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-rw-r--r--vswitches/ovs_dpdk_vhost.py143
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+# Copyright 2015 Intel Corporation.
+#
+# 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.
+
+"""VSPERF VSwitch implementation using DPDK and vhost ports
+"""
+
+from conf import settings
+from vswitches.vswitch import IVSwitch
+from src.ovs import VSwitchd, OFBridge
+from src.dpdk import dpdk
+
+VSWITCHD_CONST_ARGS = ['--', '--log-file']
+
+class OvsDpdkVhost(IVSwitch):
+ """VSwitch implementation using DPDK and vhost ports
+
+ Generic OVS wrapper functionality in src.ovs is maximally used. This
+ class wraps DPDK system configuration along with DPDK specific OVS
+ parameters
+
+ The method docstrings document only considerations specific to this
+ implementation. For generic information of the nature of the methods,
+ see the interface.
+ """
+ def __init__(self):
+ vswitchd_args = ['--dpdk']
+ vswitchd_args += settings.getValue('VSWITCHD_DPDK_ARGS')
+ vswitchd_args += VSWITCHD_CONST_ARGS
+
+ self._vswitchd = VSwitchd(vswitchd_args=vswitchd_args)
+ self._bridges = {}
+
+ def start(self):
+ """See IVswitch for general description
+
+ Activates DPDK kernel modules, ovsdb and vswitchd.
+ """
+ dpdk.init()
+ self._vswitchd.start()
+
+ def stop(self):
+ """See IVswitch for general description
+
+ Kills ovsdb and vswitchd and removes DPDK kernel modules.
+ """
+ self._vswitchd.kill()
+ dpdk.cleanup()
+
+ def add_switch(self, switch_name):
+ """See IVswitch for general description
+ """
+ bridge = OFBridge(switch_name)
+ bridge.create()
+ bridge.set_db_attribute('Open_vSwitch', '.',
+ 'other_config:max-idle', '60000')
+ bridge.set_db_attribute('Bridge', bridge.br_name,
+ 'datapath_type', 'netdev')
+ self._bridges[switch_name] = bridge
+
+ def del_switch(self, switch_name):
+ """See IVswitch for general description
+ """
+ bridge = self._bridges[switch_name]
+ self._bridges.pop(switch_name)
+ bridge.destroy()
+
+ def add_phy_port(self, switch_name):
+ """See IVswitch for general description
+
+ Creates a port of type dpdk.
+ The new port is named dpdk<n> where n is an integer starting from 0.
+ """
+ bridge = self._bridges[switch_name]
+ dpdk_count = self._get_port_count(bridge, 'type=dpdk')
+ port_name = 'dpdk' + str(dpdk_count)
+ params = ['--', 'set', 'Interface', port_name, 'type=dpdk']
+ of_port = bridge.add_port(port_name, params)
+
+ return (port_name, of_port)
+
+ def add_vport(self, switch_name):
+ """See IVswitch for general description
+
+ Creates a port of type dpdkvhost
+ The new port is named dpdkvhost<n> where n is an integer starting
+ from 0
+ """
+ bridge = self._bridges[switch_name]
+ vhost_count = self._get_port_count(bridge, 'type=dpdkvhost')
+ port_name = 'dpdkvhost' + str(vhost_count)
+ params = ['--', 'set', 'Interface', port_name, 'type=dpdkvhost']
+ of_port = bridge.add_port(port_name, params)
+
+ return (port_name, of_port)
+
+ def get_ports(self, switch_name):
+ """See IVswitch for general description
+ """
+ bridge = self._bridges[switch_name]
+ ports = list(bridge.get_ports().items())
+ return [(name, of_port) for (name, (of_port, _)) in ports]
+
+ def del_port(self, switch_name, port_name):
+ """See IVswitch for general description
+ """
+ bridge = self._bridges[switch_name]
+ bridge.del_port(port_name)
+
+ def add_flow(self, switch_name, flow):
+ """See IVswitch for general description
+ """
+ bridge = self._bridges[switch_name]
+ bridge.add_flow(flow)
+
+ def del_flow(self, switch_name, flow=None):
+ """See IVswitch for general description
+ """
+ flow = flow or {}
+ bridge = self._bridges[switch_name]
+ bridge.del_flow(flow)
+
+ @staticmethod
+ def _get_port_count(bridge, param):
+ """Returns the number of ports having a certain parameter
+
+ :param bridge: The src.ovs.ofctl.OFBridge on which to operate
+ :param param: The parameter to search for
+ :returns: Count of matches
+ """
+ port_params = [c for (_, (_, c)) in list(bridge.get_ports().items())]
+ param_hits = [i for i in port_params if param in i]
+ return len(param_hits)