WIP

no memory issue

if some directory is removed, it may have this error

$ rm -Rf ~/tmp/m2/s1
rm: fts_read: Device not configured

go.mod

@@ -102,7 +102,7 @@ require (
 	gopkg.in/karlseguin/expect.v1 v1.0.1 // indirect
 )
 
-// replace github.com/seaweedfs/fuse => /Users/chris/go/src/github.com/seaweedfs/fuse
+replace github.com/seaweedfs/fuse => /Users/chris/go/src/github.com/seaweedfs/fuse
 // replace github.com/chrislusf/raft => /Users/chris/go/src/github.com/chrislusf/raft
 
 replace go.etcd.io/etcd => go.etcd.io/etcd v0.5.0-alpha.5.0.20200425165423-262c93980547

weed/filesys/dir.go

@@ -27,6 +27,7 @@ type Dir struct {
 }
 
 var _ = fs.Node(&Dir{})
+var _ = fs.NodeIdentifier(&Dir{})
 var _ = fs.NodeCreater(&Dir{})
 var _ = fs.NodeMknoder(&Dir{})
 var _ = fs.NodeMkdirer(&Dir{})
@@ -42,6 +43,10 @@ var _ = fs.NodeRemovexattrer(&Dir{})
 var _ = fs.NodeListxattrer(&Dir{})
 var _ = fs.NodeForgetter(&Dir{})
 
+func (dir *Dir) Id() uint64 {
+	return util.FullPath(dir.FullPath()).AsInode()
+}
+
 func (dir *Dir) Attr(ctx context.Context, attr *fuse.Attr) error {
 
 	// https://github.com/bazil/fuse/issues/196
@@ -105,24 +110,17 @@ func (dir *Dir) Fsync(ctx context.Context, req *fuse.FsyncRequest) error {
 }
 
 func (dir *Dir) newFile(name string) fs.Node {
-	f := dir.wfs.fsNodeCache.EnsureFsNode(util.NewFullPath(dir.FullPath(), name), func() fs.Node {
 	return &File{
 		Name:  name,
 		dir:   dir,
 		wfs:   dir.wfs,
 	}
-	})
-	f.(*File).dir = dir // in case dir node was created later
-	return f
 }
 
 func (dir *Dir) newDirectory(fullpath util.FullPath) fs.Node {
 
-	d := dir.wfs.fsNodeCache.EnsureFsNode(fullpath, func() fs.Node {
 	return &Dir{name: fullpath.Name(), wfs: dir.wfs, parent: dir}
-	})
-	d.(*Dir).parent = dir // in case dir node was created later
-	return d
+
 }
 
 func (dir *Dir) Create(ctx context.Context, req *fuse.CreateRequest,
@@ -396,15 +394,6 @@ func (dir *Dir) removeOneFile(req *fuse.RemoveRequest) error {
 		return fuse.ESTALE
 	}
 
-	// clear entry inside the file
-	fsNode := dir.wfs.fsNodeCache.GetFsNode(filePath)
-	dir.wfs.fsNodeCache.DeleteFsNode(filePath)
-	if fsNode != nil {
-		if file, ok := fsNode.(*File); ok {
-			file.entry = nil
-		}
-	}
-
 	// remove current file handle if any
 	dir.wfs.handlesLock.Lock()
 	defer dir.wfs.handlesLock.Unlock()
@@ -431,7 +420,6 @@ func (dir *Dir) removeFolder(req *fuse.RemoveRequest) error {
 
 	t := util.NewFullPath(dirFullPath, req.Name)
 	dir.wfs.metaCache.DeleteEntry(context.Background(), t)
-	dir.wfs.fsNodeCache.DeleteFsNode(t)
 
 	return nil
 
@@ -519,8 +507,6 @@ func (dir *Dir) Listxattr(ctx context.Context, req *fuse.ListxattrRequest, resp
 
 func (dir *Dir) Forget() {
 	glog.V(4).Infof("Forget dir %s", dir.FullPath())
-
-	dir.wfs.fsNodeCache.DeleteFsNode(util.FullPath(dir.FullPath()))
 }
 
 func (dir *Dir) maybeLoadEntry() (*filer_pb.Entry, error) {

weed/filesys/dir_rename.go

@@ -64,19 +64,17 @@ func (dir *Dir) Rename(ctx context.Context, req *fuse.RenameRequest, newDirector
 		return fuse.EIO
 	}
 
-	// fmt.Printf("rename path: %v => %v\n", oldPath, newPath)
-	dir.wfs.fsNodeCache.Move(oldPath, newPath)
-
 	// change file handle
 	dir.wfs.handlesLock.Lock()
 	defer dir.wfs.handlesLock.Unlock()
 	inodeId := oldPath.AsInode()
 	existingHandle, found := dir.wfs.handles[inodeId]
 	if !found || existingHandle == nil {
-		return err
+		return nil
 	}
+	glog.V(4).Infof("opened filehandle %s => %s", oldPath, newPath)
 	delete(dir.wfs.handles, inodeId)
 	dir.wfs.handles[newPath.AsInode()] = existingHandle
 
-	return err
+	return nil
 }

weed/filesys/file.go

@@ -18,6 +18,7 @@ import (
 const blockSize = 512
 
 var _ = fs.Node(&File{})
+var _ = fs.NodeIdentifier(&File{})
 var _ = fs.NodeOpener(&File{})
 var _ = fs.NodeFsyncer(&File{})
 var _ = fs.NodeSetattrer(&File{})
@@ -40,6 +41,10 @@ func (file *File) fullpath() util.FullPath {
 	return util.NewFullPath(file.dir.FullPath(), file.Name)
 }
 
+func (file *File) Id() uint64 {
+	return file.fullpath().AsInode()
+}
+
 func (file *File) Attr(ctx context.Context, attr *fuse.Attr) (err error) {
 
 	glog.V(4).Infof("file Attr %s, open:%v existing:%v", file.fullpath(), file.isOpen, attr)
@@ -253,7 +258,6 @@ func (file *File) Fsync(ctx context.Context, req *fuse.FsyncRequest) error {
 func (file *File) Forget() {
 	t := util.NewFullPath(file.dir.FullPath(), file.Name)
 	glog.V(4).Infof("Forget file %s", t)
-	file.wfs.fsNodeCache.DeleteFsNode(t)
 	file.wfs.ReleaseHandle(t, 0)
 }
 

weed/filesys/wfs.go

@@ -103,25 +103,16 @@ func NewSeaweedFileSystem(option *Option) *WFS {
 	}
 
 	wfs.metaCache = meta_cache.NewMetaCache(path.Join(cacheDir, "meta"), util.FullPath(option.FilerMountRootPath), option.UidGidMapper, func(filePath util.FullPath) {
-		fsNode := wfs.fsNodeCache.GetFsNode(filePath)
-		if fsNode != nil {
-			if file, ok := fsNode.(*File); ok {
-				if err := wfs.Server.InvalidateNodeData(file); err != nil {
+		fsNode := NodeWithId(filePath.AsInode())
+		if err := wfs.Server.InvalidateNodeData(fsNode); err != nil {
 			glog.V(4).Infof("InvalidateNodeData %s : %v", filePath, err)
 		}
-				file.entry = nil
-			}
-		}
+
 		dir, name := filePath.DirAndName()
-		parent := wfs.root
-		if dir != "/" {
-			parent = wfs.fsNodeCache.GetFsNode(util.FullPath(dir))
-		}
-		if parent != nil {
+		parent := NodeWithId(util.FullPath(dir).AsInode())
 		if err := wfs.Server.InvalidateEntry(parent, name); err != nil {
 			glog.V(4).Infof("InvalidateEntry %s : %v", filePath, err)
 		}
-		}
 	})
 	startTime := time.Now()
 	go meta_cache.SubscribeMetaEvents(wfs.metaCache, wfs.signature, wfs, wfs.option.FilerMountRootPath, startTime.UnixNano())
@@ -267,3 +258,11 @@ func (wfs *WFS) LookupFn() wdclient.LookupFileIdFunctionType {
 	return filer.LookupFn(wfs)
 
 }
+
+type NodeWithId uint64
+func (n NodeWithId) Id() uint64 {
+	return uint64(n)
+}
+func (n NodeWithId) Attr(ctx context.Context, attr *fuse.Attr) error {
+	return nil
+}