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Up to [Qemu by Fabrice Bellard] / qemu / tests / qemu-iotests|
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1.1 root 1: # Common utilities and Python wrappers for qemu-iotests
2: #
3: # Copyright (C) 2012 IBM Corp.
4: #
5: # This program is free software; you can redistribute it and/or modify
6: # it under the terms of the GNU General Public License as published by
7: # the Free Software Foundation; either version 2 of the License, or
8: # (at your option) any later version.
9: #
10: # This program is distributed in the hope that it will be useful,
11: # but WITHOUT ANY WARRANTY; without even the implied warranty of
12: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13: # GNU General Public License for more details.
14: #
15: # You should have received a copy of the GNU General Public License
16: # along with this program. If not, see <http://www.gnu.org/licenses/>.
17: #
18:
19: import os
20: import re
21: import subprocess
22: import unittest
23: import sys; sys.path.append(os.path.join(os.path.dirname(__file__), '..', '..', 'QMP'))
24: import qmp
25:
26: __all__ = ['imgfmt', 'imgproto', 'test_dir' 'qemu_img', 'qemu_io',
27: 'VM', 'QMPTestCase', 'notrun', 'main']
28:
29: # This will not work if arguments or path contain spaces but is necessary if we
30: # want to support the override options that ./check supports.
31: qemu_img_args = os.environ.get('QEMU_IMG', 'qemu-img').strip().split(' ')
32: qemu_io_args = os.environ.get('QEMU_IO', 'qemu-io').strip().split(' ')
33: qemu_args = os.environ.get('QEMU', 'qemu').strip().split(' ')
34:
35: imgfmt = os.environ.get('IMGFMT', 'raw')
36: imgproto = os.environ.get('IMGPROTO', 'file')
37: test_dir = os.environ.get('TEST_DIR', '/var/tmp')
38:
39: def qemu_img(*args):
40: '''Run qemu-img and return the exit code'''
41: devnull = open('/dev/null', 'r+')
42: return subprocess.call(qemu_img_args + list(args), stdin=devnull, stdout=devnull)
43:
44: def qemu_io(*args):
45: '''Run qemu-io and return the stdout data'''
46: args = qemu_io_args + list(args)
47: return subprocess.Popen(args, stdout=subprocess.PIPE).communicate()[0]
48:
49: class VM(object):
50: '''A QEMU VM'''
51:
52: def __init__(self):
53: self._monitor_path = os.path.join(test_dir, 'qemu-mon.%d' % os.getpid())
54: self._qemu_log_path = os.path.join(test_dir, 'qemu-log.%d' % os.getpid())
55: self._args = qemu_args + ['-chardev',
56: 'socket,id=mon,path=' + self._monitor_path,
57: '-mon', 'chardev=mon,mode=control', '-nographic']
58: self._num_drives = 0
59:
60: def add_drive(self, path, opts=''):
61: '''Add a virtio-blk drive to the VM'''
62: options = ['if=virtio',
63: 'format=%s' % imgfmt,
64: 'cache=none',
65: 'file=%s' % path,
66: 'id=drive%d' % self._num_drives]
67: if opts:
68: options.append(opts)
69:
70: self._args.append('-drive')
71: self._args.append(','.join(options))
72: self._num_drives += 1
73: return self
74:
75: def launch(self):
76: '''Launch the VM and establish a QMP connection'''
77: devnull = open('/dev/null', 'rb')
78: qemulog = open(self._qemu_log_path, 'wb')
79: try:
80: self._qmp = qmp.QEMUMonitorProtocol(self._monitor_path, server=True)
81: self._popen = subprocess.Popen(self._args, stdin=devnull, stdout=qemulog,
82: stderr=subprocess.STDOUT)
83: self._qmp.accept()
84: except:
85: os.remove(self._monitor_path)
86: raise
87:
88: def shutdown(self):
89: '''Terminate the VM and clean up'''
90: if not self._popen is None:
91: self._qmp.cmd('quit')
92: self._popen.wait()
93: os.remove(self._monitor_path)
94: os.remove(self._qemu_log_path)
95: self._popen = None
96:
97: def qmp(self, cmd, **args):
98: '''Invoke a QMP command and return the result dict'''
99: return self._qmp.cmd(cmd, args=args)
100:
101: def get_qmp_events(self, wait=False):
102: '''Poll for queued QMP events and return a list of dicts'''
103: events = self._qmp.get_events(wait=wait)
104: self._qmp.clear_events()
105: return events
106:
107: index_re = re.compile(r'([^\[]+)\[([^\]]+)\]')
108:
109: class QMPTestCase(unittest.TestCase):
110: '''Abstract base class for QMP test cases'''
111:
112: def dictpath(self, d, path):
113: '''Traverse a path in a nested dict'''
114: for component in path.split('/'):
115: m = index_re.match(component)
116: if m:
117: component, idx = m.groups()
118: idx = int(idx)
119:
120: if not isinstance(d, dict) or component not in d:
121: self.fail('failed path traversal for "%s" in "%s"' % (path, str(d)))
122: d = d[component]
123:
124: if m:
125: if not isinstance(d, list):
126: self.fail('path component "%s" in "%s" is not a list in "%s"' % (component, path, str(d)))
127: try:
128: d = d[idx]
129: except IndexError:
130: self.fail('invalid index "%s" in path "%s" in "%s"' % (idx, path, str(d)))
131: return d
132:
133: def assert_qmp(self, d, path, value):
134: '''Assert that the value for a specific path in a QMP dict matches'''
135: result = self.dictpath(d, path)
136: self.assertEqual(result, value, 'values not equal "%s" and "%s"' % (str(result), str(value)))
137:
138: def notrun(reason):
139: '''Skip this test suite'''
140: # Each test in qemu-iotests has a number ("seq")
141: seq = os.path.basename(sys.argv[0])
142:
143: open('%s.notrun' % seq, 'wb').write(reason + '\n')
144: print '%s not run: %s' % (seq, reason)
145: sys.exit(0)
146:
147: def main(supported_fmts=[]):
148: '''Run tests'''
149:
150: if supported_fmts and (imgfmt not in supported_fmts):
151: notrun('not suitable for this image format: %s' % imgfmt)
152:
153: # We need to filter out the time taken from the output so that qemu-iotest
154: # can reliably diff the results against master output.
155: import StringIO
156: output = StringIO.StringIO()
157:
158: class MyTestRunner(unittest.TextTestRunner):
159: def __init__(self, stream=output, descriptions=True, verbosity=1):
160: unittest.TextTestRunner.__init__(self, stream, descriptions, verbosity)
161:
162: # unittest.main() will use sys.exit() so expect a SystemExit exception
163: try:
164: unittest.main(testRunner=MyTestRunner)
165: finally:
166: sys.stderr.write(re.sub(r'Ran (\d+) test[s] in [\d.]+s', r'Ran \1 tests', output.getvalue()))
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