Fix hardlink counting (#4042)

Signed-off-by: wusong <wangwusong@virtaitech.com>

Signed-off-by: wusong <wangwusong@virtaitech.com>
Co-authored-by: wusong <wangwusong@virtaitech.com>

weed/filer/filerstore_wrapper.go

@@ -2,13 +2,14 @@ package filer
 
 import (
 	"context"
-	"github.com/seaweedfs/seaweedfs/weed/glog"
-	"github.com/viant/ptrie"
 	"io"
 	"math"
 	"strings"
 	"time"
 
+	"github.com/seaweedfs/seaweedfs/weed/glog"
+	"github.com/viant/ptrie"
+
 	"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
 	"github.com/seaweedfs/seaweedfs/weed/stats"
 	"github.com/seaweedfs/seaweedfs/weed/util"
@@ -186,11 +187,14 @@ func (fsw *FilerStoreWrapper) DeleteEntry(ctx context.Context, fp util.FullPath)
 	}
 	if len(existingEntry.HardLinkId) != 0 {
 		// remove hard link
+		op := ctx.Value("OP")
+		if op != "MV" {
 			glog.V(4).Infof("DeleteHardLink %s", existingEntry.FullPath)
 			if err = fsw.DeleteHardLink(ctx, existingEntry.HardLinkId); err != nil {
 				return err
 			}
 		}
+	}
 
 	// glog.V(4).Infof("DeleteEntry %s", fp)
 	return actualStore.DeleteEntry(ctx, fp)
@@ -206,11 +210,14 @@ func (fsw *FilerStoreWrapper) DeleteOneEntry(ctx context.Context, existingEntry
 
 	if len(existingEntry.HardLinkId) != 0 {
 		// remove hard link
+		op := ctx.Value("OP")
+		if op != "MV" {
 			glog.V(4).Infof("DeleteHardLink %s", existingEntry.FullPath)
 			if err = fsw.DeleteHardLink(ctx, existingEntry.HardLinkId); err != nil {
 				return err
 			}
 		}
+	}
 
 	// glog.V(4).Infof("DeleteOneEntry %s", existingEntry.FullPath)
 	return actualStore.DeleteEntry(ctx, existingEntry.FullPath)

weed/mount/meta_cache/meta_cache.go

@@ -2,12 +2,13 @@ package meta_cache
 
 import (
 	"context"
+	"os"
+
 	"github.com/seaweedfs/seaweedfs/weed/filer"
 	"github.com/seaweedfs/seaweedfs/weed/filer/leveldb"
 	"github.com/seaweedfs/seaweedfs/weed/glog"
 	"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
 	"github.com/seaweedfs/seaweedfs/weed/util"
-	"os"
 )
 
 // need to have logic similar to FilerStoreWrapper
@@ -76,6 +77,7 @@ func (mc *MetaCache) AtomicUpdateEntryFromFiler(ctx context.Context, oldPath uti
 				// skip the unnecessary deletion
 				// leave the update to the following InsertEntry operation
 			} else {
+				ctx = context.WithValue(ctx, "OP", "MV")
 				glog.V(3).Infof("DeleteEntry %s", oldPath)
 				if err := mc.localStore.DeleteEntry(ctx, oldPath); err != nil {
 					return err

weed/server/filer_grpc_server_rename.go

@@ -202,6 +202,7 @@ func (fs *FilerServer) moveSelfEntry(ctx context.Context, stream filer_pb.Seawee
 	}
 
 	// delete old entry
+	ctx = context.WithValue(ctx, "OP", "MV")
 	deleteErr := fs.filer.DeleteEntryMetaAndData(ctx, oldPath, false, false, false, false, signatures)
 	if deleteErr != nil {
 		return deleteErr