138 lines
3.4 KiB
Go
138 lines
3.4 KiB
Go
// Copyright 2018 Google Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package fs_test
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import (
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"reflect"
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"testing"
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"gvisor.googlesource.com/gvisor/pkg/sentry/context"
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"gvisor.googlesource.com/gvisor/pkg/sentry/context/contexttest"
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"gvisor.googlesource.com/gvisor/pkg/sentry/fs"
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)
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func TestReaddir(t *testing.T) {
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ctx := contexttest.Context(t)
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ctx = &rootContext{
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Context: ctx,
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root: fs.NewDirent(newTestRamfsDir(ctx, nil, nil), "root"),
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}
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for _, test := range []struct {
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// Test description.
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desc string
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// Lookup parameters.
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dir *fs.Inode
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// Want from lookup.
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err error
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names []string
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}{
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{
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desc: "no upper, lower has entries",
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dir: fs.NewTestOverlayDir(ctx,
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nil, /* upper */
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newTestRamfsDir(ctx, []dirContent{
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{name: "a"},
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{name: "b"},
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}, nil), /* lower */
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),
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names: []string{".", "..", "a", "b"},
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},
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{
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desc: "upper has entries, no lower",
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dir: fs.NewTestOverlayDir(ctx,
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newTestRamfsDir(ctx, []dirContent{
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{name: "a"},
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{name: "b"},
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}, nil), /* upper */
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nil, /* lower */
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),
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names: []string{".", "..", "a", "b"},
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},
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{
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desc: "upper and lower, entries combine",
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dir: fs.NewTestOverlayDir(ctx,
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newTestRamfsDir(ctx, []dirContent{
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{name: "a"},
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}, nil), /* lower */
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newTestRamfsDir(ctx, []dirContent{
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{name: "b"},
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}, nil), /* lower */
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),
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names: []string{".", "..", "a", "b"},
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},
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{
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desc: "upper and lower, entries combine, none are masked",
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dir: fs.NewTestOverlayDir(ctx,
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newTestRamfsDir(ctx, []dirContent{
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{name: "a"},
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}, []string{"b"}), /* lower */
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newTestRamfsDir(ctx, []dirContent{
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{name: "c"},
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}, nil), /* lower */
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),
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names: []string{".", "..", "a", "c"},
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},
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{
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desc: "upper and lower, entries combine, upper masks some of lower",
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dir: fs.NewTestOverlayDir(ctx,
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newTestRamfsDir(ctx, []dirContent{
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{name: "a"},
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}, []string{"b"}), /* lower */
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newTestRamfsDir(ctx, []dirContent{
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{name: "b"}, /* will be masked */
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{name: "c"},
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}, nil), /* lower */
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),
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names: []string{".", "..", "a", "c"},
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},
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} {
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t.Run(test.desc, func(t *testing.T) {
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openDir, err := test.dir.GetFile(ctx, fs.NewDirent(test.dir, "stub"), fs.FileFlags{Read: true})
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if err != nil {
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t.Fatalf("GetFile got error %v, want nil", err)
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}
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stubSerializer := &fs.CollectEntriesSerializer{}
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err = openDir.Readdir(ctx, stubSerializer)
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if err != test.err {
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t.Fatalf("Readdir got error %v, want nil", err)
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}
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if err != nil {
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return
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}
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if !reflect.DeepEqual(stubSerializer.Order, test.names) {
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t.Errorf("Readdir got names %v, want %v", stubSerializer.Order, test.names)
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}
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})
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}
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}
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type rootContext struct {
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context.Context
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root *fs.Dirent
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}
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// Value implements context.Context.
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func (r *rootContext) Value(key interface{}) interface{} {
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switch key {
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case fs.CtxRoot:
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r.root.IncRef()
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return r.root
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default:
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return r.Context.Value(key)
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}
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}
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