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
   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
  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 };