76 static void dctcp_reset(const struct tcp_sock *tp, struct dctcp *ca)  in dctcp_reset()  argument
78 	ca->next_seq = tp->snd_nxt;  in dctcp_reset()
80 	ca->acked_bytes_ecn = 0;  in dctcp_reset()
81 	ca->acked_bytes_total = 0;  in dctcp_reset()
91 		struct dctcp *ca = inet_csk_ca(sk);  in dctcp_init()  local
93 		ca->prior_snd_una = tp->snd_una;  in dctcp_init()
94 		ca->prior_rcv_nxt = tp->rcv_nxt;  in dctcp_init()
96 		ca->dctcp_alpha = min(dctcp_alpha_on_init, DCTCP_MAX_ALPHA);  in dctcp_init()
98 		ca->loss_cwnd = 0;  in dctcp_init()
99 		ca->ce_state = 0;  in dctcp_init()
101 		dctcp_reset(tp, ca);  in dctcp_init()
114 	struct dctcp *ca = inet_csk_ca(sk);  in dctcp_ssthresh()  local
117 	ca->loss_cwnd = tp->snd_cwnd;  in dctcp_ssthresh()
118 	return max(tp->snd_cwnd - ((tp->snd_cwnd * ca->dctcp_alpha) >> 11U), 2U);  in dctcp_ssthresh()
129 	struct dctcp *ca = inet_csk_ca(sk);  in dctcp_ce_state_0_to_1()  local
132 	if (!ca->ce_state) {  in dctcp_ce_state_0_to_1()
138 			__tcp_send_ack(sk, ca->prior_rcv_nxt);  in dctcp_ce_state_0_to_1()
142 	ca->prior_rcv_nxt = tp->rcv_nxt;  in dctcp_ce_state_0_to_1()
143 	ca->ce_state = 1;  in dctcp_ce_state_0_to_1()
150 	struct dctcp *ca = inet_csk_ca(sk);  in dctcp_ce_state_1_to_0()  local
153 	if (ca->ce_state) {  in dctcp_ce_state_1_to_0()
159 			__tcp_send_ack(sk, ca->prior_rcv_nxt);  in dctcp_ce_state_1_to_0()
163 	ca->prior_rcv_nxt = tp->rcv_nxt;  in dctcp_ce_state_1_to_0()
164 	ca->ce_state = 0;  in dctcp_ce_state_1_to_0()
172 	struct dctcp *ca = inet_csk_ca(sk);  in dctcp_update_alpha()  local
173 	u32 acked_bytes = tp->snd_una - ca->prior_snd_una;  in dctcp_update_alpha()
181 		ca->acked_bytes_total += acked_bytes;  in dctcp_update_alpha()
182 		ca->prior_snd_una = tp->snd_una;  in dctcp_update_alpha()
185 			ca->acked_bytes_ecn += acked_bytes;  in dctcp_update_alpha()
189 	if (!before(tp->snd_una, ca->next_seq)) {  in dctcp_update_alpha()
190 		u64 bytes_ecn = ca->acked_bytes_ecn;  in dctcp_update_alpha()
191 		u32 alpha = ca->dctcp_alpha;  in dctcp_update_alpha()
201 			do_div(bytes_ecn, max(1U, ca->acked_bytes_total));  in dctcp_update_alpha()
209 		WRITE_ONCE(ca->dctcp_alpha, alpha);  in dctcp_update_alpha()
210 		dctcp_reset(tp, ca);  in dctcp_update_alpha()
217 		struct dctcp *ca = inet_csk_ca(sk);  in dctcp_state()  local
227 		ca->dctcp_alpha = DCTCP_MAX_ALPHA;  in dctcp_state()
249 	const struct dctcp *ca = inet_csk_ca(sk);  in dctcp_get_info()  local
259 			info->dctcp.dctcp_ce_state = (u16) ca->ce_state;  in dctcp_get_info()
260 			info->dctcp.dctcp_alpha = ca->dctcp_alpha;  in dctcp_get_info()
261 			info->dctcp.dctcp_ab_ecn = ca->acked_bytes_ecn;  in dctcp_get_info()
262 			info->dctcp.dctcp_ab_tot = ca->acked_bytes_total;  in dctcp_get_info()
273 	const struct dctcp *ca = inet_csk_ca(sk);  in dctcp_cwnd_undo()  local
275 	return max(tcp_sk(sk)->snd_cwnd, ca->loss_cwnd);  in dctcp_cwnd_undo()