ceph_con_flag_test
bool ceph_con_flag_test(struct ceph_connection *con, unsigned long con_flag);
if (ceph_con_flag_test(con, CEPH_CON_F_LOSSYTX)) {
!ceph_con_flag_test(con, CEPH_CON_F_KEEPALIVE_PENDING)) {
WARN_ON(ceph_con_flag_test(con, CEPH_CON_F_WRITE_PENDING));
WARN_ON(ceph_con_flag_test(con, CEPH_CON_F_KEEPALIVE_PENDING));
if (ceph_con_flag_test(con, CEPH_CON_F_WRITE_PENDING)) {