const ( // algorithms used to derive and encrypt DEKs
	algorithmAESGCM           = "AES-256-GCM-HMAC-SHA-256"
	algorithmChaCha20Poly1305 = "ChaCha20Poly1305"
)

func (kms secretKey) Stat(context.Context) (Status, error) {
	return Status{
		Name:       "SecretKey",
		DefaultKey: kms.keyID,
	}, nil
}

// IsLocal returns true if the KMS is a local implementation
func (kms secretKey) IsLocal() bool {

	currentSendCalls int64
	// The number of total events per target
	totalEvents int64
	// The number of failed events per target
	failedEvents int64
}

func (list *TargetList) getStatsByTargetID(id TargetID) (stat targetStat) {
	list.statLock.RLock()
	defer list.statLock.RUnlock()

	return list.targetStats[id]
}

func (list *TargetList) incCurrentSendCalls(id TargetID) {
	list.statLock.Lock()

	f, err := Open(path, flag, perm)
	if err != nil {
		return nil, err
	}

	if err = lockFile(syscall.Handle(f.Fd()), lockType); err != nil {
		f.Close()
		return nil, err
	}

	st, err := os.Stat(path)
	if err != nil {
		f.Close()
		return nil, err
	}

	if st.IsDir() {
		f.Close()
		return nil, &os.PathError{
			Op:   "open",
			Path: path,
			Err:  syscall.EISDIR,
		}
	}

func (api objectAPIHandlers) SelectObjectContentHandler(w http.ResponseWriter, r *http.Request) {
	ctx := newContext(r, w, "SelectObject")

	defer logger.AuditLog(ctx, w, r, mustGetClaimsFromToken(r))

	// Fetch object stat info.
	objectAPI := api.ObjectAPI()
	if objectAPI == nil {
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrServerNotInitialized), r.URL)
		return
	}

	}
	volumes := strings.Split(r.Form.Get(storageRESTVolumes), ",")
	err := s.getStorage().MakeVolBulk(r.Context(), volumes...)
	if err != nil {
		s.writeErrorResponse(w, err)
	}
}

// StatVolHandler - stat a volume.
func (s *storageRESTServer) StatVolHandler(params *grid.MSS) (*VolInfo, *grid.RemoteErr) {
	if !s.checkID(params.Get(storageRESTDiskID)) {
		return nil, grid.NewRemoteErr(errDiskNotFound)
	}

	// If the connection is lost, state will switch to StateConnecting.
	StateConnected

	// StateConnectionError is the state once a connection attempt has been made, and it failed.
	// The connection will remain in this stat until the connection has been successfully re-established.
	StateConnectionError

	// StateShutdown is the state when the server has been shut down.
	// This will not be used under normal operation.
	StateShutdown

		if file.Mode().IsRegular() || file.Name() == "CAs" || strings.HasPrefix(file.Name(), "..") {
			continue
		}
		if file.Mode()&os.ModeSymlink == os.ModeSymlink {
			file, err = Stat(filepath.Join(root.Name(), file.Name()))
			if err != nil {
				// not accessible ignore
				continue
			}
			if !file.IsDir() {
				continue
			}
		}

		var (

	startTime := time.Now()
	bucket := ri.Bucket
	object := ri.Name

	// set defaults for replication action based on operation being performed - actual
	// replication action can only be determined after stat on remote. This default is
	// needed for updating replication metrics correctly when target is offline.
	rAction := replicateMetadata

	rinfo = replicatedTargetInfo{
		Size:                  ri.ActualSize,

)

func loadProcStatMetrics(ctx context.Context, stat procfs.ProcStat, m MetricValues) {
	if stat.CPUTime() > 0 {
		m.Set(processCPUTotalSeconds, float64(stat.CPUTime()))
	}

	if stat.ResidentMemory() > 0 {
		m.Set(processResidentMemoryBytes, float64(stat.ResidentMemory()))
	}

	if stat.VirtualMemory() > 0 {
		m.Set(processVirtualMemoryBytes, float64(stat.VirtualMemory()))
	}

	startTime, err := stat.StartTime()

	if err = disk.MakeVol(context.Background(), testCase.volName); err != nil {
		t.Fatalf("Creating a volume failed with %s expected to pass.", err)
	}

	// Stat to get permissions bits.
	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())