| def add_device(self, opts): |
| self._args.append('-device') |
| self._args.append(opts) |
| return self |
| |
| def add_drive_raw(self, opts): |
| self._args.append('-drive') |
| self._args.append(opts) |
| return self |
| |
| def add_drive(self, path, opts='', interface='virtio', format=imgfmt): |
| '''Add a virtio-blk drive to the VM''' |
| options = ['if=%s' % interface, |
| 'id=drive%d' % self._num_drives] |
| |
| if path is not None: |
| options.append('file=%s' % path) |
| options.append('format=%s' % format) |
| options.append('cache=%s' % cachemode) |
| |
| if opts: |
| options.append(opts) |
| |
| if format == 'luks' and 'key-secret' not in opts: |
| # default luks support |
| if luks_default_secret_object not in self._args: |
| self.add_object(luks_default_secret_object) |
| |
| options.append(luks_default_key_secret_opt) |
| |
| self._args.append('-drive') |
| self._args.append(','.join(options)) |
| self._num_drives += 1 |
| return self |
| |
| def add_blockdev(self, opts): |
| self._args.append('-blockdev') |
| if isinstance(opts, str): |
| self._args.append(opts) |
| else: |
| self._args.append(','.join(opts)) |
| return self |
| |
| def add_incoming(self, addr): |
| self._args.append('-incoming') |
| self._args.append(addr) |
| return self |
| |
| def pause_drive(self, drive, event=None): |
| '''Pause drive r/w operations''' |
| if not event: |
| self.pause_drive(drive, "read_aio") |
| self.pause_drive(drive, "write_aio") |
| return |
| self.qmp('human-monitor-command', |
| command_line='qemu-io %s "break %s bp_%s"' % (drive, event, drive)) |
| |
| def resume_drive(self, drive): |
| self.qmp('human-monitor-command', |
| command_line='qemu-io %s "remove_break bp_%s"' % (drive, drive)) |
| |
| def hmp_qemu_io(self, drive, cmd): |
| '''Write to a given drive using an HMP command''' |
| return self.qmp('human-monitor-command', |
| command_line='qemu-io %s "%s"' % (drive, cmd)) |
| |
| |
| index_re = re.compile(r'([^\[]+)\[([^\]]+)\]') |
| |
| class QMPTestCase(unittest.TestCase): |
| '''Abstract base class for QMP test cases''' |
| |
| def dictpath(self, d, path): |
| '''Traverse a path in a nested dict''' |
| for component in path.split('/'): |
| m = index_re.match(component) |
| if m: |
| component, idx = m.groups() |
| idx = int(idx) |
| |
| if not isinstance(d, dict) or component not in d: |
| self.fail('failed path traversal for "%s" in "%s"' % (path, str(d))) |
| d = d[component] |
| |
| if m: |
| if not isinstance(d, list): |
| self.fail('path component "%s" in "%s" is not a list in "%s"' % (component, path, str(d))) |
| try: |
| d = d[idx] |
| except IndexError: |
| self.fail('invalid index "%s" in path "%s" in "%s"' % (idx, path, str(d))) |
| return d |
| |
| def flatten_qmp_object(self, obj, output=None, basestr=''): |
| if output is None: |
| output = dict() |
| if isinstance(obj, list): |
| for i in range(len(obj)): |
| self.flatten_qmp_object(obj[i], output, basestr + str(i) + '.') |
| elif isinstance(obj, dict): |
| for key in obj: |
| self.flatten_qmp_object(obj[key], output, basestr + key + '.') |
| else: |
| output[basestr[:-1]] = obj # Strip trailing '.' |
| return output |
| |
| def qmp_to_opts(self, obj): |
| obj = self.flatten_qmp_object(obj) |
| output_list = list() |
| for key in obj: |
| output_list += [key + '=' + obj[key]] |
| return ','.join(output_list) |
| |
| def assert_qmp_absent(self, d, path): |
| try: |
| result = self.dictpath(d, path) |
| except AssertionError: |
| return |
| self.fail('path "%s" has value "%s"' % (path, str(result))) |
| |
| def assert_qmp(self, d, path, value): |
| '''Assert that the value for a specific path in a QMP dict matches''' |
| result = self.dictpath(d, path) |
| self.assertEqual(result, value, 'values not equal "%s" and "%s"' % (str(result), str(value))) |
| |
| def assert_no_active_block_jobs(self): |
| result = self.vm.qmp('query-block-jobs') |
| self.assert_qmp(result, 'return', []) |
| |
| def assert_has_block_node(self, node_name=None, file_name=None): |
| """Issue a query-named-block-nodes and assert node_name and/or |
| file_name is present in the result""" |
| def check_equal_or_none(a, b): |
| return a == None or b == None or a == b |
| assert node_name or file_name |
| result = self.vm.qmp('query-named-block-nodes') |
| for x in result["return"]: |
| if check_equal_or_none(x.get("node-name"), node_name) and \ |
| check_equal_or_none(x.get("file"), file_name): |
| return |
| self.assertTrue(False, "Cannot find %s %s in result:\n%s" % \ |
| (node_name, file_name, result)) |
| |
| def assert_json_filename_equal(self, json_filename, reference): |
| '''Asserts that the given filename is a json: filename and that its |
| content is equal to the given reference object''' |
| self.assertEqual(json_filename[:5], 'json:') |
| self.assertEqual(self.flatten_qmp_object(json.loads(json_filename[5:])), |
| self.flatten_qmp_object(reference)) |
| |
| def cancel_and_wait(self, drive='drive0', force=False, resume=False): |
| '''Cancel a block job and wait for it to finish, returning the event''' |
| result = self.vm.qmp('block-job-cancel', device=drive, force=force) |
| self.assert_qmp(result, 'return', {}) |
| |
| if resume: |
| self.vm.resume_drive(drive) |
| |
| cancelled = False |
| result = None |
| while not cancelled: |
| for event in self.vm.get_qmp_events(wait=True): |
| if event['event'] == 'BLOCK_JOB_COMPLETED' or \ |
| event['event'] == 'BLOCK_JOB_CANCELLED': |
| self.assert_qmp(event, 'data/device', drive) |
| result = event |
| cancelled = True |
| |
| self.assert_no_active_block_jobs() |
| return result |
| |
| def wait_until_completed(self, drive='drive0', check_offset=True): |
| '''Wait for a block job to finish, returning the event''' |
| while True: |
| for event in self.vm.get_qmp_events(wait=True): |
| if event['event'] == 'BLOCK_JOB_COMPLETED': |
| self.assert_qmp(event, 'data/device', drive) |
| self.assert_qmp_absent(event, 'data/error') |
| if check_offset: |
| self.assert_qmp(event, 'data/offset', event['data']['len']) |
| self.assert_no_active_block_jobs() |
| return event |
| |
| def wait_ready(self, drive='drive0'): |
| '''Wait until a block job BLOCK_JOB_READY event''' |
| f = {'data': {'type': 'mirror', 'device': drive } } |
| event = self.vm.event_wait(name='BLOCK_JOB_READY', match=f) |
| |
| def wait_ready_and_cancel(self, drive='drive0'): |
| self.wait_ready(drive=drive) |
| event = self.cancel_and_wait(drive=drive) |
| self.assertEquals(event['event'], 'BLOCK_JOB_COMPLETED') |
| self.assert_qmp(event, 'data/type', 'mirror') |
| self.assert_qmp(event, 'data/offset', event['data']['len']) |
| |
| def complete_and_wait(self, drive='drive0', wait_ready=True): |
| '''Complete a block job and wait for it to finish''' |
| if wait_ready: |
| self.wait_ready(drive=drive) |
| |
| result = self.vm.qmp('block-job-complete', device=drive) |
| self.assert_qmp(result, 'return', {}) |
| |
| event = self.wait_until_completed(drive=drive) |
| self.assert_qmp(event, 'data/type', 'mirror') |
| |
| def pause_wait(self, job_id='job0'): |
| with Timeout(1, "Timeout waiting for job to pause"): |
| while True: |
| result = self.vm.qmp('query-block-jobs') |
| for job in result['return']: |
| if job['device'] == job_id and job['paused'] == True and job['busy'] == False: |
| return job |
| |
| def pause_job(self, job_id='job0', wait=True): |
| result = self.vm.qmp('block-job-pause', device=job_id) |
| self.assert_qmp(result, 'return', {}) |
| if wait: |
| return self.pause_wait(job_id) |
| return result |
| |
| |
| def notrun(reason): |
| '''Skip this test suite''' |
| # Each test in qemu-iotests has a number ("seq") |
| seq = os.path.basename(sys.argv[0]) |
| |
| open('%s/%s.notrun' % (output_dir, seq), 'wb').write(reason + '\n') |
| print '%s not run: %s' % (seq, reason) |
| sys.exit(0) |
| |
| def verify_image_format(supported_fmts=[], unsupported_fmts=[]): |
| assert not (supported_fmts and unsupported_fmts) |
| |
| if 'generic' in supported_fmts and \ |
| os.environ.get('IMGFMT_GENERIC', 'true') == 'true': |
| # similar to |
| # _supported_fmt generic |
| # for bash tests |
| return |
| |
| not_sup = supported_fmts and (imgfmt not in supported_fmts) |
| if not_sup or (imgfmt in unsupported_fmts): |
| notrun('not suitable for this image format: %s' % imgfmt) |
| |
| def verify_platform(supported_oses=['linux']): |
| if True not in [sys.platform.startswith(x) for x in supported_oses]: |
| notrun('not suitable for this OS: %s' % sys.platform) |
| |
| def verify_cache_mode(supported_cache_modes=[]): |
| if supported_cache_modes and (cachemode not in supported_cache_modes): |
| notrun('not suitable for this cache mode: %s' % cachemode) |
| |
| def supports_quorum(): |
| return 'quorum' in qemu_img_pipe('--help') |
| |
| def verify_quorum(): |
| '''Skip test suite if quorum support is not available''' |
| if not supports_quorum(): |
| notrun('quorum support missing') |
| |
| def main(supported_fmts=[], supported_oses=['linux'], supported_cache_modes=[], |
| unsupported_fmts=[]): |
| '''Run tests''' |
| |
| global debug |
| |
| # We are using TEST_DIR and QEMU_DEFAULT_MACHINE as proxies to |
| # indicate that we're not being run via "check". There may be |
| # other things set up by "check" that individual test cases rely |
| # on. |
| if test_dir is None or qemu_default_machine is None: |
| sys.stderr.write('Please run this test via the "check" script\n') |
| sys.exit(os.EX_USAGE) |
| |
| debug = '-d' in sys.argv |
| verbosity = 1 |
| verify_image_format(supported_fmts, unsupported_fmts) |
| verify_platform(supported_oses) |
| verify_cache_mode(supported_cache_modes) |
| |
| # We need to filter out the time taken from the output so that qemu-iotest |
| # can reliably diff the results against master output. |
| import StringIO |
| if debug: |
| output = sys.stdout |
| verbosity = 2 |
| sys.argv.remove('-d') |
| else: |
| output = StringIO.StringIO() |
| |
| logging.basicConfig(level=(logging.DEBUG if debug else logging.WARN)) |
| |
| class MyTestRunner(unittest.TextTestRunner): |
| def __init__(self, stream=output, descriptions=True, verbosity=verbosity): |
| unittest.TextTestRunner.__init__(self, stream, descriptions, verbosity) |
| |
| # unittest.main() will use sys.exit() so expect a SystemExit exception |
| try: |
| unittest.main(testRunner=MyTestRunner) |
| finally: |
| if not debug: |
| sys.stderr.write(re.sub(r'Ran (\d+) tests? in [\d.]+s', r'Ran \1 tests', output.getvalue())) |
