100 lines
3.9 KiB
Python
100 lines
3.9 KiB
Python
# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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from oslo_log import log as logging
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from os_brick import initiator
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from os_brick.initiator.connectors import fibre_channel
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from os_brick.initiator import linuxfc
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LOG = logging.getLogger(__name__)
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class FibreChannelConnectorS390X(fibre_channel.FibreChannelConnector):
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"""Connector class to attach/detach Fibre Channel volumes on S390X arch."""
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platform = initiator.PLATFORM_S390
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def __init__(self, root_helper, driver=None,
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execute=None, use_multipath=False,
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device_scan_attempts=initiator.DEVICE_SCAN_ATTEMPTS_DEFAULT,
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*args, **kwargs):
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super(FibreChannelConnectorS390X, self).__init__(
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root_helper,
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driver=driver,
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execute=execute,
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device_scan_attempts=device_scan_attempts,
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*args, **kwargs)
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LOG.debug("Initializing Fibre Channel connector for S390")
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self._linuxfc = linuxfc.LinuxFibreChannelS390X(root_helper, execute)
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self.use_multipath = use_multipath
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def set_execute(self, execute):
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super(FibreChannelConnectorS390X, self).set_execute(execute)
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self._linuxscsi.set_execute(execute)
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self._linuxfc.set_execute(execute)
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def _get_host_devices(self, possible_devs, lun):
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host_devices = []
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for pci_num, target_wwn in possible_devs:
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host_device = self._get_device_file_path(
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pci_num,
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target_wwn,
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lun)
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# NOTE(arne_r)
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# LUN driver path is the same on all distros, so no need to have
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# multiple calls here
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self._linuxfc.configure_scsi_device(pci_num, target_wwn,
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self._get_lun_string(lun))
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host_devices.extend(host_device)
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return host_devices
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def _get_lun_string(self, lun):
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target_lun = 0
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if lun <= 0xffff:
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target_lun = "0x%04x000000000000" % lun
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elif lun <= 0xffffffff:
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target_lun = "0x%08x00000000" % lun
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return target_lun
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def _get_device_file_path(self, pci_num, target_wwn, lun):
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# NOTE(arne_r)
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# Need to add multiple possible ways to resolve device paths,
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# depending on OS. Since it gets passed to '_get_possible_volume_paths'
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# having a mismatch is not a problem
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host_device = [
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# RHEL based
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"/dev/disk/by-path/ccw-%s-zfcp-%s:%s" % (
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pci_num, target_wwn, self._get_lun_string(lun)),
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# Debian based (e.g. for storwize)
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"/dev/disk/by-path/ccw-%s-fc-%s-lun-%s" % (
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pci_num, target_wwn, lun),
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# Debian based (e.g. for ds8k)
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"/dev/disk/by-path/ccw-%s-fc-%s-lun-%s" % (
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pci_num, target_wwn, self._get_lun_string(lun)),
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]
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return host_device
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def _remove_devices(self, connection_properties, devices, device_info):
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hbas = self._linuxfc.get_fc_hbas_info()
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ports = connection_properties['target_wwn']
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possible_devs = self._get_possible_devices(hbas, ports)
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lun = connection_properties.get('target_lun', 0)
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target_lun = self._get_lun_string(lun)
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for pci_num, target_wwn in possible_devs:
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self._linuxfc.deconfigure_scsi_device(pci_num,
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target_wwn,
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target_lun)
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