net/dccp/ccids/lib/loss_interval.h

   1 #ifndef _DCCP_LI_HIST_
   2 #define _DCCP_LI_HIST_
   3 /*
   4  *  net/dccp/ccids/lib/loss_interval.h
   5  *
   6  *  Copyright (c) 2005-7 The University of Waikato, Hamilton, New Zealand.
   7  *  Copyright (c) 2005-7 Ian McDonald <ian.mcdonald@jandi.co.nz>
   8  *  Copyright (c) 2005 Arnaldo Carvalho de Melo <acme@conectiva.com.br>
   9  *
  10  *  This program is free software; you can redistribute it and/or modify it
  11  *  under the terms of the GNU General Public License as published by the Free
  12  *  Software Foundation; either version 2 of the License, or (at your option)
  13  *  any later version.
  14  */
  15
  16 #include <linux/list.h>
  17 #include <linux/slab.h>
  18 #include <linux/time.h>
  19
  20 #define DCCP_LI_HIST_IVAL_F_LENGTH  8
  21
  22 struct dccp_li_hist {
  23         struct kmem_cache *dccplih_slab;
  24 };
  25
  26 extern struct dccp_li_hist *dccp_li_hist_new(const char *name);
  27 extern void dccp_li_hist_delete(struct dccp_li_hist *hist);
  28
  29 struct dccp_li_hist_entry {
  30         struct list_head dccplih_node;
  31         u64              dccplih_seqno:48,
  32                          dccplih_win_count:4;
  33         u32              dccplih_interval;
  34 };
  35
  36 extern void dccp_li_hist_purge(struct dccp_li_hist *hist,
  37                                struct list_head *list);
  38
  39 extern u32 dccp_li_hist_calc_i_mean(struct list_head *list);
  40
  41 extern void dccp_li_update_li(struct sock *sk, struct dccp_li_hist *li_hist,
  42                               struct list_head *li_hist_list,
  43                               struct list_head *hist_list,
  44                               struct timeval *last_feedback, u16 s,
  45                               u32 bytes_recv, u32 previous_x_recv,
  46                               u64 seq_loss, u8 win_loss);
  47 #endif /* _DCCP_LI_HIST_ */