r.mostRecentStats.Stats[bucket] = bs
	}
	r.mostRecentStats.Timestamp = UTCNow()
	r.mostRecentStatsMu.Unlock()
	return bs
}

// get the most current of in-memory replication stats  and data usage info from crawler.
func (r *ReplicationStats) getLatestReplicationStats(bucket string) (s BucketStats) {
	bucketStats := globalNotificationSys.GetClusterBucketStats(GlobalContext, bucket)

// can be disabled via the corresponding `s3HFlag`.
//
// CAUTION: for requests involving large req/resp bodies ensure to pass the
// `traceHdrsS3HFlag`, otherwise both headers and body will be traced, causing
// high memory usage!
func s3APIMiddleware(f http.HandlerFunc, flags ...s3HFlag) http.HandlerFunc {
	// Collect all flags with bitwise-OR and assign operator
	var handlerFlags s3HFlag
	for _, flag := range flags {
		handlerFlags |= flag

          "interval": "",
          "legendFormat": "Free [{{drive}}]",
          "refId": "C"
        }
      ],
      "title": "Drive Usage",
      "type": "timeseries"
    },
    {
      "datasource": {
        "type": "prometheus",
        "uid": "${DS_PROMETHEUS}"
      },
      "description": "",
      "fieldConfig": {

// ObjReaderFn is a function type that takes a reader and returns
// GetObjectReader and an error. Request headers are passed to provide
// encryption parameters. cleanupFns allow cleanup funcs to be
// registered for calling after usage of the reader.
type ObjReaderFn func(inputReader io.Reader, h http.Header, cleanupFns ...func()) (r *GetObjectReader, err error)

// NewGetObjectReader creates a new GetObjectReader. The cleanUpFns

// dataUsageCacheV2 contains a cache of data usage entries version 2.
type dataUsageCacheV2 struct {
	Info  dataUsageCacheInfo
	Cache map[string]dataUsageEntryV2
}

// dataUsageCacheV3 contains a cache of data usage entries version 3.
type dataUsageCacheV3 struct {
	Info  dataUsageCacheInfo
	Cache map[string]dataUsageEntryV3
}

// dataUsageCacheV4 contains a cache of data usage entries version 4.

		// 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
		for _, usage := range certificate.ExtKeyUsage {
			if usage == x509.ExtKeyUsageAny || usage == x509.ExtKeyUsageClientAuth {
				validKeyUsage = true
				break
			}
		}

	for i, info := range infos {
		// Check if one of the drives in the set is being healed.
		// this information is used by scanner to skip healing
		// this erasure set while it calculates the usage.
		if info.Error != "" || disks[i] == nil {
			continue
		}
		if info.Healing {
			healing++
			if inclHealing {
				healingDisks = append(healingDisks, disks[i])

			deleteMarkers = madmin.DeleteMarkers{Count: dataUsageInfo.DeleteMarkersTotalCount}
			usage = madmin.Usage{Size: dataUsageInfo.ObjectsTotalSize}
		} else {
			buckets = madmin.Buckets{Error: err.Error()}
			objects = madmin.Objects{Error: err.Error()}
			deleteMarkers = madmin.DeleteMarkers{Error: err.Error()}
			usage = madmin.Usage{Error: err.Error()}
		}

		// Fetching the backend information

	//   _Out_ LPDWORD lpTotalNumberOfClusters
	// );
	_, _, _ = GetDiskFreeSpace.Call(uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr(path))),
		uintptr(unsafe.Pointer(&lpSectorsPerCluster)),
		uintptr(unsafe.Pointer(&lpBytesPerSector)),
		uintptr(unsafe.Pointer(&lpNumberOfFreeClusters)),
		uintptr(unsafe.Pointer(&lpTotalNumberOfClusters)))

	info.Files = uint64(lpTotalNumberOfClusters)

	// Load latest rebalance status
	meta := &rebalanceMeta{}
	err = meta.load(ctx, z.serverPools[0])
	if err != nil {
		return r, err
	}

	// Compute disk usage percentage
	si := z.StorageInfo(ctx, true)
	diskStats := make([]struct {
		AvailableSpace uint64
		TotalSpace     uint64
	}, len(z.serverPools))
	for _, disk := range si.Disks {
		// Ignore invalid.