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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 | |
45eaab79 | 41 | #define ECRYPTFS_SUPPORTED_FILE_VERSION 0x03 |
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 | |
f4aad16a | 51 | #define ECRYPTFS_VERSIONING_MULTKEY 0x00000020 |
237fead6 | 52 | #define ECRYPTFS_VERSIONING_MASK (ECRYPTFS_VERSIONING_PASSPHRASE \ |
17398957 | 53 | | ECRYPTFS_VERSIONING_PLAINTEXT_PASSTHROUGH \ |
dd2a3b7a | 54 | | ECRYPTFS_VERSIONING_PUBKEY \ |
f4aad16a MH |
55 | | ECRYPTFS_VERSIONING_XATTR \ |
56 | | ECRYPTFS_VERSIONING_MULTKEY) | |
237fead6 MH |
57 | #define ECRYPTFS_MAX_PASSWORD_LENGTH 64 |
58 | #define ECRYPTFS_MAX_PASSPHRASE_BYTES ECRYPTFS_MAX_PASSWORD_LENGTH | |
59 | #define ECRYPTFS_SALT_SIZE 8 | |
60 | #define ECRYPTFS_SALT_SIZE_HEX (ECRYPTFS_SALT_SIZE*2) | |
61 | /* The original signature size is only for what is stored on disk; all | |
62 | * in-memory representations are expanded hex, so it better adapted to | |
63 | * be passed around or referenced on the command line */ | |
64 | #define ECRYPTFS_SIG_SIZE 8 | |
65 | #define ECRYPTFS_SIG_SIZE_HEX (ECRYPTFS_SIG_SIZE*2) | |
66 | #define ECRYPTFS_PASSWORD_SIG_SIZE ECRYPTFS_SIG_SIZE_HEX | |
67 | #define ECRYPTFS_MAX_KEY_BYTES 64 | |
68 | #define ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES 512 | |
69 | #define ECRYPTFS_DEFAULT_IV_BYTES 16 | |
45eaab79 | 70 | #define ECRYPTFS_FILE_VERSION 0x03 |
237fead6 MH |
71 | #define ECRYPTFS_DEFAULT_EXTENT_SIZE 4096 |
72 | #define ECRYPTFS_MINIMUM_HEADER_EXTENT_SIZE 8192 | |
88b4a07e MH |
73 | #define ECRYPTFS_DEFAULT_MSG_CTX_ELEMS 32 |
74 | #define ECRYPTFS_DEFAULT_SEND_TIMEOUT HZ | |
75 | #define ECRYPTFS_MAX_MSG_CTX_TTL (HZ*3) | |
76 | #define ECRYPTFS_NLMSG_HELO 100 | |
77 | #define ECRYPTFS_NLMSG_QUIT 101 | |
78 | #define ECRYPTFS_NLMSG_REQUEST 102 | |
79 | #define ECRYPTFS_NLMSG_RESPONSE 103 | |
80 | #define ECRYPTFS_MAX_PKI_NAME_BYTES 16 | |
81 | #define ECRYPTFS_DEFAULT_NUM_USERS 4 | |
82 | #define ECRYPTFS_MAX_NUM_USERS 32768 | |
83 | #define ECRYPTFS_TRANSPORT_NETLINK 0 | |
84 | #define ECRYPTFS_TRANSPORT_CONNECTOR 1 | |
85 | #define ECRYPTFS_TRANSPORT_RELAYFS 2 | |
86 | #define ECRYPTFS_DEFAULT_TRANSPORT ECRYPTFS_TRANSPORT_NETLINK | |
dd2a3b7a | 87 | #define ECRYPTFS_XATTR_NAME "user.ecryptfs" |
237fead6 MH |
88 | |
89 | #define RFC2440_CIPHER_DES3_EDE 0x02 | |
90 | #define RFC2440_CIPHER_CAST_5 0x03 | |
91 | #define RFC2440_CIPHER_BLOWFISH 0x04 | |
92 | #define RFC2440_CIPHER_AES_128 0x07 | |
93 | #define RFC2440_CIPHER_AES_192 0x08 | |
94 | #define RFC2440_CIPHER_AES_256 0x09 | |
95 | #define RFC2440_CIPHER_TWOFISH 0x0a | |
96 | #define RFC2440_CIPHER_CAST_6 0x0b | |
97 | ||
88b4a07e | 98 | #define RFC2440_CIPHER_RSA 0x01 |
237fead6 MH |
99 | |
100 | /** | |
101 | * For convenience, we may need to pass around the encrypted session | |
102 | * key between kernel and userspace because the authentication token | |
103 | * may not be extractable. For example, the TPM may not release the | |
104 | * private key, instead requiring the encrypted data and returning the | |
105 | * decrypted data. | |
106 | */ | |
107 | struct ecryptfs_session_key { | |
108 | #define ECRYPTFS_USERSPACE_SHOULD_TRY_TO_DECRYPT 0x00000001 | |
109 | #define ECRYPTFS_USERSPACE_SHOULD_TRY_TO_ENCRYPT 0x00000002 | |
110 | #define ECRYPTFS_CONTAINS_DECRYPTED_KEY 0x00000004 | |
111 | #define ECRYPTFS_CONTAINS_ENCRYPTED_KEY 0x00000008 | |
112 | u32 flags; | |
113 | u32 encrypted_key_size; | |
114 | u32 decrypted_key_size; | |
115 | u8 encrypted_key[ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES]; | |
116 | u8 decrypted_key[ECRYPTFS_MAX_KEY_BYTES]; | |
117 | }; | |
118 | ||
119 | struct ecryptfs_password { | |
120 | u32 password_bytes; | |
121 | s32 hash_algo; | |
122 | u32 hash_iterations; | |
123 | u32 session_key_encryption_key_bytes; | |
124 | #define ECRYPTFS_PERSISTENT_PASSWORD 0x01 | |
125 | #define ECRYPTFS_SESSION_KEY_ENCRYPTION_KEY_SET 0x02 | |
126 | u32 flags; | |
127 | /* Iterated-hash concatenation of salt and passphrase */ | |
128 | u8 session_key_encryption_key[ECRYPTFS_MAX_KEY_BYTES]; | |
129 | u8 signature[ECRYPTFS_PASSWORD_SIG_SIZE + 1]; | |
130 | /* Always in expanded hex */ | |
131 | u8 salt[ECRYPTFS_SALT_SIZE]; | |
132 | }; | |
133 | ||
134 | enum ecryptfs_token_types {ECRYPTFS_PASSWORD, ECRYPTFS_PRIVATE_KEY}; | |
135 | ||
88b4a07e MH |
136 | struct ecryptfs_private_key { |
137 | u32 key_size; | |
138 | u32 data_len; | |
139 | u8 signature[ECRYPTFS_PASSWORD_SIG_SIZE + 1]; | |
140 | char pki_type[ECRYPTFS_MAX_PKI_NAME_BYTES + 1]; | |
141 | u8 data[]; | |
142 | }; | |
143 | ||
237fead6 MH |
144 | /* May be a password or a private key */ |
145 | struct ecryptfs_auth_tok { | |
146 | u16 version; /* 8-bit major and 8-bit minor */ | |
147 | u16 token_type; | |
f4aad16a | 148 | #define ECRYPTFS_ENCRYPT_ONLY 0x00000001 |
237fead6 MH |
149 | u32 flags; |
150 | struct ecryptfs_session_key session_key; | |
151 | u8 reserved[32]; | |
152 | union { | |
153 | struct ecryptfs_password password; | |
88b4a07e | 154 | struct ecryptfs_private_key private_key; |
237fead6 MH |
155 | } token; |
156 | } __attribute__ ((packed)); | |
157 | ||
158 | void ecryptfs_dump_auth_tok(struct ecryptfs_auth_tok *auth_tok); | |
159 | extern void ecryptfs_to_hex(char *dst, char *src, size_t src_size); | |
160 | extern void ecryptfs_from_hex(char *dst, char *src, int dst_size); | |
161 | ||
162 | struct ecryptfs_key_record { | |
163 | unsigned char type; | |
164 | size_t enc_key_size; | |
165 | unsigned char sig[ECRYPTFS_SIG_SIZE]; | |
166 | unsigned char enc_key[ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES]; | |
167 | }; | |
168 | ||
169 | struct ecryptfs_auth_tok_list { | |
170 | struct ecryptfs_auth_tok *auth_tok; | |
171 | struct list_head list; | |
172 | }; | |
173 | ||
174 | struct ecryptfs_crypt_stat; | |
175 | struct ecryptfs_mount_crypt_stat; | |
176 | ||
177 | struct ecryptfs_page_crypt_context { | |
178 | struct page *page; | |
179 | #define ECRYPTFS_PREPARE_COMMIT_MODE 0 | |
180 | #define ECRYPTFS_WRITEPAGE_MODE 1 | |
181 | unsigned int mode; | |
182 | union { | |
183 | struct file *lower_file; | |
184 | struct writeback_control *wbc; | |
185 | } param; | |
186 | }; | |
187 | ||
188 | static inline struct ecryptfs_auth_tok * | |
189 | ecryptfs_get_key_payload_data(struct key *key) | |
190 | { | |
191 | return (struct ecryptfs_auth_tok *) | |
192 | (((struct user_key_payload*)key->payload.data)->data); | |
193 | } | |
194 | ||
195 | #define ECRYPTFS_SUPER_MAGIC 0xf15f | |
196 | #define ECRYPTFS_MAX_KEYSET_SIZE 1024 | |
197 | #define ECRYPTFS_MAX_CIPHER_NAME_SIZE 32 | |
198 | #define ECRYPTFS_MAX_NUM_ENC_KEYS 64 | |
237fead6 MH |
199 | #define ECRYPTFS_MAX_IV_BYTES 16 /* 128 bits */ |
200 | #define ECRYPTFS_SALT_BYTES 2 | |
201 | #define MAGIC_ECRYPTFS_MARKER 0x3c81b7f5 | |
202 | #define MAGIC_ECRYPTFS_MARKER_SIZE_BYTES 8 /* 4*2 */ | |
45eaab79 | 203 | #define ECRYPTFS_FILE_SIZE_BYTES (sizeof(u64)) |
237fead6 MH |
204 | #define ECRYPTFS_DEFAULT_CIPHER "aes" |
205 | #define ECRYPTFS_DEFAULT_KEY_BYTES 16 | |
565d9724 | 206 | #define ECRYPTFS_DEFAULT_HASH "md5" |
88b4a07e | 207 | #define ECRYPTFS_TAG_1_PACKET_TYPE 0x01 |
237fead6 MH |
208 | #define ECRYPTFS_TAG_3_PACKET_TYPE 0x8C |
209 | #define ECRYPTFS_TAG_11_PACKET_TYPE 0xED | |
88b4a07e MH |
210 | #define ECRYPTFS_TAG_64_PACKET_TYPE 0x40 |
211 | #define ECRYPTFS_TAG_65_PACKET_TYPE 0x41 | |
212 | #define ECRYPTFS_TAG_66_PACKET_TYPE 0x42 | |
213 | #define ECRYPTFS_TAG_67_PACKET_TYPE 0x43 | |
237fead6 MH |
214 | #define MD5_DIGEST_SIZE 16 |
215 | ||
f4aad16a MH |
216 | struct ecryptfs_key_sig { |
217 | struct list_head crypt_stat_list; | |
218 | char keysig[ECRYPTFS_SIG_SIZE_HEX]; | |
219 | }; | |
220 | ||
237fead6 MH |
221 | /** |
222 | * This is the primary struct associated with each encrypted file. | |
223 | * | |
224 | * TODO: cache align/pack? | |
225 | */ | |
226 | struct ecryptfs_crypt_stat { | |
227 | #define ECRYPTFS_STRUCT_INITIALIZED 0x00000001 | |
228 | #define ECRYPTFS_POLICY_APPLIED 0x00000002 | |
229 | #define ECRYPTFS_NEW_FILE 0x00000004 | |
230 | #define ECRYPTFS_ENCRYPTED 0x00000008 | |
231 | #define ECRYPTFS_SECURITY_WARNING 0x00000010 | |
232 | #define ECRYPTFS_ENABLE_HMAC 0x00000020 | |
233 | #define ECRYPTFS_ENCRYPT_IV_PAGES 0x00000040 | |
234 | #define ECRYPTFS_KEY_VALID 0x00000080 | |
17398957 MH |
235 | #define ECRYPTFS_METADATA_IN_XATTR 0x00000100 |
236 | #define ECRYPTFS_VIEW_AS_ENCRYPTED 0x00000200 | |
237fead6 MH |
237 | u32 flags; |
238 | unsigned int file_version; | |
239 | size_t iv_bytes; | |
237fead6 MH |
240 | size_t num_header_extents_at_front; |
241 | size_t extent_size; /* Data extent size; default is 4096 */ | |
242 | size_t key_size; | |
243 | size_t extent_shift; | |
244 | unsigned int extent_mask; | |
245 | struct ecryptfs_mount_crypt_stat *mount_crypt_stat; | |
8bba066f | 246 | struct crypto_blkcipher *tfm; |
565d9724 MH |
247 | struct crypto_hash *hash_tfm; /* Crypto context for generating |
248 | * the initialization vectors */ | |
237fead6 MH |
249 | unsigned char cipher[ECRYPTFS_MAX_CIPHER_NAME_SIZE]; |
250 | unsigned char key[ECRYPTFS_MAX_KEY_BYTES]; | |
251 | unsigned char root_iv[ECRYPTFS_MAX_IV_BYTES]; | |
f4aad16a MH |
252 | struct list_head keysig_list; |
253 | struct mutex keysig_list_mutex; | |
237fead6 | 254 | struct mutex cs_tfm_mutex; |
565d9724 | 255 | struct mutex cs_hash_tfm_mutex; |
237fead6 MH |
256 | struct mutex cs_mutex; |
257 | }; | |
258 | ||
259 | /* inode private data. */ | |
260 | struct ecryptfs_inode_info { | |
261 | struct inode vfs_inode; | |
262 | struct inode *wii_inode; | |
da0102a1 MH |
263 | struct file *lower_file; |
264 | struct mutex lower_file_mutex; | |
237fead6 MH |
265 | struct ecryptfs_crypt_stat crypt_stat; |
266 | }; | |
267 | ||
268 | /* dentry private data. Each dentry must keep track of a lower | |
269 | * vfsmount too. */ | |
270 | struct ecryptfs_dentry_info { | |
b65d34fd | 271 | struct path lower_path; |
237fead6 MH |
272 | struct ecryptfs_crypt_stat *crypt_stat; |
273 | }; | |
274 | ||
6c6f57f3 | 275 | /** |
45eaab79 MH |
276 | * ecryptfs_global_auth_tok - A key used to encrypt all new files under the mountpoint |
277 | * @flags: Status flags | |
278 | * @mount_crypt_stat_list: These auth_toks hang off the mount-wide | |
279 | * cryptographic context. Every time a new | |
280 | * inode comes into existence, eCryptfs copies | |
281 | * the auth_toks on that list to the set of | |
282 | * auth_toks on the inode's crypt_stat | |
283 | * @global_auth_tok_key: The key from the user's keyring for the sig | |
284 | * @global_auth_tok: The key contents | |
285 | * @sig: The key identifier | |
286 | * | |
6c6f57f3 MH |
287 | * ecryptfs_global_auth_tok structs refer to authentication token keys |
288 | * in the user keyring that apply to newly created files. A list of | |
289 | * these objects hangs off of the mount_crypt_stat struct for any | |
290 | * given eCryptfs mount. This struct maintains a reference to both the | |
291 | * key contents and the key itself so that the key can be put on | |
292 | * unmount. | |
293 | */ | |
f4aad16a MH |
294 | struct ecryptfs_global_auth_tok { |
295 | #define ECRYPTFS_AUTH_TOK_INVALID 0x00000001 | |
296 | u32 flags; | |
45eaab79 MH |
297 | struct list_head mount_crypt_stat_list; |
298 | struct key *global_auth_tok_key; | |
299 | struct ecryptfs_auth_tok *global_auth_tok; | |
300 | unsigned char sig[ECRYPTFS_SIG_SIZE_HEX + 1]; | |
f4aad16a MH |
301 | }; |
302 | ||
6c6f57f3 | 303 | /** |
45eaab79 MH |
304 | * ecryptfs_key_tfm - Persistent key tfm |
305 | * @key_tfm: crypto API handle to the key | |
306 | * @key_size: Key size in bytes | |
307 | * @key_tfm_mutex: Mutex to ensure only one operation in eCryptfs is | |
308 | * using the persistent TFM at any point in time | |
309 | * @key_tfm_list: Handle to hang this off the module-wide TFM list | |
310 | * @cipher_name: String name for the cipher for this TFM | |
311 | * | |
6c6f57f3 MH |
312 | * Typically, eCryptfs will use the same ciphers repeatedly throughout |
313 | * the course of its operations. In order to avoid unnecessarily | |
314 | * destroying and initializing the same cipher repeatedly, eCryptfs | |
315 | * keeps a list of crypto API contexts around to use when needed. | |
316 | */ | |
f4aad16a MH |
317 | struct ecryptfs_key_tfm { |
318 | struct crypto_blkcipher *key_tfm; | |
319 | size_t key_size; | |
320 | struct mutex key_tfm_mutex; | |
45eaab79 | 321 | struct list_head key_tfm_list; |
f4aad16a MH |
322 | unsigned char cipher_name[ECRYPTFS_MAX_CIPHER_NAME_SIZE + 1]; |
323 | }; | |
324 | ||
325 | extern struct list_head key_tfm_list; | |
326 | extern struct mutex key_tfm_list_mutex; | |
327 | ||
237fead6 MH |
328 | /** |
329 | * This struct is to enable a mount-wide passphrase/salt combo. This | |
330 | * is more or less a stopgap to provide similar functionality to other | |
331 | * crypto filesystems like EncFS or CFS until full policy support is | |
332 | * implemented in eCryptfs. | |
333 | */ | |
334 | struct ecryptfs_mount_crypt_stat { | |
335 | /* Pointers to memory we do not own, do not free these */ | |
336 | #define ECRYPTFS_PLAINTEXT_PASSTHROUGH_ENABLED 0x00000001 | |
17398957 MH |
337 | #define ECRYPTFS_XATTR_METADATA_ENABLED 0x00000002 |
338 | #define ECRYPTFS_ENCRYPTED_VIEW_ENABLED 0x00000004 | |
f4aad16a | 339 | #define ECRYPTFS_MOUNT_CRYPT_STAT_INITIALIZED 0x00000008 |
237fead6 | 340 | u32 flags; |
f4aad16a MH |
341 | struct list_head global_auth_tok_list; |
342 | struct mutex global_auth_tok_list_mutex; | |
343 | size_t num_global_auth_toks; | |
237fead6 | 344 | size_t global_default_cipher_key_size; |
237fead6 MH |
345 | unsigned char global_default_cipher_name[ECRYPTFS_MAX_CIPHER_NAME_SIZE |
346 | + 1]; | |
237fead6 MH |
347 | }; |
348 | ||
349 | /* superblock private data. */ | |
350 | struct ecryptfs_sb_info { | |
351 | struct super_block *wsi_sb; | |
352 | struct ecryptfs_mount_crypt_stat mount_crypt_stat; | |
353 | }; | |
354 | ||
355 | /* file private data. */ | |
356 | struct ecryptfs_file_info { | |
357 | struct file *wfi_file; | |
358 | struct ecryptfs_crypt_stat *crypt_stat; | |
359 | }; | |
360 | ||
361 | /* auth_tok <=> encrypted_session_key mappings */ | |
362 | struct ecryptfs_auth_tok_list_item { | |
363 | unsigned char encrypted_session_key[ECRYPTFS_MAX_KEY_BYTES]; | |
364 | struct list_head list; | |
365 | struct ecryptfs_auth_tok auth_tok; | |
366 | }; | |
367 | ||
88b4a07e MH |
368 | struct ecryptfs_message { |
369 | u32 index; | |
370 | u32 data_len; | |
371 | u8 data[]; | |
372 | }; | |
373 | ||
374 | struct ecryptfs_msg_ctx { | |
375 | #define ECRYPTFS_MSG_CTX_STATE_FREE 0x0001 | |
376 | #define ECRYPTFS_MSG_CTX_STATE_PENDING 0x0002 | |
377 | #define ECRYPTFS_MSG_CTX_STATE_DONE 0x0003 | |
378 | u32 state; | |
379 | unsigned int index; | |
380 | unsigned int counter; | |
381 | struct ecryptfs_message *msg; | |
382 | struct task_struct *task; | |
383 | struct list_head node; | |
384 | struct mutex mux; | |
385 | }; | |
386 | ||
88b4a07e MH |
387 | extern unsigned int ecryptfs_transport; |
388 | ||
389 | struct ecryptfs_daemon_id { | |
390 | pid_t pid; | |
391 | uid_t uid; | |
392 | struct hlist_node id_chain; | |
393 | }; | |
394 | ||
237fead6 MH |
395 | static inline struct ecryptfs_file_info * |
396 | ecryptfs_file_to_private(struct file *file) | |
397 | { | |
398 | return (struct ecryptfs_file_info *)file->private_data; | |
399 | } | |
400 | ||
401 | static inline void | |
402 | ecryptfs_set_file_private(struct file *file, | |
403 | struct ecryptfs_file_info *file_info) | |
404 | { | |
405 | file->private_data = file_info; | |
406 | } | |
407 | ||
408 | static inline struct file *ecryptfs_file_to_lower(struct file *file) | |
409 | { | |
410 | return ((struct ecryptfs_file_info *)file->private_data)->wfi_file; | |
411 | } | |
412 | ||
413 | static inline void | |
414 | ecryptfs_set_file_lower(struct file *file, struct file *lower_file) | |
415 | { | |
416 | ((struct ecryptfs_file_info *)file->private_data)->wfi_file = | |
417 | lower_file; | |
418 | } | |
419 | ||
420 | static inline struct ecryptfs_inode_info * | |
421 | ecryptfs_inode_to_private(struct inode *inode) | |
422 | { | |
423 | return container_of(inode, struct ecryptfs_inode_info, vfs_inode); | |
424 | } | |
425 | ||
426 | static inline struct inode *ecryptfs_inode_to_lower(struct inode *inode) | |
427 | { | |
428 | return ecryptfs_inode_to_private(inode)->wii_inode; | |
429 | } | |
430 | ||
431 | static inline void | |
432 | ecryptfs_set_inode_lower(struct inode *inode, struct inode *lower_inode) | |
433 | { | |
434 | ecryptfs_inode_to_private(inode)->wii_inode = lower_inode; | |
435 | } | |
436 | ||
437 | static inline struct ecryptfs_sb_info * | |
438 | ecryptfs_superblock_to_private(struct super_block *sb) | |
439 | { | |
440 | return (struct ecryptfs_sb_info *)sb->s_fs_info; | |
441 | } | |
442 | ||
443 | static inline void | |
444 | ecryptfs_set_superblock_private(struct super_block *sb, | |
445 | struct ecryptfs_sb_info *sb_info) | |
446 | { | |
447 | sb->s_fs_info = sb_info; | |
448 | } | |
449 | ||
450 | static inline struct super_block * | |
451 | ecryptfs_superblock_to_lower(struct super_block *sb) | |
452 | { | |
453 | return ((struct ecryptfs_sb_info *)sb->s_fs_info)->wsi_sb; | |
454 | } | |
455 | ||
456 | static inline void | |
457 | ecryptfs_set_superblock_lower(struct super_block *sb, | |
458 | struct super_block *lower_sb) | |
459 | { | |
460 | ((struct ecryptfs_sb_info *)sb->s_fs_info)->wsi_sb = lower_sb; | |
461 | } | |
462 | ||
463 | static inline struct ecryptfs_dentry_info * | |
464 | ecryptfs_dentry_to_private(struct dentry *dentry) | |
465 | { | |
466 | return (struct ecryptfs_dentry_info *)dentry->d_fsdata; | |
467 | } | |
468 | ||
469 | static inline void | |
470 | ecryptfs_set_dentry_private(struct dentry *dentry, | |
471 | struct ecryptfs_dentry_info *dentry_info) | |
472 | { | |
473 | dentry->d_fsdata = dentry_info; | |
474 | } | |
475 | ||
476 | static inline struct dentry * | |
477 | ecryptfs_dentry_to_lower(struct dentry *dentry) | |
478 | { | |
b65d34fd | 479 | return ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.dentry; |
237fead6 MH |
480 | } |
481 | ||
482 | static inline void | |
483 | ecryptfs_set_dentry_lower(struct dentry *dentry, struct dentry *lower_dentry) | |
484 | { | |
b65d34fd | 485 | ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.dentry = |
237fead6 MH |
486 | lower_dentry; |
487 | } | |
488 | ||
489 | static inline struct vfsmount * | |
490 | ecryptfs_dentry_to_lower_mnt(struct dentry *dentry) | |
491 | { | |
b65d34fd | 492 | return ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.mnt; |
237fead6 MH |
493 | } |
494 | ||
495 | static inline void | |
496 | ecryptfs_set_dentry_lower_mnt(struct dentry *dentry, struct vfsmount *lower_mnt) | |
497 | { | |
b65d34fd | 498 | ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.mnt = |
237fead6 MH |
499 | lower_mnt; |
500 | } | |
501 | ||
502 | #define ecryptfs_printk(type, fmt, arg...) \ | |
503 | __ecryptfs_printk(type "%s: " fmt, __FUNCTION__, ## arg); | |
504 | void __ecryptfs_printk(const char *fmt, ...); | |
505 | ||
506 | extern const struct file_operations ecryptfs_main_fops; | |
507 | extern const struct file_operations ecryptfs_dir_fops; | |
754661f1 AV |
508 | extern const struct inode_operations ecryptfs_main_iops; |
509 | extern const struct inode_operations ecryptfs_dir_iops; | |
510 | extern const struct inode_operations ecryptfs_symlink_iops; | |
ee9b6d61 | 511 | extern const struct super_operations ecryptfs_sops; |
237fead6 MH |
512 | extern struct dentry_operations ecryptfs_dops; |
513 | extern struct address_space_operations ecryptfs_aops; | |
514 | extern int ecryptfs_verbosity; | |
88b4a07e MH |
515 | extern unsigned int ecryptfs_message_buf_len; |
516 | extern signed long ecryptfs_message_wait_timeout; | |
517 | extern unsigned int ecryptfs_number_of_users; | |
237fead6 MH |
518 | |
519 | extern struct kmem_cache *ecryptfs_auth_tok_list_item_cache; | |
520 | extern struct kmem_cache *ecryptfs_file_info_cache; | |
521 | extern struct kmem_cache *ecryptfs_dentry_info_cache; | |
522 | extern struct kmem_cache *ecryptfs_inode_info_cache; | |
523 | extern struct kmem_cache *ecryptfs_sb_info_cache; | |
524 | extern struct kmem_cache *ecryptfs_header_cache_0; | |
525 | extern struct kmem_cache *ecryptfs_header_cache_1; | |
526 | extern struct kmem_cache *ecryptfs_header_cache_2; | |
dd2a3b7a | 527 | extern struct kmem_cache *ecryptfs_xattr_cache; |
237fead6 | 528 | extern struct kmem_cache *ecryptfs_lower_page_cache; |
eb95e7ff | 529 | extern struct kmem_cache *ecryptfs_key_record_cache; |
f4aad16a MH |
530 | extern struct kmem_cache *ecryptfs_key_sig_cache; |
531 | extern struct kmem_cache *ecryptfs_global_auth_tok_cache; | |
532 | extern struct kmem_cache *ecryptfs_key_tfm_cache; | |
237fead6 MH |
533 | |
534 | int ecryptfs_interpose(struct dentry *hidden_dentry, | |
535 | struct dentry *this_dentry, struct super_block *sb, | |
536 | int flag); | |
537 | int ecryptfs_fill_zeros(struct file *file, loff_t new_length); | |
538 | int ecryptfs_decode_filename(struct ecryptfs_crypt_stat *crypt_stat, | |
539 | const char *name, int length, | |
540 | char **decrypted_name); | |
541 | int ecryptfs_encode_filename(struct ecryptfs_crypt_stat *crypt_stat, | |
542 | const char *name, int length, | |
543 | char **encoded_name); | |
544 | struct dentry *ecryptfs_lower_dentry(struct dentry *this_dentry); | |
237fead6 MH |
545 | void ecryptfs_dump_hex(char *data, int bytes); |
546 | int virt_to_scatterlist(const void *addr, int size, struct scatterlist *sg, | |
547 | int sg_size); | |
548 | int ecryptfs_compute_root_iv(struct ecryptfs_crypt_stat *crypt_stat); | |
549 | void ecryptfs_rotate_iv(unsigned char *iv); | |
550 | void ecryptfs_init_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat); | |
fcd12835 MH |
551 | void ecryptfs_destroy_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat); |
552 | void ecryptfs_destroy_mount_crypt_stat( | |
237fead6 MH |
553 | struct ecryptfs_mount_crypt_stat *mount_crypt_stat); |
554 | int ecryptfs_init_crypt_ctx(struct ecryptfs_crypt_stat *crypt_stat); | |
0216f7f7 | 555 | int ecryptfs_write_inode_size_to_metadata(struct inode *ecryptefs_inode); |
237fead6 MH |
556 | int ecryptfs_get_lower_page(struct page **lower_page, struct inode *lower_inode, |
557 | struct file *lower_file, | |
558 | unsigned long lower_page_index, int byte_offset, | |
559 | int region_bytes); | |
560 | int | |
561 | ecryptfs_commit_lower_page(struct page *lower_page, struct inode *lower_inode, | |
562 | struct file *lower_file, int byte_offset, | |
563 | int region_size); | |
564 | int ecryptfs_copy_page_to_lower(struct page *page, struct inode *lower_inode, | |
565 | struct file *lower_file); | |
566 | int ecryptfs_do_readpage(struct file *file, struct page *page, | |
567 | pgoff_t lower_page_index); | |
237fead6 MH |
568 | int ecryptfs_writepage_and_release_lower_page(struct page *lower_page, |
569 | struct inode *lower_inode, | |
570 | struct writeback_control *wbc); | |
0216f7f7 MH |
571 | int ecryptfs_encrypt_page(struct page *page); |
572 | int ecryptfs_decrypt_page(struct page *page); | |
dd2a3b7a MH |
573 | int ecryptfs_write_metadata(struct dentry *ecryptfs_dentry, |
574 | struct file *lower_file); | |
575 | int ecryptfs_read_metadata(struct dentry *ecryptfs_dentry, | |
237fead6 | 576 | struct file *lower_file); |
237fead6 | 577 | int ecryptfs_new_file_context(struct dentry *ecryptfs_dentry); |
dd2a3b7a MH |
578 | int ecryptfs_read_and_validate_header_region(char *data, struct dentry *dentry, |
579 | struct vfsmount *mnt); | |
580 | int ecryptfs_read_and_validate_xattr_region(char *page_virt, | |
581 | struct dentry *ecryptfs_dentry); | |
237fead6 MH |
582 | u16 ecryptfs_code_for_cipher_string(struct ecryptfs_crypt_stat *crypt_stat); |
583 | int ecryptfs_cipher_code_to_string(char *str, u16 cipher_code); | |
584 | void ecryptfs_set_default_sizes(struct ecryptfs_crypt_stat *crypt_stat); | |
585 | int ecryptfs_generate_key_packet_set(char *dest_base, | |
586 | struct ecryptfs_crypt_stat *crypt_stat, | |
587 | struct dentry *ecryptfs_dentry, | |
588 | size_t *len, size_t max); | |
237fead6 MH |
589 | int |
590 | ecryptfs_parse_packet_set(struct ecryptfs_crypt_stat *crypt_stat, | |
591 | unsigned char *src, struct dentry *ecryptfs_dentry); | |
592 | int ecryptfs_truncate(struct dentry *dentry, loff_t new_length); | |
237fead6 MH |
593 | int ecryptfs_inode_test(struct inode *inode, void *candidate_lower_inode); |
594 | int ecryptfs_inode_set(struct inode *inode, void *lower_inode); | |
595 | void ecryptfs_init_inode(struct inode *inode, struct inode *lower_inode); | |
7ff1d74f MH |
596 | int ecryptfs_open_lower_file(struct file **lower_file, |
597 | struct dentry *lower_dentry, | |
598 | struct vfsmount *lower_mnt, int flags); | |
599 | int ecryptfs_close_lower_file(struct file *lower_file); | |
dd2a3b7a MH |
600 | ssize_t ecryptfs_getxattr(struct dentry *dentry, const char *name, void *value, |
601 | size_t size); | |
602 | int | |
603 | ecryptfs_setxattr(struct dentry *dentry, const char *name, const void *value, | |
604 | size_t size, int flags); | |
e77a56dd | 605 | int ecryptfs_read_xattr_region(char *page_virt, struct dentry *ecryptfs_dentry); |
88b4a07e MH |
606 | int ecryptfs_process_helo(unsigned int transport, uid_t uid, pid_t pid); |
607 | int ecryptfs_process_quit(uid_t uid, pid_t pid); | |
dddfa461 MH |
608 | int ecryptfs_process_response(struct ecryptfs_message *msg, uid_t uid, |
609 | pid_t pid, u32 seq); | |
88b4a07e MH |
610 | int ecryptfs_send_message(unsigned int transport, char *data, int data_len, |
611 | struct ecryptfs_msg_ctx **msg_ctx); | |
612 | int ecryptfs_wait_for_response(struct ecryptfs_msg_ctx *msg_ctx, | |
613 | struct ecryptfs_message **emsg); | |
614 | int ecryptfs_init_messaging(unsigned int transport); | |
615 | void ecryptfs_release_messaging(unsigned int transport); | |
616 | ||
617 | int ecryptfs_send_netlink(char *data, int data_len, | |
618 | struct ecryptfs_msg_ctx *msg_ctx, u16 msg_type, | |
619 | u16 msg_flags, pid_t daemon_pid); | |
620 | int ecryptfs_init_netlink(void); | |
621 | void ecryptfs_release_netlink(void); | |
622 | ||
623 | int ecryptfs_send_connector(char *data, int data_len, | |
624 | struct ecryptfs_msg_ctx *msg_ctx, u16 msg_type, | |
625 | u16 msg_flags, pid_t daemon_pid); | |
626 | int ecryptfs_init_connector(void); | |
627 | void ecryptfs_release_connector(void); | |
e77a56dd MH |
628 | void |
629 | ecryptfs_write_header_metadata(char *virt, | |
630 | struct ecryptfs_crypt_stat *crypt_stat, | |
631 | size_t *written); | |
f4aad16a MH |
632 | int ecryptfs_add_keysig(struct ecryptfs_crypt_stat *crypt_stat, char *sig); |
633 | int | |
634 | ecryptfs_add_global_auth_tok(struct ecryptfs_mount_crypt_stat *mount_crypt_stat, | |
635 | char *sig); | |
636 | int ecryptfs_get_global_auth_tok_for_sig( | |
637 | struct ecryptfs_global_auth_tok **global_auth_tok, | |
638 | struct ecryptfs_mount_crypt_stat *mount_crypt_stat, char *sig); | |
639 | int | |
640 | ecryptfs_add_new_key_tfm(struct ecryptfs_key_tfm **key_tfm, char *cipher_name, | |
641 | size_t key_size); | |
642 | int ecryptfs_init_crypto(void); | |
fcd12835 | 643 | int ecryptfs_destroy_crypto(void); |
f4aad16a MH |
644 | int ecryptfs_get_tfm_and_mutex_for_cipher_name(struct crypto_blkcipher **tfm, |
645 | struct mutex **tfm_mutex, | |
646 | char *cipher_name); | |
647 | int ecryptfs_keyring_auth_tok_for_sig(struct key **auth_tok_key, | |
648 | struct ecryptfs_auth_tok **auth_tok, | |
649 | char *sig); | |
240e2df5 MH |
650 | int ecryptfs_write_zeros(struct file *file, pgoff_t index, int start, |
651 | int num_zeros); | |
0216f7f7 MH |
652 | void ecryptfs_lower_offset_for_extent(loff_t *offset, loff_t extent_num, |
653 | struct ecryptfs_crypt_stat *crypt_stat); | |
da0102a1 MH |
654 | int ecryptfs_write_lower(struct inode *ecryptfs_inode, char *data, |
655 | loff_t offset, size_t size); | |
656 | int ecryptfs_write_lower_page_segment(struct inode *ecryptfs_inode, | |
657 | struct page *page_for_lower, | |
658 | size_t offset_in_page, size_t size); | |
659 | int ecryptfs_write(struct file *ecryptfs_file, char *data, loff_t offset, | |
660 | size_t size); | |
661 | int ecryptfs_read_lower(char *data, loff_t offset, size_t size, | |
662 | struct inode *ecryptfs_inode); | |
663 | int ecryptfs_read_lower_page_segment(struct page *page_for_ecryptfs, | |
664 | pgoff_t page_index, | |
665 | size_t offset_in_page, size_t size, | |
666 | struct inode *ecryptfs_inode); | |
667 | int ecryptfs_read(char *data, loff_t offset, size_t size, | |
668 | struct file *ecryptfs_file); | |
669 | struct page *ecryptfs_get1page(struct file *file, loff_t index); | |
88b4a07e | 670 | |
237fead6 | 671 | #endif /* #ifndef ECRYPTFS_KERNEL_H */ |