123 	u16	extra_acked[2];		/* max excess data ACKed in epoch */
124 	u32	ack_epoch_acked:20,	/* packets (S)ACKed in sampling epoch */
230 /* Return maximum extra acked in past k-2k round trips,
368 	 * ACKed so far. In this case, an RTO can cut cwnd to 1, in which  in bbr_bdp()
472  * follow the packet conservation principle: send P packets per P packets acked.
473  * After that, we slow-start and send at most 2*P packets per P packets acked.
480 	struct sock *sk, const struct rate_sample *rs, u32 acked, u32 *new_cwnd)  in bbr_set_cwnd_to_recover_or_restore()  argument
499 		cwnd = tcp_packets_in_flight(tp) + acked;  in bbr_set_cwnd_to_recover_or_restore()
508 		*new_cwnd = max(cwnd, tcp_packets_in_flight(tp) + acked);  in bbr_set_cwnd_to_recover_or_restore()
519 			 u32 acked, u32 bw, int gain)  in bbr_set_cwnd()  argument
525 	if (!acked)  in bbr_set_cwnd()
526 		goto done;  /* no packet fully ACKed; just apply caps */  in bbr_set_cwnd()
528 	if (bbr_set_cwnd_to_recover_or_restore(sk, rs, acked, &cwnd))  in bbr_set_cwnd()
533 	/* Increment the cwnd to account for excess ACKed data that seems  in bbr_set_cwnd()
541 		cwnd = min(cwnd + acked, target_cwnd);  in bbr_set_cwnd()
543 		cwnd = cwnd + acked;  in bbr_set_cwnd()
807  * Degree of ack aggregation is estimated as extra data acked beyond expected.
809  * max_extra_acked = "maximum recent excess data ACKed beyond max_bw * interval"