server: don't read concatenated GGUF files

server/model.go

@@ -177,20 +177,11 @@ func parseFromFile(ctx context.Context, command string, baseLayers []*layerGGML,
 		return nil, fmt.Errorf("unsupported content type: %s", contentType)
 	}
 
-	stat, err := file.Stat()
+	ggml, _, err := llm.DecodeGGML(file, 0)
 	if err != nil {
 		return nil, err
 	}
 
-	var offset int64
-	for offset < stat.Size() {
-		ggml, n, err := llm.DecodeGGML(file, 0)
-		if errors.Is(err, io.EOF) {
-			break
-		} else if err != nil {
-			return nil, err
-		}
-
 	mediatype := "application/vnd.ollama.image.model"
 	if ggml.Name() == "ggla" || ggml.KV().Kind() == "adapter" {
 		mediatype = "application/vnd.ollama.image.adapter"
@@ -200,25 +191,12 @@ func parseFromFile(ctx context.Context, command string, baseLayers []*layerGGML,
 		mediatype = "application/vnd.ollama.image.projector"
 	}
 
-		var layer Layer
+	layer, err := NewLayerFromLayer(digest, mediatype, file.Name())
-		if digest != "" && n == stat.Size() && offset == 0 {
-			layer, err = NewLayerFromLayer(digest, mediatype, file.Name())
 	if err != nil {
 		slog.Debug("could not create new layer from layer", "error", err)
 	}
-		}
-
-		// Fallback to creating layer from file copy (either NewLayerFromLayer failed, or digest empty/n != stat.Size())
-		if layer.Digest == "" {
-			layer, err = NewLayer(io.NewSectionReader(file, offset, n), mediatype)
-			if err != nil {
-				return nil, err
-			}
-		}
 
 	layers = append(layers, &layerGGML{layer, ggml})
-		offset = n
-	}
 
 	return detectChatTemplate(layers)
 }