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