func (c *Client) IsOnline() bool {
	return atomic.LoadInt32(&c.connected) == online
}

// LastConn returns when the disk was (re-)connected
func (c *Client) LastConn() time.Time {
	return time.Unix(0, atomic.LoadInt64(&c.lastConn))
}

// LastError returns previous error
func (c *Client) LastError() error {
	c.RLock()
	defer c.RUnlock()

func (client *storageRESTClient) IsOnlineWS() bool {
	return client.gridConn.State() == grid.StateConnected
}

// LastConn - returns when the disk is seen to be connected the last time
func (client *storageRESTClient) LastConn() time.Time {
	return client.restClient.LastConn()
}

func (client *storageRESTClient) IsLocal() bool {
	return false
}

func (client *storageRESTClient) Hostname() string {

}

// Stats returns the current connection stats.
func (c *Connection) Stats() madmin.RPCMetrics {
	conn := 0
	if c.State() == StateConnected {
		conn++
	}
	var lastConn time.Time
	if t := c.lastConnect.Load(); t != nil {
		lastConn = *t
	}
	pingMS := float64(c.lastPingDur.Load()) / float64(time.Millisecond)
	m := madmin.RPCMetrics{
		CollectedAt:      time.Now(),
		Connected:        conn,

		if cdisk != nil && cdisk.IsOnline() {
			if s.lastConnectDisksOpTime.IsZero() {
				continue
			}

			// An online-disk means its a valid disk but it may be a re-connected disk
			// we verify that here based on LastConn(), however we make sure to avoid
			// putting it back into the s.erasureDisks by re-placing the disk again.
			_, setIndex, _ := cdisk.GetDiskLoc()
			if setIndex != -1 {
				continue
			}
		}

	return s.endpoint
}

func (s *xlStorage) Close() error {
	s.immediatePurgeCancel()
	return nil
}

func (s *xlStorage) IsOnline() bool {
	return true
}

func (s *xlStorage) LastConn() time.Time {
	return time.Time{}
}

func (s *xlStorage) IsLocal() bool {
	return true
}

// Retrieve location indexes.
func (s *xlStorage) GetDiskLoc() (poolIdx, setIdx, diskIdx int) {