HDFS-5962. Mtime and atime are not persisted for symbolic links. Contributed by Akira Ajisaka.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1570252 13f79535-47bb-0310-9956-ffa450edef68

hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt

@@ -537,6 +537,9 @@ Release 2.4.0 - UNRELEASED
 
     HDFS-5979. Typo and logger fix for fsimage PB code. (wang)
 
+    HDFS-5962. Mtime and atime are not persisted for symbolic links. (Akira
+    Ajisaka via kihwal)
+
   BREAKDOWN OF HDFS-5698 SUBTASKS AND RELATED JIRAS
 
     HDFS-5717. Save FSImage header in protobuf. (Haohui Mai via jing9)

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSImageFormatPBINode.java

@@ -279,7 +279,8 @@ public final class FSImageFormatPBINode {
           parent.getLoaderContext().getStringTable());
 
       INodeSymlink sym = new INodeSymlink(n.getId(), n.getName().toByteArray(),
-          permissions, 0, 0, s.getTarget().toStringUtf8());
+          permissions, s.getModificationTime(), s.getAccessTime(),
+          s.getTarget().toStringUtf8());
 
       return sym;
     }
@@ -482,7 +483,9 @@ public final class FSImageFormatPBINode {
       INodeSection.INodeSymlink.Builder b = INodeSection.INodeSymlink
           .newBuilder()
           .setPermission(buildPermissionStatus(n, state.getStringMap()))
-          .setTarget(ByteString.copyFrom(n.getSymlink()));
+          .setTarget(ByteString.copyFrom(n.getSymlink()))
+          .setModificationTime(n.getModificationTime())
+          .setAccessTime(n.getAccessTime());
 
       INodeSection.INode r = buildINodeCommon(n)
           .setType(INodeSection.INode.Type.SYMLINK).setSymlink(b).build();

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/tools/offlineImageViewer/LsrPBImage.java

@@ -170,8 +170,9 @@ final class LsrPBImage {
       PermissionStatus p = FSImageFormatPBINode.Loader.loadPermission(
           d.getPermission(), stringTable);
       out.print(String.format("-%s  - %8s %10s %10s %10d %s%s -> %s\n", p
-          .getPermission().toString(), p.getUserName(), p.getGroupName(), 0, 0,
-          parent, inode.getName().toStringUtf8(), d.getTarget().toStringUtf8()));
+          .getPermission().toString(), p.getUserName(), p.getGroupName(), d
+          .getModificationTime(), 0, parent, inode.getName().toStringUtf8(),
+          d.getTarget().toStringUtf8()));
     }
       break;
     default:

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/tools/offlineImageViewer/PBImageXmlWriter.java

@@ -289,8 +289,9 @@ public final class PBImageXmlWriter {
   }
 
   private void dumpINodeSymlink(INodeSymlink s) {
-    o("permission", dumpPermission(s.getPermission())).o("target",
-        s.getTarget().toStringUtf8());
+    o("permission", dumpPermission(s.getPermission()))
+        .o("target", s.getTarget().toStringUtf8())
+        .o("mtime", s.getModificationTime()).o("atime", s.getAccessTime());
   }
 
   private void dumpNameSection(InputStream in) throws IOException {

hadoop-hdfs-project/hadoop-hdfs/src/main/proto/fsimage.proto

@@ -130,6 +130,8 @@ message INodeSection {
   message INodeSymlink {
     optional fixed64 permission = 1;
     optional bytes target = 2;
+    optional uint64 modificationTime = 3;
+    optional uint64 accessTime = 4;
   }
 
   message INode {
@@ -300,4 +302,4 @@ message CacheManagerSection {
   required uint32 numDirectives   = 3;
   // repeated CachePoolInfoProto pools
   // repeated CacheDirectiveInfoProto directives
-}
+}

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestFSImage.java

@@ -34,6 +34,7 @@ import org.apache.hadoop.hdfs.DFSOutputStream;
 import org.apache.hadoop.hdfs.DistributedFileSystem;
 import org.apache.hadoop.hdfs.MiniDFSCluster;
 import org.apache.hadoop.hdfs.client.HdfsDataOutputStream.SyncFlag;
+import org.apache.hadoop.hdfs.protocol.HdfsConstants;
 import org.apache.hadoop.hdfs.protocol.HdfsConstants.SafeModeAction;
 import org.apache.hadoop.hdfs.server.blockmanagement.BlockInfo;
 import org.apache.hadoop.hdfs.server.common.HdfsServerConstants.BlockUCState;
@@ -135,4 +136,51 @@ public class TestFSImage {
       }
     }
   }
+
+  /**
+   * Ensure mtime and atime can be loaded from fsimage.
+   */
+  @Test(timeout=60000)
+  public void testLoadMtimeAtime() throws Exception {
+    Configuration conf = new Configuration();
+    MiniDFSCluster cluster = null;
+    try {
+      cluster = new MiniDFSCluster.Builder(conf).numDataNodes(1).build();
+      cluster.waitActive();
+      DistributedFileSystem hdfs = cluster.getFileSystem();
+      String userDir = hdfs.getHomeDirectory().toUri().getPath().toString();
+      Path file = new Path(userDir, "file");
+      Path dir = new Path(userDir, "/dir");
+      Path link = new Path(userDir, "/link");
+      hdfs.createNewFile(file);
+      hdfs.mkdirs(dir);
+      hdfs.createSymlink(file, link, false);
+
+      long mtimeFile = hdfs.getFileStatus(file).getModificationTime();
+      long atimeFile = hdfs.getFileStatus(file).getAccessTime();
+      long mtimeDir = hdfs.getFileStatus(dir).getModificationTime();
+      long mtimeLink = hdfs.getFileLinkStatus(link).getModificationTime();
+      long atimeLink = hdfs.getFileLinkStatus(link).getAccessTime();
+
+      // save namespace and restart cluster
+      hdfs.setSafeMode(HdfsConstants.SafeModeAction.SAFEMODE_ENTER);
+      hdfs.saveNamespace();
+      hdfs.setSafeMode(HdfsConstants.SafeModeAction.SAFEMODE_LEAVE);
+      cluster.shutdown();
+      cluster = new MiniDFSCluster.Builder(conf).format(false)
+          .numDataNodes(1).build();
+      cluster.waitActive();
+      hdfs = cluster.getFileSystem();
+      
+      assertEquals(mtimeFile, hdfs.getFileStatus(file).getModificationTime());
+      assertEquals(atimeFile, hdfs.getFileStatus(file).getAccessTime());
+      assertEquals(mtimeDir, hdfs.getFileStatus(dir).getModificationTime());
+      assertEquals(mtimeLink, hdfs.getFileLinkStatus(link).getModificationTime());
+      assertEquals(atimeLink, hdfs.getFileLinkStatus(link).getAccessTime());
+    } finally {
+      if (cluster != null) {
+        cluster.shutdown();
+      }
+    }
+  }
 }