1 #ifndef _DCCP_LI_HIST_ 2 #define _DCCP_LI_HIST_ 3 /* 4 * net/dccp/ccids/lib/loss_interval.h 5 * 6 * Copyright (c) 2005 The University of Waikato, Hamilton, New Zealand. 7 * Copyright (c) 2005 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 static inline struct dccp_li_hist_entry * 37 dccp_li_hist_entry_new(struct dccp_li_hist *hist, 38 const gfp_t prio) 39 { 40 return kmem_cache_alloc(hist->dccplih_slab, prio); 41 } 42 43 static inline void dccp_li_hist_entry_delete(struct dccp_li_hist *hist, 44 struct dccp_li_hist_entry *entry) 45 { 46 if (entry != NULL) 47 kmem_cache_free(hist->dccplih_slab, entry); 48 } 49 50 extern void dccp_li_hist_purge(struct dccp_li_hist *hist, 51 struct list_head *list); 52 53 extern u32 dccp_li_hist_calc_i_mean(struct list_head *list); 54 55 extern int dccp_li_hist_interval_new(struct dccp_li_hist *hist, 56 struct list_head *list, const u64 seq_loss, const u8 win_loss); 57 #endif /* _DCCP_LI_HIST_ */ 58