nfsv3: simplify size3 object

Motivation:
size3 object is a wrap around uint64, which is by itself wrap around
long.

Modification:
simplify size3 by wrapping directly long

Result:
less load on GC.

Acked-by: Marina Sahakyan
Acked-by: Paul Millar
Target: master

core/src/main/java/org/dcache/nfs/v3/HimeraNfsUtils.java

 /*
- * Copyright (c) 2009 - 2015 Deutsches Elektronen-Synchroton,
+ * Copyright (c) 2009 - 2021 Deutsches Elektronen-Synchroton,
  * Member of the Helmholtz Association, (DESY), HAMBURG, GERMANY
  *
  * This library is free software; you can redistribute it and/or modify
@@ -84,8 +84,8 @@ public class HimeraNfsUtils {
         // Get some value for this file/dir
         at.fileid = new fileid3(new uint64( stat.getFileId() ) );
 
-        at.size = new size3( new uint64( stat.getSize() ) );
-        at.used = new size3( new uint64( stat.getSize() ) );
+        at.size = new size3(stat.getSize());
+        at.used = new size3(stat.getSize());
 
         //public nfstime atime;
         at.atime = convertTimestamp(stat.getATime());
@@ -98,7 +98,7 @@ public class HimeraNfsUtils {
 
     public static void fill_attributes(Stat stat,  wcc_attr at) {
 
-        at.size = new size3( new uint64( stat.getSize() ) );
+        at.size = new size3(stat.getSize());
         //public nfstime mtime;
         at.mtime = convertTimestamp(stat.getMTime());
         //public nfstime ctime;
@@ -136,7 +136,7 @@ public class HimeraNfsUtils {
         }
 
         if( s.size.set_it ) {
-            stat.setSize( s.size.size.value.value);
+            stat.setSize( s.size.size.value);
         }
 
    /*     switch( s.atime.set_it ) {

core/src/main/java/org/dcache/nfs/v3/NfsServerV3.java

@@ -388,7 +388,7 @@ public class NfsServerV3 extends nfs3_protServerStub {
             // preferred size of READDIR request
             res.resok.dtpref = new uint32(8192);
             // max size of a file of the file system
-            res.resok.maxfilesize = new size3(new uint64(4294967296L));
+            res.resok.maxfilesize = new size3(4294967296L);
             // server time granularity -- accurate only to nearest second
             nfstime3 time = new nfstime3();
             time.seconds = new uint32(1);
@@ -429,13 +429,13 @@ public class NfsServerV3 extends nfs3_protServerStub {
             res.resok = new FSSTAT3resok();
 
             FsStat fsStat = fs.getFsStat();
-            res.resok.tbytes = new size3(new uint64(fsStat.getTotalSpace()));
-            res.resok.fbytes = new size3(new uint64(fsStat.getTotalSpace() - fsStat.getUsedSpace()));
-            res.resok.abytes = new size3(new uint64(fsStat.getTotalSpace() - fsStat.getUsedSpace()));
+            res.resok.tbytes = new size3(fsStat.getTotalSpace());
+            res.resok.fbytes = new size3(fsStat.getTotalSpace() - fsStat.getUsedSpace());
+            res.resok.abytes = new size3(fsStat.getTotalSpace() - fsStat.getUsedSpace());
 
-            res.resok.tfiles = new size3(new uint64(fsStat.getTotalFiles()));
-            res.resok.ffiles = new size3(new uint64(fsStat.getTotalFiles() - fsStat.getUsedFiles()));
-            res.resok.afiles = new size3(new uint64(fsStat.getTotalFiles() - fsStat.getUsedFiles()));
+            res.resok.tfiles = new size3(fsStat.getTotalFiles());
+            res.resok.ffiles = new size3(fsStat.getTotalFiles() - fsStat.getUsedFiles());
+            res.resok.afiles = new size3(fsStat.getTotalFiles() - fsStat.getUsedFiles());
 
             res.resok.invarsec = new uint32(0);
 

core/src/main/java/org/dcache/nfs/v3/xdr/size3.java

 /*
- * Copyright (c) 2009 - 2012 Deutsches Elektronen-Synchroton,
+ * Copyright (c) 2009 - 2021 Deutsches Elektronen-Synchroton,
  * Member of the Helmholtz Association, (DESY), HAMBURG, GERMANY
  *
  * This library is free software; you can redistribute it and/or modify
@@ -26,12 +26,12 @@ import java.io.IOException;
 
 public class size3 implements XdrAble {
 
-    public uint64 value;
+    public long value;
 
     public size3() {
     }
 
-    public size3(uint64 value) {
+    public size3(long value) {
         this.value = value;
     }
 
@@ -42,12 +42,12 @@ public class size3 implements XdrAble {
 
     public void xdrEncode(XdrEncodingStream xdr)
            throws OncRpcException, IOException {
-        value.xdrEncode(xdr);
+        xdr.xdrEncodeLong(value);
     }
 
     public void xdrDecode(XdrDecodingStream xdr)
            throws OncRpcException, IOException {
-        value = new uint64(xdr);
+        value = xdr.xdrDecodeLong();
     }
 
 }