src/java.base/unix/classes/sun/nio/fs/UnixChannelFactory.java

@@ -62,10 +62,11 @@
         boolean create;
         boolean createNew;
         boolean deleteOnClose;
         boolean sync;
         boolean dsync;
+        boolean direct;
 
         static Flags toFlags(Set<? extends OpenOption> options) {
             Flags flags = new Flags();
             for (OpenOption option: options) {
                 if (option instanceof StandardOpenOption) {

@@ -86,10 +87,16 @@
                 }
                 if (option == LinkOption.NOFOLLOW_LINKS && O_NOFOLLOW != 0) {
                     flags.noFollowLinks = true;
                     continue;
                 }
+
+                if (ExtendedOptions.DIRECT.matches(option)) {
+                    flags.direct = true;
+                    continue;
+                }
+
                 if (option == null)
                     throw new NullPointerException();
                throw new UnsupportedOperationException(option + " not supported");
             }
             return flags;

@@ -132,11 +139,11 @@
             throw new IllegalArgumentException("READ + APPEND not allowed");
         if (flags.append && flags.truncateExisting)
             throw new IllegalArgumentException("APPEND + TRUNCATE_EXISTING not allowed");
 
         FileDescriptor fdObj = open(dfd, path, pathForPermissionCheck, flags, mode);
-        return FileChannelImpl.open(fdObj, path.toString(), flags.read, flags.write, null);
+        return FileChannelImpl.open(fdObj, path.toString(), flags.read, flags.write, flags.direct, null);
     }
 
     /**
      * Constructs a file channel by opening the given file.
      */