sessions: introduce server id provider interface

server scope and owners should be configurable and bound to file filesystem and/or dataserver

src/org/dcache/chimera/nfs/v4/CompoundContext.java

@@ -30,6 +30,8 @@ import org.slf4j.LoggerFactory;
 import java.util.List;
 import org.dcache.chimera.nfs.vfs.Inode;
 import org.dcache.chimera.nfs.NfsUser;
+import org.dcache.chimera.nfs.v4.xdr.server_owner4;
+import org.dcache.chimera.nfs.v4.xdr.uint64_t;
 import org.dcache.chimera.nfs.vfs.VirtualFileSystem;
 
 
@@ -251,4 +253,27 @@ public class CompoundContext {
         assert _curretOpPosition < _totalOperationsCount;
         _curretOpPosition ++;
     }
+
+    public ServerIdProvider getServerIdProvider() {
+        // FIXME: bond to file system and DS
+        return new ServerIdProvider() {
+
+            @Override
+            public server_owner4 getOwner() {
+                server_owner4 owner = new server_owner4();
+                owner.so_minor_id = new uint64_t(0);
+                owner.so_major_id = _callInfo.
+                        getTransport().
+                        getLocalSocketAddress().
+                        getAddress().
+                        getAddress();
+                return owner;
+            }
+
+            @Override
+            public byte[] getScope() {
+                return "".getBytes();
+            }
+        };
+    }
 }

src/org/dcache/chimera/nfs/v4/OperationEXCHANGE_ID.java

@@ -246,10 +246,9 @@ public class OperationEXCHANGE_ID extends AbstractNFSv4Operation {
             res.eir_resok4.eir_sequenceid = new sequenceid4( new uint32_t(client.currentSeqID() ));
             res.eir_resok4.eir_flags = new uint32_t(_flag);
 
-            res.eir_resok4.eir_server_owner = new server_owner4();
-            res.eir_resok4.eir_server_owner.so_minor_id = new uint64_t(17);
-            res.eir_resok4.eir_server_owner.so_major_id = "Chimera".getBytes();
-            res.eir_resok4.eir_server_scope = "Chimera".getBytes();
+            ServerIdProvider serverIdProvider = context.getServerIdProvider();
+            res.eir_resok4.eir_server_owner = serverIdProvider.getOwner();
+            res.eir_resok4.eir_server_scope = serverIdProvider.getScope();
 
             res.eir_resok4.eir_server_impl_id = new nfs_impl_id4[1];
             res.eir_resok4.eir_server_impl_id[0] = new nfs_impl_id4();

src/org/dcache/chimera/nfs/v4/ServerIdProvider.java

+/*
+ * 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.chimera.nfs.v4;
+
+import org.dcache.chimera.nfs.v4.xdr.server_owner4;
+
+
+/**
+ * Interface to provide server unique information used
+ * during EXCHANGE_ID operation.
+ *
+ * The server scope allows a group of servers to indicate to clients that a set
+ * of servers sharing the same server scope value has arranged to use compatible
+ * values of otherwise opaque identifiers.  Thus, the identifiers generated by
+ * one server of that set may be presented to another of that same scope.
+ *
+ * See rfc5661 section 2.10.4 for details.
+ */
+public interface ServerIdProvider {
+
+    server_owner4 getOwner();
+
+    byte[] getScope();
+}