--- old/src/java.base/unix/native/libjava/FileDescriptor_md.c	2016-09-29 14:26:28.386927340 -0700
+++ new/src/java.base/unix/native/libjava/FileDescriptor_md.c	2016-09-29 14:26:28.281927339 -0700
@@ -70,3 +70,9 @@
     int flags = fcntl(fd, F_GETFL);
     return ((flags & O_APPEND) == 0) ? JNI_FALSE : JNI_TRUE;
 }
+
+JNIEXPORT jboolean JNICALL
+Java_java_io_FileDescriptor_getDirect(JNIEnv *env, jclass fdClass, jint fd) {
+    int flags = fcntl(fd, F_GETFL);
+    return ((flags & O_DIRECT) == 0) ? JNI_FALSE : JNI_TRUE;
+}