#ifndef _DCCP_LI_HIST_
#define _DCCP_LI_HIST_
/*
 *  Copyright (c) 2007   The University of Aberdeen, Scotland, UK
 *  Copyright (c) 2005-7 The University of Waikato, Hamilton, New Zealand.
 *  Copyright (c) 2005-7 Ian McDonald <ian.mcdonald@jandi.co.nz>
 *  Copyright (c) 2005 Arnaldo Carvalho de Melo <acme@conectiva.com.br>
 *
 *  This program is free software; you can redistribute it and/or modify it
 *  under the terms of the GNU General Public License as published by the Free
 *  Software Foundation; either version 2 of the License, or (at your option)
 *  any later version.
 */
#include <linux/ktime.h>
#include <linux/list.h>
#include <linux/slab.h>

/*
 * Number of loss intervals (RFC 4342, 8.6.1). The history size is one more than
 * NINTERVAL, since the `open' interval I_0 is always stored as the first entry.
 */
#define NINTERVAL	8
#define LIH_SIZE	(NINTERVAL + 1)

/**
 *  tfrc_loss_interval  -  Loss history record for TFRC-based protocols
 *  @li_seqno:		Highest received seqno before the start of loss
 *  @li_ccval:		The CCVal belonging to @li_seqno
 *  @li_is_closed:	Whether @li_seqno is older than 1 RTT
 *  @li_length:		Loss interval sequence length
 */
struct tfrc_loss_interval {
	u64		 li_seqno:48,
			 li_ccval:4,
			 li_is_closed:1;
	u32		 li_length;
};

/**
 *  tfrc_loss_hist  -  Loss record database
 *  @ring:	Circular queue managed in LIFO manner
 *  @counter:	Current count of entries (can be more than %LIH_SIZE)
 *  @i_mean:	Current Average Loss Interval [RFC 3448, 5.4]
 */
struct tfrc_loss_hist {
	struct tfrc_loss_interval	*ring[LIH_SIZE];
	u8				counter;
	u32				i_mean;
};

static inline void tfrc_lh_init(struct tfrc_loss_hist *lh)
{
	memset(lh, 0, sizeof(struct tfrc_loss_hist));
}

static inline u8 tfrc_lh_is_initialised(struct tfrc_loss_hist *lh)
{
	return lh->counter > 0;
}

static inline u8 tfrc_lh_length(struct tfrc_loss_hist *lh)
{
	return min(lh->counter, (u8)LIH_SIZE);
}

struct tfrc_rx_hist;

int tfrc_lh_interval_add(struct tfrc_loss_hist *, struct tfrc_rx_hist *,
			 u32 (*first_li)(struct sock *), struct sock *);
u8 tfrc_lh_update_i_mean(struct tfrc_loss_hist *lh, struct sk_buff *);
void tfrc_lh_cleanup(struct tfrc_loss_hist *lh);

#endif /* _DCCP_LI_HIST_ */
4fc0612c169e2e043d58b01&amp;id2=2851940ffee313e0ff12540a8e11a8c54dea9c65'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/include/net/irda/irlan_provider.h'>
<input type='hidden' name='id' value='52e01b84a244473074fc0612c169e2e043d58b01'/><input type='hidden' name='id2' value='2851940ffee313e0ff12540a8e11a8c54dea9c65'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/diff/?id=52e01b84a244473074fc0612c169e2e043d58b01&amp;id2=2851940ffee313e0ff12540a8e11a8c54dea9c65'>root</a>/<a href='/cgit.cgi/linux/net-next.git/diff/include?id=52e01b84a244473074fc0612c169e2e043d58b01&amp;id2=2851940ffee313e0ff12540a8e11a8c54dea9c65'>include</a>/<a href='/cgit.cgi/linux/net-next.git/diff/include/net?id=52e01b84a244473074fc0612c169e2e043d58b01&amp;id2=2851940ffee313e0ff12540a8e11a8c54dea9c65'>net</a>/<a href='/cgit.cgi/linux/net-next.git/diff/include/net/irda?id=52e01b84a244473074fc0612c169e2e043d58b01&amp;id2=2851940ffee313e0ff12540a8e11a8c54dea9c65'>irda</a>/<a href='/cgit.cgi/linux/net-next.git/diff/include/net/irda/irlan_provider.h?id=52e01b84a244473074fc0612c169e2e043d58b01&amp;id2=2851940ffee313e0ff12540a8e11a8c54dea9c65'>irlan_provider.h</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='52e01b84a244473074fc0612c169e2e043d58b01'/><input type='hidden' name='id2' value='2851940ffee313e0ff12540a8e11a8c54dea9c65'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=52e01b84a244473074fc0612c169e2e043d58b01&amp;id2=2851940ffee313e0ff12540a8e11a8c54dea9c65'>Diffstat</a> (limited to 'include/net/irda/irlan_provider.h')</div><table summary='diffstat' class='diffstat'>