| # 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 |
| sys.path.append(os.path.join(os.path.dirname(__file__), '..', '..', 'scripts')) |
| import qtest |
| import struct |
| import json |
| |
| |
| # 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_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') |
| |
| 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_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] |
| |
| def compare_images(img1, img2): |
| '''Return True if two image files are identical''' |
| return qemu_img('compare', '-f', imgfmt, |
| '-F', imgfmt, 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 log(msg, filters=[]): |
| for flt in filters: |
| msg = flt(msg) |
| print msg |
| |
| class VM(qtest.QEMUQtestMachine): |
| '''A QEMU VM''' |
| |
| def __init__(self): |
| super(VM, self).__init__(qemu_prog, qemu_opts, test_dir=test_dir, |
| socket_scm_helper=socket_scm_helper) |
| self._num_drives = 0 |
| |
| def add_drive_raw(self, opts): |
| self._args.append('-drive') |
| self._args.append(opts) |
| return self |
| |
| def add_drive(self, path, opts='', interface='virtio'): |
| '''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' % imgfmt) |
| options.append('cache=%s' % cachemode) |
| |
| if opts: |
| options.append(opts) |
| |
| self._args.append('-drive') |
| self._args.append(','.join(options)) |
| self._num_drives += 1 |
| 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 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 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''' |
| 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', drive) |
| self.assert_qmp_absent(event, 'data/error') |
| if check_offset: |
| self.assert_qmp(event, 'data/offset', event['data']['len']) |
| completed = True |
| |
| 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 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=[]): |
| if supported_fmts and (imgfmt not in supported_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_quorum(): |
| '''Skip test suite if quorum support is not available''' |
| if 'quorum' not in qemu_img_pipe('--help'): |
| notrun('quorum support missing') |
| |
| def main(supported_fmts=[], supported_oses=['linux']): |
| '''Run tests''' |
| |
| # 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) |
| verify_platform(supported_oses) |
| |
| # 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() |
| |
| 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())) |
