Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * fscrypt_notsupp.h
4 *
5 * This stubs out the fscrypt functions for filesystems configured without
6 * encryption support.
7 */
8
9#ifndef _LINUX_FSCRYPT_NOTSUPP_H
10#define _LINUX_FSCRYPT_NOTSUPP_H
11
12#include <linux/fscrypt_common.h>
13
14/* crypto.c */
15static inline struct fscrypt_ctx *fscrypt_get_ctx(const struct inode *inode,
16 gfp_t gfp_flags)
17{
18 return ERR_PTR(-EOPNOTSUPP);
19}
20
21static inline void fscrypt_release_ctx(struct fscrypt_ctx *ctx)
22{
23 return;
24}
25
26static inline struct page *fscrypt_encrypt_page(const struct inode *inode,
27 struct page *page,
28 unsigned int len,
29 unsigned int offs,
30 u64 lblk_num, gfp_t gfp_flags)
31{
32 return ERR_PTR(-EOPNOTSUPP);
33}
34
35static inline int fscrypt_decrypt_page(const struct inode *inode,
36 struct page *page,
37 unsigned int len, unsigned int offs,
38 u64 lblk_num)
39{
40 return -EOPNOTSUPP;
41}
42
43
44static inline void fscrypt_restore_control_page(struct page *page)
45{
46 return;
47}
48
49static inline void fscrypt_set_d_op(struct dentry *dentry)
50{
51 return;
52}
53
54static inline void fscrypt_set_encrypted_dentry(struct dentry *dentry)
55{
56 return;
57}
58
59/* policy.c */
60static inline int fscrypt_ioctl_set_policy(struct file *filp,
61 const void __user *arg)
62{
63 return -EOPNOTSUPP;
64}
65
66static inline int fscrypt_ioctl_get_policy(struct file *filp, void __user *arg)
67{
68 return -EOPNOTSUPP;
69}
70
71static inline int fscrypt_has_permitted_context(struct inode *parent,
72 struct inode *child)
73{
74 return 0;
75}
76
77static inline int fscrypt_inherit_context(struct inode *parent,
78 struct inode *child,
79 void *fs_data, bool preload)
80{
81 return -EOPNOTSUPP;
82}
83
84/* keyinfo.c */
85static inline int fscrypt_get_encryption_info(struct inode *inode)
86{
87 return -EOPNOTSUPP;
88}
89
90static inline void fscrypt_put_encryption_info(struct inode *inode,
91 struct fscrypt_info *ci)
92{
93 return;
94}
95
96 /* fname.c */
97static inline int fscrypt_setup_filename(struct inode *dir,
98 const struct qstr *iname,
99 int lookup, struct fscrypt_name *fname)
100{
101 if (dir->i_sb->s_cop->is_encrypted(dir))
102 return -EOPNOTSUPP;
103
104 memset(fname, 0, sizeof(struct fscrypt_name));
105 fname->usr_fname = iname;
106 fname->disk_name.name = (unsigned char *)iname->name;
107 fname->disk_name.len = iname->len;
108 return 0;
109}
110
111static inline void fscrypt_free_filename(struct fscrypt_name *fname)
112{
113 return;
114}
115
116static inline u32 fscrypt_fname_encrypted_size(const struct inode *inode,
117 u32 ilen)
118{
119 /* never happens */
120 WARN_ON(1);
121 return 0;
122}
123
124static inline int fscrypt_fname_alloc_buffer(const struct inode *inode,
125 u32 ilen,
126 struct fscrypt_str *crypto_str)
127{
128 return -EOPNOTSUPP;
129}
130
131static inline void fscrypt_fname_free_buffer(struct fscrypt_str *crypto_str)
132{
133 return;
134}
135
136static inline int fscrypt_fname_disk_to_usr(struct inode *inode,
137 u32 hash, u32 minor_hash,
138 const struct fscrypt_str *iname,
139 struct fscrypt_str *oname)
140{
141 return -EOPNOTSUPP;
142}
143
144static inline int fscrypt_fname_usr_to_disk(struct inode *inode,
145 const struct qstr *iname,
146 struct fscrypt_str *oname)
147{
148 return -EOPNOTSUPP;
149}
150
151static inline bool fscrypt_match_name(const struct fscrypt_name *fname,
152 const u8 *de_name, u32 de_name_len)
153{
154 /* Encryption support disabled; use standard comparison */
155 if (de_name_len != fname->disk_name.len)
156 return false;
157 return !memcmp(de_name, fname->disk_name.name, fname->disk_name.len);
158}
159
160/* bio.c */
161static inline void fscrypt_decrypt_bio_pages(struct fscrypt_ctx *ctx,
162 struct bio *bio)
163{
164 return;
165}
166
167static inline void fscrypt_pullback_bio_page(struct page **page, bool restore)
168{
169 return;
170}
171
172static inline int fscrypt_zeroout_range(const struct inode *inode, pgoff_t lblk,
173 sector_t pblk, unsigned int len)
174{
175 return -EOPNOTSUPP;
176}
177
178#endif /* _LINUX_FSCRYPT_NOTSUPP_H */