+#define MS_POSIXACL (1<<16)
+#define MS_UNBINDABLE (1<<17)
+#define MS_PRIVATE (1<<18)
+#define MS_SLAVE (1<<19)
+#define MS_SHARED (1<<20)
+#define MS_RELATIME (1<<21)
+#define MS_KERNMOUNT (1<<22)
+#define MS_I_VERSION (1<<23)
+#define MS_STRICTATIME (1<<24)
+#define MS_NOSEC (1<<28)
+#define MS_BORN (1<<29)
+#define MS_ACTIVE (1<<30)
+#define MS_NOUSER (1U<<31)
+
+#define MS_RMT_MASK (MS_RDONLY|MS_SYNCHRONOUS|MS_MANDLOCK|MS_I_VERSION)