63 	struct westwood *w = inet_csk_ca(sk);  in tcp_westwood_init()  local
65 	w->bk = 0;  in tcp_westwood_init()
66 	w->bw_ns_est = 0;  in tcp_westwood_init()
67 	w->bw_est = 0;  in tcp_westwood_init()
68 	w->accounted = 0;  in tcp_westwood_init()
69 	w->cumul_ack = 0;  in tcp_westwood_init()
70 	w->reset_rtt_min = 1;  in tcp_westwood_init()
71 	w->rtt_min = w->rtt = TCP_WESTWOOD_INIT_RTT;  in tcp_westwood_init()
72 	w->rtt_win_sx = tcp_jiffies32;  in tcp_westwood_init()
73 	w->snd_una = tcp_sk(sk)->snd_una;  in tcp_westwood_init()
74 	w->first_ack = 1;  in tcp_westwood_init()
86 static void westwood_filter(struct westwood *w, u32 delta)  in westwood_filter()  argument
89 	if (w->bw_ns_est == 0 && w->bw_est == 0) {  in westwood_filter()
90 		w->bw_ns_est = w->bk / delta;  in westwood_filter()
91 		w->bw_est = w->bw_ns_est;  in westwood_filter()
93 		w->bw_ns_est = westwood_do_filter(w->bw_ns_est, w->bk / delta);  in westwood_filter()
94 		w->bw_est = westwood_do_filter(w->bw_est, w->bw_ns_est);  in westwood_filter()
106 	struct westwood *w = inet_csk_ca(sk);  in tcp_westwood_pkts_acked()  local
109 		w->rtt = usecs_to_jiffies(sample->rtt_us);  in tcp_westwood_pkts_acked()
119 	struct westwood *w = inet_csk_ca(sk);  in westwood_update_window()  local
120 	s32 delta = tcp_jiffies32 - w->rtt_win_sx;  in westwood_update_window()
122 	/* Initialize w->snd_una with the first acked sequence number in order  in westwood_update_window()
123 	 * to fix mismatch between tp->snd_una and w->snd_una for the first  in westwood_update_window()
126 	if (w->first_ack) {  in westwood_update_window()
127 		w->snd_una = tcp_sk(sk)->snd_una;  in westwood_update_window()
128 		w->first_ack = 0;  in westwood_update_window()
140 	if (w->rtt && delta > max_t(u32, w->rtt, TCP_WESTWOOD_RTT_MIN)) {  in westwood_update_window()
141 		westwood_filter(w, delta);  in westwood_update_window()
143 		w->bk = 0;  in westwood_update_window()
144 		w->rtt_win_sx = tcp_jiffies32;  in westwood_update_window()
148 static inline void update_rtt_min(struct westwood *w)  in update_rtt_min()  argument
150 	if (w->reset_rtt_min) {  in update_rtt_min()
151 		w->rtt_min = w->rtt;  in update_rtt_min()
152 		w->reset_rtt_min = 0;  in update_rtt_min()
154 		w->rtt_min = min(w->rtt, w->rtt_min);  in update_rtt_min()
166 	struct westwood *w = inet_csk_ca(sk);  in westwood_fast_bw()  local
170 	w->bk += tp->snd_una - w->snd_una;  in westwood_fast_bw()
171 	w->snd_una = tp->snd_una;  in westwood_fast_bw()
172 	update_rtt_min(w);  in westwood_fast_bw()
183 	struct westwood *w = inet_csk_ca(sk);  in westwood_acked_count()  local
185 	w->cumul_ack = tp->snd_una - w->snd_una;  in westwood_acked_count()
190 	if (!w->cumul_ack) {  in westwood_acked_count()
191 		w->accounted += tp->mss_cache;  in westwood_acked_count()
192 		w->cumul_ack = tp->mss_cache;  in westwood_acked_count()
195 	if (w->cumul_ack > tp->mss_cache) {  in westwood_acked_count()
197 		if (w->accounted >= w->cumul_ack) {  in westwood_acked_count()
198 			w->accounted -= w->cumul_ack;  in westwood_acked_count()
199 			w->cumul_ack = tp->mss_cache;  in westwood_acked_count()
201 			w->cumul_ack -= w->accounted;  in westwood_acked_count()
202 			w->accounted = 0;  in westwood_acked_count()
206 	w->snd_una = tp->snd_una;  in westwood_acked_count()
208 	return w->cumul_ack;  in westwood_acked_count()
220 	const struct westwood *w = inet_csk_ca(sk);  in tcp_westwood_bw_rttmin()  local
222 	return max_t(u32, (w->bw_est * w->rtt_min) / tp->mss_cache, 2);  in tcp_westwood_bw_rttmin()
228 		struct westwood *w = inet_csk_ca(sk);  in tcp_westwood_ack()  local
231 		w->bk += westwood_acked_count(sk);  in tcp_westwood_ack()
233 		update_rtt_min(w);  in tcp_westwood_ack()
243 	struct westwood *w = inet_csk_ca(sk);  in tcp_westwood_event()  local
253 		w->reset_rtt_min = 1;  in tcp_westwood_event()
267 	if (ext & (1 << (INET_DIAG_VEGASINFO - 1))) {  in tcp_westwood_info()
268 		info->vegas.tcpv_enabled = 1;  in tcp_westwood_info()