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 0e165ca3c98853fb2e4595c061a6dafd750b0daf..6d8edcd12db010ee0d8c63ef29b924bd19808b1a 100644 (file)
--- a/include/fcntl.h
+++ b/include/fcntl.h
@@ -127,6 +127,18 @@ int posix_fallocate(int, off_t, off_t);
 #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