| # 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 os |
| import re |
| import subprocess |
| import string |
| import unittest |
| import sys; sys.path.append(os.path.join(os.path.dirname(__file__), '..', '..', 'scripts', 'qmp')) |
| import qmp |
| import struct |
| |
| __all__ = ['imgfmt', 'imgproto', 'test_dir' 'qemu_img', 'qemu_io', |
| 'VM', 'QMPTestCase', 'notrun', 'main'] |
| |
| # This will not work if arguments or path contain spaces but is necessary if we |
| # want to support the override options that ./check supports. |
| qemu_img_args = os.environ.get('QEMU_IMG', 'qemu-img').strip().split(' ') |
| qemu_io_args = os.environ.get('QEMU_IO', 'qemu-io').strip().split(' ') |
| qemu_args = os.environ.get('QEMU', 'qemu').strip().split(' ') |
| |
| imgfmt = os.environ.get('IMGFMT', 'raw') |
| imgproto = os.environ.get('IMGPROTO', 'file') |
| test_dir = os.environ.get('TEST_DIR', '/var/tmp') |
| cachemode = os.environ.get('CACHEMODE') |
| |
| 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+') |
| return subprocess.call(qemu_img_args + list(args), stdin=devnull, stdout=devnull) |
| |
| def qemu_img_verbose(*args): |
| '''Run qemu-img without suppressing its output and return the exit code''' |
| return subprocess.call(qemu_img_args + list(args)) |
| |
| def qemu_img_pipe(*args): |
| '''Run qemu-img and return its output''' |
| return subprocess.Popen(qemu_img_args + list(args), stdout=subprocess.PIPE).communicate()[0] |
| |
| def qemu_io(*args): |
| '''Run qemu-io and return the stdout data''' |
| args = qemu_io_args + list(args) |
| return subprocess.Popen(args, stdout=subprocess.PIPE).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() |
| |
| class VM(object): |
| '''A QEMU VM''' |
| |
| def __init__(self): |
| self._monitor_path = os.path.join(test_dir, 'qemu-mon.%d' % os.getpid()) |
| self._qemu_log_path = os.path.join(test_dir, 'qemu-log.%d' % os.getpid()) |
| self._args = qemu_args + ['-chardev', |
| 'socket,id=mon,path=' + self._monitor_path, |
| '-mon', 'chardev=mon,mode=control', |
| '-qtest', 'stdio', '-machine', 'accel=qtest', |
| '-display', 'none', '-vga', 'none'] |
| self._num_drives = 0 |
| |
| # This can be used to add an unused monitor instance. |
| def add_monitor_telnet(self, ip, port): |
| args = 'tcp:%s:%d,server,nowait,telnet' % (ip, port) |
| self._args.append('-monitor') |
| self._args.append(args) |
| |
| def add_drive(self, path, opts=''): |
| '''Add a virtio-blk drive to the VM''' |
| options = ['if=virtio', |
| 'format=%s' % imgfmt, |
| 'cache=%s' % cachemode, |
| 'file=%s' % path, |
| 'id=drive%d' % self._num_drives] |
| 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)) |
| |
| def add_fd(self, fd, fdset, opaque, opts=''): |
| '''Pass a file descriptor to the VM''' |
| options = ['fd=%d' % fd, |
| 'set=%d' % fdset, |
| 'opaque=%s' % opaque] |
| if opts: |
| options.append(opts) |
| |
| self._args.append('-add-fd') |
| self._args.append(','.join(options)) |
| return self |
| |
| def send_fd_scm(self, fd_file_path): |
| # In iotest.py, the qmp should always use unix socket. |
| assert self._qmp.is_scm_available() |
| bin = socket_scm_helper |
| if os.path.exists(bin) == False: |
| print "Scm help program does not present, path '%s'." % bin |
| return -1 |
| fd_param = ["%s" % bin, |
| "%d" % self._qmp.get_sock_fd(), |
| "%s" % fd_file_path] |
| devnull = open('/dev/null', 'rb') |
| p = subprocess.Popen(fd_param, stdin=devnull, stdout=sys.stdout, |
| stderr=sys.stderr) |
| return p.wait() |
| |
| def launch(self): |
| '''Launch the VM and establish a QMP connection''' |
| devnull = open('/dev/null', 'rb') |
| qemulog = open(self._qemu_log_path, 'wb') |
| try: |
| self._qmp = qmp.QEMUMonitorProtocol(self._monitor_path, server=True) |
| self._popen = subprocess.Popen(self._args, stdin=devnull, stdout=qemulog, |
| stderr=subprocess.STDOUT) |
| self._qmp.accept() |
| except: |
| os.remove(self._monitor_path) |
| raise |
| |
| def shutdown(self): |
| '''Terminate the VM and clean up''' |
| if not self._popen is None: |
| self._qmp.cmd('quit') |
| self._popen.wait() |
| os.remove(self._monitor_path) |
| os.remove(self._qemu_log_path) |
| self._popen = None |
| |
| underscore_to_dash = string.maketrans('_', '-') |
| def qmp(self, cmd, **args): |
| '''Invoke a QMP command and return the result dict''' |
| qmp_args = dict() |
| for k in args.keys(): |
| qmp_args[k.translate(self.underscore_to_dash)] = args[k] |
| |
| return self._qmp.cmd(cmd, args=qmp_args) |
| |
| def get_qmp_event(self, wait=False): |
| '''Poll for one queued QMP events and return it''' |
| return self._qmp.pull_event(wait=wait) |
| |
| def get_qmp_events(self, wait=False): |
| '''Poll for queued QMP events and return a list of dicts''' |
| events = self._qmp.get_events(wait=wait) |
| self._qmp.clear_events() |
| return events |
| |
| 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 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', self.image_len) |
| self.assert_qmp(event, 'data/len', self.image_len) |
| completed = True |
| |
| self.assert_no_active_block_jobs() |
| return event |
| |
| 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.notrun' % seq, 'wb').write(reason + '\n') |
| print '%s not run: %s' % (seq, reason) |
| sys.exit(0) |
| |
| def main(supported_fmts=[]): |
| '''Run tests''' |
| |
| if supported_fmts and (imgfmt not in supported_fmts): |
| notrun('not suitable for this image format: %s' % imgfmt) |
| |
| # 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 |
| output = StringIO.StringIO() |
| |
| class MyTestRunner(unittest.TextTestRunner): |
| def __init__(self, stream=output, descriptions=True, verbosity=1): |
| unittest.TextTestRunner.__init__(self, stream, descriptions, verbosity) |
| |
| # unittest.main() will use sys.exit() so expect a SystemExit exception |
| try: |
| unittest.main(testRunner=MyTestRunner) |
| finally: |
| sys.stderr.write(re.sub(r'Ran (\d+) tests? in [\d.]+s', r'Ran \1 tests', output.getvalue())) |
