HDFS-17389. [FGL] Client RPCs involving read process supports fine-grained lock (#6590)

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

@@ -2047,7 +2047,7 @@ public class FSNamesystem implements Namesystem, FSNamesystemMBean,
     BatchedListEntries<OpenFileEntry> batchedListEntries;
     String normalizedPath = new Path(path).toString(); // normalize path.
     try {
-      readLock();
+      readLock(FSNamesystemLockMode.FS);
       try {
         checkOperation(OperationCategory.READ);
         if (openFilesTypes.contains(OpenFilesType.ALL_OPEN_FILES)) {
@@ -2062,7 +2062,7 @@ public class FSNamesystem implements Namesystem, FSNamesystemMBean,
           }
         }
       } finally {
-        readUnlock(operationName, getLockReportInfoSupplier(null));
+        readUnlock(FSNamesystemLockMode.FS, operationName, getLockReportInfoSupplier(null));
       }
     } catch (AccessControlException e) {
       logAuditEvent(false, operationName, null);
@@ -2074,7 +2074,7 @@ public class FSNamesystem implements Namesystem, FSNamesystemMBean,
 
   public BatchedListEntries<OpenFileEntry> getFilesBlockingDecom(long prevId,
       String path) {
-    assert hasReadLock();
+    assert hasReadLock(FSNamesystemLockMode.FS);
     final List<OpenFileEntry> openFileEntries = Lists.newArrayList();
     LightWeightHashSet<Long> openFileIds = new LightWeightHashSet<>();
     for (DatanodeDescriptor dataNode :
@@ -2214,7 +2214,7 @@ public class FSNamesystem implements Namesystem, FSNamesystemMBean,
     FSPermissionChecker.setOperationType(operationName);
     final INode inode;
     try {
-      readLock();
+      readLock(FSNamesystemLockMode.GLOBAL);
       try {
         checkOperation(OperationCategory.READ);
         res = FSDirStatAndListingOp.getBlockLocations(
@@ -2239,7 +2239,7 @@ public class FSNamesystem implements Namesystem, FSNamesystemMBean,
           checkBlockLocationsWhenObserver(res.blocks, srcArg);
         }
       } finally {
-        readUnlock(operationName, getLockReportInfoSupplier(srcArg));
+        readUnlock(FSNamesystemLockMode.GLOBAL, operationName, getLockReportInfoSupplier(srcArg));
       }
     } catch (AccessControlException e) {
       logAuditEvent(false, operationName, srcArg);
@@ -2252,7 +2252,7 @@ public class FSNamesystem implements Namesystem, FSNamesystemMBean,
       String src = srcArg;
       checkOperation(OperationCategory.WRITE);
       try {
-        writeLock();
+        writeLock(FSNamesystemLockMode.FS);
         final long now = now();
         try {
           checkOperation(OperationCategory.WRITE);
@@ -2269,7 +2269,7 @@ public class FSNamesystem implements Namesystem, FSNamesystemMBean,
             }
           }
         } finally {
-          writeUnlock(operationName, getLockReportInfoSupplier(srcArg));
+          writeUnlock(FSNamesystemLockMode.FS, operationName, getLockReportInfoSupplier(srcArg));
         }
       } catch (Throwable e) {
         LOG.warn("Failed to update the access time of " + src, e);
@@ -2671,12 +2671,12 @@ public class FSNamesystem implements Namesystem, FSNamesystemMBean,
     checkOperation(OperationCategory.READ);
     final FSPermissionChecker pc = getPermissionChecker();
     FSPermissionChecker.setOperationType(null);
-    readLock();
+    readLock(FSNamesystemLockMode.FS);
     try {
       checkOperation(OperationCategory.READ);
       return FSDirAttrOp.getPreferredBlockSize(dir, pc, src);
     } finally {
-      readUnlock("getPreferredBlockSize");
+      readUnlock(FSNamesystemLockMode.FS, "getPreferredBlockSize");
     }
   }
 
@@ -3490,13 +3490,13 @@ public class FSNamesystem implements Namesystem, FSNamesystemMBean,
     final FSPermissionChecker pc = getPermissionChecker();
     FSPermissionChecker.setOperationType(operationName);
     try {
-      readLock();
+      readLock(FSNamesystemLockMode.FS);
       try {
         checkOperation(OperationCategory.READ);
         stat = FSDirStatAndListingOp.getFileInfo(
             dir, pc, src, resolveLink, needLocation, needBlockToken);
       } finally {
-        readUnlock(operationName, getLockReportInfoSupplier(src));
+        readUnlock(FSNamesystemLockMode.FS, operationName, getLockReportInfoSupplier(src));
       }
     } catch (AccessControlException e) {
       logAuditEvent(false, operationName, src);
@@ -3520,12 +3520,12 @@ public class FSNamesystem implements Namesystem, FSNamesystemMBean,
     FSPermissionChecker.setOperationType(operationName);
     boolean success = false;
     try {
-      readLock();
+      readLock(FSNamesystemLockMode.FS);
       try {
         checkOperation(OperationCategory.READ);
         success = FSDirStatAndListingOp.isFileClosed(dir, pc, src);
       } finally {
-        readUnlock(operationName, getLockReportInfoSupplier(src));
+        readUnlock(FSNamesystemLockMode.FS, operationName, getLockReportInfoSupplier(src));
       }
     } catch (AccessControlException e) {
       logAuditEvent(false, operationName, src);
@@ -3588,12 +3588,12 @@ public class FSNamesystem implements Namesystem, FSNamesystemMBean,
     final FSPermissionChecker pc = getPermissionChecker();
     FSPermissionChecker.setOperationType(operationName);
     try {
-      readLock();
+      readLock(FSNamesystemLockMode.FS);
       try {
         checkOperation(OperationCategory.READ);
         cs = FSDirStatAndListingOp.getContentSummary(dir, pc, src);
       } finally {
-        readUnlock(operationName, getLockReportInfoSupplier(src));
+        readUnlock(FSNamesystemLockMode.FS, operationName, getLockReportInfoSupplier(src));
       }
     } catch (AccessControlException ace) {
       logAuditEvent(false, operationName, src);
@@ -4221,12 +4221,12 @@ public class FSNamesystem implements Namesystem, FSNamesystemMBean,
     final FSPermissionChecker pc = getPermissionChecker();
     FSPermissionChecker.setOperationType(operationName);
     try {
-      readLock();
+      readLock(FSNamesystemLockMode.FS);
       try {
         checkOperation(NameNode.OperationCategory.READ);
         dl = getListingInt(dir, pc, src, startAfter, needLocation);
       } finally {
-        readUnlock(operationName, getLockReportInfoSupplier(src));
+        readUnlock(FSNamesystemLockMode.FS, operationName, getLockReportInfoSupplier(src));
       }
     } catch (AccessControlException e) {
       logAuditEvent(false, operationName, src);
@@ -4292,7 +4292,7 @@ public class FSNamesystem implements Namesystem, FSNamesystemMBean,
     BatchedDirectoryListing bdl;
 
     checkOperation(OperationCategory.READ);
-    readLock();
+    readLock(FSNamesystemLockMode.FS);
     try {
       checkOperation(NameNode.OperationCategory.READ);
 
@@ -4379,7 +4379,7 @@ public class FSNamesystem implements Namesystem, FSNamesystemMBean,
             returnedStartAfter);
       }
     } finally {
-      readUnlock(operationName,
+      readUnlock(FSNamesystemLockMode.FS, operationName,
           getLockReportInfoSupplier(Arrays.toString(srcs)));
     }
     for (int i = startSrcsIndex; i < srcsIndex; i++) {
@@ -6229,7 +6229,7 @@ public class FSNamesystem implements Namesystem, FSNamesystemMBean,
       return corruptFiles;
     }
 
-    readLock();
+    readLock(FSNamesystemLockMode.GLOBAL);
     try {
       checkOperation(OperationCategory.READ);
       if (!blockManager.isPopulatingReplQueues()) {
@@ -6278,7 +6278,7 @@ public class FSNamesystem implements Namesystem, FSNamesystemMBean,
       LOG.debug("list corrupt file blocks returned: {}", count);
       return corruptFiles;
     } finally {
-      readUnlock("listCorruptFileBlocks");
+      readUnlock(FSNamesystemLockMode.GLOBAL, "listCorruptFileBlocks");
     }
   }
 
@@ -8155,14 +8155,14 @@ public class FSNamesystem implements Namesystem, FSNamesystemMBean,
           keyName, src);
       final FSPermissionChecker pc = getPermissionChecker();
       checkOperation(OperationCategory.WRITE);
-      writeLock();
+      writeLock(FSNamesystemLockMode.FS);
       try {
         checkOperation(OperationCategory.WRITE);
         checkNameNodeSafeMode("Cannot create encryption zone on " + src);
         resultingStat = FSDirEncryptionZoneOp.createEncryptionZone(dir, src,
             pc, metadata.getCipher(), keyName, logRetryCache);
       } finally {
-        writeUnlock(operationName,
+        writeUnlock(FSNamesystemLockMode.FS, operationName,
             getLockReportInfoSupplier(src, null, resultingStat));
       }
     } catch (AccessControlException e) {
@@ -8760,7 +8760,7 @@ public class FSNamesystem implements Namesystem, FSNamesystemMBean,
     final FSPermissionChecker pc = getPermissionChecker();
     FSPermissionChecker.setOperationType(operationName);
     try {
-      readLock();
+      readLock(FSNamesystemLockMode.FS);
       try {
         checkOperation(OperationCategory.READ);
         final INodesInPath iip = dir.resolvePath(pc, src, DirOp.READ);
@@ -8773,7 +8773,7 @@ public class FSNamesystem implements Namesystem, FSNamesystemMBean,
           dir.checkPathAccess(pc, iip, mode);
         }
       } finally {
-        readUnlock(operationName, getLockReportInfoSupplier(src));
+        readUnlock(FSNamesystemLockMode.FS, operationName, getLockReportInfoSupplier(src));
       }
     } catch (AccessControlException e) {
       logAuditEvent(false, operationName, src);

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

@@ -46,6 +46,7 @@ import org.apache.hadoop.hdfs.protocol.OpenFileEntry;
 import org.apache.hadoop.hdfs.protocol.OpenFilesIterator;
 import org.apache.hadoop.hdfs.server.blockmanagement.BlockInfo;
 import org.apache.hadoop.hdfs.server.common.HdfsServerConstants;
+import org.apache.hadoop.hdfs.server.namenode.fgl.FSNamesystemLockMode;
 import org.apache.hadoop.util.Daemon;
 import org.apache.hadoop.util.Lists;
 import org.apache.hadoop.util.Time;
@@ -284,7 +285,7 @@ public class LeaseManager {
    */
   public BatchedListEntries<OpenFileEntry> getUnderConstructionFiles(
       final long prevId, final String path) throws IOException {
-    assert fsnamesystem.hasReadLock();
+    assert fsnamesystem.hasReadLock(FSNamesystemLockMode.FS);
     SortedMap<Long, Lease> remainingLeases;
     synchronized (this) {
       remainingLeases = leasesById.tailMap(prevId, false);