/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.io.nativeio;
import java.io.File;
import java.io.FileDescriptor;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.concurrent.atomic.AtomicReference;
import java.util.ArrayList;
import java.util.List;
import org.junit.Before;
import org.junit.Test;
import static org.junit.Assume.*;
import static org.junit.Assert.*;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileUtil;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.util.NativeCodeLoader;
public class TestNativeIO {
static final Log LOG = LogFactory.getLog(TestNativeIO.class);
static final File TEST_DIR = new File(
System.getProperty("test.build.data"), "testnativeio");
@Before
public void checkLoaded() {
assumeTrue(NativeCodeLoader.isNativeCodeLoaded());
}
@Before
public void setupTestDir() {
FileUtil.fullyDelete(TEST_DIR);
TEST_DIR.mkdirs();
}
@Test
public void testFstat() throws Exception {
FileOutputStream fos = new FileOutputStream(
new File(TEST_DIR, "testfstat"));
NativeIO.Stat stat = NativeIO.fstat(fos.getFD());
fos.close();
LOG.info("Stat: " + String.valueOf(stat));
assertEquals(System.getProperty("user.name"), stat.getOwner());
assertNotNull(stat.getGroup());
assertTrue(!"".equals(stat.getGroup()));
assertEquals("Stat mode field should indicate a regular file",
NativeIO.Stat.S_IFREG, stat.getMode() & NativeIO.Stat.S_IFMT);
}
/**
* Test for races in fstat usage
*
* NOTE: this test is likely to fail on RHEL 6.0 which has a non-threadsafe
* implementation of getpwuid_r.
*/
@Test
public void testMultiThreadedFstat() throws Exception {
final FileOutputStream fos = new FileOutputStream(
new File(TEST_DIR, "testfstat"));
final AtomicReference<Throwable> thrown =
new AtomicReference<Throwable>();
List<Thread> statters = new ArrayList<Thread>();
for (int i = 0; i < 10; i++) {
Thread statter = new Thread() {
public void run() {
long et = System.currentTimeMillis() + 5000;
while (System.currentTimeMillis() < et) {
try {
NativeIO.Stat stat = NativeIO.fstat(fos.getFD());
assertEquals(System.getProperty("user.name"), stat.getOwner());
assertNotNull(stat.getGroup());
assertTrue(!"".equals(stat.getGroup()));
assertEquals("Stat mode field should indicate a regular file",
NativeIO.Stat.S_IFREG, stat.getMode() & NativeIO.Stat.S_IFMT);
} catch (Throwable t) {
thrown.set(t);
}
}
}
};
statters.add(statter);
statter.start();
}
for (Thread t : statters) {
t.join();
}
fos.close();
if (thrown.get() != null) {
throw new RuntimeException(thrown.get());
}
}
@Test
public void testFstatClosedFd() throws Exception {
FileOutputStream fos = new FileOutputStream(
new File(TEST_DIR, "testfstat2"));
fos.close();
try {
NativeIO.Stat stat = NativeIO.fstat(fos.getFD());
} catch (NativeIOException nioe) {
LOG.info("Got expected exception", nioe);
assertEquals(Errno.EBADF, nioe.getErrno());
}
}
@Test
public void testOpenMissingWithoutCreate() throws Exception {
LOG.info("Open a missing file without O_CREAT and it should fail");
try {
FileDescriptor fd = NativeIO.open(
new File(TEST_DIR, "doesntexist").getAbsolutePath(),
NativeIO.O_WRONLY, 0700);
fail("Able to open a new file without O_CREAT");
} catch (NativeIOException nioe) {
LOG.info("Got expected exception", nioe);
assertEquals(Errno.ENOENT, nioe.getErrno());
}
}
@Test
public void testOpenWithCreate() throws Exception {
LOG.info("Test creating a file with O_CREAT");
FileDescriptor fd = NativeIO.open(
new File(TEST_DIR, "testWorkingOpen").getAbsolutePath(),
NativeIO.O_WRONLY | NativeIO.O_CREAT, 0700);
assertNotNull(true);
assertTrue(fd.valid());
FileOutputStream fos = new FileOutputStream(fd);
fos.write("foo".getBytes());
fos.close();
assertFalse(fd.valid());
LOG.info("Test exclusive create");
try {
fd = NativeIO.open(
new File(TEST_DIR, "testWorkingOpen").getAbsolutePath(),
NativeIO.O_WRONLY | NativeIO.O_CREAT | NativeIO.O_EXCL, 0700);
fail("Was able to create existing file with O_EXCL");
} catch (NativeIOException nioe) {
LOG.info("Got expected exception for failed exclusive create", nioe);
assertEquals(Errno.EEXIST, nioe.getErrno());
}
}
/**
* Test that opens and closes a file 10000 times - this would crash with
* "Too many open files" if we leaked fds using this access pattern.
*/
@Test
public void testFDDoesntLeak() throws IOException {
for (int i = 0; i < 10000; i++) {
FileDescriptor fd = NativeIO.open(
new File(TEST_DIR, "testNoFdLeak").getAbsolutePath(),
NativeIO.O_WRONLY | NativeIO.O_CREAT, 0700);
assertNotNull(true);
assertTrue(fd.valid());
FileOutputStream fos = new FileOutputStream(fd);
fos.write("foo".getBytes());
fos.close();
}
}
/**
* Test basic chmod operation
*/
@Test
public void testChmod() throws Exception {
try {
NativeIO.chmod("/this/file/doesnt/exist", 777);
fail("Chmod of non-existent file didn't fail");
} catch (NativeIOException nioe) {
assertEquals(Errno.ENOENT, nioe.getErrno());
}
File toChmod = new File(TEST_DIR, "testChmod");
assertTrue("Create test subject",
toChmod.exists() || toChmod.mkdir());
NativeIO.chmod(toChmod.getAbsolutePath(), 0777);
assertPermissions(toChmod, 0777);
NativeIO.chmod(toChmod.getAbsolutePath(), 0000);
assertPermissions(toChmod, 0000);
NativeIO.chmod(toChmod.getAbsolutePath(), 0644);
assertPermissions(toChmod, 0644);
}
@Test
public void testPosixFadvise() throws Exception {
FileInputStream fis = new FileInputStream("/dev/zero");
try {
NativeIO.posix_fadvise(fis.getFD(), 0, 0,
NativeIO.POSIX_FADV_SEQUENTIAL);
} catch (UnsupportedOperationException uoe) {
// we should just skip the unit test on machines where we don't
// have fadvise support
assumeTrue(false);
} finally {
fis.close();
}
try {
NativeIO.posix_fadvise(fis.getFD(), 0, 1024,
NativeIO.POSIX_FADV_SEQUENTIAL);
fail("Did not throw on bad file");
} catch (NativeIOException nioe) {
assertEquals(Errno.EBADF, nioe.getErrno());
}
try {
NativeIO.posix_fadvise(null, 0, 1024,
NativeIO.POSIX_FADV_SEQUENTIAL);
fail("Did not throw on null file");
} catch (NullPointerException npe) {
// expected
}
}
@Test
public void testSyncFileRange() throws Exception {
FileOutputStream fos = new FileOutputStream(
new File(TEST_DIR, "testSyncFileRange"));
try {
fos.write("foo".getBytes());
NativeIO.sync_file_range(fos.getFD(), 0, 1024,
NativeIO.SYNC_FILE_RANGE_WRITE);
// no way to verify that this actually has synced,
// but if it doesn't throw, we can assume it worked
} catch (UnsupportedOperationException uoe) {
// we should just skip the unit test on machines where we don't
// have fadvise support
assumeTrue(false);
} finally {
fos.close();
}
try {
NativeIO.sync_file_range(fos.getFD(), 0, 1024,
NativeIO.SYNC_FILE_RANGE_WRITE);
fail("Did not throw on bad file");
} catch (NativeIOException nioe) {
assertEquals(Errno.EBADF, nioe.getErrno());
}
}
private void assertPermissions(File f, int expected) throws IOException {
FileSystem localfs = FileSystem.getLocal(new Configuration());
FsPermission perms = localfs.getFileStatus(
new Path(f.getAbsolutePath())).getPermission();
assertEquals(expected, perms.toShort());
}
}