1 files changed, 0 insertions, 418 deletions
diff --git a/pkg/sentry/fs/dirent_refs_test.go b/pkg/sentry/fs/dirent_refs_test.go
deleted file mode 100644
index 884e3ff06..000000000
--- a/pkg/sentry/fs/dirent_refs_test.go
+++ /dev/null
@@ -1,418 +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
-
-import (
-	"syscall"
-	"testing"
-
-	"gvisor.dev/gvisor/pkg/sentry/context"
-	"gvisor.dev/gvisor/pkg/sentry/context/contexttest"
-)
-
-func newMockDirInode(ctx context.Context, cache *DirentCache) *Inode {
-	return NewMockInode(ctx, NewMockMountSource(cache), StableAttr{Type: Directory})
-}
-
-func TestWalkPositive(t *testing.T) {
-	// refs == 0 -> one reference.
-	// refs == -1 -> has been destroyed.
-
-	ctx := contexttest.Context(t)
-	root := NewDirent(ctx, newMockDirInode(ctx, nil), "root")
-
-	if got := root.ReadRefs(); got != 1 {
-		t.Fatalf("root has a ref count of %d, want %d", got, 1)
-	}
-
-	name := "d"
-	d, err := root.walk(ctx, root, name, false)
-	if err != nil {
-		t.Fatalf("root.walk(root, %q) got %v, want nil", name, err)
-	}
-
-	if got := root.ReadRefs(); got != 2 {
-		t.Fatalf("root has a ref count of %d, want %d", got, 2)
-	}
-
-	if got := d.ReadRefs(); got != 1 {
-		t.Fatalf("child name = %q has a ref count of %d, want %d", d.name, got, 1)
-	}
-
-	d.DecRef()
-
-	if got := root.ReadRefs(); got != 1 {
-		t.Fatalf("root has a ref count of %d, want %d", got, 1)
-	}
-
-	if got := d.ReadRefs(); got != 0 {
-		t.Fatalf("child name = %q has a ref count of %d, want %d", d.name, got, 0)
-	}
-
-	root.flush()
-
-	if got := len(root.children); got != 0 {
-		t.Fatalf("root has %d children, want %d", got, 0)
-	}
-}
-
-func TestWalkNegative(t *testing.T) {
-	// refs == 0 -> one reference.
-	// refs == -1 -> has been destroyed.
-
-	ctx := contexttest.Context(t)
-	root := NewDirent(ctx, NewEmptyDir(ctx, nil), "root")
-	mn := root.Inode.InodeOperations.(*mockInodeOperationsLookupNegative)
-
-	if got := root.ReadRefs(); got != 1 {
-		t.Fatalf("root has a ref count of %d, want %d", got, 1)
-	}
-
-	name := "d"
-	for i := 0; i < 100; i++ {
-		_, err := root.walk(ctx, root, name, false)
-		if err != syscall.ENOENT {
-			t.Fatalf("root.walk(root, %q) got %v, want %v", name, err, syscall.ENOENT)
-		}
-	}
-
-	if got := root.ReadRefs(); got != 1 {
-		t.Fatalf("root has a ref count of %d, want %d", got, 1)
-	}
-
-	if got := len(root.children); got != 1 {
-		t.Fatalf("root has %d children, want %d", got, 1)
-	}
-
-	w, ok := root.children[name]
-	if !ok {
-		t.Fatalf("root wants child at %q", name)
-	}
-
-	child := w.Get()
-	if child == nil {
-		t.Fatalf("root wants to resolve weak reference")
-	}
-
-	if !child.(*Dirent).IsNegative() {
-		t.Fatalf("root found positive child at %q, want negative", name)
-	}
-
-	if got := child.(*Dirent).ReadRefs(); got != 2 {
-		t.Fatalf("child has a ref count of %d, want %d", got, 2)
-	}
-
-	child.DecRef()
-
-	if got := child.(*Dirent).ReadRefs(); got != 1 {
-		t.Fatalf("child has a ref count of %d, want %d", got, 1)
-	}
-
-	if got := len(root.children); got != 1 {
-		t.Fatalf("root has %d children, want %d", got, 1)
-	}
-
-	root.DecRef()
-
-	if got := root.ReadRefs(); got != 0 {
-		t.Fatalf("root has a ref count of %d, want %d", got, 0)
-	}
-
-	AsyncBarrier()
-
-	if got := mn.releaseCalled; got != true {
-		t.Fatalf("root.Close was called %v, want true", got)
-	}
-}
-
-type mockInodeOperationsLookupNegative struct {
-	*MockInodeOperations
-	releaseCalled bool
-}
-
-func NewEmptyDir(ctx context.Context, cache *DirentCache) *Inode {
-	m := NewMockMountSource(cache)
-	return NewInode(ctx, &mockInodeOperationsLookupNegative{
-		MockInodeOperations: NewMockInodeOperations(ctx),
-	}, m, StableAttr{Type: Directory})
-}
-
-func (m *mockInodeOperationsLookupNegative) Lookup(ctx context.Context, dir *Inode, p string) (*Dirent, error) {
-	return NewNegativeDirent(p), nil
-}
-
-func (m *mockInodeOperationsLookupNegative) Release(context.Context) {
-	m.releaseCalled = true
-}
-
-func TestHashNegativeToPositive(t *testing.T) {
-	// refs == 0 -> one reference.
-	// refs == -1 -> has been destroyed.
-
-	ctx := contexttest.Context(t)
-	root := NewDirent(ctx, NewEmptyDir(ctx, nil), "root")
-
-	name := "d"
-	_, err := root.walk(ctx, root, name, false)
-	if err != syscall.ENOENT {
-		t.Fatalf("root.walk(root, %q) got %v, want %v", name, err, syscall.ENOENT)
-	}
-
-	if got := root.exists(ctx, root, name); got != false {
-		t.Fatalf("got %q exists, want does not exist", name)
-	}
-
-	f, err := root.Create(ctx, root, name, FileFlags{}, FilePermissions{})
-	if err != nil {
-		t.Fatalf("root.Create(%q, _), got error %v, want nil", name, err)
-	}
-	d := f.Dirent
-
-	if d.IsNegative() {
-		t.Fatalf("got negative Dirent, want positive")
-	}
-
-	if got := d.ReadRefs(); got != 1 {
-		t.Fatalf("child %q has a ref count of %d, want %d", name, got, 1)
-	}
-
-	if got := root.ReadRefs(); got != 2 {
-		t.Fatalf("root has a ref count of %d, want %d", got, 2)
-	}
-
-	if got := len(root.children); got != 1 {
-		t.Fatalf("got %d children, want %d", got, 1)
-	}
-
-	w, ok := root.children[name]
-	if !ok {
-		t.Fatalf("failed to find weak reference to %q", name)
-	}
-
-	child := w.Get()
-	if child == nil {
-		t.Fatalf("want to resolve weak reference")
-	}
-
-	if child.(*Dirent) != d {
-		t.Fatalf("got foreign child")
-	}
-}
-
-func TestRevalidate(t *testing.T) {
-	// refs == 0 -> one reference.
-	// refs == -1 -> has been destroyed.
-
-	for _, test := range []struct {
-		// desc is the test's description.
-		desc string
-
-		// Whether to make negative Dirents.
-		makeNegative bool
-	}{
-		{
-			desc:         "Revalidate negative Dirent",
-			makeNegative: true,
-		},
-		{
-			desc:         "Revalidate positive Dirent",
-			makeNegative: false,
-		},
-	} {
-		t.Run(test.desc, func(t *testing.T) {
-			ctx := contexttest.Context(t)
-			root := NewDirent(ctx, NewMockInodeRevalidate(ctx, test.makeNegative), "root")
-
-			name := "d"
-			d1, err := root.walk(ctx, root, name, false)
-			if !test.makeNegative && err != nil {
-				t.Fatalf("root.walk(root, %q) got %v, want nil", name, err)
-			}
-			d2, err := root.walk(ctx, root, name, false)
-			if !test.makeNegative && err != nil {
-				t.Fatalf("root.walk(root, %q) got %v, want nil", name, err)
-			}
-			if !test.makeNegative && d1 == d2 {
-				t.Fatalf("revalidating walk got same *Dirent, want different")
-			}
-			if got := len(root.children); got != 1 {
-				t.Errorf("revalidating walk got %d children, want %d", got, 1)
-			}
-		})
-	}
-}
-
-type MockInodeOperationsRevalidate struct {
-	*MockInodeOperations
-	makeNegative bool
-}
-
-func NewMockInodeRevalidate(ctx context.Context, makeNegative bool) *Inode {
-	mn := NewMockInodeOperations(ctx)
-	m := NewMockMountSource(nil)
-	m.MountSourceOperations.(*MockMountSourceOps).revalidate = true
-	return NewInode(ctx, &MockInodeOperationsRevalidate{MockInodeOperations: mn, makeNegative: makeNegative}, m, StableAttr{Type: Directory})
-}
-
-func (m *MockInodeOperationsRevalidate) Lookup(ctx context.Context, dir *Inode, p string) (*Dirent, error) {
-	if !m.makeNegative {
-		return m.MockInodeOperations.Lookup(ctx, dir, p)
-	}
-	return NewNegativeDirent(p), nil
-}
-
-func TestCreateExtraRefs(t *testing.T) {
-	// refs == 0 -> one reference.
-	// refs == -1 -> has been destroyed.
-
-	ctx := contexttest.Context(t)
-	for _, test := range []struct {
-		// desc is the test's description.
-		desc string
-
-		// root is the Dirent to create from.
-		root *Dirent
-
-		// expected references on walked Dirent.
-		refs int64
-	}{
-		{
-			desc: "Create caching",
-			root: NewDirent(ctx, NewEmptyDir(ctx, NewDirentCache(1)), "root"),
-			refs: 2,
-		},
-		{
-			desc: "Create not caching",
-			root: NewDirent(ctx, NewEmptyDir(ctx, nil), "root"),
-			refs: 1,
-		},
-	} {
-		t.Run(test.desc, func(t *testing.T) {
-			name := "d"
-			f, err := test.root.Create(ctx, test.root, name, FileFlags{}, FilePermissions{})
-			if err != nil {
-				t.Fatalf("root.Create(root, %q) failed: %v", name, err)
-			}
-			d := f.Dirent
-
-			if got := d.ReadRefs(); got != test.refs {
-				t.Errorf("dirent has a ref count of %d, want %d", got, test.refs)
-			}
-		})
-	}
-}
-
-func TestRemoveExtraRefs(t *testing.T) {
-	// refs == 0 -> one reference.
-	// refs == -1 -> has been destroyed.
-
-	ctx := contexttest.Context(t)
-	for _, test := range []struct {
-		// desc is the test's description.
-		desc string
-
-		// root is the Dirent to make and remove from.
-		root *Dirent
-	}{
-		{
-			desc: "Remove caching",
-			root: NewDirent(ctx, NewEmptyDir(ctx, NewDirentCache(1)), "root"),
-		},
-		{
-			desc: "Remove not caching",
-			root: NewDirent(ctx, NewEmptyDir(ctx, nil), "root"),
-		},
-	} {
-		t.Run(test.desc, func(t *testing.T) {
-			name := "d"
-			f, err := test.root.Create(ctx, test.root, name, FileFlags{}, FilePermissions{})
-			if err != nil {
-				t.Fatalf("root.Create(%q, _) failed: %v", name, err)
-			}
-			d := f.Dirent
-
-			if err := test.root.Remove(contexttest.Context(t), test.root, name); err != nil {
-				t.Fatalf("root.Remove(root, %q) failed: %v", name, err)
-			}
-
-			if got := d.ReadRefs(); got != 1 {
-				t.Fatalf("dirent has a ref count of %d, want %d", got, 1)
-			}
-
-			d.DecRef()
-
-			test.root.flush()
-
-			if got := len(test.root.children); got != 0 {
-				t.Errorf("root has %d children, want %d", got, 0)
-			}
-		})
-	}
-}
-
-func TestRenameExtraRefs(t *testing.T) {
-	// refs == 0 -> one reference.
-	// refs == -1 -> has been destroyed.
-
-	for _, test := range []struct {
-		// desc is the test's description.
-		desc string
-
-		// cache of extra Dirent references, may be nil.
-		cache *DirentCache
-	}{
-		{
-			desc:  "Rename no caching",
-			cache: nil,
-		},
-		{
-			desc:  "Rename caching",
-			cache: NewDirentCache(5),
-		},
-	} {
-		t.Run(test.desc, func(t *testing.T) {
-			ctx := contexttest.Context(t)
-
-			dirAttr := StableAttr{Type: Directory}
-
-			oldParent := NewDirent(ctx, NewMockInode(ctx, NewMockMountSource(test.cache), dirAttr), "old_parent")
-			newParent := NewDirent(ctx, NewMockInode(ctx, NewMockMountSource(test.cache), dirAttr), "new_parent")
-
-			renamed, err := oldParent.Walk(ctx, oldParent, "old_child")
-			if err != nil {
-				t.Fatalf("Walk(oldParent, %q) got error %v, want nil", "old_child", err)
-			}
-			replaced, err := newParent.Walk(ctx, oldParent, "new_child")
-			if err != nil {
-				t.Fatalf("Walk(newParent, %q) got error %v, want nil", "new_child", err)
-			}
-
-			if err := Rename(contexttest.RootContext(t), oldParent /*root */, oldParent, "old_child", newParent, "new_child"); err != nil {
-				t.Fatalf("Rename got error %v, want nil", err)
-			}
-
-			oldParent.flush()
-			newParent.flush()
-
-			// Expect to have only active references.
-			if got := renamed.ReadRefs(); got != 1 {
-				t.Errorf("renamed has ref count %d, want only active references %d", got, 1)
-			}
-			if got := replaced.ReadRefs(); got != 1 {
-				t.Errorf("replaced has ref count %d, want only active references %d", got, 1)
-			}
-		})
-	}
-}