pkg/containerfs: alias ContainerFS to string

Drop the constructor and redundant string() type-casts.

Signed-off-by: Cory Snider <csnider@mirantis.com>

builder/builder-next/adapters/snapshot/snapshot.go

@@ -291,7 +291,7 @@ func (s *snapshotter) Mounts(ctx context.Context, key string) (snapshot.Mountabl
 					return nil, nil, err
 				}
 				return []mount.Mount{{
-						Source:  string(rootfs),
+						Source:  rootfs,
 						Type:    "bind",
 						Options: []string{"rbind"},
 					}}, func() error {
@@ -312,7 +312,7 @@ func (s *snapshotter) Mounts(ctx context.Context, key string) (snapshot.Mountabl
 				return nil, nil, err
 			}
 			return []mount.Mount{{
-					Source:  string(rootfs),
+					Source:  rootfs,
 					Type:    "bind",
 					Options: []string{"rbind"},
 				}}, func() error {

builder/dockerfile/copy.go

@@ -45,7 +45,7 @@ type copyInfo struct {
 }
 
 func (c copyInfo) fullPath() (string, error) {
-	return containerfs.ResolveScopedPath(string(c.root), c.path)
+	return containerfs.ResolveScopedPath(c.root, c.path)
 }
 
 func newCopyInfoFromSource(source builder.Source, path string, hash string) copyInfo {
@@ -159,7 +159,7 @@ func (o *copier) getCopyInfoForSourcePath(orig, dest string) ([]copyInfo, error)
 		}
 		path = unnamedFilename
 	}
-	o.tmpPaths = append(o.tmpPaths, string(remote.Root()))
+	o.tmpPaths = append(o.tmpPaths, remote.Root())
 
 	hash, err := remote.Hash(path)
 	ci := newCopyInfoFromSource(remote, path, hash)
@@ -202,7 +202,7 @@ func (o *copier) calcCopyInfo(origPath string, allowWildcards bool) ([]copyInfo,
 
 		o.source, err = remotecontext.NewLazySource(rwLayer.Root())
 		if err != nil {
-			return nil, errors.Wrapf(err, "failed to create context for copy from %s", string(rwLayer.Root()))
+			return nil, errors.Wrapf(err, "failed to create context for copy from %s", rwLayer.Root())
 		}
 	}
 
@@ -259,7 +259,7 @@ func (o *copier) storeInPathCache(im *imageMount, path string, hash string) {
 func (o *copier) copyWithWildcards(origPath string) ([]copyInfo, error) {
 	root := o.source.Root()
 	var copyInfos []copyInfo
-	if err := filepath.Walk(string(root), func(path string, info os.FileInfo, err error) error {
+	if err := filepath.Walk(root, func(path string, info os.FileInfo, err error) error {
 		if err != nil {
 			return err
 		}
@@ -442,7 +442,7 @@ func downloadSource(output io.Writer, stdout io.Writer, srcURL string) (remote b
 		return
 	}
 
-	lc, err := remotecontext.NewLazySource(containerfs.NewLocalContainerFS(tmpDir))
+	lc, err := remotecontext.NewLazySource(tmpDir)
 	return lc, filename, err
 }
 

builder/dockerfile/internals.go

@@ -147,7 +147,7 @@ func (b *Builder) performCopy(req dispatchRequest, inst copyInstruction) error {
 	// translated (if necessary because of user namespaces), and replace
 	// the root pair with the chown pair for copy operations
 	if inst.chownStr != "" {
-		identity, err = parseChownFlag(b, state, inst.chownStr, string(destInfo.root), b.idMapping)
+		identity, err = parseChownFlag(b, state, inst.chownStr, destInfo.root, b.idMapping)
 		if err != nil {
 			if b.options.Platform != "windows" {
 				return errors.Wrapf(err, "unable to convert uid/gid chown string to host mapping")

builder/remotecontext/archive.go

@@ -20,7 +20,7 @@ type archiveContext struct {
 }
 
 func (c *archiveContext) Close() error {
-	return os.RemoveAll(string(c.root))
+	return os.RemoveAll(c.root)
 }
 
 func convertPathError(err error, cleanpath string) error {
@@ -53,7 +53,7 @@ func FromArchive(tarStream io.Reader) (builder.Source, error) {
 	}
 
 	// Assume local file system. Since it's coming from a tar file.
-	tsc := &archiveContext{root: containerfs.NewLocalContainerFS(root)}
+	tsc := &archiveContext{root: root}
 
 	// Make sure we clean-up upon error.  In the happy case the caller
 	// is expected to manage the clean-up
@@ -100,7 +100,7 @@ func (c *archiveContext) Hash(path string) (string, error) {
 		return "", err
 	}
 
-	rel, err := filepath.Rel(string(c.root), fullpath)
+	rel, err := filepath.Rel(c.root, fullpath)
 	if err != nil {
 		return "", convertPathError(err, cleanpath)
 	}
@@ -117,7 +117,7 @@ func (c *archiveContext) Hash(path string) (string, error) {
 
 func normalize(path string, root containerfs.ContainerFS) (cleanPath, fullPath string, err error) {
 	cleanPath = filepath.Clean(string(filepath.Separator) + path)[1:]
-	fullPath, err = containerfs.ResolveScopedPath(string(root), path)
+	fullPath, err = containerfs.ResolveScopedPath(root, path)
 	if err != nil {
 		return "", "", errors.Wrapf(err, "forbidden path outside the build context: %s (%s)", path, cleanPath)
 	}

builder/remotecontext/detect.go

@@ -176,7 +176,7 @@ func StatAt(remote builder.Source, path string) (os.FileInfo, error) {
 
 // FullPath is a helper for getting a full path for a path from a source
 func FullPath(remote builder.Source, path string) (string, error) {
-	fullPath, err := containerfs.ResolveScopedPath(string(remote.Root()), path)
+	fullPath, err := containerfs.ResolveScopedPath(remote.Root(), path)
 	if err != nil {
 		if runtime.GOOS == "windows" {
 			return "", fmt.Errorf("failed to resolve scoped path %s (%s): %s. Possible cause is a forbidden path outside the build context", path, fullPath, err)

builder/remotecontext/detect_test.go

@@ -53,7 +53,7 @@ func checkDirectory(t *testing.T, dir string, expectedFiles []string) {
 }
 
 func executeProcess(t *testing.T, contextDir string) {
-	modifiableCtx := &stubRemote{root: containerfs.NewLocalContainerFS(contextDir)}
+	modifiableCtx := &stubRemote{root: contextDir}
 
 	err := removeDockerfile(modifiableCtx, builder.DefaultDockerfileName)
 
@@ -119,5 +119,5 @@ func (r *stubRemote) Close() error {
 	return errors.New("not implemented")
 }
 func (r *stubRemote) Remove(p string) error {
-	return os.Remove(filepath.Join(string(r.root), p))
+	return os.Remove(filepath.Join(r.root, p))
 }

builder/remotecontext/lazycontext.go

@@ -66,7 +66,7 @@ func (c *lazySource) Hash(path string) (string, error) {
 }
 
 func (c *lazySource) prepareHash(relPath string, fi os.FileInfo) (string, error) {
-	p := filepath.Join(string(c.root), relPath)
+	p := filepath.Join(c.root, relPath)
 	h, err := NewFileHash(p, relPath, fi)
 	if err != nil {
 		return "", errors.Wrapf(err, "failed to create hash for %s", relPath)
@@ -91,7 +91,7 @@ func (c *lazySource) prepareHash(relPath string, fi os.FileInfo) (string, error)
 func Rel(basepath containerfs.ContainerFS, targpath string) (string, error) {
 	// filepath.Rel can't handle UUID paths in windows
 	if runtime.GOOS == "windows" {
-		pfx := string(basepath) + `\`
+		pfx := basepath + `\`
 		if strings.HasPrefix(targpath, pfx) {
 			p := strings.TrimPrefix(targpath, pfx)
 			if p == "" {
@@ -100,5 +100,5 @@ func Rel(basepath containerfs.ContainerFS, targpath string) (string, error) {
 			return p, nil
 		}
 	}
-	return filepath.Rel(string(basepath), targpath)
+	return filepath.Rel(basepath, targpath)
 }

builder/remotecontext/tarsum.go

@@ -28,7 +28,7 @@ type CachableSource struct {
 func NewCachableSource(root string) *CachableSource {
 	ts := &CachableSource{
 		tree: iradix.New(),
-		root: containerfs.NewLocalContainerFS(root),
+		root: root,
 	}
 	return ts
 }
@@ -67,7 +67,7 @@ func (cs *CachableSource) Scan() error {
 		return err
 	}
 	txn := iradix.New().Txn()
-	err = filepath.Walk(string(cs.root), func(path string, info os.FileInfo, err error) error {
+	err = filepath.Walk(cs.root, func(path string, info os.FileInfo, err error) error {
 		if err != nil {
 			return errors.Wrapf(err, "failed to walk %s", path)
 		}

builder/remotecontext/tarsum_test.go

@@ -35,7 +35,7 @@ func TestCloseRootDirectory(t *testing.T) {
 		t.Fatalf("Error while executing Close: %s", err)
 	}
 
-	_, err = os.Stat(string(src.Root()))
+	_, err = os.Stat(src.Root())
 
 	if !errors.Is(err, os.ErrNotExist) {
 		t.Fatal("Directory should not exist at this point")
@@ -118,7 +118,7 @@ func TestRemoveDirectory(t *testing.T) {
 
 	src := makeTestArchiveContext(t, contextDir)
 
-	_, err = os.Stat(filepath.Join(string(src.Root()), relativePath))
+	_, err = os.Stat(filepath.Join(src.Root(), relativePath))
 	if err != nil {
 		t.Fatalf("Statting %s shouldn't fail: %+v", relativePath, err)
 	}
@@ -129,7 +129,7 @@ func TestRemoveDirectory(t *testing.T) {
 		t.Fatalf("Error when executing Remove: %s", err)
 	}
 
-	_, err = os.Stat(filepath.Join(string(src.Root()), relativePath))
+	_, err = os.Stat(filepath.Join(src.Root(), relativePath))
 	if !errors.Is(err, os.ErrNotExist) {
 		t.Fatalf("Directory should not exist at this point: %+v ", err)
 	}

container/archive.go

@@ -64,7 +64,7 @@ func (container *Container) StatPath(resolvedPath, absPath string) (stat *types.
 			return nil, err
 		}
 
-		linkTarget, err = filepath.Rel(string(container.BaseFS), hostPath)
+		linkTarget, err = filepath.Rel(container.BaseFS, hostPath)
 		if err != nil {
 			return nil, err
 		}

container/container.go

@@ -304,13 +304,13 @@ func (container *Container) GetResourcePath(path string) (string, error) {
 	}
 	// IMPORTANT - These are paths on the OS where the daemon is running, hence
 	// any filepath operations must be done in an OS agnostic way.
-	r, e := containerfs.ResolveScopedPath(string(container.BaseFS), containerfs.CleanScopedPath(path))
+	r, e := containerfs.ResolveScopedPath(container.BaseFS, containerfs.CleanScopedPath(path))
 
 	// Log this here on the daemon side as there's otherwise no indication apart
 	// from the error being propagated all the way back to the client. This makes
 	// debugging significantly easier and clearly indicates the error comes from the daemon.
 	if e != nil {
-		logrus.Errorf("Failed to ResolveScopedPath BaseFS %s path %s %s\n", string(container.BaseFS), path, e)
+		logrus.Errorf("Failed to ResolveScopedPath BaseFS %s path %s %s\n", container.BaseFS, path, e)
 	}
 	return r, e
 }

daemon/archive.go

@@ -246,7 +246,7 @@ func (daemon *Daemon) containerArchivePath(container *container.Container, path
 	}
 	opts := archive.TarResourceRebaseOpts(sourceBase, filepath.Base(absPath))
 
-	data, err := archivePath(driver, sourceDir, opts, string(container.BaseFS))
+	data, err := archivePath(driver, sourceDir, opts, container.BaseFS)
 	if err != nil {
 		return nil, nil, err
 	}
@@ -333,14 +333,14 @@ func (daemon *Daemon) containerExtractToDir(container *container.Container, path
 	// a volume file path.
 	var baseRel string
 	if strings.HasPrefix(resolvedPath, `\\?\Volume{`) {
-		if strings.HasPrefix(resolvedPath, string(driver)) {
+		if strings.HasPrefix(resolvedPath, driver) {
-			baseRel = resolvedPath[len(string(driver)):]
+			baseRel = resolvedPath[len(driver):]
 			if baseRel[:1] == `\` {
 				baseRel = baseRel[1:]
 			}
 		}
 	} else {
-		baseRel, err = filepath.Rel(string(driver), resolvedPath)
+		baseRel, err = filepath.Rel(driver, resolvedPath)
 	}
 	if err != nil {
 		return err
@@ -372,7 +372,7 @@ func (daemon *Daemon) containerExtractToDir(container *container.Container, path
 		}
 	}
 
-	if err := extractArchive(driver, content, resolvedPath, options, string(container.BaseFS)); err != nil {
+	if err := extractArchive(driver, content, resolvedPath, options, container.BaseFS); err != nil {
 		return err
 	}
 
@@ -434,7 +434,7 @@ func (daemon *Daemon) containerCopy(container *container.Container, resource str
 	archv, err := archivePath(driver, basePath, &archive.TarOptions{
 		Compression:  archive.Uncompressed,
 		IncludeFiles: filter,
-	}, string(container.BaseFS))
+	}, container.BaseFS)
 	if err != nil {
 		return nil, err
 	}

daemon/export.go

@@ -61,10 +61,10 @@ func (daemon *Daemon) containerExport(container *container.Container) (arch io.R
 		return nil, err
 	}
 
-	archv, err := archivePath(basefs, string(basefs), &archive.TarOptions{
+	archv, err := archivePath(basefs, basefs, &archive.TarOptions{
 		Compression: archive.Uncompressed,
 		IDMap:       daemon.idMapping,
-	}, string(basefs))
+	}, basefs)
 	if err != nil {
 		rwlayer.Unmount()
 		return nil, err

daemon/graphdriver/aufs/aufs.go

@@ -370,7 +370,7 @@ func (a *Driver) Get(id, mountLabel string) (containerfs.ContainerFS, error) {
 		}
 	}
 	if count := a.ctr.Increment(m); count > 1 {
-		return containerfs.NewLocalContainerFS(m), nil
+		return m, nil
 	}
 
 	// If a dir does not have a parent ( no layers )do not try to mount
@@ -384,7 +384,7 @@ func (a *Driver) Get(id, mountLabel string) (containerfs.ContainerFS, error) {
 	a.pathCacheLock.Lock()
 	a.pathCache[id] = m
 	a.pathCacheLock.Unlock()
-	return containerfs.NewLocalContainerFS(m), nil
+	return m, nil
 }
 
 // Put unmounts and updates list of active mounts.

daemon/graphdriver/aufs/aufs_test.go

@@ -43,14 +43,6 @@ func testInit(dir string, t testing.TB) graphdriver.Driver {
 	return d
 }
 
-func driverGet(d *Driver, id string, mntLabel string) (string, error) {
-	mnt, err := d.Get(id, mntLabel)
-	if err != nil {
-		return "", err
-	}
-	return string(mnt), nil
-}
-
 func newDriver(t testing.TB) *Driver {
 	if err := os.MkdirAll(tmp, 0755); err != nil {
 		t.Fatal(err)
@@ -180,7 +172,7 @@ func TestGetWithoutParent(t *testing.T) {
 		t.Fatal(err)
 	}
 	expected := path.Join(tmp, "diff", "1")
-	if string(diffPath) != expected {
+	if diffPath != expected {
 		t.Fatalf("Expected path %s got %s", expected, diffPath)
 	}
 }
@@ -262,8 +254,8 @@ func TestMountWithParent(t *testing.T) {
 	}
 
 	expected := path.Join(tmp, "mnt", "2")
-	if string(mntPath) != expected {
+	if mntPath != expected {
-		t.Fatalf("Expected %s got %s", expected, string(mntPath))
+		t.Fatalf("Expected %s got %s", expected, mntPath)
 	}
 }
 
@@ -323,7 +315,7 @@ func TestGetDiff(t *testing.T) {
 		t.Fatal(err)
 	}
 
-	diffPath, err := driverGet(d, "1", "")
+	diffPath, err := d.Get("1", "")
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -367,7 +359,7 @@ func TestChanges(t *testing.T) {
 		}
 	}()
 
-	mntPoint, err := driverGet(d, "2", "")
+	mntPoint, err := d.Get("2", "")
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -406,7 +398,7 @@ func TestChanges(t *testing.T) {
 	if err := d.CreateReadWrite("3", "2", nil); err != nil {
 		t.Fatal(err)
 	}
-	mntPoint, err = driverGet(d, "3", "")
+	mntPoint, err = d.Get("3", "")
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -452,7 +444,7 @@ func TestDiffSize(t *testing.T) {
 		t.Fatal(err)
 	}
 
-	diffPath, err := driverGet(d, "1", "")
+	diffPath, err := d.Get("1", "")
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -494,7 +486,7 @@ func TestChildDiffSize(t *testing.T) {
 		t.Fatal(err)
 	}
 
-	diffPath, err := driverGet(d, "1", "")
+	diffPath, err := d.Get("1", "")
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -595,7 +587,7 @@ func TestApplyDiff(t *testing.T) {
 		t.Fatal(err)
 	}
 
-	diffPath, err := driverGet(d, "1", "")
+	diffPath, err := d.Get("1", "")
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -630,7 +622,7 @@ func TestApplyDiff(t *testing.T) {
 
 	// Ensure that the file is in the mount point for id 3
 
-	mountPoint, err := driverGet(d, "3", "")
+	mountPoint, err := d.Get("3", "")
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -673,7 +665,7 @@ func testMountMoreThan42Layers(t *testing.T, mountPath string) {
 		err := d.CreateReadWrite(current, parent, nil)
 		assert.NilError(t, err, "current layer %d", i)
 
-		point, err := driverGet(d, current, "")
+		point, err := d.Get(current, "")
 		assert.NilError(t, err, "current layer %d", i)
 
 		f, err := os.Create(path.Join(point, current))
@@ -689,7 +681,7 @@ func testMountMoreThan42Layers(t *testing.T, mountPath string) {
 	}
 
 	// Perform the actual mount for the top most image
-	point, err := driverGet(d, last, "")
+	point, err := d.Get(last, "")
 	assert.NilError(t, err)
 	files, err := os.ReadDir(point)
 	assert.NilError(t, err)

daemon/graphdriver/btrfs/btrfs.go

@@ -649,7 +649,7 @@ func (d *Driver) Get(id, mountLabel string) (containerfs.ContainerFS, error) {
 		}
 	}
 
-	return containerfs.NewLocalContainerFS(dir), nil
+	return dir, nil
 }
 
 // Put is not implemented for BTRFS as there is no cleanup required for the id.

daemon/graphdriver/btrfs/btrfs_test.go

@@ -36,14 +36,12 @@ func TestBtrfsSubvolDelete(t *testing.T) {
 	}
 	defer graphtest.PutDriver(t)
 
-	dirFS, err := d.Get("test", "")
+	dir, err := d.Get("test", "")
 	if err != nil {
 		t.Fatal(err)
 	}
 	defer d.Put("test")
 
-	dir := string(dirFS)
-
 	if err := subvolCreate(dir, "subvoltest"); err != nil {
 		t.Fatal(err)
 	}

daemon/graphdriver/devmapper/driver.go

@@ -181,7 +181,7 @@ func (d *Driver) Get(id, mountLabel string) (containerfs.ContainerFS, error) {
 	mp := path.Join(d.home, "mnt", id)
 	rootFs := path.Join(mp, "rootfs")
 	if count := d.ctr.Increment(mp); count > 1 {
-		return containerfs.NewLocalContainerFS(rootFs), nil
+		return rootFs, nil
 	}
 
 	root := d.idMap.RootPair()
@@ -219,7 +219,7 @@ func (d *Driver) Get(id, mountLabel string) (containerfs.ContainerFS, error) {
 		}
 	}
 
-	return containerfs.NewLocalContainerFS(rootFs), nil
+	return rootFs, nil
 }
 
 // Put unmounts a device and removes it.

daemon/graphdriver/fsdiff.go

@@ -50,7 +50,7 @@ func (gdw *NaiveDiffDriver) Diff(id, parent string) (arch io.ReadCloser, err err
 	if err != nil {
 		return nil, err
 	}
-	layerFs := string(layerRootFs)
+	layerFs := layerRootFs
 
 	defer func() {
 		if err != nil {
@@ -70,14 +70,12 @@ func (gdw *NaiveDiffDriver) Diff(id, parent string) (arch io.ReadCloser, err err
 		}), nil
 	}
 
-	parentRootFs, err := driver.Get(parent, "")
+	parentFs, err := driver.Get(parent, "")
 	if err != nil {
 		return nil, err
 	}
 	defer driver.Put(parent)
 
-	parentFs := string(parentRootFs)
-
 	changes, err := archive.ChangesDirs(layerFs, parentFs)
 	if err != nil {
 		return nil, err
@@ -106,22 +104,20 @@ func (gdw *NaiveDiffDriver) Diff(id, parent string) (arch io.ReadCloser, err err
 func (gdw *NaiveDiffDriver) Changes(id, parent string) ([]archive.Change, error) {
 	driver := gdw.ProtoDriver
 
-	layerRootFs, err := driver.Get(id, "")
+	layerFs, err := driver.Get(id, "")
 	if err != nil {
 		return nil, err
 	}
 	defer driver.Put(id)
 
-	layerFs := string(layerRootFs)
 	parentFs := ""
 
 	if parent != "" {
-		parentRootFs, err := driver.Get(parent, "")
+		parentFs, err = driver.Get(parent, "")
 		if err != nil {
 			return nil, err
 		}
 		defer driver.Put(parent)
-		parentFs = string(parentRootFs)
 	}
 
 	return archive.ChangesDirs(layerFs, parentFs)
@@ -140,7 +136,7 @@ func (gdw *NaiveDiffDriver) ApplyDiff(id, parent string, diff io.Reader) (size i
 	}
 	defer driver.Put(id)
 
-	layerFs := string(layerRootFs)
+	layerFs := layerRootFs
 	options := &archive.TarOptions{IDMap: gdw.idMap}
 	start := time.Now().UTC()
 	logrus.WithField("id", id).Debug("Start untar layer")
@@ -169,5 +165,5 @@ func (gdw *NaiveDiffDriver) DiffSize(id, parent string) (size int64, err error)
 	}
 	defer driver.Put(id)
 
-	return archive.ChangesSize(string(layerFs), changes), nil
+	return archive.ChangesSize(layerFs, changes), nil
 }

daemon/graphdriver/fuse-overlayfs/fuseoverlayfs.go

@@ -316,14 +316,14 @@ func (d *Driver) Get(id, mountLabel string) (_ containerfs.ContainerFS, retErr e
 	if err != nil {
 		// If no lower, just return diff directory
 		if os.IsNotExist(err) {
-			return containerfs.NewLocalContainerFS(diffDir), nil
+			return diffDir, nil
 		}
 		return "", err
 	}
 
 	mergedDir := path.Join(dir, mergedDirName)
 	if count := d.ctr.Increment(mergedDir); count > 1 {
-		return containerfs.NewLocalContainerFS(mergedDir), nil
+		return mergedDir, nil
 	}
 	defer func() {
 		if retErr != nil {
@@ -380,7 +380,7 @@ func (d *Driver) Get(id, mountLabel string) (_ containerfs.ContainerFS, retErr e
 		return "", errors.Wrapf(err, "using mount program %s: %s", binary, output)
 	}
 
-	return containerfs.NewLocalContainerFS(mergedDir), nil
+	return mergedDir, nil
 }
 
 // Put unmounts the mount path created for the give id.

daemon/graphdriver/graphtest/graphbench_unix.go

@@ -250,7 +250,7 @@ func DriverBenchDeepLayerRead(b *testing.B, layerCount int, drivername string, d
 	for i := 0; i < b.N; i++ {
 
 		// Read content
-		c, err := os.ReadFile(filepath.Join(string(root), "testfile.txt"))
+		c, err := os.ReadFile(filepath.Join(root, "testfile.txt"))
 		if err != nil {
 			b.Fatal(err)
 		}

daemon/graphdriver/graphtest/graphtest_unix.go

@@ -96,10 +96,10 @@ func DriverTestCreateEmpty(t testing.TB, drivername string, driverOptions ...str
 	dir, err := driver.Get("empty", "")
 	assert.NilError(t, err)
 
-	verifyFile(t, string(dir), 0755|os.ModeDir, 0, 0)
+	verifyFile(t, dir, 0755|os.ModeDir, 0, 0)
 
 	// Verify that the directory is empty
-	fis, err := readDir(string(dir))
+	fis, err := readDir(dir)
 	assert.NilError(t, err)
 	assert.Check(t, is.Len(fis, 0))
 
@@ -324,19 +324,19 @@ func DriverTestSetQuota(t *testing.T, drivername string, required bool) {
 	quota := uint64(50 * units.MiB)
 
 	// Try to write a file smaller than quota, and ensure it works
-	err = writeRandomFile(path.Join(string(mountPath), "smallfile"), quota/2)
+	err = writeRandomFile(path.Join(mountPath, "smallfile"), quota/2)
 	if err != nil {
 		t.Fatal(err)
 	}
-	defer os.Remove(path.Join(string(mountPath), "smallfile"))
+	defer os.Remove(path.Join(mountPath, "smallfile"))
 
 	// Try to write a file bigger than quota. We've already filled up half the quota, so hitting the limit should be easy
-	err = writeRandomFile(path.Join(string(mountPath), "bigfile"), quota)
+	err = writeRandomFile(path.Join(mountPath, "bigfile"), quota)
 	if err == nil {
 		t.Fatalf("expected write to fail(), instead had success")
 	}
 	if pathError, ok := err.(*os.PathError); ok && pathError.Err != unix.EDQUOT && pathError.Err != unix.ENOSPC {
-		os.Remove(path.Join(string(mountPath), "bigfile"))
+		os.Remove(path.Join(mountPath, "bigfile"))
 		t.Fatalf("expect write() to fail with %v or %v, got %v", unix.EDQUOT, unix.ENOSPC, pathError.Err)
 	}
 }

daemon/graphdriver/graphtest/testutil.go

@@ -36,17 +36,17 @@ func addFiles(drv graphdriver.Driver, layer string, seed int64) error {
 	}
 	defer drv.Put(layer)
 
-	if err := os.WriteFile(filepath.Join(string(root), "file-a"), randomContent(64, seed), 0755); err != nil {
+	if err := os.WriteFile(filepath.Join(root, "file-a"), randomContent(64, seed), 0755); err != nil {
 		return err
 	}
-	if err := os.MkdirAll(filepath.Join(string(root), "dir-b"), 0755); err != nil {
+	if err := os.MkdirAll(filepath.Join(root, "dir-b"), 0755); err != nil {
 		return err
 	}
-	if err := os.WriteFile(filepath.Join(string(root), "dir-b", "file-b"), randomContent(128, seed+1), 0755); err != nil {
+	if err := os.WriteFile(filepath.Join(root, "dir-b", "file-b"), randomContent(128, seed+1), 0755); err != nil {
 		return err
 	}
 
-	return os.WriteFile(filepath.Join(string(root), "file-c"), randomContent(128*128, seed+2), 0755)
+	return os.WriteFile(filepath.Join(root, "file-c"), randomContent(128*128, seed+2), 0755)
 }
 
 func checkFile(drv graphdriver.Driver, layer, filename string, content []byte) error {
@@ -56,7 +56,7 @@ func checkFile(drv graphdriver.Driver, layer, filename string, content []byte) e
 	}
 	defer drv.Put(layer)
 
-	fileContent, err := os.ReadFile(filepath.Join(string(root), filename))
+	fileContent, err := os.ReadFile(filepath.Join(root, filename))
 	if err != nil {
 		return err
 	}
@@ -75,7 +75,7 @@ func addFile(drv graphdriver.Driver, layer, filename string, content []byte) err
 	}
 	defer drv.Put(layer)
 
-	return os.WriteFile(filepath.Join(string(root), filename), content, 0755)
+	return os.WriteFile(filepath.Join(root, filename), content, 0755)
 }
 
 func addDirectory(drv graphdriver.Driver, layer, dir string) error {
@@ -85,7 +85,7 @@ func addDirectory(drv graphdriver.Driver, layer, dir string) error {
 	}
 	defer drv.Put(layer)
 
-	return os.MkdirAll(filepath.Join(string(root), dir), 0755)
+	return os.MkdirAll(filepath.Join(root, dir), 0755)
 }
 
 func removeAll(drv graphdriver.Driver, layer string, names ...string) error {
@@ -96,7 +96,7 @@ func removeAll(drv graphdriver.Driver, layer string, names ...string) error {
 	defer drv.Put(layer)
 
 	for _, filename := range names {
-		if err := os.RemoveAll(filepath.Join(string(root), filename)); err != nil {
+		if err := os.RemoveAll(filepath.Join(root, filename)); err != nil {
 			return err
 		}
 	}
@@ -110,8 +110,8 @@ func checkFileRemoved(drv graphdriver.Driver, layer, filename string) error {
 	}
 	defer drv.Put(layer)
 
-	if _, err := os.Stat(filepath.Join(string(root), filename)); err == nil {
+	if _, err := os.Stat(filepath.Join(root, filename)); err == nil {
-		return fmt.Errorf("file still exists: %s", filepath.Join(string(root), filename))
+		return fmt.Errorf("file still exists: %s", filepath.Join(root, filename))
 	} else if !os.IsNotExist(err) {
 		return err
 	}
@@ -127,7 +127,7 @@ func addManyFiles(drv graphdriver.Driver, layer string, count int, seed int64) e
 	defer drv.Put(layer)
 
 	for i := 0; i < count; i += 100 {
-		dir := filepath.Join(string(root), fmt.Sprintf("directory-%d", i))
+		dir := filepath.Join(root, fmt.Sprintf("directory-%d", i))
 		if err := os.MkdirAll(dir, 0755); err != nil {
 			return err
 		}
@@ -152,7 +152,7 @@ func changeManyFiles(drv graphdriver.Driver, layer string, count int, seed int64
 	var changes []archive.Change
 	for i := 0; i < count; i += 100 {
 		archiveRoot := fmt.Sprintf("/directory-%d", i)
-		if err := os.MkdirAll(filepath.Join(string(root), archiveRoot), 0755); err != nil {
+		if err := os.MkdirAll(filepath.Join(root, archiveRoot), 0755); err != nil {
 			return nil, err
 		}
 		for j := 0; i+j < count && j < 100; j++ {
@@ -168,21 +168,21 @@ func changeManyFiles(drv graphdriver.Driver, layer string, count int, seed int64
 			case 0:
 				change.Path = filepath.Join(archiveRoot, fmt.Sprintf("file-%d", i+j))
 				change.Kind = archive.ChangeModify
-				if err := os.WriteFile(filepath.Join(string(root), change.Path), randomContent(64, seed+int64(i+j)), 0755); err != nil {
+				if err := os.WriteFile(filepath.Join(root, change.Path), randomContent(64, seed+int64(i+j)), 0755); err != nil {
 					return nil, err
 				}
 			// Add file
 			case 1:
 				change.Path = filepath.Join(archiveRoot, fmt.Sprintf("file-%d-%d", seed, i+j))
 				change.Kind = archive.ChangeAdd
-				if err := os.WriteFile(filepath.Join(string(root), change.Path), randomContent(64, seed+int64(i+j)), 0755); err != nil {
+				if err := os.WriteFile(filepath.Join(root, change.Path), randomContent(64, seed+int64(i+j)), 0755); err != nil {
 					return nil, err
 				}
 			// Remove file
 			case 2:
 				change.Path = filepath.Join(archiveRoot, fmt.Sprintf("file-%d", i+j))
 				change.Kind = archive.ChangeDelete
-				if err := os.Remove(filepath.Join(string(root), change.Path)); err != nil {
+				if err := os.Remove(filepath.Join(root, change.Path)); err != nil {
 					return nil, err
 				}
 			}
@@ -201,7 +201,7 @@ func checkManyFiles(drv graphdriver.Driver, layer string, count int, seed int64)
 	defer drv.Put(layer)
 
 	for i := 0; i < count; i += 100 {
-		dir := filepath.Join(string(root), fmt.Sprintf("directory-%d", i))
+		dir := filepath.Join(root, fmt.Sprintf("directory-%d", i))
 		for j := 0; i+j < count && j < 100; j++ {
 			file := filepath.Join(dir, fmt.Sprintf("file-%d", i+j))
 			fileContent, err := os.ReadFile(file)
@@ -254,10 +254,10 @@ func addLayerFiles(drv graphdriver.Driver, layer, parent string, i int) error {
 	}
 	defer drv.Put(layer)
 
-	if err := os.WriteFile(filepath.Join(string(root), "top-id"), []byte(layer), 0755); err != nil {
+	if err := os.WriteFile(filepath.Join(root, "top-id"), []byte(layer), 0755); err != nil {
 		return err
 	}
-	layerDir := filepath.Join(string(root), fmt.Sprintf("layer-%d", i))
+	layerDir := filepath.Join(root, fmt.Sprintf("layer-%d", i))
 	if err := os.MkdirAll(layerDir, 0755); err != nil {
 		return err
 	}
@@ -291,7 +291,7 @@ func checkManyLayers(drv graphdriver.Driver, layer string, count int) error {
 	}
 	defer drv.Put(layer)
 
-	layerIDBytes, err := os.ReadFile(filepath.Join(string(root), "top-id"))
+	layerIDBytes, err := os.ReadFile(filepath.Join(root, "top-id"))
 	if err != nil {
 		return err
 	}
@@ -301,7 +301,7 @@ func checkManyLayers(drv graphdriver.Driver, layer string, count int) error {
 	}
 
 	for i := count; i > 0; i-- {
-		layerDir := filepath.Join(string(root), fmt.Sprintf("layer-%d", i))
+		layerDir := filepath.Join(root, fmt.Sprintf("layer-%d", i))
 
 		thisLayerIDBytes, err := os.ReadFile(filepath.Join(layerDir, "layer-id"))
 		if err != nil {

daemon/graphdriver/graphtest/testutil_unix.go

@@ -45,11 +45,11 @@ func createBase(t testing.TB, driver graphdriver.Driver, name string) {
 	assert.NilError(t, err)
 	defer driver.Put(name)
 
-	subdir := filepath.Join(string(dirFS), "a subdir")
+	subdir := filepath.Join(dirFS, "a subdir")
 	assert.NilError(t, os.Mkdir(subdir, 0705|os.ModeSticky))
 	assert.NilError(t, contdriver.LocalDriver.Lchown(subdir, 1, 2))
 
-	file := filepath.Join(string(dirFS), "a file")
+	file := filepath.Join(dirFS, "a file")
 	err = os.WriteFile(file, []byte("Some data"), 0222|os.ModeSetuid)
 	assert.NilError(t, err)
 }
@@ -59,13 +59,13 @@ func verifyBase(t testing.TB, driver graphdriver.Driver, name string) {
 	assert.NilError(t, err)
 	defer driver.Put(name)
 
-	subdir := filepath.Join(string(dirFS), "a subdir")
+	subdir := filepath.Join(dirFS, "a subdir")
 	verifyFile(t, subdir, 0705|os.ModeDir|os.ModeSticky, 1, 2)
 
-	file := filepath.Join(string(dirFS), "a file")
+	file := filepath.Join(dirFS, "a file")
 	verifyFile(t, file, 0222|os.ModeSetuid, 0, 0)
 
-	files, err := readDir(string(dirFS))
+	files, err := readDir(dirFS)
 	assert.NilError(t, err)
 	assert.Check(t, is.Len(files, 2))
 }

daemon/graphdriver/overlay/overlay.go

@@ -349,12 +349,12 @@ func (d *Driver) Get(id, mountLabel string) (_ containerfs.ContainerFS, err erro
 	// If id has a root, just return it
 	rootDir := path.Join(dir, "root")
 	if _, err := os.Stat(rootDir); err == nil {
-		return containerfs.NewLocalContainerFS(rootDir), nil
+		return rootDir, nil
 	}
 
 	mergedDir := path.Join(dir, "merged")
 	if count := d.ctr.Increment(mergedDir); count > 1 {
-		return containerfs.NewLocalContainerFS(mergedDir), nil
+		return mergedDir, nil
 	}
 	defer func() {
 		if err != nil {
@@ -391,7 +391,7 @@ func (d *Driver) Get(id, mountLabel string) (_ containerfs.ContainerFS, err erro
 	if err := root.Chown(path.Join(workDir, "work")); err != nil {
 		return "", err
 	}
-	return containerfs.NewLocalContainerFS(mergedDir), nil
+	return mergedDir, nil
 }
 
 // Put unmounts the mount path created for the give id.

daemon/graphdriver/overlay2/overlay.go

@@ -526,14 +526,14 @@ func (d *Driver) Get(id, mountLabel string) (_ containerfs.ContainerFS, retErr e
 	if err != nil {
 		// If no lower, just return diff directory
 		if os.IsNotExist(err) {
-			return containerfs.NewLocalContainerFS(diffDir), nil
+			return diffDir, nil
 		}
 		return "", err
 	}
 
 	mergedDir := path.Join(dir, mergedDirName)
 	if count := d.ctr.Increment(mergedDir); count > 1 {
-		return containerfs.NewLocalContainerFS(mergedDir), nil
+		return mergedDir, nil
 	}
 	defer func() {
 		if retErr != nil {
@@ -613,7 +613,7 @@ func (d *Driver) Get(id, mountLabel string) (_ containerfs.ContainerFS, retErr e
 		}
 	}
 
-	return containerfs.NewLocalContainerFS(mergedDir), nil
+	return mergedDir, nil
 }
 
 // Put unmounts the mount path created for the give id.

daemon/graphdriver/proxy.go

@@ -141,7 +141,7 @@ func (d *graphDriverProxy) Get(id, mountLabel string) (containerfs.ContainerFS,
 	if ret.Err != "" {
 		err = errors.New(ret.Err)
 	}
-	return containerfs.NewLocalContainerFS(d.p.ScopedPath(ret.Dir)), err
+	return d.p.ScopedPath(ret.Dir), err
 }
 
 func (d *graphDriverProxy) Put(id string) error {

daemon/graphdriver/vfs/driver.go

@@ -172,7 +172,7 @@ func (d *Driver) create(id, parent string, size uint64) error {
 	if err != nil {
 		return fmt.Errorf("%s: %s", parent, err)
 	}
-	return CopyDir(string(parentDir), dir)
+	return CopyDir(parentDir, dir)
 }
 
 func (d *Driver) dir(id string) string {
@@ -192,7 +192,7 @@ func (d *Driver) Get(id, mountLabel string) (containerfs.ContainerFS, error) {
 	} else if !st.IsDir() {
 		return "", fmt.Errorf("%s: not a directory", dir)
 	}
-	return containerfs.NewLocalContainerFS(dir), nil
+	return dir, nil
 }
 
 // Put is a noop for vfs that return nil for the error, since this driver has no runtime resources to clean up.

daemon/graphdriver/windows/windows.go

@@ -402,7 +402,7 @@ func (d *Driver) Get(id, mountLabel string) (containerfs.ContainerFS, error) {
 		return "", err
 	}
 	if count := d.ctr.Increment(rID); count > 1 {
-		return containerfs.NewLocalContainerFS(d.cache[rID]), nil
+		return d.cache[rID], nil
 	}
 
 	// Getting the layer paths must be done outside of the lock.
@@ -447,7 +447,7 @@ func (d *Driver) Get(id, mountLabel string) (containerfs.ContainerFS, error) {
 		dir = d.dir(id)
 	}
 
-	return containerfs.NewLocalContainerFS(dir), nil
+	return dir, nil
 }
 
 // Put adds a new layer to the driver.
@@ -651,7 +651,7 @@ func (d *Driver) DiffSize(id, parent string) (size int64, err error) {
 	}
 	defer d.Put(id)
 
-	return archive.ChangesSize(string(layerFs), changes), nil
+	return archive.ChangesSize(layerFs, changes), nil
 }
 
 // GetMetadata returns custom driver information.

daemon/graphdriver/zfs/zfs.go

@@ -368,7 +368,7 @@ func (d *Driver) Get(id, mountLabel string) (_ containerfs.ContainerFS, retErr e
 	defer d.locker.Unlock(id)
 	mountpoint := d.mountPath(id)
 	if count := d.ctr.Increment(mountpoint); count > 1 {
-		return containerfs.NewLocalContainerFS(mountpoint), nil
+		return mountpoint, nil
 	}
 	defer func() {
 		if retErr != nil {
@@ -404,7 +404,7 @@ func (d *Driver) Get(id, mountLabel string) (_ containerfs.ContainerFS, retErr e
 		return "", fmt.Errorf("error modifying zfs mountpoint (%s) directory ownership: %v", mountpoint, err)
 	}
 
-	return containerfs.NewLocalContainerFS(mountpoint), nil
+	return mountpoint, nil
 }
 
 // Put removes the existing mountpoint for the given id if it exists.

daemon/initlayer/setup_unix.go

@@ -20,7 +20,7 @@ import (
 // the container from unwanted side-effects on the rw layer.
 func Setup(initLayerFs containerfs.ContainerFS, rootIdentity idtools.Identity) error {
 	// Since all paths are local to the container, we can just extract initLayerFs.Path()
-	initLayer := string(initLayerFs)
+	initLayer := initLayerFs
 
 	for pth, typ := range map[string]string{
 		"/dev/pts":         "dir",

daemon/list_windows.go

@@ -9,7 +9,7 @@ import (
 // excludeByIsolation is a platform specific helper function to support PS
 // filtering by Isolation. This is a Windows-only concept, so is a no-op on Unix.
 func excludeByIsolation(container *container.Snapshot, ctx *listContext) iterationAction {
-	i := strings.ToLower(string(container.HostConfig.Isolation))
+	i := strings.ToLower(container.HostConfig.Isolation)
 	if i == "" {
 		i = "default"
 	}

daemon/oci_linux.go

@@ -730,7 +730,7 @@ func WithCommonOptions(daemon *Daemon, c *container.Container) coci.SpecOpts {
 		}
 		if !daemon.UsesSnapshotter() {
 			s.Root = &specs.Root{
-				Path:     string(c.BaseFS),
+				Path:     c.BaseFS,
 				Readonly: c.HostConfig.ReadonlyRootfs,
 			}
 		}

daemon/oci_linux_test.go

@@ -10,7 +10,6 @@ import (
 	"github.com/docker/docker/daemon/config"
 	"github.com/docker/docker/daemon/network"
 	"github.com/docker/docker/libnetwork"
-	"github.com/docker/docker/pkg/containerfs"
 	"gotest.tools/v3/assert"
 	is "gotest.tools/v3/assert/cmp"
 	"gotest.tools/v3/skip"
@@ -36,7 +35,7 @@ func setupFakeDaemon(t *testing.T, c *container.Container) *Daemon {
 	}
 
 	c.Root = root
-	c.BaseFS = containerfs.NewLocalContainerFS(rootfs)
+	c.BaseFS = rootfs
 
 	if c.Config == nil {
 		c.Config = new(containertypes.Config)

daemon/oci_windows.go

@@ -240,7 +240,7 @@ func (daemon *Daemon) createSpecWindowsFields(c *container.Container, s *specs.S
 			return errors.New("createSpecWindowsFields: BaseFS of container " + c.ID + " is unexpectedly empty")
 		}
 
-		s.Root.Path = string(c.BaseFS) // This is not set for Hyper-V containers
+		s.Root.Path = c.BaseFS // This is not set for Hyper-V containers
 		if !strings.HasSuffix(s.Root.Path, `\`) {
 			s.Root.Path = s.Root.Path + `\` // Ensure a correctly formatted volume GUID path \\?\Volume{GUID}\
 		}

integration/plugin/graphdriver/external_test.go

@@ -219,7 +219,7 @@ func setupPlugin(t *testing.T, ec map[string]*graphEventsCounter, ext string, mu
 			respond(w, err)
 			return
 		}
-		respond(w, &graphDriverResponse{Dir: string(dir)})
+		respond(w, &graphDriverResponse{Dir: dir})
 	})
 
 	mux.HandleFunc("/GraphDriver.Put", func(w http.ResponseWriter, r *http.Request) {

layer/layer_store.go

@@ -786,5 +786,5 @@ func (n *naiveDiffPathDriver) DiffGetter(id string) (graphdriver.FileGetCloser,
 	if err != nil {
 		return nil, err
 	}
-	return &fileGetPutter{storage.NewPathFileGetter(string(p)), n.Driver, id}, nil
+	return &fileGetPutter{storage.NewPathFileGetter(p), n.Driver, id}, nil
 }

layer/layer_test.go

@@ -139,7 +139,7 @@ func newTestFile(name string, content []byte, perm os.FileMode) FileApplier {
 }
 
 func (tf *testFile) ApplyFile(root containerfs.ContainerFS) error {
-	fullPath := filepath.Join(string(root), tf.name)
+	fullPath := filepath.Join(root, tf.name)
 	if err := os.MkdirAll(filepath.Dir(fullPath), 0755); err != nil {
 		return err
 	}
@@ -267,7 +267,7 @@ func TestMountAndRegister(t *testing.T) {
 		t.Fatal(err)
 	}
 
-	b, err := os.ReadFile(filepath.Join(string(path2), "testfile.txt"))
+	b, err := os.ReadFile(filepath.Join(path2, "testfile.txt"))
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -375,7 +375,7 @@ func TestStoreRestore(t *testing.T) {
 		t.Fatal(err)
 	}
 
-	if err := os.WriteFile(filepath.Join(string(pathFS), "testfile.txt"), []byte("nothing here"), 0644); err != nil {
+	if err := os.WriteFile(filepath.Join(pathFS, "testfile.txt"), []byte("nothing here"), 0644); err != nil {
 		t.Fatal(err)
 	}
 
@@ -409,20 +409,20 @@ func TestStoreRestore(t *testing.T) {
 
 	if mountPath, err := m2.Mount(""); err != nil {
 		t.Fatal(err)
-	} else if string(pathFS) != string(mountPath) {
+	} else if pathFS != mountPath {
-		t.Fatalf("Unexpected path %s, expected %s", string(mountPath), string(pathFS))
+		t.Fatalf("Unexpected path %s, expected %s", mountPath, pathFS)
 	}
 
 	if mountPath, err := m2.Mount(""); err != nil {
 		t.Fatal(err)
-	} else if string(pathFS) != string(mountPath) {
+	} else if pathFS != mountPath {
-		t.Fatalf("Unexpected path %s, expected %s", string(mountPath), string(pathFS))
+		t.Fatalf("Unexpected path %s, expected %s", mountPath, pathFS)
 	}
 	if err := m2.Unmount(); err != nil {
 		t.Fatal(err)
 	}
 
-	b, err := os.ReadFile(filepath.Join(string(pathFS), "testfile.txt"))
+	b, err := os.ReadFile(filepath.Join(pathFS, "testfile.txt"))
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -597,7 +597,7 @@ func tarFromFiles(files ...FileApplier) ([]byte, error) {
 	defer os.RemoveAll(td)
 
 	for _, f := range files {
-		if err := f.ApplyFile(containerfs.NewLocalContainerFS(td)); err != nil {
+		if err := f.ApplyFile(td); err != nil {
 			return nil, err
 		}
 	}

layer/layer_windows.go

@@ -37,7 +37,7 @@ func GetLayerPath(s Store, layer ChainID) (string, error) {
 		return "", err
 	}
 
-	return string(path), nil
+	return path, nil
 }
 
 func (ls *layerStore) mountID(name string) string {

layer/mount_test.go

@@ -47,12 +47,12 @@ func TestMountInit(t *testing.T) {
 		t.Fatal(err)
 	}
 
-	fi, err := os.Stat(filepath.Join(string(pathFS), "testfile.txt"))
+	fi, err := os.Stat(filepath.Join(pathFS, "testfile.txt"))
 	if err != nil {
 		t.Fatal(err)
 	}
 
-	f, err := os.Open(filepath.Join(string(pathFS), "testfile.txt"))
+	f, err := os.Open(filepath.Join(pathFS, "testfile.txt"))
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -107,7 +107,7 @@ func TestMountSize(t *testing.T) {
 		t.Fatal(err)
 	}
 
-	if err := os.WriteFile(filepath.Join(string(pathFS), "file2"), content2, 0755); err != nil {
+	if err := os.WriteFile(filepath.Join(pathFS, "file2"), content2, 0755); err != nil {
 		t.Fatal(err)
 	}
 
@@ -159,23 +159,23 @@ func TestMountChanges(t *testing.T) {
 		t.Fatal(err)
 	}
 
-	if err := driver.LocalDriver.Lchmod(filepath.Join(string(pathFS), "testfile1.txt"), 0755); err != nil {
+	if err := driver.LocalDriver.Lchmod(filepath.Join(pathFS, "testfile1.txt"), 0755); err != nil {
 		t.Fatal(err)
 	}
 
-	if err := os.WriteFile(filepath.Join(string(pathFS), "testfile1.txt"), []byte("mount data!"), 0755); err != nil {
+	if err := os.WriteFile(filepath.Join(pathFS, "testfile1.txt"), []byte("mount data!"), 0755); err != nil {
 		t.Fatal(err)
 	}
 
-	if err := os.Remove(filepath.Join(string(pathFS), "testfile2.txt")); err != nil {
+	if err := os.Remove(filepath.Join(pathFS, "testfile2.txt")); err != nil {
 		t.Fatal(err)
 	}
 
-	if err := driver.LocalDriver.Lchmod(filepath.Join(string(pathFS), "testfile3.txt"), 0755); err != nil {
+	if err := driver.LocalDriver.Lchmod(filepath.Join(pathFS, "testfile3.txt"), 0755); err != nil {
 		t.Fatal(err)
 	}
 
-	if err := os.WriteFile(filepath.Join(string(pathFS), "testfile4.txt"), []byte("mount data!"), 0644); err != nil {
+	if err := os.WriteFile(filepath.Join(pathFS, "testfile4.txt"), []byte("mount data!"), 0644); err != nil {
 		t.Fatal(err)
 	}
 
@@ -250,7 +250,7 @@ func TestMountApply(t *testing.T) {
 		t.Fatal(err)
 	}
 
-	f, err := os.Open(filepath.Join(string(pathFS), "newfile.txt"))
+	f, err := os.Open(filepath.Join(pathFS, "newfile.txt"))
 	if err != nil {
 		t.Fatal(err)
 	}

libnetwork/ipam/structures.go

@@ -186,7 +186,7 @@ func (aSpace *addrSpace) UnmarshalJSON(data []byte) error {
 
 	aSpace.scope = datastore.LocalScope
 	s := m["Scope"].(string)
-	if s == string(datastore.GlobalScope) {
+	if s == datastore.GlobalScope {
 		aSpace.scope = datastore.GlobalScope
 	}
 

pkg/containerfs/containerfs.go

@@ -7,13 +7,7 @@ import (
 )
 
 // ContainerFS is that represents a root file system
-type ContainerFS string
+type ContainerFS = string
-
-// NewLocalContainerFS is a helper function to implement daemon's Mount interface
-// when the graphdriver mount point is a local path on the machine.
-func NewLocalContainerFS(path string) ContainerFS {
-	return ContainerFS(path)
-}
 
 // ResolveScopedPath evaluates the given path scoped to the root.
 // For example, if root=/a, and path=/b/c, then this function would return /a/b/c.

plugin/manager_linux.go

@@ -12,7 +12,6 @@ import (
 	"github.com/docker/docker/api/types"
 	"github.com/docker/docker/daemon/initlayer"
 	"github.com/docker/docker/errdefs"
-	"github.com/docker/docker/pkg/containerfs"
 	"github.com/docker/docker/pkg/idtools"
 	"github.com/docker/docker/pkg/plugins"
 	"github.com/docker/docker/pkg/stringid"
@@ -55,7 +54,7 @@ func (pm *Manager) enable(p *v2.Plugin, c *controller, force bool) error {
 		}
 	}
 
-	rootFS := containerfs.NewLocalContainerFS(filepath.Join(pm.config.Root, p.PluginObj.ID, rootFSFileName))
+	rootFS := filepath.Join(pm.config.Root, p.PluginObj.ID, rootFSFileName)
 	if err := initlayer.Setup(rootFS, idtools.Identity{UID: 0, GID: 0}); err != nil {
 		return errors.WithStack(err)
 	}