ceph_con_open
ceph_con_open(&s->s_con, CEPH_ENTITY_TYPE_MDS, mds,
ceph_con_open(&session->s_con,
extern void ceph_con_open(struct ceph_connection *con,
EXPORT_SYMBOL(ceph_con_open);
ceph_con_open(&monc->con, CEPH_ENTITY_TYPE_MON, monc->cur_mon,
ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr);
ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd,