+ LUSTRE_SEQ_SUPER_WIDTH = ((1<< 30) * LUSTRE_SEQ_META_WIDTH)
+};
+
+/** special fid seq: used for local object create. */
+#define FID_SEQ_LOCAL_FILE (FID_SEQ_START + 1)
+
+/** special fid seq: used for .lustre objects. */
+#define LU_DOT_LUSTRE_SEQ (FID_SEQ_START + 0x02ULL)
+
+/* Note that reserved SEQ numbers below 12 will conflict with ldiskfs
+ * inodes in the IGIF namespace, so these reserved SEQ numbers must be
+ * used sparingly until ldiskfs-based MDT backends and/or IGIF FIDs
+ * have been completely removed. */
+
+/** fid sequence for distributed fs objects */
+#define FID_SEQ_DISTRIBUTED_START (FID_SEQ_START + 0x400ULL)
+
+/** special OID for local objects */
+enum {
+ /** \see osd_oi_index_create */
+ OSD_OI_FID_16_OID = 2UL,
+ /** \see fld_mod_init */
+ FLD_INDEX_OID = 3UL,
+ /** \see fid_mod_init */
+ FID_SEQ_CTL_OID = 4UL,
+ FID_SEQ_SRV_OID = 5UL,
+ /** \see mdd_mod_init */
+ MDD_ROOT_INDEX_OID = 6UL,
+ MDD_ORPHAN_OID = 7UL,
+ MDD_LOV_OBJ_OID = 8UL,
+ MDD_CAPA_KEYS_OID = 9UL,
+ MDD_OBJECTS_OID = 10UL,
+ /** \see mdt_mod_init */
+ MDT_LAST_RECV_OID = 11UL,
+ /** \see osd_mod_init */
+ OSD_REM_OBJ_DIR_OID = 12UL,