+/* struct dir.d_flags */
+#define DIRF_FSMASK (3<<0)
+#define DIRF_NOFS (0<<0)
+#define DIRF_AFS (1<<0)
+#define DIRF_UFS (1<<1)
+#define DIRF_ISFILE (1<<3) /* it's cached file, not a directory */
+#define DIRF_OFFCNT (1<<4) /* offsprings count is valid */
+#define DIRF_CNID (1<<5) /* renumerate id */
+