security/bpf/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
  10 static 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
  18 static const struct lsm_id bpf_lsmid = {
  19         .name = "bpf",
  20         .id = LSM_ID_BPF,
  21 };
  22
  23 static 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
  31 struct lsm_blob_sizes bpf_lsm_blob_sizes __ro_after_init = {
  32         .lbs_inode = sizeof(struct bpf_storage_blob),
  33 };
  34
  35 DEFINE_LSM(bpf) = {
  36         .name = "bpf",
  37         .init = bpf_lsm_init,
  38         .blobs = &bpf_lsm_blob_sizes
  39 };