rename: delete source entry metadata only, skipping hard links

weed/filer/filer_delete_entry.go

@@ -125,7 +125,11 @@ func (f *Filer) doDeleteEntryMetaAndData(ctx context.Context, entry *Entry, shou
 
 	glog.V(3).Infof("deleting entry %v, delete chunks: %v", entry.FullPath, shouldDeleteChunks)
 
-	if storeDeletionErr := f.Store.DeleteOneEntry(ctx, entry); storeDeletionErr != nil {
+	if !entry.IsDirectory() && !shouldDeleteChunks {
+		if storeDeletionErr := f.Store.DeleteOneEntrySkipHardlink(ctx, entry.FullPath); storeDeletionErr != nil {
+			return fmt.Errorf("filer store delete skip hardlink: %v", storeDeletionErr)
+		}
+	} else if storeDeletionErr := f.Store.DeleteOneEntry(ctx, entry); storeDeletionErr != nil {
 		return fmt.Errorf("filer store delete: %v", storeDeletionErr)
 	}
 	if !entry.IsDirectory() {

weed/filer/filerstore_wrapper.go

@@ -23,6 +23,7 @@ type VirtualFilerStore interface {
 	FilerStore
 	DeleteHardLink(ctx context.Context, hardLinkId HardLinkId) error
 	DeleteOneEntry(ctx context.Context, entry *Entry) error
+	DeleteOneEntrySkipHardlink(ctx context.Context, fullpath util.FullPath) error
 	AddPathSpecificStore(path string, storeId string, store FilerStore)
 	OnBucketCreation(bucket string)
 	OnBucketDeletion(bucket string)
@@ -216,6 +217,18 @@ func (fsw *FilerStoreWrapper) DeleteOneEntry(ctx context.Context, existingEntry
 	return actualStore.DeleteEntry(ctx, existingEntry.FullPath)
 }
 
+func (fsw *FilerStoreWrapper) DeleteOneEntrySkipHardlink(ctx context.Context, fullpath util.FullPath) (err error) {
+	actualStore := fsw.getActualStore(fullpath)
+	stats.FilerStoreCounter.WithLabelValues(actualStore.GetName(), "delete").Inc()
+	start := time.Now()
+	defer func() {
+		stats.FilerStoreHistogram.WithLabelValues(actualStore.GetName(), "delete").Observe(time.Since(start).Seconds())
+	}()
+
+	glog.V(4).Infof("DeleteOneEntrySkipHardlink %s", fullpath)
+	return actualStore.DeleteEntry(ctx, fullpath)
+}
+
 func (fsw *FilerStoreWrapper) DeleteFolderChildren(ctx context.Context, fp util.FullPath) (err error) {
 	actualStore := fsw.getActualStore(fp + "/")
 	stats.FilerStoreCounter.WithLabelValues(actualStore.GetName(), "deleteFolderChildren").Inc()

weed/mount/meta_cache/meta_cache.go

@@ -62,7 +62,7 @@ func (mc *MetaCache) doInsertEntry(ctx context.Context, entry *filer.Entry) erro
 	return mc.localStore.InsertEntry(ctx, entry)
 }
 
-func (mc *MetaCache) AtomicUpdateEntryFromFiler(ctx context.Context, oldPath util.FullPath, newEntry *filer.Entry) error {
+func (mc *MetaCache) AtomicUpdateEntryFromFiler(ctx context.Context, oldPath util.FullPath, newEntry *filer.Entry, shouldDeleteChunks bool) error {
 	//mc.Lock()
 	//defer mc.Unlock()
 
@@ -74,8 +74,14 @@ func (mc *MetaCache) AtomicUpdateEntryFromFiler(ctx context.Context, oldPath uti
 				// leave the update to the following InsertEntry operation
 			} else {
 				glog.V(3).Infof("DeleteEntry %s", oldPath)
-				if err := mc.localStore.DeleteEntry(ctx, oldPath); err != nil {
+				if shouldDeleteChunks {
-					return err
+					if err := mc.localStore.DeleteEntry(ctx, oldPath); err != nil {
+						return err
+					}
+				} else {
+					if err := mc.localStore.DeleteOneEntrySkipHardlink(ctx, oldPath); err != nil {
+						return err
+					}
 				}
 			}
 		}
@@ -112,6 +118,12 @@ func (mc *MetaCache) FindEntry(ctx context.Context, fp util.FullPath) (entry *fi
 	return
 }
 
+func (mc *MetaCache) DeleteEntrySkipHardlink(ctx context.Context, fp util.FullPath) (err error) {
+	//mc.Lock()
+	//defer mc.Unlock()
+	return mc.localStore.DeleteOneEntrySkipHardlink(ctx, fp)
+}
+
 func (mc *MetaCache) DeleteEntry(ctx context.Context, fp util.FullPath) (err error) {
 	//mc.Lock()
 	//defer mc.Unlock()

weed/mount/meta_cache/meta_cache_subscribe.go

@@ -36,7 +36,7 @@ func SubscribeMetaEvents(mc *MetaCache, selfSignature int32, client filer_pb.Fil
 			glog.V(4).Infof("creating %v", key)
 			newEntry = filer.FromPbEntry(dir, message.NewEntry)
 		}
-		err := mc.AtomicUpdateEntryFromFiler(context.Background(), oldPath, newEntry)
+		err := mc.AtomicUpdateEntryFromFiler(context.Background(), oldPath, newEntry, message.DeleteChunks)
 		if err == nil {
 			if message.OldEntry != nil && message.NewEntry != nil {
 				oldKey := util.NewFullPath(resp.Directory, message.OldEntry.Name)

weed/mount/weedfs_rename.go

@@ -217,7 +217,7 @@ func (wfs *WFS) handleRenameResponse(ctx context.Context, resp *filer_pb.StreamR
 	if resp.EventNotification.NewEntry != nil {
 		// with new entry, the old entry name also exists. This is the first step to create new entry
 		newEntry := filer.FromPbEntry(resp.EventNotification.NewParentPath, resp.EventNotification.NewEntry)
-		if err := wfs.metaCache.AtomicUpdateEntryFromFiler(ctx, "", newEntry); err != nil {
+		if err := wfs.metaCache.AtomicUpdateEntryFromFiler(ctx, "", newEntry, false); err != nil {
 			return err
 		}
 
@@ -231,7 +231,7 @@ func (wfs *WFS) handleRenameResponse(ctx context.Context, resp *filer_pb.StreamR
 
 	} else if resp.EventNotification.OldEntry != nil {
 		// without new entry, only old entry name exists. This is the second step to delete old entry
-		if err := wfs.metaCache.AtomicUpdateEntryFromFiler(ctx, util.NewFullPath(resp.Directory, resp.EventNotification.OldEntry.Name), nil); err != nil {
+		if err := wfs.metaCache.AtomicUpdateEntryFromFiler(ctx, util.NewFullPath(resp.Directory, resp.EventNotification.OldEntry.Name), nil, resp.EventNotification.DeleteChunks); err != nil {
 			return err
 		}
 	}