forked from TrueCloudLab/restic
debug: extract examinePack function
This commit is contained in:
Michael Eischer
parent
84491ff40b
commit
096f15db5c
1 changed files with 101 additions and 97 deletions
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@ -426,103 +426,59 @@ func runDebugExamine(gopts GlobalOptions, args []string) error {
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return err
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}
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blobsLoaded := false
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for _, name := range args {
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fmt.Printf("examine %v\n", name)
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id, err := restic.ParseID(name)
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examinePack(gopts.ctx, repo, name)
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}
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return nil
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}
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func examinePack(ctx context.Context, repo restic.Repository, name string) {
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blobsLoaded := false
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fmt.Printf("examine %v\n", name)
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id, err := restic.ParseID(name)
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if err != nil {
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fmt.Fprintf(os.Stderr, "error: %v\n", err)
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}
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h := restic.Handle{
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Type: restic.PackFile,
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Name: name,
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}
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fi, err := repo.Backend().Stat(ctx, h)
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if err != nil {
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fmt.Fprintf(os.Stderr, "error: %v\n", err)
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}
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fmt.Printf(" file size is %v\n", fi.Size)
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buf, err := backend.LoadAll(ctx, nil, repo.Backend(), h)
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if err != nil {
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fmt.Fprintf(os.Stderr, "error: %v\n", err)
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}
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gotID := restic.Hash(buf)
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if !id.Equal(gotID) {
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fmt.Printf(" wanted hash %v, got %v\n", id, gotID)
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} else {
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fmt.Printf(" hash for file content matches\n")
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}
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fmt.Printf(" ========================================\n")
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fmt.Printf(" looking for info in the indexes\n")
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// examine all data the indexes have for the pack file
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for _, idx := range repo.Index().(*repository.MasterIndex).All() {
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idxIDs, err := idx.IDs()
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if err != nil {
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fmt.Fprintf(os.Stderr, "error: %v\n", err)
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idxIDs = restic.IDs{}
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}
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h := restic.Handle{
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Type: restic.PackFile,
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Name: name,
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}
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fi, err := repo.Backend().Stat(gopts.ctx, h)
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if err != nil {
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fmt.Fprintf(os.Stderr, "error: %v\n", err)
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blobs := idx.ListPack(id)
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if len(blobs) == 0 {
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continue
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}
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fmt.Printf(" file size is %v\n", fi.Size)
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buf, err := backend.LoadAll(gopts.ctx, nil, repo.Backend(), h)
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if err != nil {
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fmt.Fprintf(os.Stderr, "error: %v\n", err)
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}
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gotID := restic.Hash(buf)
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if !id.Equal(gotID) {
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fmt.Printf(" wanted hash %v, got %v\n", id, gotID)
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} else {
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fmt.Printf(" hash for file content matches\n")
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}
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fmt.Printf(" ========================================\n")
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fmt.Printf(" looking for info in the indexes\n")
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// examine all data the indexes have for the pack file
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for _, idx := range repo.Index().(*repository.MasterIndex).All() {
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idxIDs, err := idx.IDs()
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if err != nil {
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idxIDs = restic.IDs{}
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}
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blobs := idx.ListPack(id)
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if len(blobs) == 0 {
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continue
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}
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fmt.Printf(" index %v:\n", idxIDs)
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// track current size and offset
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var size, offset uint64
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sort.Slice(blobs, func(i, j int) bool {
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return blobs[i].Offset < blobs[j].Offset
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})
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for _, pb := range blobs {
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fmt.Printf(" %v blob %v, offset %-6d, raw length %-6d\n", pb.Type, pb.ID, pb.Offset, pb.Length)
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if offset != uint64(pb.Offset) {
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fmt.Printf(" hole in file, want offset %v, got %v\n", offset, pb.Offset)
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}
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offset += uint64(pb.Length)
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size += uint64(pb.Length)
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}
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// compute header size, per blob: 1 byte type, 4 byte length, 32 byte id
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size += uint64(restic.CiphertextLength(len(blobs) * (1 + 4 + 32)))
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// length in uint32 little endian
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size += 4
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if uint64(fi.Size) != size {
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fmt.Printf(" file sizes do not match: computed %v from index, file size is %v\n", size, fi.Size)
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} else {
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fmt.Printf(" file sizes match\n")
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}
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// convert list of blobs to []restic.Blob
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var list []restic.Blob
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for _, b := range blobs {
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list = append(list, b.Blob)
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}
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err = loadBlobs(gopts.ctx, repo, name, list)
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if err != nil {
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fmt.Fprintf(os.Stderr, "error: %v\n", err)
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} else {
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blobsLoaded = true
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}
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}
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fmt.Printf(" ========================================\n")
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fmt.Printf(" inspect the pack itself\n")
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blobs, _, err := pack.List(repo.Key(), restic.ReaderAt(gopts.ctx, repo.Backend(), h), fi.Size)
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if err != nil {
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fmt.Fprintf(os.Stderr, "error for pack %v: %v\n", id.Str(), err)
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return nil
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}
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fmt.Printf(" index %v:\n", idxIDs)
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// track current size and offset
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var size, offset uint64
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@ -551,12 +507,60 @@ func runDebugExamine(gopts GlobalOptions, args []string) error {
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fmt.Printf(" file sizes match\n")
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}
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if !blobsLoaded {
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err = loadBlobs(gopts.ctx, repo, name, blobs)
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if err != nil {
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fmt.Fprintf(os.Stderr, "error: %v\n", err)
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}
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// convert list of blobs to []restic.Blob
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var list []restic.Blob
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for _, b := range blobs {
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list = append(list, b.Blob)
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}
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err = loadBlobs(ctx, repo, name, list)
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if err != nil {
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fmt.Fprintf(os.Stderr, "error: %v\n", err)
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} else {
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blobsLoaded = true
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}
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}
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fmt.Printf(" ========================================\n")
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fmt.Printf(" inspect the pack itself\n")
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blobs, _, err := pack.List(repo.Key(), restic.ReaderAt(ctx, repo.Backend(), h), fi.Size)
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if err != nil {
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fmt.Fprintf(os.Stderr, "error for pack %v: %v\n", id.Str(), err)
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return
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}
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// track current size and offset
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var size, offset uint64
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sort.Slice(blobs, func(i, j int) bool {
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return blobs[i].Offset < blobs[j].Offset
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})
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for _, pb := range blobs {
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fmt.Printf(" %v blob %v, offset %-6d, raw length %-6d\n", pb.Type, pb.ID, pb.Offset, pb.Length)
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if offset != uint64(pb.Offset) {
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fmt.Printf(" hole in file, want offset %v, got %v\n", offset, pb.Offset)
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}
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offset += uint64(pb.Length)
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size += uint64(pb.Length)
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}
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// compute header size, per blob: 1 byte type, 4 byte length, 32 byte id
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size += uint64(restic.CiphertextLength(len(blobs) * (1 + 4 + 32)))
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// length in uint32 little endian
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size += 4
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if uint64(fi.Size) != size {
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fmt.Printf(" file sizes do not match: computed %v from index, file size is %v\n", size, fi.Size)
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} else {
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fmt.Printf(" file sizes match\n")
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}
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if !blobsLoaded {
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err = loadBlobs(ctx, repo, name, blobs)
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if err != nil {
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fmt.Fprintf(os.Stderr, "error: %v\n", err)
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}
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}
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return nil
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}
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