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/*
Copyright The containerd 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 recorder
import (
"compress/gzip"
"context"
"encoding/json"
"fmt"
"io"
"os"
"path"
"testing"
"github.com/containerd/containerd/content"
"github.com/containerd/containerd/content/local"
"github.com/containerd/containerd/errdefs"
"github.com/containerd/stargz-snapshotter/recorder"
"github.com/containerd/stargz-snapshotter/util/testutil"
ocispec "github.com/opencontainers/image-spec/specs-go/v1"
"github.com/rs/xid"
)
var allowedPrefix = [4]string{"", "./", "/", "../"}
func TestNodeIndex(t *testing.T) {
type recordEntry struct {
name string
index int
}
tests := []struct {
name string
in [][]testutil.TarEntry
record []string
want []recordEntry
wantFail bool
}{
{
name: "single layer",
in: [][]testutil.TarEntry{
{
testutil.File("foo", "foo"),
testutil.File("bar", "bar"),
},
},
record: []string{"bar", "foo"},
want: []recordEntry{
{"bar", 0},
{"foo", 0},
},
},
{
name: "overlay",
in: [][]testutil.TarEntry{
{
testutil.File("foo", "foo"),
testutil.Dir("bar/"),
testutil.Dir("bar/barbar/"),
testutil.File("bar/barbar/bar2", "bar2"),
testutil.File("bar/barbar/foo2", "foo2"),
testutil.File("x", "x"),
testutil.File("y", "y"),
},
{
testutil.File("foo", "foo2"),
testutil.File("baz", "baz"),
testutil.Dir("bar/"),
testutil.Dir("bar/barbar/"),
testutil.File("bar/barbar/foo2", "foo2-upper"),
},
{
testutil.File("foo", "foo3"),
testutil.Dir("a/"),
testutil.File("a/aaaaaa", "a"),
testutil.File("y", "y"),
},
},
record: []string{
"baz",
"foo",
"bar/barbar/foo2",
"a/aaaaaa",
"bar/barbar/bar2",
"y"},
want: []recordEntry{
{"baz", 1},
{"foo", 2},
{"bar/barbar/foo2", 1},
{"a/aaaaaa", 2},
{"bar/barbar/bar2", 0},
{"y", 2},
},
},
{
name: "various files",
in: [][]testutil.TarEntry{
// All file path should be interpreted as the path relative to root.
{
testutil.File("foo", "foo"),
testutil.Dir("bar/"),
testutil.Symlink("bar/foosym", "foo"),
testutil.Dir("bar/barbar/"),
testutil.File("./bar/barbar/bar2", "bar2"),
testutil.File("../bar/barbar/foo2", "foo2"),
testutil.File("/x", "x"),
testutil.Chardev("chardev", 1, 10),
testutil.Fifo("bar/fifo1"),
},
{
testutil.File("./foo", "foo2"),
testutil.File("baz", "baz"),
testutil.Dir("bar/"),
testutil.Dir("./bar/barbar/"),
testutil.File("bar/barbar/bazlink", "baz"),
testutil.File("../bar/barbar/foo2", "foo2-upper"),
testutil.Chardev("chardev", 10, 100),
testutil.Chardev("./blockdev", 100, 1),
},
},
record: []string{
// All file path should be interpreted as the path relative to root.
"./bar/foosym",
"bar/barbar/bazlink",
"/bar/barbar/foo2",
"chardev",
"../blockdev",
"bar/fifo1",
"./bar/barbar/bar2",
},
want: []recordEntry{
{"bar/foosym", 0},
{"bar/barbar/bazlink", 1},
{"bar/barbar/foo2", 1},
{"chardev", 1},
{"blockdev", 1},
{"bar/fifo1", 0},
{"bar/barbar/bar2", 0},
},
},
{
name: "whiteout file",
in: [][]testutil.TarEntry{
{
testutil.Dir("bar/"),
testutil.File("bar/barfile", "bar"),
},
{
testutil.Dir("bar/"),
testutil.File(path.Join("bar", whiteoutPrefix+"barfile"), "bar"),
},
},
record: []string{"bar/barfile"},
want: []recordEntry{},
wantFail: true,
},
{
name: "whiteout dir",
in: [][]testutil.TarEntry{
{
testutil.Dir("bar/"),
testutil.File("bar/barfile", "bar"),
},
{
testutil.Dir("bar/"),
testutil.Dir(path.Join("bar", whiteoutOpaqueDir) + "/"),
},
},
record: []string{"bar/barfile"},
want: []recordEntry{},
wantFail: true,
},
{
name: "whiteout dir",
in: [][]testutil.TarEntry{
{
testutil.Dir("bar/"),
testutil.File("bar/barfile", "bar"),
},
{
testutil.Dir("bar/"),
testutil.Dir(path.Join("bar", whiteoutOpaqueDir) + "/"),
},
},
record: []string{"bar/barfile"},
want: []recordEntry{},
wantFail: true,
},
}
tempDir, err := os.MkdirTemp("", "test-recorder")
if err != nil {
t.Fatalf("failed to prepare content store dir: %v", err)
}
defer os.RemoveAll(tempDir)
cs, err := local.NewStore(tempDir)
if err != nil {
t.Fatalf("failed to prepare content store: %v", err)
}
compressWrappers := map[string]func(r io.Reader) io.Reader{
ocispec.MediaTypeImageLayer: func(r io.Reader) io.Reader { return r }, // nop (uncompressed)
ocispec.MediaTypeImageLayerGzip: gzipCompress, // gzip compression
}
ctx := context.Background()
for _, tt := range tests {
for _, prefix := range allowedPrefix {
prefix := prefix
for mediatype, cWrapper := range compressWrappers {
t.Run(tt.name+":"+mediatype+",prefix="+prefix, func(t *testing.T) {
var layers []ocispec.Descriptor
for _, es := range tt.in {
ref := fmt.Sprintf("recorder-test-%v", xid.New().String())
lw, err := content.OpenWriter(ctx, cs, content.WithRef(ref))
if err != nil {
t.Errorf("failed to open writer: %v", err)
return
}
tarR := testutil.BuildTar(es, testutil.WithPrefix(prefix))
if _, err := io.Copy(lw, cWrapper(tarR)); err != nil {
t.Errorf("failed to copy layer: %v", err)
return
}
if err := lw.Commit(ctx, 0, ""); err != nil && !errdefs.IsAlreadyExists(err) {
t.Errorf("failed to commit layer: %v", err)
return
}
info, err := cs.Info(ctx, lw.Digest())
if err != nil {
t.Errorf("failed to get layer info: %v", err)
return
}
// TODO: check compressed version as well
layers = append(layers, ocispec.Descriptor{
Digest: info.Digest,
Size: info.Size,
MediaType: mediatype,
})
}
ir, err := imageRecorderFromManifest(ctx, cs,
ocispec.Descriptor{}, ocispec.Manifest{Layers: layers})
if err != nil {
t.Errorf("failed to get recorder: %v", err)
return
}
defer ir.Close()
fail := false
for _, name := range tt.record {
if err := ir.Record(name); err != nil {
fail = true
t.Logf("failed to record: %q: %v", name, err)
break
}
}
if tt.wantFail != fail {
t.Errorf("unexpected record result: fail = %v; wantFail = %v", fail, tt.wantFail)
return
}
if tt.wantFail {
return // no need to check the record out
}
recordOut, err := ir.Commit(ctx)
if err != nil {
t.Errorf("failed to commit record: %v", err)
return
}
ra, err := cs.ReaderAt(ctx, ocispec.Descriptor{Digest: recordOut})
if err != nil {
t.Errorf("failed to get record out: %v", err)
return
}
defer ra.Close()
dec := json.NewDecoder(io.NewSectionReader(ra, 0, ra.Size()))
i := 0
for dec.More() {
var e recorder.Entry
if err := dec.Decode(&e); err != nil {
t.Errorf("failed to decord record: %v", err)
return
}
if len(tt.want) <= i {
t.Errorf("too many records: %d th but want %d", i, len(tt.want))
return
}
if e.Path != tt.want[i].name || *e.LayerIndex != tt.want[i].index {
t.Errorf("unexpected entry { name = %q, index = %d }; want { name = %q, index = %d }", e.Path, *e.LayerIndex, tt.want[i].name, tt.want[i].index)
return
}
i++
}
if i < len(tt.want) {
t.Errorf("record is too short: %d; but want %d", i, len(tt.want))
return
}
})
}
}
}
}
func gzipCompress(r io.Reader) io.Reader {
pr, pw := io.Pipe()
go func() {
gw := gzip.NewWriter(pw)
if _, err := io.Copy(gw, r); err != nil {
gw.Close()
pw.CloseWithError(err)
return
}
gw.Close()
pw.Close()
}()
return pr
}
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