tools/testing/selftests/bpf/progs/ima.c

   1 // SPDX-License-Identifier: GPL-2.0
   2
   3 /*
   4  * Copyright 2020 Google LLC.
   5  */
   6
   7 #include "vmlinux.h"
   8 #include <errno.h>
   9 #include <bpf/bpf_helpers.h>
  10 #include <bpf/bpf_tracing.h>
  11
  12 long ima_hash_ret = -1;
  13 u64 ima_hash = 0;
  14 u32 monitored_pid = 0;
  15
  16 char _license[] SEC("license") = "GPL";
  17
  18 SEC("lsm.s/bprm_committed_creds")
  19 int BPF_PROG(ima, struct linux_binprm *bprm)
  20 {
  21         u32 pid = bpf_get_current_pid_tgid() >> 32;
  22
  23         if (pid == monitored_pid)
  24                 ima_hash_ret = bpf_ima_inode_hash(bprm->file->f_inode,
  25                                                   &ima_hash, sizeof(ima_hash));
  26
  27         return 0;
  28 }