1 /* SPDX-License-Identifier: GPL-2.0 */
5 * This stubs out the fscrypt functions for filesystems configured without
8 * Do not include this file directly. Use fscrypt.h instead!
10 #ifndef _LINUX_FSCRYPT_H
11 #error "Incorrect include of linux/fscrypt_notsupp.h!"
14 #ifndef _LINUX_FSCRYPT_NOTSUPP_H
15 #define _LINUX_FSCRYPT_NOTSUPP_H
17 static inline bool fscrypt_has_encryption_key(const struct inode *inode)
22 static inline bool fscrypt_dummy_context_enabled(struct inode *inode)
28 static inline struct fscrypt_ctx *fscrypt_get_ctx(const struct inode *inode,
31 return ERR_PTR(-EOPNOTSUPP);
34 static inline void fscrypt_release_ctx(struct fscrypt_ctx *ctx)
39 static inline struct page *fscrypt_encrypt_page(const struct inode *inode,
43 u64 lblk_num, gfp_t gfp_flags)
45 return ERR_PTR(-EOPNOTSUPP);
48 static inline int fscrypt_decrypt_page(const struct inode *inode,
50 unsigned int len, unsigned int offs,
56 static inline struct page *fscrypt_control_page(struct page *page)
59 return ERR_PTR(-EINVAL);
62 static inline void fscrypt_restore_control_page(struct page *page)
68 static inline int fscrypt_ioctl_set_policy(struct file *filp,
69 const void __user *arg)
74 static inline int fscrypt_ioctl_get_policy(struct file *filp, void __user *arg)
79 static inline int fscrypt_has_permitted_context(struct inode *parent,
85 static inline int fscrypt_inherit_context(struct inode *parent,
87 void *fs_data, bool preload)
93 static inline int fscrypt_get_encryption_info(struct inode *inode)
98 static inline void fscrypt_put_encryption_info(struct inode *inode)
104 static inline int fscrypt_setup_filename(struct inode *dir,
105 const struct qstr *iname,
106 int lookup, struct fscrypt_name *fname)
108 if (IS_ENCRYPTED(dir))
111 memset(fname, 0, sizeof(struct fscrypt_name));
112 fname->usr_fname = iname;
113 fname->disk_name.name = (unsigned char *)iname->name;
114 fname->disk_name.len = iname->len;
118 static inline void fscrypt_free_filename(struct fscrypt_name *fname)
123 static inline int fscrypt_fname_alloc_buffer(const struct inode *inode,
124 u32 max_encrypted_len,
125 struct fscrypt_str *crypto_str)
130 static inline void fscrypt_fname_free_buffer(struct fscrypt_str *crypto_str)
135 static 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)
143 static inline bool fscrypt_match_name(const struct fscrypt_name *fname,
144 const u8 *de_name, u32 de_name_len)
146 /* Encryption support disabled; use standard comparison */
147 if (de_name_len != fname->disk_name.len)
149 return !memcmp(de_name, fname->disk_name.name, fname->disk_name.len);
153 static inline void fscrypt_decrypt_bio_pages(struct fscrypt_ctx *ctx,
159 static inline void fscrypt_pullback_bio_page(struct page **page, bool restore)
164 static inline int fscrypt_zeroout_range(const struct inode *inode, pgoff_t lblk,
165 sector_t pblk, unsigned int len)
172 static inline int fscrypt_file_open(struct inode *inode, struct file *filp)
174 if (IS_ENCRYPTED(inode))
179 static inline int __fscrypt_prepare_link(struct inode *inode,
185 static inline int __fscrypt_prepare_rename(struct inode *old_dir,
186 struct dentry *old_dentry,
187 struct inode *new_dir,
188 struct dentry *new_dentry,
194 static inline int __fscrypt_prepare_lookup(struct inode *dir,
195 struct dentry *dentry)
200 static inline int __fscrypt_prepare_symlink(struct inode *dir,
202 unsigned int max_len,
203 struct fscrypt_str *disk_link)
208 static inline int __fscrypt_encrypt_symlink(struct inode *inode,
211 struct fscrypt_str *disk_link)
216 static inline const char *fscrypt_get_symlink(struct inode *inode,
218 unsigned int max_size,
219 struct delayed_call *done)
221 return ERR_PTR(-EOPNOTSUPP);
224 #endif /* _LINUX_FSCRYPT_NOTSUPP_H */