From f8e808504249aaa7a5278f6c91f7d300ba6dc8f8 Mon Sep 17 00:00:00 2001
From: Vishvananda Ishaya <vishvananda@gmail.com>
Date: Fri, 20 May 2011 11:21:52 -0700
Subject: synchronize vlan creation

---
 nova/network/linux_net.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/nova/network/linux_net.py b/nova/network/linux_net.py
index 85c4c278c..8e43c5a67 100644
--- a/nova/network/linux_net.py
+++ b/nova/network/linux_net.py
@@ -449,6 +449,7 @@ def ensure_vlan_bridge(vlan_num, bridge, net_attrs=None):
     ensure_bridge(bridge, interface, net_attrs)
 
 
+@utils.synchronized('ensure_vlan', external=True)
 def ensure_vlan(vlan_num):
     """Create a vlan unless it already exists."""
     interface = 'vlan%s' % vlan_num
-- 
cgit