// Locking operations on object.
	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.

	"sync"
	"sync/atomic"
)

// Inspired from Golang sync.Once but it is only marked
// initialized when the provided function returns nil.

// Init represents the structure.
type Init struct {
	done uint32
	m    sync.Mutex
}

// Do is similar to sync.Once.Do - makes one successful
// call to the function. ie, it invokes the function
// if it is not successful yet.
func (l *Init) Do(f func() error) error {

	_ = x[osMetricLast-18]
}

const _osMetric_name = "RemoveAllMkdirAllMkdirRenameOpenFileWOpenFileROpenFileWFdOpenFileRFdOpenOpenFileDirectIOLstatRemoveStatAccessCreateReadDirentFdatasyncSyncLast"

var _osMetric_index = [...]uint8{0, 9, 17, 22, 28, 37, 46, 57, 68, 72, 88, 93, 99, 103, 109, 115, 125, 134, 138, 142}

func (i osMetric) String() string {
	if i >= osMetric(len(_osMetric_index)-1) {
		return "osMetric(" + strconv.FormatInt(int64(i), 10) + ")"

	err = r.throttle.WaitN(r.ctx, tokens)
	if err != nil {
		return n, err
	}
	n, err = r.r.Read(buf[:need])
	if err != nil {
		r.lastErr = err
		return n, err
	}
	r.m.updateMeasurement(r.opts.BucketOptions, uint64(tokens))
	return n, err
}

// NewMonitoredReader returns reference to a monitored reader that throttles reads to configured bandwidth for the
// bucket.

	type (
		Furniture struct {
			gorm.Model
			OwnerID *uint
		}

		Owner struct {
			gorm.Model
			Furnitures []Furniture
			CompanyID  *uint
			Company    Company
		}

		Building struct {
			gorm.Model
			Name    string
			OwnerID *uint
			Owner   Owner
		}
	)

	DB.Migrator().DropTable(&Building{}, &Owner{}, &Furniture{})

	SQSARN       []string `json:"sqsARN"`
}

// serverConnStats holds transferred bytes from/to the server
type serverConnStats struct {
	internodeInputBytes  uint64
	internodeOutputBytes uint64
	s3InputBytes         uint64
	s3OutputBytes        uint64
}

// ServerHTTPAPIStats holds total number of HTTP operations from/to the server,
// including the average duration the call was spent.
type ServerHTTPAPIStats struct {

var _scannerMetric_index = [...]uint8{0, 12, 24, 33, 41, 53, 65, 74, 77, 93, 98, 112, 127, 147, 157, 167, 186, 198, 208, 217, 232, 245, 249}

func (i scannerMetric) String() string {
	if i >= scannerMetric(len(_scannerMetric_index)-1) {

	Size    int64     `json:"size"`    // Size of the object `xl.meta`.
	ModTime time.Time `json:"modTime"` // ModTime of the object `xl.meta`.
	Name    string    `json:"name"`
	Dir     bool      `json:"dir"`
	Mode    uint32    `json:"mode"`
}

// ErasureInfo holds erasure coding and bitrot related information.
type ErasureInfo struct {
	// Algorithm is the string representation of erasure-coding-algorithm
	Algorithm string `json:"algorithm"`

	return dataUsageInfo, nil
}

func (s *xlStorage) getDeleteAttribute() uint64 {
	attr := "user.total_deletes"
	buf, err := xattr.LGet(s.formatFile, attr)
	if err != nil {
		// We start off with '0' if we can read the attributes
		return 0
	}
	return binary.LittleEndian.Uint64(buf[:8])
}

func (s *xlStorage) getWriteAttribute() uint64 {
	attr := "user.total_writes"
	buf, err := xattr.LGet(s.formatFile, attr)

	st, err := os.Stat(path.Join(tmpPath, testCase.volName))
	if err != nil {
		t.Fatalf("Stat failed with %s expected to pass.", err)
	}

	// Get umask of the bits stored.
	currentUmask := 0o777 - uint32(st.Mode().Perm())

	// Verify if umask is correct.
	if int(currentUmask) != testCase.expectedUmask {
		t.Fatalf("Umask check failed expected %d, got %d", testCase.expectedUmask, currentUmask)
	}
}