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, traffic):
  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._traffic = traffic.copy()
  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
  67             # configure flows according to the TC definition
  68             flow_template = _FLOW_TEMPLATE.copy()
  69             if self._traffic['flow_type'] == 'IP':
  70                 flow_template.update({'dl_type':'0x0800', 'nw_src':self._traffic['l3']['srcip'],
  71                                       'nw_dst':self._traffic['l3']['dstip']})
  72
  73             flow1 = add_ports_to_flow(flow_template, phy1_number,
  74                                       vport1_number)
  75             flow2 = add_ports_to_flow(flow_template, vport2_number,
  76                                       phy2_number)
  77             self._vswitch.add_flow(bridge, flow1)
  78             self._vswitch.add_flow(bridge, flow2)
  79
  80             if self._traffic['bidir']:
  81                 flow3 = add_ports_to_flow(flow_template, phy2_number,
  82                                           vport2_number)
  83                 flow4 = add_ports_to_flow(flow_template, vport1_number,
  84                                           phy1_number)
  85                 self._vswitch.add_flow(bridge, flow3)
  86                 self._vswitch.add_flow(bridge, flow4)
  87
  88         except:
  89             self._vswitch.stop()
  90             raise
  91
  92     def stop(self):
  93         """Tears down the switch created in setup().
  94         """
  95         self._logger.debug('Stop using ' + str(self._vswitch_class))
  96         self._vswitch.stop()
  97
  98     def __enter__(self):
  99         self.setup()
 100
 101     def __exit__(self, type_, value, traceback):
 102         self.stop()
 103
 104     def get_vswitch(self):
 105         """See IVswitchController for description
 106         """
 107         return self._vswitch
 108
 109     def get_ports_info(self):
 110         """See IVswitchController for description
 111         """
 112         self._logger.debug('get_ports_info  using ' + str(self._vswitch_class))
 113         return self._vswitch.get_ports(settings.getValue('VSWITCH_BRIDGE_NAME'))
 114
 115     def dump_vswitch_flows(self):
 116         """See IVswitchController for description
 117         """
 118         self._vswitch.dump_flows(settings.getValue('VSWITCH_BRIDGE_NAME'))