nfs: add exception that matches FS4ERR_OFFLOAD_DENIED state

required by server-side copy support

Acked-by: Paul Millar
Target: master

core/src/main/java/org/dcache/nfs/nfsstat.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2009 - 2018 Deutsches Elektronen-Synchroton,
+ * Copyright (c) 2009 - 2023 Deutsches Elektronen-Synchroton,
  * Member of the Helmholtz Association, (DESY), HAMBURG, GERMANY
  *
  * This library is free software; you can redistribute it and/or modify
@@ -611,6 +611,8 @@ public static void throwIfNeeded(int errorCode) throws ChimeraNFSException {
                 throw new NoXattrException();
             case nfsstat.NFSERR_XATTR2BIG:
                 throw new XattrTooBigException();
+            case nfsstat.NFS4ERR_OFFLOAD_DENIED:
+                throw new OffloadDeniedExeption();
             default:
                 throw new BadXdrException();
         }

core/src/main/java/org/dcache/nfs/status/OffloadDeniedExeption.java

@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2023 Deutsches Elektronen-Synchroton,
+ * Member of the Helmholtz Association, (DESY), HAMBURG, GERMANY
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Library General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this program (see the file COPYING.LIB for more
+ * details); if not, write to the Free Software Foundation, Inc.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+package org.dcache.nfs.status;
+
+import static org.dcache.nfs.nfsstat.NFS4ERR_OFFLOAD_DENIED;
+
+import org.dcache.nfs.ChimeraNFSException;
+
+public class OffloadDeniedExeption extends ChimeraNFSException {
+
+    public OffloadDeniedExeption() {
+        super(NFS4ERR_OFFLOAD_DENIED);
+    }
+
+    public OffloadDeniedExeption(String msg) {
+        super(NFS4ERR_OFFLOAD_DENIED, msg);
+    }
+
+    public OffloadDeniedExeption(String msg, Throwable cause) {
+        super(NFS4ERR_OFFLOAD_DENIED, msg, cause);
+    }
+
+    public OffloadDeniedExeption(Throwable cause) {
+        super(NFS4ERR_OFFLOAD_DENIED, cause);
+    }
+}