// For forward compatibility reasons, we need to add this code.
	if len(dataUsageInfo.BucketsUsage) == 0 {
		dataUsageInfo.BucketsUsage = make(map[string]BucketUsageInfo, len(dataUsageInfo.BucketSizes))
		for bucket, size := range dataUsageInfo.BucketSizes {
			dataUsageInfo.BucketsUsage[bucket] = BucketUsageInfo{Size: size}
		}
	}

	// For backward compatibility reasons, we need to add this code.
	if len(dataUsageInfo.BucketSizes) == 0 {

)

//go:generate msgp -file $GOFILE

var (
	errTierMissingCredentials = AdminError{
		Code:       "XMinioAdminTierMissingCredentials",
		Message:    "Specified remote credentials are empty",
		StatusCode: http.StatusForbidden,
	}

	errTierBackendInUse = AdminError{
		Code:       "XMinioAdminTierBackendInUse",
		Message:    "Specified remote tier is already in use",
		StatusCode: http.StatusConflict,

		writeErrorResponseString(r.Context(), w, APIError{
			Code:           "XMinioPeerVersionMismatch",
			Description:    desc,
			HTTPStatusCode: http.StatusUpgradeRequired,
		}, r.URL)
	case strings.HasPrefix(r.URL.Path, storageRESTPrefix):
		writeErrorResponseString(r.Context(), w, APIError{
			Code:           "XMinioStorageVersionMismatch",
			Description:    desc,

	}

	// Similar check to http.checkWriteHeaderCode
	if err.HTTPStatusCode < 100 || err.HTTPStatusCode > 999 {
		bugLogIf(ctx, fmt.Errorf("invalid WriteHeader code %v from %v", err.HTTPStatusCode, err.Code))
		err.HTTPStatusCode = http.StatusInternalServerError
	}

	// Generate error response.
	errorResponse := getAPIErrorResponse(ctx, err, reqURL.Path,

            "stacking": {
              "group": "A",
              "mode": "none"
            },
            "thresholdsStyle": {
              "mode": "off"
            }
          },
          "links": [],
          "mappings": [],
          "min": 0,
          "thresholds": {
            "mode": "absolute",
            "steps": [
              {
                "color": "green",

            "spanNulls": false,
            "stacking": {
              "group": "A",
              "mode": "none"
            },
            "thresholdsStyle": {
              "mode": "off"
            }
          },
          "mappings": [],
          "thresholds": {
            "mode": "absolute",
            "steps": [
              {
                "color": "green",
                "value": null

		return nil
	}

	if r.APIVersion != batchExpireAPIVersion {
		return batchExpireJobError{
			Code:           "InvalidArgument",
			Description:    "Unsupported batch expire API version",
			HTTPStatusCode: http.StatusBadRequest,
		}
	}

	if r.Bucket == "" {
		return batchExpireJobError{
			Code:           "InvalidArgument",
			Description:    "Bucket argument missing",
			HTTPStatusCode: http.StatusBadRequest,

		writeErrorResponse(ctx, w, APIError{
			Code:           "InvalidBucketState",
			Description:    "An Object Lock configuration is present on this bucket, versioning cannot be suspended.",
			HTTPStatusCode: http.StatusBadRequest,
		}, r.URL)
		return
	}
	if rc, _ := getReplicationConfig(ctx, bucket); rc != nil && v.Suspended() {
		writeErrorResponse(ctx, w, APIError{
			Code:           "InvalidBucketState",

	// Calling this returns true or false if the target
	// is online or offline.
	HealthCheckFn func() bool

	// HealthCheckRetryUnit will be used to calculate the exponential
	// backoff when trying to reconnect to an offline node
	HealthCheckReconnectUnit time.Duration

	// HealthCheckTimeout determines timeout for each call.
	HealthCheckTimeout time.Duration

	// MaxErrResponseSize is the maximum expected response size.

	// expected error response when the unsigned HTTP request is not permitted.
	accessDenied := getAPIError(ErrAccessDenied).HTTPStatusCode
	if rec.Code != accessDenied {
		t.Fatal(failTestStr(anonTestStr, fmt.Sprintf("Object API Nil Test expected to fail with %d, but failed with %d", accessDenied, rec.Code)))
	}

	// HEAD HTTTP request doesn't contain response body.
	if anonReq.Method != http.MethodHead {
		// read the response body.