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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
15struct integrity_iint_cache;
16
17#ifdef CONFIG_EVM
18extern int evm_set_key(void *key, size_t keylen);
19extern enum integrity_status evm_verifyxattr(struct dentry *dentry,
20 const char *xattr_name,
21 void *xattr_value,
22 size_t xattr_value_len,
23 struct integrity_iint_cache *iint);
24extern int evm_inode_setattr(struct mnt_idmap *idmap,
25 struct dentry *dentry, struct iattr *attr);
26extern void evm_inode_post_setattr(struct dentry *dentry, int ia_valid);
27extern int evm_inode_setxattr(struct mnt_idmap *idmap,
28 struct dentry *dentry, const char *name,
29 const void *value, size_t size);
30extern void evm_inode_post_setxattr(struct dentry *dentry,
31 const char *xattr_name,
32 const void *xattr_value,
33 size_t xattr_value_len);
34extern int evm_inode_removexattr(struct mnt_idmap *idmap,
35 struct dentry *dentry, const char *xattr_name);
36extern void evm_inode_post_removexattr(struct dentry *dentry,
37 const char *xattr_name);
38static inline void evm_inode_post_remove_acl(struct mnt_idmap *idmap,
39 struct dentry *dentry,
40 const char *acl_name)
41{
42 evm_inode_post_removexattr(dentry, acl_name);
43}
44extern int evm_inode_set_acl(struct mnt_idmap *idmap,
45 struct dentry *dentry, const char *acl_name,
46 struct posix_acl *kacl);
47static inline int evm_inode_remove_acl(struct mnt_idmap *idmap,
48 struct dentry *dentry,
49 const char *acl_name)
50{
51 return evm_inode_set_acl(idmap, dentry, acl_name, NULL);
52}
53static inline void evm_inode_post_set_acl(struct dentry *dentry,
54 const char *acl_name,
55 struct posix_acl *kacl)
56{
57 return evm_inode_post_setxattr(dentry, acl_name, NULL, 0);
58}
59extern int evm_inode_init_security(struct inode *inode,
60 const struct xattr *xattr_array,
61 struct xattr *evm);
62extern bool evm_revalidate_status(const char *xattr_name);
63extern int evm_protected_xattr_if_enabled(const char *req_xattr_name);
64extern int evm_read_protected_xattrs(struct dentry *dentry, u8 *buffer,
65 int buffer_size, char type,
66 bool canonical_fmt);
67#ifdef CONFIG_FS_POSIX_ACL
68extern int posix_xattr_acl(const char *xattrname);
69#else
70static inline int posix_xattr_acl(const char *xattrname)
71{
72 return 0;
73}
74#endif
75#else
76
77static inline int evm_set_key(void *key, size_t keylen)
78{
79 return -EOPNOTSUPP;
80}
81
82#ifdef CONFIG_INTEGRITY
83static inline enum integrity_status evm_verifyxattr(struct dentry *dentry,
84 const char *xattr_name,
85 void *xattr_value,
86 size_t xattr_value_len,
87 struct integrity_iint_cache *iint)
88{
89 return INTEGRITY_UNKNOWN;
90}
91#endif
92
93static inline int evm_inode_setattr(struct mnt_idmap *idmap,
94 struct dentry *dentry, struct iattr *attr)
95{
96 return 0;
97}
98
99static inline void evm_inode_post_setattr(struct dentry *dentry, int ia_valid)
100{
101 return;
102}
103
104static inline int evm_inode_setxattr(struct mnt_idmap *idmap,
105 struct dentry *dentry, const char *name,
106 const void *value, size_t size)
107{
108 return 0;
109}
110
111static inline void evm_inode_post_setxattr(struct dentry *dentry,
112 const char *xattr_name,
113 const void *xattr_value,
114 size_t xattr_value_len)
115{
116 return;
117}
118
119static inline int evm_inode_removexattr(struct mnt_idmap *idmap,
120 struct dentry *dentry,
121 const char *xattr_name)
122{
123 return 0;
124}
125
126static inline void evm_inode_post_removexattr(struct dentry *dentry,
127 const char *xattr_name)
128{
129 return;
130}
131
132static inline void evm_inode_post_remove_acl(struct mnt_idmap *idmap,
133 struct dentry *dentry,
134 const char *acl_name)
135{
136 return;
137}
138
139static inline int evm_inode_set_acl(struct mnt_idmap *idmap,
140 struct dentry *dentry, const char *acl_name,
141 struct posix_acl *kacl)
142{
143 return 0;
144}
145
146static inline int evm_inode_remove_acl(struct mnt_idmap *idmap,
147 struct dentry *dentry,
148 const char *acl_name)
149{
150 return 0;
151}
152
153static inline void evm_inode_post_set_acl(struct dentry *dentry,
154 const char *acl_name,
155 struct posix_acl *kacl)
156{
157 return;
158}
159
160static inline int evm_inode_init_security(struct inode *inode,
161 const struct xattr *xattr_array,
162 struct xattr *evm)
163{
164 return 0;
165}
166
167static inline bool evm_revalidate_status(const char *xattr_name)
168{
169 return false;
170}
171
172static inline int evm_protected_xattr_if_enabled(const char *req_xattr_name)
173{
174 return false;
175}
176
177static inline int evm_read_protected_xattrs(struct dentry *dentry, u8 *buffer,
178 int buffer_size, char type,
179 bool canonical_fmt)
180{
181 return -EOPNOTSUPP;
182}
183
184#endif /* CONFIG_EVM */
185#endif /* LINUX_EVM_H */