include/linux/objagg.h

   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         void * (*delta_create)(void *priv, void *parent_obj, void *obj);
  12         void (*delta_destroy)(void *priv, void *delta_priv);
  13         void * (*root_create)(void *priv, void *obj, unsigned int root_id);
  14 #define OBJAGG_OBJ_ROOT_ID_INVALID UINT_MAX
  15         void (*root_destroy)(void *priv, void *root_priv);
  16 };
  17
  18 struct objagg;
  19 struct objagg_obj;
  20 struct objagg_hints;
  21
  22 const void *objagg_obj_root_priv(const struct objagg_obj *objagg_obj);
  23 const void *objagg_obj_delta_priv(const struct objagg_obj *objagg_obj);
  24 const void *objagg_obj_raw(const struct objagg_obj *objagg_obj);
  25
  26 struct objagg_obj *objagg_obj_get(struct objagg *objagg, void *obj);
  27 void objagg_obj_put(struct objagg *objagg, struct objagg_obj *objagg_obj);
  28 struct objagg *objagg_create(const struct objagg_ops *ops,
  29                              struct objagg_hints *hints, void *priv);
  30 void objagg_destroy(struct objagg *objagg);
  31
  32 struct objagg_obj_stats {
  33         unsigned int user_count;
  34         unsigned int delta_user_count; /* includes delta object users */
  35 };
  36
  37 struct objagg_obj_stats_info {
  38         struct objagg_obj_stats stats;
  39         struct objagg_obj *objagg_obj; /* associated object */
  40         bool is_root;
  41 };
  42
  43 struct objagg_stats {
  44         unsigned int root_count;
  45         unsigned int stats_info_count;
  46         struct objagg_obj_stats_info stats_info[];
  47 };
  48
  49 const struct objagg_stats *objagg_stats_get(struct objagg *objagg);
  50 void objagg_stats_put(const struct objagg_stats *objagg_stats);
  51
  52 enum objagg_opt_algo_type {
  53         OBJAGG_OPT_ALGO_SIMPLE_GREEDY,
  54 };
  55
  56 struct objagg_hints *objagg_hints_get(struct objagg *objagg,
  57                                       enum objagg_opt_algo_type opt_algo_type);
  58 void objagg_hints_put(struct objagg_hints *objagg_hints);
  59 const struct objagg_stats *
  60 objagg_hints_stats_get(struct objagg_hints *objagg_hints);
  61
  62 #endif