core/vswitch_controller_pvp.py

   1 # Copyright 2015 Intel Corporation.
   2 #
   3 # Licensed under the Apache License, Version 2.0 (the "License");
   4 # you may not use this file except in compliance with the License.
   5 # You may obtain a copy of the License at
   6 #
   7 #   http://www.apache.org/licenses/LICENSE-2.0
   8 #
   9 # Unless required by applicable law or agreed to in writing, software
  10 # distributed under the License is distributed on an "AS IS" BASIS,
  11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 # See the License for the specific language governing permissions and
  13 # limitations under the License.
  14
  15 """VSwitch controller for Physical to VM to Physical deployment
  16 """
  17
  18 import logging
  19
  20 from core.vswitch_controller import IVswitchController
  21 from vswitches.utils import add_ports_to_flow
  22 from conf import settings
  23
  24 _FLOW_TEMPLATE = {
  25     'idle_timeout': '0'
  26 }
  27
  28 class VswitchControllerPVP(IVswitchController):
  29     """VSwitch controller for PVP deployment scenario.
  30
  31     Attributes:
  32         _vswitch_class: The vSwitch class to be used.
  33         _vswitch: The vSwitch object controlled by this controller
  34         _deployment_scenario: A string describing the scenario to set-up in the
  35             constructor.
  36     """
  37     def __init__(self, vswitch_class, bidir=False):
  38         """Initializes up the prerequisites for the PVP deployment scenario.
  39
  40         :vswitch_class: the vSwitch class to be used.
  41         """
  42         self._logger = logging.getLogger(__name__)
  43         self._vswitch_class = vswitch_class
  44         self._vswitch = vswitch_class()
  45         self._deployment_scenario = "PVP"
  46         self._bidir = bidir
  47         self._logger.debug('Creation using ' + str(self._vswitch_class))
  48
  49     def setup(self):
  50         """ Sets up the switch for pvp
  51         """
  52         self._logger.debug('Setup using ' + str(self._vswitch_class))
  53
  54         try:
  55             self._vswitch.start()
  56
  57             bridge = settings.getValue('VSWITCH_BRIDGE_NAME')
  58             self._vswitch.add_switch(bridge)
  59
  60             (_, phy1_number) = self._vswitch.add_phy_port(bridge)
  61             (_, phy2_number) = self._vswitch.add_phy_port(bridge)
  62             (_, vport1_number) = self._vswitch.add_vport(bridge)
  63             (_, vport2_number) = self._vswitch.add_vport(bridge)
  64
  65             self._vswitch.del_flow(bridge)
  66             flow1 = add_ports_to_flow(_FLOW_TEMPLATE, phy1_number,
  67                                       vport1_number)
  68             flow2 = add_ports_to_flow(_FLOW_TEMPLATE, vport2_number,
  69                                       phy2_number)
  70             self._vswitch.add_flow(bridge, flow1)
  71             self._vswitch.add_flow(bridge, flow2)
  72
  73             if self._bidir:
  74                 flow3 = add_ports_to_flow(_FLOW_TEMPLATE, phy2_number,
  75                                           vport2_number)
  76                 flow4 = add_ports_to_flow(_FLOW_TEMPLATE, vport1_number,
  77                                           phy1_number)
  78                 self._vswitch.add_flow(bridge, flow3)
  79                 self._vswitch.add_flow(bridge, flow4)
  80
  81         except:
  82             self._vswitch.stop()
  83             raise
  84
  85     def stop(self):
  86         """Tears down the switch created in setup().
  87         """
  88         self._logger.debug('Stop using ' + str(self._vswitch_class))
  89         self._vswitch.stop()
  90
  91     def __enter__(self):
  92         self.setup()
  93
  94     def __exit__(self, type_, value, traceback):
  95         self.stop()
  96
  97     def get_vswitch(self):
  98         """See IVswitchController for description
  99         """
 100         return self._vswitch
 101
 102     def get_ports_info(self):
 103         """See IVswitchController for description
 104         """
 105         self._logger.debug('get_ports_info  using ' + str(self._vswitch_class))
 106         return self._vswitch.get_ports(settings.getValue('VSWITCH_BRIDGE_NAME'))
 107
 108     def dump_vswitch_flows(self):
 109         """See IVswitchController for description
 110         """
 111         self._vswitch.dump_flows(settings.getValue('VSWITCH_BRIDGE_NAME'))