| /** |
| * 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.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() throws IOException { |
| 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); |
| } |
| |
| 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()); |
| } |
| |
| } |