Ceph

This diff fixes the issue, however I'm unsure if the doxygen comments are correct as I just copied them from rados_aio_get_return_value.

diff --git a/src/include/rados/librados.h b/src/include/rados/librados.h
index 3aebf20..9048ad7 100644
--- a/src/include/rados/librados.h
+++ b/src/include/rados/librados.h
@@ -1706,6 +1706,22 @@ CEPH_RADOS_API int rados_aio_is_safe_and_cb(rados_completion_t c);
 CEPH_RADOS_API int rados_aio_get_return_value(rados_completion_t c);

 /**
+ * Get the version of an asychronous operation's object
+ *
+ * The return value is set when the operation is complete or safe,
+ * whichever comes first.
+ *
+ * @pre The operation is safe or complete
+ *
+ * @note BUG: complete callback may never be called when the safe
+ * message is received before the complete message
+ *
+ * @param c async operation to inspect
+ * @returns version number of the operation's object
+ */
+CEPH_RADOS_API uint64_t rados_aio_get_version(rados_completion_t c);
+
+/**
  * Release a completion
  *
  * Call this when you no longer need the completion. It may not be

master PR: https://github.com/ceph/ceph/pull/9458