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
165
166
167
168
|
import os
import shutil
import tempfile
from unittest import mock
from cloudinit import dmi, subp, util
from tests.unittests import helpers
class TestReadDMIData(helpers.FilesystemMockingTestCase):
def setUp(self):
super(TestReadDMIData, self).setUp()
self.new_root = tempfile.mkdtemp()
self.addCleanup(shutil.rmtree, self.new_root)
self.reRoot(self.new_root)
p = mock.patch("cloudinit.dmi.is_container", return_value=False)
self.addCleanup(p.stop)
self._m_is_container = p.start()
p = mock.patch("cloudinit.dmi.is_FreeBSD", return_value=False)
self.addCleanup(p.stop)
self._m_is_FreeBSD = p.start()
def _create_sysfs_parent_directory(self):
util.ensure_dir(os.path.join("sys", "class", "dmi", "id"))
def _create_sysfs_file(self, key, content):
"""Mocks the sys path found on Linux systems."""
self._create_sysfs_parent_directory()
dmi_key = "/sys/class/dmi/id/{0}".format(key)
util.write_file(dmi_key, content)
def _configure_dmidecode_return(self, key, content, error=None):
"""
In order to test a missing sys path and call outs to dmidecode, this
function fakes the results of dmidecode to test the results.
"""
def _dmidecode_subp(cmd):
if cmd[-1] != key:
raise subp.ProcessExecutionError()
return (content, error)
self.patched_funcs.enter_context(
mock.patch("cloudinit.dmi.subp.which", side_effect=lambda _: True)
)
self.patched_funcs.enter_context(
mock.patch("cloudinit.dmi.subp.subp", side_effect=_dmidecode_subp)
)
def _configure_kenv_return(self, key, content, error=None):
"""
In order to test a FreeBSD system call outs to kenv, this
function fakes the results of kenv to test the results.
"""
def _kenv_subp(cmd):
if cmd[-1] != dmi.DMIDECODE_TO_KERNEL[key].freebsd:
raise subp.ProcessExecutionError()
return (content, error)
self.patched_funcs.enter_context(
mock.patch("cloudinit.dmi.subp.subp", side_effect=_kenv_subp)
)
def patch_mapping(self, new_mapping):
self.patched_funcs.enter_context(
mock.patch("cloudinit.dmi.DMIDECODE_TO_KERNEL", new_mapping)
)
def test_sysfs_used_with_key_in_mapping_and_file_on_disk(self):
self.patch_mapping({"mapped-key": dmi.kdmi("mapped-value", None)})
expected_dmi_value = "sys-used-correctly"
self._create_sysfs_file("mapped-value", expected_dmi_value)
self._configure_dmidecode_return("mapped-key", "wrong-wrong-wrong")
self.assertEqual(expected_dmi_value, dmi.read_dmi_data("mapped-key"))
def test_dmidecode_used_if_no_sysfs_file_on_disk(self):
self.patch_mapping({})
self._create_sysfs_parent_directory()
expected_dmi_value = "dmidecode-used"
self._configure_dmidecode_return("use-dmidecode", expected_dmi_value)
with mock.patch("cloudinit.util.os.uname") as m_uname:
m_uname.return_value = (
"x-sysname",
"x-nodename",
"x-release",
"x-version",
"x86_64",
)
self.assertEqual(
expected_dmi_value, dmi.read_dmi_data("use-dmidecode")
)
def test_dmidecode_not_used_on_arm(self):
self.patch_mapping({})
print("current =%s", subp)
self._create_sysfs_parent_directory()
dmi_val = "from-dmidecode"
dmi_name = "use-dmidecode"
self._configure_dmidecode_return(dmi_name, dmi_val)
print("now =%s", subp)
expected = {"armel": None, "aarch64": dmi_val, "x86_64": dmi_val}
found = {}
# we do not run the 'dmi-decode' binary on some arches
# verify that anything requested that is not in the sysfs dir
# will return None on those arches.
with mock.patch("cloudinit.util.os.uname") as m_uname:
for arch in expected:
m_uname.return_value = (
"x-sysname",
"x-nodename",
"x-release",
"x-version",
arch,
)
print("now2 =%s", subp)
found[arch] = dmi.read_dmi_data(dmi_name)
self.assertEqual(expected, found)
def test_none_returned_if_neither_source_has_data(self):
self.patch_mapping({})
self._configure_dmidecode_return("key", "value")
self.assertIsNone(dmi.read_dmi_data("expect-fail"))
def test_none_returned_if_dmidecode_not_in_path(self):
self.patched_funcs.enter_context(
mock.patch.object(subp, "which", lambda _: False)
)
self.patch_mapping({})
self.assertIsNone(dmi.read_dmi_data("expect-fail"))
def test_empty_string_returned_instead_of_foxfox(self):
# uninitialized dmi values show as \xff, return empty string
my_len = 32
dmi_value = b"\xff" * my_len + b"\n"
expected = ""
dmi_key = "system-product-name"
sysfs_key = "product_name"
self._create_sysfs_file(sysfs_key, dmi_value)
self.assertEqual(expected, dmi.read_dmi_data(dmi_key))
def test_container_returns_none(self):
"""In a container read_dmi_data should always return None."""
# first verify we get the value if not in container
self._m_is_container.return_value = False
key, val = ("system-product-name", "my_product")
self._create_sysfs_file("product_name", val)
self.assertEqual(val, dmi.read_dmi_data(key))
# then verify in container returns None
self._m_is_container.return_value = True
self.assertIsNone(dmi.read_dmi_data(key))
def test_container_returns_none_on_unknown(self):
"""In a container even bogus keys return None."""
self._m_is_container.return_value = True
self._create_sysfs_file("product_name", "should-be-ignored")
self.assertIsNone(dmi.read_dmi_data("bogus"))
self.assertIsNone(dmi.read_dmi_data("system-product-name"))
def test_freebsd_uses_kenv(self):
"""On a FreeBSD system, kenv is called."""
self._m_is_FreeBSD.return_value = True
key, val = ("system-product-name", "my_product")
self._configure_kenv_return(key, val)
self.assertEqual(dmi.read_dmi_data(key), val)
|
