1 # Copyright 2015 Intel Corporation.
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
7 # http://www.apache.org/licenses/LICENSE-2.0
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.
15 """VSPERF VSwitch implementation using DPDK and vhost ports
18 from conf import settings
19 from vswitches.vswitch import IVSwitch
20 from src.ovs import VSwitchd, OFBridge
21 from src.dpdk import dpdk
23 VSWITCHD_CONST_ARGS = ['--', '--log-file']
25 class OvsDpdkVhost(IVSwitch):
26 """VSwitch implementation using DPDK and vhost ports
28 Generic OVS wrapper functionality in src.ovs is maximally used. This
29 class wraps DPDK system configuration along with DPDK specific OVS
32 The method docstrings document only considerations specific to this
33 implementation. For generic information of the nature of the methods,
37 vswitchd_args = ['--dpdk']
38 vswitchd_args += settings.getValue('VSWITCHD_DPDK_ARGS')
39 vswitchd_args += VSWITCHD_CONST_ARGS
41 self._vswitchd = VSwitchd(vswitchd_args=vswitchd_args)
45 """See IVswitch for general description
47 Activates DPDK kernel modules, ovsdb and vswitchd.
50 self._vswitchd.start()
53 """See IVswitch for general description
55 Kills ovsdb and vswitchd and removes DPDK kernel modules.
60 def add_switch(self, switch_name):
61 """See IVswitch for general description
63 bridge = OFBridge(switch_name)
65 bridge.set_db_attribute('Open_vSwitch', '.',
66 'other_config:max-idle', '60000')
67 bridge.set_db_attribute('Bridge', bridge.br_name,
68 'datapath_type', 'netdev')
69 self._bridges[switch_name] = bridge
71 def del_switch(self, switch_name):
72 """See IVswitch for general description
74 bridge = self._bridges[switch_name]
75 self._bridges.pop(switch_name)
78 def add_phy_port(self, switch_name):
79 """See IVswitch for general description
81 Creates a port of type dpdk.
82 The new port is named dpdk<n> where n is an integer starting from 0.
84 bridge = self._bridges[switch_name]
85 dpdk_count = self._get_port_count(bridge, 'type=dpdk')
86 port_name = 'dpdk' + str(dpdk_count)
87 params = ['--', 'set', 'Interface', port_name, 'type=dpdk']
88 of_port = bridge.add_port(port_name, params)
90 return (port_name, of_port)
92 def add_vport(self, switch_name):
93 """See IVswitch for general description
95 Creates a port of type dpdkvhost
96 The new port is named dpdkvhost<n> where n is an integer starting
99 bridge = self._bridges[switch_name]
100 vhost_count = self._get_port_count(bridge, 'type=dpdkvhost')
101 port_name = 'dpdkvhost' + str(vhost_count)
102 params = ['--', 'set', 'Interface', port_name, 'type=dpdkvhost']
103 of_port = bridge.add_port(port_name, params)
105 return (port_name, of_port)
107 def get_ports(self, switch_name):
108 """See IVswitch for general description
110 bridge = self._bridges[switch_name]
111 ports = list(bridge.get_ports().items())
112 return [(name, of_port) for (name, (of_port, _)) in ports]
114 def del_port(self, switch_name, port_name):
115 """See IVswitch for general description
117 bridge = self._bridges[switch_name]
118 bridge.del_port(port_name)
120 def add_flow(self, switch_name, flow):
121 """See IVswitch for general description
123 bridge = self._bridges[switch_name]
124 bridge.add_flow(flow)
126 def del_flow(self, switch_name, flow=None):
127 """See IVswitch for general description
130 bridge = self._bridges[switch_name]
131 bridge.del_flow(flow)
134 def _get_port_count(bridge, param):
135 """Returns the number of ports having a certain parameter
137 :param bridge: The src.ovs.ofctl.OFBridge on which to operate
138 :param param: The parameter to search for
139 :returns: Count of matches
141 port_params = [c for (_, (_, c)) in list(bridge.get_ports().items())]
142 param_hits = [i for i in port_params if param in i]
143 return len(param_hits)