def __init__(self, storage_obj, name, tag=None):
"""
@param storage_obj: backstore storage object to create ALUA group for
@param name: name of ALUA group
@param tag: target port group id. If not passed in, try to look
up existing ALUA TPG with the same name
"""
# default_tg_pt_gp takes tag 1
if tag is not None and (tag > 65535 or tag < 1):
raise RTSLibError("The TPG Tag must be between 1 and 65535")
super(ALUATargetPortGroup, self).__init__()
self.name = name
self.storage_obj = storage_obj
self._path = "%s/alua/%s" % (storage_obj.path, name)
if tag is not None:
try:
self._create_in_cfs_ine('create')
except OSError as msg:
raise RTSLibError(msg)
try:
fwrite("%s/tg_pt_gp_id" % self._path, tag)
except IOError as msg:
self.delete()
raise RTSLibError("Cannot set id to %d: %s" % (tag, str(msg)))
else:
try:
self._create_in_cfs_ine('lookup')
except OSError as msg:
raise RTSLibError(msg)
def _set_alua_access_type(self, access_type):
self._check_self()
path = "%s/alua_access_type" % self.path
try:
fwrite(path, str(int(access_type)))
except IOError as e:
raise RTSLibError("Cannot change ALUA access type: %s" % e)
def _set_alua_access_state(self, newstate):
self._check_self()
path = "%s/alua_access_state" % self.path
try:
fwrite(path, str(int(newstate)))
except IOError as e:
raise RTSLibError("Cannot change ALUA state: %s" % e)
def _set_nonop_delay_msecs(self, delay):
self._check_self()
path = "%s/nonop_delay_msecs" % self.path
try:
fwrite(path, str(int(delay)))
except IOError as e:
raise RTSLibError("Cannot set nonop_delay_msecs: %s" % e)
def _set_alua_support_standby(self, enabled):
self._check_self()
path = "%s/alua_support_standby" % self.path
try:
fwrite(path, str(int(enabled)))
except IOError as e:
raise RTSLibError("Cannot set alua_support_standby: %s" % e)
def _set_preferred(self, pref):
self._check_self()
path = "%s/preferred" % self.path
try:
fwrite(path, str(int(pref)))
except IOError as e:
raise RTSLibError("Cannot set preferred: %s" % e)
def _set_alua_support_active_optimized(self, enabled):
self._check_self()
path = "%s/alua_support_active_optimized" % self.path
try:
fwrite(path, str(int(enabled)))
except IOError as e:
raise RTSLibError("Cannot set alua_support_active_optimized: %s" %
e)
def delete(self, config):
saved_err = None
if self.target is None:
self.load_config()
# Ignore errors. Target was probably not setup. Try to clean up
# disks.
if self.target:
try:
self.target.delete()
except RTSLibError as err:
self.logger.error("lio target deletion failed {}".format(err))
saved_err = err
# drop down and try to delete disks
for disk in config.config['targets'][self.iqn]['disks']:
so = lookup_storage_object_by_disk(config, disk)
if so is None:
self.logger.debug("lio disk lookup failed {}")
# SO may not have got setup. Ignore.
continue
if so.status == 'activated':
# Still mapped so ignore.
continue
try:
so.delete()
except RTSLibError as err:
self.logger.error("lio disk deletion failed {}".format(err))
if saved_err is None:
saved_err = err
# Try the other disks.
if saved_err:
raise RTSLibError(saved_err)
def bind_to_lun(self, mapped_lun):
path = "%s/alua_tg_pt_gp" % mapped_lun.path
try:
fwrite(path, str(self.name))
except IOError as msg:
raise RTSLibError("Cannot set tpg: " % str(msg))