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
19 from conf import settings
20 from vswitches.vswitch import IVSwitch
21 from src.ovs import VSwitchd, OFBridge
22 from src.dpdk import dpdk
24 _VSWITCHD_CONST_ARGS = ['--', '--log-file']
26 class OvsDpdkVhost(IVSwitch):
27 """VSwitch implementation using DPDK and vhost ports
29 Generic OVS wrapper functionality in src.ovs is maximally used. This
30 class wraps DPDK system configuration along with DPDK specific OVS
33 The method docstrings document only considerations specific to this
34 implementation. For generic information of the nature of the methods,
38 _logger = logging.getLogger()
41 vswitchd_args = ['--dpdk']
42 vswitchd_args += settings.getValue('VSWITCHD_DPDK_ARGS')
43 vswitchd_args += _VSWITCHD_CONST_ARGS
45 self._logger.info("Inserting VHOST modules into kernel...")
46 dpdk.insert_vhost_modules()
48 self._vswitchd = VSwitchd(vswitchd_args=vswitchd_args,
50 r'EAL: Master l*core \d+ is ready')
54 """See IVswitch for general description
56 Activates DPDK kernel modules, ovsdb and vswitchd.
59 self._vswitchd.start()
62 """See IVswitch for general description
64 Kills ovsdb and vswitchd and removes DPDK kernel modules.
68 dpdk.remove_vhost_modules()
70 def add_switch(self, switch_name):
71 """See IVswitch for general description
73 bridge = OFBridge(switch_name)
75 bridge.set_db_attribute('Open_vSwitch', '.',
76 'other_config:max-idle',
77 settings.getValue('VSWITCH_FLOW_TIMEOUT'))
79 if settings.getValue('VSWITCH_AFFINITIZATION_ON') == 1:
80 # Sets the PMD core mask to VSWITCH_PMD_CPU_MASK
81 # for CPU core affinitization
82 bridge.set_db_attribute('Open_vSwitch', '.',
83 'other_config:pmd-cpu-mask',
84 settings.getValue('VSWITCH_PMD_CPU_MASK'))
86 bridge.set_db_attribute('Bridge', bridge.br_name,
87 'datapath_type', 'netdev')
88 self._bridges[switch_name] = bridge
90 def del_switch(self, switch_name):
91 """See IVswitch for general description
93 bridge = self._bridges[switch_name]
94 self._bridges.pop(switch_name)
97 def add_phy_port(self, switch_name):
98 """See IVswitch for general description
100 Creates a port of type dpdk.
101 The new port is named dpdk<n> where n is an integer starting from 0.
103 bridge = self._bridges[switch_name]
104 dpdk_count = self._get_port_count(bridge, 'type=dpdk')
105 port_name = 'dpdk' + str(dpdk_count)
106 params = ['--', 'set', 'Interface', port_name, 'type=dpdk']
107 of_port = bridge.add_port(port_name, params)
109 return (port_name, of_port)
111 def add_vport(self, switch_name):
112 """See IVswitch for general description
114 Creates a port of type dpdkvhost
115 The new port is named dpdkvhost<n> where n is an integer starting
118 bridge = self._bridges[switch_name]
119 # Changed dpdkvhost to dpdkvhostuser to be able to run in Qemu 2.2
120 vhost_method = settings.getValue('VHOST_METHOD')
121 if vhost_method == "cuse":
122 vhost_count = self._get_port_count(bridge, 'type=dpdkvhostcuse')
123 port_name = 'dpdkvhostcuse' + str(vhost_count)
124 params = ['--', 'set', 'Interface', port_name, 'type=dpdkvhostcuse']
126 vhost_count = self._get_port_count(bridge, 'type=dpdkvhostuser')
127 port_name = 'dpdkvhostuser' + str(vhost_count)
128 params = ['--', 'set', 'Interface', port_name, 'type=dpdkvhostuser']
130 of_port = bridge.add_port(port_name, params)
132 return (port_name, of_port)
134 def get_ports(self, switch_name):
135 """See IVswitch for general description
137 bridge = self._bridges[switch_name]
138 ports = list(bridge.get_ports().items())
139 return [(name, of_port) for (name, (of_port, _)) in ports]
141 def del_port(self, switch_name, port_name):
142 """See IVswitch for general description
144 bridge = self._bridges[switch_name]
145 bridge.del_port(port_name)
147 def add_flow(self, switch_name, flow):
148 """See IVswitch for general description
150 bridge = self._bridges[switch_name]
151 bridge.add_flow(flow)
153 def del_flow(self, switch_name, flow=None):
154 """See IVswitch for general description
157 bridge = self._bridges[switch_name]
158 bridge.del_flow(flow)
161 def _get_port_count(bridge, param):
162 """Returns the number of ports having a certain parameter
164 :param bridge: The src.ovs.ofctl.OFBridge on which to operate
165 :param param: The parameter to search for
166 :returns: Count of matches
168 port_params = [c for (_, (_, c)) in list(bridge.get_ports().items())]
169 param_hits = [i for i in port_params if param in i]
170 return len(param_hits)