1 files changed, 0 insertions, 183 deletions
diff --git a/pkg/sentry/fs/copy_up_test.go b/pkg/sentry/fs/copy_up_test.go
deleted file mode 100644
index 1d80bf15a..000000000
--- a/pkg/sentry/fs/copy_up_test.go
+++ /dev/null
@@ -1,183 +0,0 @@
-// Copyright 2018 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 fs_test
-
-import (
-	"bytes"
-	"crypto/rand"
-	"fmt"
-	"io"
-	"sync"
-	"testing"
-
-	"gvisor.dev/gvisor/pkg/sentry/fs"
-	_ "gvisor.dev/gvisor/pkg/sentry/fs/tmpfs"
-	"gvisor.dev/gvisor/pkg/sentry/kernel/contexttest"
-	"gvisor.dev/gvisor/pkg/sentry/usermem"
-)
-
-const (
-	// origFileSize is the original file size. This many bytes should be
-	// copied up before the test file is modified.
-	origFileSize = 4096
-
-	// truncatedFileSize is the size to truncate all test files.
-	truncateFileSize = 10
-)
-
-// TestConcurrentCopyUp is a copy up stress test for an overlay.
-//
-// It creates a 64-level deep directory tree in the lower filesystem and
-// populates the last subdirectory with 64 files containing random content:
-//
-//    /lower
-//      /sudir0/.../subdir63/
-//                     /file0
-//                     ...
-//                     /file63
-//
-// The files are truncated concurrently by 4 goroutines per file.
-// These goroutines contend with copying up all parent 64 subdirectories
-// as well as the final file content.
-//
-// At the end of the test, we assert that the files respect the new truncated
-// size and contain the content we expect.
-func TestConcurrentCopyUp(t *testing.T) {
-	ctx := contexttest.Context(t)
-	files := makeOverlayTestFiles(t)
-
-	var wg sync.WaitGroup
-	for _, file := range files {
-		for i := 0; i < 4; i++ {
-			wg.Add(1)
-			go func(o *overlayTestFile) {
-				if err := o.File.Dirent.Inode.Truncate(ctx, o.File.Dirent, truncateFileSize); err != nil {
-					t.Fatalf("failed to copy up: %v", err)
-				}
-				wg.Done()
-			}(file)
-		}
-	}
-	wg.Wait()
-
-	for _, file := range files {
-		got := make([]byte, origFileSize)
-		n, err := file.File.Readv(ctx, usermem.BytesIOSequence(got))
-		if int(n) != truncateFileSize {
-			t.Fatalf("read %d bytes from file, want %d", n, truncateFileSize)
-		}
-		if err != nil && err != io.EOF {
-			t.Fatalf("read got error %v, want nil", err)
-		}
-		if !bytes.Equal(got[:n], file.content[:truncateFileSize]) {
-			t.Fatalf("file content is %v, want %v", got[:n], file.content[:truncateFileSize])
-		}
-	}
-}
-
-type overlayTestFile struct {
-	File    *fs.File
-	name    string
-	content []byte
-}
-
-func makeOverlayTestFiles(t *testing.T) []*overlayTestFile {
-	ctx := contexttest.Context(t)
-
-	// Create a lower tmpfs mount.
-	fsys, _ := fs.FindFilesystem("tmpfs")
-	lower, err := fsys.Mount(contexttest.Context(t), "", fs.MountSourceFlags{}, "", nil)
-	if err != nil {
-		t.Fatalf("failed to mount tmpfs: %v", err)
-	}
-	lowerRoot := fs.NewDirent(ctx, lower, "")
-
-	// Make a deep set of subdirectories that everyone shares.
-	next := lowerRoot
-	for i := 0; i < 64; i++ {
-		name := fmt.Sprintf("subdir%d", i)
-		err := next.CreateDirectory(ctx, lowerRoot, name, fs.FilePermsFromMode(0777))
-		if err != nil {
-			t.Fatalf("failed to create dir %q: %v", name, err)
-		}
-		next, err = next.Walk(ctx, lowerRoot, name)
-		if err != nil {
-			t.Fatalf("failed to walk to %q: %v", name, err)
-		}
-	}
-
-	// Make a bunch of files in the last directory.
-	var files []*overlayTestFile
-	for i := 0; i < 64; i++ {
-		name := fmt.Sprintf("file%d", i)
-		f, err := next.Create(ctx, next, name, fs.FileFlags{Read: true, Write: true}, fs.FilePermsFromMode(0666))
-		if err != nil {
-			t.Fatalf("failed to create file %q: %v", name, err)
-		}
-		defer f.DecRef()
-
-		relname, _ := f.Dirent.FullName(lowerRoot)
-
-		o := &overlayTestFile{
-			name:    relname,
-			content: make([]byte, origFileSize),
-		}
-
-		if _, err := rand.Read(o.content); err != nil {
-			t.Fatalf("failed to read from /dev/urandom: %v", err)
-		}
-
-		if _, err := f.Writev(ctx, usermem.BytesIOSequence(o.content)); err != nil {
-			t.Fatalf("failed to write content to file %q: %v", name, err)
-		}
-
-		files = append(files, o)
-	}
-
-	// Create an empty upper tmpfs mount which we will copy up into.
-	upper, err := fsys.Mount(ctx, "", fs.MountSourceFlags{}, "", nil)
-	if err != nil {
-		t.Fatalf("failed to mount tmpfs: %v", err)
-	}
-
-	// Construct an overlay root.
-	overlay, err := fs.NewOverlayRoot(ctx, upper, lower, fs.MountSourceFlags{})
-	if err != nil {
-		t.Fatalf("failed to construct overlay root: %v", err)
-	}
-
-	// Create a MountNamespace to traverse the file system.
-	mns, err := fs.NewMountNamespace(ctx, overlay)
-	if err != nil {
-		t.Fatalf("failed to construct mount manager: %v", err)
-	}
-
-	// Walk to all of the files in the overlay, open them readable.
-	for _, f := range files {
-		maxTraversals := uint(0)
-		d, err := mns.FindInode(ctx, mns.Root(), mns.Root(), f.name, &maxTraversals)
-		if err != nil {
-			t.Fatalf("failed to find %q: %v", f.name, err)
-		}
-		defer d.DecRef()
-
-		f.File, err = d.Inode.GetFile(ctx, d, fs.FileFlags{Read: true})
-		if err != nil {
-			t.Fatalf("failed to open file %q readable: %v", f.name, err)
-		}
-	}
-
-	return files
-}