fuse: improve pretty-printing for LOOKUP, BATCH_FORGET and LINK

LOOKUP is changed to use the human-readable "NodeId: %d" output
that is used in most other places. This also makes grepping easier.

Also adds debug output for batch forget.

Change-Id: I086b4c34b17c98b7df474e90cf9b8b493ac9e040

fuse/opcode.go

@@ -251,7 +251,10 @@ func doBatchForget(server *Server, req *request) {
 	}
 
 	forgets := *(*[]_ForgetOne)(unsafe.Pointer(h))
-	for _, f := range forgets {
+	for i, f := range forgets {
+		if server.debug {
+			log.Printf("doBatchForget: forgetting %d of %d: NodeId: %d, Nlookup: %d", i+1, len(forgets), f.NodeId, f.Nlookup)
+		}
 		server.fileSystem.Forget(f.NodeId, f.Nlookup)
 	}
 }

fuse/print.go

@@ -196,13 +196,13 @@ func (me *AttrOut) string() string {
 }
 
 func (me *EntryOut) string() string {
-	return fmt.Sprintf("{%d G%d E%d.%09d A%d.%09d %v}",
-		me.NodeId, me.Generation, me.EntryValid, me.EntryValidNsec,
-		me.AttrValid, me.AttrValidNsec, &me.Attr)
+	return fmt.Sprintf("{NodeId: %d Generation=%d EntryValid=%d.%03d AttrValid=%d.%03d Attr=%v}",
+		me.NodeId, me.Generation, me.EntryValid, me.EntryValidNsec/1000000,
+		me.AttrValid, me.AttrValidNsec/1000000, &me.Attr)
 }
 
 func (me *CreateOut) string() string {
-	return fmt.Sprintf("{%v %v}", &me.EntryOut, &me.OpenOut)
+	return fmt.Sprintf("{NodeId: %d Generation=%d %v %v}", me.NodeId, me.Generation, &me.EntryOut, &me.OpenOut)
 }
 
 func (me *StatfsOut) string() string {
@@ -229,6 +229,10 @@ func (f *FallocateIn) string() string {
 		f.Fh, f.Offset, f.Length, f.Mode)
 }
 
+func (f *LinkIn) string() string {
+	return fmt.Sprintf("{Oldnodeid: %d}", f.Oldnodeid)
+}
+
 // Print pretty prints FUSE data types for kernel communication
 func Print(obj interface{}) string {
 	t, ok := obj.(interface {