Revert "Revert "HDFS-10346. Implement asynchronous setPermission/setOwner for DistributedFileSystem. Contributed by Xiaobing Zhou""

This reverts commit f23d5dfc60a017187ae57f3667ac0e688877c2dd.

hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/AsyncDistributedFileSystem.java

@@ -27,6 +27,7 @@ import java.util.concurrent.atomic.AtomicBoolean;
 import org.apache.hadoop.classification.InterfaceStability.Unstable;
 import org.apache.hadoop.fs.Options;
 import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.fs.permission.FsPermission;
 import org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB;
 import org.apache.hadoop.ipc.Client;
 
@@ -37,6 +38,9 @@ import com.google.common.util.concurrent.AbstractFuture;
  * This instance of this class is the way end-user code interacts
  * with a Hadoop DistributedFileSystem in an asynchronous manner.
  *
+ * This class is unstable, so no guarantee is provided as to reliability,
+ * stability or compatibility across any level of release granularity.
+ *
  *****************************************************************/
 @Unstable
 public class AsyncDistributedFileSystem {
@@ -111,4 +115,59 @@ public class AsyncDistributedFileSystem {
       Client.setAsynchronousMode(isAsync);
     }
   }
+
+  /**
+   * Set permission of a path.
+   *
+   * @param p
+   *          the path the permission is set to
+   * @param permission
+   *          the permission that is set to a path.
+   * @return an instance of Future, #get of which is invoked to wait for
+   *         asynchronous call being finished.
+   */
+  public Future<Void> setPermission(Path p, final FsPermission permission)
+      throws IOException {
+    dfs.getFsStatistics().incrementWriteOps(1);
+    final Path absPath = dfs.fixRelativePart(p);
+    final boolean isAsync = Client.isAsynchronousMode();
+    Client.setAsynchronousMode(true);
+    try {
+      dfs.getClient().setPermission(dfs.getPathName(absPath), permission);
+      return getReturnValue();
+    } finally {
+      Client.setAsynchronousMode(isAsync);
+    }
+  }
+
+  /**
+   * Set owner of a path (i.e. a file or a directory). The parameters username
+   * and groupname cannot both be null.
+   *
+   * @param p
+   *          The path
+   * @param username
+   *          If it is null, the original username remains unchanged.
+   * @param groupname
+   *          If it is null, the original groupname remains unchanged.
+   * @return an instance of Future, #get of which is invoked to wait for
+   *         asynchronous call being finished.
+   */
+  public Future<Void> setOwner(Path p, String username, String groupname)
+      throws IOException {
+    if (username == null && groupname == null) {
+      throw new IOException("username == null && groupname == null");
+    }
+
+    dfs.getFsStatistics().incrementWriteOps(1);
+    final Path absPath = dfs.fixRelativePart(p);
+    final boolean isAsync = Client.isAsynchronousMode();
+    Client.setAsynchronousMode(true);
+    try {
+      dfs.getClient().setOwner(dfs.getPathName(absPath), username, groupname);
+      return getReturnValue();
+    } finally {
+      Client.setAsynchronousMode(isAsync);
+    }
+  }
 }

hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/protocolPB/ClientNamenodeProtocolTranslatorPB.java

@@ -367,12 +367,30 @@ public class ClientNamenodeProtocolTranslatorPB implements
         .setPermission(PBHelperClient.convert(permission))
         .build();
     try {
-      rpcProxy.setPermission(null, req);
+      if (Client.isAsynchronousMode()) {
+        rpcProxy.setPermission(null, req);
+        setReturnValueCallback();
+      } else {
+        rpcProxy.setPermission(null, req);
+      }
     } catch (ServiceException e) {
       throw ProtobufHelper.getRemoteException(e);
     }
   }
 
+  private void setReturnValueCallback() {
+    final Callable<Message> returnMessageCallback = ProtobufRpcEngine
+        .getReturnMessageCallback();
+    Callable<Void> callBack = new Callable<Void>() {
+      @Override
+      public Void call() throws Exception {
+        returnMessageCallback.call();
+        return null;
+      }
+    };
+    RETURN_VALUE_CALLBACK.set(callBack);
+  }
+
   @Override
   public void setOwner(String src, String username, String groupname)
       throws IOException {
@@ -383,7 +401,12 @@ public class ClientNamenodeProtocolTranslatorPB implements
     if (groupname != null)
       req.setGroupname(groupname);
     try {
-      rpcProxy.setOwner(null, req.build());
+      if (Client.isAsynchronousMode()) {
+        rpcProxy.setOwner(null, req.build());
+        setReturnValueCallback();
+      } else {
+        rpcProxy.setOwner(null, req.build());
+      }
     } catch (ServiceException e) {
       throw ProtobufHelper.getRemoteException(e);
     }
@@ -513,17 +536,7 @@ public class ClientNamenodeProtocolTranslatorPB implements
     try {
       if (Client.isAsynchronousMode()) {
         rpcProxy.rename2(null, req);
-
-        final Callable<Message> returnMessageCallback = ProtobufRpcEngine
-            .getReturnMessageCallback();
-        Callable<Void> callBack = new Callable<Void>() {
-          @Override
-          public Void call() throws Exception {
-            returnMessageCallback.call();
-            return null;
-          }
-        };
-        RETURN_VALUE_CALLBACK.set(callBack);
+        setReturnValueCallback();
       } else {
         rpcProxy.rename2(null, req);
       }

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestAsyncDFSRename.java

@@ -22,8 +22,11 @@ import static org.junit.Assert.assertTrue;
 
 import java.io.IOException;
 import java.security.PrivilegedExceptionAction;
+import java.util.Arrays;
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
+import java.util.Random;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.Future;
 
@@ -31,18 +34,30 @@ import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.CommonConfigurationKeys;
+import org.apache.hadoop.fs.FileStatus;
 import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.fs.Options.Rename;
+import org.apache.hadoop.fs.permission.FsAction;
+import org.apache.hadoop.fs.permission.FsPermission;
+import org.apache.hadoop.hdfs.TestDFSPermission.PermissionGenerator;
 import org.apache.hadoop.hdfs.protocol.LocatedBlocks;
 import org.apache.hadoop.hdfs.server.blockmanagement.BlockManager;
 import org.apache.hadoop.hdfs.server.namenode.NameNodeAdapter;
 import org.apache.hadoop.ipc.AsyncCallLimitExceededException;
+import org.apache.hadoop.security.AccessControlException;
 import org.apache.hadoop.security.UserGroupInformation;
+import org.apache.hadoop.util.Time;
 import org.junit.Test;
 
 public class TestAsyncDFSRename {
   public static final Log LOG = LogFactory.getLog(TestAsyncDFSRename.class);
+  private final long seed = Time.now();
+  private final Random r = new Random(seed);
+  private final PermissionGenerator permGenerator = new PermissionGenerator(r);
+  private final short replFactor = 2;
+  private final long blockSize = 512;
+  private long fileLen = blockSize * 3;
 
   /**
    * Check the blocks of dst file are cleaned after rename with overwrite
@@ -50,8 +65,6 @@ public class TestAsyncDFSRename {
    */
   @Test(timeout = 60000)
   public void testAsyncRenameWithOverwrite() throws Exception {
-    final short replFactor = 2;
-    final long blockSize = 512;
     Configuration conf = new Configuration();
     MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf).numDataNodes(
         replFactor).build();
@@ -60,8 +73,6 @@ public class TestAsyncDFSRename {
     AsyncDistributedFileSystem adfs = dfs.getAsyncDistributedFileSystem();
 
     try {
-
-      long fileLen = blockSize * 3;
       String src = "/foo/src";
       String dst = "/foo/dst";
       String src2 = "/foo/src2";
@@ -115,8 +126,6 @@ public class TestAsyncDFSRename {
 
   @Test(timeout = 60000)
   public void testCallGetReturnValueMultipleTimes() throws Exception {
-    final short replFactor = 2;
-    final long blockSize = 512;
     final Path renameDir = new Path(
         "/test/testCallGetReturnValueMultipleTimes/");
     final Configuration conf = new HdfsConfiguration();
@@ -127,7 +136,6 @@ public class TestAsyncDFSRename {
     final DistributedFileSystem dfs = cluster.getFileSystem();
     final AsyncDistributedFileSystem adfs = dfs.getAsyncDistributedFileSystem();
     final int count = 100;
-    long fileLen = blockSize * 3;
     final Map<Integer, Future<Void>> returnFutures = new HashMap<Integer, Future<Void>>();
 
     assertTrue(dfs.mkdirs(renameDir));
@@ -178,15 +186,15 @@ public class TestAsyncDFSRename {
     }
   }
 
-  @Test(timeout = 120000)
-  public void testAggressiveConcurrentAsyncRenameWithOverwrite()
+  @Test
+  public void testConservativeConcurrentAsyncRenameWithOverwrite()
       throws Exception {
     internalTestConcurrentAsyncRenameWithOverwrite(100,
         "testAggressiveConcurrentAsyncRenameWithOverwrite");
   }
 
   @Test(timeout = 60000)
-  public void testConservativeConcurrentAsyncRenameWithOverwrite()
+  public void testAggressiveConcurrentAsyncRenameWithOverwrite()
       throws Exception {
     internalTestConcurrentAsyncRenameWithOverwrite(10000,
         "testConservativeConcurrentAsyncRenameWithOverwrite");
@@ -194,8 +202,6 @@ public class TestAsyncDFSRename {
 
   private void internalTestConcurrentAsyncRenameWithOverwrite(
       final int asyncCallLimit, final String basePath) throws Exception {
-    final short replFactor = 2;
-    final long blockSize = 512;
     final Path renameDir = new Path(String.format("/test/%s/", basePath));
     Configuration conf = new HdfsConfiguration();
     conf.setInt(CommonConfigurationKeys.IPC_CLIENT_ASYNC_CALLS_MAX_KEY,
@@ -206,7 +212,6 @@ public class TestAsyncDFSRename {
     DistributedFileSystem dfs = cluster.getFileSystem();
     AsyncDistributedFileSystem adfs = dfs.getAsyncDistributedFileSystem();
     int count = 1000;
-    long fileLen = blockSize * 3;
     int start = 0, end = 0;
     Map<Integer, Future<Void>> returnFutures = new HashMap<Integer, Future<Void>>();
 
@@ -274,8 +279,206 @@ public class TestAsyncDFSRename {
     }
   }
 
+  @Test
+  public void testConservativeConcurrentAsyncAPI() throws Exception {
+    internalTestConcurrentAsyncAPI(100, "testConservativeConcurrentAsyncAPI");
+  }
+
+  @Test(timeout = 60000)
+  public void testAggressiveConcurrentAsyncAPI() throws Exception {
+    internalTestConcurrentAsyncAPI(10000, "testAggressiveConcurrentAsyncAPI");
+  }
+
+  private void internalTestConcurrentAsyncAPI(final int asyncCallLimit,
+      final String basePath) throws Exception {
+    Configuration conf = new HdfsConfiguration();
+    String group1 = "group1";
+    String group2 = "group2";
+    String user1 = "user1";
+    int count = 500;
+
+    // explicitly turn on permission checking
+    conf.setBoolean(DFSConfigKeys.DFS_PERMISSIONS_ENABLED_KEY, true);
+    // set the limit of max async calls
+    conf.setInt(CommonConfigurationKeys.IPC_CLIENT_ASYNC_CALLS_MAX_KEY,
+        asyncCallLimit);
+
+    // create fake mapping for the groups
+    Map<String, String[]> u2gMap = new HashMap<String, String[]>(1);
+    u2gMap.put(user1, new String[] {group1, group2});
+    DFSTestUtil.updateConfWithFakeGroupMapping(conf, u2gMap);
+
+    // start mini cluster
+    final MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf)
+        .numDataNodes(3).build();
+    cluster.waitActive();
+    AsyncDistributedFileSystem adfs = cluster.getFileSystem()
+        .getAsyncDistributedFileSystem();
+
+    // prepare for test
+    FileSystem rootFs = FileSystem.get(conf);
+    final Path parent = new Path(String.format("/test/%s/", basePath));
+    final Path[] srcs = new Path[count];
+    final Path[] dsts = new Path[count];
+    short[] permissions = new short[count];
+    for (int i = 0; i < count; i++) {
+      srcs[i] = new Path(parent, "src" + i);
+      dsts[i] = new Path(parent, "dst" + i);
+      DFSTestUtil.createFile(rootFs, srcs[i], fileLen, replFactor, 1);
+      DFSTestUtil.createFile(rootFs, dsts[i], fileLen, replFactor, 1);
+      assertTrue(rootFs.exists(srcs[i]));
+      assertTrue(rootFs.getFileStatus(srcs[i]).isFile());
+      assertTrue(rootFs.exists(dsts[i]));
+      assertTrue(rootFs.getFileStatus(dsts[i]).isFile());
+      permissions[i] = permGenerator.next();
+    }
+
+    Map<Integer, Future<Void>> renameRetFutures =
+        new HashMap<Integer, Future<Void>>();
+    Map<Integer, Future<Void>> permRetFutures =
+        new HashMap<Integer, Future<Void>>();
+    Map<Integer, Future<Void>> ownerRetFutures =
+        new HashMap<Integer, Future<Void>>();
+    int start = 0, end = 0;
+    // test rename
+    for (int i = 0; i < count; i++) {
+      for (;;) {
+        try {
+          Future<Void> returnFuture = adfs.rename(srcs[i], dsts[i],
+              Rename.OVERWRITE);
+          renameRetFutures.put(i, returnFuture);
+          break;
+        } catch (AsyncCallLimitExceededException e) {
+          start = end;
+          end = i;
+          waitForReturnValues(renameRetFutures, start, end);
+        }
+      }
+    }
+
+    // wait for completing the calls
+    for (int i = start; i < count; i++) {
+      renameRetFutures.get(i).get();
+    }
+
+    // Restart NN and check the rename successfully
+    cluster.restartNameNodes();
+
+    // very the src should not exist, dst should
+    for (int i = 0; i < count; i++) {
+      assertFalse(rootFs.exists(srcs[i]));
+      assertTrue(rootFs.exists(dsts[i]));
+    }
+
+    // test permissions
+    try {
+      for (int i = 0; i < count; i++) {
+        for (;;) {
+          try {
+            Future<Void> retFuture = adfs.setPermission(dsts[i],
+                new FsPermission(permissions[i]));
+            permRetFutures.put(i, retFuture);
+            break;
+          } catch (AsyncCallLimitExceededException e) {
+            start = end;
+            end = i;
+            waitForReturnValues(permRetFutures, start, end);
+          }
+        }
+      }
+      // wait for completing the calls
+      for (int i = start; i < count; i++) {
+        permRetFutures.get(i).get();
+      }
+
+      // Restart NN and check permission then
+      cluster.restartNameNodes();
+
+      // verify the permission
+      for (int i = 0; i < count; i++) {
+        assertTrue(rootFs.exists(dsts[i]));
+        FsPermission fsPerm = new FsPermission(permissions[i]);
+        checkAccessPermissions(rootFs.getFileStatus(dsts[i]),
+            fsPerm.getUserAction());
+      }
+
+      // test setOwner
+      start = 0;
+      end = 0;
+      for (int i = 0; i < count; i++) {
+        for (;;) {
+          try {
+            Future<Void> retFuture = adfs.setOwner(dsts[i], "user1",
+                "group2");
+            ownerRetFutures.put(i, retFuture);
+            break;
+          } catch (AsyncCallLimitExceededException e) {
+            start = end;
+            end = i;
+            waitForReturnValues(ownerRetFutures, start, end);
+          }
+        }
+      }
+      // wait for completing the calls
+      for (int i = start; i < count; i++) {
+        ownerRetFutures.get(i).get();
+      }
+
+      // Restart NN and check owner then
+      cluster.restartNameNodes();
+
+      // verify the owner
+      for (int i = 0; i < count; i++) {
+        assertTrue(rootFs.exists(dsts[i]));
+        assertTrue(
+            "user1".equals(rootFs.getFileStatus(dsts[i]).getOwner()));
+        assertTrue(
+            "group2".equals(rootFs.getFileStatus(dsts[i]).getGroup()));
+      }
+    } catch (AccessControlException ace) {
+      throw ace;
+    } finally {
+      if (rootFs != null) {
+        rootFs.close();
+      }
+      if (cluster != null) {
+        cluster.shutdown();
+      }
+    }
+  }
+
+  static void checkAccessPermissions(FileStatus stat, FsAction mode)
+      throws IOException {
+    checkAccessPermissions(UserGroupInformation.getCurrentUser(), stat, mode);
+  }
+
+  static void checkAccessPermissions(final UserGroupInformation ugi,
+      FileStatus stat, FsAction mode) throws IOException {
+    FsPermission perm = stat.getPermission();
+    String user = ugi.getShortUserName();
+    List<String> groups = Arrays.asList(ugi.getGroupNames());
+
+    if (user.equals(stat.getOwner())) {
+      if (perm.getUserAction().implies(mode)) {
+        return;
+      }
+    } else if (groups.contains(stat.getGroup())) {
+      if (perm.getGroupAction().implies(mode)) {
+        return;
+      }
+    } else {
+      if (perm.getOtherAction().implies(mode)) {
+        return;
+      }
+    }
+    throw new AccessControlException(String.format(
+        "Permission denied: user=%s, path=\"%s\":%s:%s:%s%s", user, stat
+            .getPath(), stat.getOwner(), stat.getGroup(),
+        stat.isDirectory() ? "d" : "-", perm));
+  }
+
   @Test(timeout = 60000)
-  public void testAsyncRenameWithException() throws Exception {
+  public void testAsyncAPIWithException() throws Exception {
     Configuration conf = new HdfsConfiguration();
     String group1 = "group1";
     String group2 = "group2";
@@ -286,9 +489,9 @@ public class TestAsyncDFSRename {
     conf.setBoolean(DFSConfigKeys.DFS_PERMISSIONS_ENABLED_KEY, true);
 
     // create fake mapping for the groups
-    Map<String, String[]> u2g_map = new HashMap<String, String[]>(1);
-    u2g_map.put(user1, new String[] { group1, group2 });
-    DFSTestUtil.updateConfWithFakeGroupMapping(conf, u2g_map);
+    Map<String, String[]> u2gMap = new HashMap<String, String[]>(1);
+    u2gMap.put(user1, new String[] {group1, group2});
+    DFSTestUtil.updateConfWithFakeGroupMapping(conf, u2gMap);
 
     // Initiate all four users
     ugi1 = UserGroupInformation.createUserForTesting(user1, new String[] {
@@ -299,7 +502,7 @@ public class TestAsyncDFSRename {
     cluster.waitActive();
 
     FileSystem rootFs = FileSystem.get(conf);
-    final Path renameDir = new Path("/test/async_rename_exception/");
+    final Path renameDir = new Path("/test/async_api_exception/");
     final Path src = new Path(renameDir, "src");
     final Path dst = new Path(renameDir, "dst");
     rootFs.mkdirs(src);
@@ -312,11 +515,33 @@ public class TestAsyncDFSRename {
           }
         });
 
+    Future<Void> retFuture;
+    try {
+      retFuture = adfs.rename(src, dst, Rename.OVERWRITE);
+      retFuture.get();
+    } catch (ExecutionException e) {
+      checkPermissionDenied(e, src, user1);
+      assertTrue("Permission denied messages must carry the path parent", e
+          .getMessage().contains(src.getParent().toUri().getPath()));
+    }
+
+    FsPermission fsPerm = new FsPermission(permGenerator.next());
+    try {
+      retFuture = adfs.setPermission(src, fsPerm);
+      retFuture.get();
+    } catch (ExecutionException e) {
+      checkPermissionDenied(e, src, user1);
+      assertTrue("Permission denied messages must carry the name of the path",
+          e.getMessage().contains(src.getName()));
+    }
+
     try {
-      Future<Void> returnFuture = adfs.rename(src, dst, Rename.OVERWRITE);
-      returnFuture.get();
+      retFuture = adfs.setOwner(src, "user1", "group2");
+      retFuture.get();
     } catch (ExecutionException e) {
       checkPermissionDenied(e, src, user1);
+      assertTrue("Permission denied messages must carry the name of the path",
+          e.getMessage().contains(src.getName()));
     } finally {
       if (rootFs != null) {
         rootFs.close();
@@ -334,7 +559,5 @@ public class TestAsyncDFSRename {
         e.getMessage().contains("AccessControlException"));
     assertTrue("Permission denied messages must carry the username", e
         .getMessage().contains(user));
-    assertTrue("Permission denied messages must carry the path parent", e
-        .getMessage().contains(dir.getParent().toUri().getPath()));
   }
 }

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestDFSPermission.java

@@ -196,22 +196,35 @@ public class TestDFSPermission {
     return fs.getFileStatus(path).getPermission().toShort();
   }
 
-  /* create a file/directory with the default umask and permission */
   private void create(OpType op, Path name) throws IOException {
-    create(op, name, DEFAULT_UMASK, new FsPermission(DEFAULT_PERMISSION));
+    create(fs, conf, op, name);
+  }
+
+  /* create a file/directory with the default umask and permission */
+  static void create(final FileSystem fs, final Configuration fsConf,
+      OpType op, Path name) throws IOException {
+    create(fs, fsConf, op, name, DEFAULT_UMASK, new FsPermission(
+        DEFAULT_PERMISSION));
+  }
+
+  private void create(OpType op, Path name, short umask,
+      FsPermission permission)
+      throws IOException {
+    create(fs, conf, op, name, umask, permission);
   }
 
   /* create a file/directory with the given umask and permission */
-  private void create(OpType op, Path name, short umask, 
-      FsPermission permission) throws IOException {
+  static void create(final FileSystem fs, final Configuration fsConf,
+      OpType op, Path name, short umask, FsPermission permission)
+      throws IOException {
     // set umask in configuration, converting to padded octal
-    conf.set(FsPermission.UMASK_LABEL, String.format("%1$03o", umask));
+    fsConf.set(FsPermission.UMASK_LABEL, String.format("%1$03o", umask));
 
     // create the file/directory
     switch (op) {
     case CREATE:
       FSDataOutputStream out = fs.create(name, permission, true, 
-          conf.getInt(CommonConfigurationKeys.IO_FILE_BUFFER_SIZE_KEY, 4096),
+          fsConf.getInt(CommonConfigurationKeys.IO_FILE_BUFFER_SIZE_KEY, 4096),
           fs.getDefaultReplication(name), fs.getDefaultBlockSize(name), null);
       out.close();
       break;
@@ -359,7 +372,7 @@ public class TestDFSPermission {
   final static private String DIR_NAME = "dir";
   final static private String FILE_DIR_NAME = "filedir";
 
-  private enum OpType {CREATE, MKDIRS, OPEN, SET_REPLICATION,
+  enum OpType {CREATE, MKDIRS, OPEN, SET_REPLICATION,
     GET_FILEINFO, IS_DIR, EXISTS, GET_CONTENT_LENGTH, LIST, RENAME, DELETE
   };
 
@@ -615,7 +628,7 @@ public class TestDFSPermission {
   /* A random permission generator that guarantees that each permission
    * value is generated only once.
    */
-  static private class PermissionGenerator {
+  static class PermissionGenerator {
     private final Random r;
     private final short[] permissions = new short[MAX_PERMISSION + 1];
     private int numLeft = MAX_PERMISSION + 1;