fc17c25931
Specifying the cache mode for a driver without a medium is not a useful thing to do: As long as there is no medium, the cache mode doesn't make a difference, and once the 'change' command is used to insert a medium, it ignores the old cache mode and makes the new medium use cache=writethrough. Later patches will make it an error to specify the cache mode for an empty drive. Remove the corresponding test case. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com>
425 lines
16 KiB
Python
425 lines
16 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 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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sys.path.append(os.path.join(os.path.dirname(__file__), '..', '..', 'scripts', 'qmp'))
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import qmp
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import qtest
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import struct
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__all__ = ['imgfmt', 'imgproto', 'test_dir' 'qemu_img', 'qemu_io',
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'VM', 'QMPTestCase', 'notrun', 'main']
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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_args = [os.environ.get('QEMU_PROG', 'qemu')]
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if os.environ.get('QEMU_OPTIONS'):
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qemu_args += os.environ['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', '/var/tmp')
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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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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), stdout=subprocess.PIPE)
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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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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 compare_images(img1, img2):
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'''Return True if two image files are identical'''
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return qemu_img('compare', '-f', imgfmt,
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'-F', imgfmt, 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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# Test if 'match' is a recursive subset of 'event'
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def event_match(event, match=None):
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if match is None:
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return True
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for key in match:
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if key in event:
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if isinstance(event[key], dict):
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if not event_match(event[key], match[key]):
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return False
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elif event[key] != match[key]:
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return False
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else:
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return False
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return True
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class VM(object):
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'''A QEMU VM'''
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def __init__(self):
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self._monitor_path = os.path.join(test_dir, 'qemu-mon.%d' % os.getpid())
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self._qemu_log_path = os.path.join(test_dir, 'qemu-log.%d' % os.getpid())
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self._qtest_path = os.path.join(test_dir, 'qemu-qtest.%d' % os.getpid())
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self._args = qemu_args + ['-chardev',
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'socket,id=mon,path=' + self._monitor_path,
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'-mon', 'chardev=mon,mode=control',
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'-qtest', 'unix:path=' + self._qtest_path,
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'-machine', 'accel=qtest',
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'-display', 'none', '-vga', 'none']
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self._num_drives = 0
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self._events = []
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# This can be used to add an unused monitor instance.
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def add_monitor_telnet(self, ip, port):
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args = 'tcp:%s:%d,server,nowait,telnet' % (ip, port)
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self._args.append('-monitor')
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self._args.append(args)
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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'):
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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' % imgfmt)
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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 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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def add_fd(self, fd, fdset, opaque, opts=''):
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'''Pass a file descriptor to the VM'''
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options = ['fd=%d' % fd,
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'set=%d' % fdset,
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'opaque=%s' % opaque]
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if opts:
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options.append(opts)
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self._args.append('-add-fd')
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self._args.append(','.join(options))
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return self
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def send_fd_scm(self, fd_file_path):
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# In iotest.py, the qmp should always use unix socket.
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assert self._qmp.is_scm_available()
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bin = socket_scm_helper
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if os.path.exists(bin) == False:
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print "Scm help program does not present, path '%s'." % bin
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return -1
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fd_param = ["%s" % bin,
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"%d" % self._qmp.get_sock_fd(),
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"%s" % fd_file_path]
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devnull = open('/dev/null', 'rb')
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p = subprocess.Popen(fd_param, stdin=devnull, stdout=sys.stdout,
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stderr=sys.stderr)
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return p.wait()
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def launch(self):
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'''Launch the VM and establish a QMP connection'''
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devnull = open('/dev/null', 'rb')
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qemulog = open(self._qemu_log_path, 'wb')
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try:
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self._qmp = qmp.QEMUMonitorProtocol(self._monitor_path, server=True)
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self._qtest = qtest.QEMUQtestProtocol(self._qtest_path, server=True)
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self._popen = subprocess.Popen(self._args, stdin=devnull, stdout=qemulog,
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stderr=subprocess.STDOUT)
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self._qmp.accept()
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self._qtest.accept()
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except:
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os.remove(self._monitor_path)
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raise
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def shutdown(self):
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'''Terminate the VM and clean up'''
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if not self._popen is None:
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self._qmp.cmd('quit')
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exitcode = self._popen.wait()
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if exitcode < 0:
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sys.stderr.write('qemu received signal %i: %s\n' % (-exitcode, ' '.join(self._args)))
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os.remove(self._monitor_path)
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os.remove(self._qtest_path)
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os.remove(self._qemu_log_path)
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self._popen = None
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underscore_to_dash = string.maketrans('_', '-')
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def qmp(self, cmd, conv_keys=True, **args):
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'''Invoke a QMP command and return the result dict'''
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qmp_args = dict()
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for k in args.keys():
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if conv_keys:
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qmp_args[k.translate(self.underscore_to_dash)] = args[k]
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else:
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qmp_args[k] = args[k]
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return self._qmp.cmd(cmd, args=qmp_args)
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def qtest(self, cmd):
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'''Send a qtest command to guest'''
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return self._qtest.cmd(cmd)
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def get_qmp_event(self, wait=False):
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'''Poll for one queued QMP events and return it'''
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if len(self._events) > 0:
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return self._events.pop(0)
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return self._qmp.pull_event(wait=wait)
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def get_qmp_events(self, wait=False):
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'''Poll for queued QMP events and return a list of dicts'''
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events = self._qmp.get_events(wait=wait)
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events.extend(self._events)
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del self._events[:]
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self._qmp.clear_events()
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return events
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def event_wait(self, name='BLOCK_JOB_COMPLETED', timeout=60.0, match=None):
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# Search cached events
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for event in self._events:
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if (event['event'] == name) and event_match(event, match):
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self._events.remove(event)
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return event
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# Poll for new events
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while True:
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event = self._qmp.pull_event(wait=timeout)
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if (event['event'] == name) and event_match(event, match):
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return event
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self._events.append(event)
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return None
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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 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 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 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 main(supported_fmts=[], supported_oses=['linux']):
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'''Run tests'''
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debug = '-d' in sys.argv
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verbosity = 1
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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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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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# We need to filter out the time taken from the output so that qemu-iotest
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# can reliably diff the results against master output.
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import StringIO
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if debug:
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output = sys.stdout
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verbosity = 2
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sys.argv.remove('-d')
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else:
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output = StringIO.StringIO()
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class MyTestRunner(unittest.TextTestRunner):
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def __init__(self, stream=output, descriptions=True, verbosity=verbosity):
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unittest.TextTestRunner.__init__(self, stream, descriptions, verbosity)
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# unittest.main() will use sys.exit() so expect a SystemExit exception
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try:
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unittest.main(testRunner=MyTestRunner)
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finally:
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if not debug:
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sys.stderr.write(re.sub(r'Ran (\d+) tests? in [\d.]+s', r'Ran \1 tests', output.getvalue()))
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