static void pdu_send_proxy(struct pdu *pdu) { struct iscsi_daemon_send *ids; int error; assert(pdu->pdu_connection->conn_conf.isc_iser != 0); pdu_set_data_segment_length(pdu, pdu->pdu_data_len); ids = calloc(1, sizeof(*ids)); if (ids == NULL) log_err(1, "calloc"); ids->ids_session_id = pdu->pdu_connection->conn_session_id; ids->ids_bhs = pdu->pdu_bhs; ids->ids_data_segment_len = pdu->pdu_data_len; ids->ids_data_segment = pdu->pdu_data; error = ioctl(pdu->pdu_connection->conn_iscsi_fd, ISCSIDSEND, ids); if (error != 0) log_err(1, "ISCSIDSEND"); free(ids); }
static void pdu_send_proxy(struct pdu *pdu) { assert(proxy_mode); pdu_set_data_segment_length(pdu, pdu->pdu_data_len); kernel_send(pdu); }
void pdu_send(struct pdu *pdu) { struct connection *conn; ssize_t ret, total_len; size_t padding; uint32_t zero = 0; struct iovec iov[3]; int iovcnt; conn = pdu->pdu_connection; #ifdef ICL_KERNEL_PROXY if (conn->conn_conf.isc_iser != 0) return (pdu_send_proxy(pdu)); #endif assert(conn->conn_conf.isc_iser == 0); pdu_set_data_segment_length(pdu, pdu->pdu_data_len); iov[0].iov_base = pdu->pdu_bhs; iov[0].iov_len = sizeof(*pdu->pdu_bhs); total_len = iov[0].iov_len; iovcnt = 1; if (pdu->pdu_data_len > 0) { iov[1].iov_base = pdu->pdu_data; iov[1].iov_len = pdu->pdu_data_len; total_len += iov[1].iov_len; iovcnt = 2; padding = pdu_padding(pdu); if (padding > 0) { assert(padding < sizeof(zero)); iov[2].iov_base = &zero; iov[2].iov_len = padding; total_len += iov[2].iov_len; iovcnt = 3; } } ret = writev(conn->conn_socket, iov, iovcnt); if (ret < 0) { if (timed_out()) log_errx(1, "exiting due to timeout"); log_err(1, "writev"); } if (ret != total_len) log_errx(1, "short write"); }