On 04/08/2012 08:09 AM, Andreas Jaeger wrote: > DT_WHT is still not documented - and set by the coda FS only. > Google could not help me with an explanation what it is. Presumably that's for BSD-style whiteouts. For more, please see: Aurora V. Union file systems: implementations, part I. LWN.net 2009-03-25 <http://lwn.net/Articles/325369/>.