1 files changed, 0 insertions, 178 deletions
diff --git a/pkg/sentry/fsimpl/memfs/directory.go b/pkg/sentry/fsimpl/memfs/directory.go
deleted file mode 100644
index b0c3ea39a..000000000
--- a/pkg/sentry/fsimpl/memfs/directory.go
+++ /dev/null
@@ -1,178 +0,0 @@
-// Copyright 2019 The gVisor Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package memfs
-
-import (
-	"gvisor.dev/gvisor/pkg/abi/linux"
-	"gvisor.dev/gvisor/pkg/sentry/context"
-	"gvisor.dev/gvisor/pkg/sentry/kernel/auth"
-	"gvisor.dev/gvisor/pkg/sentry/vfs"
-	"gvisor.dev/gvisor/pkg/syserror"
-)
-
-type directory struct {
-	inode Inode
-
-	// childList is a list containing (1) child Dentries and (2) fake Dentries
-	// (with inode == nil) that represent the iteration position of
-	// directoryFDs. childList is used to support directoryFD.IterDirents()
-	// efficiently. childList is protected by Filesystem.mu.
-	childList dentryList
-}
-
-func (fs *Filesystem) newDirectory(creds *auth.Credentials, mode uint16) *Inode {
-	dir := &directory{}
-	dir.inode.init(dir, fs, creds, mode)
-	dir.inode.nlink = 2 // from "." and parent directory or ".." for root
-	return &dir.inode
-}
-
-func (i *Inode) isDir() bool {
-	_, ok := i.impl.(*directory)
-	return ok
-}
-
-type directoryFD struct {
-	fileDescription
-	vfs.DirectoryFileDescriptionDefaultImpl
-
-	// Protected by Filesystem.mu.
-	iter *Dentry
-	off  int64
-}
-
-// Release implements vfs.FileDescriptionImpl.Release.
-func (fd *directoryFD) Release() {
-	if fd.iter != nil {
-		fs := fd.filesystem()
-		dir := fd.inode().impl.(*directory)
-		fs.mu.Lock()
-		dir.childList.Remove(fd.iter)
-		fs.mu.Unlock()
-		fd.iter = nil
-	}
-}
-
-// IterDirents implements vfs.FileDescriptionImpl.IterDirents.
-func (fd *directoryFD) IterDirents(ctx context.Context, cb vfs.IterDirentsCallback) error {
-	fs := fd.filesystem()
-	d := fd.vfsfd.VirtualDentry().Dentry()
-
-	fs.mu.Lock()
-	defer fs.mu.Unlock()
-
-	if fd.off == 0 {
-		if !cb.Handle(vfs.Dirent{
-			Name: ".",
-			Type: linux.DT_DIR,
-			Ino:  d.Impl().(*Dentry).inode.ino,
-			Off:  0,
-		}) {
-			return nil
-		}
-		fd.off++
-	}
-	if fd.off == 1 {
-		parentInode := d.ParentOrSelf().Impl().(*Dentry).inode
-		if !cb.Handle(vfs.Dirent{
-			Name: "..",
-			Type: parentInode.direntType(),
-			Ino:  parentInode.ino,
-			Off:  1,
-		}) {
-			return nil
-		}
-		fd.off++
-	}
-
-	dir := d.Impl().(*Dentry).inode.impl.(*directory)
-	var child *Dentry
-	if fd.iter == nil {
-		// Start iteration at the beginning of dir.
-		child = dir.childList.Front()
-		fd.iter = &Dentry{}
-	} else {
-		// Continue iteration from where we left off.
-		child = fd.iter.Next()
-		dir.childList.Remove(fd.iter)
-	}
-	for child != nil {
-		// Skip other directoryFD iterators.
-		if child.inode != nil {
-			if !cb.Handle(vfs.Dirent{
-				Name: child.vfsd.Name(),
-				Type: child.inode.direntType(),
-				Ino:  child.inode.ino,
-				Off:  fd.off,
-			}) {
-				dir.childList.InsertBefore(child, fd.iter)
-				return nil
-			}
-			fd.off++
-		}
-		child = child.Next()
-	}
-	dir.childList.PushBack(fd.iter)
-	return nil
-}
-
-// Seek implements vfs.FileDescriptionImpl.Seek.
-func (fd *directoryFD) Seek(ctx context.Context, offset int64, whence int32) (int64, error) {
-	if whence != linux.SEEK_SET {
-		// TODO: Linux also allows SEEK_CUR.
-		return 0, syserror.EINVAL
-	}
-	if offset < 0 {
-		return 0, syserror.EINVAL
-	}
-
-	fd.off = offset
-	// Compensate for "." and "..".
-	var remChildren int64
-	if offset < 2 {
-		remChildren = 0
-	} else {
-		remChildren = offset - 2
-	}
-
-	fs := fd.filesystem()
-	dir := fd.inode().impl.(*directory)
-
-	fs.mu.Lock()
-	defer fs.mu.Unlock()
-
-	// Ensure that fd.iter exists and is not linked into dir.childList.
-	if fd.iter == nil {
-		fd.iter = &Dentry{}
-	} else {
-		dir.childList.Remove(fd.iter)
-	}
-	// Insert fd.iter before the remChildren'th child, or at the end of the
-	// list if remChildren >= number of children.
-	child := dir.childList.Front()
-	for child != nil {
-		// Skip other directoryFD iterators.
-		if child.inode != nil {
-			if remChildren == 0 {
-				dir.childList.InsertBefore(child, fd.iter)
-				return offset, nil
-			}
-			remChildren--
-		}
-		child = child.Next()
-	}
-	dir.childList.PushBack(fd.iter)
-	return offset, nil
-}