stats, err := readStat(statsFile)
	if err != nil {
		return IOStats{}, err
	}
	if len(stats) < 11 {
		return IOStats{}, fmt.Errorf("found invalid format while reading %v", statsFile)
	}
	// refer https://www.kernel.org/doc/Documentation/block/stat.txt
	iostats = IOStats{
		ReadIOs:      stats[0],
		ReadMerges:   stats[1],
		ReadSectors:  stats[2],
		ReadTicks:    stats[3],
		WriteIOs:     stats[4],

	switch flag & writeMode {
	case writeMode:
		defer updateOSMetrics(osMetricOpenFileW, name)(err)
	default:
		defer updateOSMetrics(osMetricOpenFileR, name)(err)
	}
	return os.OpenFile(name, flag, perm)
}

// Access captures time taken to call syscall.Access()
// on windows, plan9 and solaris syscall.Access uses
// os.Lstat()
func Access(name string) (err error) {
	defer updateOSMetrics(osMetricAccess, name)(err)

	if err != nil {
		return nil, err
	}
	defer done(&err)

	return p.storage.ListVols(ctx)
}

func (p *xlStorageDiskIDCheck) StatVol(ctx context.Context, volume string) (vol VolInfo, err error) {
	ctx, done, err := p.TrackDiskHealth(ctx, storageMetricStatVol, volume)
	if err != nil {
		return vol, err
	}
	defer done(&err)

	list.Lock()
	defer list.Unlock()

	for id := range targetIDSet {
		target, ok := list.targets[id]
		if ok {
			target.Close()
			delete(list.targets, id)
		}
	}
}

// Targets - list all targets
func (list *TargetList) Targets() []Target {
	if list == nil {
		return []Target{}
	}

	list.RLock()
	defer list.RUnlock()

	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()

	var objLayer ObjectLayer
	var disks []string
	var err error
	var opts ObjectOptions

	objLayer, disks, err = prepareErasure16(ctx)
	if err != nil {
		t.Fatal(err)
	}

	// cleaning up of temporary test directories
	defer objLayer.Shutdown(context.Background())
	defer removeRoots(disks)

func (sys *BucketTargetSys) isOffline(ep *url.URL) bool {
	sys.hMutex.RLock()
	defer sys.hMutex.RUnlock()
	if h, ok := sys.hc[ep.Host]; ok {
		return !h.Online
	}
	go sys.initHC(ep)
	return false
}

// markOffline sets endpoint to offline if network i/o timeout seen.
func (sys *BucketTargetSys) markOffline(ep *url.URL) {
	sys.hMutex.Lock()
	defer sys.hMutex.Unlock()
	if h, ok := sys.hc[ep.Host]; ok {
		h.Online = false

	"github.com/minio/pkg/v2/policy"
)

// KMSStatusHandler - GET /minio/kms/v1/status
func (a kmsAPIHandlers) KMSStatusHandler(w http.ResponseWriter, r *http.Request) {
	ctx := newContext(r, w, "KMSStatus")
	defer logger.AuditLog(ctx, w, r, mustGetClaimsFromToken(r))
	objectAPI, _ := validateAdminReq(ctx, w, r, policy.KMSStatusAction)
	if objectAPI == nil {
		return
	}

	if GlobalKMS == nil {

// GetCSPolicy - Get the Content security Policy
func (browseCfg *Config) GetCSPolicy() string {
	configLock.RLock()
	defer configLock.RUnlock()
	return browseCfg.CSPPolicy
}

// GetHSTSSeconds - Get the Content security Policy
func (browseCfg *Config) GetHSTSSeconds() int {
	configLock.RLock()
	defer configLock.RUnlock()
	return browseCfg.HSTSSeconds
}

	z.rebalMu.Lock()
	defer z.rebalMu.Unlock()

	r := z.rebalMeta
	if r == nil {
		return
	}

	r.PoolStats[poolIdx].update(bucket, fi)
}

const (
	rebalMetaName = "rebalance.bin"
	rebalMetaFmt  = 1
	rebalMetaVer  = 1
)

func (z *erasureServerPools) nextRebalBucket(poolIdx int) (string, bool) {
	z.rebalMu.RLock()
	defer z.rebalMu.RUnlock()

	r := z.rebalMeta

		}
	}
}

// Tests presigned v2 signature.
func TestDoesPresignedV2SignatureMatch(t *testing.T) {
	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()

	obj, fsDir, err := prepareFS(ctx)
	if err != nil {
		t.Fatal(err)
	}
	defer os.RemoveAll(fsDir)
	if err = newTestConfig(globalMinioDefaultRegion, obj); err != nil {
		t.Fatal(err)
	}

	now := UTCNow()

	var (