METRIC_WRITE
wsize->total_ops = cpu_to_le64(m->metric[METRIC_WRITE].total);
wsize->total_size = cpu_to_le64(m->metric[METRIC_WRITE].size_sum);
sum = m->metric[METRIC_WRITE].latency_sum;
ktime_to_ceph_timespec(&write->avg, m->metric[METRIC_WRITE].latency_avg);
write->sq_sum = cpu_to_le64(m->metric[METRIC_WRITE].latency_sq_sum);
write->count = cpu_to_le64(m->metric[METRIC_WRITE].total);
ceph_update_metrics(&m->metric[METRIC_WRITE],