add new fcntl.h macros from linux v4.13
for getting/setting write lifetime hints fcntl commands were
added in linux commit c75b1d9421f80f4143e389d2d50ddfc8a28c8c35
added under _GNU_SOURCE || _BSD_SOURCE, since RWH_* life time
hints are not in the POSIX reserved namespace.
diff --git a/include/fcntl.h b/include/fcntl.h
index 0e165ca..6d8edcd 100644
--- a/include/fcntl.h
+++ b/include/fcntl.h
@@ -127,6 +127,18 @@
#define F_SEAL_GROW 0x0004
#define F_SEAL_WRITE 0x0008
+#define F_GET_RW_HINT 1035
+#define F_SET_RW_HINT 1036
+#define F_GET_FILE_RW_HINT 1037
+#define F_SET_FILE_RW_HINT 1038
+
+#define RWF_WRITE_LIFE_NOT_SET 0
+#define RWH_WRITE_LIFE_NONE 1
+#define RWH_WRITE_LIFE_SHORT 2
+#define RWH_WRITE_LIFE_MEDIUM 3
+#define RWH_WRITE_LIFE_LONG 4
+#define RWH_WRITE_LIFE_EXTREME 5
+
#define DN_ACCESS 0x00000001
#define DN_MODIFY 0x00000002
#define DN_CREATE 0x00000004