def get_impl(datapath, loop, config):
try:
impl_type = QosImplType(config["qos"]["impl"])
except ValueError:
LOG.error("%s is not a valid qos impl type", impl_type)
raise
if impl_type == QosImplType.OVS_METER:
return MeterManager(datapath, loop, config)
else:
return TCManager(datapath, loop, config)
def init_impl(self, datapath):
"""
Takese in datapath, and initializes appropriate QoS manager based on config
"""
if not self._qos_enabled:
return
if self._initialized:
return
try:
impl_type = QosImplType(self._config["qos"]["impl"])
if impl_type == QosImplType.OVS_METER:
self.impl = MeterManager(datapath, self._loop, self._config)
else:
self.impl = TCManager(datapath, self._config)
self.setup()
except ValueError:
LOG.error("%s is not a valid qos impl type", impl_type)
raise
def getqos_impl(datapath, loop, config):
try:
qos_impl_type = QosImplType(config["qos"]["impl"])
except ValueError:
print("{} is not a valid qos implementation type({})".format(
qos_impl_type, QosImplType.list()))
raise
if qos_impl_type == QosImplType.OVS_METER:
return MeterManager(datapath, loop, config)
else:
return TCManager(datapath, loop, config)
class QosManager(object):
"""
Qos Manager -> add/remove subscriber qos
"""
def init_impl(self, datapath):
"""
Takese in datapath, and initializes appropriate QoS manager based on config
"""
if not self._qos_enabled:
return
if self._initialized:
return
try:
impl_type = QosImplType(self._config["qos"]["impl"])
if impl_type == QosImplType.OVS_METER:
self.impl = MeterManager(datapath, self._loop, self._config)
else:
self.impl = TCManager(datapath, self._config)
self.setup()
except ValueError:
LOG.error("%s is not a valid qos impl type", impl_type)
raise
@classmethod
def debug(cls, _, __, ___):
config = load_service_config('pipelined')
qos_impl_type = QosImplType(config["qos"]["impl"])
qos_store = QosStore(cls.__name__)
for k, v in qos_store.items():
_, imsi, ip_addr, rule_num, d = get_key(k)
_, qid, ambr, leaf = get_data(v)
print('imsi :', imsi)
print('ip_addr :', ip_addr)
print('rule_num :', rule_num)
print('direction :', d)
print('qos_handle:', qid)
print('qos_handle_ambr:', ambr)
print('qos_handle_ambr_leaf:', leaf)
if qos_impl_type == QosImplType.OVS_METER:
MeterManager.dump_meter_state(v)
else:
intf = 'nat_iface' if d == FlowMatch.UPLINK else 'enodeb_iface'
print("Dev: ", config[intf])
TrafficClass.dump_class_state(config[intf], qid)
if leaf and leaf != qid:
print("Leaf:")
TrafficClass.dump_class_state(config[intf], leaf)
if ambr:
print("AMBR (parent):")
TrafficClass.dump_class_state(config[intf], ambr)
if qos_impl_type == QosImplType.LINUX_TC:
dev = config['nat_iface']
print("Root stats for: ", dev)
TrafficClass.dump_root_class_stats(dev)
dev = config['enodeb_iface']
print("Root stats for: ", dev)
TrafficClass.dump_root_class_stats(dev)
def _is_redis_available(self):
try:
self._redis_store.client.ping()
except ConnectionError:
return False
return True
def __init__(self, loop, config, client=get_default_client()):
self._initialized = False
self._clean_restart = config["clean_restart"]
self._subscriber_state = {}
self._loop = loop
self._redis_conn_retry_secs = 1
self._config = config
# protect QoS object create and delete across a QoSManager Object.
self._lock = threading.Lock()
if 'qos' not in config.keys():
LOG.error("qos field not provided in config")
return
self._qos_enabled = config["qos"]["enable"]
if not self._qos_enabled:
return
self._apn_ambr_enabled = config["qos"].get("apn_ambr_enabled", True)
LOG.info("QoS: apn_ambr_enabled: %s", self._apn_ambr_enabled)
self._redis_store = QosStore(self.__class__.__name__, client)
self.impl = None
def setup(self):
with self._lock:
if not self._qos_enabled:
return
if self._is_redis_available():
self._setupInternal()
else:
LOG.info(
"failed to connect to redis..retrying in %d secs",
self._redis_conn_retry_secs,
)
self._loop.call_later(self._redis_conn_retry_secs, self.setup)
def _setupInternal(self):
if self._initialized:
return
if self._clean_restart:
LOG.info("Qos Setup: clean start")
self.impl.setup()
self.impl.destroy()
self._redis_store.clear()
self._initialized = True
else:
# read existing state from qos_impl
LOG.info("Qos Setup: recovering existing state")
self.impl.setup()
cur_qos_state, apn_qid_list = self.impl.read_all_state()
LOG.debug("Initial qos_state -> %s",
json.dumps(cur_qos_state, indent=1))
LOG.debug("apn_qid_list -> %s", apn_qid_list)
LOG.debug("Redis state: %s", self._redis_store)
try:
# populate state from db
in_store_qid = set()
in_store_ambr_qid = set()
purge_store_set = set()
for rule, sub_data in self._redis_store.items():
_, qid, ambr, leaf = get_data(sub_data)
if qid not in cur_qos_state:
LOG.warning("missing qid: %s in TC", qid)
purge_store_set.add(rule)
continue
if ambr and ambr != 0 and ambr not in cur_qos_state:
purge_store_set.add(rule)
LOG.warning("missing ambr class: %s of qid %d", ambr,
qid)
continue
if leaf and leaf != 0 and leaf not in cur_qos_state:
purge_store_set.add(rule)
LOG.warning("missing leaf class: %s of qid %d", leaf,
qid)
continue
if ambr:
qid_state = cur_qos_state[qid]
if qid_state['ambr_qid'] != ambr:
purge_store_set.add(rule)
LOG.warning(
"Inconsistent amber class: %s of qid %d",
qid_state['ambr_qid'], ambr)
continue
in_store_qid.add(qid)
if ambr:
in_store_qid.add(ambr)
in_store_ambr_qid.add(ambr)
in_store_qid.add(leaf)
_, imsi, ip_addr, rule_num, direction = get_key(rule)
subscriber = self._get_or_create_subscriber(imsi)
subscriber.update_rule(ip_addr, rule_num, direction, qid,
ambr, leaf)
session = subscriber.get_or_create_session(ip_addr)
session.set_ambr(direction, ambr, leaf)
# purge entries from qos_store
for rule in purge_store_set:
LOG.debug("purging qos_store entry %s", rule)
del self._redis_store[rule]
# purge unreferenced qos configs from system
# Step 1. Delete child nodes
lost_and_found_apn_list = set()
for qos_handle in cur_qos_state:
if qos_handle not in in_store_qid:
if qos_handle in apn_qid_list:
lost_and_found_apn_list.add(qos_handle)
else:
LOG.debug("removing qos_handle %d", qos_handle)
self.impl.remove_qos(
qos_handle,
cur_qos_state[qos_handle]['direction'],
recovery_mode=True,
)
if len(lost_and_found_apn_list) > 0:
# Step 2. delete qos ambr without any leaf nodes
for qos_handle in lost_and_found_apn_list:
if qos_handle not in in_store_ambr_qid:
LOG.debug("removing apn qos_handle %d", qos_handle)
self.impl.remove_qos(
qos_handle,
cur_qos_state[qos_handle]['direction'],
recovery_mode=True,
skip_filter=True,
)
final_qos_state, _ = self.impl.read_all_state()
LOG.info("final_qos_state -> %s",
json.dumps(final_qos_state, indent=1))
LOG.info("final_redis state -> %s", self._redis_store)
except Exception as e: # pylint: disable=broad-except
# in case of any exception start clean slate
LOG.error("error %s. restarting clean %s", e,
traceback.format_exc())
self._clean_restart = True
self._initialized = True
def _get_or_create_subscriber(self, imsi):
subscriber_state = self._subscriber_state.get(imsi)
if not subscriber_state:
subscriber_state = SubscriberState(imsi, self._redis_store)
self._subscriber_state[imsi] = subscriber_state
return subscriber_state
def add_subscriber_qos(
self,
imsi: str,
ip_addr: str,
apn_ambr: int,
rule_num: int,
direction: FlowMatch.Direction,
qos_info: QosInfo,
cleanup_rule=None,
):
with self._lock:
if not self._qos_enabled or not self._initialized:
LOG.debug("add_subscriber_qos: not enabled or initialized")
return None, None, None
LOG.debug(
"adding qos for imsi %s rule_num %d direction %d apn_ambr %d, %s",
imsi,
rule_num,
direction,
apn_ambr,
qos_info,
)
imsi = normalize_imsi(imsi)
# ip_addr identifies a specific subscriber session, each subscriber session
# must be associated with a default bearer and can be associated with dedicated
# bearers. APN AMBR specifies the aggregate max bit rate for a specific
# subscriber across all the bearers. Queues for dedicated bearers will be
# children of default bearer Queues. In case the dedicated bearers exceed the
# rate, then they borrow from the default bearer queue
subscriber_state = self._get_or_create_subscriber(imsi)
qos_handle = subscriber_state.get_qos_handle(rule_num, direction)
if qos_handle:
LOG.debug(
"qos exists for imsi %s rule_num %d direction %d",
imsi,
rule_num,
direction,
)
return self.impl.get_action_instruction(qos_handle)
ambr_qos_handle_root = 0
ambr_qos_handle_leaf = 0
if self._apn_ambr_enabled and apn_ambr > 0:
session = subscriber_state.get_or_create_session(ip_addr)
ambr_qos_handle_root = session.get_ambr(direction)
LOG.debug("existing root rec: ambr_qos_handle_root %d",
ambr_qos_handle_root)
if not ambr_qos_handle_root:
ambr_qos_handle_root = self.impl.add_qos(
direction,
QosInfo(gbr=None, mbr=apn_ambr),
cleanup_rule,
skip_filter=True,
)
if not ambr_qos_handle_root:
LOG.error(
'Failed adding root ambr qos mbr %u direction %d',
apn_ambr,
direction,
)
return None, None, None
else:
LOG.debug(
'Added root ambr qos mbr %u direction %d qos_handle %d ',
apn_ambr,
direction,
ambr_qos_handle_root,
)
ambr_qos_handle_leaf = session.get_ambr_leaf(direction)
LOG.debug("existing leaf rec: ambr_qos_handle_leaf %d",
ambr_qos_handle_leaf)
if not ambr_qos_handle_leaf:
ambr_qos_handle_leaf = self.impl.add_qos(
direction,
QosInfo(gbr=None, mbr=apn_ambr),
cleanup_rule,
parent=ambr_qos_handle_root,
)
if ambr_qos_handle_leaf:
session.set_ambr(direction, ambr_qos_handle_root,
ambr_qos_handle_leaf)
LOG.debug(
'Added ambr qos mbr %u direction %d qos_handle %d/%d ',
apn_ambr,
direction,
ambr_qos_handle_root,
ambr_qos_handle_leaf,
)
else:
LOG.error(
'Failed adding leaf ambr qos mbr %u direction %d',
apn_ambr,
direction,
)
self.impl.remove_qos(ambr_qos_handle_root,
direction,
skip_filter=True)
return None, None, None
qos_handle = ambr_qos_handle_leaf
if qos_info:
qos_handle = self.impl.add_qos(
direction,
qos_info,
cleanup_rule,
parent=ambr_qos_handle_root,
)
LOG.debug("Added ded brr handle: %d", qos_handle)
if qos_handle:
LOG.debug(
'Adding qos %s direction %d qos_handle %d ',
qos_info,
direction,
qos_handle,
)
else:
LOG.error('Failed adding qos %s direction %d', qos_info,
direction)
return None, None, None
if qos_handle:
subscriber_state.update_rule(
ip_addr,
rule_num,
direction,
qos_handle,
ambr_qos_handle_root,
ambr_qos_handle_leaf,
)
return self.impl.get_action_instruction(qos_handle)
return None, None, None
def remove_subscriber_qos(self, imsi: str = "", del_rule_num: int = -1):
with self._lock:
if not self._qos_enabled or not self._initialized:
LOG.debug("remove_subscriber_qos: not enabled or initialized")
return
LOG.debug("removing Qos for imsi %s del_rule_num %d", imsi,
del_rule_num)
if not imsi:
LOG.error('imsi %s invalid, failed removing', imsi)
return
imsi = normalize_imsi(imsi)
subscriber_state = self._subscriber_state.get(imsi)
if not subscriber_state:
LOG.debug('imsi %s not found, nothing to remove ', imsi)
return
to_be_deleted_rules = set()
qid_to_remove = {}
qid_in_use = set()
if del_rule_num == -1:
# deleting all rules for the subscriber
rules = subscriber_state.get_all_rules()
for (rule_num, rule) in rules.items():
for (d, qos_data) in rule:
_, qid, ambr, leaf = get_data(qos_data)
if ambr != qid:
qid_to_remove[qid] = d
if leaf and leaf != qid:
qid_to_remove[leaf] = d
to_be_deleted_rules.add(rule_num)
else:
rule = subscriber_state.find_rule(del_rule_num)
if rule:
rules = subscriber_state.get_all_rules()
for (rule_num, rule) in rules.items():
for (d, qos_data) in rule:
_, qid, ambr, leaf = get_data(qos_data)
if rule_num == del_rule_num:
if ambr != qid:
qid_to_remove[qid] = d
if leaf and leaf != qid:
qid_to_remove[leaf] = d
else:
qid_in_use.add(qid)
LOG.debug("removing rule %s %s ", imsi, del_rule_num)
to_be_deleted_rules.add(del_rule_num)
else:
LOG.debug("unable to find rule_num %d for imsi %s",
del_rule_num, imsi)
for (qid, d) in qid_to_remove.items():
if qid not in qid_in_use:
self.impl.remove_qos(qid, d)
for rule_num in to_be_deleted_rules:
subscriber_state.remove_rule(rule_num)
# purge sessions with no rules
for session in subscriber_state.get_all_empty_sessions():
for d in (FlowMatch.UPLINK, FlowMatch.DOWNLINK):
ambr_qos_handle = session.get_ambr(d)
if ambr_qos_handle:
LOG.debug(
"removing root ambr qos handle %d direction %d",
ambr_qos_handle, d)
self.impl.remove_qos(ambr_qos_handle,
d,
skip_filter=True)
LOG.debug("purging session %s %s ", imsi, session.ip_addr)
subscriber_state.remove_session(session.ip_addr)
# purge subscriber state with no rules
if subscriber_state.check_empty():
LOG.debug(
"purging subscriber state for %s, empty rules and sessions",
imsi)
del self._subscriber_state[imsi]
