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1/*
2 * fscrypt_notsupp.h
3 *
4 * This stubs out the fscrypt functions for filesystems configured without
5 * encryption support.
6 */
7
8#ifndef _LINUX_FSCRYPT_NOTSUPP_H
9#define _LINUX_FSCRYPT_NOTSUPP_H
10
11#include <linux/fscrypt_common.h>
12
13/* crypto.c */
14static inline struct fscrypt_ctx *fscrypt_get_ctx(const struct inode *inode,
15 gfp_t gfp_flags)
16{
17 return ERR_PTR(-EOPNOTSUPP);
18}
19
20static inline void fscrypt_release_ctx(struct fscrypt_ctx *ctx)
21{
22 return;
23}
24
25static inline struct page *fscrypt_encrypt_page(const struct inode *inode,
26 struct page *page,
27 unsigned int len,
28 unsigned int offs,
29 u64 lblk_num, gfp_t gfp_flags)
30{
31 return ERR_PTR(-EOPNOTSUPP);
32}
33
34static inline int fscrypt_decrypt_page(const struct inode *inode,
35 struct page *page,
36 unsigned int len, unsigned int offs,
37 u64 lblk_num)
38{
39 return -EOPNOTSUPP;
40}
41
42
43static inline void fscrypt_restore_control_page(struct page *page)
44{
45 return;
46}
47
48static inline void fscrypt_set_d_op(struct dentry *dentry)
49{
50 return;
51}
52
53static inline void fscrypt_set_encrypted_dentry(struct dentry *dentry)
54{
55 return;
56}
57
58/* policy.c */
59static inline int fscrypt_ioctl_set_policy(struct file *filp,
60 const void __user *arg)
61{
62 return -EOPNOTSUPP;
63}
64
65static inline int fscrypt_ioctl_get_policy(struct file *filp, void __user *arg)
66{
67 return -EOPNOTSUPP;
68}
69
70static inline int fscrypt_has_permitted_context(struct inode *parent,
71 struct inode *child)
72{
73 return 0;
74}
75
76static inline int fscrypt_inherit_context(struct inode *parent,
77 struct inode *child,
78 void *fs_data, bool preload)
79{
80 return -EOPNOTSUPP;
81}
82
83/* keyinfo.c */
84static inline int fscrypt_get_encryption_info(struct inode *inode)
85{
86 return -EOPNOTSUPP;
87}
88
89static inline void fscrypt_put_encryption_info(struct inode *inode,
90 struct fscrypt_info *ci)
91{
92 return;
93}
94
95 /* fname.c */
96static inline int fscrypt_setup_filename(struct inode *dir,
97 const struct qstr *iname,
98 int lookup, struct fscrypt_name *fname)
99{
100 if (dir->i_sb->s_cop->is_encrypted(dir))
101 return -EOPNOTSUPP;
102
103 memset(fname, 0, sizeof(struct fscrypt_name));
104 fname->usr_fname = iname;
105 fname->disk_name.name = (unsigned char *)iname->name;
106 fname->disk_name.len = iname->len;
107 return 0;
108}
109
110static inline void fscrypt_free_filename(struct fscrypt_name *fname)
111{
112 return;
113}
114
115static inline u32 fscrypt_fname_encrypted_size(const struct inode *inode,
116 u32 ilen)
117{
118 /* never happens */
119 WARN_ON(1);
120 return 0;
121}
122
123static inline int fscrypt_fname_alloc_buffer(const struct inode *inode,
124 u32 ilen,
125 struct fscrypt_str *crypto_str)
126{
127 return -EOPNOTSUPP;
128}
129
130static inline void fscrypt_fname_free_buffer(struct fscrypt_str *crypto_str)
131{
132 return;
133}
134
135static inline int fscrypt_fname_disk_to_usr(struct inode *inode,
136 u32 hash, u32 minor_hash,
137 const struct fscrypt_str *iname,
138 struct fscrypt_str *oname)
139{
140 return -EOPNOTSUPP;
141}
142
143static inline int fscrypt_fname_usr_to_disk(struct inode *inode,
144 const struct qstr *iname,
145 struct fscrypt_str *oname)
146{
147 return -EOPNOTSUPP;
148}
149
150static inline bool fscrypt_match_name(const struct fscrypt_name *fname,
151 const u8 *de_name, u32 de_name_len)
152{
153 /* Encryption support disabled; use standard comparison */
154 if (de_name_len != fname->disk_name.len)
155 return false;
156 return !memcmp(de_name, fname->disk_name.name, fname->disk_name.len);
157}
158
159/* bio.c */
160static inline void fscrypt_decrypt_bio_pages(struct fscrypt_ctx *ctx,
161 struct bio *bio)
162{
163 return;
164}
165
166static inline void fscrypt_pullback_bio_page(struct page **page, bool restore)
167{
168 return;
169}
170
171static inline int fscrypt_zeroout_range(const struct inode *inode, pgoff_t lblk,
172 sector_t pblk, unsigned int len)
173{
174 return -EOPNOTSUPP;
175}
176
177#endif /* _LINUX_FSCRYPT_NOTSUPP_H */