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# Storage Management Providers
#
# Copyright (C) 2013-2014 Red Hat, Inc. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
# The views and conclusions contained in the software and documentation are
# those of the authors and should not be interpreted as representing official
# policies, either expressed or implied, of the FreeBSD Project.
#
# Authors: Jan Safranek <jsafrane@redhat.com>
#
"""
MD RAID management functions.
"""
from lmi.scripts.common.errors import LmiFailed
from lmi.scripts.common import get_logger
LOG = get_logger(__name__)
from lmi.scripts.storage import common
def get_raids(ns):
"""
Retrieve list of all MD RAIDs on the system.
:rtype: list of LMIInstance/LMI_MDRAIDStorageExtent.
"""
for raid in ns.LMI_MDRAIDStorageExtent.instances():
yield raid
def create_raid(ns, devices, level, name=None):
"""
Create new MD RAID device.
:type devices: list of LMIInstance/CIM_StorageExtent or list of strings
:param device: Devices to add to the RAID.
:type level: int
:param level: RAID level.
:type name: string
:param name: RAID name.
:rtype: LMIInstance/LMI_MDRAIDStorageExtent
"""
devs = [common.str2device(ns, device) for device in devices]
args = { 'InExtents': devs,
'Level': level}
if name:
args['ElementName'] = name
service = ns.LMI_StorageConfigurationService.first_instance()
(ret, outparams, err) = service.SyncCreateOrModifyMDRAID(**args)
if ret != 0:
if err:
raise LmiFailed("Cannot create the MD RAID: %s." % err)
values = service.CreateOrModifyMDRAID.CreateOrModifyMDRAIDValues
raise LmiFailed("Cannot create the MD RAID: %s."
% (values.value_name(ret),))
return outparams['TheElement']
def delete_raid(ns, raid):
"""
Destroy given RAID device
:type raid: LMIInstance/LMI_MDRAIDStorageExtent
:param raid: MD RAID to destroy.
"""
raid = common.str2device(ns, raid)
service = ns.LMI_StorageConfigurationService.first_instance()
(ret, _outparams, err) = service.SyncDeleteMDRAID(TheElement=raid)
if ret != 0:
if err:
raise LmiFailed("Cannot delete the MD RAID: %s." % err)
raise LmiFailed("Cannot delete the raid: %s."
% (service.DeleteMDRAID.DeleteMDRAIDValues.value_name(ret),))
def get_raid_members(ns, raid):
"""
Return member devices of the RAID.
:type raid: LMIInstance/LMI_MDRAIDStorageExtent
:param raid: MD RAID to examine.
:rtype: List of LMIInstance/CIM_StorageExtent
"""
raid = common.str2device(ns, raid)
members = raid.associators(AssocClass="LMI_MDRAIDBasedOn",
Role="Dependent")
return members
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