+/* Capability bits. */
+#define TDB_CAP_TYPE_MASK 0x1FFFFFFFFFFFFFFFULL
+#define TDB_CAP_NOCHECK 0x8000000000000000ULL
+#define TDB_CAP_NOWRITE 0x4000000000000000ULL
+#define TDB_CAP_NOOPEN 0x2000000000000000ULL
+
+#define TDB_OFF_IS_ERR(off) unlikely(off >= (tdb_off_t)(long)TDB_ERR_LAST)
+#define TDB_OFF_TO_ERR(off) ((enum TDB_ERROR)(long)(off))
+#define TDB_ERR_TO_OFF(ecode) ((tdb_off_t)(long)(ecode))