root/include/linux/objagg.h

INCLUDED FROM

   1 /* SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 */
   2 /* Copyright (c) 2018 Mellanox Technologies. All rights reserved */
   3 
   4 #ifndef _OBJAGG_H
   5 #define _OBJAGG_H
   6 
   7 struct objagg_ops {
   8         size_t obj_size;
   9         bool (*delta_check)(void *priv, const void *parent_obj,
  10                             const void *obj);
  11         int (*hints_obj_cmp)(const void *obj1, const void *obj2);
  12         void * (*delta_create)(void *priv, void *parent_obj, void *obj);
  13         void (*delta_destroy)(void *priv, void *delta_priv);
  14         void * (*root_create)(void *priv, void *obj, unsigned int root_id);
  15 #define OBJAGG_OBJ_ROOT_ID_INVALID UINT_MAX
  16         void (*root_destroy)(void *priv, void *root_priv);
  17 };
  18 
  19 struct objagg;
  20 struct objagg_obj;
  21 struct objagg_hints;
  22 
  23 const void *objagg_obj_root_priv(const struct objagg_obj *objagg_obj);
  24 const void *objagg_obj_delta_priv(const struct objagg_obj *objagg_obj);
  25 const void *objagg_obj_raw(const struct objagg_obj *objagg_obj);
  26 
  27 struct objagg_obj *objagg_obj_get(struct objagg *objagg, void *obj);
  28 void objagg_obj_put(struct objagg *objagg, struct objagg_obj *objagg_obj);
  29 struct objagg *objagg_create(const struct objagg_ops *ops,
  30                              struct objagg_hints *hints, void *priv);
  31 void objagg_destroy(struct objagg *objagg);
  32 
  33 struct objagg_obj_stats {
  34         unsigned int user_count;
  35         unsigned int delta_user_count; /* includes delta object users */
  36 };
  37 
  38 struct objagg_obj_stats_info {
  39         struct objagg_obj_stats stats;
  40         struct objagg_obj *objagg_obj; /* associated object */
  41         bool is_root;
  42 };
  43 
  44 struct objagg_stats {
  45         unsigned int root_count;
  46         unsigned int stats_info_count;
  47         struct objagg_obj_stats_info stats_info[];
  48 };
  49 
  50 const struct objagg_stats *objagg_stats_get(struct objagg *objagg);
  51 void objagg_stats_put(const struct objagg_stats *objagg_stats);
  52 
  53 enum objagg_opt_algo_type {
  54         OBJAGG_OPT_ALGO_SIMPLE_GREEDY,
  55 };
  56 
  57 struct objagg_hints *objagg_hints_get(struct objagg *objagg,
  58                                       enum objagg_opt_algo_type opt_algo_type);
  59 void objagg_hints_put(struct objagg_hints *objagg_hints);
  60 const struct objagg_stats *
  61 objagg_hints_stats_get(struct objagg_hints *objagg_hints);
  62 
  63 #endif