remove fsnode cache

fix https://github.com/chrislusf/seaweedfs/issues/1400

6 files changed, 9 insertions, 323 deletions

diff --git a/weed/filesys/dir.go b/weed/filesys/dir.go
index 8454e51aa..77d01d463 100644
--- a/weed/filesys/dir.go
+++ b/weed/filesys/dir.go
@@ -100,22 +100,18 @@ func (dir *Dir) Fsync(ctx context.Context, req *fuse.FsyncRequest) error {
 }
 
 func (dir *Dir) newFile(name string, entry *filer_pb.Entry) fs.Node {
-	return dir.wfs.fsNodeCache.EnsureFsNode(util.NewFullPath(dir.FullPath(), name), func() fs.Node {
-		return &File{
-			Name:           name,
-			dir:            dir,
-			wfs:            dir.wfs,
-			entry:          entry,
-			entryViewCache: nil,
-		}
-	})
+	return &File{
+		Name:           name,
+		dir:            dir,
+		wfs:            dir.wfs,
+		entry:          entry,
+		entryViewCache: nil,
+	}
 }
 
 func (dir *Dir) newDirectory(fullpath util.FullPath, entry *filer_pb.Entry) fs.Node {
 
-	return dir.wfs.fsNodeCache.EnsureFsNode(fullpath, func() fs.Node {
-		return &Dir{name: entry.Name, wfs: dir.wfs, entry: entry, parent: dir}
-	})
+	return &Dir{name: entry.Name, wfs: dir.wfs, entry: entry, parent: dir}
 
 }
 
@@ -315,8 +311,6 @@ func (dir *Dir) removeOneFile(req *fuse.RemoveRequest) error {
 
 	dir.wfs.deleteFileChunks(entry.Chunks)
 
-	dir.wfs.fsNodeCache.DeleteFsNode(filePath)
-
 	dir.wfs.metaCache.DeleteEntry(context.Background(), filePath)
 
 	glog.V(3).Infof("remove file: %v", req)
@@ -333,7 +327,6 @@ func (dir *Dir) removeOneFile(req *fuse.RemoveRequest) error {
 func (dir *Dir) removeFolder(req *fuse.RemoveRequest) error {
 
 	t := util.NewFullPath(dir.FullPath(), req.Name)
-	dir.wfs.fsNodeCache.DeleteFsNode(t)
 
 	dir.wfs.metaCache.DeleteEntry(context.Background(), t)
 
@@ -426,8 +419,6 @@ func (dir *Dir) Listxattr(ctx context.Context, req *fuse.ListxattrRequest, resp
 
 func (dir *Dir) Forget() {
 	glog.V(3).Infof("Forget dir %s", dir.FullPath())
-
-	dir.wfs.fsNodeCache.DeleteFsNode(util.FullPath(dir.FullPath()))
 }
 
 func (dir *Dir) maybeLoadEntry() error {
diff --git a/weed/filesys/dir_rename.go b/weed/filesys/dir_rename.go
index da4f1b232..120dffd1d 100644
--- a/weed/filesys/dir_rename.go
+++ b/weed/filesys/dir_rename.go
@@ -62,7 +62,6 @@ func (dir *Dir) Rename(ctx context.Context, req *fuse.RenameRequest, newDirector
 	}
 
 	// fmt.Printf("rename path: %v => %v\n", oldPath, newPath)
-	dir.wfs.fsNodeCache.Move(oldPath, newPath)
 	delete(dir.wfs.handles, oldPath.AsInode())
 
 	return err
diff --git a/weed/filesys/file.go b/weed/filesys/file.go
index dcda93522..f96cd8118 100644
--- a/weed/filesys/file.go
+++ b/weed/filesys/file.go
@@ -213,7 +213,6 @@ 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(3).Infof("Forget file %s", t)
-	file.wfs.fsNodeCache.DeleteFsNode(t)
 }
 
 func (file *File) maybeLoadEntry(ctx context.Context) error {
diff --git a/weed/filesys/fscache.go b/weed/filesys/fscache.go
deleted file mode 100644
index b146f0615..000000000
--- a/weed/filesys/fscache.go
+++ /dev/null
@@ -1,207 +0,0 @@
-package filesys
-
-import (
-	"sync"
-
-	"github.com/chrislusf/seaweedfs/weed/util"
-	"github.com/seaweedfs/fuse/fs"
-)
-
-type FsCache struct {
-	root *FsNode
-	sync.RWMutex
-}
-type FsNode struct {
-	parent       *FsNode
-	node         fs.Node
-	name         string
-	childrenLock sync.RWMutex
-	children     map[string]*FsNode
-}
-
-func newFsCache(root fs.Node) *FsCache {
-	return &FsCache{
-		root: &FsNode{
-			node: root,
-		},
-	}
-}
-
-func (c *FsCache) GetFsNode(path util.FullPath) fs.Node {
-
-	c.RLock()
-	defer c.RUnlock()
-
-	return c.doGetFsNode(path)
-}
-
-func (c *FsCache) doGetFsNode(path util.FullPath) fs.Node {
-	t := c.root
-	for _, p := range path.Split() {
-		t = t.findChild(p)
-		if t == nil {
-			return nil
-		}
-	}
-	return t.node
-}
-
-func (c *FsCache) SetFsNode(path util.FullPath, node fs.Node) {
-
-	c.Lock()
-	defer c.Unlock()
-
-	c.doSetFsNode(path, node)
-}
-
-func (c *FsCache) doSetFsNode(path util.FullPath, node fs.Node) {
-	t := c.root
-	for _, p := range path.Split() {
-		t = t.ensureChild(p)
-	}
-	t.node = node
-}
-
-func (c *FsCache) EnsureFsNode(path util.FullPath, genNodeFn func() fs.Node) fs.Node {
-
-	c.Lock()
-	defer c.Unlock()
-
-	t := c.doGetFsNode(path)
-	if t != nil {
-		return t
-	}
-	t = genNodeFn()
-	c.doSetFsNode(path, t)
-	return t
-}
-
-func (c *FsCache) DeleteFsNode(path util.FullPath) {
-
-	c.Lock()
-	defer c.Unlock()
-
-	t := c.root
-	for _, p := range path.Split() {
-		t = t.findChild(p)
-		if t == nil {
-			return
-		}
-	}
-	if t.parent != nil {
-		t.parent.disconnectChild(t)
-	}
-	t.deleteSelf()
-}
-
-// oldPath and newPath are full path including the new name
-func (c *FsCache) Move(oldPath util.FullPath, newPath util.FullPath) *FsNode {
-
-	c.Lock()
-	defer c.Unlock()
-
-	// find old node
-	src := c.root
-	for _, p := range oldPath.Split() {
-		src = src.findChild(p)
-		if src == nil {
-			return src
-		}
-	}
-	if src.parent != nil {
-		src.parent.disconnectChild(src)
-	}
-
-	// find new node
-	target := c.root
-	for _, p := range newPath.Split() {
-		target = target.ensureChild(p)
-	}
-	parent := target.parent
-	src.name = target.name
-	if dir, ok := src.node.(*Dir); ok {
-		dir.name = target.name // target is not Dir, but a shortcut
-	}
-	if f, ok := src.node.(*File); ok {
-		f.Name = target.name
-		if f.entry != nil {
-			f.entry.Name = f.Name
-		}
-	}
-	parent.disconnectChild(target)
-
-	target.deleteSelf()
-
-	src.connectToParent(parent)
-
-	return src
-}
-
-func (n *FsNode) connectToParent(parent *FsNode) {
-	n.parent = parent
-	oldNode := parent.findChild(n.name)
-	if oldNode != nil {
-		oldNode.deleteSelf()
-	}
-	if dir, ok := n.node.(*Dir); ok {
-		dir.parent = parent.node.(*Dir)
-	}
-	if f, ok := n.node.(*File); ok {
-		f.dir = parent.node.(*Dir)
-	}
-	n.childrenLock.Lock()
-	parent.children[n.name] = n
-	n.childrenLock.Unlock()
-}
-
-func (n *FsNode) findChild(name string) *FsNode {
-	n.childrenLock.RLock()
-	defer n.childrenLock.RUnlock()
-
-	child, found := n.children[name]
-	if found {
-		return child
-	}
-	return nil
-}
-
-func (n *FsNode) ensureChild(name string) *FsNode {
-	n.childrenLock.Lock()
-	defer n.childrenLock.Unlock()
-
-	if n.children == nil {
-		n.children = make(map[string]*FsNode)
-	}
-	child, found := n.children[name]
-	if found {
-		return child
-	}
-	t := &FsNode{
-		parent:   n,
-		node:     nil,
-		name:     name,
-		children: nil,
-	}
-	n.children[name] = t
-	return t
-}
-
-func (n *FsNode) disconnectChild(child *FsNode) {
-	n.childrenLock.Lock()
-	delete(n.children, child.name)
-	n.childrenLock.Unlock()
-	child.parent = nil
-}
-
-func (n *FsNode) deleteSelf() {
-	n.childrenLock.Lock()
-	for _, child := range n.children {
-		child.deleteSelf()
-	}
-	n.children = nil
-	n.childrenLock.Unlock()
-
-	n.node = nil
-	n.parent = nil
-
-}
diff --git a/weed/filesys/fscache_test.go b/weed/filesys/fscache_test.go
deleted file mode 100644
index 67f9aacc8..000000000
--- a/weed/filesys/fscache_test.go
+++ /dev/null
@@ -1,96 +0,0 @@
-package filesys
-
-import (
-	"testing"
-
-	"github.com/chrislusf/seaweedfs/weed/util"
-)
-
-func TestPathSplit(t *testing.T) {
-	parts := util.FullPath("/").Split()
-	if len(parts) != 0 {
-		t.Errorf("expecting an empty list, but getting %d", len(parts))
-	}
-
-	parts = util.FullPath("/readme.md").Split()
-	if len(parts) != 1 {
-		t.Errorf("expecting an empty list, but getting %d", len(parts))
-	}
-
-}
-
-func TestFsCache(t *testing.T) {
-
-	cache := newFsCache(nil)
-
-	x := cache.GetFsNode(util.FullPath("/y/x"))
-	if x != nil {
-		t.Errorf("wrong node!")
-	}
-
-	p := util.FullPath("/a/b/c")
-	cache.SetFsNode(p, &File{Name: "cc"})
-	tNode := cache.GetFsNode(p)
-	tFile := tNode.(*File)
-	if tFile.Name != "cc" {
-		t.Errorf("expecting a FsNode")
-	}
-
-	cache.SetFsNode(util.FullPath("/a/b/d"), &File{Name: "dd"})
-	cache.SetFsNode(util.FullPath("/a/b/e"), &File{Name: "ee"})
-	cache.SetFsNode(util.FullPath("/a/b/f"), &File{Name: "ff"})
-	cache.SetFsNode(util.FullPath("/z"), &File{Name: "zz"})
-	cache.SetFsNode(util.FullPath("/a"), &File{Name: "aa"})
-
-	b := cache.GetFsNode(util.FullPath("/a/b"))
-	if b != nil {
-		t.Errorf("unexpected node!")
-	}
-
-	a := cache.GetFsNode(util.FullPath("/a"))
-	if a == nil {
-		t.Errorf("missing node!")
-	}
-
-	cache.DeleteFsNode(util.FullPath("/a"))
-	if b != nil {
-		t.Errorf("unexpected node!")
-	}
-
-	a = cache.GetFsNode(util.FullPath("/a"))
-	if a != nil {
-		t.Errorf("wrong DeleteFsNode!")
-	}
-
-	z := cache.GetFsNode(util.FullPath("/z"))
-	if z == nil {
-		t.Errorf("missing node!")
-	}
-
-	y := cache.GetFsNode(util.FullPath("/x/y"))
-	if y != nil {
-		t.Errorf("wrong node!")
-	}
-
-}
-
-func TestFsCacheMove(t *testing.T) {
-
-	cache := newFsCache(nil)
-
-	cache.SetFsNode(util.FullPath("/a/b/d"), &File{Name: "dd"})
-	cache.SetFsNode(util.FullPath("/a/b/e"), &File{Name: "ee"})
-	cache.SetFsNode(util.FullPath("/z"), &File{Name: "zz"})
-	cache.SetFsNode(util.FullPath("/a"), &File{Name: "aa"})
-
-	cache.Move(util.FullPath("/a/b"), util.FullPath("/z/x"))
-
-	d := cache.GetFsNode(util.FullPath("/z/x/d"))
-	if d == nil {
-		t.Errorf("unexpected nil node!")
-	}
-	if d.(*File).Name != "dd" {
-		t.Errorf("unexpected non dd node!")
-	}
-
-}
diff --git a/weed/filesys/wfs.go b/weed/filesys/wfs.go
index 1bd36167b..f4bf0eadd 100644
--- a/weed/filesys/wfs.go
+++ b/weed/filesys/wfs.go
@@ -102,7 +102,7 @@ func NewSeaweedFileSystem(option *Option) *WFS {
 	})
 
 	wfs.root = &Dir{name: wfs.option.FilerMountRootPath, wfs: wfs}
-	wfs.fsNodeCache = newFsCache(wfs.root)
+	// wfs.fsNodeCache = newFsCache(wfs.root)
 
 	return wfs
 }