def perform_unit_remove_for_s390(device_number, target_wwn, lun):
"""Write the LUN to the port's unit_remove attribute."""
# If LUN scanning is turned off on systems following the s390, or s390x
# architecture LUNs need to be removed from the configuration using the
# unit_remove call. The unit_remove call may fail if the LUN is not
# part of the configuration anymore. This may be an expected situation.
# For exmple, if LUN scanning is turned on.
# This method will thus only log a warning message in case the
# unit_remove call fails.
LOG.debug(
"perform unit_remove for s390: device_number=(%(device_num)s) "
"target_wwn=(%(target_wwn)s) target_lun=(%(target_lun)s)", {
'device_num': device_number,
'target_wwn': target_wwn,
'target_lun': lun
})
zfcp_device_command = ("/sys/bus/ccw/drivers/zfcp/%s/%s/unit_remove" %
(device_number, target_wwn))
try:
linuxscsi.echo_scsi_command(zfcp_device_command, lun)
except processutils.ProcessExecutionError as exc:
LOG.warn(
_LW("unit_remove call failed; exit code (%(code)s), "
"stderr (%(stderr)s)"), {
'code': exc.exit_code,
'stderr': exc.stderr
})
def perform_unit_add_for_s390(device_number, target_wwn, lun):
"""Write the LUN to the port's unit_add attribute."""
# NOTE If LUN scanning is turned off on systems following the s390,
# or s390x architecture LUNs need to be added to the configuration
# using the unit_add call. The unit_add call may fail if a target_wwn
# is not accessible for the HBA specified by the device_number.
# This can be an expected situation in multipath configurations.
# This method will thus only log a warning message in case the
# unit_add call fails.
LOG.debug(
"perform unit_add for s390: device_number=(%(device_num)s) "
"target_wwn=(%(target_wwn)s) target_lun=(%(target_lun)s)", {
'device_num': device_number,
'target_wwn': target_wwn,
'target_lun': lun
})
zfcp_device_command = ("/sys/bus/ccw/drivers/zfcp/%s/%s/unit_add" %
(device_number, target_wwn))
try:
linuxscsi.echo_scsi_command(zfcp_device_command, lun)
except processutils.ProcessExecutionError as exc:
LOG.warn(
_LW("unit_add call failed; exit code (%(code)s), "
"stderr (%(stderr)s)"), {
'code': exc.exit_code,
'stderr': exc.stderr
})
def perform_unit_remove_for_s390(device_number, target_wwn, lun):
"""Write the LUN to the port's unit_remove attribute."""
# If LUN scanning is turned off on systems following the s390, or s390x
# architecture LUNs need to be removed from the configuration using the
# unit_remove call. The unit_remove call may fail if the LUN is not
# part of the configuration anymore. This may be an expected situation.
# For exmple, if LUN scanning is turned on.
# This method will thus only log a warning message in case the
# unit_remove call fails.
LOG.debug("perform unit_remove for s390: device_number=(%(device_num)s) "
"target_wwn=(%(target_wwn)s) target_lun=(%(target_lun)s)",
{'device_num': device_number,
'target_wwn': target_wwn,
'target_lun': lun})
zfcp_device_command = ("/sys/bus/ccw/drivers/zfcp/%s/%s/unit_remove" %
(device_number, target_wwn))
try:
linuxscsi.echo_scsi_command(zfcp_device_command, lun)
except processutils.ProcessExecutionError as exc:
LOG.warn(_LW("unit_remove call failed; exit code (%(code)s), "
"stderr (%(stderr)s)"),
{'code': exc.exit_code, 'stderr': exc.stderr})
def perform_unit_add_for_s390(device_number, target_wwn, lun):
"""Write the LUN to the port's unit_add attribute."""
# NOTE If LUN scanning is turned off on systems following the s390,
# or s390x architecture LUNs need to be added to the configuration
# using the unit_add call. The unit_add call may fail if a target_wwn
# is not accessible for the HBA specified by the device_number.
# This can be an expected situation in multipath configurations.
# This method will thus only log a warning message in case the
# unit_add call fails.
LOG.debug("perform unit_add for s390: device_number=(%(device_num)s) "
"target_wwn=(%(target_wwn)s) target_lun=(%(target_lun)s)",
{'device_num': device_number,
'target_wwn': target_wwn,
'target_lun': lun})
zfcp_device_command = ("/sys/bus/ccw/drivers/zfcp/%s/%s/unit_add" %
(device_number, target_wwn))
try:
linuxscsi.echo_scsi_command(zfcp_device_command, lun)
except processutils.ProcessExecutionError as exc:
LOG.warn(_LW("unit_add call failed; exit code (%(code)s), "
"stderr (%(stderr)s)"),
{'code': exc.exit_code, 'stderr': exc.stderr})
