59 	struct illinois *ca = inet_csk_ca(sk);  in rtt_reset()  local
61 	ca->end_seq = tp->snd_nxt;  in rtt_reset()
62 	ca->cnt_rtt = 0;  in rtt_reset()
63 	ca->sum_rtt = 0;  in rtt_reset()
70 	struct illinois *ca = inet_csk_ca(sk);  in tcp_illinois_init()  local
72 	ca->alpha = ALPHA_MAX;  in tcp_illinois_init()
73 	ca->beta = BETA_BASE;  in tcp_illinois_init()
74 	ca->base_rtt = 0x7fffffff;  in tcp_illinois_init()
75 	ca->max_rtt = 0;  in tcp_illinois_init()
77 	ca->acked = 0;  in tcp_illinois_init()
78 	ca->rtt_low = 0;  in tcp_illinois_init()
79 	ca->rtt_above = 0;  in tcp_illinois_init()
87 	struct illinois *ca = inet_csk_ca(sk);  in tcp_illinois_acked()  local
89 	ca->acked = pkts_acked;  in tcp_illinois_acked()
100 	if (ca->base_rtt > rtt)  in tcp_illinois_acked()
101 		ca->base_rtt = rtt;  in tcp_illinois_acked()
104 	if (ca->max_rtt < rtt)  in tcp_illinois_acked()
105 		ca->max_rtt = rtt;  in tcp_illinois_acked()
107 	++ca->cnt_rtt;  in tcp_illinois_acked()
108 	ca->sum_rtt += rtt;  in tcp_illinois_acked()
112 static inline u32 max_delay(const struct illinois *ca)  in max_delay()  argument
114 	return ca->max_rtt - ca->base_rtt;  in max_delay()
118 static inline u32 avg_delay(const struct illinois *ca)  in avg_delay()  argument
120 	u64 t = ca->sum_rtt;  in avg_delay()
122 	do_div(t, ca->cnt_rtt);  in avg_delay()
123 	return t - ca->base_rtt;  in avg_delay()
138 static u32 alpha(struct illinois *ca, u32 da, u32 dm)  in alpha()  argument
144 		if (!ca->rtt_above)  in alpha()
150 		if (++ca->rtt_low < theta)  in alpha()
151 			return ca->alpha;  in alpha()
153 		ca->rtt_low = 0;  in alpha()
154 		ca->rtt_above = 0;  in alpha()
158 	ca->rtt_above = 1;  in alpha()
223 	struct illinois *ca = inet_csk_ca(sk);  in update_params()  local
226 		ca->alpha = ALPHA_BASE;  in update_params()
227 		ca->beta = BETA_BASE;  in update_params()
228 	} else if (ca->cnt_rtt > 0) {  in update_params()
229 		u32 dm = max_delay(ca);  in update_params()
230 		u32 da = avg_delay(ca);  in update_params()
232 		ca->alpha = alpha(ca, da, dm);  in update_params()
233 		ca->beta = beta(da, dm);  in update_params()
244 	struct illinois *ca = inet_csk_ca(sk);  in tcp_illinois_state()  local
247 		ca->alpha = ALPHA_BASE;  in tcp_illinois_state()
248 		ca->beta = BETA_BASE;  in tcp_illinois_state()
249 		ca->rtt_low = 0;  in tcp_illinois_state()
250 		ca->rtt_above = 0;  in tcp_illinois_state()
261 	struct illinois *ca = inet_csk_ca(sk);  in tcp_illinois_cong_avoid()  local
263 	if (after(ack, ca->end_seq))  in tcp_illinois_cong_avoid()
278 		tp->snd_cwnd_cnt += ca->acked;  in tcp_illinois_cong_avoid()
279 		ca->acked = 1;  in tcp_illinois_cong_avoid()
284 		delta = (tp->snd_cwnd_cnt * ca->alpha) >> ALPHA_SHIFT;  in tcp_illinois_cong_avoid()
296 	struct illinois *ca = inet_csk_ca(sk);  in tcp_illinois_ssthresh()  local
299 	return max(tp->snd_cwnd - ((tp->snd_cwnd * ca->beta) >> BETA_SHIFT), 2U);  in tcp_illinois_ssthresh()
306 	const struct illinois *ca = inet_csk_ca(sk);  in tcp_illinois_info()  local
310 		info->vegas.tcpv_rttcnt = ca->cnt_rtt;  in tcp_illinois_info()
311 		info->vegas.tcpv_minrtt = ca->base_rtt;  in tcp_illinois_info()
315 			u64 t = ca->sum_rtt;  in tcp_illinois_info()