hooks.c

 1// SPDX-License-Identifier: GPL-2.0
 2
 3/*
 4 * Copyright (C) 2020 Google LLC.
 5 */
 6#include <linux/lsm_hooks.h>
 7#include <linux/bpf_lsm.h>
 8#include <uapi/linux/lsm.h>
 9
10static struct security_hook_list bpf_lsm_hooks[] __ro_after_init = {
11	#define LSM_HOOK(RET, DEFAULT, NAME, ...) \
12	LSM_HOOK_INIT(NAME, bpf_lsm_##NAME),
13	#include <linux/lsm_hook_defs.h>
14	#undef LSM_HOOK
15	LSM_HOOK_INIT(inode_free_security, bpf_inode_storage_free),
16};
17
18static const struct lsm_id bpf_lsmid = {
19	.name = "bpf",
20	.id = LSM_ID_BPF,
21};
22
23static int __init bpf_lsm_init(void)
24{
25	security_add_hooks(bpf_lsm_hooks, ARRAY_SIZE(bpf_lsm_hooks),
26			   &bpf_lsmid);
27	pr_info("LSM support for eBPF active\n");
28	return 0;
29}
30
31struct lsm_blob_sizes bpf_lsm_blob_sizes __ro_after_init = {
32	.lbs_inode = sizeof(struct bpf_storage_blob),
33};
34
35DEFINE_LSM(bpf) = {
36	.id = &bpf_lsmid,
37	.init = bpf_lsm_init,
38	.blobs = &bpf_lsm_blob_sizes
39};