Merge branch 'ovs-dev', remote branch 'origin' into bsd-port

[sliver-openvswitch.git] / lib / dpif.c

diff --git a/lib/dpif.c b/lib/dpif.c
index 7cf5fba..ce7c580 100644 (file)
--- a/lib/dpif.c
+++ b/lib/dpif.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2008, 2009, 2010, 2011, 2012 Nicira Networks.
+ * Copyright (c) 2008, 2009, 2010, 2011, 2012 Nicira, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -541,6 +541,9 @@ dpif_get_max_ports(const struct dpif *dpif)
  * as the OVS_USERSPACE_ATTR_PID attribute's value, for use in flows whose
  * packets arrived on port 'port_no'.
  *
+ * A 'port_no' of UINT16_MAX is a special case: it returns a reserved PID, not
+ * allocated to any port, that the client may use for special purposes.
+ *
  * The return value is only meaningful when DPIF_UC_ACTION has been enabled in
  * the 'dpif''s listen mask.  It is allowed to change when DPIF_UC_ACTION is
  * disabled and then re-enabled, so a client that does that must be prepared to