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 21 struct bpf_storage_blob { 22 struct bpf_local_storage __rcu *storage; 23 }; 24 25 extern struct lsm_blob_sizes bpf_lsm_blob_sizes; 26 27 int bpf_lsm_verify_prog(struct bpf_verifier_log *vlog, 28 const struct bpf_prog *prog); 29 30 bool bpf_lsm_is_sleepable_hook(u32 btf_id); 31 32 static 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 41 extern const struct bpf_func_proto bpf_inode_storage_get_proto; 42 extern const struct bpf_func_proto bpf_inode_storage_delete_proto; 43 void bpf_inode_storage_free(struct inode *inode); 44 45 #else /* !CONFIG_BPF_LSM */ 46 47 static inline bool bpf_lsm_is_sleepable_hook(u32 btf_id) 48 { 49 return false; 50 } 51 52 static inline int bpf_lsm_verify_prog(struct bpf_verifier_log *vlog, 53 const struct bpf_prog *prog) 54 { 55 return -EOPNOTSUPP; 56 } 57 58 static inline struct bpf_storage_blob *bpf_inode( 59 const struct inode *inode) 60 { 61 return NULL; 62 } 63 64 static 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