diff --git a/weed/mount/weedfs.go b/weed/mount/weedfs.go
index 3ad938699..6a1081113 100644
--- a/weed/mount/weedfs.go
+++ b/weed/mount/weedfs.go
@@ -2,6 +2,7 @@ package mount
 
 import (
 	"context"
+	"errors"
 	"math/rand"
 	"os"
 	"path"
@@ -76,8 +77,8 @@ type WFS struct {
 	signature         int32
 	concurrentWriters *util.LimitedConcurrentExecutor
 	inodeToPath       *InodeToPath
-	fhmap             *FileHandleToInode
-	dhmap             *DirectoryHandleToInode
+	fhMap             *FileHandleToInode
+	dhMap             *DirectoryHandleToInode
 	fuseServer        *fuse.Server
 	IsOverQuota       bool
 	fhLockTable       *util.LockTable[FileHandleId]
@@ -89,8 +90,8 @@ func NewSeaweedFileSystem(option *Option) *WFS {
 		option:        option,
 		signature:     util.RandomInt32(),
 		inodeToPath:   NewInodeToPath(util.FullPath(option.FilerMountRootPath)),
-		fhmap:         NewFileHandleToInode(),
-		dhmap:         NewDirectoryHandleToInode(),
+		fhMap:         NewFileHandleToInode(),
+		dhMap:         NewDirectoryHandleToInode(),
 		fhLockTable:   util.NewLockTable[FileHandleId](),
 	}
 
@@ -108,9 +109,9 @@ func NewSeaweedFileSystem(option *Option) *WFS {
 			return wfs.inodeToPath.IsChildrenCached(path)
 		}, func(filePath util.FullPath, entry *filer_pb.Entry) {
 			// Find inode if it is not a deleted path
-			if inode, inode_found := wfs.inodeToPath.GetInode(filePath); inode_found {
+			if inode, inodeFound := wfs.inodeToPath.GetInode(filePath); inodeFound {
 				// Find open file handle
-				if fh, fh_found := wfs.fhmap.FindFileHandle(inode); fh_found {
+				if fh, fhFound := wfs.fhMap.FindFileHandle(inode); fhFound {
 					fhActiveLock := fh.wfs.fhLockTable.AcquireLock("invalidateFunc", fh.fh, util.ExclusiveLock)
 					defer fh.wfs.fhLockTable.ReleaseLock(fh.fh, fhActiveLock)
 
@@ -119,10 +120,10 @@ func NewSeaweedFileSystem(option *Option) *WFS {
 					fh.dirtyPages = newPageWriter(fh, wfs.option.ChunkSizeLimit)
 
 					// Update handle entry
-					newentry, status := wfs.maybeLoadEntry(filePath)
+					newEntry, status := wfs.maybeLoadEntry(filePath)
 					if status == fuse.OK {
-						if fh.GetEntry().GetEntry() != newentry {
-							fh.SetEntry(newentry)
+						if fh.GetEntry().GetEntry() != newEntry {
+							fh.SetEntry(newEntry)
 						}
 					}
 				}
@@ -160,7 +161,7 @@ func (wfs *WFS) maybeReadEntry(inode uint64) (path util.FullPath, fh *FileHandle
 		return
 	}
 	var found bool
-	if fh, found = wfs.fhmap.FindFileHandle(inode); found {
+	if fh, found = wfs.fhMap.FindFileHandle(inode); found {
 		entry = fh.UpdateEntry(func(entry *filer_pb.Entry) {
 			if entry != nil && fh.entry.Attributes == nil {
 				entry.Attributes = &filer_pb.FuseAttributes{}
@@ -195,7 +196,7 @@ func (wfs *WFS) maybeLoadEntry(fullpath util.FullPath) (*filer_pb.Entry, fuse.St
 	// read from async meta cache
 	meta_cache.EnsureVisited(wfs.metaCache, wfs, util.FullPath(dir))
 	cachedEntry, cacheErr := wfs.metaCache.FindEntry(context.Background(), fullpath)
-	if cacheErr == filer_pb.ErrNotFound {
+	if errors.Is(cacheErr, filer_pb.ErrNotFound) {
 		return nil, fuse.ENOENT
 	}
 	return cachedEntry.ToProtoEntry(), fuse.OK
diff --git a/weed/mount/weedfs_attr.go b/weed/mount/weedfs_attr.go
index c389e0627..24da292d6 100644
--- a/weed/mount/weedfs_attr.go
+++ b/weed/mount/weedfs_attr.go
@@ -23,7 +23,7 @@ func (wfs *WFS) GetAttr(cancel <-chan struct{}, input *fuse.GetAttrIn, out *fuse
 		wfs.setAttrByPbEntry(&out.Attr, inode, entry, true)
 		return status
 	} else {
-		if fh, found := wfs.fhmap.FindFileHandle(inode); found {
+		if fh, found := wfs.fhMap.FindFileHandle(inode); found {
 			out.AttrValid = 1
 			wfs.setAttrByPbEntry(&out.Attr, inode, fh.entry.GetEntry(), true)
 			out.Nlink = 0
diff --git a/weed/mount/weedfs_dir_lookup.go b/weed/mount/weedfs_dir_lookup.go
index f3ba0cc85..7fc10ef28 100644
--- a/weed/mount/weedfs_dir_lookup.go
+++ b/weed/mount/weedfs_dir_lookup.go
@@ -57,7 +57,7 @@ func (wfs *WFS) Lookup(cancel <-chan struct{}, header *fuse.InHeader, name strin
 
 	inode := wfs.inodeToPath.Lookup(fullFilePath, localEntry.Crtime.Unix(), localEntry.IsDirectory(), len(localEntry.HardLinkId) > 0, localEntry.Inode, true)
 
-	if fh, found := wfs.fhmap.FindFileHandle(inode); found {
+	if fh, found := wfs.fhMap.FindFileHandle(inode); found {
 		fh.entryLock.RLock()
 		if entry := fh.GetEntry().GetEntry(); entry != nil {
 			glog.V(4).Infof("lookup opened file %s size %d", dirPath.Child(localEntry.Name()), filer.FileSize(entry))
diff --git a/weed/mount/weedfs_dir_read.go b/weed/mount/weedfs_dir_read.go
index c80ecce9e..6e18b50e8 100644
--- a/weed/mount/weedfs_dir_read.go
+++ b/weed/mount/weedfs_dir_read.go
@@ -46,30 +46,30 @@ func NewDirectoryHandleToInode() *DirectoryHandleToInode {
 func (wfs *WFS) AcquireDirectoryHandle() (DirectoryHandleId, *DirectoryHandle) {
 	fh := FileHandleId(util.RandomUint64())
 
-	wfs.dhmap.Lock()
-	defer wfs.dhmap.Unlock()
+	wfs.dhMap.Lock()
+	defer wfs.dhMap.Unlock()
 	dh := new(DirectoryHandle)
 	dh.reset()
-	wfs.dhmap.dir2inode[DirectoryHandleId(fh)] = dh
+	wfs.dhMap.dir2inode[DirectoryHandleId(fh)] = dh
 	return DirectoryHandleId(fh), dh
 }
 
 func (wfs *WFS) GetDirectoryHandle(dhid DirectoryHandleId) *DirectoryHandle {
-	wfs.dhmap.Lock()
-	defer wfs.dhmap.Unlock()
-	if dh, found := wfs.dhmap.dir2inode[dhid]; found {
+	wfs.dhMap.Lock()
+	defer wfs.dhMap.Unlock()
+	if dh, found := wfs.dhMap.dir2inode[dhid]; found {
 		return dh
 	}
 	dh := new(DirectoryHandle)
 	dh.reset()
-	wfs.dhmap.dir2inode[dhid] = dh
+	wfs.dhMap.dir2inode[dhid] = dh
 	return dh
 }
 
 func (wfs *WFS) ReleaseDirectoryHandle(dhid DirectoryHandleId) {
-	wfs.dhmap.Lock()
-	defer wfs.dhmap.Unlock()
-	delete(wfs.dhmap.dir2inode, dhid)
+	wfs.dhMap.Lock()
+	defer wfs.dhMap.Unlock()
+	delete(wfs.dhMap.dir2inode, dhid)
 }
 
 // Directory handling
@@ -169,7 +169,7 @@ func (wfs *WFS) doReadDirectory(input *fuse.ReadIn, out *fuse.DirEntryList, isPl
 				isEarlyTerminated = true
 				return false
 			}
-			if fh, found := wfs.fhmap.FindFileHandle(inode); found {
+			if fh, found := wfs.fhMap.FindFileHandle(inode); found {
 				glog.V(4).Infof("readdir opened file %s", dirPath.Child(dirEntry.Name))
 				entry = filer.FromPbEntry(string(dirPath), fh.GetEntry().GetEntry())
 			}
diff --git a/weed/mount/weedfs_filehandle.go b/weed/mount/weedfs_filehandle.go
index 99b54850a..e0149aee9 100644
--- a/weed/mount/weedfs_filehandle.go
+++ b/weed/mount/weedfs_filehandle.go
@@ -18,15 +18,15 @@ func (wfs *WFS) AcquireHandle(inode uint64, flags, uid, gid uint32) (fileHandle
 			}
 		}
 		// need to AcquireFileHandle again to ensure correct handle counter
-		fileHandle = wfs.fhmap.AcquireFileHandle(wfs, inode, entry)
+		fileHandle = wfs.fhMap.AcquireFileHandle(wfs, inode, entry)
 	}
 	return
 }
 
 func (wfs *WFS) ReleaseHandle(handleId FileHandleId) {
-	wfs.fhmap.ReleaseByHandle(handleId)
+	wfs.fhMap.ReleaseByHandle(handleId)
 }
 
 func (wfs *WFS) GetHandle(handleId FileHandleId) *FileHandle {
-	return wfs.fhmap.GetFileHandle(handleId)
+	return wfs.fhMap.GetFileHandle(handleId)
 }
diff --git a/weed/mount/weedfs_forget.go b/weed/mount/weedfs_forget.go
index 2f9cff7e6..0a45aba6b 100644
--- a/weed/mount/weedfs_forget.go
+++ b/weed/mount/weedfs_forget.go
@@ -65,5 +65,5 @@ func (wfs *WFS) Forget(nodeid, nlookup uint64) {
 	wfs.inodeToPath.Forget(nodeid, nlookup, func(dir util.FullPath) {
 		wfs.metaCache.DeleteFolderChildren(context.Background(), dir)
 	})
-	wfs.fhmap.ReleaseByInode(nodeid)
+	wfs.fhMap.ReleaseByInode(nodeid)
 }
diff --git a/weed/mount/weedfs_rename.go b/weed/mount/weedfs_rename.go
index 58c60aa28..f9fc85b3f 100644
--- a/weed/mount/weedfs_rename.go
+++ b/weed/mount/weedfs_rename.go
@@ -235,7 +235,7 @@ func (wfs *WFS) handleRenameResponse(ctx context.Context, resp *filer_pb.StreamR
 
 		sourceInode, targetInode := wfs.inodeToPath.MovePath(oldPath, newPath)
 		if sourceInode != 0 {
-			fh, foundFh := wfs.fhmap.FindFileHandle(sourceInode)
+			fh, foundFh := wfs.fhMap.FindFileHandle(sourceInode)
 			if foundFh {
 				if entry := fh.GetEntry(); entry != nil {
 					entry.Name = newName