path: root/kernel/bpf/bpf_struct_ops.c

// SPDX-License-Identifier: GPL-2.0-only
/* Copyright (c) 2019 Facebook */

#include <linux/bpf.h>
#include <linux/bpf_verifier.h>
#include <linux/btf.h>
#include <linux/filter.h>
#include <linux/slab.h>
#include <linux/numa.h>
#include <linux/seq_file.h>
#include <linux/refcount.h>
#include <linux/mutex.h>
#include <linux/btf_ids.h>
#include <linux/rcupdate_wait.h>
#include <linux/poll.h>

struct bpf_struct_ops_value {
	struct bpf_struct_ops_common_value common;
	char data[] ____cacheline_aligned_in_smp;
};

#define MAX_TRAMP_IMAGE_PAGES 8

struct bpf_struct_ops_map {
	struct bpf_map map;
	const struct bpf_struct_ops_desc *st_ops_desc;
	/* protect map_update */
	struct mutex lock;
	/* link has all the bpf_links that is populated
	 * to the func ptr of the kernel's struct
	 * (in kvalue.data).
	 */
	struct bpf_link **links;
	/* ksyms for bpf trampolines */
	struct bpf_ksym