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         LSM_HOOK_INIT(task_free, bpf_task_storage_free),
  17 };
  18
  19 static const struct lsm_id bpf_lsmid = {
  20         .name = "bpf",
  21         .id = LSM_ID_BPF,
  22 };
  23
  24 static int __init bpf_lsm_init(void)
  25 {
  26         security_add_hooks(bpf_lsm_hooks, ARRAY_SIZE(bpf_lsm_hooks),
  27                            &bpf_lsmid);
  28         pr_info("LSM support for eBPF active\n");
  29         return 0;
  30 }
  31
  32 struct lsm_blob_sizes bpf_lsm_blob_sizes __ro_after_init = {
  33         .lbs_inode = sizeof(struct bpf_storage_blob),
  34         .lbs_task = sizeof(struct bpf_storage_blob),
  35 };
  36
  37 DEFINE_LSM(bpf) = {
  38         .name = "bpf",
  39         .init = bpf_lsm_init,
  40         .blobs = &bpf_lsm_blob_sizes
  41 };