alloc_conn_buf
buf = alloc_conn_buf(con, buf_len);
buf = alloc_conn_buf(con, head_onwire_len(ctrl_len, false));
buf = alloc_conn_buf(con, head_onwire_len(ctrl_len, false));
authorizer_copy = alloc_conn_buf(con, authorizer_len);
buf = alloc_conn_buf(con, head_onwire_len(ctrl_len, false));
buf = alloc_conn_buf(con, head_onwire_len(SHA256_DIGEST_SIZE,
buf = alloc_conn_buf(con, head_onwire_len(ctrl_len, con_secure(con)));
buf = alloc_conn_buf(con, head_onwire_len(ctrl_len, con_secure(con)));
buf = alloc_conn_buf(con, CEPH_BANNER_V2_PREFIX_LEN);
buf = alloc_conn_buf(con, payload_len);
buf = alloc_conn_buf(con, head_len);
buf = alloc_conn_buf(con, ctrl_len);
buf = alloc_conn_buf(con, ctrl_len);
buf = alloc_conn_buf(con, ctrl_len);