1 files changed, 0 insertions, 281 deletions
diff --git a/pkg/sentry/fsimpl/testutil/testutil.go b/pkg/sentry/fsimpl/testutil/testutil.go
deleted file mode 100644
index 2a723a89f..000000000
--- a/pkg/sentry/fsimpl/testutil/testutil.go
+++ /dev/null
@@ -1,281 +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 testutil provides common test utilities for kernfs-based
-// filesystems.
-package testutil
-
-import (
-	"fmt"
-	"io"
-	"strings"
-	"testing"
-
-	"github.com/google/go-cmp/cmp"
-	"gvisor.dev/gvisor/pkg/abi/linux"
-	"gvisor.dev/gvisor/pkg/fspath"
-	"gvisor.dev/gvisor/pkg/sentry/context"
-	"gvisor.dev/gvisor/pkg/sentry/kernel/auth"
-	"gvisor.dev/gvisor/pkg/sentry/usermem"
-	"gvisor.dev/gvisor/pkg/sentry/vfs"
-	"gvisor.dev/gvisor/pkg/sync"
-)
-
-// System represents the context for a single test.
-//
-// Test systems must be explicitly destroyed with System.Destroy.
-type System struct {
-	t     *testing.T
-	Ctx   context.Context
-	Creds *auth.Credentials
-	VFS   *vfs.VirtualFilesystem
-	Root  vfs.VirtualDentry
-	mns   *vfs.MountNamespace
-}
-
-// NewSystem constructs a System.
-//
-// Precondition: Caller must hold a reference on mns, whose ownership
-// is transferred to the new System.
-func NewSystem(ctx context.Context, t *testing.T, v *vfs.VirtualFilesystem, mns *vfs.MountNamespace) *System {
-	s := &System{
-		t:     t,
-		Ctx:   ctx,
-		Creds: auth.CredentialsFromContext(ctx),
-		VFS:   v,
-		mns:   mns,
-		Root:  mns.Root(),
-	}
-	return s
-}
-
-// WithSubtest creates a temporary test system with a new test harness,
-// referencing all other resources from the original system. This is useful when
-// a system is reused for multiple subtests, and the T needs to change for each
-// case. Note that this is safe when test cases run in parallel, as all
-// resources referenced by the system are immutable, or handle interior
-// mutations in a thread-safe manner.
-//
-// The returned system must not outlive the original and should not be destroyed
-// via System.Destroy.
-func (s *System) WithSubtest(t *testing.T) *System {
-	return &System{
-		t:     t,
-		Ctx:   s.Ctx,
-		Creds: s.Creds,
-		VFS:   s.VFS,
-		mns:   s.mns,
-		Root:  s.Root,
-	}
-}
-
-// WithTemporaryContext constructs a temporary test system with a new context
-// ctx. The temporary system borrows all resources and references from the
-// original system. The returned temporary system must not outlive the original
-// system, and should not be destroyed via System.Destroy.
-func (s *System) WithTemporaryContext(ctx context.Context) *System {
-	return &System{
-		t:     s.t,
-		Ctx:   ctx,
-		Creds: s.Creds,
-		VFS:   s.VFS,
-		mns:   s.mns,
-		Root:  s.Root,
-	}
-}
-
-// Destroy release resources associated with a test system.
-func (s *System) Destroy() {
-	s.Root.DecRef()
-	s.mns.DecRef(s.VFS) // Reference on mns passed to NewSystem.
-}
-
-// ReadToEnd reads the contents of fd until EOF to a string.
-func (s *System) ReadToEnd(fd *vfs.FileDescription) (string, error) {
-	buf := make([]byte, usermem.PageSize)
-	bufIOSeq := usermem.BytesIOSequence(buf)
-	opts := vfs.ReadOptions{}
-
-	var content strings.Builder
-	for {
-		n, err := fd.Read(s.Ctx, bufIOSeq, opts)
-		if n == 0 || err != nil {
-			if err == io.EOF {
-				err = nil
-			}
-			return content.String(), err
-		}
-		content.Write(buf[:n])
-	}
-}
-
-// PathOpAtRoot constructs a PathOperation with the given path from
-// the root of the filesystem.
-func (s *System) PathOpAtRoot(path string) *vfs.PathOperation {
-	return &vfs.PathOperation{
-		Root:  s.Root,
-		Start: s.Root,
-		Path:  fspath.Parse(path),
-	}
-}
-
-// GetDentryOrDie attempts to resolve a dentry referred to by the
-// provided path operation. If unsuccessful, the test fails.
-func (s *System) GetDentryOrDie(pop *vfs.PathOperation) vfs.VirtualDentry {
-	vd, err := s.VFS.GetDentryAt(s.Ctx, s.Creds, pop, &vfs.GetDentryOptions{})
-	if err != nil {
-		s.t.Fatalf("GetDentryAt(pop:%+v) failed: %v", pop, err)
-	}
-	return vd
-}
-
-// DirentType is an alias for values for linux_dirent64.d_type.
-type DirentType = uint8
-
-// ListDirents lists the Dirents for a directory at pop.
-func (s *System) ListDirents(pop *vfs.PathOperation) *DirentCollector {
-	fd, err := s.VFS.OpenAt(s.Ctx, s.Creds, pop, &vfs.OpenOptions{Flags: linux.O_RDONLY})
-	if err != nil {
-		s.t.Fatalf("OpenAt for PathOperation %+v failed: %v", pop, err)
-	}
-	defer fd.DecRef()
-
-	collector := &DirentCollector{}
-	if err := fd.IterDirents(s.Ctx, collector); err != nil {
-		s.t.Fatalf("IterDirent failed: %v", err)
-	}
-	return collector
-}
-
-// AssertAllDirentTypes verifies that the set of dirents in collector contains
-// exactly the specified set of expected entries. AssertAllDirentTypes respects
-// collector.skipDots, and implicitly checks for "." and ".." accordingly.
-func (s *System) AssertAllDirentTypes(collector *DirentCollector, expected map[string]DirentType) {
-	// Also implicitly check for "." and "..", if enabled.
-	if !collector.skipDots {
-		expected["."] = linux.DT_DIR
-		expected[".."] = linux.DT_DIR
-	}
-
-	dentryTypes := make(map[string]DirentType)
-	collector.mu.Lock()
-	for _, dirent := range collector.dirents {
-		dentryTypes[dirent.Name] = dirent.Type
-	}
-	collector.mu.Unlock()
-	if diff := cmp.Diff(expected, dentryTypes); diff != "" {
-		s.t.Fatalf("IterDirent had unexpected results:\n--- want\n+++ got\n%v", diff)
-	}
-}
-
-// AssertDirentOffsets verifies that collector contains at least the entries
-// specified in expected, with the given NextOff field. Entries specified in
-// expected but missing from collector result in failure. Extra entries in
-// collector are ignored. AssertDirentOffsets respects collector.skipDots, and
-// implicitly checks for "." and ".." accordingly.
-func (s *System) AssertDirentOffsets(collector *DirentCollector, expected map[string]int64) {
-	// Also implicitly check for "." and "..", if enabled.
-	if !collector.skipDots {
-		expected["."] = 1
-		expected[".."] = 2
-	}
-
-	dentryNextOffs := make(map[string]int64)
-	collector.mu.Lock()
-	for _, dirent := range collector.dirents {
-		// Ignore extra entries in dentries that are not in expected.
-		if _, ok := expected[dirent.Name]; ok {
-			dentryNextOffs[dirent.Name] = dirent.NextOff
-		}
-	}
-	collector.mu.Unlock()
-	if diff := cmp.Diff(expected, dentryNextOffs); diff != "" {
-		s.t.Fatalf("IterDirent had unexpected results:\n--- want\n+++ got\n%v", diff)
-	}
-}
-
-// DirentCollector provides an implementation for vfs.IterDirentsCallback for
-// testing. It simply iterates to the end of a given directory FD and collects
-// all dirents emitted by the callback.
-type DirentCollector struct {
-	mu      sync.Mutex
-	order   []*vfs.Dirent
-	dirents map[string]*vfs.Dirent
-	// When the collector is used in various Assert* functions, should "." and
-	// ".." be implicitly checked?
-	skipDots bool
-}
-
-// SkipDotsChecks enables or disables the implicit checks on "." and ".." when
-// the collector is used in various Assert* functions. Note that "." and ".."
-// are still collected if passed to d.Handle, so the caller should only disable
-// the checks when they aren't expected.
-func (d *DirentCollector) SkipDotsChecks(value bool) {
-	d.skipDots = value
-}
-
-// Handle implements vfs.IterDirentsCallback.Handle.
-func (d *DirentCollector) Handle(dirent vfs.Dirent) bool {
-	d.mu.Lock()
-	if d.dirents == nil {
-		d.dirents = make(map[string]*vfs.Dirent)
-	}
-	d.order = append(d.order, &dirent)
-	d.dirents[dirent.Name] = &dirent
-	d.mu.Unlock()
-	return true
-}
-
-// Count returns the number of dirents currently in the collector.
-func (d *DirentCollector) Count() int {
-	d.mu.Lock()
-	defer d.mu.Unlock()
-	return len(d.dirents)
-}
-
-// Contains checks whether the collector has a dirent with the given name and
-// type.
-func (d *DirentCollector) Contains(name string, typ uint8) error {
-	d.mu.Lock()
-	defer d.mu.Unlock()
-	dirent, ok := d.dirents[name]
-	if !ok {
-		return fmt.Errorf("No dirent named %q found", name)
-	}
-	if dirent.Type != typ {
-		return fmt.Errorf("Dirent named %q found, but was expecting type %s, got: %+v", name, linux.DirentType.Parse(uint64(typ)), dirent)
-	}
-	return nil
-}
-
-// Dirents returns all dirents discovered by this collector.
-func (d *DirentCollector) Dirents() map[string]*vfs.Dirent {
-	d.mu.Lock()
-	dirents := make(map[string]*vfs.Dirent)
-	for n, d := range d.dirents {
-		dirents[n] = d
-	}
-	d.mu.Unlock()
-	return dirents
-}
-
-// OrderedDirents returns an ordered list of dirents as discovered by this
-// collector.
-func (d *DirentCollector) OrderedDirents() []*vfs.Dirent {
-	d.mu.Lock()
-	dirents := make([]*vfs.Dirent, len(d.order))
-	copy(dirents, d.order)
-	d.mu.Unlock()
-	return dirents
-}