restic/internal/archiver/archiver_test.go

369 lines
8.8 KiB
Go

package archiver_test
import (
"bytes"
"context"
"io"
"io/ioutil"
"os"
"path/filepath"
"testing"
"time"
"github.com/restic/restic/internal/archiver"
"github.com/restic/restic/internal/checker"
"github.com/restic/restic/internal/crypto"
"github.com/restic/restic/internal/repository"
"github.com/restic/restic/internal/restic"
. "github.com/restic/restic/internal/test"
"github.com/restic/restic/internal/errors"
"github.com/restic/chunker"
)
var testPol = chunker.Pol(0x3DA3358B4DC173)
type Rdr interface {
io.ReadSeeker
io.ReaderAt
}
func benchmarkChunkEncrypt(b testing.TB, buf, buf2 []byte, rd Rdr, key *crypto.Key) {
rd.Seek(0, 0)
ch := chunker.New(rd, testPol)
for {
chunk, err := ch.Next(buf)
if errors.Cause(err) == io.EOF {
break
}
OK(b, err)
// reduce length of buf
Assert(b, uint(len(chunk.Data)) == chunk.Length,
"invalid length: got %d, expected %d", len(chunk.Data), chunk.Length)
_, err = key.Encrypt(buf2, chunk.Data)
OK(b, err)
}
}
func BenchmarkChunkEncrypt(b *testing.B) {
repo, cleanup := repository.TestRepository(b)
defer cleanup()
data := Random(23, 10<<20) // 10MiB
rd := bytes.NewReader(data)
buf := make([]byte, chunker.MaxSize)
buf2 := make([]byte, chunker.MaxSize)
b.ResetTimer()
b.SetBytes(int64(len(data)))
for i := 0; i < b.N; i++ {
benchmarkChunkEncrypt(b, buf, buf2, rd, repo.Key())
}
}
func benchmarkChunkEncryptP(b *testing.PB, buf []byte, rd Rdr, key *crypto.Key) {
ch := chunker.New(rd, testPol)
for {
chunk, err := ch.Next(buf)
if errors.Cause(err) == io.EOF {
break
}
// reduce length of chunkBuf
key.Encrypt(chunk.Data, chunk.Data)
}
}
func BenchmarkChunkEncryptParallel(b *testing.B) {
repo, cleanup := repository.TestRepository(b)
defer cleanup()
data := Random(23, 10<<20) // 10MiB
buf := make([]byte, chunker.MaxSize)
b.ResetTimer()
b.SetBytes(int64(len(data)))
b.RunParallel(func(pb *testing.PB) {
for pb.Next() {
rd := bytes.NewReader(data)
benchmarkChunkEncryptP(pb, buf, rd, repo.Key())
}
})
}
func archiveDirectory(b testing.TB) {
repo, cleanup := repository.TestRepository(b)
defer cleanup()
arch := archiver.New(repo)
_, id, err := arch.Snapshot(context.TODO(), nil, []string{BenchArchiveDirectory}, nil, "localhost", nil)
OK(b, err)
b.Logf("snapshot archived as %v", id)
}
func TestArchiveDirectory(t *testing.T) {
if BenchArchiveDirectory == "" {
t.Skip("benchdir not set, skipping TestArchiveDirectory")
}
archiveDirectory(t)
}
func BenchmarkArchiveDirectory(b *testing.B) {
if BenchArchiveDirectory == "" {
b.Skip("benchdir not set, skipping BenchmarkArchiveDirectory")
}
for i := 0; i < b.N; i++ {
archiveDirectory(b)
}
}
func countPacks(repo restic.Repository, t restic.FileType) (n uint) {
for range repo.Backend().List(context.TODO(), t) {
n++
}
return n
}
func archiveWithDedup(t testing.TB) {
repo, cleanup := repository.TestRepository(t)
defer cleanup()
if BenchArchiveDirectory == "" {
t.Skip("benchdir not set, skipping TestArchiverDedup")
}
var cnt struct {
before, after, after2 struct {
packs, dataBlobs, treeBlobs uint
}
}
// archive a few files
sn := archiver.TestSnapshot(t, repo, BenchArchiveDirectory, nil)
t.Logf("archived snapshot %v", sn.ID().Str())
// get archive stats
cnt.before.packs = countPacks(repo, restic.DataFile)
cnt.before.dataBlobs = repo.Index().Count(restic.DataBlob)
cnt.before.treeBlobs = repo.Index().Count(restic.TreeBlob)
t.Logf("packs %v, data blobs %v, tree blobs %v",
cnt.before.packs, cnt.before.dataBlobs, cnt.before.treeBlobs)
// archive the same files again, without parent snapshot
sn2 := archiver.TestSnapshot(t, repo, BenchArchiveDirectory, nil)
t.Logf("archived snapshot %v", sn2.ID().Str())
// get archive stats again
cnt.after.packs = countPacks(repo, restic.DataFile)
cnt.after.dataBlobs = repo.Index().Count(restic.DataBlob)
cnt.after.treeBlobs = repo.Index().Count(restic.TreeBlob)
t.Logf("packs %v, data blobs %v, tree blobs %v",
cnt.after.packs, cnt.after.dataBlobs, cnt.after.treeBlobs)
// if there are more data blobs, something is wrong
if cnt.after.dataBlobs > cnt.before.dataBlobs {
t.Fatalf("TestArchiverDedup: too many data blobs in repository: before %d, after %d",
cnt.before.dataBlobs, cnt.after.dataBlobs)
}
// archive the same files again, with a parent snapshot
sn3 := archiver.TestSnapshot(t, repo, BenchArchiveDirectory, sn2.ID())
t.Logf("archived snapshot %v, parent %v", sn3.ID().Str(), sn2.ID().Str())
// get archive stats again
cnt.after2.packs = countPacks(repo, restic.DataFile)
cnt.after2.dataBlobs = repo.Index().Count(restic.DataBlob)
cnt.after2.treeBlobs = repo.Index().Count(restic.TreeBlob)
t.Logf("packs %v, data blobs %v, tree blobs %v",
cnt.after2.packs, cnt.after2.dataBlobs, cnt.after2.treeBlobs)
// if there are more data blobs, something is wrong
if cnt.after2.dataBlobs > cnt.before.dataBlobs {
t.Fatalf("TestArchiverDedup: too many data blobs in repository: before %d, after %d",
cnt.before.dataBlobs, cnt.after2.dataBlobs)
}
}
func TestArchiveDedup(t *testing.T) {
archiveWithDedup(t)
}
// Saves several identical chunks concurrently and later checks that there are no
// unreferenced packs in the repository. See also #292 and #358.
func TestParallelSaveWithDuplication(t *testing.T) {
for seed := 0; seed < 10; seed++ {
testParallelSaveWithDuplication(t, seed)
}
}
func testParallelSaveWithDuplication(t *testing.T, seed int) {
repo, cleanup := repository.TestRepository(t)
defer cleanup()
dataSizeMb := 128
duplication := 7
arch := archiver.New(repo)
chunks := getRandomData(seed, dataSizeMb*1024*1024)
errChannels := [](<-chan error){}
// interwoven processing of subsequent chunks
maxParallel := 2*duplication - 1
barrier := make(chan struct{}, maxParallel)
for _, c := range chunks {
for dupIdx := 0; dupIdx < duplication; dupIdx++ {
errChan := make(chan error)
errChannels = append(errChannels, errChan)
go func(c chunker.Chunk, errChan chan<- error) {
barrier <- struct{}{}
id := restic.Hash(c.Data)
time.Sleep(time.Duration(id[0]))
err := arch.Save(context.TODO(), restic.DataBlob, c.Data, id)
<-barrier
errChan <- err
}(c, errChan)
}
}
for _, errChan := range errChannels {
OK(t, <-errChan)
}
OK(t, repo.Flush())
OK(t, repo.SaveIndex(context.TODO()))
chkr := createAndInitChecker(t, repo)
assertNoUnreferencedPacks(t, chkr)
}
func getRandomData(seed int, size int) []chunker.Chunk {
buf := Random(seed, size)
var chunks []chunker.Chunk
chunker := chunker.New(bytes.NewReader(buf), testPol)
for {
c, err := chunker.Next(nil)
if errors.Cause(err) == io.EOF {
break
}
chunks = append(chunks, c)
}
return chunks
}
func createAndInitChecker(t *testing.T, repo restic.Repository) *checker.Checker {
chkr := checker.New(repo)
hints, errs := chkr.LoadIndex(context.TODO())
if len(errs) > 0 {
t.Fatalf("expected no errors, got %v: %v", len(errs), errs)
}
if len(hints) > 0 {
t.Errorf("expected no hints, got %v: %v", len(hints), hints)
}
return chkr
}
func assertNoUnreferencedPacks(t *testing.T, chkr *checker.Checker) {
errChan := make(chan error)
go chkr.Packs(context.TODO(), errChan)
for err := range errChan {
OK(t, err)
}
}
func TestArchiveEmptySnapshot(t *testing.T) {
repo, cleanup := repository.TestRepository(t)
defer cleanup()
arch := archiver.New(repo)
sn, id, err := arch.Snapshot(context.TODO(), nil, []string{"file-does-not-exist-123123213123", "file2-does-not-exist-too-123123123"}, nil, "localhost", nil)
if err == nil {
t.Errorf("expected error for empty snapshot, got nil")
}
if !id.IsNull() {
t.Errorf("expected null ID for empty snapshot, got %v", id.Str())
}
if sn != nil {
t.Errorf("expected null snapshot for empty snapshot, got %v", sn)
}
}
func chdir(t testing.TB, target string) (cleanup func()) {
curdir, err := os.Getwd()
if err != nil {
t.Fatal(err)
}
t.Logf("chdir to %v", target)
err = os.Chdir(target)
if err != nil {
t.Fatal(err)
}
return func() {
t.Logf("chdir back to %v", curdir)
err := os.Chdir(curdir)
if err != nil {
t.Fatal(err)
}
}
}
func TestArchiveNameCollision(t *testing.T) {
repo, cleanup := repository.TestRepository(t)
defer cleanup()
dir, cleanup := TempDir(t)
defer cleanup()
root := filepath.Join(dir, "root")
OK(t, os.MkdirAll(root, 0755))
OK(t, ioutil.WriteFile(filepath.Join(dir, "testfile"), []byte("testfile1"), 0644))
OK(t, ioutil.WriteFile(filepath.Join(dir, "root", "testfile"), []byte("testfile2"), 0644))
defer chdir(t, root)()
arch := archiver.New(repo)
sn, id, err := arch.Snapshot(context.TODO(), nil, []string{"testfile", filepath.Join("..", "testfile")}, nil, "localhost", nil)
OK(t, err)
t.Logf("snapshot archived as %v", id)
tree, err := repo.LoadTree(context.TODO(), *sn.Tree)
OK(t, err)
if len(tree.Nodes) != 2 {
t.Fatalf("tree has %d nodes, wanted 2: %v", len(tree.Nodes), tree.Nodes)
}
}