fa22662d2d
Fixed log translations for error, info and warning messages with appropriate marker function according to the standards [1]. As LOG.warn has deprecated [2] so I have changed LOG.warn to LOG.warning. [1] http://docs.openstack.org/developer/oslo.i18n/guidelines.html [2] http://bugs.python.org/issue13235 Change-Id: I876c6f3636d511664a25508649e08ad95c40007a Closes-Bug: 1431256
213 lines
8.0 KiB
Python
213 lines
8.0 KiB
Python
# (c) Copyright 2013 Hewlett-Packard Development Company, L.P.
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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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"""Generic linux Fibre Channel utilities."""
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import errno
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from oslo_concurrency import processutils as putils
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from os_brick.i18n import _LW
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from os_brick.initiator import linuxscsi
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from os_brick.openstack.common import log as logging
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LOG = logging.getLogger(__name__)
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class LinuxFibreChannel(linuxscsi.LinuxSCSI):
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def __init__(self, root_helper, execute=putils.execute,
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*args, **kwargs):
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super(LinuxFibreChannel, self).__init__(root_helper, execute,
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*args, **kwargs)
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def rescan_hosts(self, hbas):
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for hba in hbas:
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self.echo_scsi_command("/sys/class/scsi_host/%s/scan"
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% hba['host_device'], "- - -")
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def get_fc_hbas(self):
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"""Get the Fibre Channel HBA information."""
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out = None
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try:
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out, _err = self._execute('systool', '-c', 'fc_host', '-v',
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run_as_root=True,
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root_helper=self._root_helper)
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except putils.ProcessExecutionError as exc:
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# This handles the case where rootwrap is used
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# and systool is not installed
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# 96 = nova.cmd.rootwrap.RC_NOEXECFOUND:
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if exc.exit_code == 96:
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LOG.warning(_LW("systool is not installed"))
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return []
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except OSError as exc:
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# This handles the case where rootwrap is NOT used
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# and systool is not installed
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if exc.errno == errno.ENOENT:
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LOG.warning(_LW("systool is not installed"))
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return []
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# No FC HBAs were found
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if out is None:
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return []
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lines = out.split('\n')
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# ignore the first 2 lines
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lines = lines[2:]
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hbas = []
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hba = {}
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lastline = None
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for line in lines:
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line = line.strip()
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# 2 newlines denotes a new hba port
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if line == '' and lastline == '':
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if len(hba) > 0:
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hbas.append(hba)
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hba = {}
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else:
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val = line.split('=')
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if len(val) == 2:
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key = val[0].strip().replace(" ", "")
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value = val[1].strip()
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hba[key] = value.replace('"', '')
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lastline = line
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return hbas
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def get_fc_hbas_info(self):
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"""Get Fibre Channel WWNs and device paths from the system, if any."""
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# Note(walter-boring) modern Linux kernels contain the FC HBA's in /sys
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# and are obtainable via the systool app
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hbas = self.get_fc_hbas()
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if not hbas:
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return []
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hbas_info = []
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for hba in hbas:
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wwpn = hba['port_name'].replace('0x', '')
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wwnn = hba['node_name'].replace('0x', '')
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device_path = hba['ClassDevicepath']
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device = hba['ClassDevice']
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hbas_info.append({'port_name': wwpn,
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'node_name': wwnn,
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'host_device': device,
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'device_path': device_path})
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return hbas_info
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def get_fc_wwpns(self):
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"""Get Fibre Channel WWPNs from the system, if any."""
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# Note(walter-boring) modern Linux kernels contain the FC HBA's in /sys
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# and are obtainable via the systool app
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hbas = self.get_fc_hbas()
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wwpns = []
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if hbas:
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for hba in hbas:
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if hba['port_state'] == 'Online':
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wwpn = hba['port_name'].replace('0x', '')
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wwpns.append(wwpn)
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return wwpns
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def get_fc_wwnns(self):
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"""Get Fibre Channel WWNNs from the system, if any."""
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# Note(walter-boring) modern Linux kernels contain the FC HBA's in /sys
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# and are obtainable via the systool app
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hbas = self.get_fc_hbas()
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if not hbas:
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return []
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wwnns = []
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if hbas:
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for hba in hbas:
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if hba['port_state'] == 'Online':
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wwnn = hba['node_name'].replace('0x', '')
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wwnns.append(wwnn)
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return wwnns
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class LinuxFibreChannelS390X(LinuxFibreChannel):
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def __init__(self, root_helper, execute=putils.execute,
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*args, **kwargs):
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super(LinuxFibreChannelS390X, self).__init__(root_helper, execute,
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*args, **kwargs)
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def get_fc_hbas_info(self):
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"""Get Fibre Channel WWNs and device paths from the system, if any."""
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hbas = self.get_fc_hbas()
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if not hbas:
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return []
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hbas_info = []
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for hba in hbas:
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if hba['port_state'] == 'Online':
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wwpn = hba['port_name'].replace('0x', '')
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wwnn = hba['node_name'].replace('0x', '')
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device_path = hba['ClassDevicepath']
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device = hba['ClassDevice']
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hbas_info.append({'port_name': wwpn,
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'node_name': wwnn,
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'host_device': device,
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'device_path': device_path})
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return hbas_info
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def configure_scsi_device(self, device_number, target_wwn, lun):
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"""Write the LUN to the port's unit_add attribute.
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If auto-discovery of LUNs is disabled on s390 platforms
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luns need to be added to the configuration through the
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unit_add interface
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"""
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LOG.debug("Configure lun for s390: device_number=%(device_num)s "
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"target_wwn=%(target_wwn)s target_lun=%(target_lun)s",
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{'device_num': device_number,
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'target_wwn': target_wwn,
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'target_lun': lun})
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zfcp_device_command = ("/sys/bus/ccw/drivers/zfcp/%s/%s/unit_add" %
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(device_number, target_wwn))
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LOG.debug("unit_add call for s390 execute: %s", zfcp_device_command)
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try:
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self.echo_scsi_command(zfcp_device_command, lun)
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except putils.ProcessExecutionError as exc:
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LOG.warning(_LW("unit_add call for s390 failed exit %(code)s, "
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"stderr %(stderr)s"),
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{'code': exc.exit_code, 'stderr': exc.stderr})
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def deconfigure_scsi_device(self, device_number, target_wwn, lun):
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"""Write the LUN to the port's unit_remove attribute.
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If auto-discovery of LUNs is disabled on s390 platforms
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luns need to be removed from the configuration through the
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unit_remove interface
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"""
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LOG.debug("Deconfigure lun for s390: "
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"device_number=%(device_num)s "
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"target_wwn=%(target_wwn)s target_lun=%(target_lun)s",
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{'device_num': device_number,
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'target_wwn': target_wwn,
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'target_lun': lun})
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zfcp_device_command = ("/sys/bus/ccw/drivers/zfcp/%s/%s/unit_remove" %
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(device_number, target_wwn))
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LOG.debug("unit_remove call for s390 execute: %s", zfcp_device_command)
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try:
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self.echo_scsi_command(zfcp_device_command, lun)
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except putils.ProcessExecutionError as exc:
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LOG.warning(_LW("unit_remove call for s390 failed exit %(code)s, "
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"stderr %(stderr)s"),
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{'code': exc.exit_code, 'stderr': exc.stderr})
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