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
10 bool bpf_lsm_initialized __ro_after_init;
11
12 static struct security_hook_list bpf_lsm_hooks[] __ro_after_init = {
13 #define LSM_HOOK(RET, DEFAULT, NAME, ...) \
14 LSM_HOOK_INIT(NAME, bpf_lsm_##NAME),
15 #include <linux/lsm_hook_defs.h>
16 #undef LSM_HOOK
17 LSM_HOOK_INIT(inode_free_security, bpf_inode_storage_free),
18 };
19
20 static const struct lsm_id bpf_lsmid = {
21 .name = "bpf",
22 .id = LSM_ID_BPF,
23 };
24
bpf_lsm_init(void)25 static int __init bpf_lsm_init(void)
26 {
27 security_add_hooks(bpf_lsm_hooks, ARRAY_SIZE(bpf_lsm_hooks),
28 &bpf_lsmid);
29 bpf_lsm_initialized = true;
30 pr_info("LSM support for eBPF active\n");
31 return 0;
32 }
33
34 struct lsm_blob_sizes bpf_lsm_blob_sizes __ro_after_init = {
35 .lbs_inode = sizeof(struct bpf_storage_blob),
36 };
37
38 DEFINE_LSM(bpf) = {
39 .id = &bpf_lsmid,
40 .init = bpf_lsm_init,
41 .blobs = &bpf_lsm_blob_sizes
42 };
43