// Enabling this will make cache sharing more likely and cause less IO,
	// but may cause additional latency to some calls.
	metacacheSharePrefix = false
)

//go:generate msgp -file $GOFILE -unexported

// metacache contains a tracked cache entry.
type metacache struct {
	// do not re-arrange the struct this struct has been ordered to use less
	// space - if you do so please run https://github.com/orijtech/structslop

	// 	}
	// }

	check := func(exp, got madmin.LockEntries) (int, bool) {
		if len(exp) != len(got) {
			return 0, false
		}
		sort.Slice(exp, byResourceUID{exp}.Less)
		sort.Slice(got, byResourceUID{got}.Less)
		// printEntries(exp)
		// printEntries(got)
		for i, e := range exp {
			if !e.Timestamp.Equal(got[i].Timestamp) {
				return i, false
			}

	errMetaCode := checkMetaHeaders(extractedSignedHeaders, r)
	if errMetaCode != ErrNone {
		return errMetaCode
	}

	// If the host which signed the request is slightly ahead in time (by less than globalMaxSkewTime) the
	// request should still be allowed.
	if pSignValues.Date.After(UTCNow().Add(globalMaxSkewTime)) {
		return ErrRequestNotReadyYet
	}

		cacheDuration = defaultCacheDuration
	}
	if cacheDuration < time.Second {
		logger.LogOnceIf(ctx, errors.New("cache duration is less than 1s, using default of 10s"), "refresh-kms-master-key")
		cacheDuration = defaultCacheDuration
	}
	timer := time.NewTimer(cacheDuration)
	defer timer.Stop()

	for {
		select {
		case <-ctx.Done():

				}, w)
			}

			// fallback only when set.
			for {
				fd := fallback(werr)
				if fd == nil {
					break
				}
				// This fallback is only set when
				// askDisks is less than total
				// number of disks per set.
				werr = fd.WalkDir(ctx, WalkDirOptions{
					Limit:          opts.perDiskLimit,
					Bucket:         opts.bucket,
					BaseDir:        opts.path,

		// clients detect malformed certificates during testing instead of e.g.
		// a self-signed certificate that works while a comparable certificate
		// issued by a trusted CA fails due to the MinIO server being less strict
		// w.r.t. key usage verification.
		//
		// Basically, MinIO is more consistent (from a client perspective) when
		// we verify the key usage all the time.
		var validKeyUsage bool

	if !opts.NoAuditLog {
		auditObjectErasureSet(ctx, object, &er)
	}

	data := r.Reader
	// Validate input data size and it can never be less than zero.
	if data.Size() < -1 {
		bugLogIf(ctx, errInvalidArgument, logger.ErrorKind)
		return pi, toObjectErr(errInvalidArgument)
	}

	// Read lock for upload id.

	}
	return madmin.TraceInfo{
		TraceType: madmin.TraceFTP,
		Time:      startTime,
		NodeName:  globalLocalNodeName,
		FuncName:  fmt.Sprintf("ftp USER=%s COMMAND=%s PARAM=%s ISLOGIN=%t, Source=%s", s.Sess.LoginUser(), s.Cmd, s.Param, s.Sess.IsLogin(), source),
		Duration:  time.Since(startTime),
		Path:      objPath,
		Error:     errStr,
	}
}

func (m *ftpMetrics) log(s *ftp.Context, paths ...string) func(err error) {

			expectedError: hash.BadDigest{ExpectedMD5: "e2fc714c4727ee9395f324cd2e7f331e", CalculatedMD5: "e2fc714c4727ee9395f324cd2e7f331f"},
		},

		// Input with size less than the size of actual data inside the reader.
		9: {
			bucketName: bucket, objName: object, inputData: []byte("abcd"),

				// Reading first time on this disk, hence the buffer needs to be allocated.
				// Subsequent reads will reuse this buffer.
				p.buf[bufIdx] = make([]byte, p.shardSize)
			}
			// For the last shard, the shardsize might be less than previous shard sizes.
			// Hence the following statement ensures that the buffer size is reset to the right size.
			p.buf[bufIdx] = p.buf[bufIdx][:p.shardSize]
			n, err := rr.ReadAt(p.buf[bufIdx], p.offset)