// Updates are sent on a regular basis and the caller *must* consume them.
func (er erasureObjects) nsScanner(ctx context.Context, buckets []BucketInfo, wantCycle uint32, updates chan<- dataUsageCache, healScanMode madmin.HealScanMode) error {
	if len(buckets) == 0 {
		return nil
	}

	// Collect disks we can use.
	disks, healing := er.getOnlineDisksWithHealing(false)
	if len(disks) == 0 {

	// Last sanity check
	if len(tracker.QueuedBuckets) > 0 {
		return fmt.Errorf("not all buckets were healed: %v", tracker.QueuedBuckets)
	}

	return nil
}

func healBucket(bucket string, scan madmin.HealScanMode) error {
	// Get background heal sequence to send elements to heal
	bgSeq, ok := globalBackgroundHealState.getHealSequenceByToken(bgHealingUUID)
	if ok {

				time.Second)
			time.Sleep(duration)
		}
	}()
}

func getCycleScanMode(currentCycle, bitrotStartCycle uint64, bitrotStartTime time.Time) madmin.HealScanMode {
	bitrotCycle := globalHealConfig.BitrotScanCycle()
	switch bitrotCycle {
	case -1:
		return madmin.HealNormalScan
	case 0:
		return madmin.HealDeepScan
	}

}

func (d *naughtyDisk) SetDiskID(id string) {
	d.disk.SetDiskID(id)
}

func (d *naughtyDisk) NSScanner(ctx context.Context, cache dataUsageCache, updates chan<- dataUsageEntry, scanMode madmin.HealScanMode, weSleep func() bool) (info dataUsageCache, err error) {
	if err := d.calcError(); err != nil {
		return info, err
	}
	return d.disk.NSScanner(ctx, cache, updates, scanMode, weSleep)
}

func checkObjectWithAllParts(ctx context.Context, onlineDisks []StorageAPI, partsMetadata []FileInfo,
	errs []error, latestMeta FileInfo, filterByETag bool, bucket, object string,
	scanMode madmin.HealScanMode,
) (dataErrsByDisk map[int][]int, dataErrsByPart map[int][]int) {
	dataErrsByDisk = make(map[int][]int, len(onlineDisks))
	for i := range onlineDisks {
		dataErrsByDisk[i] = make([]int, len(latestMeta.Parts))
	}

		t.Fatalf("Expected versions 1, got %d", fileInfoPreHeal.NumVersions)
	}

	if err = objLayer.HealObjects(ctx, bucket, "", madmin.HealOpts{Recursive: true, Remove: true},
		func(bucket, object, vid string, scanMode madmin.HealScanMode) error {
			_, err := objLayer.HealObject(ctx, bucket, object, vid, madmin.HealOpts{ScanMode: scanMode, Remove: true})
			return err
		}); err != nil {
		t.Fatal(err)
	}

		// meta are always upto date and correct.
		h.settings.Recursive = true
		return objAPI.HealObjects(h.ctx, minioMetaBucket, metaPrefix, h.settings, func(bucket, object, versionID string, scanMode madmin.HealScanMode) error {
			if h.isQuitting() {
				return errHealStopSignalled
			}

			err := h.queueHealTask(healSource{
				bucket:    bucket,
				object:    object,
				versionID: versionID,

)

// List a prefix or a single object versions and heal
func (er erasureObjects) listAndHeal(ctx context.Context, bucket, prefix string, recursive bool, scanMode madmin.HealScanMode, healEntry func(string, metaCacheEntry, madmin.HealScanMode) error) error {
	ctx, cancel := context.WithCancel(ctx)
	defer cancel()

	disks, _ := er.getOnlineDisksWithHealing(false)
	if len(disks) == 0 {

	NewNSLock(bucket string, objects ...string) RWLocker

	// Storage operations.
	Shutdown(context.Context) error
	NSScanner(ctx context.Context, updates chan<- DataUsageInfo, wantCycle uint32, scanMode madmin.HealScanMode) error
	BackendInfo() madmin.BackendInfo
	Legacy() bool // Only returns true for deployments which use CRCMOD as its object distribution algorithm.
	StorageInfo(ctx context.Context, metrics bool) StorageInfo

	// healing tracker is always for local disks.
	return nil
}

func (client *storageRESTClient) NSScanner(ctx context.Context, cache dataUsageCache, updates chan<- dataUsageEntry, scanMode madmin.HealScanMode, _ func() bool) (dataUsageCache, error) {
	defer xioutil.SafeClose(updates)

	st, err := storageNSScannerRPC.Call(ctx, client.gridConn, &nsScannerOptions{
		DiskID:   *client.diskID.Load(),
		ScanMode: int(scanMode),