60 static inline void bictcp_reset(struct bictcp *ca)  in bictcp_reset()  argument
62 	ca->cnt = 0;  in bictcp_reset()
63 	ca->last_max_cwnd = 0;  in bictcp_reset()
64 	ca->last_cwnd = 0;  in bictcp_reset()
65 	ca->last_time = 0;  in bictcp_reset()
66 	ca->epoch_start = 0;  in bictcp_reset()
67 	ca->delayed_ack = 2 << ACK_RATIO_SHIFT;  in bictcp_reset()
72 	struct bictcp *ca = inet_csk_ca(sk);  in bictcp_init()  local
74 	bictcp_reset(ca);  in bictcp_init()
83 static inline void bictcp_update(struct bictcp *ca, u32 cwnd)  in bictcp_update()  argument
85 	if (ca->last_cwnd == cwnd &&  in bictcp_update()
86 	    (s32)(tcp_jiffies32 - ca->last_time) <= HZ / 32)  in bictcp_update()
89 	ca->last_cwnd = cwnd;  in bictcp_update()
90 	ca->last_time = tcp_jiffies32;  in bictcp_update()
92 	if (ca->epoch_start == 0) /* record the beginning of an epoch */  in bictcp_update()
93 		ca->epoch_start = tcp_jiffies32;  in bictcp_update()
97 		ca->cnt = cwnd;  in bictcp_update()
102 	if (cwnd < ca->last_max_cwnd) {  in bictcp_update()
103 		__u32	dist = (ca->last_max_cwnd - cwnd)  in bictcp_update()
108 			ca->cnt = cwnd / max_increment;  in bictcp_update()
111 			ca->cnt = (cwnd * smooth_part) / BICTCP_B;  in bictcp_update()
114 			ca->cnt = cwnd / dist;  in bictcp_update()
117 		if (cwnd < ca->last_max_cwnd + BICTCP_B)  in bictcp_update()
119 			ca->cnt = (cwnd * smooth_part) / BICTCP_B;  in bictcp_update()
120 		else if (cwnd < ca->last_max_cwnd + max_increment*(BICTCP_B-1))  in bictcp_update()
122 			ca->cnt = (cwnd * (BICTCP_B-1))  in bictcp_update()
123 				/ (cwnd - ca->last_max_cwnd);  in bictcp_update()
126 			ca->cnt = cwnd / max_increment;  in bictcp_update()
130 	if (ca->last_max_cwnd == 0) {  in bictcp_update()
131 		if (ca->cnt > 20) /* increase cwnd 5% per RTT */  in bictcp_update()
132 			ca->cnt = 20;  in bictcp_update()
135 	ca->cnt = (ca->cnt << ACK_RATIO_SHIFT) / ca->delayed_ack;  in bictcp_update()
136 	if (ca->cnt == 0)			/* cannot be zero */  in bictcp_update()
137 		ca->cnt = 1;  in bictcp_update()
143 	struct bictcp *ca = inet_csk_ca(sk);  in bictcp_cong_avoid()  local
153 	bictcp_update(ca, tcp_snd_cwnd(tp));  in bictcp_cong_avoid()
154 	tcp_cong_avoid_ai(tp, ca->cnt, acked);  in bictcp_cong_avoid()
164 	struct bictcp *ca = inet_csk_ca(sk);  in bictcp_recalc_ssthresh()  local
166 	ca->epoch_start = 0;	/* end of epoch */  in bictcp_recalc_ssthresh()
169 	if (tcp_snd_cwnd(tp) < ca->last_max_cwnd && fast_convergence)  in bictcp_recalc_ssthresh()
170 		ca->last_max_cwnd = (tcp_snd_cwnd(tp) * (BICTCP_BETA_SCALE + beta))  in bictcp_recalc_ssthresh()
173 		ca->last_max_cwnd = tcp_snd_cwnd(tp);  in bictcp_recalc_ssthresh()
195 		struct bictcp *ca = inet_csk_ca(sk);  in bictcp_acked()  local
197 		ca->delayed_ack += sample->pkts_acked -  in bictcp_acked()
198 			(ca->delayed_ack >> ACK_RATIO_SHIFT);  in bictcp_acked()