aboutsummaryrefslogtreecommitdiff
path: root/tests/qemu-iotests/iotests.py
blob: ec1a86a63240611ffe99d9c00ee71ba0c43c738f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
# 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 unittest
import sys; sys.path.append(os.path.join(os.path.dirname(__file__), '..', '..', 'QMP'))
import qmp

__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').split(' ')
qemu_io_args = os.environ.get('QEMU_IO', 'qemu-io').split(' ')
qemu_args = os.environ.get('QEMU', 'qemu').split(' ')

imgfmt = os.environ.get('IMGFMT', 'raw')
imgproto = os.environ.get('IMGPROTO', 'file')
test_dir = os.environ.get('TEST_DIR', '/var/tmp')

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_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]

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', '-nographic']
        self._num_drives = 0

    def add_drive(self, path, opts=''):
        '''Add a virtio-blk drive to the VM'''
        options = ['if=virtio',
                   'format=%s' % imgfmt,
                   'cache=none',
                   '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 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'''
        self._qmp.cmd('quit')
        self._popen.wait()
        os.remove(self._monitor_path)
        os.remove(self._qemu_log_path)

    def qmp(self, cmd, **args):
        '''Invoke a QMP command and return the result dict'''
        return self._qmp.cmd(cmd, args=args)

    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(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 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+) test[s] in [\d.]+s', r'Ran \1 tests', output.getvalue()))