Vanilla OVS support implementation

JIRA: VSPERF-57

This patch implements Vanilla OVS support.It contains:
* New IVswitch implementation: OvsVanilla,
* New configuration contants,
* New mandatory configuration variable: VSWITCH_VANILLA_PHY_PORT_NAMES
for Vanilla OVS has been added,
* Virtual ports are not yet implemented,
* Some kernel modules wrapping methods has been moved from dpdk.py to
tools.
* Fixed bug where ovsdb hasn't been killed at the end of test case run on
some platforms.

Change-Id: I21a0d84dbc4004aae564d5547387a2563f2d1e5b
Signed-off-by: Michal Weglicki <michalx.weglicki@intel.com>
Reviewed-by: Eugene Snider <Eugene.Snider@huawei.com>
Reviewed-by: Gurpreet Singh <gurpreet.singh@spirent.com>
Reviewed-by: Tv Rao <tv.rao@freescale.com>
Reviewed-by: Martin Klozik <martinx.klozik@intel.com>
Reviewed-by: Billy O Mahony <billy.o.mahony@intel.com>
Reviewed-by: Maryam Tahhan <maryam.tahhan@intel.com>

1 files changed, 132 insertions, 0 deletions

diff --git a/vswitches/ovs_vanilla.py b/vswitches/ovs_vanilla.py
new file mode 100644
index 00000000..a7d4d206
--- /dev/null
+++ b/vswitches/ovs_vanilla.py
@@ -0,0 +1,132 @@
+# 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 Vanilla OVS implementation
+"""
+
+import logging
+from conf import settings
+from vswitches.vswitch import IVSwitch
+from src.ovs import VSwitchd, OFBridge
+from tools.module_manager import ModuleManager, KernelModuleInsertMode
+
+VSWITCHD_CONST_ARGS = ['--', '--log-file']
+
+class OvsVanilla(IVSwitch):
+    """VSwitch Vanilla implementation
+
+    This is wrapper for functionality implemented in src.ovs.
+
+    The method docstrings document only considerations specific to this
+    implementation. For generic information of the nature of the methods,
+    see the interface definition.
+    """
+
+    _logger = logging.getLogger()
+    _ports = settings.getValue('VSWITCH_VANILLA_PHY_PORT_NAMES')
+    _current_id = 0
+
+    def __init__(self):
+        #vswitchd_args = VSWITCHD_CONST_ARGS
+        vswitchd_args = ["unix:%s" % VSwitchd.getDbSockPath()]
+        vswitchd_args += settings.getValue('VSWITCHD_VANILLA_ARGS')
+        self._vswitchd = VSwitchd(vswitchd_args=vswitchd_args,
+                                  expected_cmd="db.sock: connected")
+        self._bridges = {}
+        self._module_manager = ModuleManager(KernelModuleInsertMode.MODPROBE)
+
+    def start(self):
+        """See IVswitch for general description
+
+        Activates kernel modules, ovsdb and vswitchd.
+        """
+        self._module_manager.insert_modules(
+            settings.getValue('VSWITCH_VANILLA_KERNEL_MODULES'))
+        self._logger.info("Starting Vswitchd...")
+        self._vswitchd.start()
+        self._logger.info("Vswitchd...Started.")
+
+    def stop(self):
+        """See IVswitch for general description
+
+        Kills ovsdb and vswitchd and removes kernel modules.
+        """
+        self._vswitchd.kill()
+        self._module_manager.remove_modules()
+
+    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')
+        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):
+        """
+        Method adds port based on configured VSWITCH_VANILLA_PHY_PORT_NAMES
+        stored in config file.
+
+        See IVswitch for general description
+        """
+        if self._current_id == len(self._ports):
+            self._logger.error("Can't add port! There are only " +
+                               len(self._ports) + " ports " +
+                               "defined in config!")
+            raise
+
+        bridge = self._bridges[switch_name]
+        port_name = self._ports[self._current_id]
+        params = []
+        of_port = bridge.add_port(port_name, params)
+        self._current_id += 1
+        return (port_name, of_port)
+
+    def add_vport(self, switch_name):
+        """See IVswitch for general description"""
+        raise NotImplementedError("Not implemented for Vanilla OVS.")
+
+    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)