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 
9 static struct security_hook_list bpf_lsm_hooks[] __lsm_ro_after_init = {
10 	#define LSM_HOOK(RET, DEFAULT, NAME, ...) \
11 	LSM_HOOK_INIT(NAME, bpf_lsm_##NAME),
12 	#include <linux/lsm_hook_defs.h>
13 	#undef LSM_HOOK
14 	LSM_HOOK_INIT(inode_free_security, bpf_inode_storage_free),
15 	LSM_HOOK_INIT(task_free, bpf_task_storage_free),
16 };
17 
bpf_lsm_init(void)18 static int __init bpf_lsm_init(void)
19 {
20 	security_add_hooks(bpf_lsm_hooks, ARRAY_SIZE(bpf_lsm_hooks), "bpf");
21 	pr_info("LSM support for eBPF active\n");
22 	return 0;
23 }
24 
25 struct lsm_blob_sizes bpf_lsm_blob_sizes __lsm_ro_after_init = {
26 	.lbs_inode = sizeof(struct bpf_storage_blob),
27 	.lbs_task = sizeof(struct bpf_storage_blob),
28 };
29 
30 DEFINE_LSM(bpf) = {
31 	.name = "bpf",
32 	.init = bpf_lsm_init,
33 	.blobs = &bpf_lsm_blob_sizes
34 };
35