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237fead6 MH |
1 | /** |
2 | * eCryptfs: Linux filesystem encryption layer | |
3 | * Kernel declarations. | |
4 | * | |
5 | * Copyright (C) 1997-2003 Erez Zadok | |
6 | * Copyright (C) 2001-2003 Stony Brook University | |
dd2a3b7a | 7 | * Copyright (C) 2004-2007 International Business Machines Corp. |
237fead6 | 8 | * Author(s): Michael A. Halcrow <mahalcro@us.ibm.com> |
88b4a07e MH |
9 | * Trevor S. Highland <trevor.highland@gmail.com> |
10 | * Tyler Hicks <tyhicks@ou.edu> | |
237fead6 MH |
11 | * |
12 | * This program is free software; you can redistribute it and/or | |
13 | * modify it under the terms of the GNU General Public License as | |
14 | * published by the Free Software Foundation; either version 2 of the | |
15 | * License, or (at your option) any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, but | |
18 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
20 | * General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; if not, write to the Free Software | |
24 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
25 | * 02111-1307, USA. | |
26 | */ | |
27 | ||
28 | #ifndef ECRYPTFS_KERNEL_H | |
29 | #define ECRYPTFS_KERNEL_H | |
30 | ||
31 | #include <keys/user-type.h> | |
32 | #include <linux/fs.h> | |
0cc72dc7 | 33 | #include <linux/fs_stack.h> |
b65d34fd | 34 | #include <linux/namei.h> |
237fead6 | 35 | #include <linux/scatterlist.h> |
dddfa461 | 36 | #include <linux/hash.h> |
237fead6 MH |
37 | |
38 | /* Version verification for shared data structures w/ userspace */ | |
39 | #define ECRYPTFS_VERSION_MAJOR 0x00 | |
40 | #define ECRYPTFS_VERSION_MINOR 0x04 | |
88b4a07e | 41 | #define ECRYPTFS_SUPPORTED_FILE_VERSION 0x02 |
237fead6 MH |
42 | /* These flags indicate which features are supported by the kernel |
43 | * module; userspace tools such as the mount helper read | |
44 | * ECRYPTFS_VERSIONING_MASK from a sysfs handle in order to determine | |
45 | * how to behave. */ | |
17398957 MH |
46 | #define ECRYPTFS_VERSIONING_PASSPHRASE 0x00000001 |
47 | #define ECRYPTFS_VERSIONING_PUBKEY 0x00000002 | |
237fead6 | 48 | #define ECRYPTFS_VERSIONING_PLAINTEXT_PASSTHROUGH 0x00000004 |
17398957 MH |
49 | #define ECRYPTFS_VERSIONING_POLICY 0x00000008 |
50 | #define ECRYPTFS_VERSIONING_XATTR 0x00000010 | |
237fead6 | 51 | #define ECRYPTFS_VERSIONING_MASK (ECRYPTFS_VERSIONING_PASSPHRASE \ |
17398957 | 52 | | ECRYPTFS_VERSIONING_PLAINTEXT_PASSTHROUGH \ |
dd2a3b7a MH |
53 | | ECRYPTFS_VERSIONING_PUBKEY \ |
54 | | ECRYPTFS_VERSIONING_XATTR) | |
237fead6 MH |
55 | #define ECRYPTFS_MAX_PASSWORD_LENGTH 64 |
56 | #define ECRYPTFS_MAX_PASSPHRASE_BYTES ECRYPTFS_MAX_PASSWORD_LENGTH | |
57 | #define ECRYPTFS_SALT_SIZE 8 | |
58 | #define ECRYPTFS_SALT_SIZE_HEX (ECRYPTFS_SALT_SIZE*2) | |
59 | /* The original signature size is only for what is stored on disk; all | |
60 | * in-memory representations are expanded hex, so it better adapted to | |
61 | * be passed around or referenced on the command line */ | |
62 | #define ECRYPTFS_SIG_SIZE 8 | |
63 | #define ECRYPTFS_SIG_SIZE_HEX (ECRYPTFS_SIG_SIZE*2) | |
64 | #define ECRYPTFS_PASSWORD_SIG_SIZE ECRYPTFS_SIG_SIZE_HEX | |
65 | #define ECRYPTFS_MAX_KEY_BYTES 64 | |
66 | #define ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES 512 | |
67 | #define ECRYPTFS_DEFAULT_IV_BYTES 16 | |
88b4a07e | 68 | #define ECRYPTFS_FILE_VERSION 0x02 |
237fead6 MH |
69 | #define ECRYPTFS_DEFAULT_HEADER_EXTENT_SIZE 8192 |
70 | #define ECRYPTFS_DEFAULT_EXTENT_SIZE 4096 | |
71 | #define ECRYPTFS_MINIMUM_HEADER_EXTENT_SIZE 8192 | |
88b4a07e MH |
72 | #define ECRYPTFS_DEFAULT_MSG_CTX_ELEMS 32 |
73 | #define ECRYPTFS_DEFAULT_SEND_TIMEOUT HZ | |
74 | #define ECRYPTFS_MAX_MSG_CTX_TTL (HZ*3) | |
75 | #define ECRYPTFS_NLMSG_HELO 100 | |
76 | #define ECRYPTFS_NLMSG_QUIT 101 | |
77 | #define ECRYPTFS_NLMSG_REQUEST 102 | |
78 | #define ECRYPTFS_NLMSG_RESPONSE 103 | |
79 | #define ECRYPTFS_MAX_PKI_NAME_BYTES 16 | |
80 | #define ECRYPTFS_DEFAULT_NUM_USERS 4 | |
81 | #define ECRYPTFS_MAX_NUM_USERS 32768 | |
82 | #define ECRYPTFS_TRANSPORT_NETLINK 0 | |
83 | #define ECRYPTFS_TRANSPORT_CONNECTOR 1 | |
84 | #define ECRYPTFS_TRANSPORT_RELAYFS 2 | |
85 | #define ECRYPTFS_DEFAULT_TRANSPORT ECRYPTFS_TRANSPORT_NETLINK | |
dd2a3b7a | 86 | #define ECRYPTFS_XATTR_NAME "user.ecryptfs" |
237fead6 MH |
87 | |
88 | #define RFC2440_CIPHER_DES3_EDE 0x02 | |
89 | #define RFC2440_CIPHER_CAST_5 0x03 | |
90 | #define RFC2440_CIPHER_BLOWFISH 0x04 | |
91 | #define RFC2440_CIPHER_AES_128 0x07 | |
92 | #define RFC2440_CIPHER_AES_192 0x08 | |
93 | #define RFC2440_CIPHER_AES_256 0x09 | |
94 | #define RFC2440_CIPHER_TWOFISH 0x0a | |
95 | #define RFC2440_CIPHER_CAST_6 0x0b | |
96 | ||
97 | #define ECRYPTFS_SET_FLAG(flag_bit_vector, flag) (flag_bit_vector |= (flag)) | |
98 | #define ECRYPTFS_CLEAR_FLAG(flag_bit_vector, flag) (flag_bit_vector &= ~(flag)) | |
99 | #define ECRYPTFS_CHECK_FLAG(flag_bit_vector, flag) (flag_bit_vector & (flag)) | |
88b4a07e | 100 | #define RFC2440_CIPHER_RSA 0x01 |
237fead6 MH |
101 | |
102 | /** | |
103 | * For convenience, we may need to pass around the encrypted session | |
104 | * key between kernel and userspace because the authentication token | |
105 | * may not be extractable. For example, the TPM may not release the | |
106 | * private key, instead requiring the encrypted data and returning the | |
107 | * decrypted data. | |
108 | */ | |
109 | struct ecryptfs_session_key { | |
110 | #define ECRYPTFS_USERSPACE_SHOULD_TRY_TO_DECRYPT 0x00000001 | |
111 | #define ECRYPTFS_USERSPACE_SHOULD_TRY_TO_ENCRYPT 0x00000002 | |
112 | #define ECRYPTFS_CONTAINS_DECRYPTED_KEY 0x00000004 | |
113 | #define ECRYPTFS_CONTAINS_ENCRYPTED_KEY 0x00000008 | |
114 | u32 flags; | |
115 | u32 encrypted_key_size; | |
116 | u32 decrypted_key_size; | |
117 | u8 encrypted_key[ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES]; | |
118 | u8 decrypted_key[ECRYPTFS_MAX_KEY_BYTES]; | |
119 | }; | |
120 | ||
121 | struct ecryptfs_password { | |
122 | u32 password_bytes; | |
123 | s32 hash_algo; | |
124 | u32 hash_iterations; | |
125 | u32 session_key_encryption_key_bytes; | |
126 | #define ECRYPTFS_PERSISTENT_PASSWORD 0x01 | |
127 | #define ECRYPTFS_SESSION_KEY_ENCRYPTION_KEY_SET 0x02 | |
128 | u32 flags; | |
129 | /* Iterated-hash concatenation of salt and passphrase */ | |
130 | u8 session_key_encryption_key[ECRYPTFS_MAX_KEY_BYTES]; | |
131 | u8 signature[ECRYPTFS_PASSWORD_SIG_SIZE + 1]; | |
132 | /* Always in expanded hex */ | |
133 | u8 salt[ECRYPTFS_SALT_SIZE]; | |
134 | }; | |
135 | ||
136 | enum ecryptfs_token_types {ECRYPTFS_PASSWORD, ECRYPTFS_PRIVATE_KEY}; | |
137 | ||
88b4a07e MH |
138 | struct ecryptfs_private_key { |
139 | u32 key_size; | |
140 | u32 data_len; | |
141 | u8 signature[ECRYPTFS_PASSWORD_SIG_SIZE + 1]; | |
142 | char pki_type[ECRYPTFS_MAX_PKI_NAME_BYTES + 1]; | |
143 | u8 data[]; | |
144 | }; | |
145 | ||
237fead6 MH |
146 | /* May be a password or a private key */ |
147 | struct ecryptfs_auth_tok { | |
148 | u16 version; /* 8-bit major and 8-bit minor */ | |
149 | u16 token_type; | |
150 | u32 flags; | |
151 | struct ecryptfs_session_key session_key; | |
152 | u8 reserved[32]; | |
153 | union { | |
154 | struct ecryptfs_password password; | |
88b4a07e | 155 | struct ecryptfs_private_key private_key; |
237fead6 MH |
156 | } token; |
157 | } __attribute__ ((packed)); | |
158 | ||
159 | void ecryptfs_dump_auth_tok(struct ecryptfs_auth_tok *auth_tok); | |
160 | extern void ecryptfs_to_hex(char *dst, char *src, size_t src_size); | |
161 | extern void ecryptfs_from_hex(char *dst, char *src, int dst_size); | |
162 | ||
163 | struct ecryptfs_key_record { | |
164 | unsigned char type; | |
165 | size_t enc_key_size; | |
166 | unsigned char sig[ECRYPTFS_SIG_SIZE]; | |
167 | unsigned char enc_key[ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES]; | |
168 | }; | |
169 | ||
170 | struct ecryptfs_auth_tok_list { | |
171 | struct ecryptfs_auth_tok *auth_tok; | |
172 | struct list_head list; | |
173 | }; | |
174 | ||
175 | struct ecryptfs_crypt_stat; | |
176 | struct ecryptfs_mount_crypt_stat; | |
177 | ||
178 | struct ecryptfs_page_crypt_context { | |
179 | struct page *page; | |
180 | #define ECRYPTFS_PREPARE_COMMIT_MODE 0 | |
181 | #define ECRYPTFS_WRITEPAGE_MODE 1 | |
182 | unsigned int mode; | |
183 | union { | |
184 | struct file *lower_file; | |
185 | struct writeback_control *wbc; | |
186 | } param; | |
187 | }; | |
188 | ||
189 | static inline struct ecryptfs_auth_tok * | |
190 | ecryptfs_get_key_payload_data(struct key *key) | |
191 | { | |
192 | return (struct ecryptfs_auth_tok *) | |
193 | (((struct user_key_payload*)key->payload.data)->data); | |
194 | } | |
195 | ||
196 | #define ECRYPTFS_SUPER_MAGIC 0xf15f | |
197 | #define ECRYPTFS_MAX_KEYSET_SIZE 1024 | |
198 | #define ECRYPTFS_MAX_CIPHER_NAME_SIZE 32 | |
199 | #define ECRYPTFS_MAX_NUM_ENC_KEYS 64 | |
200 | #define ECRYPTFS_MAX_NUM_KEYSIGS 2 /* TODO: Make this a linked list */ | |
201 | #define ECRYPTFS_MAX_IV_BYTES 16 /* 128 bits */ | |
202 | #define ECRYPTFS_SALT_BYTES 2 | |
203 | #define MAGIC_ECRYPTFS_MARKER 0x3c81b7f5 | |
204 | #define MAGIC_ECRYPTFS_MARKER_SIZE_BYTES 8 /* 4*2 */ | |
205 | #define ECRYPTFS_FILE_SIZE_BYTES 8 | |
206 | #define ECRYPTFS_DEFAULT_CIPHER "aes" | |
207 | #define ECRYPTFS_DEFAULT_KEY_BYTES 16 | |
565d9724 | 208 | #define ECRYPTFS_DEFAULT_HASH "md5" |
88b4a07e | 209 | #define ECRYPTFS_TAG_1_PACKET_TYPE 0x01 |
237fead6 MH |
210 | #define ECRYPTFS_TAG_3_PACKET_TYPE 0x8C |
211 | #define ECRYPTFS_TAG_11_PACKET_TYPE 0xED | |
88b4a07e MH |
212 | #define ECRYPTFS_TAG_64_PACKET_TYPE 0x40 |
213 | #define ECRYPTFS_TAG_65_PACKET_TYPE 0x41 | |
214 | #define ECRYPTFS_TAG_66_PACKET_TYPE 0x42 | |
215 | #define ECRYPTFS_TAG_67_PACKET_TYPE 0x43 | |
237fead6 MH |
216 | #define MD5_DIGEST_SIZE 16 |
217 | ||
218 | /** | |
219 | * This is the primary struct associated with each encrypted file. | |
220 | * | |
221 | * TODO: cache align/pack? | |
222 | */ | |
223 | struct ecryptfs_crypt_stat { | |
224 | #define ECRYPTFS_STRUCT_INITIALIZED 0x00000001 | |
225 | #define ECRYPTFS_POLICY_APPLIED 0x00000002 | |
226 | #define ECRYPTFS_NEW_FILE 0x00000004 | |
227 | #define ECRYPTFS_ENCRYPTED 0x00000008 | |
228 | #define ECRYPTFS_SECURITY_WARNING 0x00000010 | |
229 | #define ECRYPTFS_ENABLE_HMAC 0x00000020 | |
230 | #define ECRYPTFS_ENCRYPT_IV_PAGES 0x00000040 | |
231 | #define ECRYPTFS_KEY_VALID 0x00000080 | |
17398957 MH |
232 | #define ECRYPTFS_METADATA_IN_XATTR 0x00000100 |
233 | #define ECRYPTFS_VIEW_AS_ENCRYPTED 0x00000200 | |
237fead6 MH |
234 | u32 flags; |
235 | unsigned int file_version; | |
236 | size_t iv_bytes; | |
237 | size_t num_keysigs; | |
238 | size_t header_extent_size; | |
239 | size_t num_header_extents_at_front; | |
240 | size_t extent_size; /* Data extent size; default is 4096 */ | |
241 | size_t key_size; | |
242 | size_t extent_shift; | |
243 | unsigned int extent_mask; | |
244 | struct ecryptfs_mount_crypt_stat *mount_crypt_stat; | |
8bba066f | 245 | struct crypto_blkcipher *tfm; |
565d9724 MH |
246 | struct crypto_hash *hash_tfm; /* Crypto context for generating |
247 | * the initialization vectors */ | |
237fead6 MH |
248 | unsigned char cipher[ECRYPTFS_MAX_CIPHER_NAME_SIZE]; |
249 | unsigned char key[ECRYPTFS_MAX_KEY_BYTES]; | |
250 | unsigned char root_iv[ECRYPTFS_MAX_IV_BYTES]; | |
251 | unsigned char keysigs[ECRYPTFS_MAX_NUM_KEYSIGS][ECRYPTFS_SIG_SIZE_HEX]; | |
252 | struct mutex cs_tfm_mutex; | |
565d9724 | 253 | struct mutex cs_hash_tfm_mutex; |
237fead6 MH |
254 | struct mutex cs_mutex; |
255 | }; | |
256 | ||
257 | /* inode private data. */ | |
258 | struct ecryptfs_inode_info { | |
259 | struct inode vfs_inode; | |
260 | struct inode *wii_inode; | |
261 | struct ecryptfs_crypt_stat crypt_stat; | |
262 | }; | |
263 | ||
264 | /* dentry private data. Each dentry must keep track of a lower | |
265 | * vfsmount too. */ | |
266 | struct ecryptfs_dentry_info { | |
b65d34fd | 267 | struct path lower_path; |
237fead6 MH |
268 | struct ecryptfs_crypt_stat *crypt_stat; |
269 | }; | |
270 | ||
271 | /** | |
272 | * This struct is to enable a mount-wide passphrase/salt combo. This | |
273 | * is more or less a stopgap to provide similar functionality to other | |
274 | * crypto filesystems like EncFS or CFS until full policy support is | |
275 | * implemented in eCryptfs. | |
276 | */ | |
277 | struct ecryptfs_mount_crypt_stat { | |
278 | /* Pointers to memory we do not own, do not free these */ | |
279 | #define ECRYPTFS_PLAINTEXT_PASSTHROUGH_ENABLED 0x00000001 | |
17398957 MH |
280 | #define ECRYPTFS_XATTR_METADATA_ENABLED 0x00000002 |
281 | #define ECRYPTFS_ENCRYPTED_VIEW_ENABLED 0x00000004 | |
237fead6 MH |
282 | u32 flags; |
283 | struct ecryptfs_auth_tok *global_auth_tok; | |
284 | struct key *global_auth_tok_key; | |
285 | size_t global_default_cipher_key_size; | |
8bba066f | 286 | struct crypto_blkcipher *global_key_tfm; |
237fead6 MH |
287 | struct mutex global_key_tfm_mutex; |
288 | unsigned char global_default_cipher_name[ECRYPTFS_MAX_CIPHER_NAME_SIZE | |
289 | + 1]; | |
290 | unsigned char global_auth_tok_sig[ECRYPTFS_SIG_SIZE_HEX + 1]; | |
291 | }; | |
292 | ||
293 | /* superblock private data. */ | |
294 | struct ecryptfs_sb_info { | |
295 | struct super_block *wsi_sb; | |
296 | struct ecryptfs_mount_crypt_stat mount_crypt_stat; | |
297 | }; | |
298 | ||
299 | /* file private data. */ | |
300 | struct ecryptfs_file_info { | |
301 | struct file *wfi_file; | |
302 | struct ecryptfs_crypt_stat *crypt_stat; | |
303 | }; | |
304 | ||
305 | /* auth_tok <=> encrypted_session_key mappings */ | |
306 | struct ecryptfs_auth_tok_list_item { | |
307 | unsigned char encrypted_session_key[ECRYPTFS_MAX_KEY_BYTES]; | |
308 | struct list_head list; | |
309 | struct ecryptfs_auth_tok auth_tok; | |
310 | }; | |
311 | ||
88b4a07e MH |
312 | struct ecryptfs_message { |
313 | u32 index; | |
314 | u32 data_len; | |
315 | u8 data[]; | |
316 | }; | |
317 | ||
318 | struct ecryptfs_msg_ctx { | |
319 | #define ECRYPTFS_MSG_CTX_STATE_FREE 0x0001 | |
320 | #define ECRYPTFS_MSG_CTX_STATE_PENDING 0x0002 | |
321 | #define ECRYPTFS_MSG_CTX_STATE_DONE 0x0003 | |
322 | u32 state; | |
323 | unsigned int index; | |
324 | unsigned int counter; | |
325 | struct ecryptfs_message *msg; | |
326 | struct task_struct *task; | |
327 | struct list_head node; | |
328 | struct mutex mux; | |
329 | }; | |
330 | ||
88b4a07e MH |
331 | extern unsigned int ecryptfs_transport; |
332 | ||
333 | struct ecryptfs_daemon_id { | |
334 | pid_t pid; | |
335 | uid_t uid; | |
336 | struct hlist_node id_chain; | |
337 | }; | |
338 | ||
237fead6 MH |
339 | static inline struct ecryptfs_file_info * |
340 | ecryptfs_file_to_private(struct file *file) | |
341 | { | |
342 | return (struct ecryptfs_file_info *)file->private_data; | |
343 | } | |
344 | ||
345 | static inline void | |
346 | ecryptfs_set_file_private(struct file *file, | |
347 | struct ecryptfs_file_info *file_info) | |
348 | { | |
349 | file->private_data = file_info; | |
350 | } | |
351 | ||
352 | static inline struct file *ecryptfs_file_to_lower(struct file *file) | |
353 | { | |
354 | return ((struct ecryptfs_file_info *)file->private_data)->wfi_file; | |
355 | } | |
356 | ||
357 | static inline void | |
358 | ecryptfs_set_file_lower(struct file *file, struct file *lower_file) | |
359 | { | |
360 | ((struct ecryptfs_file_info *)file->private_data)->wfi_file = | |
361 | lower_file; | |
362 | } | |
363 | ||
364 | static inline struct ecryptfs_inode_info * | |
365 | ecryptfs_inode_to_private(struct inode *inode) | |
366 | { | |
367 | return container_of(inode, struct ecryptfs_inode_info, vfs_inode); | |
368 | } | |
369 | ||
370 | static inline struct inode *ecryptfs_inode_to_lower(struct inode *inode) | |
371 | { | |
372 | return ecryptfs_inode_to_private(inode)->wii_inode; | |
373 | } | |
374 | ||
375 | static inline void | |
376 | ecryptfs_set_inode_lower(struct inode *inode, struct inode *lower_inode) | |
377 | { | |
378 | ecryptfs_inode_to_private(inode)->wii_inode = lower_inode; | |
379 | } | |
380 | ||
381 | static inline struct ecryptfs_sb_info * | |
382 | ecryptfs_superblock_to_private(struct super_block *sb) | |
383 | { | |
384 | return (struct ecryptfs_sb_info *)sb->s_fs_info; | |
385 | } | |
386 | ||
387 | static inline void | |
388 | ecryptfs_set_superblock_private(struct super_block *sb, | |
389 | struct ecryptfs_sb_info *sb_info) | |
390 | { | |
391 | sb->s_fs_info = sb_info; | |
392 | } | |
393 | ||
394 | static inline struct super_block * | |
395 | ecryptfs_superblock_to_lower(struct super_block *sb) | |
396 | { | |
397 | return ((struct ecryptfs_sb_info *)sb->s_fs_info)->wsi_sb; | |
398 | } | |
399 | ||
400 | static inline void | |
401 | ecryptfs_set_superblock_lower(struct super_block *sb, | |
402 | struct super_block *lower_sb) | |
403 | { | |
404 | ((struct ecryptfs_sb_info *)sb->s_fs_info)->wsi_sb = lower_sb; | |
405 | } | |
406 | ||
407 | static inline struct ecryptfs_dentry_info * | |
408 | ecryptfs_dentry_to_private(struct dentry *dentry) | |
409 | { | |
410 | return (struct ecryptfs_dentry_info *)dentry->d_fsdata; | |
411 | } | |
412 | ||
413 | static inline void | |
414 | ecryptfs_set_dentry_private(struct dentry *dentry, | |
415 | struct ecryptfs_dentry_info *dentry_info) | |
416 | { | |
417 | dentry->d_fsdata = dentry_info; | |
418 | } | |
419 | ||
420 | static inline struct dentry * | |
421 | ecryptfs_dentry_to_lower(struct dentry *dentry) | |
422 | { | |
b65d34fd | 423 | return ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.dentry; |
237fead6 MH |
424 | } |
425 | ||
426 | static inline void | |
427 | ecryptfs_set_dentry_lower(struct dentry *dentry, struct dentry *lower_dentry) | |
428 | { | |
b65d34fd | 429 | ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.dentry = |
237fead6 MH |
430 | lower_dentry; |
431 | } | |
432 | ||
433 | static inline struct vfsmount * | |
434 | ecryptfs_dentry_to_lower_mnt(struct dentry *dentry) | |
435 | { | |
b65d34fd | 436 | return ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.mnt; |
237fead6 MH |
437 | } |
438 | ||
439 | static inline void | |
440 | ecryptfs_set_dentry_lower_mnt(struct dentry *dentry, struct vfsmount *lower_mnt) | |
441 | { | |
b65d34fd | 442 | ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.mnt = |
237fead6 MH |
443 | lower_mnt; |
444 | } | |
445 | ||
446 | #define ecryptfs_printk(type, fmt, arg...) \ | |
447 | __ecryptfs_printk(type "%s: " fmt, __FUNCTION__, ## arg); | |
448 | void __ecryptfs_printk(const char *fmt, ...); | |
449 | ||
450 | extern const struct file_operations ecryptfs_main_fops; | |
451 | extern const struct file_operations ecryptfs_dir_fops; | |
452 | extern struct inode_operations ecryptfs_main_iops; | |
453 | extern struct inode_operations ecryptfs_dir_iops; | |
454 | extern struct inode_operations ecryptfs_symlink_iops; | |
455 | extern struct super_operations ecryptfs_sops; | |
456 | extern struct dentry_operations ecryptfs_dops; | |
457 | extern struct address_space_operations ecryptfs_aops; | |
458 | extern int ecryptfs_verbosity; | |
88b4a07e MH |
459 | extern unsigned int ecryptfs_message_buf_len; |
460 | extern signed long ecryptfs_message_wait_timeout; | |
461 | extern unsigned int ecryptfs_number_of_users; | |
237fead6 MH |
462 | |
463 | extern struct kmem_cache *ecryptfs_auth_tok_list_item_cache; | |
464 | extern struct kmem_cache *ecryptfs_file_info_cache; | |
465 | extern struct kmem_cache *ecryptfs_dentry_info_cache; | |
466 | extern struct kmem_cache *ecryptfs_inode_info_cache; | |
467 | extern struct kmem_cache *ecryptfs_sb_info_cache; | |
468 | extern struct kmem_cache *ecryptfs_header_cache_0; | |
469 | extern struct kmem_cache *ecryptfs_header_cache_1; | |
470 | extern struct kmem_cache *ecryptfs_header_cache_2; | |
dd2a3b7a | 471 | extern struct kmem_cache *ecryptfs_xattr_cache; |
237fead6 MH |
472 | extern struct kmem_cache *ecryptfs_lower_page_cache; |
473 | ||
474 | int ecryptfs_interpose(struct dentry *hidden_dentry, | |
475 | struct dentry *this_dentry, struct super_block *sb, | |
476 | int flag); | |
477 | int ecryptfs_fill_zeros(struct file *file, loff_t new_length); | |
478 | int ecryptfs_decode_filename(struct ecryptfs_crypt_stat *crypt_stat, | |
479 | const char *name, int length, | |
480 | char **decrypted_name); | |
481 | int ecryptfs_encode_filename(struct ecryptfs_crypt_stat *crypt_stat, | |
482 | const char *name, int length, | |
483 | char **encoded_name); | |
484 | struct dentry *ecryptfs_lower_dentry(struct dentry *this_dentry); | |
237fead6 MH |
485 | void ecryptfs_dump_hex(char *data, int bytes); |
486 | int virt_to_scatterlist(const void *addr, int size, struct scatterlist *sg, | |
487 | int sg_size); | |
488 | int ecryptfs_compute_root_iv(struct ecryptfs_crypt_stat *crypt_stat); | |
489 | void ecryptfs_rotate_iv(unsigned char *iv); | |
490 | void ecryptfs_init_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat); | |
491 | void ecryptfs_destruct_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat); | |
492 | void ecryptfs_destruct_mount_crypt_stat( | |
493 | struct ecryptfs_mount_crypt_stat *mount_crypt_stat); | |
494 | int ecryptfs_init_crypt_ctx(struct ecryptfs_crypt_stat *crypt_stat); | |
8bba066f MH |
495 | int ecryptfs_crypto_api_algify_cipher_name(char **algified_name, |
496 | char *cipher_name, | |
497 | char *chaining_modifier); | |
dd2a3b7a MH |
498 | #define ECRYPTFS_LOWER_I_MUTEX_NOT_HELD 0 |
499 | #define ECRYPTFS_LOWER_I_MUTEX_HELD 1 | |
500 | int ecryptfs_write_inode_size_to_metadata(struct file *lower_file, | |
501 | struct inode *lower_inode, | |
502 | struct inode *inode, | |
503 | struct dentry *ecryptfs_dentry, | |
504 | int lower_i_mutex_held); | |
237fead6 MH |
505 | int ecryptfs_get_lower_page(struct page **lower_page, struct inode *lower_inode, |
506 | struct file *lower_file, | |
507 | unsigned long lower_page_index, int byte_offset, | |
508 | int region_bytes); | |
509 | int | |
510 | ecryptfs_commit_lower_page(struct page *lower_page, struct inode *lower_inode, | |
511 | struct file *lower_file, int byte_offset, | |
512 | int region_size); | |
513 | int ecryptfs_copy_page_to_lower(struct page *page, struct inode *lower_inode, | |
514 | struct file *lower_file); | |
515 | int ecryptfs_do_readpage(struct file *file, struct page *page, | |
516 | pgoff_t lower_page_index); | |
517 | int ecryptfs_grab_and_map_lower_page(struct page **lower_page, | |
518 | char **lower_virt, | |
519 | struct inode *lower_inode, | |
520 | unsigned long lower_page_index); | |
521 | int ecryptfs_writepage_and_release_lower_page(struct page *lower_page, | |
522 | struct inode *lower_inode, | |
523 | struct writeback_control *wbc); | |
524 | int ecryptfs_encrypt_page(struct ecryptfs_page_crypt_context *ctx); | |
525 | int ecryptfs_decrypt_page(struct file *file, struct page *page); | |
dd2a3b7a MH |
526 | int ecryptfs_write_metadata(struct dentry *ecryptfs_dentry, |
527 | struct file *lower_file); | |
528 | int ecryptfs_read_metadata(struct dentry *ecryptfs_dentry, | |
237fead6 | 529 | struct file *lower_file); |
237fead6 | 530 | int ecryptfs_new_file_context(struct dentry *ecryptfs_dentry); |
dd2a3b7a MH |
531 | int ecryptfs_read_and_validate_header_region(char *data, struct dentry *dentry, |
532 | struct vfsmount *mnt); | |
533 | int ecryptfs_read_and_validate_xattr_region(char *page_virt, | |
534 | struct dentry *ecryptfs_dentry); | |
237fead6 MH |
535 | u16 ecryptfs_code_for_cipher_string(struct ecryptfs_crypt_stat *crypt_stat); |
536 | int ecryptfs_cipher_code_to_string(char *str, u16 cipher_code); | |
537 | void ecryptfs_set_default_sizes(struct ecryptfs_crypt_stat *crypt_stat); | |
538 | int ecryptfs_generate_key_packet_set(char *dest_base, | |
539 | struct ecryptfs_crypt_stat *crypt_stat, | |
540 | struct dentry *ecryptfs_dentry, | |
541 | size_t *len, size_t max); | |
542 | int process_request_key_err(long err_code); | |
543 | int | |
544 | ecryptfs_parse_packet_set(struct ecryptfs_crypt_stat *crypt_stat, | |
545 | unsigned char *src, struct dentry *ecryptfs_dentry); | |
546 | int ecryptfs_truncate(struct dentry *dentry, loff_t new_length); | |
547 | int | |
8bba066f | 548 | ecryptfs_process_cipher(struct crypto_blkcipher **key_tfm, char *cipher_name, |
e5d9cbde | 549 | size_t *key_size); |
237fead6 MH |
550 | int ecryptfs_inode_test(struct inode *inode, void *candidate_lower_inode); |
551 | int ecryptfs_inode_set(struct inode *inode, void *lower_inode); | |
552 | void ecryptfs_init_inode(struct inode *inode, struct inode *lower_inode); | |
7ff1d74f MH |
553 | int ecryptfs_open_lower_file(struct file **lower_file, |
554 | struct dentry *lower_dentry, | |
555 | struct vfsmount *lower_mnt, int flags); | |
556 | int ecryptfs_close_lower_file(struct file *lower_file); | |
dd2a3b7a MH |
557 | ssize_t ecryptfs_getxattr(struct dentry *dentry, const char *name, void *value, |
558 | size_t size); | |
559 | int | |
560 | ecryptfs_setxattr(struct dentry *dentry, const char *name, const void *value, | |
561 | size_t size, int flags); | |
237fead6 | 562 | |
88b4a07e MH |
563 | int ecryptfs_process_helo(unsigned int transport, uid_t uid, pid_t pid); |
564 | int ecryptfs_process_quit(uid_t uid, pid_t pid); | |
dddfa461 MH |
565 | int ecryptfs_process_response(struct ecryptfs_message *msg, uid_t uid, |
566 | pid_t pid, u32 seq); | |
88b4a07e MH |
567 | int ecryptfs_send_message(unsigned int transport, char *data, int data_len, |
568 | struct ecryptfs_msg_ctx **msg_ctx); | |
569 | int ecryptfs_wait_for_response(struct ecryptfs_msg_ctx *msg_ctx, | |
570 | struct ecryptfs_message **emsg); | |
571 | int ecryptfs_init_messaging(unsigned int transport); | |
572 | void ecryptfs_release_messaging(unsigned int transport); | |
573 | ||
574 | int ecryptfs_send_netlink(char *data, int data_len, | |
575 | struct ecryptfs_msg_ctx *msg_ctx, u16 msg_type, | |
576 | u16 msg_flags, pid_t daemon_pid); | |
577 | int ecryptfs_init_netlink(void); | |
578 | void ecryptfs_release_netlink(void); | |
579 | ||
580 | int ecryptfs_send_connector(char *data, int data_len, | |
581 | struct ecryptfs_msg_ctx *msg_ctx, u16 msg_type, | |
582 | u16 msg_flags, pid_t daemon_pid); | |
583 | int ecryptfs_init_connector(void); | |
584 | void ecryptfs_release_connector(void); | |
585 | ||
586 | ||
237fead6 | 587 | #endif /* #ifndef ECRYPTFS_KERNEL_H */ |