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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>
6#include <linux/workqueue.h>
7
8struct bpf_mem_cache;
9struct bpf_mem_caches;
10
11struct bpf_mem_alloc {
12 struct bpf_mem_caches __percpu *caches;
13 struct bpf_mem_cache __percpu *cache;
14 struct work_struct work;
15};
16
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 */
24int bpf_mem_alloc_init(struct bpf_mem_alloc *ma, int size, bool percpu);
25void bpf_mem_alloc_destroy(struct bpf_mem_alloc *ma);
26
27/* kmalloc/kfree equivalent: */
28void *bpf_mem_alloc(struct bpf_mem_alloc *ma, size_t size);
29void bpf_mem_free(struct bpf_mem_alloc *ma, void *ptr);
30
31/* kmem_cache_alloc/free equivalent: */
32void *bpf_mem_cache_alloc(struct bpf_mem_alloc *ma);
33void bpf_mem_cache_free(struct bpf_mem_alloc *ma, void *ptr);
34void bpf_mem_cache_raw_free(void *ptr);
35void *bpf_mem_cache_alloc_flags(struct bpf_mem_alloc *ma, gfp_t flags);
36
37#endif /* _BPF_MEM_ALLOC_H */