x/vmware-nsx
Code Issues Proposed changes

Fix race condition on ml2 delete and update port methods

Browse Source 
Synchronize access to ports table when deleting and updating
a port. Otherwise concurrent update/delete request for the same port
may cause neutron server to throw an exception and return
'500 Internal server error' for such requests.

Change-Id: I868002643147ce6baace5671cffb38b4f5e66729
Closes-Bug: #1266537
This commit is contained in:
Eugene Nikanorov 2014-01-09 13:23:02 +04:00
parent 3f8bdd39c8
commit 03b9553fc2
1 changed files with 9 additions and 2 deletions
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11
neutron/plugins/ml2/plugin.py
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@ -589,7 +589,10 @@ class Ml2Plugin(db_base_plugin_v2.NeutronDbPluginV2,
session = context.session
changed_fixed_ips = 'fixed_ips' in port['port']
with session.begin(subtransactions=True):
original_port = super(Ml2Plugin, self).get_port(context, id)
port_db = (session.query(models_v2.Port).
enable_eagerloads(False).
filter_by(id=id).with_lockmode('update').one())
original_port = self._make_port_dict(port_db)
updated_port = super(Ml2Plugin, self).update_port(context, id,
port)
if self.is_address_pairs_attribute_updated(original_port, port):
@ -641,7 +644,11 @@ class Ml2Plugin(db_base_plugin_v2.NeutronDbPluginV2,
with session.begin(subtransactions=True):
if l3plugin:
l3plugin.disassociate_floatingips(context, id)
port = self.get_port(context, id)
port_db = (session.query(models_v2.Port).
enable_eagerloads(False).
filter_by(id=id).with_lockmode('update').one())
port = self._make_port_dict(port_db)
network = self.get_network(context, port['network_id'])
mech_context = driver_context.PortContext(self, context, port,
network)