added error return in type ListEachEntryFunc

weed/filer/abstract_sql/abstract_sql_store.go

@@ -326,7 +326,13 @@ func (store *AbstractSqlStore) ListDirectoryPrefixedEntries(ctx context.Context,
 			return lastFileName, fmt.Errorf("scan decode %s : %v", entry.FullPath, err)
 		}
 
-		if !eachEntryFunc(entry) {
+		resEachEntryFunc, resEachEntryFuncErr := eachEntryFunc(entry)
+		if resEachEntryFuncErr != nil {
+			err = fmt.Errorf("Failed in process eachEntryFnc: ", resEachEntryFuncErr)
+			break
+		}
+
+		if !resEachEntryFunc {
 			break
 		}
 

weed/filer/arangodb/arangodb_store.go

@@ -335,7 +335,13 @@ sort d.name asc
 			break
 		}
 
-		if !eachEntryFunc(entry) {
+		resEachEntryFunc, resEachEntryFuncErr := eachEntryFunc(entry)
+		if resEachEntryFuncErr != nil {
+			err = fmt.Errorf("Failed in process eachEntryFnc: ", resEachEntryFuncErr)
+			break
+		}
+
+		if !resEachEntryFunc {
 			break
 		}
 

weed/filer/cassandra/cassandra_store.go

@@ -206,12 +206,20 @@ func (store *CassandraStore) ListDirectoryEntries(ctx context.Context, dirPath u
 			glog.V(0).InfofCtx(ctx, "list %s : %v", entry.FullPath, err)
 			break
 		}
-		if !eachEntryFunc(entry) {
+
+		resEachEntryFunc, resEachEntryFuncErr := eachEntryFunc(entry)
+		if resEachEntryFuncErr != nil {
+			err = resEachEntryFuncErr
+			glog.V(0).Infof("Failed in process eachEntryFnc: %v", err)
+			break
+		}
+
+		if !resEachEntryFunc {
 			break
 		}
 	}
-	if err = iter.Close(); err != nil {
-		glog.V(0).InfofCtx(ctx, "list iterator close: %v", err)
+	if errClose := iter.Close(); errClose != nil {
+		glog.V(0).Infof("list iterator close: %v", errClose)
 	}
 
 	return lastFileName, err

weed/filer/cassandra2/cassandra_store.go

@@ -206,12 +206,21 @@ func (store *Cassandra2Store) ListDirectoryEntries(ctx context.Context, dirPath
 			glog.V(0).InfofCtx(ctx, "list %s : %v", entry.FullPath, err)
 			break
 		}
-		if !eachEntryFunc(entry) {
+
+		resEachEntryFunc, resEachEntryFuncErr := eachEntryFunc(entry)
+		if resEachEntryFuncErr != nil {
+			err = resEachEntryFuncErr
+			glog.V(0).Infof("Failed in process eachEntryFnc: %v", err)
+			break
+		}
+
+		if !resEachEntryFunc {
 			break
 		}
 	}
-	if err = iter.Close(); err != nil {
-		glog.V(0).InfofCtx(ctx, "list iterator close: %v", err)
+
+	if errClose := iter.Close(); errClose != nil {
+		glog.V(0).Infof("list iterator close: %v", errClose)
 	}
 
 	return lastFileName, err

weed/filer/etcd/etcd_store.go

@@ -9,7 +9,7 @@ import (
 
 	"go.etcd.io/etcd/client/pkg/v3/transport"
 
-	"go.etcd.io/etcd/client/v3"
+	clientv3 "go.etcd.io/etcd/client/v3"
 
 	"github.com/seaweedfs/seaweedfs/weed/filer"
 	"github.com/seaweedfs/seaweedfs/weed/glog"
@@ -212,9 +212,17 @@ func (store *EtcdStore) ListDirectoryPrefixedEntries(ctx context.Context, dirPat
 			glog.V(0).InfofCtx(ctx, "list %s : %v", entry.FullPath, err)
 			break
 		}
-		if !eachEntryFunc(entry) {
+
+		resEachEntryFunc, resEachEntryFuncErr := eachEntryFunc(entry)
+		if resEachEntryFuncErr != nil {
+			err = fmt.Errorf("Failed in process eachEntryFnc: ", resEachEntryFuncErr)
 			break
 		}
+
+		if !resEachEntryFunc {
+			break
+		}
+
 		lastFileName = fileName
 	}
 

weed/filer/filer.go

@@ -373,10 +373,11 @@ func (f *Filer) doListDirectoryEntries(ctx context.Context, p util.FullPath, sta
 	var s3ExpiredEntries []*Entry
 	var hasValidEntries bool
 
-	lastFileName, err = f.Store.ListDirectoryPrefixedEntries(ctx, p, startFileName, inclusive, limit, prefix, func(entry *Entry) bool {
+	lastFileName, err = f.Store.ListDirectoryPrefixedEntries(ctx, p, startFileName, inclusive, limit, prefix, func(entry *Entry) (bool, error) {
 		select {
 		case <-ctx.Done():
-			return false
+			glog.Errorf("Context is done.")
+			return false, fmt.Errorf("Context is done. Error : %s", ctx.Err())
 		default:
 			if entry.TtlSec > 0 {
 				if entry.IsExpireS3Enabled() {
@@ -384,13 +385,13 @@ func (f *Filer) doListDirectoryEntries(ctx context.Context, p util.FullPath, sta
 						// Collect for deletion after iteration completes to avoid DB deadlock
 						s3ExpiredEntries = append(s3ExpiredEntries, entry)
 						expiredCount++
-						return true
+						return true, nil
 					}
 				} else if entry.Crtime.Add(time.Duration(entry.TtlSec) * time.Second).Before(time.Now()) {
 					// Collect for deletion after iteration completes to avoid DB deadlock
 					expiredEntries = append(expiredEntries, entry)
 					expiredCount++
-					return true
+					return true, nil
 				}
 			}
 			// Track that we found at least one valid (non-expired) entry
@@ -500,9 +501,9 @@ func (f *Filer) DeleteEmptyParentDirectories(ctx context.Context, dirPath util.F
 // IsDirectoryEmpty checks if a directory contains any entries
 func (f *Filer) IsDirectoryEmpty(ctx context.Context, dirPath util.FullPath) (bool, error) {
 	isEmpty := true
-	_, err := f.Store.ListDirectoryPrefixedEntries(ctx, dirPath, "", true, 1, "", func(entry *Entry) bool {
+	_, err := f.Store.ListDirectoryPrefixedEntries(ctx, dirPath, "", true, 1, "", func(entry *Entry) (bool, error) {
 		isEmpty = false
-		return false // Stop after first entry
+		return false, nil // Stop after first entry
 	})
 	return isEmpty, err
 }

weed/filer/filer_search.go

@@ -2,10 +2,11 @@ package filer
 
 import (
 	"context"
-	"github.com/seaweedfs/seaweedfs/weed/util"
 	"math"
 	"path/filepath"
 	"strings"
+
+	"github.com/seaweedfs/seaweedfs/weed/util"
 )
 
 func splitPattern(pattern string) (prefix string, restPattern string) {
@@ -27,9 +28,9 @@ func (f *Filer) ListDirectoryEntries(ctx context.Context, p util.FullPath, start
 		limit = math.MaxInt32 - 1
 	}
 
-	_, err = f.StreamListDirectoryEntries(ctx, p, startFileName, inclusive, limit+1, prefix, namePattern, namePatternExclude, func(entry *Entry) bool {
+	_, err = f.StreamListDirectoryEntries(ctx, p, startFileName, inclusive, limit+1, prefix, namePattern, namePatternExclude, func(entry *Entry) (bool, error) {
 		entries = append(entries, entry)
-		return true
+		return true, nil
 	})
 
 	hasMore = int64(len(entries)) >= limit+1
@@ -68,24 +69,32 @@ func (f *Filer) doListPatternMatchedEntries(ctx context.Context, p util.FullPath
 		return 0, lastFileName, err
 	}
 
-	lastFileName, err = f.doListValidEntries(ctx, p, startFileName, inclusive, limit, prefix, func(entry *Entry) bool {
+	lastFileName, err = f.doListValidEntries(ctx, p, startFileName, inclusive, limit, prefix, func(entry *Entry) (bool, error) {
 		nameToTest := entry.Name()
 		if len(namePatternExclude) > 0 {
 			if matched, matchErr := filepath.Match(namePatternExclude, nameToTest); matchErr == nil && matched {
 				missedCount++
-				return true
+				return true, nil
 			}
 		}
 		if len(restNamePattern) > 0 {
 			if matched, matchErr := filepath.Match(restNamePattern, nameToTest[len(prefix):]); matchErr == nil && !matched {
 				missedCount++
-				return true
+				return true, nil
 			}
 		}
-		if !eachEntryFunc(entry) {
-			return false
+
+		res, resErr := eachEntryFunc(entry)
+
+		if resErr != nil {
+			return false, resErr
+		}
+
+		if !res {
+			return false, nil
 		}
-		return true
+
+		return true, nil
 	})
 	if err != nil {
 		return

weed/filer/filerstore.go

@@ -3,8 +3,9 @@ package filer
 import (
 	"context"
 	"errors"
-	"github.com/seaweedfs/seaweedfs/weed/util"
 	"io"
+
+	"github.com/seaweedfs/seaweedfs/weed/util"
 )
 
 const CountEntryChunksForGzip = 50
@@ -16,7 +17,7 @@ var (
 	ErrKvNotFound                            = errors.New("kv: not found")
 )
 
-type ListEachEntryFunc func(entry *Entry) bool
+type ListEachEntryFunc func(entry *Entry) (bool, error)
 
 type FilerStore interface {
 	// GetName gets the name to locate the configuration in filer.toml file

weed/filer/filerstore_translate_path.go

@@ -2,9 +2,10 @@ package filer
 
 import (
 	"context"
-	"github.com/seaweedfs/seaweedfs/weed/util"
 	"math"
 	"strings"
+
+	"github.com/seaweedfs/seaweedfs/weed/util"
 )
 
 var (
@@ -111,7 +112,7 @@ func (t *FilerStorePathTranslator) ListDirectoryEntries(ctx context.Context, dir
 
 	newFullPath := t.translatePath(dirPath)
 
-	return t.actualStore.ListDirectoryEntries(ctx, newFullPath, startFileName, includeStartFile, limit, func(entry *Entry) bool {
+	return t.actualStore.ListDirectoryEntries(ctx, newFullPath, startFileName, includeStartFile, limit, func(entry *Entry) (bool, error) {
 		entry.FullPath = dirPath[:len(t.storeRoot)-1] + entry.FullPath
 		return eachEntryFunc(entry)
 	})
@@ -125,7 +126,7 @@ func (t *FilerStorePathTranslator) ListDirectoryPrefixedEntries(ctx context.Cont
 		limit = math.MaxInt32 - 1
 	}
 
-	return t.actualStore.ListDirectoryPrefixedEntries(ctx, newFullPath, startFileName, includeStartFile, limit, prefix, func(entry *Entry) bool {
+	return t.actualStore.ListDirectoryPrefixedEntries(ctx, newFullPath, startFileName, includeStartFile, limit, prefix, func(entry *Entry) (bool, error) {
 		entry.FullPath = dirPath[:len(t.storeRoot)-1] + entry.FullPath
 		return eachEntryFunc(entry)
 	})

weed/filer/filerstore_wrapper.go

@@ -2,6 +2,7 @@ package filer
 
 import (
 	"context"
+	"fmt"
 	"io"
 	"math"
 	"strings"
@@ -254,7 +255,7 @@ func (fsw *FilerStoreWrapper) ListDirectoryEntries(ctx context.Context, dirPath
 	}()
 
 	// glog.V(4).Infof("ListDirectoryEntries %s from %s limit %d", dirPath, startFileName, limit)
-	return actualStore.ListDirectoryEntries(ctx, dirPath, startFileName, includeStartFile, limit, func(entry *Entry) bool {
+	return actualStore.ListDirectoryEntries(ctx, dirPath, startFileName, includeStartFile, limit, func(entry *Entry) (bool, error) {
 		fsw.maybeReadHardLink(ctx, entry)
 		filer_pb.AfterEntryDeserialization(entry.GetChunks())
 		return eachEntryFunc(entry)
@@ -273,7 +274,7 @@ func (fsw *FilerStoreWrapper) ListDirectoryPrefixedEntries(ctx context.Context,
 		limit = math.MaxInt32 - 1
 	}
 	// glog.V(4).Infof("ListDirectoryPrefixedEntries %s from %s prefix %s limit %d", dirPath, startFileName, prefix, limit)
-	adjustedEntryFunc := func(entry *Entry) bool {
+	adjustedEntryFunc := func(entry *Entry) (bool, error) {
 		fsw.maybeReadHardLink(ctx, entry)
 		filer_pb.AfterEntryDeserialization(entry.GetChunks())
 		return eachEntryFunc(entry)
@@ -293,9 +294,9 @@ func (fsw *FilerStoreWrapper) prefixFilterEntries(ctx context.Context, dirPath u
 	}
 
 	var notPrefixed []*Entry
-	lastFileName, err = actualStore.ListDirectoryEntries(ctx, dirPath, startFileName, includeStartFile, limit, func(entry *Entry) bool {
+	lastFileName, err = actualStore.ListDirectoryEntries(ctx, dirPath, startFileName, includeStartFile, limit, func(entry *Entry) (bool, error) {
 		notPrefixed = append(notPrefixed, entry)
-		return true
+		return true, nil
 	})
 	if err != nil {
 		return
@@ -306,7 +307,14 @@ func (fsw *FilerStoreWrapper) prefixFilterEntries(ctx context.Context, dirPath u
 		for _, entry := range notPrefixed {
 			if strings.HasPrefix(entry.Name(), prefix) {
 				count++
-				if !eachEntryFunc(entry) {
+				res, resErr := eachEntryFunc(entry)
+
+				if resErr != nil {
+					err = fmt.Errorf("Failed in process eachEntryFnc: ", resErr)
+					return
+				}
+
+				if !res {
 					return
 				}
 				if count >= limit {
@@ -316,9 +324,9 @@ func (fsw *FilerStoreWrapper) prefixFilterEntries(ctx context.Context, dirPath u
 		}
 		if count < limit && lastFileName < prefix {
 			notPrefixed = notPrefixed[:0]
-			lastFileName, err = actualStore.ListDirectoryEntries(ctx, dirPath, lastFileName, false, limit, func(entry *Entry) bool {
+			lastFileName, err = actualStore.ListDirectoryEntries(ctx, dirPath, lastFileName, false, limit, func(entry *Entry) (bool, error) {
 				notPrefixed = append(notPrefixed, entry)
-				return true
+				return true, nil
 			})
 			if err != nil {
 				return

weed/filer/hbase/hbase_store.go

@@ -4,13 +4,14 @@ import (
 	"bytes"
 	"context"
 	"fmt"
+	"io"
+
 	"github.com/seaweedfs/seaweedfs/weed/filer"
 	"github.com/seaweedfs/seaweedfs/weed/glog"
 	"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
 	"github.com/seaweedfs/seaweedfs/weed/util"
 	"github.com/tsuna/gohbase"
 	"github.com/tsuna/gohbase/hrpc"
-	"io"
 )
 
 func init() {
@@ -206,7 +207,14 @@ func (store *HbaseStore) ListDirectoryPrefixedEntries(ctx context.Context, dirPa
 			glog.V(0).InfofCtx(ctx, "list %s : %v", entry.FullPath, err)
 			break
 		}
-		if !eachEntryFunc(entry) {
+
+		resEachEntryFunc, resEachEntryFuncErr := eachEntryFunc(entry)
+		if resEachEntryFuncErr != nil {
+			err = fmt.Errorf("Failed in process eachEntryFnc: ", resEachEntryFuncErr)
+			break
+		}
+
+		if !resEachEntryFunc {
 			break
 		}
 	}

weed/filer/leveldb/leveldb_store.go

@@ -209,7 +209,14 @@ func (store *LevelDBStore) ListDirectoryPrefixedEntries(ctx context.Context, dir
 			glog.V(0).InfofCtx(ctx, "list %s : %v", entry.FullPath, err)
 			break
 		}
-		if !eachEntryFunc(entry) {
+
+		resEachEntryFunc, resEachEntryFuncErr := eachEntryFunc(entry)
+		if resEachEntryFuncErr != nil {
+			err = fmt.Errorf("Failed in process eachEntryFnc: ", resEachEntryFuncErr)
+			break
+		}
+
+		if !resEachEntryFunc {
 			break
 		}
 	}

weed/filer/leveldb2/leveldb2_store.go

@@ -216,7 +216,14 @@ func (store *LevelDB2Store) ListDirectoryPrefixedEntries(ctx context.Context, di
 			glog.V(0).InfofCtx(ctx, "list %s : %v", entry.FullPath, err)
 			break
 		}
-		if !eachEntryFunc(entry) {
+
+		resEachEntryFunc, resEachEntryFuncErr := eachEntryFunc(entry)
+		if resEachEntryFuncErr != nil {
+			err = fmt.Errorf("Failed in process eachEntryFnc: ", resEachEntryFuncErr)
+			break
+		}
+
+		if !resEachEntryFunc {
 			break
 		}
 	}

weed/filer/leveldb3/leveldb3_store.go

@@ -345,7 +345,14 @@ func (store *LevelDB3Store) ListDirectoryPrefixedEntries(ctx context.Context, di
 			glog.V(0).InfofCtx(ctx, "list %s : %v", entry.FullPath, err)
 			break
 		}
-		if !eachEntryFunc(entry) {
+
+		resEachEntryFunc, resEachEntryFuncErr := eachEntryFunc(entry)
+		if resEachEntryFuncErr != nil {
+			err = fmt.Errorf("Failed in process eachEntryFnc: ", resEachEntryFuncErr)
+			break
+		}
+
+		if !resEachEntryFunc {
 			break
 		}
 	}

weed/filer/mongodb/mongodb_store.go

@@ -319,10 +319,15 @@ func (store *MongodbStore) ListDirectoryPrefixedEntries(ctx context.Context, dir
 			break
 		}
 
-		if !eachEntryFunc(entry) {
+		resEachEntryFunc, resEachEntryFuncErr := eachEntryFunc(entry)
+		if resEachEntryFuncErr != nil {
+			err = fmt.Errorf("Failed in process eachEntryFnc: ", resEachEntryFuncErr)
 			break
 		}
 
+		if !resEachEntryFunc {
+			break
+		}
 	}
 
 	if err := cur.Close(ctx); err != nil {

weed/filer/redis/universal_redis_store.go

@@ -191,7 +191,14 @@ func (store *UniversalRedisStore) ListDirectoryEntries(ctx context.Context, dirP
 					continue
 				}
 			}
-			if !eachEntryFunc(entry) {
+
+			resEachEntryFunc, resEachEntryFuncErr := eachEntryFunc(entry)
+			if resEachEntryFuncErr != nil {
+				err = fmt.Errorf("Failed in process eachEntryFnc: ", resEachEntryFuncErr)
+				break
+			}
+
+			if !resEachEntryFunc {
 				break
 			}
 		}

weed/filer/redis2/universal_redis_store.go

@@ -206,7 +206,14 @@ func (store *UniversalRedis2Store) ListDirectoryEntries(ctx context.Context, dir
 					continue
 				}
 			}
-			if !eachEntryFunc(entry) {
+
+			resEachEntryFunc, resEachEntryFuncErr := eachEntryFunc(entry)
+			if resEachEntryFuncErr != nil {
+				err = fmt.Errorf("Failed in process eachEntryFnc: ", resEachEntryFuncErr)
+				break
+			}
+
+			if !resEachEntryFunc {
 				break
 			}
 		}

weed/filer/redis3/universal_redis_store.go

@@ -164,9 +164,16 @@ func (store *UniversalRedis3Store) ListDirectoryEntries(ctx context.Context, dir
 				}
 			}
 			counter++
-			if !eachEntryFunc(entry) {
+
+			resEachEntryFunc, resEachEntryFuncErr := eachEntryFunc(entry)
+			if resEachEntryFuncErr != nil {
+				err = fmt.Errorf("Failed in process eachEntryFnc: ", resEachEntryFuncErr)
+			}
+
+			if !resEachEntryFunc {
 				return false
 			}
+
 			if counter >= limit {
 				return false
 			}

weed/filer/redis_lua/universal_redis_store.go

@@ -173,7 +173,14 @@ func (store *UniversalRedisLuaStore) ListDirectoryEntries(ctx context.Context, d
 					continue
 				}
 			}
-			if !eachEntryFunc(entry) {
+
+			resEachEntryFunc, resEachEntryFuncErr := eachEntryFunc(entry)
+			if resEachEntryFuncErr != nil {
+				err = fmt.Errorf("Failed in process eachEntryFnc: ", resEachEntryFuncErr)
+				break
+			}
+
+			if !resEachEntryFunc {
 				break
 			}
 		}

weed/filer/store_test/test_suite.go

@@ -3,11 +3,12 @@ package store_test
 import (
 	"context"
 	"fmt"
+	"os"
+	"testing"
+
 	"github.com/seaweedfs/seaweedfs/weed/filer"
 	"github.com/seaweedfs/seaweedfs/weed/util"
 	"github.com/stretchr/testify/assert"
-	"os"
-	"testing"
 )
 
 func TestFilerStore(t *testing.T, store filer.FilerStore) {
@@ -23,16 +24,16 @@ func TestFilerStore(t *testing.T, store filer.FilerStore) {
 
 	{
 		var counter int
-		lastFileName, err := store.ListDirectoryEntries(ctx, util.FullPath("/a/b/c"), "", false, 3, func(entry *filer.Entry) bool {
+		lastFileName, err := store.ListDirectoryEntries(ctx, util.FullPath("/a/b/c"), "", false, 3, func(entry *filer.Entry) (bool, error) {
 			counter++
-			return true
+			return true, nil
 		})
 		assert.Nil(t, err, "list directory")
 		assert.Equal(t, 3, counter, "directory list counter")
 		assert.Equal(t, "f00002", lastFileName, "directory list last file")
-		lastFileName, err = store.ListDirectoryEntries(ctx, util.FullPath("/a/b/c"), lastFileName, false, 1024, func(entry *filer.Entry) bool {
+		lastFileName, err = store.ListDirectoryEntries(ctx, util.FullPath("/a/b/c"), lastFileName, false, 1024, func(entry *filer.Entry) (bool, error) {
 			counter++
-			return true
+			return true, nil
 		})
 		assert.Nil(t, err, "list directory")
 		assert.Equal(t, 1027, counter, "directory list counter")

weed/mount/meta_cache/meta_cache.go

@@ -146,9 +146,9 @@ func (mc *MetaCache) ListDirectoryEntries(ctx context.Context, dirPath util.Full
 		glog.Warningf("unsynchronized dir: %v", dirPath)
 	}
 
-	_, err := mc.localStore.ListDirectoryEntries(ctx, dirPath, startFileName, includeStartFile, limit, func(entry *filer.Entry) bool {
+	_, err := mc.localStore.ListDirectoryEntries(ctx, dirPath, startFileName, includeStartFile, limit, func(entry *filer.Entry) (bool, error) {
 		if entry.TtlSec > 0 && entry.Crtime.Add(time.Duration(entry.TtlSec)*time.Second).Before(time.Now()) {
-			return true
+			return true, nil
 		}
 		mc.mapIdFromFilerToLocal(entry)
 		return eachEntryFunc(entry)

weed/mount/weedfs_dir_read.go

@@ -2,13 +2,14 @@ package mount
 
 import (
 	"context"
+	"math"
+	"sync"
+
 	"github.com/hanwen/go-fuse/v2/fuse"
 	"github.com/seaweedfs/seaweedfs/weed/filer"
 	"github.com/seaweedfs/seaweedfs/weed/glog"
 	"github.com/seaweedfs/seaweedfs/weed/mount/meta_cache"
 	"github.com/seaweedfs/seaweedfs/weed/util"
-	"math"
-	"sync"
 )
 
 type DirectoryHandleId uint64
@@ -153,7 +154,7 @@ func (wfs *WFS) doReadDirectory(input *fuse.ReadIn, out *fuse.DirEntryList, isPl
 	}
 
 	var dirEntry fuse.DirEntry
-	processEachEntryFn := func(entry *filer.Entry) bool {
+	processEachEntryFn := func(entry *filer.Entry) (bool, error) {
 		dirEntry.Name = entry.Name()
 		dirEntry.Mode = toSyscallMode(entry.Mode)
 		inode := wfs.inodeToPath.Lookup(dirPath.Child(dirEntry.Name), entry.Crtime.Unix(), entry.IsDirectory(), len(entry.HardLinkId) > 0, entry.Inode, isPlusMode)
@@ -161,13 +162,13 @@ func (wfs *WFS) doReadDirectory(input *fuse.ReadIn, out *fuse.DirEntryList, isPl
 		if !isPlusMode {
 			if !out.AddDirEntry(dirEntry) {
 				isEarlyTerminated = true
-				return false
+				return false, nil
 			}
 		} else {
 			entryOut := out.AddDirLookupEntry(dirEntry)
 			if entryOut == nil {
 				isEarlyTerminated = true
-				return false
+				return false, nil
 			}
 			if fh, found := wfs.fhMap.FindFileHandle(inode); found {
 				glog.V(4).Infof("readdir opened file %s", dirPath.Child(dirEntry.Name))
@@ -175,7 +176,7 @@ func (wfs *WFS) doReadDirectory(input *fuse.ReadIn, out *fuse.DirEntryList, isPl
 			}
 			wfs.outputFilerEntry(entryOut, inode, entry)
 		}
-		return true
+		return true, nil
 	}
 
 	if input.Offset < directoryStreamBaseOffset {
@@ -206,7 +207,7 @@ func (wfs *WFS) doReadDirectory(input *fuse.ReadIn, out *fuse.DirEntryList, isPl
 		entryCurrentIndex := input.Offset - dh.entryStreamOffset
 		for uint64(len(dh.entryStream)) > entryCurrentIndex {
 			entry := dh.entryStream[entryCurrentIndex]
-			if processEachEntryFn(entry) {
+			if process, _ := processEachEntryFn(entry); process {
 				lastEntryName = entry.Name()
 				entryCurrentIndex++
 			} else {
@@ -221,7 +222,7 @@ func (wfs *WFS) doReadDirectory(input *fuse.ReadIn, out *fuse.DirEntryList, isPl
 		glog.Errorf("dir ReadDirAll %s: %v", dirPath, err)
 		return fuse.EIO
 	}
-	listErr := wfs.metaCache.ListDirectoryEntries(context.Background(), dirPath, lastEntryName, false, int64(math.MaxInt32), func(entry *filer.Entry) bool {
+	listErr := wfs.metaCache.ListDirectoryEntries(context.Background(), dirPath, lastEntryName, false, int64(math.MaxInt32), func(entry *filer.Entry) (bool, error) {
 		dh.entryStream = append(dh.entryStream, entry)
 		return processEachEntryFn(entry)
 	})

weed/server/filer_grpc_server.go

@@ -56,19 +56,19 @@ func (fs *FilerServer) ListEntries(req *filer_pb.ListEntriesRequest, stream file
 	var listErr error
 	for limit > 0 {
 		var hasEntries bool
-		lastFileName, listErr = fs.filer.StreamListDirectoryEntries(stream.Context(), util.FullPath(req.Directory), lastFileName, includeLastFile, int64(paginationLimit), req.Prefix, "", "", func(entry *filer.Entry) bool {
+		lastFileName, listErr = fs.filer.StreamListDirectoryEntries(stream.Context(), util.FullPath(req.Directory), lastFileName, includeLastFile, int64(paginationLimit), req.Prefix, "", "", func(entry *filer.Entry) (bool, error) {
 			hasEntries = true
 			if err = stream.Send(&filer_pb.ListEntriesResponse{
 				Entry: entry.ToProtoEntry(),
 			}); err != nil {
-				return false
+				return false, err
 			}
 
 			limit--
 			if limit == 0 {
-				return false
+				return false, nil
 			}
-			return true
+			return true, nil
 		})
 
 		if listErr != nil {

weed/server/filer_grpc_server_traverse_meta.go

@@ -3,6 +3,7 @@ package weed_server
 import (
 	"context"
 	"fmt"
+
 	"github.com/seaweedfs/seaweedfs/weed/filer"
 	"github.com/seaweedfs/seaweedfs/weed/glog"
 	"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
@@ -63,13 +64,13 @@ func (fs *FilerServer) iterateDirectory(ctx context.Context, dirPath util.FullPa
 	var listErr error
 	for {
 		var hasEntries bool
-		lastFileName, listErr = fs.filer.StreamListDirectoryEntries(ctx, dirPath, lastFileName, false, 1024, "", "", "", func(entry *filer.Entry) bool {
+		lastFileName, listErr = fs.filer.StreamListDirectoryEntries(ctx, dirPath, lastFileName, false, 1024, "", "", "", func(entry *filer.Entry) (bool, error) {
 			hasEntries = true
 			if fnErr := fn(entry); fnErr != nil {
 				err = fnErr
-				return false
+				return false, err
 			}
-			return true
+			return true, nil
 		})
 		if listErr != nil {
 			return listErr