+#define NFSEXP_FSID 0x2000
+#define NFSEXP_CROSSMOUNT 0x4000
+#define NFSEXP_NOACL 0x8000 /* reserved for possible ACL related use */
+#define NFSEXP_V4ROOT 0x10000
+/*
+ * All flags supported by the kernel before addition of the
+ * export_features interface:
+ */
+#define NFSEXP_OLDFLAGS 0x7E3F
+/*
+ * Flags that can vary per flavor, for kernels before addition of the
+ * export_features interface:
+ */
+#define NFSEXP_OLD_SECINFO_FLAGS (NFSEXP_READONLY | NFSEXP_ROOTSQUASH \
+ | NFSEXP_ALLSQUASH)