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# Copyright 2013 Mellanox Technologies, Ltd
#
# 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.
from oslo_log import log as logging
from networking_mlnx.eswitchd.common import constants
LOG = logging.getLogger(__name__)
class BasicMessageHandler(object):
MSG_ATTRS_MANDATORY_MAP = set()
def __init__(self, msg):
self.msg = msg
def execute(self):
raise Exception(_("execute method MUST be implemented!"))
def validate(self):
ret = True
msg_attr = set(self.msg.keys())
for attr in self.MSG_ATTRS_MANDATORY_MAP:
if attr not in msg_attr:
return False
if 'vnic_type' in self.msg.keys():
ret = self.validate_vnic_type(self.msg['vnic_type'])
return ret
def validate_vnic_type(self, vnic_type):
if vnic_type in (constants.VIF_TYPE_HOSTDEV, ):
return True
return False
def build_response(self, status, reason=None, response=None):
if status:
msg = {'status': 'OK', 'response': response}
else:
msg = {'status': 'FAIL', 'reason': reason}
return msg
class PlugVnic(BasicMessageHandler):
MSG_ATTRS_MANDATORY_MAP = ('fabric', 'device_id',
'vnic_mac', 'dev_name')
def __init__(self, msg):
super(PlugVnic, self).__init__(msg)
def execute(self, eswitch_handler):
fabric = self.msg['fabric']
device_id = self.msg['device_id']
vnic_mac = (self.msg['vnic_mac']).lower()
dev_name = self.msg['dev_name']
dev = eswitch_handler.plug_nic(fabric, device_id, vnic_mac, dev_name)
if dev:
return self.build_response(True, response={'dev': dev})
else:
return self.build_response(False, reason='Plug vnic failed')
class DetachVnic(BasicMessageHandler):
MSG_ATTRS_MANDATORY_MAP = ('fabric', 'vnic_mac')
def __init__(self, msg):
super(DetachVnic, self).__init__(msg)
def execute(self, eswitch_handler):
fabric = self.msg['fabric']
vnic_mac = (self.msg['vnic_mac']).lower()
dev = eswitch_handler.delete_port(fabric, vnic_mac)
if dev:
return self.build_response(True, response={'dev': dev})
else:
return self.build_response(True, response={})
class SetVLAN(BasicMessageHandler):
MSG_ATTRS_MANDATORY_MAP = ('fabric', 'pci_slot', 'vlan')
def __init__(self, msg):
super(SetVLAN, self).__init__(msg)
def execute(self, eswitch_handler):
fabric = self.msg['fabric']
pci_slot = self.msg['pci_slot']
vlan = int(self.msg['vlan'])
ret = eswitch_handler.set_vlan(fabric, pci_slot, vlan)
reason = None
if not ret:
reason = 'Set VLAN Failed'
if reason:
return self.build_response(False, reason=reason)
return self.build_response(True, response={})
class GetVnics(BasicMessageHandler):
MSG_ATTRS_MANDATORY_MAP = ('fabric', )
def __init__(self, msg):
super(GetVnics, self).__init__(msg)
def execute(self, eswitch_handler):
fabric = self.msg['fabric']
if fabric == '*':
fabrics = None
else:
fabrics = [fabric]
vnics = eswitch_handler.get_vnics(fabrics)
return self.build_response(True, response=vnics)
class PortRelease(BasicMessageHandler):
MSG_ATTRS_MANDATORY_MAP = ('fabric', 'ref_by', 'pci_slot')
def __init__(self, msg):
super(PortRelease, self).__init__(msg)
def execute(self, eswitch_handler):
ref_by_keys = ['pci_slot']
fabric = self.msg['fabric']
pci_slot = self.msg['pci_slot']
ref_by = self.msg['ref_by']
reason = None
if ref_by not in ref_by_keys:
reason = "ref_by %s is not supported" % ref_by
else:
try:
eswitch_handler.port_release(fabric, pci_slot)
except Exception:
reason = "port release failed"
LOG.exception("PortRelease failed")
if reason:
return self.build_response(False, reason=reason)
return self.build_response(True, response={})
class SetFabricMapping(BasicMessageHandler):
MSG_ATTRS_MANDATORY_MAP = ('fabric', 'interface')
def __init__(self, msg):
super(SetFabricMapping, self).__init__(msg)
def execute(self, eswitch_handler):
fabric = self.msg['fabric']
interface = self.msg['interface']
response = {'fabric': fabric, 'dev': interface}
return self.build_response(True, response=response)
class PortUp(BasicMessageHandler):
MSG_ATTRS_MANDATORY_MAP = ('fabric', 'pci_slot')
def __init__(self, msg):
super(PortUp, self).__init__(msg)
def execute(self, eswitch_handler):
fabric = self.msg['fabric']
pci_slot = self.msg['pci_slot']
eswitch_handler.port_up(fabric, pci_slot)
return self.build_response(True, response={})
class PortDown(BasicMessageHandler):
MSG_ATTRS_MANDATORY_MAP = ('fabric', 'pci_slot')
def __init__(self, msg):
super(PortDown, self).__init__(msg)
def execute(self, eswitch_handler):
fabric = self.msg['fabric']
pci_slot = self.msg['pci_slot']
eswitch_handler.port_down(fabric, pci_slot)
return self.build_response(True, response={})
class GetEswitchTables(BasicMessageHandler):
MSG_ATTRS_MANDATORY_MAP = ('fabric',)
def __init__(self, msg):
super(GetEswitchTables, self).__init__(msg)
def execute(self, eswitch_handler):
fabric = self.msg.get('fabric', None)
if fabric:
fabrics = [fabric]
response = {'tables': eswitch_handler.get_eswitch_tables(fabrics)}
return self.build_response(True, response=response)
class MessageDispatch(object):
MSG_MAP = {'delete_port': DetachVnic,
'set_vlan': SetVLAN,
'get_vnics': GetVnics,
'port_release': PortRelease,
'port_up': PortUp,
'port_down': PortDown,
'define_fabric_mapping': SetFabricMapping,
'plug_nic': PlugVnic,
'get_eswitch_tables': GetEswitchTables}
def __init__(self, eswitch_handler):
self.eswitch_handler = eswitch_handler
def handle_msg(self, msg):
LOG.info("Handling message - %s", msg)
result = {}
action = msg.pop('action')
if action in MessageDispatch.MSG_MAP.keys():
msg_handler = MessageDispatch.MSG_MAP[action](msg)
if msg_handler.validate():
result = msg_handler.execute(self.eswitch_handler)
else:
LOG.error('Invalid message - cannot handle')
result = {'status': 'FAIL', 'reason': 'validation failed'}
else:
LOG.error("Unsupported action - %s", action)
result = {'action': action, 'status': 'FAIL',
'reason': 'unknown action'}
result['action'] = action
return result
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