1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * evm.h
4 *
5 * Copyright (c) 2009 IBM Corporation
6 * Author: Mimi Zohar <zohar@us.ibm.com>
7 */
8
9 #ifndef _LINUX_EVM_H
10 #define _LINUX_EVM_H
11
12 #include <linux/integrity.h>
13 #include <linux/xattr.h>
14
15 #ifdef CONFIG_EVM
16 extern int evm_set_key(void *key, size_t keylen);
17 extern enum integrity_status evm_verifyxattr(struct dentry *dentry,
18 const char *xattr_name,
19 void *xattr_value,
20 size_t xattr_value_len);
21 int evm_inode_init_security(struct inode *inode, struct inode *dir,
22 const struct qstr *qstr, struct xattr *xattrs,
23 int *xattr_count);
24 extern bool evm_revalidate_status(const char *xattr_name);
25 extern int evm_protected_xattr_if_enabled(const char *req_xattr_name);
26 extern int evm_read_protected_xattrs(struct dentry *dentry, u8 *buffer,
27 int buffer_size, char type,
28 bool canonical_fmt);
29 extern bool evm_metadata_changed(struct inode *inode,
30 struct inode *metadata_inode);
31 #ifdef CONFIG_FS_POSIX_ACL
32 extern int posix_xattr_acl(const char *xattrname);
33 #else
34 static inline int posix_xattr_acl(const char *xattrname)
35 {
36 return 0;
37 }
38 #endif
39 #else
40
41 static inline int evm_set_key(void *key, size_t keylen)
42 {
43 return -EOPNOTSUPP;
44 }
45
46 #ifdef CONFIG_INTEGRITY
47 static inline enum integrity_status evm_verifyxattr(struct dentry *dentry,
48 const char *xattr_name,
49 void *xattr_value,
50 size_t xattr_value_len)
51 {
52 return INTEGRITY_UNKNOWN;
53 }
54 #endif
55
56 static inline int evm_inode_init_security(struct inode *inode, struct inode *dir,
57 const struct qstr *qstr,
58 struct xattr *xattrs,
59 int *xattr_count)
60 {
61 return 0;
62 }
63
64 static inline bool evm_revalidate_status(const char *xattr_name)
65 {
66 return false;
67 }
68
69 static inline int evm_protected_xattr_if_enabled(const char *req_xattr_name)
70 {
71 return false;
72 }
73
74 static inline int evm_read_protected_xattrs(struct dentry *dentry, u8 *buffer,
75 int buffer_size, char type,
76 bool canonical_fmt)
77 {
78 return -EOPNOTSUPP;
79 }
80
81 static inline bool evm_metadata_changed(struct inode *inode,
82 struct inode *metadata_inode)
83 {
84 return false;
85 }
86
87 #endif /* CONFIG_EVM */
88 #endif /* LINUX_EVM_H */
89
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