62 	struct westwood *w = inet_csk_ca(sk);  in tcp_westwood_init()  local
64 	w->bk = 0;  in tcp_westwood_init()
65 	w->bw_ns_est = 0;  in tcp_westwood_init()
66 	w->bw_est = 0;  in tcp_westwood_init()
67 	w->accounted = 0;  in tcp_westwood_init()
68 	w->cumul_ack = 0;  in tcp_westwood_init()
69 	w->reset_rtt_min = 1;  in tcp_westwood_init()
70 	w->rtt_min = w->rtt = TCP_WESTWOOD_INIT_RTT;  in tcp_westwood_init()
71 	w->rtt_win_sx = tcp_time_stamp;  in tcp_westwood_init()
72 	w->snd_una = tcp_sk(sk)->snd_una;  in tcp_westwood_init()
73 	w->first_ack = 1;  in tcp_westwood_init()
85 static void westwood_filter(struct westwood *w, u32 delta)  in westwood_filter()  argument
88 	if (w->bw_ns_est == 0 && w->bw_est == 0) {  in westwood_filter()
89 		w->bw_ns_est = w->bk / delta;  in westwood_filter()
90 		w->bw_est = w->bw_ns_est;  in westwood_filter()
92 		w->bw_ns_est = westwood_do_filter(w->bw_ns_est, w->bk / delta);  in westwood_filter()
93 		w->bw_est = westwood_do_filter(w->bw_est, w->bw_ns_est);  in westwood_filter()
104 	struct westwood *w = inet_csk_ca(sk);  in tcp_westwood_pkts_acked()  local
107 		w->rtt = usecs_to_jiffies(rtt);  in tcp_westwood_pkts_acked()
117 	struct westwood *w = inet_csk_ca(sk);  in westwood_update_window()  local
118 	s32 delta = tcp_time_stamp - w->rtt_win_sx;  in westwood_update_window()
124 	if (w->first_ack) {  in westwood_update_window()
125 		w->snd_una = tcp_sk(sk)->snd_una;  in westwood_update_window()
126 		w->first_ack = 0;  in westwood_update_window()
138 	if (w->rtt && delta > max_t(u32, w->rtt, TCP_WESTWOOD_RTT_MIN)) {  in westwood_update_window()
139 		westwood_filter(w, delta);  in westwood_update_window()
141 		w->bk = 0;  in westwood_update_window()
142 		w->rtt_win_sx = tcp_time_stamp;  in westwood_update_window()
146 static inline void update_rtt_min(struct westwood *w)  in update_rtt_min()  argument
148 	if (w->reset_rtt_min) {  in update_rtt_min()
149 		w->rtt_min = w->rtt;  in update_rtt_min()
150 		w->reset_rtt_min = 0;  in update_rtt_min()
152 		w->rtt_min = min(w->rtt, w->rtt_min);  in update_rtt_min()
164 	struct westwood *w = inet_csk_ca(sk);  in westwood_fast_bw()  local
168 	w->bk += tp->snd_una - w->snd_una;  in westwood_fast_bw()
169 	w->snd_una = tp->snd_una;  in westwood_fast_bw()
170 	update_rtt_min(w);  in westwood_fast_bw()
181 	struct westwood *w = inet_csk_ca(sk);  in westwood_acked_count()  local
183 	w->cumul_ack = tp->snd_una - w->snd_una;  in westwood_acked_count()
188 	if (!w->cumul_ack) {  in westwood_acked_count()
189 		w->accounted += tp->mss_cache;  in westwood_acked_count()
190 		w->cumul_ack = tp->mss_cache;  in westwood_acked_count()
193 	if (w->cumul_ack > tp->mss_cache) {  in westwood_acked_count()
195 		if (w->accounted >= w->cumul_ack) {  in westwood_acked_count()
196 			w->accounted -= w->cumul_ack;  in westwood_acked_count()
197 			w->cumul_ack = tp->mss_cache;  in westwood_acked_count()
199 			w->cumul_ack -= w->accounted;  in westwood_acked_count()
200 			w->accounted = 0;  in westwood_acked_count()
204 	w->snd_una = tp->snd_una;  in westwood_acked_count()
206 	return w->cumul_ack;  in westwood_acked_count()
218 	const struct westwood *w = inet_csk_ca(sk);  in tcp_westwood_bw_rttmin()  local
220 	return max_t(u32, (w->bw_est * w->rtt_min) / tp->mss_cache, 2);  in tcp_westwood_bw_rttmin()
226 		struct westwood *w = inet_csk_ca(sk);  in tcp_westwood_ack()  local
229 		w->bk += westwood_acked_count(sk);  in tcp_westwood_ack()
231 		update_rtt_min(w);  in tcp_westwood_ack()
241 	struct westwood *w = inet_csk_ca(sk);  in tcp_westwood_event()  local
250 		w->reset_rtt_min = 1;  in tcp_westwood_event()