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lib: introduce initial implementation of object aggregation manager

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This lib tracks objects which could be of two types:
1) root object
2) nested object - with a "delta" which differentiates it from
                   the associated root object
The objects are tracked by a hashtable and reference-counted. User is
responsible of implementing callbacks to create/destroy root entity
related to each root object and callback to create/destroy nested object
delta.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jiri Pirko 2018-11-14 08:22:28 +00:00 • committed by David S. Miller
parent 7dc5a0eeea
commit 0a020d416d
8 changed files with 1633 additions and 0 deletions
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46
include/linux/objagg.h Normal file
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/* SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 */
/* Copyright (c) 2018 Mellanox Technologies. All rights reserved */
#ifndef _OBJAGG_H
#define _OBJAGG_H
struct objagg_ops {
size_t obj_size;
void * (*delta_create)(void *priv, void *parent_obj, void *obj);
void (*delta_destroy)(void *priv, void *delta_priv);
void * (*root_create)(void *priv, void *obj);
void (*root_destroy)(void *priv, void *root_priv);
};
struct objagg;
struct objagg_obj;
const void *objagg_obj_root_priv(const struct objagg_obj *objagg_obj);
const void *objagg_obj_delta_priv(const struct objagg_obj *objagg_obj);
const void *objagg_obj_raw(const struct objagg_obj *objagg_obj);
struct objagg_obj *objagg_obj_get(struct objagg *objagg, void *obj);
void objagg_obj_put(struct objagg *objagg, struct objagg_obj *objagg_obj);
struct objagg *objagg_create(const struct objagg_ops *ops, void *priv);
void objagg_destroy(struct objagg *objagg);
struct objagg_obj_stats {
unsigned int user_count;
unsigned int delta_user_count; /* includes delta object users */
};
struct objagg_obj_stats_info {
struct objagg_obj_stats stats;
struct objagg_obj *objagg_obj; /* associated object */
bool is_root;
};
struct objagg_stats {
unsigned int stats_info_count;
struct objagg_obj_stats_info stats_info[];
};
const struct objagg_stats *objagg_stats_get(struct objagg *objagg);
void objagg_stats_put(const struct objagg_stats *objagg_stats);
#endif