f4844ac0ad
The scratch/ (TEST_DIR) directory is not automatically cleaned up after
test execution. It is the responsibility of tests to remove any files
they create.
A nice way of doing this is to declare files at the beginning of the
test and automatically remove them with a context manager:
with iotests.FilePath('test.img') as img_path:
qemu_img(...)
qemu_io(...)
# img_path is guaranteed to be deleted here
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 20170824072202.26818-3-stefanha@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
478 lines
17 KiB
Python
478 lines
17 KiB
Python
# Common utilities and Python wrappers for qemu-iotests
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#
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# Copyright (C) 2012 IBM Corp.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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import errno
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import os
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import re
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import subprocess
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import string
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import unittest
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import sys
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sys.path.append(os.path.join(os.path.dirname(__file__), '..', '..', 'scripts'))
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import qtest
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import struct
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import json
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import signal
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# This will not work if arguments contain spaces but is necessary if we
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# want to support the override options that ./check supports.
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qemu_img_args = [os.environ.get('QEMU_IMG_PROG', 'qemu-img')]
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if os.environ.get('QEMU_IMG_OPTIONS'):
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qemu_img_args += os.environ['QEMU_IMG_OPTIONS'].strip().split(' ')
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qemu_io_args = [os.environ.get('QEMU_IO_PROG', 'qemu-io')]
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if os.environ.get('QEMU_IO_OPTIONS'):
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qemu_io_args += os.environ['QEMU_IO_OPTIONS'].strip().split(' ')
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qemu_nbd_args = [os.environ.get('QEMU_NBD_PROG', 'qemu-nbd')]
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if os.environ.get('QEMU_NBD_OPTIONS'):
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qemu_nbd_args += os.environ['QEMU_NBD_OPTIONS'].strip().split(' ')
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qemu_prog = os.environ.get('QEMU_PROG', 'qemu')
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qemu_opts = os.environ.get('QEMU_OPTIONS', '').strip().split(' ')
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imgfmt = os.environ.get('IMGFMT', 'raw')
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imgproto = os.environ.get('IMGPROTO', 'file')
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test_dir = os.environ.get('TEST_DIR')
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output_dir = os.environ.get('OUTPUT_DIR', '.')
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cachemode = os.environ.get('CACHEMODE')
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qemu_default_machine = os.environ.get('QEMU_DEFAULT_MACHINE')
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socket_scm_helper = os.environ.get('SOCKET_SCM_HELPER', 'socket_scm_helper')
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debug = False
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def qemu_img(*args):
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'''Run qemu-img and return the exit code'''
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devnull = open('/dev/null', 'r+')
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exitcode = subprocess.call(qemu_img_args + list(args), stdin=devnull, stdout=devnull)
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if exitcode < 0:
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sys.stderr.write('qemu-img received signal %i: %s\n' % (-exitcode, ' '.join(qemu_img_args + list(args))))
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return exitcode
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def qemu_img_verbose(*args):
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'''Run qemu-img without suppressing its output and return the exit code'''
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exitcode = subprocess.call(qemu_img_args + list(args))
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if exitcode < 0:
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sys.stderr.write('qemu-img received signal %i: %s\n' % (-exitcode, ' '.join(qemu_img_args + list(args))))
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return exitcode
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def qemu_img_pipe(*args):
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'''Run qemu-img and return its output'''
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subp = subprocess.Popen(qemu_img_args + list(args),
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stdout=subprocess.PIPE,
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stderr=subprocess.STDOUT)
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exitcode = subp.wait()
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if exitcode < 0:
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sys.stderr.write('qemu-img received signal %i: %s\n' % (-exitcode, ' '.join(qemu_img_args + list(args))))
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return subp.communicate()[0]
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def qemu_io(*args):
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'''Run qemu-io and return the stdout data'''
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args = qemu_io_args + list(args)
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subp = subprocess.Popen(args, stdout=subprocess.PIPE,
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stderr=subprocess.STDOUT)
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exitcode = subp.wait()
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if exitcode < 0:
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sys.stderr.write('qemu-io received signal %i: %s\n' % (-exitcode, ' '.join(args)))
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return subp.communicate()[0]
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def qemu_nbd(*args):
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'''Run qemu-nbd in daemon mode and return the parent's exit code'''
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return subprocess.call(qemu_nbd_args + ['--fork'] + list(args))
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def compare_images(img1, img2, fmt1=imgfmt, fmt2=imgfmt):
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'''Return True if two image files are identical'''
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return qemu_img('compare', '-f', fmt1,
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'-F', fmt2, img1, img2) == 0
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def create_image(name, size):
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'''Create a fully-allocated raw image with sector markers'''
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file = open(name, 'w')
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i = 0
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while i < size:
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sector = struct.pack('>l504xl', i / 512, i / 512)
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file.write(sector)
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i = i + 512
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file.close()
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def image_size(img):
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'''Return image's virtual size'''
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r = qemu_img_pipe('info', '--output=json', '-f', imgfmt, img)
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return json.loads(r)['virtual-size']
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test_dir_re = re.compile(r"%s" % test_dir)
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def filter_test_dir(msg):
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return test_dir_re.sub("TEST_DIR", msg)
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win32_re = re.compile(r"\r")
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def filter_win32(msg):
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return win32_re.sub("", msg)
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qemu_io_re = re.compile(r"[0-9]* ops; [0-9\/:. sec]* \([0-9\/.inf]* [EPTGMKiBbytes]*\/sec and [0-9\/.inf]* ops\/sec\)")
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def filter_qemu_io(msg):
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msg = filter_win32(msg)
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return qemu_io_re.sub("X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)", msg)
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chown_re = re.compile(r"chown [0-9]+:[0-9]+")
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def filter_chown(msg):
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return chown_re.sub("chown UID:GID", msg)
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def filter_qmp_event(event):
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'''Filter a QMP event dict'''
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event = dict(event)
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if 'timestamp' in event:
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event['timestamp']['seconds'] = 'SECS'
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event['timestamp']['microseconds'] = 'USECS'
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return event
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def log(msg, filters=[]):
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for flt in filters:
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msg = flt(msg)
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print msg
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class Timeout:
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def __init__(self, seconds, errmsg = "Timeout"):
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self.seconds = seconds
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self.errmsg = errmsg
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def __enter__(self):
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signal.signal(signal.SIGALRM, self.timeout)
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signal.setitimer(signal.ITIMER_REAL, self.seconds)
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return self
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def __exit__(self, type, value, traceback):
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signal.setitimer(signal.ITIMER_REAL, 0)
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return False
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def timeout(self, signum, frame):
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raise Exception(self.errmsg)
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class FilePath(object):
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'''An auto-generated filename that cleans itself up.
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Use this context manager to generate filenames and ensure that the file
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gets deleted::
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with TestFilePath('test.img') as img_path:
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qemu_img('create', img_path, '1G')
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# migration_sock_path is automatically deleted
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'''
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def __init__(self, name):
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filename = '{0}-{1}'.format(os.getpid(), name)
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self.path = os.path.join(test_dir, filename)
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def __enter__(self):
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return self.path
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def __exit__(self, exc_type, exc_val, exc_tb):
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try:
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os.remove(self.path)
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except OSError:
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pass
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return False
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class VM(qtest.QEMUQtestMachine):
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'''A QEMU VM'''
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def __init__(self, path_suffix=''):
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name = "qemu%s-%d" % (path_suffix, os.getpid())
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super(VM, self).__init__(qemu_prog, qemu_opts, name=name,
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test_dir=test_dir,
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socket_scm_helper=socket_scm_helper)
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if debug:
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self._debug = True
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self._num_drives = 0
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def add_device(self, opts):
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self._args.append('-device')
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self._args.append(opts)
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return self
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def add_drive_raw(self, opts):
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self._args.append('-drive')
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self._args.append(opts)
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return self
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def add_drive(self, path, opts='', interface='virtio', format=imgfmt):
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'''Add a virtio-blk drive to the VM'''
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options = ['if=%s' % interface,
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'id=drive%d' % self._num_drives]
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if path is not None:
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options.append('file=%s' % path)
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options.append('format=%s' % format)
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options.append('cache=%s' % cachemode)
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if opts:
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options.append(opts)
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self._args.append('-drive')
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self._args.append(','.join(options))
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self._num_drives += 1
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return self
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def add_blockdev(self, opts):
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self._args.append('-blockdev')
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if isinstance(opts, str):
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self._args.append(opts)
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else:
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self._args.append(','.join(opts))
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return self
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def add_incoming(self, addr):
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self._args.append('-incoming')
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self._args.append(addr)
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return self
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def pause_drive(self, drive, event=None):
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'''Pause drive r/w operations'''
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if not event:
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self.pause_drive(drive, "read_aio")
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self.pause_drive(drive, "write_aio")
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return
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self.qmp('human-monitor-command',
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command_line='qemu-io %s "break %s bp_%s"' % (drive, event, drive))
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def resume_drive(self, drive):
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self.qmp('human-monitor-command',
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command_line='qemu-io %s "remove_break bp_%s"' % (drive, drive))
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def hmp_qemu_io(self, drive, cmd):
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'''Write to a given drive using an HMP command'''
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return self.qmp('human-monitor-command',
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command_line='qemu-io %s "%s"' % (drive, cmd))
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index_re = re.compile(r'([^\[]+)\[([^\]]+)\]')
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class QMPTestCase(unittest.TestCase):
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'''Abstract base class for QMP test cases'''
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def dictpath(self, d, path):
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'''Traverse a path in a nested dict'''
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for component in path.split('/'):
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m = index_re.match(component)
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if m:
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component, idx = m.groups()
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idx = int(idx)
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if not isinstance(d, dict) or component not in d:
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self.fail('failed path traversal for "%s" in "%s"' % (path, str(d)))
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d = d[component]
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if m:
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if not isinstance(d, list):
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self.fail('path component "%s" in "%s" is not a list in "%s"' % (component, path, str(d)))
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try:
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d = d[idx]
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except IndexError:
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self.fail('invalid index "%s" in path "%s" in "%s"' % (idx, path, str(d)))
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return d
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def flatten_qmp_object(self, obj, output=None, basestr=''):
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if output is None:
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output = dict()
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if isinstance(obj, list):
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for i in range(len(obj)):
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self.flatten_qmp_object(obj[i], output, basestr + str(i) + '.')
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elif isinstance(obj, dict):
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for key in obj:
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self.flatten_qmp_object(obj[key], output, basestr + key + '.')
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else:
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output[basestr[:-1]] = obj # Strip trailing '.'
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return output
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def qmp_to_opts(self, obj):
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obj = self.flatten_qmp_object(obj)
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output_list = list()
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for key in obj:
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output_list += [key + '=' + obj[key]]
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return ','.join(output_list)
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def assert_qmp_absent(self, d, path):
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try:
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result = self.dictpath(d, path)
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except AssertionError:
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return
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self.fail('path "%s" has value "%s"' % (path, str(result)))
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def assert_qmp(self, d, path, value):
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'''Assert that the value for a specific path in a QMP dict matches'''
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result = self.dictpath(d, path)
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self.assertEqual(result, value, 'values not equal "%s" and "%s"' % (str(result), str(value)))
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def assert_no_active_block_jobs(self):
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result = self.vm.qmp('query-block-jobs')
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self.assert_qmp(result, 'return', [])
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def assert_has_block_node(self, node_name=None, file_name=None):
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"""Issue a query-named-block-nodes and assert node_name and/or
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file_name is present in the result"""
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def check_equal_or_none(a, b):
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return a == None or b == None or a == b
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assert node_name or file_name
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result = self.vm.qmp('query-named-block-nodes')
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for x in result["return"]:
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if check_equal_or_none(x.get("node-name"), node_name) and \
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check_equal_or_none(x.get("file"), file_name):
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return
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self.assertTrue(False, "Cannot find %s %s in result:\n%s" % \
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(node_name, file_name, result))
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def assert_json_filename_equal(self, json_filename, reference):
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'''Asserts that the given filename is a json: filename and that its
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content is equal to the given reference object'''
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self.assertEqual(json_filename[:5], 'json:')
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self.assertEqual(self.flatten_qmp_object(json.loads(json_filename[5:])),
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self.flatten_qmp_object(reference))
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def cancel_and_wait(self, drive='drive0', force=False, resume=False):
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'''Cancel a block job and wait for it to finish, returning the event'''
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result = self.vm.qmp('block-job-cancel', device=drive, force=force)
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self.assert_qmp(result, 'return', {})
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if resume:
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self.vm.resume_drive(drive)
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cancelled = False
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result = None
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while not cancelled:
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for event in self.vm.get_qmp_events(wait=True):
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if event['event'] == 'BLOCK_JOB_COMPLETED' or \
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event['event'] == 'BLOCK_JOB_CANCELLED':
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self.assert_qmp(event, 'data/device', drive)
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result = event
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cancelled = True
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self.assert_no_active_block_jobs()
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return result
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def wait_until_completed(self, drive='drive0', check_offset=True):
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'''Wait for a block job to finish, returning the event'''
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completed = False
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while not completed:
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for event in self.vm.get_qmp_events(wait=True):
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if event['event'] == 'BLOCK_JOB_COMPLETED':
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self.assert_qmp(event, 'data/device', drive)
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self.assert_qmp_absent(event, 'data/error')
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if check_offset:
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self.assert_qmp(event, 'data/offset', event['data']['len'])
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completed = True
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self.assert_no_active_block_jobs()
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return event
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def wait_ready(self, drive='drive0'):
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'''Wait until a block job BLOCK_JOB_READY event'''
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f = {'data': {'type': 'mirror', 'device': drive } }
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event = self.vm.event_wait(name='BLOCK_JOB_READY', match=f)
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def wait_ready_and_cancel(self, drive='drive0'):
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self.wait_ready(drive=drive)
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event = self.cancel_and_wait(drive=drive)
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self.assertEquals(event['event'], 'BLOCK_JOB_COMPLETED')
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self.assert_qmp(event, 'data/type', 'mirror')
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self.assert_qmp(event, 'data/offset', event['data']['len'])
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def complete_and_wait(self, drive='drive0', wait_ready=True):
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'''Complete a block job and wait for it to finish'''
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if wait_ready:
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self.wait_ready(drive=drive)
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result = self.vm.qmp('block-job-complete', device=drive)
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self.assert_qmp(result, 'return', {})
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event = self.wait_until_completed(drive=drive)
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self.assert_qmp(event, 'data/type', 'mirror')
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def pause_job(self, job_id='job0'):
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result = self.vm.qmp('block-job-pause', device=job_id)
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self.assert_qmp(result, 'return', {})
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with Timeout(1, "Timeout waiting for job to pause"):
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while True:
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result = self.vm.qmp('query-block-jobs')
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for job in result['return']:
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if job['device'] == job_id and job['paused'] == True and job['busy'] == False:
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return job
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def notrun(reason):
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'''Skip this test suite'''
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# Each test in qemu-iotests has a number ("seq")
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seq = os.path.basename(sys.argv[0])
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open('%s/%s.notrun' % (output_dir, seq), 'wb').write(reason + '\n')
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print '%s not run: %s' % (seq, reason)
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sys.exit(0)
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def verify_image_format(supported_fmts=[]):
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if supported_fmts and (imgfmt not in supported_fmts):
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notrun('not suitable for this image format: %s' % imgfmt)
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def verify_platform(supported_oses=['linux']):
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if True not in [sys.platform.startswith(x) for x in supported_oses]:
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notrun('not suitable for this OS: %s' % sys.platform)
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def supports_quorum():
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return 'quorum' in qemu_img_pipe('--help')
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def verify_quorum():
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'''Skip test suite if quorum support is not available'''
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if not supports_quorum():
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notrun('quorum support missing')
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def main(supported_fmts=[], supported_oses=['linux']):
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'''Run tests'''
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global debug
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# We are using TEST_DIR and QEMU_DEFAULT_MACHINE as proxies to
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# indicate that we're not being run via "check". There may be
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# other things set up by "check" that individual test cases rely
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# on.
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if test_dir is None or qemu_default_machine is None:
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sys.stderr.write('Please run this test via the "check" script\n')
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sys.exit(os.EX_USAGE)
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debug = '-d' in sys.argv
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|
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()))
|