def _tpg_lun_of(tpg, pool_name, vol_name):
"""
Return a object of LUN for given lvm lv.
If not exist, create one.
"""
# get wwn of volume so LIO can export as vpd83 info
vg_name, thin_pool = get_vg_lv(pool_name)
vol_serial = bd.lvm.lvinfo(vg_name, vol_name).uuid
# only add new SO if it doesn't exist
# so.name concats pool & vol names separated by ':'
so_name = "%s:%s" % (vg_name, vol_name)
try:
so = BlockStorageObject(so_name)
except RTSLibError:
so = BlockStorageObject(
so_name, dev="/dev/%s/%s" % (vg_name, vol_name))
so.wwn = vol_serial
# export useful scsi model if kernel > 3.8
with ignored(RTSLibError):
so.set_attribute("emulate_model_alias", '1')
# only add tpg lun if it doesn't exist
for tmp_lun in tpg.luns:
if tmp_lun.storage_object.name == so.name and \
tmp_lun.storage_object.plugin == 'block':
return tmp_lun
else:
return LUN(tpg, storage_object=so)
def _tpg_lun_of(tpg, pool_name, vol_name):
"""
Return a object of LUN for given pool and volume.
If not exist, create one.
"""
mod = pool_module(pool_name)
# get wwn of volume so LIO can export as vpd83 info
vol_serial = mod.vol_info(pool_name, vol_name).uuid
# only add new SO if it doesn't exist
# so.name concats pool & vol names separated by ':'
so_name = mod.get_so_name(pool_name, vol_name)
try:
so = BlockStorageObject(so_name)
except RTSLibError:
so = BlockStorageObject(
so_name, dev=mod.get_dev_path(pool_name, vol_name))
so.wwn = vol_serial
# export useful scsi model if kernel > 3.8
with ignored(RTSLibError):
so.set_attribute("emulate_model_alias", '1')
# only add tpg lun if it doesn't exist
for tmp_lun in tpg.luns:
if tmp_lun.storage_object.name == so.name and \
tmp_lun.storage_object.plugin == 'block':
return tmp_lun
else:
return LUN(tpg, storage_object=so)
def create_lun(self, tpg, blockstore):
wwn = tpg.parent_target.wwn
lun_list = self.target[wwn]['tpg'][tpg.tag]['lun']
lun = lun_list.get(blockstore.name, None)
if lun is None:
Log.info('creating lun %s, blockstore %s' % (tpg, blockstore))
# Create the LUN
lun = LUN(tpg, 0, blockstore)
# Add it to the local data structure for tracking LUNs
lun_list[blockstore.name] = lun
else:
# LUN already exists
Log.info('lun %s already exists, not creating' % (blockstore.name))
return lun