from an existing file with one of the
.BR llapi_layout_get_by_path (3),
.BR llapi_layout_get_by_fd (3),
+.BR llapi_layout_get_by_fid (3),
or
-.BR llapi_layout_get_by_fid (3)
+.BR llapi_layout_get_by_xattr (3)
functions.
.IP \[bu]
To access attribute values from
.BR llapi_layout_get_by_fd (3),
.BR llapi_layout_get_by_fid (3),
.BR llapi_layout_get_by_path (3),
+.BR llapi_layout_get_by_xattr (3),
.BR llapi_layout_ost_index_get (3),
.BR llapi_layout_ost_index_set (3),
.BR llapi_layout_pattern_get (3),