CEPH_CON_F_BACKOFF
if (!ceph_con_flag_test_and_clear(con, CEPH_CON_F_BACKOFF))
ceph_con_flag_set(con, CEPH_CON_F_BACKOFF);
ceph_con_flag_set(con, CEPH_CON_F_BACKOFF);
ceph_con_flag_clear(con, CEPH_CON_F_BACKOFF);
case CEPH_CON_F_BACKOFF: