vfs_copyinfh_alloc
error = vfs_copyinfh_alloc(ufhp, fhsize, &fh);
error = vfs_copyinfh_alloc(ufhp, fhsize, &fh);
error = vfs_copyinfh_alloc(ufhp, fhsize, &fh);
int vfs_copyinfh_alloc(const void *, size_t, fhandle_t **);