/* * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ /* * @test * @bug 8164900 * @summary Test for ExtendedOpenOption.DIRECT flag * @requires (os.family == "linux" | os.family == "solaris" * | os.family == "aix") * @library /test/lib * @build jdk.test.lib.Platform * @run main/native DirectIOTest */ import java.io.*; import java.nio.ByteBuffer; import java.nio.CharBuffer; import java.nio.channels.*; import java.nio.channels.FileChannel; import java.nio.file.Paths; import java.nio.file.Path; import java.nio.file.Files; import jdk.test.lib.Platform; import java.nio.file.FileStore; import java.nio.file.StandardOpenOption; import com.sun.nio.file.ExtendedOpenOption; public class DirectIOTest { private static final int SIZE = 4096; private static void testWrite(Path p) throws Exception { try (FileChannel fc = FileChannel.open(p, StandardOpenOption.WRITE, ExtendedOpenOption.DIRECT)) { FileStore fs = Files.getFileStore(p); int alignment = (int)fs.getBlockSize(); ByteBuffer src = ByteBuffer.allocateDirect(SIZE + alignment - 1) .alignedSlice(alignment); for (int j = 0; j < SIZE; j++) { src.put((byte)0); } src.flip(); fc.write(src); } } private static void testRead(Path p) throws Exception { try (FileChannel fc = FileChannel.open(p, ExtendedOpenOption.DIRECT)) { FileStore fs = Files.getFileStore(p); int alignment = (int)fs.getBlockSize(); ByteBuffer dest = ByteBuffer.allocateDirect(SIZE + alignment - 1) .alignedSlice(alignment); fc.read(dest); } } public static Path createTempFile() throws IOException { return Files.createTempFile( Paths.get(System.getProperty("test.dir", ".")), "test", null); } public static boolean isDirectIOSupportedByFS(Path p) throws Exception { boolean supported = true; if (Platform.isSolaris()) { String fsType = Files.getFileStore(p).type(); if (!fsType.equals("nfs") && !fsType.equals("ufs")) { // print a message and return without failing System.out.format("Skipping test: file system type %s of " + "FileStore of %s is neither nfs nor ufs.%n", fsType, p); supported = false; } } return supported; } private static boolean isFileInCache(Path p) { String path = p.toString(); return isFileInCache0(SIZE, path); } private static native boolean isFileInCache0(int size, String path); public static void main(String[] args) throws Exception { Path p = createTempFile(); if (!isDirectIOSupportedByFS(p)) { Files.delete(p); return; } System.loadLibrary("DirectIO"); try { testWrite(p); if (isFileInCache(p)) { throw new RuntimeException("DirectIO is not working properly with " + "write. File still exists in cache!"); } testRead(p); if (isFileInCache(p)) { throw new RuntimeException("DirectIO is not working properly with " + "read. File still exists in cache!"); } } finally { Files.delete(p); } } }