kernel/bpf/bpf_lsm.c

// SPDX-License-Identifier: GPL-2.0

/*
 * Copyright (C) 2020 Google LLC.
 */

#include <linux/filter.h>
#include <linux/bpf.h>
#include <linux/btf.h>
#include <linux/lsm_hooks.h>
#include <linux/bpf_lsm.h>

/* For every LSM hook that allows attachment of BPF programs, declare a nop
 * function where a BPF program can be attached.
 */
#define LSM_HOOK(RET, DEFAULT, NAME, ...)	\
noinline RET bpf_lsm_##NAME(__VA_ARGS__)	\
{						\
	return DEFAULT;				\
}

#include <linux/lsm_hook_defs.h>
#undef LSM_HOOK

const struct bpf_prog_ops lsm_prog_ops = {
};

const struct bpf_verifier_ops lsm_verifier_ops = {
	.get_func_proto = bpf_tracing_func_proto,
	.is_valid_access = btf_ctx_access,
};