LXR linux/include/linux/bpf

   1/* SPDX-License-Identifier: GPL-2.0 */
   2
   3/*
   4 * Copyright (C) 2020 Google LLC.
   5 */
   6
   7#ifndef _LINUX_BPF_LSM_H
   8#define _LINUX_BPF_LSM_H
   9
  10#include <linux/sched.h>
  11#include <linux/bpf.h>
  12#include <linux/lsm_hooks.h>
  13
  14#ifdef CONFIG_BPF_LSM
  15
  16#define LSM_HOOK(RET, DEFAULT, NAME, ...) \
  17        RET bpf_lsm_##NAME(__VA_ARGS__);
  18#include <linux/lsm_hook_defs.h>
  19#undef LSM_HOOK
  20
  21struct bpf_storage_blob {
  22        struct bpf_local_storage __rcu *storage;
  23};
  24
  25extern struct lsm_blob_sizes bpf_lsm_blob_sizes;
  26
  27int bpf_lsm_verify_prog(struct bpf_verifier_log *vlog,
  28                        const struct bpf_prog *prog);
  29
  30bool bpf_lsm_is_sleepable_hook(u32 btf_id);
  31
  32static inline struct bpf_storage_blob *bpf_inode(
  33        const struct inode *inode)
  34{
  35        if (unlikely(!inode->i_security))
  36                return NULL;
  37
  38        return inode->i_security + bpf_lsm_blob_sizes.lbs_inode;
  39}
  40
  41extern const struct bpf_func_proto bpf_inode_storage_get_proto;
  42extern const struct bpf_func_proto bpf_inode_storage_delete_proto;
  43void bpf_inode_storage_free(struct inode *inode);
  44
  45#else /* !CONFIG_BPF_LSM */
  46
  47static inline bool bpf_lsm_is_sleepable_hook(u32 btf_id)
  48{
  49        return false;
  50}
  51
  52static inline int bpf_lsm_verify_prog(struct bpf_verifier_log *vlog,
  53                                      const struct bpf_prog *prog)
  54{
  55        return -EOPNOTSUPP;
  56}
  57
  58static inline struct bpf_storage_blob *bpf_inode(
  59        const struct inode *inode)
  60{
  61        return NULL;
  62}
  63
  64static inline void bpf_inode_storage_free(struct inode *inode)
  65{
  66}
  67
  68#endif /* CONFIG_BPF_LSM */
  69
  70#endif /* _LINUX_BPF_LSM_H */
  71