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
|
# 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/>.
from . import cfg
def _compare_construction(o_state, new_state):
# We need to check to see if the objects would get constructed
# the same
existing_ctor, existing_path = o_state.creation_signature()
new_ctor, new_path = new_state.creation_signature()
# print("%s == %s and %s == %s" % (str(existing_ctor), str(new_ctor),
# str(existing_path), str(new_path)))
return ((existing_ctor == new_ctor) and (existing_path == new_path))
def common(retrieve, o_type, search_keys,
object_path, refresh, emit_signal, cache_refresh):
num_changes = 0
existing_paths = []
rc = []
if search_keys:
assert isinstance(search_keys, list)
if cache_refresh:
cfg.db.refresh()
objects = retrieve(search_keys, cache_refresh=False)
# If we are doing a refresh we need to know what we have in memory, what's
# in lvm and add those that are new and remove those that are gone!
if refresh:
existing_paths = cfg.om.object_paths_by_type(o_type)
for o in objects:
# Assume we need to add this one to dbus, unless we are refreshing,
# and it's already present
return_object = True
if refresh:
# We are refreshing all the PVs from LVM, if this one exists
# we need to refresh our state.
dbus_object = cfg.om.get_object_by_uuid_lvm_id(*o.identifiers())
if dbus_object:
del existing_paths[dbus_object.dbus_object_path()]
# If the old object state and new object state wouldn't be
# created with the same path and same object constructor we
# need to remove the old object and construct the new one
# instead!
if not _compare_construction(dbus_object.state, o):
# Remove existing and construct new one
cfg.om.remove_object(dbus_object, emit_signal)
dbus_object = o.create_dbus_object(None)
cfg.om.register_object(dbus_object, emit_signal)
num_changes += 1
else:
num_changes += dbus_object.refresh(object_state=o)
return_object = False
if return_object:
dbus_object = o.create_dbus_object(object_path)
cfg.om.register_object(dbus_object, emit_signal)
rc.append(dbus_object)
object_path = None
to_remove = []
if refresh:
to_remove = list(existing_paths.keys())
num_changes += len(rc)
return rc, num_changes, to_remove
|
