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,
43 r'EAL: Master l*core \d+ is ready')
47 """See IVswitch for general description
49 Activates DPDK kernel modules, ovsdb and vswitchd.
52 self._vswitchd.start()
55 """See IVswitch for general description
57 Kills ovsdb and vswitchd and removes DPDK kernel modules.
62 def add_switch(self, switch_name):
63 """See IVswitch for general description
65 bridge = OFBridge(switch_name)
67 bridge.set_db_attribute('Open_vSwitch', '.',
68 'other_config:max-idle',
69 settings.getValue('VSWITCH_FLOW_TIMEOUT'))
71 if settings.getValue('VSWITCH_AFFINITIZATION_ON') == 1:
72 # Sets the PMD core mask to VSWITCH_PMD_CPU_MASK
73 # for CPU core affinitization
74 bridge.set_db_attribute('Open_vSwitch', '.',
75 'other_config:pmd-cpu-mask',
76 settings.getValue('VSWITCH_PMD_CPU_MASK'))
78 bridge.set_db_attribute('Bridge', bridge.br_name,
79 'datapath_type', 'netdev')
80 self._bridges[switch_name] = bridge
82 def del_switch(self, switch_name):
83 """See IVswitch for general description
85 bridge = self._bridges[switch_name]
86 self._bridges.pop(switch_name)
89 def add_phy_port(self, switch_name):
90 """See IVswitch for general description
92 Creates a port of type dpdk.
93 The new port is named dpdk<n> where n is an integer starting from 0.
95 bridge = self._bridges[switch_name]
96 dpdk_count = self._get_port_count(bridge, 'type=dpdk')
97 port_name = 'dpdk' + str(dpdk_count)
98 params = ['--', 'set', 'Interface', port_name, 'type=dpdk']
99 of_port = bridge.add_port(port_name, params)
101 return (port_name, of_port)
103 def add_vport(self, switch_name):
104 """See IVswitch for general description
106 Creates a port of type dpdkvhost
107 The new port is named dpdkvhost<n> where n is an integer starting
110 bridge = self._bridges[switch_name]
111 # Changed dpdkvhost to dpdkvhostuser to be able to run in Qemu 2.2
112 vhost_count = self._get_port_count(bridge, 'type=dpdkvhostuser')
113 port_name = 'dpdkvhostuser' + str(vhost_count)
114 params = ['--', 'set', 'Interface', port_name, 'type=dpdkvhostuser']
115 of_port = bridge.add_port(port_name, params)
117 return (port_name, of_port)
119 def get_ports(self, switch_name):
120 """See IVswitch for general description
122 bridge = self._bridges[switch_name]
123 ports = list(bridge.get_ports().items())
124 return [(name, of_port) for (name, (of_port, _)) in ports]
126 def del_port(self, switch_name, port_name):
127 """See IVswitch for general description
129 bridge = self._bridges[switch_name]
130 bridge.del_port(port_name)
132 def add_flow(self, switch_name, flow):
133 """See IVswitch for general description
135 bridge = self._bridges[switch_name]
136 bridge.add_flow(flow)
138 def del_flow(self, switch_name, flow=None):
139 """See IVswitch for general description
142 bridge = self._bridges[switch_name]
143 bridge.del_flow(flow)
146 def _get_port_count(bridge, param):
147 """Returns the number of ports having a certain parameter
149 :param bridge: The src.ovs.ofctl.OFBridge on which to operate
150 :param param: The parameter to search for
151 :returns: Count of matches
153 port_params = [c for (_, (_, c)) in list(bridge.get_ports().items())]
154 param_hits = [i for i in port_params if param in i]
155 return len(param_hits)