As per http://www.redhat.com/archives/libvir-list/2013-July/msg01279.html,
wait for udev events to be handled after removing a virtual NIC.
Any udev rule associated to NIC destroy could happen to run with a new
device with the same name that is being created.
---
src/util/virnetdevveth.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/src/util/virnetdevveth.c b/src/util/virnetdevveth.c
index 6905168..c8a38fb 100644
--- a/src/util/virnetdevveth.c
+++ b/src/util/virnetdevveth.c
@@ -225,5 +225,8 @@ int virNetDevVethDelete(const char *veth)
ret = 0;
cleanup:
virCommandFree(cmd);
+ /* Make sure the device is properly down: creating a new one
+ * with the same name could lead to troubles */
+ virFileWaitForDevices();
return ret;
}
--
2.1.4
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