nfs4: Partial handling of NFS4ERR_LEASE_MOVED error

src/add-ons/kernel/file_systems/nfs4/Inode.cpp

@@ -1221,6 +1221,11 @@ Inode::_HandleErrors(uint32 nfs4Error, RPC::Server* serv,
 			fFilesystem->Migrate(fHandle, serv);
 			return true;
 
+		// lease has been moved, provoke server to return NFS4ERR_MOVED
+		case NFS4ERR_LEASE_MOVED:
+			Access(0);
+			return true;
+
 		default:
 			return false;
 	}

src/add-ons/kernel/file_systems/nfs4/NFS4Server.cpp

@@ -271,6 +271,7 @@ NFS4Server::_Renewal()
 
 		if (request.Reply().NFS4Error() == NFS4ERR_STALE_CLIENTID)
 			ServerRebooted(clientId);
+		// TODO: support NFS4ERR_LEASE_MOVED
 	}
 
 	return B_OK;