diff --git a/commonfile/fileblockstore/fileblockstore.go b/commonfile/fileblockstore/fileblockstore.go
index 3f2e33af..99c89b20 100644
--- a/commonfile/fileblockstore/fileblockstore.go
+++ b/commonfile/fileblockstore/fileblockstore.go
@@ -21,6 +21,7 @@ type ctxKey uint
 
 const (
 	ctxKeySpaceId ctxKey = iota
+	ctxKeyFileId
 )
 
 type BlockStore interface {
@@ -48,3 +49,12 @@ func CtxGetSpaceId(ctx context.Context) (spaceId string) {
 	spaceId, _ = ctx.Value(ctxKeySpaceId).(string)
 	return
 }
+
+func CtxWithFileId(ctx context.Context, spaceId string) context.Context {
+	return context.WithValue(ctx, ctxKeyFileId, spaceId)
+}
+
+func CtxGetFileId(ctx context.Context) (spaceId string) {
+	spaceId, _ = ctx.Value(ctxKeyFileId).(string)
+	return
+}