blob: 1150d9a9fd38181262d9811a506f51d767c6eb4f [file] [log] [blame]
#
# Copyright 2018 the original author or authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
import copy
from twisted.internet import reactor
import grpc
from google.protobuf.json_format import MessageToDict
import hashlib
from simplejson import dumps
from voltha.protos.openflow_13_pb2 import OFPXMC_OPENFLOW_BASIC, \
ofp_flow_stats, OFPMT_OXM, Flows, FlowGroups, \
OFPXMT_OFB_VLAN_VID
from voltha.protos.device_pb2 import Port
import voltha.core.flow_decomposer as fd
from voltha.adapters.openolt.protos import openolt_pb2
from voltha.registry import registry
from common.tech_profile.tech_profile import DEFAULT_TECH_PROFILE_TABLE_ID
# Flow categories
HSIA_FLOW = "HSIA_FLOW"
EAP_ETH_TYPE = 0x888e
LLDP_ETH_TYPE = 0x88cc
IGMP_PROTO = 2
# FIXME - see also BRDCM_DEFAULT_VLAN in broadcom_onu.py
DEFAULT_MGMT_VLAN = 4091
RESERVED_VLAN = 4095
# Openolt Flow
UPSTREAM = "upstream"
DOWNSTREAM = "downstream"
PACKET_TAG_TYPE = "pkt_tag_type"
UNTAGGED = "untagged"
SINGLE_TAG = "single_tag"
DOUBLE_TAG = "double_tag"
# Classifier
ETH_TYPE = 'eth_type'
TPID = 'tpid'
IP_PROTO = 'ip_proto'
IN_PORT = 'in_port'
VLAN_VID = 'vlan_vid'
VLAN_PCP = 'vlan_pcp'
UDP_DST = 'udp_dst'
UDP_SRC = 'udp_src'
IPV4_DST = 'ipv4_dst'
IPV4_SRC = 'ipv4_src'
METADATA = 'metadata'
OUTPUT = 'output'
# Action
POP_VLAN = 'pop_vlan'
PUSH_VLAN = 'push_vlan'
TRAP_TO_HOST = 'trap_to_host'
class OpenOltFlowMgr(object):
def __init__(self, log, stub, device_id, logical_device_id,
platform, resource_mgr, data_model):
self.data_model = data_model
self.log = log
self.stub = stub
self.device_id = device_id
self.logical_device_id = logical_device_id
self.platform = platform
self.logical_flows_proxy = registry('core').get_proxy(
'/logical_devices/{}/flows'.format(self.logical_device_id))
self.flows_proxy = registry('core').get_proxy(
'/devices/{}/flows'.format(self.device_id))
self.root_proxy = registry('core').get_proxy('/')
self.resource_mgr = resource_mgr
self.tech_profile = dict()
self._populate_tech_profile_per_pon_port()
self.retry_add_flow_list = []
def update_logical_flows(self, flows_to_add, flows_to_remove,
device_rules_map):
try:
self.update_children_flows(device_rules_map)
except Exception as e:
self.log.error('Error updating children flows', error=e)
self.log.debug('logical flows update', flows_to_add=flows_to_add,
flows_to_remove=flows_to_remove)
for flow in flows_to_add:
try:
self.add_flow(flow)
except Exception as e:
self.log.error('failed to add flow', flow=flow, e=e)
for flow in flows_to_remove:
try:
self.remove_flow(flow)
except Exception as e:
self.log.error('failed to remove flow', flow=flow, e=e)
self.repush_all_different_flows()
def add_flow(self, flow):
self.log.debug('add flow', flow=flow)
classifier_info = dict()
action_info = dict()
for field in fd.get_ofb_fields(flow):
if field.type == fd.ETH_TYPE:
classifier_info[ETH_TYPE] = field.eth_type
self.log.debug('field-type-eth-type',
eth_type=classifier_info[ETH_TYPE])
elif field.type == fd.IP_PROTO:
classifier_info[IP_PROTO] = field.ip_proto
self.log.debug('field-type-ip-proto',
ip_proto=classifier_info[IP_PROTO])
elif field.type == fd.IN_PORT:
classifier_info[IN_PORT] = field.port
self.log.debug('field-type-in-port',
in_port=classifier_info[IN_PORT])
elif field.type == fd.VLAN_VID:
classifier_info[VLAN_VID] = field.vlan_vid & 0xfff
self.log.debug('field-type-vlan-vid',
vlan=classifier_info[VLAN_VID])
elif field.type == fd.VLAN_PCP:
classifier_info[VLAN_PCP] = field.vlan_pcp
self.log.debug('field-type-vlan-pcp',
pcp=classifier_info[VLAN_PCP])
elif field.type == fd.UDP_DST:
classifier_info[UDP_DST] = field.udp_dst
self.log.debug('field-type-udp-dst',
udp_dst=classifier_info[UDP_DST])
elif field.type == fd.UDP_SRC:
classifier_info[UDP_SRC] = field.udp_src
self.log.debug('field-type-udp-src',
udp_src=classifier_info[UDP_SRC])
elif field.type == fd.IPV4_DST:
classifier_info[IPV4_DST] = field.ipv4_dst
self.log.debug('field-type-ipv4-dst',
ipv4_dst=classifier_info[IPV4_DST])
elif field.type == fd.IPV4_SRC:
classifier_info[IPV4_SRC] = field.ipv4_src
self.log.debug('field-type-ipv4-src',
ipv4_dst=classifier_info[IPV4_SRC])
elif field.type == fd.METADATA:
classifier_info[METADATA] = field.table_metadata
self.log.debug('field-type-metadata',
metadata=classifier_info[METADATA])
else:
raise NotImplementedError('field.type={}'.format(
field.type))
for action in fd.get_actions(flow):
if action.type == fd.OUTPUT:
action_info[OUTPUT] = action.output.port
self.log.debug('action-type-output',
output=action_info[OUTPUT],
in_port=classifier_info[IN_PORT])
elif action.type == fd.POP_VLAN:
if fd.get_goto_table_id(flow) is None:
self.log.debug('being taken care of by ONU', flow=flow)
return
action_info[POP_VLAN] = True
self.log.debug('action-type-pop-vlan',
in_port=classifier_info[IN_PORT])
elif action.type == fd.PUSH_VLAN:
action_info[PUSH_VLAN] = True
action_info[TPID] = action.push.ethertype
self.log.debug('action-type-push-vlan',
push_tpid=action_info[TPID],
in_port=classifier_info[IN_PORT])
if action.push.ethertype != 0x8100:
self.log.error('unhandled-tpid',
ethertype=action.push.ethertype)
elif action.type == fd.SET_FIELD:
# action_info['action_type'] = 'set_field'
_field = action.set_field.field.ofb_field
assert (action.set_field.field.oxm_class ==
OFPXMC_OPENFLOW_BASIC)
self.log.debug('action-type-set-field',
field=_field, in_port=classifier_info[IN_PORT])
if _field.type == fd.VLAN_VID:
self.log.debug('set-field-type-vlan-vid',
vlan_vid=_field.vlan_vid & 0xfff)
action_info[VLAN_VID] = (_field.vlan_vid & 0xfff)
else:
self.log.error('unsupported-action-set-field-type',
field_type=_field.type)
else:
self.log.error('unsupported-action-type',
action_type=action.type,
in_port=classifier_info[IN_PORT])
if fd.get_goto_table_id(flow) is not None \
and POP_VLAN not in action_info:
self.log.debug('being taken care of by ONU', flow=flow)
return
if OUTPUT not in action_info and METADATA in classifier_info:
# find flow in the next table
next_flow = self.find_next_flow(flow)
if next_flow is None:
return
action_info[OUTPUT] = fd.get_out_port(next_flow)
for field in fd.get_ofb_fields(next_flow):
if field.type == fd.VLAN_VID:
classifier_info[METADATA] = field.vlan_vid & 0xfff
self.log.debug('flow-ports',
classifier_inport=classifier_info[IN_PORT],
action_output=action_info[OUTPUT])
(port_no, intf_id, onu_id, uni_id) \
= self.platform.extract_access_from_flow(
classifier_info[IN_PORT], action_info[OUTPUT])
self.divide_and_add_flow(intf_id, onu_id, uni_id, port_no,
classifier_info, action_info, flow)
def _clear_flow_id_from_rm(self, flow, flow_id, flow_direction):
try:
pon_intf, onu_id, uni_id \
= self.platform.flow_extract_info(flow, flow_direction)
except ValueError:
self.log.error("failure extracting pon_intf, onu_id, uni_id info \
from flow")
else:
flows = self.resource_mgr.get_flow_id_info(pon_intf, onu_id,
uni_id, flow_id)
assert (isinstance(flows, list))
self.log.debug("retrieved-flows", flows=flows)
for idx in range(len(flows)):
if flow_direction == flows[idx]['flow_type']:
flows.pop(idx)
self.update_flow_info_to_kv_store(pon_intf, onu_id,
uni_id, flow_id, flows)
if len(flows) > 0:
# There are still flows referencing the same flow_id.
# So the flow should not be freed yet.
# For ex: Case of HSIA where same flow is shared
# between DS and US.
return
self.resource_mgr.free_flow_id(pon_intf, onu_id, uni_id, flow_id)
def retry_add_flow(self, flow):
self.log.debug("retry-add-flow")
if flow.id in self.retry_add_flow_list:
self.retry_add_flow_list.remove(flow.id)
self.add_flow(flow)
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 get_tp_path(self, intf_id, ofp_port_name, techprofile_id):
return self.tech_profile[intf_id]. \
get_tp_path(techprofile_id,
ofp_port_name)
def delete_tech_profile_instance(self, intf_id, onu_id, uni_id,
ofp_port_name):
# Remove the TP instance associated with the ONU
if ofp_port_name is None:
ofp_port_name = self.data_model.serial_number(intf_id, onu_id)
tp_id = self.resource_mgr.get_tech_profile_id_for_onu(intf_id, onu_id,
uni_id)
tp_path = self.get_tp_path(intf_id, ofp_port_name, tp_id)
self.log.debug(" tp-path-in-delete", tp_path=tp_path)
return self.tech_profile[intf_id].delete_tech_profile_instance(tp_path)
def divide_and_add_flow(self, intf_id, onu_id, uni_id, port_no, classifier,
action, flow):
self.log.debug('sorting flow', intf_id=intf_id, onu_id=onu_id,
uni_id=uni_id, port_no=port_no, classifier=classifier,
action=action)
alloc_id, gem_ports = self.create_tcont_gemport(intf_id, onu_id,
uni_id, flow.table_id)
if alloc_id is None or gem_ports is None:
self.log.error("alloc-id-gem-ports-unavailable", alloc_id=alloc_id,
gem_ports=gem_ports)
return
self.log.debug('Generated required alloc and gemport ids',
alloc_id=alloc_id, gemports=gem_ports)
# Flows can't be added specific to gemport unless p-bits are received.
# Hence adding flows for all gemports
for gemport_id in gem_ports:
if IP_PROTO in classifier:
if classifier[IP_PROTO] == 17:
self.log.debug('dhcp flow add')
self.add_dhcp_trap(intf_id, onu_id, uni_id, port_no,
classifier, action, flow, alloc_id,
gemport_id)
elif classifier[IP_PROTO] == 2:
self.log.warn('igmp flow add ignored, not implemented yet')
else:
self.log.warn("Invalid-Classifier-to-handle",
classifier=classifier,
action=action)
elif ETH_TYPE in classifier:
if classifier[ETH_TYPE] == EAP_ETH_TYPE:
self.log.debug('eapol flow add')
self.add_eapol_flow(intf_id, onu_id, uni_id, port_no,
flow, alloc_id, gemport_id)
vlan_id = self.get_subscriber_vlan(fd.get_in_port(flow))
if vlan_id is not None:
self.add_eapol_flow(intf_id, onu_id, uni_id, port_no,
flow, alloc_id, gemport_id,
vlan_id=vlan_id)
ofp_port_name = self.data_model.serial_number(intf_id,
onu_id)
tp_id = self.resource_mgr.get_tech_profile_id_for_onu(
intf_id, onu_id, uni_id)
tp_path = self.get_tp_path(intf_id, ofp_port_name, tp_id)
self.log.debug('Load-tech-profile-request-to-brcm-handler',
tp_path=tp_path)
self.data_model.onu_download_tech_profile(
intf_id, onu_id, uni_id, tp_path)
if classifier[ETH_TYPE] == LLDP_ETH_TYPE:
self.log.debug('lldp flow add')
nni_intf_id = self.data_model.olt_nni_intf_id()
self.add_lldp_flow(flow, port_no, nni_intf_id)
elif PUSH_VLAN in action:
self.add_upstream_data_flow(intf_id, onu_id, uni_id, port_no,
classifier, action, flow, alloc_id,
gemport_id)
elif POP_VLAN in action:
self.add_downstream_data_flow(intf_id, onu_id, uni_id, port_no,
classifier, action, flow,
alloc_id, gemport_id)
else:
self.log.debug('Invalid-flow-type-to-handle',
classifier=classifier,
action=action, flow=flow)
def create_tcont_gemport(self, intf_id, onu_id, uni_id, table_id):
alloc_id, gem_port_ids = None, None
pon_intf_onu_id = (intf_id, onu_id)
# If we already have allocated alloc_id and gem_ports earlier,
# render them
alloc_id = \
self.resource_mgr.get_current_alloc_ids_for_onu(pon_intf_onu_id)
gem_port_ids = \
self.resource_mgr.get_current_gemport_ids_for_onu(pon_intf_onu_id)
if alloc_id is not None and gem_port_ids is not None:
return alloc_id, gem_port_ids
try:
ofp_port_name = self.data_model.serial_number(intf_id, onu_id)
ofp_port_no = self.platform.mk_uni_port_num(intf_id,
onu_id, uni_id)
# FIXME: If table id is <= 63 using 64 as table id
if table_id < DEFAULT_TECH_PROFILE_TABLE_ID:
table_id = DEFAULT_TECH_PROFILE_TABLE_ID
# Check tech profile instance already exists for derived port name
tech_profile_instance = self.tech_profile[intf_id]. \
get_tech_profile_instance(table_id, ofp_port_name)
self.log.debug('Get-tech-profile-instance-status',
tech_profile_instance=tech_profile_instance)
if tech_profile_instance is None:
# create tech profile instance
tech_profile_instance = self.tech_profile[intf_id]. \
create_tech_profile_instance(table_id, ofp_port_name,
intf_id)
if tech_profile_instance is None:
raise Exception('Tech-profile-instance-creation-failed')
else:
self.log.debug(
'Tech-profile-instance-already-exist-for-given port-name',
ofp_port_name=ofp_port_name)
# upstream scheduler
us_scheduler = self.tech_profile[intf_id].get_us_scheduler(
tech_profile_instance)
# downstream scheduler
ds_scheduler = self.tech_profile[intf_id].get_ds_scheduler(
tech_profile_instance)
# create Tcont
tconts = self.tech_profile[intf_id].get_tconts(
tech_profile_instance, us_scheduler, ds_scheduler)
self.stub.CreateTconts(openolt_pb2.Tconts(intf_id=intf_id,
onu_id=onu_id,
uni_id=uni_id,
port_no=ofp_port_no,
tconts=tconts))
# Fetch alloc id and gemports from tech profile instance
alloc_id = tech_profile_instance.us_scheduler.alloc_id
gem_port_ids = []
for i in range(len(
tech_profile_instance.upstream_gem_port_attribute_list)):
gem_port_ids.append(
tech_profile_instance.upstream_gem_port_attribute_list[i].
gemport_id)
except Exception as e:
self.log.exception(exception=e)
# Update the allocated alloc_id and gem_port_id for the ONU/UNI to KV
# store
pon_intf_onu_id = (intf_id, onu_id, uni_id)
self.resource_mgr.resource_mgrs[intf_id].update_alloc_ids_for_onu(
pon_intf_onu_id,
list([alloc_id])
)
self.resource_mgr.resource_mgrs[intf_id].update_gemport_ids_for_onu(
pon_intf_onu_id,
gem_port_ids
)
self.resource_mgr.update_gemports_ponport_to_onu_map_on_kv_store(
gem_port_ids, intf_id, onu_id, uni_id
)
for gemport_id in gem_port_ids:
self.data_model.gemport_id_add(intf_id, onu_id, gemport_id)
return alloc_id, gem_port_ids
def add_upstream_data_flow(self, intf_id, onu_id, uni_id, port_no,
uplink_classifier, uplink_action, logical_flow,
alloc_id, gemport_id):
uplink_classifier[PACKET_TAG_TYPE] = SINGLE_TAG
self.add_hsia_flow(intf_id, onu_id, uni_id, port_no, uplink_classifier,
uplink_action, UPSTREAM,
logical_flow, alloc_id, gemport_id)
# Secondary EAP on the subscriber vlan
(eap_active, eap_logical_flow) = self.is_eap_enabled(intf_id, onu_id,
uni_id)
if eap_active:
self.add_eapol_flow(intf_id, onu_id, uni_id, port_no,
eap_logical_flow, alloc_id, gemport_id,
vlan_id=uplink_classifier[VLAN_VID])
def add_downstream_data_flow(self, intf_id, onu_id, uni_id, port_no,
downlink_classifier, downlink_action, flow,
alloc_id, gemport_id):
downlink_classifier[PACKET_TAG_TYPE] = DOUBLE_TAG
# Needed ???? It should be already there
downlink_action[POP_VLAN] = True
downlink_action[VLAN_VID] = downlink_classifier[VLAN_VID]
self.add_hsia_flow(intf_id, onu_id, uni_id, port_no,
downlink_classifier, downlink_action, DOWNSTREAM,
flow, alloc_id, gemport_id)
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_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_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)
def repush_all_different_flows(self):
# Check if the device is supposed to have flows, if so add them
# Recover static flows after a reboot
logical_flows = self.logical_flows_proxy.get('/').items
devices_flows = self.flows_proxy.get('/').items
logical_flows_ids_provisioned = [f.cookie for f in devices_flows]
for logical_flow in logical_flows:
try:
if logical_flow.id not in logical_flows_ids_provisioned:
self.add_flow(logical_flow)
except Exception as e:
self.log.exception('Problem reading this flow', e=e)
def reset_flows(self):
self.flows_proxy.update('/', Flows())
""" Add a downstream LLDP trap flow on the NNI interface
"""
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 mk_classifier(self, classifier_info):
classifier = openolt_pb2.Classifier()
if ETH_TYPE in classifier_info:
classifier.eth_type = classifier_info[ETH_TYPE]
if IP_PROTO in classifier_info:
classifier.ip_proto = classifier_info[IP_PROTO]
if VLAN_VID in classifier_info and \
classifier_info[VLAN_VID] != RESERVED_VLAN:
classifier.o_vid = classifier_info[VLAN_VID]
if METADATA in classifier_info and \
classifier_info[METADATA] != RESERVED_VLAN:
classifier.i_vid = classifier_info[METADATA]
if VLAN_PCP in classifier_info:
classifier.o_pbits = classifier_info[VLAN_PCP]
if UDP_SRC in classifier_info:
classifier.src_port = classifier_info[UDP_SRC]
if UDP_DST in classifier_info:
classifier.dst_port = classifier_info[UDP_DST]
if IPV4_DST in classifier_info:
classifier.dst_ip = classifier_info[IPV4_DST]
if IPV4_SRC in classifier_info:
classifier.src_ip = classifier_info[IPV4_SRC]
if PACKET_TAG_TYPE in classifier_info:
if classifier_info[PACKET_TAG_TYPE] == SINGLE_TAG:
classifier.pkt_tag_type = SINGLE_TAG
elif classifier_info[PACKET_TAG_TYPE] == DOUBLE_TAG:
classifier.pkt_tag_type = DOUBLE_TAG
elif classifier_info[PACKET_TAG_TYPE] == UNTAGGED:
classifier.pkt_tag_type = UNTAGGED
else:
classifier.pkt_tag_type = 'none'
return classifier
def mk_action(self, action_info):
action = openolt_pb2.Action()
if POP_VLAN in action_info:
action.o_vid = action_info[VLAN_VID]
action.cmd.remove_outer_tag = True
elif PUSH_VLAN in action_info:
action.o_vid = action_info[VLAN_VID]
action.cmd.add_outer_tag = True
elif TRAP_TO_HOST in action_info:
action.cmd.trap_to_host = True
else:
self.log.info('Invalid-action-field', action_info=action_info)
return
return action
def is_eap_enabled(self, intf_id, onu_id, uni_id):
flows = self.logical_flows_proxy.get('/').items
for flow in flows:
eap_flow = False
eap_intf_id = None
eap_onu_id = None
eap_uni_id = None
for field in fd.get_ofb_fields(flow):
if field.type == fd.ETH_TYPE:
if field.eth_type == EAP_ETH_TYPE:
eap_flow = True
if field.type == fd.IN_PORT:
eap_intf_id = self.platform.intf_id_from_uni_port_num(
field.port)
eap_onu_id = self.platform.onu_id_from_port_num(field.port)
eap_uni_id = self.platform.uni_id_from_port_num(field.port)
if eap_flow:
self.log.debug('eap flow detected', onu_id=onu_id,
uni_id=uni_id, intf_id=intf_id,
eap_intf_id=eap_intf_id, eap_onu_id=eap_onu_id,
eap_uni_id=eap_uni_id)
if eap_flow and intf_id == eap_intf_id \
and onu_id == eap_onu_id and uni_id == eap_uni_id:
return True, flow
return False, None
def get_subscriber_vlan(self, port):
self.log.debug('looking from subscriber flow for port', port=port)
flows = self.logical_flows_proxy.get('/').items
for flow in flows:
in_port = fd.get_in_port(flow)
out_port = fd.get_out_port(flow)
if in_port == port and out_port is not None and \
self.platform.intf_id_to_port_type_name(out_port) \
== Port.ETHERNET_NNI:
fields = fd.get_ofb_fields(flow)
self.log.debug('subscriber flow found', fields=fields)
for field in fields:
if field.type == OFPXMT_OFB_VLAN_VID:
self.log.debug('subscriber vlan found',
vlan_id=field.vlan_vid)
return field.vlan_vid & 0x0fff
self.log.debug('No subscriber flow found', port=port)
return None
def add_flow_to_device(self, flow, logical_flow):
self.log.debug('pushing flow to device', flow=flow)
try:
self.stub.FlowAdd(flow)
except grpc.RpcError as grpc_e:
if grpc_e.code() == grpc.StatusCode.ALREADY_EXISTS:
self.log.warn('flow already exists', e=grpc_e, flow=flow)
else:
self.log.error('failed to add flow',
logical_flow=logical_flow, flow=flow,
grpc_error=grpc_e)
return False
else:
self.register_flow(logical_flow, flow)
return True
def update_flow_info_to_kv_store(self, intf_id, onu_id, uni_id, flow_id,
flow):
self.resource_mgr.update_flow_id_info(intf_id, onu_id, uni_id,
flow_id, flow)
def register_flow(self, logical_flow, device_flow):
self.log.debug('registering flow in device',
logical_flow=logical_flow, device_flow=device_flow)
stored_flow = copy.deepcopy(logical_flow)
stored_flow.id = self.generate_stored_id(device_flow.flow_id,
device_flow.flow_type)
self.log.debug('generated device flow id', id=stored_flow.id,
flow_id=device_flow.flow_id,
direction=device_flow.flow_type)
stored_flow.cookie = logical_flow.id
flows = self.flows_proxy.get('/')
flows.items.extend([stored_flow])
self.flows_proxy.update('/', flows)
def find_next_flow(self, flow):
table_id = fd.get_goto_table_id(flow)
metadata = 0
# Prior to ONOS 1.13.5, Metadata contained the UNI output port number.
# In 1.13.5 and later, the lower 32-bits is the output port number and
# the # upper 32-bits is the inner-vid we are looking for. Use just the
# lower 32 # bits. Allows this code to work with pre- and post-1.13.5
# ONOS OltPipeline
for field in fd.get_ofb_fields(flow):
if field.type == fd.METADATA:
metadata = field.table_metadata & 0xFFFFFFFF
if table_id is None:
return None
flows = self.logical_flows_proxy.get('/').items
next_flows = []
for f in flows:
if f.table_id == table_id:
# FIXME
if fd.get_in_port(f) == fd.get_in_port(flow) and \
fd.get_out_port(f) == metadata:
next_flows.append(f)
if len(next_flows) == 0:
self.log.warning('no next flow found, it may be a timing issue',
flow=flow, number_of_flows=len(flows))
if flow.id in self.retry_add_flow_list:
self.log.debug('flow is already in retry list',
flow_id=flow.id)
else:
self.retry_add_flow_list.append(flow.id)
reactor.callLater(5, self.retry_add_flow, flow)
return None
next_flows.sort(key=lambda f: f.priority, reverse=True)
return next_flows[0]
def update_children_flows(self, device_rules_map):
for device_id, (flows, groups) in device_rules_map.iteritems():
if device_id != self.device_id:
self.root_proxy.update('/devices/{}/flows'.format(device_id),
Flows(items=flows.values()))
self.root_proxy.update('/devices/{}/flow_groups'.format(
device_id), FlowGroups(items=groups.values()))
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 generate_stored_id(self, flow_id, direction):
if direction == UPSTREAM:
self.log.debug('upstream flow, shifting id')
return 0x1 << 15 | flow_id
elif direction == DOWNSTREAM:
self.log.debug('downstream flow, not shifting id')
return flow_id
else:
self.log.warn('Unrecognized direction', direction=direction)
return flow_id
def decode_stored_id(self, id):
if id >> 15 == 0x1:
return id & 0x7fff, UPSTREAM
else:
return id, DOWNSTREAM
def _populate_tech_profile_per_pon_port(self):
for arange in self.resource_mgr.device_info.ranges:
for intf_id in arange.intf_ids:
self.tech_profile[intf_id] = \
self.resource_mgr.resource_mgrs[intf_id].tech_profile
# Make sure we have as many tech_profiles as there are pon ports on
# the device
assert len(self.tech_profile) \
== self.resource_mgr.device_info.pon_ports
def _get_flow_info_as_json_blob(self, flow, flow_store_cookie,
flow_category=None):
json_blob = MessageToDict(message=flow,
preserving_proto_field_name=True)
self.log.debug("flow-info", json_blob=json_blob)
json_blob['flow_store_cookie'] = flow_store_cookie
if flow_category is not None:
json_blob['flow_category'] = flow_category
# For flows which trap out of the NNI, the access_intf_id is invalid
# (set to -1). In such cases, we need to refer to the network_intf_id.
if flow.access_intf_id != -1:
flow_info = self.resource_mgr.get_flow_id_info(
flow.access_intf_id, flow.onu_id, flow.uni_id, flow.flow_id)
else:
# Case of LLDP trap flow from the NNI. We can't use
# flow.access_intf_id in that case, as it is invalid.
# We use flow.network_intf_id.
flow_info = self.resource_mgr.get_flow_id_info(
flow.network_intf_id, flow.onu_id, flow.uni_id, flow.flow_id)
if flow_info is None:
flow_info = list()
flow_info.append(json_blob)
else:
assert (isinstance(flow_info, list))
flow_info.append(json_blob)
return flow_info
@staticmethod
def _get_flow_store_cookie(classifier, gem_port=None):
assert isinstance(classifier, dict)
# We need unique flows per gem_port
if gem_port is not None:
to_hash = dumps(classifier, sort_keys=True) + str(gem_port)
else:
to_hash = dumps(classifier, sort_keys=True)
return hashlib.md5(to_hash).hexdigest()[:12]