sys.purgeExpiredCredentialsForLDAP(ctx)
					sys.updateGroupMembershipsForLDAP(ctx)
				}
				if sys.OpenIDConfig.ProviderEnabled() {
					sys.purgeExpiredCredentialsForExternalSSO(ctx)
				}
			}

			timer.Reset(waitInterval())
		case <-ctx.Done():
			return
		}
	}
}

func (sys *IAMSys) validateAndAddRolePolicyMappings(ctx context.Context, m map[arn.ARN]string) {

	}
	return false
}

func readAllXL(ctx context.Context, disks []StorageAPI, bucket, object string, readData, inclFreeVers bool) ([]FileInfo, []error) {
	rawFileInfos, errs := readAllRawFileInfo(ctx, disks, bucket, object, readData)
	return pickLatestQuorumFilesInfo(ctx, rawFileInfos, errs, bucket, object, readData, inclFreeVers)
}

type WarmBackend interface {
	Put(ctx context.Context, object string, r io.Reader, length int64) (remoteVersionID, error)
	PutWithMeta(ctx context.Context, object string, r io.Reader, length int64, meta map[string]string) (remoteVersionID, error)
	Get(ctx context.Context, object string, rv remoteVersionID, opts WarmBackendGetOpts) (io.ReadCloser, error)
	Remove(ctx context.Context, object string, rv remoteVersionID) error

	return remoteVersionID(res.VersionID), s3.ToObjectError(err, object)
}

func (s3 *warmBackendS3) Put(ctx context.Context, object string, r io.Reader, length int64) (remoteVersionID, error) {
	return s3.PutWithMeta(ctx, object, r, length, map[string]string{})
}

func (s3 *warmBackendS3) Get(ctx context.Context, object string, rv remoteVersionID, opts WarmBackendGetOpts) (io.ReadCloser, error) {
	gopts := minio.GetObjectOptions{}

	if rv != "" {

// FIXME: add support for remote version ID in GCS remote tier and remove this.
// Currently it's a no-op.
func (gcs *warmBackendGCS) Put(ctx context.Context, key string, data io.Reader, length int64) (remoteVersionID, error) {
	return gcs.PutWithMeta(ctx, key, data, length, map[string]string{})
}

func (gcs *warmBackendGCS) Get(ctx context.Context, key string, rv remoteVersionID, opts WarmBackendGetOpts) (r io.ReadCloser, err error) {

		vid = *resp.VersionID
	}
	return remoteVersionID(vid), nil
}

func (az *warmBackendAzure) Put(ctx context.Context, object string, r io.Reader, length int64) (remoteVersionID, error) {
	return az.PutWithMeta(ctx, object, r, length, map[string]string{})
}

func (az *warmBackendAzure) Get(ctx context.Context, object string, rv remoteVersionID, opts WarmBackendGetOpts) (r io.ReadCloser, err error) {
	if opts.startOffset < 0 {

// pickValidFileInfo - picks one valid FileInfo content and returns from a
// slice of FileInfo.
func pickValidFileInfo(ctx context.Context, metaArr []FileInfo, modTime time.Time, etag string, quorum int) (FileInfo, error) {
	return findFileInfoInQuorum(ctx, metaArr, modTime, etag, quorum)
}

		return minPartSize, nil
	}
	return partSize, nil
}

func (m *warmBackendMinIO) PutWithMeta(ctx context.Context, object string, r io.Reader, length int64, meta map[string]string) (remoteVersionID, error) {
	partSize, err := optimalPartSize(length)
	if err != nil {
		return remoteVersionID(""), err
	}
	res, err := m.client.PutObject(ctx, m.Bucket, m.getDest(object), r, length, minio.PutObjectOptions{
		StorageClass:         m.StorageClass,

	// 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,
		w.Header().Get(xhttp.AmzRequestID), w.Header().Get(xhttp.AmzRequestHostID))

			// parts. This is considered an outdated disk, since
			// it needs healing too.
			verifyResp, verifyErr = onlineDisk.VerifyFile(ctx, bucket, object, meta)
		default:
			verifyResp, verifyErr = onlineDisk.CheckParts(ctx, bucket, object, meta)
		}

		for p := range latestMeta.Parts {
			if verifyErr != nil {
				dataErrsByPart[p][i] = convPartErrToInt(verifyErr)
			} else {