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885431ec2b
Some tests have to explicitly create pack files with blobs that don't match their ID. For those blobs the builtin verification of the repository must be disabled.
418 lines
10 KiB
Go
418 lines
10 KiB
Go
package repository_test
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import (
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"context"
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"math/rand"
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"testing"
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"time"
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"github.com/restic/restic/internal/index"
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"github.com/restic/restic/internal/repository"
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"github.com/restic/restic/internal/restic"
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rtest "github.com/restic/restic/internal/test"
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"golang.org/x/sync/errgroup"
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)
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func randomSize(min, max int) int {
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return rand.Intn(max-min) + min
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}
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func createRandomBlobs(t testing.TB, repo restic.Repository, blobs int, pData float32) {
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var wg errgroup.Group
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repo.StartPackUploader(context.TODO(), &wg)
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for i := 0; i < blobs; i++ {
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var (
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tpe restic.BlobType
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length int
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)
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if rand.Float32() < pData {
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tpe = restic.DataBlob
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length = randomSize(10*1024, 1024*1024) // 10KiB to 1MiB of data
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} else {
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tpe = restic.TreeBlob
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length = randomSize(1*1024, 20*1024) // 1KiB to 20KiB
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}
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buf := make([]byte, length)
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rand.Read(buf)
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id, exists, _, err := repo.SaveBlob(context.TODO(), tpe, buf, restic.ID{}, false)
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if err != nil {
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t.Fatalf("SaveFrom() error %v", err)
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}
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if exists {
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t.Errorf("duplicate blob %v/%v ignored", id, restic.DataBlob)
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continue
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}
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if rand.Float32() < 0.2 {
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if err = repo.Flush(context.Background()); err != nil {
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t.Fatalf("repo.Flush() returned error %v", err)
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}
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repo.StartPackUploader(context.TODO(), &wg)
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}
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}
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if err := repo.Flush(context.Background()); err != nil {
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t.Fatalf("repo.Flush() returned error %v", err)
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}
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}
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func createRandomWrongBlob(t testing.TB, repo restic.Repository) {
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length := randomSize(10*1024, 1024*1024) // 10KiB to 1MiB of data
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buf := make([]byte, length)
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rand.Read(buf)
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id := restic.Hash(buf)
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// invert first data byte
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buf[0] ^= 0xff
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var wg errgroup.Group
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repo.StartPackUploader(context.TODO(), &wg)
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_, _, _, err := repo.SaveBlob(context.TODO(), restic.DataBlob, buf, id, false)
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if err != nil {
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t.Fatalf("SaveFrom() error %v", err)
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}
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if err := repo.Flush(context.Background()); err != nil {
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t.Fatalf("repo.Flush() returned error %v", err)
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}
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}
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// selectBlobs splits the list of all blobs randomly into two lists. A blob
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// will be contained in the firstone ith probability p.
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func selectBlobs(t *testing.T, repo restic.Repository, p float32) (list1, list2 restic.BlobSet) {
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list1 = restic.NewBlobSet()
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list2 = restic.NewBlobSet()
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blobs := restic.NewBlobSet()
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err := repo.List(context.TODO(), restic.PackFile, func(id restic.ID, size int64) error {
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entries, _, err := repo.ListPack(context.TODO(), id, size)
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if err != nil {
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t.Fatalf("error listing pack %v: %v", id, err)
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}
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for _, entry := range entries {
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h := restic.BlobHandle{ID: entry.ID, Type: entry.Type}
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if blobs.Has(h) {
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t.Errorf("ignoring duplicate blob %v", h)
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return nil
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}
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blobs.Insert(h)
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if rand.Float32() <= p {
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list1.Insert(restic.BlobHandle{ID: entry.ID, Type: entry.Type})
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} else {
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list2.Insert(restic.BlobHandle{ID: entry.ID, Type: entry.Type})
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}
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}
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return nil
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})
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if err != nil {
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t.Fatal(err)
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}
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return list1, list2
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}
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func listPacks(t *testing.T, repo restic.Repository) restic.IDSet {
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list := restic.NewIDSet()
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err := repo.List(context.TODO(), restic.PackFile, func(id restic.ID, size int64) error {
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list.Insert(id)
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return nil
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})
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if err != nil {
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t.Fatal(err)
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}
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return list
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}
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func findPacksForBlobs(t *testing.T, repo restic.Repository, blobs restic.BlobSet) restic.IDSet {
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packs := restic.NewIDSet()
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idx := repo.Index()
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for h := range blobs {
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list := idx.Lookup(h)
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if len(list) == 0 {
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t.Fatal("Failed to find blob", h.ID.Str(), "with type", h.Type)
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}
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for _, pb := range list {
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packs.Insert(pb.PackID)
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}
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}
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return packs
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}
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func repack(t *testing.T, repo restic.Repository, packs restic.IDSet, blobs restic.BlobSet) {
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repackedBlobs, err := repository.Repack(context.TODO(), repo, repo, packs, blobs, nil)
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if err != nil {
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t.Fatal(err)
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}
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for id := range repackedBlobs {
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err = repo.Backend().Remove(context.TODO(), restic.Handle{Type: restic.PackFile, Name: id.String()})
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if err != nil {
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t.Fatal(err)
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}
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}
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}
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func flush(t *testing.T, repo restic.Repository) {
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if err := repo.Flush(context.TODO()); err != nil {
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t.Fatalf("repo.SaveIndex() %v", err)
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}
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}
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func rebuildIndex(t *testing.T, repo restic.Repository) {
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err := repo.SetIndex(index.NewMasterIndex())
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if err != nil {
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t.Fatal(err)
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}
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packs := make(map[restic.ID]int64)
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err = repo.List(context.TODO(), restic.PackFile, func(id restic.ID, size int64) error {
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packs[id] = size
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return nil
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})
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if err != nil {
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t.Fatal(err)
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}
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_, err = repo.(*repository.Repository).CreateIndexFromPacks(context.TODO(), packs, nil)
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if err != nil {
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t.Fatal(err)
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}
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err = repo.List(context.TODO(), restic.IndexFile, func(id restic.ID, size int64) error {
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h := restic.Handle{
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Type: restic.IndexFile,
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Name: id.String(),
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}
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return repo.Backend().Remove(context.TODO(), h)
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})
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if err != nil {
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t.Fatal(err)
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}
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_, err = repo.Index().Save(context.TODO(), repo, restic.NewIDSet(), nil, nil)
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if err != nil {
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t.Fatal(err)
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}
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}
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func reloadIndex(t *testing.T, repo restic.Repository) {
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err := repo.SetIndex(index.NewMasterIndex())
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if err != nil {
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t.Fatal(err)
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}
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if err := repo.LoadIndex(context.TODO(), nil); err != nil {
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t.Fatalf("error loading new index: %v", err)
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}
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}
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func TestRepack(t *testing.T) {
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repository.TestAllVersions(t, testRepack)
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}
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func testRepack(t *testing.T, version uint) {
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repo := repository.TestRepositoryWithVersion(t, version)
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seed := time.Now().UnixNano()
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rand.Seed(seed)
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t.Logf("rand seed is %v", seed)
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createRandomBlobs(t, repo, 100, 0.7)
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packsBefore := listPacks(t, repo)
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// Running repack on empty ID sets should not do anything at all.
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repack(t, repo, nil, nil)
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packsAfter := listPacks(t, repo)
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if !packsAfter.Equals(packsBefore) {
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t.Fatalf("packs are not equal, Repack modified something. Before:\n %v\nAfter:\n %v",
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packsBefore, packsAfter)
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}
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flush(t, repo)
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removeBlobs, keepBlobs := selectBlobs(t, repo, 0.2)
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removePacks := findPacksForBlobs(t, repo, removeBlobs)
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repack(t, repo, removePacks, keepBlobs)
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rebuildIndex(t, repo)
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reloadIndex(t, repo)
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packsAfter = listPacks(t, repo)
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for id := range removePacks {
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if packsAfter.Has(id) {
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t.Errorf("pack %v still present although it should have been repacked and removed", id.Str())
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}
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}
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idx := repo.Index()
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for h := range keepBlobs {
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list := idx.Lookup(h)
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if len(list) == 0 {
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t.Errorf("unable to find blob %v in repo", h.ID.Str())
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continue
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}
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if len(list) != 1 {
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t.Errorf("expected one pack in the list, got: %v", list)
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continue
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}
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pb := list[0]
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if removePacks.Has(pb.PackID) {
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t.Errorf("lookup returned pack ID %v that should've been removed", pb.PackID)
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}
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}
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for h := range removeBlobs {
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if _, found := repo.LookupBlobSize(h.ID, h.Type); found {
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t.Errorf("blob %v still contained in the repo", h)
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}
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}
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}
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func TestRepackCopy(t *testing.T) {
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repository.TestAllVersions(t, testRepackCopy)
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}
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type oneConnectionRepo struct {
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restic.Repository
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}
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func (r oneConnectionRepo) Connections() uint {
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return 1
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}
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func testRepackCopy(t *testing.T, version uint) {
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repo := repository.TestRepositoryWithVersion(t, version)
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dstRepo := repository.TestRepositoryWithVersion(t, version)
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// test with minimal possible connection count
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repoWrapped := &oneConnectionRepo{repo}
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dstRepoWrapped := &oneConnectionRepo{dstRepo}
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seed := time.Now().UnixNano()
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rand.Seed(seed)
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t.Logf("rand seed is %v", seed)
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createRandomBlobs(t, repo, 100, 0.7)
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flush(t, repo)
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_, keepBlobs := selectBlobs(t, repo, 0.2)
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copyPacks := findPacksForBlobs(t, repo, keepBlobs)
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_, err := repository.Repack(context.TODO(), repoWrapped, dstRepoWrapped, copyPacks, keepBlobs, nil)
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if err != nil {
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t.Fatal(err)
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}
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rebuildIndex(t, dstRepo)
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reloadIndex(t, dstRepo)
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idx := dstRepo.Index()
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for h := range keepBlobs {
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list := idx.Lookup(h)
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if len(list) == 0 {
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t.Errorf("unable to find blob %v in repo", h.ID.Str())
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continue
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}
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if len(list) != 1 {
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t.Errorf("expected one pack in the list, got: %v", list)
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continue
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}
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}
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}
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func TestRepackWrongBlob(t *testing.T) {
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repository.TestAllVersions(t, testRepackWrongBlob)
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}
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func testRepackWrongBlob(t *testing.T, version uint) {
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// disable verification to allow adding corrupted blobs to the repository
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repo := repository.TestRepositoryWithBackend(t, nil, version, repository.Options{NoVerifyPack: true})
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seed := time.Now().UnixNano()
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rand.Seed(seed)
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t.Logf("rand seed is %v", seed)
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createRandomBlobs(t, repo, 5, 0.7)
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createRandomWrongBlob(t, repo)
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// just keep all blobs, but also rewrite every pack
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_, keepBlobs := selectBlobs(t, repo, 0)
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rewritePacks := findPacksForBlobs(t, repo, keepBlobs)
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_, err := repository.Repack(context.TODO(), repo, repo, rewritePacks, keepBlobs, nil)
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if err == nil {
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t.Fatal("expected repack to fail but got no error")
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}
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t.Logf("found expected error: %v", err)
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}
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func TestRepackBlobFallback(t *testing.T) {
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repository.TestAllVersions(t, testRepackBlobFallback)
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}
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func testRepackBlobFallback(t *testing.T, version uint) {
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// disable verification to allow adding corrupted blobs to the repository
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repo := repository.TestRepositoryWithBackend(t, nil, version, repository.Options{NoVerifyPack: true})
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seed := time.Now().UnixNano()
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rand.Seed(seed)
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t.Logf("rand seed is %v", seed)
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length := randomSize(10*1024, 1024*1024) // 10KiB to 1MiB of data
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buf := make([]byte, length)
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rand.Read(buf)
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id := restic.Hash(buf)
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// corrupted copy
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modbuf := make([]byte, len(buf))
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copy(modbuf, buf)
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// invert first data byte
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modbuf[0] ^= 0xff
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// create pack with broken copy
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var wg errgroup.Group
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repo.StartPackUploader(context.TODO(), &wg)
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_, _, _, err := repo.SaveBlob(context.TODO(), restic.DataBlob, modbuf, id, false)
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rtest.OK(t, err)
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rtest.OK(t, repo.Flush(context.Background()))
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// find pack with damaged blob
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keepBlobs := restic.NewBlobSet(restic.BlobHandle{Type: restic.DataBlob, ID: id})
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rewritePacks := findPacksForBlobs(t, repo, keepBlobs)
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// create pack with valid copy
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repo.StartPackUploader(context.TODO(), &wg)
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_, _, _, err = repo.SaveBlob(context.TODO(), restic.DataBlob, buf, id, true)
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rtest.OK(t, err)
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rtest.OK(t, repo.Flush(context.Background()))
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// repack must fallback to valid copy
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_, err = repository.Repack(context.TODO(), repo, repo, rewritePacks, keepBlobs, nil)
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rtest.OK(t, err)
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keepBlobs = restic.NewBlobSet(restic.BlobHandle{Type: restic.DataBlob, ID: id})
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packs := findPacksForBlobs(t, repo, keepBlobs)
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rtest.Assert(t, len(packs) == 3, "unexpected number of copies: %v", len(packs))
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}
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