[linux-block.git] / include / linux / bpf_mem_alloc.h

/* SPDX-License-Identifier: GPL-2.0-only */
/* Copyright (c) 2022 Meta Platforms, Inc. and affiliates. */
#ifndef _BPF_MEM_ALLOC_H
#define _BPF_MEM_ALLOC_H
#include <linux/compiler_types.h>
#include <linux/workqueue.h>

struct bpf_mem_cache;
struct bpf_mem_caches;

struct bpf_mem_alloc {
	struct bpf_mem_caches __percpu *caches;
	struct bpf_mem_cache __percpu *cache;
	struct work_struct work;
};

/* 'size != 0' is for bpf_mem_alloc which manages fixed-size objects.
 * Alloc and free are done with bpf_mem_cache_{alloc,free}().
 *
 * 'size = 0' is for bpf_mem_alloc which manages many fixed-size objects.
 * Alloc and free are done with bpf_mem_{alloc,free}() and the size of
 * the returned object is given by the size argument of bpf_mem_alloc().
 */
int bpf_mem_alloc_init(struct bpf_mem_alloc *ma, int size, bool percpu);
void bpf_mem_alloc_destroy(struct bpf_mem_alloc *ma);

/* kmalloc/kfree equivalent: */
void *bpf_mem_alloc(struct bpf_mem_alloc *ma, size_t size);
void bpf_mem_free(struct bpf_mem_alloc *ma, void *ptr);

/* kmem_cache_alloc/free equivalent: */
void *bpf_mem_cache_alloc(struct bpf_mem_alloc *ma);
void bpf_mem_cache_free(struct bpf_mem_alloc *ma, void *ptr);
void bpf_mem_cache_raw_free(void *ptr);
void *bpf_mem_cache_alloc_flags(struct bpf_mem_alloc *ma, gfp_t flags);

#endif /* _BPF_MEM_ALLOC_H */
Commit	Line	Data
7c8199e2 AS	1	/* SPDX-License-Identifier: GPL-2.0-only */
	2	/* Copyright (c) 2022 Meta Platforms, Inc. and affiliates. */
	3	#ifndef _BPF_MEM_ALLOC_H
	4	#define _BPF_MEM_ALLOC_H
	5	#include <linux/compiler_types.h>
9f2c6e96	6	#include <linux/workqueue.h>
7c8199e2 AS	7
	8	struct bpf_mem_cache;
	9	struct bpf_mem_caches;
	10
	11	struct bpf_mem_alloc {
	12	struct bpf_mem_caches __percpu *caches;
	13	struct bpf_mem_cache __percpu *cache;
9f2c6e96	14	struct work_struct work;
7c8199e2 AS	15	};
7c8199e2 AS	16
5d5de3a4 HT	17	/* 'size != 0' is for bpf_mem_alloc which manages fixed-size objects.
	18	* Alloc and free are done with bpf_mem_cache_{alloc,free}().
	19	*
	20	* 'size = 0' is for bpf_mem_alloc which manages many fixed-size objects.
	21	* Alloc and free are done with bpf_mem_{alloc,free}() and the size of
	22	* the returned object is given by the size argument of bpf_mem_alloc().
	23	*/
4ab67149	24	int bpf_mem_alloc_init(struct bpf_mem_alloc *ma, int size, bool percpu);
7c8199e2 AS	25	void bpf_mem_alloc_destroy(struct bpf_mem_alloc *ma);
	26
	27	/* kmalloc/kfree equivalent: */
	28	void bpf_mem_alloc(struct bpf_mem_alloc ma, size_t size);
	29	void bpf_mem_free(struct bpf_mem_alloc ma, void ptr);
	30
	31	/* kmem_cache_alloc/free equivalent: */
	32	void bpf_mem_cache_alloc(struct bpf_mem_alloc ma);
	33	void bpf_mem_cache_free(struct bpf_mem_alloc ma, void ptr);
e65a5c6e MKL	34	void bpf_mem_cache_raw_free(void *ptr);
e65a5c6e MKL	35	void bpf_mem_cache_alloc_flags(struct bpf_mem_alloc ma, gfp_t flags);
7c8199e2 AS	36
7c8199e2 AS	37	#endif /* _BPF_MEM_ALLOC_H */