mirror of
git://sourceware.org/git/lvm2.git
synced 2024-12-22 17:35:59 +03:00
86 lines
2.6 KiB
Python
86 lines
2.6 KiB
Python
|
# 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
|
||
|
|
|
||
|
|
if refresh:
|
||
|
|
for k in list(existing_paths.keys()):
|
||
|
|
cfg.om.remove_object(cfg.om.get_object_by_path(k), True)
|
||
|
|
num_changes += 1
|
||
|
|
|
||
|
|
num_changes += len(rc)
|
||
|
|
|
||
|
|
return rc, num_changes
|