/*
* nfsm_mtofh: dissect a "resulted obj" part of create-like operations
* like mkdir.
*
* for nfsv3, dissect post_op_fh3 and following post_op_attr.
* for nfsv2, dissect fhandle and following fattr.
*
* d: (IN) the vnode of the parent directry.
* v: (OUT) the corresponding vnode (we allocate one if needed)
* v3: (IN) true for nfsv3.
* f: (OUT) true if we got valid filehandle. always true for nfsv2.
*/