mirror of
https://github.com/octoleo/restic.git
synced 2024-11-10 15:21:03 +00:00
Merge pull request #745 from restic/fix-742
Fix restore/fuse with larger files
This commit is contained in:
Alexander Neumann
commit
17d7af6ccc
@ -7,6 +7,7 @@ import (
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"fmt"
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"io"
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"io/ioutil"
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mrand "math/rand"
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"os"
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"path/filepath"
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"regexp"
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@ -739,6 +740,30 @@ func TestRestoreFilter(t *testing.T) {
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})
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}
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func TestRestore(t *testing.T) {
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withTestEnvironment(t, func(env *testEnvironment, gopts GlobalOptions) {
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testRunInit(t, gopts)
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for i := 0; i < 10; i++ {
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p := filepath.Join(env.testdata, fmt.Sprintf("foo/bar/testfile%v", i))
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OK(t, os.MkdirAll(filepath.Dir(p), 0755))
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OK(t, appendRandomData(p, uint(mrand.Intn(5<<21))))
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}
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opts := BackupOptions{}
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testRunBackup(t, []string{env.testdata}, opts, gopts)
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testRunCheck(t, gopts)
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// Restore latest without any filters
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restoredir := filepath.Join(env.base, "restore")
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testRunRestoreLatest(t, gopts, restoredir, nil, "")
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Assert(t, directoriesEqualContents(env.testdata, filepath.Join(restoredir, filepath.Base(env.testdata))),
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"directories are not equal")
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})
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}
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func TestRestoreLatest(t *testing.T) {
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withTestEnvironment(t, func(env *testEnvironment, gopts GlobalOptions) {
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@ -9,7 +9,6 @@ import (
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"restic"
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"restic/archiver"
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"restic/backend/mem"
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"restic/checker"
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"restic/repository"
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"restic/test"
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@ -249,19 +248,15 @@ func induceError(data []byte) {
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}
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func TestCheckerModifiedData(t *testing.T) {
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be := mem.New()
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repository.TestUseLowSecurityKDFParameters(t)
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repo := repository.New(be)
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test.OK(t, repo.Init(test.TestPassword))
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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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_, id, err := arch.Snapshot(nil, []string{"."}, nil, nil)
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test.OK(t, err)
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t.Logf("archived as %v", id.Str())
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beError := &errorBackend{Backend: be}
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beError := &errorBackend{Backend: repo.Backend()}
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checkRepo := repository.New(beError)
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test.OK(t, checkRepo.SearchKey(test.TestPassword, 5))
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@ -4,8 +4,6 @@
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package fuse
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import (
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"sync"
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"restic/errors"
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"restic"
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@ -35,29 +33,23 @@ type file struct {
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node *restic.Node
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ownerIsRoot bool
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sizes []uint
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sizes []int
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blobs [][]byte
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}
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const defaultBlobSize = 128 * 1024
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var blobPool = sync.Pool{
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New: func() interface{} {
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return make([]byte, defaultBlobSize)
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},
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}
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func newFile(repo BlobLoader, node *restic.Node, ownerIsRoot bool) (*file, error) {
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debug.Log("create new file for %v with %d blobs", node.Name, len(node.Content))
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var bytes uint64
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sizes := make([]uint, len(node.Content))
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sizes := make([]int, len(node.Content))
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for i, id := range node.Content {
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size, err := repo.LookupBlobSize(id, restic.DataBlob)
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if err != nil {
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return nil, err
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}
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sizes[i] = size
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sizes[i] = int(size)
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bytes += uint64(size)
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}
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@ -99,16 +91,7 @@ func (f *file) getBlobAt(i int) (blob []byte, err error) {
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return f.blobs[i], nil
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}
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buf := blobPool.Get().([]byte)
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buf = buf[:cap(buf)]
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if uint(len(buf)) < f.sizes[i] {
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if len(buf) > defaultBlobSize {
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blobPool.Put(buf)
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}
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buf = make([]byte, f.sizes[i])
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}
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buf := restic.NewBlobBuffer(f.sizes[i])
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n, err := f.repo.LoadBlob(restic.DataBlob, f.node.Content[i], buf)
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if err != nil {
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debug.Log("LoadBlob(%v, %v) failed: %v", f.node.Name, f.node.Content[i], err)
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@ -169,10 +152,7 @@ func (f *file) Read(ctx context.Context, req *fuse.ReadRequest, resp *fuse.ReadR
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func (f *file) Release(ctx context.Context, req *fuse.ReleaseRequest) error {
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for i := range f.blobs {
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if f.blobs[i] != nil {
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blobPool.Put(f.blobs[i])
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f.blobs[i] = nil
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}
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f.blobs[i] = nil
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}
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return nil
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}
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@ -9,7 +9,9 @@ import (
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"testing"
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"time"
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"restic/errors"
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"golang.org/x/net/context"
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"restic/repository"
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"bazil.org/fuse"
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@ -17,108 +19,96 @@ import (
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. "restic/test"
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)
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type MockRepo struct {
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blobs map[restic.ID][]byte
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}
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func NewMockRepo(content map[restic.ID][]byte) *MockRepo {
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return &MockRepo{blobs: content}
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}
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func (m *MockRepo) LookupBlobSize(id restic.ID, t restic.BlobType) (uint, error) {
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buf, ok := m.blobs[id]
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if !ok {
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return 0, errors.New("blob not found")
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}
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return uint(len(buf)), nil
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}
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func (m *MockRepo) LoadBlob(t restic.BlobType, id restic.ID, buf []byte) (int, error) {
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size, err := m.LookupBlobSize(id, t)
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if err != nil {
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return 0, err
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}
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if uint(len(buf)) < size {
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return 0, errors.New("buffer too small")
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}
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buf = buf[:size]
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copy(buf, m.blobs[id])
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return int(size), nil
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}
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type MockContext struct{}
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func (m MockContext) Deadline() (time.Time, bool) { return time.Now(), false }
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func (m MockContext) Done() <-chan struct{} { return nil }
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func (m MockContext) Err() error { return nil }
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func (m MockContext) Value(key interface{}) interface{} { return nil }
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var testContent = genTestContent()
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var testContentLengths = []uint{
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4646 * 1024,
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655 * 1024,
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378 * 1024,
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8108 * 1024,
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558 * 1024,
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}
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var testMaxFileSize uint
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func genTestContent() map[restic.ID][]byte {
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m := make(map[restic.ID][]byte)
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for _, length := range testContentLengths {
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buf := Random(int(length), int(length))
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id := restic.Hash(buf)
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m[id] = buf
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testMaxFileSize += length
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}
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return m
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}
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const maxBufSize = 20 * 1024 * 1024
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func testRead(t *testing.T, f *file, offset, length int, data []byte) {
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ctx := MockContext{}
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func testRead(t testing.TB, f *file, offset, length int, data []byte) {
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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req := &fuse.ReadRequest{
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Offset: int64(offset),
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Size: length,
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}
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resp := &fuse.ReadResponse{
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Data: make([]byte, length),
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Data: data,
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}
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OK(t, f.Read(ctx, req, resp))
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}
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var offsetReadsTests = []struct {
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offset, length int
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}{
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{0, 5 * 1024 * 1024},
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{4000 * 1024, 1000 * 1024},
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func firstSnapshotID(t testing.TB, repo restic.Repository) (first restic.ID) {
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done := make(chan struct{})
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defer close(done)
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for id := range repo.List(restic.SnapshotFile, done) {
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if first.IsNull() {
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first = id
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}
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}
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return first
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}
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func loadFirstSnapshot(t testing.TB, repo restic.Repository) *restic.Snapshot {
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id := firstSnapshotID(t, repo)
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sn, err := restic.LoadSnapshot(repo, id)
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OK(t, err)
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return sn
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}
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func loadTree(t testing.TB, repo restic.Repository, id restic.ID) *restic.Tree {
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tree, err := repo.LoadTree(id)
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OK(t, err)
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return tree
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}
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func TestFuseFile(t *testing.T) {
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repo := NewMockRepo(testContent)
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ctx := MockContext{}
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repo, cleanup := repository.TestRepository(t)
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defer cleanup()
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memfile := make([]byte, 0, maxBufSize)
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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timestamp, err := time.Parse(time.RFC3339, "2017-01-24T10:42:56+01:00")
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OK(t, err)
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restic.TestCreateSnapshot(t, repo, timestamp, 2, 0.1)
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sn := loadFirstSnapshot(t, repo)
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tree := loadTree(t, repo, *sn.Tree)
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var content restic.IDs
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for _, node := range tree.Nodes {
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content = append(content, node.Content...)
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}
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t.Logf("tree loaded, content: %v", content)
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var (
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filesize uint64
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memfile []byte
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)
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for _, id := range content {
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size, err := repo.LookupBlobSize(id, restic.DataBlob)
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OK(t, err)
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filesize += uint64(size)
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buf := restic.NewBlobBuffer(int(size))
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n, err := repo.LoadBlob(restic.DataBlob, id, buf)
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OK(t, err)
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if uint(n) != size {
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t.Fatalf("not enough bytes read for id %v: want %v, got %v", id.Str(), size, n)
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}
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if uint(len(buf)) != size {
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t.Fatalf("buffer has wrong length for id %v: want %v, got %v", id.Str(), size, len(buf))
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}
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var ids restic.IDs
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for id, buf := range repo.blobs {
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ids = append(ids, id)
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memfile = append(memfile, buf...)
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}
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t.Logf("filesize is %v, memfile has size %v", filesize, len(memfile))
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node := &restic.Node{
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Name: "foo",
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Inode: 23,
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Mode: 0742,
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Size: 42,
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Content: ids,
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Size: filesize,
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Content: content,
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}
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f, err := newFile(repo, node, false)
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OK(t, err)
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@ -131,28 +121,19 @@ func TestFuseFile(t *testing.T) {
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Equals(t, node.Size, attr.Size)
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Equals(t, (node.Size/uint64(attr.BlockSize))+1, attr.Blocks)
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for i, test := range offsetReadsTests {
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b := memfile[test.offset : test.offset+test.length]
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buf := make([]byte, test.length)
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testRead(t, f, test.offset, test.length, buf)
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if !bytes.Equal(b, buf) {
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t.Errorf("test %d failed, wrong data returned", i)
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}
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}
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for i := 0; i < 200; i++ {
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length := rand.Intn(int(testMaxFileSize) / 2)
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offset := rand.Intn(int(testMaxFileSize))
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if length+offset > int(testMaxFileSize) {
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diff := length + offset - int(testMaxFileSize)
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length -= diff
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}
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offset := rand.Intn(int(filesize))
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length := rand.Intn(int(filesize)-offset) + 100
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b := memfile[offset : offset+length]
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buf := make([]byte, length)
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testRead(t, f, offset, length, buf)
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if !bytes.Equal(b, buf) {
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t.Errorf("test %d failed (offset %d, length %d), wrong data returned", i, offset, length)
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t.Errorf("test %d failed, wrong data returned (offset %v, length %v)", i, offset, length)
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}
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}
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OK(t, f.Release(ctx, nil))
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}
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@ -2,6 +2,7 @@ package restic
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import (
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"io"
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"restic/debug"
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)
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type backendReaderAt struct {
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@ -20,6 +21,7 @@ func ReaderAt(be Backend, h Handle) io.ReaderAt {
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// ReadAt reads from the backend handle h at the given position.
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func ReadAt(be Backend, h Handle, offset int64, p []byte) (n int, err error) {
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debug.Log("ReadAt(%v) at %v, len %v", h, offset, len(p))
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rd, err := be.Load(h, len(p), offset)
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if err != nil {
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return 0, err
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@ -31,5 +33,7 @@ func ReadAt(be Backend, h Handle, offset int64, p []byte) (n int, err error) {
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err = e
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}
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debug.Log("ReadAt(%v) ReadFull returned %v bytes", h, n)
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|
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return n, err
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}
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@ -77,7 +77,7 @@ func (r *Repository) LoadAndDecrypt(t restic.FileType, id restic.ID) ([]byte, er
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// pack from the backend, the result is stored in plaintextBuf, which must be
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// large enough to hold the complete blob.
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func (r *Repository) loadBlob(id restic.ID, t restic.BlobType, plaintextBuf []byte) (int, error) {
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debug.Log("load %v with id %v (buf %p, len %d)", t, id.Str(), plaintextBuf, len(plaintextBuf))
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debug.Log("load %v with id %v (buf len %v, cap %d)", t, id.Str(), len(plaintextBuf), cap(plaintextBuf))
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|
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// lookup packs
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blobs, err := r.idx.Lookup(id, t)
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@ -96,7 +96,12 @@ func (r *Repository) loadBlob(id restic.ID, t restic.BlobType, plaintextBuf []by
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|
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// load blob from pack
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h := restic.Handle{Type: restic.DataFile, Name: blob.PackID.String()}
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plaintextBuf = plaintextBuf[:cap(plaintextBuf)]
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|
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if uint(cap(plaintextBuf)) < blob.Length {
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return 0, errors.Errorf("buffer is too small: %v < %v", cap(plaintextBuf), blob.Length)
|
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}
|
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|
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plaintextBuf = plaintextBuf[:blob.Length]
|
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|
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n, err := restic.ReadAt(r.be, h, int64(blob.Offset), plaintextBuf)
|
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if err != nil {
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@ -520,15 +525,14 @@ func (r *Repository) Close() error {
|
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// be large enough to hold the encrypted blob, since it is used as scratch
|
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// space.
|
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func (r *Repository) LoadBlob(t restic.BlobType, id restic.ID, buf []byte) (int, error) {
|
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debug.Log("load blob %v into buf %p", id.Str(), buf)
|
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debug.Log("load blob %v into buf (len %v, cap %v)", id.Str(), len(buf), cap(buf))
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size, err := r.idx.LookupSize(id, t)
|
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if err != nil {
|
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return 0, err
|
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}
|
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|
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buf = buf[:cap(buf)]
|
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if len(buf) < restic.CiphertextLength(int(size)) {
|
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return 0, errors.Errorf("buffer is too small for data blob (%d < %d)", len(buf), restic.CiphertextLength(int(size)))
|
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if cap(buf) < restic.CiphertextLength(int(size)) {
|
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return 0, errors.Errorf("buffer is too small for data blob (%d < %d)", cap(buf), restic.CiphertextLength(int(size)))
|
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}
|
||||
|
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n, err := r.loadBlob(id, t, buf)
|
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|
||||
@ -147,6 +147,51 @@ func BenchmarkLoadTree(t *testing.B) {
|
||||
}
|
||||
}
|
||||
|
||||
func TestLoadBlob(t *testing.T) {
|
||||
repo, cleanup := repository.TestRepository(t)
|
||||
defer cleanup()
|
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|
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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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OK(t, err)
|
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|
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id, err := repo.SaveBlob(restic.DataBlob, buf, restic.ID{})
|
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OK(t, err)
|
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OK(t, repo.Flush())
|
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|
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// first, test with buffers that are too small
|
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for _, testlength := range []int{length - 20, length, restic.CiphertextLength(length) - 1} {
|
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buf = make([]byte, 0, testlength)
|
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n, err := repo.LoadBlob(restic.DataBlob, id, buf)
|
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if err == nil {
|
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t.Errorf("LoadBlob() did not return an error for a buffer that is too small to hold the blob")
|
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continue
|
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}
|
||||
|
||||
if n != 0 {
|
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t.Errorf("LoadBlob() returned an error and n > 0")
|
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continue
|
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}
|
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}
|
||||
|
||||
// then use buffers that are large enough
|
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base := restic.CiphertextLength(length)
|
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for _, testlength := range []int{base, base + 7, base + 15, base + 1000} {
|
||||
buf = make([]byte, 0, testlength)
|
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n, err := repo.LoadBlob(restic.DataBlob, id, buf)
|
||||
if err != nil {
|
||||
t.Errorf("LoadBlob() returned an error for buffer size %v: %v", testlength, err)
|
||||
continue
|
||||
}
|
||||
|
||||
if n != length {
|
||||
t.Errorf("LoadBlob() returned the wrong number of bytes: want %v, got %v", length, n)
|
||||
continue
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func BenchmarkLoadBlob(b *testing.B) {
|
||||
repo, cleanup := repository.TestRepository(b)
|
||||
defer cleanup()
|
||||
|
||||
Loading…
Reference in New Issue
Block a user