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
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
|
#!/usr/bin/env python3
# Copyright (C) 2015-2016 Red Hat, Inc. All rights reserved.
#
# This copyrighted material is made available to anyone wishing to use,
# modify, copy, or redistribute it subject to the terms and conditions
# of the GNU General Public License v.2.
#
# 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 string
import random
import functools
import xml.etree.ElementTree as Et
from collections import OrderedDict
import dbus
BUSNAME = "com.redhat.lvmdbus1"
MANAGER_INT = BUSNAME + '.Manager'
MANAGER_OBJ = '/' + BUSNAME.replace('.', '/') + '/Manager'
PV_INT = BUSNAME + ".Pv"
VG_INT = BUSNAME + ".Vg"
LV_INT = BUSNAME + ".Lv"
THINPOOL_INT = BUSNAME + ".ThinPool"
SNAPSHOT_INT = BUSNAME + ".Snapshot"
LV_COMMON_INT = BUSNAME + ".LvCommon"
JOB_INT = BUSNAME + ".Job"
CACHE_POOL_INT = BUSNAME + ".CachePool"
CACHE_LV_INT = BUSNAME + ".CachedLv"
THINPOOL_LV_PATH = '/' + THINPOOL_INT.replace('.', '/')
def rs(length, suffix, character_set=string.ascii_lowercase):
return ''.join(random.choice(character_set)
for _ in range(length)) + suffix
def mib(s):
return 1024 * 1024 * s
class DbusIntrospection(object):
@staticmethod
def introspect(xml_representation):
interfaces = {}
root = Et.fromstring(xml_representation)
for c in root:
if c.tag == "interface":
in_f = c.attrib['name']
interfaces[in_f] = \
dict(methods=OrderedDict(), properties={})
for nested in c:
if nested.tag == "method":
mn = nested.attrib['name']
interfaces[in_f]['methods'][mn] = OrderedDict()
for arg in nested:
if arg.tag == 'arg':
arg_dir = arg.attrib['direction']
if arg_dir == 'in':
n = arg.attrib['name']
else:
n = 'RETURN_VALUE'
arg_type = arg.attrib['type']
if n:
v = dict(
name=mn,
a_dir=arg_dir,
a_type=arg_type)
interfaces[in_f]['methods'][mn][n] = v
elif nested.tag == 'property':
pn = nested.attrib['name']
p_access = nested.attrib['access']
p_type = nested.attrib['type']
interfaces[in_f]['properties'][pn] = \
dict(p_access=p_access, p_type=p_type)
else:
pass
# print('Interfaces...')
# for k, v in list(interfaces.items()):
# print('Interface %s' % k)
# if v['methods']:
# for m, args in list(v['methods'].items()):
# print(' method: %s' % m)
# for a, aa in args.items():
# print(' method arg: %s type %s' %
# (a, aa['a_type']))
# if v['properties']:
# for p, d in list(v['properties'].items()):
# print(' Property: %s type= %s' % (p, d['p_type']))
# print('End interfaces')
return interfaces
def btsr(value):
t = type(value)
if t == dbus.Boolean:
return 'b'
elif t == dbus.ObjectPath:
return 'o'
elif t == dbus.String:
return 's'
elif t == dbus.Byte:
return 'y'
elif t == dbus.Int16:
return 'n'
elif t == dbus.Int32:
return 'i'
elif t == dbus.Int64:
return 'x'
elif t == dbus.UInt16:
return 'q'
elif t == dbus.UInt32:
return 'u'
elif t == dbus.UInt64:
return 't'
elif t == dbus.Double:
return 'd'
elif t == dbus.Struct:
rc = '('
for vt in value:
rc += btsr(vt)
rc += ')'
return rc
elif t == dbus.Array:
rc = "a"
for i in value:
rc += btsr(i)
break
return rc
else:
raise RuntimeError("Unhandled type %s" % str(t))
def verify_type(value, dbus_str_rep):
actual_str_rep = btsr(value)
if dbus_str_rep != actual_str_rep:
# print("%s ~= %s" % (dbus_str_rep, actual_str_rep))
# Unless we have a full filled out type we won't match exactly
if not dbus_str_rep.startswith(actual_str_rep):
raise RuntimeError("Incorrect type, expected= %s actual "
"= %s object= %s" %
(dbus_str_rep, actual_str_rep,
str(type(value))))
class RemoteObject(object):
def _set_props(self, props=None):
# print 'Fetching properties'
if not props:
# prop_fetch = dbus.Interface(self.bus.get_object(
# BUSNAME, self.object_path), 'org.freedesktop.DBus.Properties')
for i in range(0, 3):
try:
prop_fetch = dbus.Interface(self.bus.get_object(
BUSNAME, self.object_path),
'org.freedesktop.DBus.Properties')
props = prop_fetch.GetAll(self.interface)
break
except dbus.exceptions.DBusException as dbe:
if "GetAll" not in str(dbe):
raise dbe
if props:
for kl, vl in list(props.items()):
# Verify type is correct!
verify_type(vl,
self.introspect[self.interface]['properties'][kl]['p_type'])
setattr(self, kl, vl)
def __init__(self, specified_bus, object_path, interface, introspect,
properties=None):
self.object_path = object_path
self.interface = interface
self.bus = specified_bus
self.introspect = introspect
self.dbus_method = dbus.Interface(specified_bus.get_object(
BUSNAME, self.object_path), self.interface)
self._set_props(properties)
def __getattr__(self, item):
if hasattr(self.dbus_method, item):
return functools.partial(self._wrapper, item)
else:
return functools.partial(self, item)
def _wrapper(self, _method_name, *args, **kwargs):
result = getattr(self.dbus_method, _method_name)(*args, **kwargs)
# print("DEBUG: %s.%s result %s" %
# (self.interface, _method_name, str(type(result))))
if 'RETURN_VALUE' in self.introspect[
self.interface]['methods'][_method_name]:
r_type = self.introspect[
self.interface]['methods'][
_method_name]['RETURN_VALUE']['a_type']
verify_type(result, r_type)
return result
def update(self):
self._set_props()
class ClientProxy(object):
@staticmethod
def _intf_short_name(nm):
return nm.split('.')[-1:][0]
def __init__(self, specified_bus, object_path, interface=None, props=None):
i = dbus.Interface(specified_bus.get_object(
BUSNAME, object_path), 'org.freedesktop.DBus.Introspectable')
introspection_xml = i.Introspect()
# import xml.dom.minidom
#
# xml = xml.dom.minidom.parseString(introspection_xml)
# print(xml.toprettyxml())
self.intro_spect = DbusIntrospection.introspect(introspection_xml)
for k in self.intro_spect.keys():
sn = ClientProxy._intf_short_name(k)
# print('Client proxy has interface: %s %s' % (k, sn))
if interface and interface == k and props is not None:
ro = RemoteObject(specified_bus, object_path, k,
self.intro_spect, props)
else:
ro = RemoteObject(specified_bus, object_path, k,
self.intro_spect)
setattr(self, sn, ro)
self.object_path = object_path
def update(self):
# Go through all interfaces and update them
for int_f in self.intro_spect.keys():
sn = ClientProxy._intf_short_name(int_f)
getattr(self, sn).update()
|
