HDDS-634. OzoneFS: support basic user group and permission for file/dir.

Contributed by Xiaoyu Yao.

hadoop-ozone/ozonefs/src/main/java/org/apache/hadoop/fs/ozone/OzoneFileSystem.java

@@ -447,6 +447,14 @@ public class OzoneFileSystem extends FileSystem {
     return workingDir;
   }
 
+  /**
+   * Get the username of the FS.
+   * @return the short name of the user who instantiated the FS
+   */
+  public String getUsername() {
+    return userName;
+  }
+
   /**
    * Check whether the path is valid and then create directories.
    * Directory is represented using a key with no value.
@@ -528,11 +536,15 @@ public class OzoneFileSystem extends FileSystem {
       throw new FileNotFoundException(f + ": No such file or directory!");
     } else if (isDirectory(meta)) {
       return new FileStatus(0, true, 1, 0,
-          meta.getModificationTime(), qualifiedPath);
+          meta.getModificationTime(), 0,
+          FsPermission.getDirDefault(), getUsername(), getUsername(),
+          qualifiedPath);
     } else {
       //TODO: Fetch replication count from ratis config
       return new FileStatus(meta.getDataSize(), false, 1,
-            getDefaultBlockSize(f), meta.getModificationTime(), qualifiedPath);
+          getDefaultBlockSize(f), meta.getModificationTime(), 0,
+          FsPermission.getFileDefault(), getUsername(), getUsername(),
+          qualifiedPath);
     }
   }
 

hadoop-ozone/ozonefs/src/test/java/org/apache/hadoop/fs/ozone/TestOzoneFileInterfaces.java

@@ -23,6 +23,7 @@ import java.net.URI;
 import java.util.Arrays;
 import java.util.Collection;
 
+import org.apache.hadoop.fs.permission.FsPermission;
 import org.apache.hadoop.ozone.MiniOzoneCluster;
 import org.apache.hadoop.ozone.OzoneConsts;
 import org.junit.Before;
@@ -167,6 +168,10 @@ public class TestOzoneFileInterfaces {
     assertTrue("Modification time has not been recorded: " + status,
         status.getModificationTime() > currentTime);
 
+    assertEquals(false, status.isDirectory());
+    assertEquals(FsPermission.getFileDefault(), status.getPermission());
+    verifyOwnerGroup(status);
+
     try (FSDataInputStream inputStream = fs.open(path)) {
       byte[] buffer = new byte[stringLen];
       inputStream.readFully(0, buffer);
@@ -175,6 +180,12 @@ public class TestOzoneFileInterfaces {
     }
   }
 
+  private void verifyOwnerGroup(FileStatus fileStatus) {
+    String owner = getCurrentUser();
+    assertEquals(owner, fileStatus.getOwner());
+    assertEquals(owner, fileStatus.getGroup());
+  }
+
 
   @Test
   public void testDirectory() throws IOException {
@@ -186,6 +197,10 @@ public class TestOzoneFileInterfaces {
     FileStatus status = fs.getFileStatus(path);
     assertTrue("The created path is not directory.", status.isDirectory());
 
+    assertEquals(true, status.isDirectory());
+    assertEquals(FsPermission.getDirDefault(), status.getPermission());
+    verifyOwnerGroup(status);
+
     assertEquals(0, status.getLen());
 
     FileStatus[] statusList = fs.listStatus(createPath("/"));
@@ -195,8 +210,6 @@ public class TestOzoneFileInterfaces {
     FileStatus statusRoot = fs.getFileStatus(createPath("/"));
     assertTrue("Root dir (/) is not a directory.", status.isDirectory());
     assertEquals(0, status.getLen());
-
-
   }
 
   @Test