nread uint64 // number of bytes read so far
	f     *File
	desr  io.Reader // if non-nil, where to read the data descriptor
	err   error     // sticky error
}

func (r *checksumReader) Stat() (fs.FileInfo, error) {
	return headerFileInfo{&r.f.FileHeader}, nil
}

func (r *checksumReader) Read(b []byte) (n int, err error) {
	if r.err != nil {
		return 0, r.err
	}
	n, err = r.rc.Read(b)

pkg os, method (*Root) Close() error #67002
pkg os, method (*Root) Create(string) (*File, error) #67002
pkg os, method (*Root) FS() fs.FS #67002
pkg os, method (*Root) Lstat(string) (fs.FileInfo, error) #67002
pkg os, method (*Root) Mkdir(string, fs.FileMode) error #67002
pkg os, method (*Root) Name() string #67002
pkg os, method (*Root) Open(string) (*File, error) #67002

	storageReadVersionRPC      = grid.NewSingleHandler[*grid.MSS, *FileInfo](grid.HandlerReadVersion, grid.NewMSS, func() *FileInfo { return &FileInfo{} })
	storageReadXLRPC           = grid.NewSingleHandler[*grid.MSS, *RawFileInfo](grid.HandlerReadXL, grid.NewMSS, func() *RawFileInfo { return &RawFileInfo{} })

			NoAuditLog: true,
		})
	if err != nil {
		err = fmt.Errorf("decommissionObject: PutObject() %w", err)
	}
	return err
}

// versionsSorter sorts FileInfo slices by version.
//
//msgp:ignore versionsSorter
type versionsSorter []FileInfo

func (v versionsSorter) reverse() {
	sort.Slice(v, func(i, j int) bool {
		return v[i].ModTime.Before(v[j].ModTime)
	})
}

	failOnErr := func(err error) {
		t.Helper()
		if err != nil {
			t.Fatal(err)
		}
	}
	data := []byte("some object data")
	data2 := []byte("some other object data")

	xl := xlMetaV2{}
	fi := FileInfo{
		Volume:           "volume",
		Name:             "object-name",
		VersionID:        "756100c6-b393-4981-928a-d49bbc164741",
		IsLatest:         true,
		Deleted:          false,
		TransitionStatus: "",

	NoAuditLog     bool // Only set for decom, rebalance, to avoid double audits.
}

// WalkOptions provides filtering, marker and other Walk() specific options.
type WalkOptions struct {
	Filter       func(info FileInfo) bool // return WalkFilter returns 'true/false'
	Marker       string                   // set to skip until this object
	LatestOnly   bool                     // returns only latest versions for all matching objects

	}
}

func BenchmarkMarshalMsgFileInfo(b *testing.B) {
	v := FileInfo{}
	b.ReportAllocs()
	b.ResetTimer()
	for i := 0; i < b.N; i++ {
		v.MarshalMsg(nil)
	}
}

func BenchmarkAppendMsgFileInfo(b *testing.B) {
	v := FileInfo{}
	bts := make([]byte, 0, v.Msgsize())
	bts, _ = v.MarshalMsg(bts[0:0])
	b.SetBytes(int64(len(bts)))

	Participating     bool          `json:"participating" msg:"par"`
	Info              rebalanceInfo `json:"info" msg:"inf"`
}

func (rs *rebalanceStats) update(bucket string, fi FileInfo) {
	if fi.IsLatest {
		rs.NumObjects++
	}

	rs.NumVersions++
	onDiskSz := int64(0)
	if !fi.Deleted {
		onDiskSz = fi.Size * int64(fi.Erasure.DataBlocks+fi.Erasure.ParityBlocks) / int64(fi.Erasure.DataBlocks)

// io.ErrUnexpectedEOF is returned if the place containing the marker hasn't been scanned yet.
// io.EOF indicates the marker is beyond the end of the stream and does not exist.
func (o *listPathOptions) findFirstPart(fi FileInfo) (int, error) {
	search := o.Marker
	if search == "" {
		search = o.Prefix
	}
	if search == "" {
		return 0, nil
	}
	o.debugln("searching for ", search)
	var tmp metacacheBlock

// Migrates all previous versions to latest version of `format.json`,
// this code calls migration in sequence, such as V1 is migrated to V2
// first before it V2 migrates to V3.n
func formatErasureMigrate(export string) ([]byte, fs.FileInfo, error) {
	formatPath := pathJoin(export, minioMetaBucket, formatConfigFile)
	formatData, formatFi, err := xioutil.ReadFileWithFileInfo(formatPath)
	if err != nil {
		return nil, nil, err
	}