mirror of
https://github.com/restic/restic.git
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120ccc8754
Previously, SaveAndEncrypt would assemble blobs into packs and either return immediately if the pack is not yet full or upload the pack file otherwise. The upload will block the current goroutine until it finishes. Now, the upload is done using separate goroutines. This requires changes to the error handling. As uploads are no longer tied to a SaveAndEncrypt call, failed uploads are signaled using an errgroup. To count the uploaded amount of data, the pack header overhead is no longer returned by `packer.Finalize` but rather by `packer.HeaderOverhead`. This helper method is necessary to continue returning the pack header overhead directly to the responsible call to `repository.SaveBlob`. Without the method this would not be possible, as packs are finalized asynchronously.
701 lines
17 KiB
Go
701 lines
17 KiB
Go
package repository_test
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import (
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"bytes"
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"context"
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"crypto/sha256"
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"encoding/json"
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"fmt"
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"io"
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"math/rand"
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"os"
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"path/filepath"
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"strings"
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"testing"
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"time"
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"github.com/google/go-cmp/cmp"
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"github.com/klauspost/compress/zstd"
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"github.com/restic/restic/internal/archiver"
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"github.com/restic/restic/internal/crypto"
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"github.com/restic/restic/internal/repository"
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"github.com/restic/restic/internal/restic"
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"github.com/restic/restic/internal/test"
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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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var testSizes = []int{5, 23, 2<<18 + 23, 1 << 20}
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var rnd = rand.New(rand.NewSource(time.Now().UnixNano()))
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func TestSave(t *testing.T) {
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repository.TestAllVersions(t, testSave)
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}
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func testSave(t *testing.T, version uint) {
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repo, cleanup := repository.TestRepositoryWithVersion(t, version)
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defer cleanup()
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for _, size := range testSizes {
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data := make([]byte, size)
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_, err := io.ReadFull(rnd, data)
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rtest.OK(t, err)
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id := restic.Hash(data)
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var wg errgroup.Group
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repo.StartPackUploader(context.TODO(), &wg)
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// save
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sid, _, _, err := repo.SaveBlob(context.TODO(), restic.DataBlob, data, restic.ID{}, false)
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rtest.OK(t, err)
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rtest.Equals(t, id, sid)
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rtest.OK(t, repo.Flush(context.Background()))
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// rtest.OK(t, repo.SaveIndex())
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// read back
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buf, err := repo.LoadBlob(context.TODO(), restic.DataBlob, id, nil)
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rtest.OK(t, err)
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rtest.Equals(t, size, len(buf))
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rtest.Assert(t, len(buf) == len(data),
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"number of bytes read back does not match: expected %d, got %d",
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len(data), len(buf))
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rtest.Assert(t, bytes.Equal(buf, data),
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"data does not match: expected %02x, got %02x",
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data, buf)
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}
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}
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func TestSaveFrom(t *testing.T) {
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repository.TestAllVersions(t, testSaveFrom)
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}
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func testSaveFrom(t *testing.T, version uint) {
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repo, cleanup := repository.TestRepositoryWithVersion(t, version)
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defer cleanup()
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for _, size := range testSizes {
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data := make([]byte, size)
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_, err := io.ReadFull(rnd, data)
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rtest.OK(t, err)
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id := restic.Hash(data)
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var wg errgroup.Group
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repo.StartPackUploader(context.TODO(), &wg)
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// save
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id2, _, _, err := repo.SaveBlob(context.TODO(), restic.DataBlob, data, id, false)
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rtest.OK(t, err)
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rtest.Equals(t, id, id2)
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rtest.OK(t, repo.Flush(context.Background()))
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// read back
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buf, err := repo.LoadBlob(context.TODO(), restic.DataBlob, id, nil)
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rtest.OK(t, err)
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rtest.Equals(t, size, len(buf))
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rtest.Assert(t, len(buf) == len(data),
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"number of bytes read back does not match: expected %d, got %d",
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len(data), len(buf))
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rtest.Assert(t, bytes.Equal(buf, data),
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"data does not match: expected %02x, got %02x",
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data, buf)
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}
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}
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func BenchmarkSaveAndEncrypt(t *testing.B) {
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repository.BenchmarkAllVersions(t, benchmarkSaveAndEncrypt)
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}
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func benchmarkSaveAndEncrypt(t *testing.B, version uint) {
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repo, cleanup := repository.TestRepositoryWithVersion(t, version)
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defer cleanup()
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size := 4 << 20 // 4MiB
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data := make([]byte, size)
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_, err := io.ReadFull(rnd, data)
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rtest.OK(t, err)
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id := restic.ID(sha256.Sum256(data))
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t.ReportAllocs()
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t.ResetTimer()
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t.SetBytes(int64(size))
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for i := 0; i < t.N; i++ {
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_, _, _, err = repo.SaveBlob(context.TODO(), restic.DataBlob, data, id, true)
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rtest.OK(t, err)
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}
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}
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func TestLoadTree(t *testing.T) {
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repository.TestAllVersions(t, testLoadTree)
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}
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func testLoadTree(t *testing.T, version uint) {
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repo, cleanup := repository.TestRepositoryWithVersion(t, version)
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defer cleanup()
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if rtest.BenchArchiveDirectory == "" {
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t.Skip("benchdir not set, skipping")
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}
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// archive a few files
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sn := archiver.TestSnapshot(t, repo, rtest.BenchArchiveDirectory, nil)
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rtest.OK(t, repo.Flush(context.Background()))
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_, err := repo.LoadTree(context.TODO(), *sn.Tree)
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rtest.OK(t, err)
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}
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func BenchmarkLoadTree(t *testing.B) {
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repository.BenchmarkAllVersions(t, benchmarkLoadTree)
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}
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func benchmarkLoadTree(t *testing.B, version uint) {
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repo, cleanup := repository.TestRepositoryWithVersion(t, version)
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defer cleanup()
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if rtest.BenchArchiveDirectory == "" {
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t.Skip("benchdir not set, skipping")
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}
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// archive a few files
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sn := archiver.TestSnapshot(t, repo, rtest.BenchArchiveDirectory, nil)
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rtest.OK(t, repo.Flush(context.Background()))
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t.ResetTimer()
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for i := 0; i < t.N; i++ {
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_, err := repo.LoadTree(context.TODO(), *sn.Tree)
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rtest.OK(t, err)
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}
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}
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func TestLoadBlob(t *testing.T) {
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repository.TestAllVersions(t, testLoadBlob)
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}
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func testLoadBlob(t *testing.T, version uint) {
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repo, cleanup := repository.TestRepositoryWithVersion(t, version)
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defer cleanup()
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length := 1000000
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buf := restic.NewBlobBuffer(length)
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_, err := io.ReadFull(rnd, buf)
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rtest.OK(t, err)
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var wg errgroup.Group
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repo.StartPackUploader(context.TODO(), &wg)
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id, _, _, err := repo.SaveBlob(context.TODO(), restic.DataBlob, buf, restic.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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base := restic.CiphertextLength(length)
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for _, testlength := range []int{0, base - 20, base - 1, base, base + 7, base + 15, base + 1000} {
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buf = make([]byte, 0, testlength)
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buf, err := repo.LoadBlob(context.TODO(), restic.DataBlob, id, buf)
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if err != nil {
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t.Errorf("LoadBlob() returned an error for buffer size %v: %v", testlength, err)
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continue
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}
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if len(buf) != length {
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t.Errorf("LoadBlob() returned the wrong number of bytes: want %v, got %v", length, len(buf))
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continue
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}
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}
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}
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func BenchmarkLoadBlob(b *testing.B) {
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repository.BenchmarkAllVersions(b, benchmarkLoadBlob)
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}
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func benchmarkLoadBlob(b *testing.B, version uint) {
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repo, cleanup := repository.TestRepositoryWithVersion(b, version)
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defer cleanup()
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length := 1000000
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buf := restic.NewBlobBuffer(length)
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_, err := io.ReadFull(rnd, buf)
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rtest.OK(b, err)
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var wg errgroup.Group
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repo.StartPackUploader(context.TODO(), &wg)
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id, _, _, err := repo.SaveBlob(context.TODO(), restic.DataBlob, buf, restic.ID{}, false)
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rtest.OK(b, err)
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rtest.OK(b, repo.Flush(context.Background()))
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b.ResetTimer()
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b.SetBytes(int64(length))
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for i := 0; i < b.N; i++ {
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var err error
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buf, err = repo.LoadBlob(context.TODO(), restic.DataBlob, id, buf)
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// Checking the SHA-256 with restic.Hash can make up 38% of the time
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// spent in this loop, so pause the timer.
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b.StopTimer()
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rtest.OK(b, err)
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if len(buf) != length {
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b.Errorf("wanted %d bytes, got %d", length, len(buf))
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}
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id2 := restic.Hash(buf)
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if !id.Equal(id2) {
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b.Errorf("wrong data returned, wanted %v, got %v", id.Str(), id2.Str())
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}
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b.StartTimer()
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}
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}
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func BenchmarkLoadUnpacked(b *testing.B) {
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repository.BenchmarkAllVersions(b, benchmarkLoadUnpacked)
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}
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func benchmarkLoadUnpacked(b *testing.B, version uint) {
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repo, cleanup := repository.TestRepositoryWithVersion(b, version)
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defer cleanup()
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length := 1000000
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buf := restic.NewBlobBuffer(length)
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_, err := io.ReadFull(rnd, buf)
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rtest.OK(b, err)
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dataID := restic.Hash(buf)
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storageID, err := repo.SaveUnpacked(context.TODO(), restic.PackFile, buf)
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rtest.OK(b, err)
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// rtest.OK(b, repo.Flush())
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b.ResetTimer()
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b.SetBytes(int64(length))
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for i := 0; i < b.N; i++ {
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data, err := repo.LoadUnpacked(context.TODO(), nil, restic.PackFile, storageID)
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rtest.OK(b, err)
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// See comment in BenchmarkLoadBlob.
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b.StopTimer()
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if len(data) != length {
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b.Errorf("wanted %d bytes, got %d", length, len(data))
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}
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id2 := restic.Hash(data)
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if !dataID.Equal(id2) {
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b.Errorf("wrong data returned, wanted %v, got %v", storageID.Str(), id2.Str())
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}
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b.StartTimer()
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}
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}
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func TestLoadJSONUnpacked(t *testing.T) {
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repository.TestAllVersions(t, testLoadJSONUnpacked)
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}
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func testLoadJSONUnpacked(t *testing.T, version uint) {
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repo, cleanup := repository.TestRepositoryWithVersion(t, version)
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defer cleanup()
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if rtest.BenchArchiveDirectory == "" {
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t.Skip("benchdir not set, skipping")
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}
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// archive a snapshot
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sn := restic.Snapshot{}
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sn.Hostname = "foobar"
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sn.Username = "test!"
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id, err := repo.SaveJSONUnpacked(context.TODO(), restic.SnapshotFile, &sn)
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rtest.OK(t, err)
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var sn2 restic.Snapshot
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// restore
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err = repo.LoadJSONUnpacked(context.TODO(), restic.SnapshotFile, id, &sn2)
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rtest.OK(t, err)
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rtest.Equals(t, sn.Hostname, sn2.Hostname)
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rtest.Equals(t, sn.Username, sn2.Username)
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var cf restic.Config
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// load and check Config
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err = repo.LoadJSONUnpacked(context.TODO(), restic.ConfigFile, id, &cf)
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rtest.OK(t, err)
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rtest.Equals(t, cf.ChunkerPolynomial, repository.TestChunkerPol)
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}
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var repoFixture = filepath.Join("testdata", "test-repo.tar.gz")
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func TestRepositoryLoadIndex(t *testing.T) {
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repodir, cleanup := rtest.Env(t, repoFixture)
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defer cleanup()
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repo := repository.TestOpenLocal(t, repodir)
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rtest.OK(t, repo.LoadIndex(context.TODO()))
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}
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// loadIndex loads the index id from backend and returns it.
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func loadIndex(ctx context.Context, repo restic.Repository, id restic.ID) (*repository.Index, error) {
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buf, err := repo.LoadUnpacked(ctx, nil, restic.IndexFile, id)
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if err != nil {
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return nil, err
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}
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idx, oldFormat, err := repository.DecodeIndex(buf, id)
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if oldFormat {
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fmt.Fprintf(os.Stderr, "index %v has old format\n", id.Str())
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}
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return idx, err
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}
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func BenchmarkLoadIndex(b *testing.B) {
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repository.BenchmarkAllVersions(b, benchmarkLoadIndex)
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}
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func benchmarkLoadIndex(b *testing.B, version uint) {
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repository.TestUseLowSecurityKDFParameters(b)
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repo, cleanup := repository.TestRepositoryWithVersion(b, version)
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defer cleanup()
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idx := repository.NewIndex()
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for i := 0; i < 5000; i++ {
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idx.StorePack(restic.NewRandomID(), []restic.Blob{
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{
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BlobHandle: restic.NewRandomBlobHandle(),
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Length: 1234,
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Offset: 1235,
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},
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})
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}
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id, err := repository.SaveIndex(context.TODO(), repo, idx)
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rtest.OK(b, err)
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b.Logf("index saved as %v", id.Str())
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fi, err := repo.Backend().Stat(context.TODO(), restic.Handle{Type: restic.IndexFile, Name: id.String()})
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rtest.OK(b, err)
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b.Logf("filesize is %v", fi.Size)
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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_, err := loadIndex(context.TODO(), repo, id)
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rtest.OK(b, err)
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}
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}
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// saveRandomDataBlobs generates random data blobs and saves them to the repository.
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func saveRandomDataBlobs(t testing.TB, repo restic.Repository, num int, sizeMax int) {
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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 < num; i++ {
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size := rand.Int() % sizeMax
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buf := make([]byte, size)
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_, err := io.ReadFull(rnd, buf)
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rtest.OK(t, err)
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_, _, _, err = repo.SaveBlob(context.TODO(), restic.DataBlob, buf, restic.ID{}, false)
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rtest.OK(t, err)
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}
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}
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func TestRepositoryIncrementalIndex(t *testing.T) {
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repository.TestAllVersions(t, testRepositoryIncrementalIndex)
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}
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func testRepositoryIncrementalIndex(t *testing.T, version uint) {
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r, cleanup := repository.TestRepositoryWithVersion(t, version)
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defer cleanup()
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repo := r.(*repository.Repository)
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repository.IndexFull = func(*repository.Index, bool) bool { return true }
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// add a few rounds of packs
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for j := 0; j < 5; j++ {
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// add some packs, write intermediate index
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saveRandomDataBlobs(t, repo, 20, 1<<15)
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rtest.OK(t, repo.Flush(context.TODO()))
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}
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// save final index
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rtest.OK(t, repo.Flush(context.TODO()))
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packEntries := make(map[restic.ID]map[restic.ID]struct{})
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err := repo.List(context.TODO(), restic.IndexFile, func(id restic.ID, size int64) error {
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idx, err := loadIndex(context.TODO(), repo, id)
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rtest.OK(t, err)
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for pb := range idx.Each(context.TODO()) {
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if _, ok := packEntries[pb.PackID]; !ok {
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packEntries[pb.PackID] = make(map[restic.ID]struct{})
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}
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packEntries[pb.PackID][id] = struct{}{}
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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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for packID, ids := range packEntries {
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if len(ids) > 1 {
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t.Errorf("pack %v listed in %d indexes\n", packID, len(ids))
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}
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}
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}
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// buildPackfileWithoutHeader returns a manually built pack file without a header.
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func buildPackfileWithoutHeader(t testing.TB, blobSizes []int, key *crypto.Key, compress bool) (blobs []restic.Blob, packfile []byte) {
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opts := []zstd.EOption{
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// Set the compression level configured.
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zstd.WithEncoderLevel(zstd.SpeedDefault),
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// Disable CRC, we have enough checks in place, makes the
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// compressed data four bytes shorter.
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zstd.WithEncoderCRC(false),
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// Set a window of 512kbyte, so we have good lookbehind for usual
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// blob sizes.
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zstd.WithWindowSize(512 * 1024),
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}
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enc, err := zstd.NewWriter(nil, opts...)
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if err != nil {
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panic(err)
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}
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var offset uint
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for i, size := range blobSizes {
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plaintext := test.Random(800+i, size)
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id := restic.Hash(plaintext)
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uncompressedLength := uint(0)
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if compress {
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uncompressedLength = uint(len(plaintext))
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plaintext = enc.EncodeAll(plaintext, nil)
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}
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// we use a deterministic nonce here so the whole process is
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// deterministic, last byte is the blob index
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var nonce = []byte{
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0x15, 0x98, 0xc0, 0xf7, 0xb9, 0x65, 0x97, 0x74,
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0x12, 0xdc, 0xd3, 0x62, 0xa9, 0x6e, 0x20, byte(i),
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}
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before := len(packfile)
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packfile = append(packfile, nonce...)
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packfile = key.Seal(packfile, nonce, plaintext, nil)
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after := len(packfile)
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ciphertextLength := after - before
|
|
|
|
blobs = append(blobs, restic.Blob{
|
|
BlobHandle: restic.BlobHandle{
|
|
Type: restic.DataBlob,
|
|
ID: id,
|
|
},
|
|
Length: uint(ciphertextLength),
|
|
UncompressedLength: uncompressedLength,
|
|
Offset: offset,
|
|
})
|
|
|
|
offset = uint(len(packfile))
|
|
}
|
|
|
|
return blobs, packfile
|
|
}
|
|
|
|
func TestStreamPack(t *testing.T) {
|
|
repository.TestAllVersions(t, testStreamPack)
|
|
}
|
|
|
|
func testStreamPack(t *testing.T, version uint) {
|
|
// always use the same key for deterministic output
|
|
const jsonKey = `{"mac":{"k":"eQenuI8adktfzZMuC8rwdA==","r":"k8cfAly2qQSky48CQK7SBA=="},"encrypt":"MKO9gZnRiQFl8mDUurSDa9NMjiu9MUifUrODTHS05wo="}`
|
|
|
|
var key crypto.Key
|
|
err := json.Unmarshal([]byte(jsonKey), &key)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
blobSizes := []int{
|
|
10,
|
|
5231,
|
|
18812,
|
|
123123,
|
|
12301,
|
|
892242,
|
|
28616,
|
|
13351,
|
|
252287,
|
|
188883,
|
|
2522811,
|
|
18883,
|
|
}
|
|
|
|
var compress bool
|
|
switch version {
|
|
case 1:
|
|
compress = false
|
|
case 2:
|
|
compress = true
|
|
default:
|
|
t.Fatal("test does not suport repository version", version)
|
|
}
|
|
|
|
packfileBlobs, packfile := buildPackfileWithoutHeader(t, blobSizes, &key, compress)
|
|
|
|
load := func(ctx context.Context, h restic.Handle, length int, offset int64, fn func(rd io.Reader) error) error {
|
|
data := packfile
|
|
|
|
if offset > int64(len(data)) {
|
|
offset = 0
|
|
length = 0
|
|
}
|
|
data = data[offset:]
|
|
|
|
if length > len(data) {
|
|
length = len(data)
|
|
}
|
|
|
|
data = data[:length]
|
|
|
|
return fn(bytes.NewReader(data))
|
|
|
|
}
|
|
|
|
// first, test regular usage
|
|
t.Run("regular", func(t *testing.T) {
|
|
tests := []struct {
|
|
blobs []restic.Blob
|
|
}{
|
|
{packfileBlobs[1:2]},
|
|
{packfileBlobs[2:5]},
|
|
{packfileBlobs[2:8]},
|
|
{[]restic.Blob{
|
|
packfileBlobs[0],
|
|
packfileBlobs[8],
|
|
packfileBlobs[4],
|
|
}},
|
|
{[]restic.Blob{
|
|
packfileBlobs[0],
|
|
packfileBlobs[len(packfileBlobs)-1],
|
|
}},
|
|
}
|
|
|
|
for _, test := range tests {
|
|
t.Run("", func(t *testing.T) {
|
|
ctx, cancel := context.WithCancel(context.Background())
|
|
defer cancel()
|
|
|
|
gotBlobs := make(map[restic.ID]int)
|
|
|
|
handleBlob := func(blob restic.BlobHandle, buf []byte, err error) error {
|
|
gotBlobs[blob.ID]++
|
|
|
|
id := restic.Hash(buf)
|
|
if !id.Equal(blob.ID) {
|
|
t.Fatalf("wrong id %v for blob %s returned", id, blob.ID)
|
|
}
|
|
|
|
return err
|
|
}
|
|
|
|
wantBlobs := make(map[restic.ID]int)
|
|
for _, blob := range test.blobs {
|
|
wantBlobs[blob.ID] = 1
|
|
}
|
|
|
|
err = repository.StreamPack(ctx, load, &key, restic.ID{}, test.blobs, handleBlob)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
if !cmp.Equal(wantBlobs, gotBlobs) {
|
|
t.Fatal(cmp.Diff(wantBlobs, gotBlobs))
|
|
}
|
|
})
|
|
}
|
|
})
|
|
|
|
// next, test invalid uses, which should return an error
|
|
t.Run("invalid", func(t *testing.T) {
|
|
tests := []struct {
|
|
blobs []restic.Blob
|
|
err string
|
|
}{
|
|
{
|
|
// pass one blob several times
|
|
blobs: []restic.Blob{
|
|
packfileBlobs[3],
|
|
packfileBlobs[8],
|
|
packfileBlobs[3],
|
|
packfileBlobs[4],
|
|
},
|
|
err: "overlapping blobs in pack",
|
|
},
|
|
|
|
{
|
|
// pass something that's not a valid blob in the current pack file
|
|
blobs: []restic.Blob{
|
|
{
|
|
Offset: 123,
|
|
Length: 20000,
|
|
},
|
|
},
|
|
err: "ciphertext verification failed",
|
|
},
|
|
|
|
{
|
|
// pass a blob that's too small
|
|
blobs: []restic.Blob{
|
|
{
|
|
Offset: 123,
|
|
Length: 10,
|
|
},
|
|
},
|
|
err: "invalid blob length",
|
|
},
|
|
}
|
|
|
|
for _, test := range tests {
|
|
t.Run("", func(t *testing.T) {
|
|
ctx, cancel := context.WithCancel(context.Background())
|
|
defer cancel()
|
|
|
|
handleBlob := func(blob restic.BlobHandle, buf []byte, err error) error {
|
|
return err
|
|
}
|
|
|
|
err = repository.StreamPack(ctx, load, &key, restic.ID{}, test.blobs, handleBlob)
|
|
if err == nil {
|
|
t.Fatalf("wanted error %v, got nil", test.err)
|
|
}
|
|
|
|
if !strings.Contains(err.Error(), test.err) {
|
|
t.Fatalf("wrong error returned, it should contain %q but was %q", test.err, err)
|
|
}
|
|
})
|
|
}
|
|
})
|
|
}
|