librados.h: Add read/write op fadvise flags LIBRADOS_OP_FLAG_FADVISE_*.

Signed-off-by: Jianpeng Ma <jianpeng.ma@intel.com>

diff --git a/src/include/rados/librados.h b/src/include/rados/librados.h
index 9c4a5732ff69613b975f3cc555d7eb30422f0a3b..1de83a300759eac4fab0a06a1c203a7e5b9461ec 100644 (file)
--- a/src/include/rados/librados.h
+++ b/src/include/rados/librados.h
@@ -63,10 +63,20 @@ extern "C" {
  * Flags that can be set on a per-op basis via
  * rados_read_op_set_flags() and rados_write_op_set_flags().
  */
-// fail a create operation if the object already exists
-#define LIBRADOS_OP_FLAG_EXCL 1
-// allow the transaction to succeed even if the flagged op fails
-#define LIBRADOS_OP_FLAG_FAILOK 2
+enum {
+  // fail a create operation if the object already exists
+  LIBRADOS_OP_FLAG_EXCL               =  0x1,
+  // allow the transaction to succeed even if the flagged op fails
+  LIBRADOS_OP_FLAG_FAILOK            = 0x2,
+  // indicate read/write op random
+  LIBRADOS_OP_FLAG_FADVISE_RANDOM     = 0x4,
+  // indicate read/write op sequential
+  LIBRADOS_OP_FLAG_FADVISE_SEQUENTIAL = 0x8,
+  // indicate read/write data will be accessed in the near future
+  LIBRADOS_OP_FLAG_FADVISE_WILLNEED   = 0x10,
+  // indicate read/write data will not accessed int the near future
+  LIBRADOS_OP_FLAG_FADVISE_DONTNEED   = 0x20,
+};
 
 #if __GNUC__ >= 4
   #define CEPH_RADOS_API  __attribute__ ((visibility ("default")))