def clear_flows_and_scheduler_for_logical_port(self, child_device,
logical_port):
ofp_port_name = logical_port.ofp_port.name
port_no = logical_port.ofp_port.port_no
pon_port = child_device.proxy_address.channel_id
onu_id = child_device.proxy_address.onu_id
uni_id = self.platform.uni_id_from_port_num(port_no)
# TODO: The DEFAULT_TECH_PROFILE_ID is assumed. Right way to do,
# is probably to maintain a list of Tech-profile table IDs associated
# with the UNI logical_port. This way, when the logical port is
# deleted, all the associated tech-profile configuration with the UNI
# logical_port can be cleared.
tp_id = self.resource_mgr.get_tech_profile_id_for_onu(pon_port, onu_id,
uni_id)
tech_profile_instance = self.tech_profile[pon_port]. \
get_tech_profile_instance(
tp_id,
ofp_port_name)
flow_ids = self.resource_mgr.get_current_flow_ids(pon_port, onu_id,
uni_id)
self.log.debug("outstanding-flows-to-be-cleared", flow_ids=flow_ids)
for flow_id in flow_ids:
flow_infos = self.resource_mgr.get_flow_id_info(pon_port, onu_id,
uni_id, flow_id)
for flow_info in flow_infos:
direction = flow_info['flow_type']
flow_to_remove = openolt_pb2.Flow(flow_id=flow_id,
flow_type=direction)
try:
self.stub.FlowRemove(flow_to_remove)
except grpc.RpcError as grpc_e:
if grpc_e.code() == grpc.StatusCode.NOT_FOUND:
self.log.debug('This flow does not exist on switch, '
'normal after an OLT reboot',
flow=flow_to_remove)
else:
raise grpc_e
self.resource_mgr.free_flow_id(pon_port, onu_id, uni_id,
flow_id)
try:
tconts = self.tech_profile[pon_port].get_tconts(
tech_profile_instance)
self.stub.RemoveTconts(openolt_pb2.Tconts(intf_id=pon_port,
onu_id=onu_id,
uni_id=uni_id,
port_no=port_no,
tconts=tconts))
except grpc.RpcError as grpc_e:
self.log.error('error-removing-tcont-scheduler-queues',
err=grpc_e)
def add_lldp_flow(self, logical_flow, port_no, network_intf_id=0):
classifier = dict()
classifier[ETH_TYPE] = LLDP_ETH_TYPE
classifier[PACKET_TAG_TYPE] = UNTAGGED
action = dict()
action[TRAP_TO_HOST] = True
# LLDP flow is installed to trap LLDP packets on the NNI port.
# We manage flow_id resource pool on per PON port basis.
# Since this situation is tricky, as a hack, we pass the NNI port
# index (network_intf_id) as PON port Index for the flow_id resource
# pool. Also, there is no ONU Id available for trapping LLDP packets
# on NNI port, use onu_id as -1 (invalid)
# ****************** CAVEAT *******************
# This logic works if the NNI Port Id falls within the same valid
# range of PON Port Ids. If this doesn't work for some OLT Vendor
# we need to have a re-look at this.
# *********************************************
onu_id = -1
uni_id = -1
flow_store_cookie = self._get_flow_store_cookie(classifier)
if self.resource_mgr.is_flow_cookie_on_kv_store(
network_intf_id, onu_id, uni_id, flow_store_cookie):
self.log.debug('flow-exists--not-re-adding')
else:
flow_id = self.resource_mgr.get_flow_id(
network_intf_id, onu_id, uni_id, flow_store_cookie)
downstream_flow = openolt_pb2.Flow(
access_intf_id=-1, # access_intf_id not required
onu_id=onu_id, # onu_id not required
uni_id=uni_id, # uni_id not used
flow_id=flow_id,
flow_type=DOWNSTREAM,
network_intf_id=network_intf_id,
gemport_id=-1, # gemport_id not required
classifier=self.mk_classifier(classifier),
action=self.mk_action(action),
priority=logical_flow.priority,
port_no=port_no,
cookie=logical_flow.cookie)
self.log.debug('add lldp downstream trap', classifier=classifier,
action=action, flow=downstream_flow,
port_no=port_no)
if self.add_flow_to_device(downstream_flow, logical_flow):
flow_info = self._get_flow_info_as_json_blob(downstream_flow,
flow_store_cookie)
self.update_flow_info_to_kv_store(
network_intf_id, onu_id, uni_id, flow_id, flow_info)
def remove_flow(self, flow):
self.log.debug('trying to remove flows from logical flow :',
logical_flow=flow)
device_flows_to_remove = []
device_flows = self.flows_proxy.get('/').items
for f in device_flows:
if f.cookie == flow.id:
device_flows_to_remove.append(f)
for f in device_flows_to_remove:
(id, direction) = self.decode_stored_id(f.id)
flow_to_remove = openolt_pb2.Flow(flow_id=id, flow_type=direction)
try:
self.stub.FlowRemove(flow_to_remove)
except grpc.RpcError as grpc_e:
if grpc_e.code() == grpc.StatusCode.NOT_FOUND:
self.log.debug('This flow does not exist on the switch, '
'normal after an OLT reboot',
flow=flow_to_remove)
else:
raise grpc_e
# once we have successfully deleted the flow on the device
# release the flow_id on resource pool and also clear any
# data associated with the flow_id on KV store.
self._clear_flow_id_from_rm(f, id, direction)
self.log.debug('flow removed from device', flow=f,
flow_key=flow_to_remove)
if len(device_flows_to_remove) > 0:
new_flows = []
flows_ids_to_remove = [f.id for f in device_flows_to_remove]
for f in device_flows:
if f.id not in flows_ids_to_remove:
new_flows.append(f)
self.flows_proxy.update('/', Flows(items=new_flows))
self.log.debug('flows removed from the data store',
flow_ids_removed=flows_ids_to_remove,
number_of_flows_removed=(len(device_flows) - len(
new_flows)), expected_flows_removed=len(
device_flows_to_remove))
else:
self.log.debug('no device flow to remove for this flow (normal '
'for multi table flows)', flow=flow)
def add_dhcp_trap(self, intf_id, onu_id, uni_id, port_no, classifier,
action, logical_flow, alloc_id, gemport_id):
self.log.debug('add dhcp upstream trap', classifier=classifier,
intf_id=intf_id, onu_id=onu_id, uni_id=uni_id,
action=action)
action.clear()
action[TRAP_TO_HOST] = True
classifier[UDP_SRC] = 68
classifier[UDP_DST] = 67
classifier[PACKET_TAG_TYPE] = SINGLE_TAG
classifier.pop(VLAN_VID, None)
flow_store_cookie = self._get_flow_store_cookie(classifier,
gemport_id)
if self.resource_mgr.is_flow_cookie_on_kv_store(intf_id, onu_id,
uni_id,
flow_store_cookie):
self.log.debug('flow-exists--not-re-adding')
else:
flow_id = self.resource_mgr.get_flow_id(
intf_id, onu_id, uni_id, flow_store_cookie
)
dhcp_flow = openolt_pb2.Flow(
onu_id=onu_id, uni_id=uni_id, flow_id=flow_id,
flow_type=UPSTREAM, access_intf_id=intf_id,
gemport_id=gemport_id, alloc_id=alloc_id,
network_intf_id=self.data_model.olt_nni_intf_id(),
priority=logical_flow.priority,
classifier=self.mk_classifier(classifier),
action=self.mk_action(action),
port_no=port_no,
cookie=logical_flow.cookie)
if self.add_flow_to_device(dhcp_flow, logical_flow):
flow_info = self._get_flow_info_as_json_blob(dhcp_flow,
flow_store_cookie)
self.update_flow_info_to_kv_store(dhcp_flow.access_intf_id,
dhcp_flow.onu_id,
dhcp_flow.uni_id,
dhcp_flow.flow_id,
flow_info)
def add_hsia_flow(self, intf_id, onu_id, uni_id, port_no, classifier,
action, direction, logical_flow, alloc_id, gemport_id):
flow_store_cookie = self._get_flow_store_cookie(classifier,
gemport_id)
if self.resource_mgr.is_flow_cookie_on_kv_store(intf_id, onu_id,
uni_id,
flow_store_cookie):
self.log.debug('flow-exists--not-re-adding')
else:
# One of the OLT platform (Broadcom BAL) requires that symmetric
# flows require the same flow_id to be used across UL and DL.
# Since HSIA flow is the only symmetric flow currently, we need to
# re-use the flow_id across both direction. The 'flow_category'
# takes priority over flow_cookie to find any available HSIA_FLOW
# id for the ONU.
flow_id = self.resource_mgr.get_flow_id(intf_id, onu_id, uni_id,
flow_store_cookie,
HSIA_FLOW)
if flow_id is None:
self.log.error("hsia-flow-unavailable")
return
flow = openolt_pb2.Flow(
access_intf_id=intf_id, onu_id=onu_id, uni_id=uni_id,
flow_id=flow_id, flow_type=direction, alloc_id=alloc_id,
network_intf_id=self.data_model.olt_nni_intf_id(),
gemport_id=gemport_id,
classifier=self.mk_classifier(classifier),
action=self.mk_action(action), priority=logical_flow.priority,
port_no=port_no, cookie=logical_flow.cookie)
if self.add_flow_to_device(flow, logical_flow):
flow_info = self._get_flow_info_as_json_blob(flow,
flow_store_cookie,
HSIA_FLOW)
self.update_flow_info_to_kv_store(flow.access_intf_id,
flow.onu_id, flow.uni_id,
flow.flow_id, flow_info)
def add_eapol_flow(self, intf_id, onu_id, uni_id, port_no, logical_flow,
alloc_id, gemport_id, vlan_id=DEFAULT_MGMT_VLAN):
uplink_classifier = dict()
uplink_classifier[ETH_TYPE] = EAP_ETH_TYPE
uplink_classifier[PACKET_TAG_TYPE] = SINGLE_TAG
uplink_classifier[VLAN_VID] = vlan_id
uplink_action = dict()
uplink_action[TRAP_TO_HOST] = True
flow_store_cookie = self._get_flow_store_cookie(uplink_classifier,
gemport_id)
if self.resource_mgr.is_flow_cookie_on_kv_store(intf_id, onu_id,
uni_id,
flow_store_cookie):
self.log.debug('flow-exists--not-re-adding')
else:
# Add Upstream EAPOL Flow.
uplink_flow_id = self.resource_mgr.get_flow_id(
intf_id, onu_id, uni_id, flow_store_cookie
)
upstream_flow = openolt_pb2.Flow(
access_intf_id=intf_id, onu_id=onu_id, uni_id=uni_id,
flow_id=uplink_flow_id, flow_type=UPSTREAM, alloc_id=alloc_id,
network_intf_id=self.data_model.olt_nni_intf_id(),
gemport_id=gemport_id,
classifier=self.mk_classifier(uplink_classifier),
action=self.mk_action(uplink_action),
priority=logical_flow.priority,
port_no=port_no,
cookie=logical_flow.cookie)
logical_flow = copy.deepcopy(logical_flow)
logical_flow.match.oxm_fields.extend(fd.mk_oxm_fields([fd.vlan_vid(
vlan_id | 0x1000)]))
logical_flow.match.type = OFPMT_OXM
if self.add_flow_to_device(upstream_flow, logical_flow):
flow_info = self._get_flow_info_as_json_blob(upstream_flow,
flow_store_cookie)
self.update_flow_info_to_kv_store(upstream_flow.access_intf_id,
upstream_flow.onu_id,
upstream_flow.uni_id,
upstream_flow.flow_id,
flow_info)
if vlan_id == DEFAULT_MGMT_VLAN:
# Add Downstream EAPOL Flow, Only for first EAP flow (BAL
# requirement)
# On one of the platforms (Broadcom BAL), when same DL classifier
# vlan was used across multiple ONUs, eapol flow re-adds after
# flow delete (cases of onu reboot/disable) fails.
# In order to generate unique vlan, a combination of intf_id
# onu_id and uni_id is used.
# uni_id defaults to 0, so add 1 to it.
special_vlan_downstream_flow = 4090 - intf_id * onu_id * (uni_id+1)
# Assert that we do not generate invalid vlans under no condition
assert special_vlan_downstream_flow >= 2
downlink_classifier = dict()
downlink_classifier[PACKET_TAG_TYPE] = SINGLE_TAG
downlink_classifier[VLAN_VID] = special_vlan_downstream_flow
downlink_action = dict()
downlink_action[PUSH_VLAN] = True
downlink_action[VLAN_VID] = vlan_id
flow_store_cookie = self._get_flow_store_cookie(
downlink_classifier, gemport_id)
if self.resource_mgr.is_flow_cookie_on_kv_store(
intf_id, onu_id, uni_id, flow_store_cookie):
self.log.debug('flow-exists--not-re-adding')
else:
downlink_flow_id = self.resource_mgr.get_flow_id(
intf_id, onu_id, uni_id, flow_store_cookie
)
downstream_flow = openolt_pb2.Flow(
access_intf_id=intf_id, onu_id=onu_id, uni_id=uni_id,
flow_id=downlink_flow_id, flow_type=DOWNSTREAM,
alloc_id=alloc_id,
network_intf_id=self.data_model.olt_nni_intf_id(),
gemport_id=gemport_id,
classifier=self.mk_classifier(downlink_classifier),
action=self.mk_action(downlink_action),
priority=logical_flow.priority,
port_no=port_no,
cookie=logical_flow.cookie)
downstream_logical_flow = ofp_flow_stats(
id=logical_flow.id, cookie=logical_flow.cookie,
table_id=logical_flow.table_id,
priority=logical_flow.priority, flags=logical_flow.flags)
downstream_logical_flow.match.oxm_fields.extend(
fd.mk_oxm_fields(
[fd.in_port(fd.get_out_port(logical_flow)),
fd.vlan_vid(special_vlan_downstream_flow | 0x1000)]))
downstream_logical_flow.match.type = OFPMT_OXM
downstream_logical_flow.instructions.extend(
fd.mk_instructions_from_actions([fd.output(
self.platform.mk_uni_port_num(intf_id, onu_id,
uni_id))]))
if self.add_flow_to_device(downstream_flow,
downstream_logical_flow):
flow_info = self._get_flow_info_as_json_blob(
downstream_flow, flow_store_cookie)
self.update_flow_info_to_kv_store(
downstream_flow.access_intf_id, downstream_flow.onu_id,
downstream_flow.uni_id, downstream_flow.flow_id,
flow_info)