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-rw-r--r--src/ovs/ofctl.py34
1 files changed, 28 insertions, 6 deletions
diff --git a/src/ovs/ofctl.py b/src/ovs/ofctl.py
index c052f85c..9d16ef76 100644
--- a/src/ovs/ofctl.py
+++ b/src/ovs/ofctl.py
@@ -34,6 +34,8 @@ _OVS_OFCTL_BIN = os.path.join(settings.getValue('OVS_DIR'), 'utilities',
_OVS_BRIDGE_NAME = settings.getValue('VSWITCH_BRIDGE_NAME')
+_CACHE_FILE_NAME = '/tmp/vsperf_flows_cache'
+
class OFBase(object):
"""Add/remove/show datapaths using ``ovs-ofctl``.
"""
@@ -103,6 +105,7 @@ class OFBridge(OFBase):
super(OFBridge, self).__init__(timeout)
self.br_name = br_name
self._ports = {}
+ self._cache_file = None
# context manager
@@ -121,7 +124,7 @@ class OFBridge(OFBase):
# helpers
- def run_ofctl(self, args, check_error=False):
+ def run_ofctl(self, args, check_error=False, timeout=None):
"""Run ``ovs-ofctl`` with supplied arguments.
:param args: Arguments to pass to ``ovs-ofctl``
@@ -129,8 +132,9 @@ class OFBridge(OFBase):
:return: None
"""
+ tmp_timeout = self.timeout if timeout == None else timeout
cmd = ['sudo', _OVS_OFCTL_BIN, '-O', 'OpenFlow13', '--timeout',
- str(self.timeout)] + args
+ str(tmp_timeout)] + args
return tasks.run_task(
cmd, self.logger, 'Running ovs-ofctl...', check_error)
@@ -233,7 +237,7 @@ class OFBridge(OFBase):
# flow mangement
- def add_flow(self, flow):
+ def add_flow(self, flow, cache='off'):
"""Add flow to bridge.
:param flow: Flow description as a dictionary
@@ -241,14 +245,32 @@ class OFBridge(OFBase):
:return: None
"""
+ # insert flows from cache into OVS if needed
+ if cache == 'flush':
+ if self._cache_file == None:
+ self.logger.error('flow cache flush called, but nothing is cached')
+ return
+ self.logger.debug('flows cached in %s will be added to the bridge', _CACHE_FILE_NAME)
+ self._cache_file.close()
+ self._cache_file = None
+ self.run_ofctl(['add-flows', self.br_name, _CACHE_FILE_NAME], timeout=600)
+ return
+
if not flow.get('actions'):
self.logger.error('add flow requires actions')
return
- self.logger.debug('add flow')
_flow_key = flow_key(flow)
self.logger.debug('key : %s', _flow_key)
- self.run_ofctl(['add-flow', self.br_name, _flow_key])
+
+ # insert flow to the cache or OVS
+ if cache == 'on':
+ # create and open cache file if needed
+ if self._cache_file == None:
+ self._cache_file = open(_CACHE_FILE_NAME, 'w')
+ self._cache_file.write(_flow_key + '\n')
+ else:
+ self.run_ofctl(['add-flow', self.br_name, _flow_key])
def del_flow(self, flow):
"""Delete flow from bridge.
@@ -274,7 +296,7 @@ class OFBridge(OFBase):
"""Dump all flows from bridge.
"""
self.logger.debug('dump flows')
- self.run_ofctl(['dump-flows', self.br_name])
+ self.run_ofctl(['dump-flows', self.br_name], timeout=120)
#
# helper functions