ceph: add ceph.dir.layout vxattr

This virtual xattr will only appear when there is a dir layout policy
set on the directory.  It can be set via setxattr and removed via
removexattr (implemented by the MDS).

Signed-off-by: Sage Weil <sage@inktank.com>
Reviewed-by: Sam Lang <sam.lang@inktank.com>
1 file changed