--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/java/nio/file/attribute/BasicFileAttributeView/SetTimesNanos.java	Thu Oct 17 20:53:35 2019 +0100
@@ -0,0 +1,110 @@
+/*
+ * Copyright (c) 2019, 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 8181493 8231174
+ * @summary Verify that nanosecond precision is maintained for file timestamps
+ * @requires (os.family == "linux") | (os.family == "mac") | (os.family == "solaris") | (os.family == "windows")
+ * @modules java.base/sun.nio.fs:+open
+ */
+
+import java.io.IOException;
+import java.lang.reflect.Method;
+import java.nio.file.Files;
+import java.nio.file.FileStore;
+import java.nio.file.Path;
+import java.nio.file.attribute.BasicFileAttributes;
+import java.nio.file.attribute.BasicFileAttributeView;
+import java.nio.file.attribute.FileTime;
+import java.util.Set;
+import java.util.concurrent.TimeUnit;
+
+public class SetTimesNanos {
+    private static final boolean IS_WINDOWS =
+        System.getProperty("os.name").startsWith("Windows");
+
+    public static void main(String[] args) throws Exception {
+        if (!IS_WINDOWS) {
+            // Check whether futimens() system call is supported
+            Class unixNativeDispatcherClass =
+                Class.forName("sun.nio.fs.UnixNativeDispatcher");
+            Method futimensSupported =
+                unixNativeDispatcherClass.getDeclaredMethod("futimensSupported");
+            futimensSupported.setAccessible(true);
+            if (!(boolean)futimensSupported.invoke(null)) {
+                System.err.println("futimens() not supported; skipping test");
+                return;
+            }
+        }
+
+        Path dirPath = Path.of("test");
+        Path dir = Files.createDirectory(dirPath);
+        FileStore store = Files.getFileStore(dir);
+        System.out.format("FileStore: \"%s\" on %s (%s)%n",
+            dir, store.name(), store.type());
+
+        Set<String> testedTypes = IS_WINDOWS ?
+            Set.of("NTFS") : Set.of("apfs", "ext4", "xfs", "zfs");
+        if (!testedTypes.contains(store.type())) {
+            System.err.format("%s not in %s; skipping test", store.type(), testedTypes);
+            return;
+        }
+
+        testNanos(dir);
+
+        Path file = Files.createFile(dir.resolve("test.dat"));
+        testNanos(file);
+    }
+
+    private static void testNanos(Path path) throws IOException {
+        // Set modification and access times
+        // Time stamp = "2017-01-01 01:01:01.123456789";
+        long timeNanos = 1_483_261_261L*1_000_000_000L + 123_456_789L;
+        FileTime pathTime = FileTime.from(timeNanos, TimeUnit.NANOSECONDS);
+        BasicFileAttributeView view =
+            Files.getFileAttributeView(path, BasicFileAttributeView.class);
+        view.setTimes(pathTime, pathTime, null);
+
+        // Windows file time resolution is 100ns so truncate
+        if (IS_WINDOWS) {
+            timeNanos = 100L*(timeNanos/100L);
+        }
+
+        // Read attributes
+        BasicFileAttributes attrs =
+            Files.readAttributes(path, BasicFileAttributes.class);
+
+        // Check timestamps
+        String[] timeNames = new String[] {"modification", "access"};
+        FileTime[] times = new FileTime[] {attrs.lastModifiedTime(),
+            attrs.lastAccessTime()};
+        for (int i = 0; i < timeNames.length; i++) {
+            long nanos = times[i].to(TimeUnit.NANOSECONDS);
+            if (nanos != timeNanos) {
+                throw new RuntimeException("Expected " + timeNames[i] +
+                    " timestamp to be '" + timeNanos + "', but was '" +
+                    nanos + "'");
+            }
+        }
+    }
+}