26 static inline struct tfrc_loss_interval *tfrc_lh_peek(struct tfrc_loss_hist *lh)  in tfrc_lh_peek()  argument
28 	return lh->counter ? lh->ring[LIH_INDEX(lh->counter - 1)] : NULL;  in tfrc_lh_peek()
32 static inline u32 tfrc_lh_get_interval(struct tfrc_loss_hist *lh, const u8 i)  in tfrc_lh_get_interval()  argument
34 	BUG_ON(i >= lh->counter);  in tfrc_lh_get_interval()
35 	return lh->ring[LIH_INDEX(lh->counter - i - 1)]->li_length;  in tfrc_lh_get_interval()
41 static struct tfrc_loss_interval *tfrc_lh_demand_next(struct tfrc_loss_hist *lh)  in tfrc_lh_demand_next()  argument
43 	if (lh->ring[LIH_INDEX(lh->counter)] == NULL)  in tfrc_lh_demand_next()
44 		lh->ring[LIH_INDEX(lh->counter)] = kmem_cache_alloc(tfrc_lh_slab,  in tfrc_lh_demand_next()
46 	return lh->ring[LIH_INDEX(lh->counter)];  in tfrc_lh_demand_next()
49 void tfrc_lh_cleanup(struct tfrc_loss_hist *lh)  in tfrc_lh_cleanup()  argument
51 	if (!tfrc_lh_is_initialised(lh))  in tfrc_lh_cleanup()
54 	for (lh->counter = 0; lh->counter < LIH_SIZE; lh->counter++)  in tfrc_lh_cleanup()
55 		if (lh->ring[LIH_INDEX(lh->counter)] != NULL) {  in tfrc_lh_cleanup()
57 					lh->ring[LIH_INDEX(lh->counter)]);  in tfrc_lh_cleanup()
58 			lh->ring[LIH_INDEX(lh->counter)] = NULL;  in tfrc_lh_cleanup()
62 static void tfrc_lh_calc_i_mean(struct tfrc_loss_hist *lh)  in tfrc_lh_calc_i_mean()  argument
65 	int i, k = tfrc_lh_length(lh) - 1; /* k is as in rfc3448bis, 5.4 */  in tfrc_lh_calc_i_mean()
71 		i_i = tfrc_lh_get_interval(lh, i);  in tfrc_lh_calc_i_mean()
81 	lh->i_mean = max(i_tot0, i_tot1) / w_tot;  in tfrc_lh_calc_i_mean()
88 u8 tfrc_lh_update_i_mean(struct tfrc_loss_hist *lh, struct sk_buff *skb)  in tfrc_lh_update_i_mean()  argument
90 	struct tfrc_loss_interval *cur = tfrc_lh_peek(lh);  in tfrc_lh_update_i_mean()
91 	u32 old_i_mean = lh->i_mean;  in tfrc_lh_update_i_mean()
113 	if (tfrc_lh_length(lh) == 1)		/* due to RFC 3448, 6.3.1 */  in tfrc_lh_update_i_mean()
117 	tfrc_lh_calc_i_mean(lh);  in tfrc_lh_update_i_mean()
119 	return lh->i_mean < old_i_mean;  in tfrc_lh_update_i_mean()
139 int tfrc_lh_interval_add(struct tfrc_loss_hist *lh, struct tfrc_rx_hist *rh,  in tfrc_lh_interval_add()  argument
142 	struct tfrc_loss_interval *cur = tfrc_lh_peek(lh), *new;  in tfrc_lh_interval_add()
147 	new = tfrc_lh_demand_next(lh);  in tfrc_lh_interval_add()
157 	if (++lh->counter == 1)  in tfrc_lh_interval_add()
158 		lh->i_mean = new->li_length = (*calc_first_li)(sk);  in tfrc_lh_interval_add()
163 		if (lh->counter > (2*LIH_SIZE))  in tfrc_lh_interval_add()
164 			lh->counter -= LIH_SIZE;  in tfrc_lh_interval_add()
166 		tfrc_lh_calc_i_mean(lh);  in tfrc_lh_interval_add()