2 * eCryptfs: Linux filesystem encryption layer
5 * Copyright (C) 1997-2003 Erez Zadok
6 * Copyright (C) 2001-2003 Stony Brook University
7 * Copyright (C) 2004-2006 International Business Machines Corp.
8 * Author(s): Michael A. Halcrow <mahalcro@us.ibm.com>
9 * Trevor S. Highland <trevor.highland@gmail.com>
10 * Tyler Hicks <tyhicks@ou.edu>
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.
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.
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
28 #ifndef ECRYPTFS_KERNEL_H
29 #define ECRYPTFS_KERNEL_H
31 #include <keys/user-type.h>
33 #include <linux/fs_stack.h>
34 #include <linux/namei.h>
35 #include <linux/scatterlist.h>
36 #include <linux/hash.h>
38 /* Version verification for shared data structures w/ userspace */
39 #define ECRYPTFS_VERSION_MAJOR 0x00
40 #define ECRYPTFS_VERSION_MINOR 0x04
41 #define ECRYPTFS_SUPPORTED_FILE_VERSION 0x02
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
46 #define ECRYPTFS_VERSIONING_PASSPHRASE 0x00000001
47 #define ECRYPTFS_VERSIONING_PUBKEY 0x00000002
48 #define ECRYPTFS_VERSIONING_PLAINTEXT_PASSTHROUGH 0x00000004
49 #define ECRYPTFS_VERSIONING_POLICY 0x00000008
50 #define ECRYPTFS_VERSIONING_XATTR 0x00000010
51 #define ECRYPTFS_VERSIONING_MASK (ECRYPTFS_VERSIONING_PASSPHRASE \
52 | ECRYPTFS_VERSIONING_PLAINTEXT_PASSTHROUGH \
53 | ECRYPTFS_VERSIONING_PUBKEY)
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
68 #define ECRYPTFS_FILE_VERSION 0x02
69 #define ECRYPTFS_DEFAULT_HEADER_EXTENT_SIZE 8192
70 #define ECRYPTFS_DEFAULT_EXTENT_SIZE 4096
71 #define ECRYPTFS_MINIMUM_HEADER_EXTENT_SIZE 8192
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
87 #define RFC2440_CIPHER_DES3_EDE 0x02
88 #define RFC2440_CIPHER_CAST_5 0x03
89 #define RFC2440_CIPHER_BLOWFISH 0x04
90 #define RFC2440_CIPHER_AES_128 0x07
91 #define RFC2440_CIPHER_AES_192 0x08
92 #define RFC2440_CIPHER_AES_256 0x09
93 #define RFC2440_CIPHER_TWOFISH 0x0a
94 #define RFC2440_CIPHER_CAST_6 0x0b
96 #define ECRYPTFS_SET_FLAG(flag_bit_vector, flag) (flag_bit_vector |= (flag))
97 #define ECRYPTFS_CLEAR_FLAG(flag_bit_vector, flag) (flag_bit_vector &= ~(flag))
98 #define ECRYPTFS_CHECK_FLAG(flag_bit_vector, flag) (flag_bit_vector & (flag))
99 #define RFC2440_CIPHER_RSA 0x01
102 * For convenience, we may need to pass around the encrypted session
103 * key between kernel and userspace because the authentication token
104 * may not be extractable. For example, the TPM may not release the
105 * private key, instead requiring the encrypted data and returning the
108 struct ecryptfs_session_key {
109 #define ECRYPTFS_USERSPACE_SHOULD_TRY_TO_DECRYPT 0x00000001
110 #define ECRYPTFS_USERSPACE_SHOULD_TRY_TO_ENCRYPT 0x00000002
111 #define ECRYPTFS_CONTAINS_DECRYPTED_KEY 0x00000004
112 #define ECRYPTFS_CONTAINS_ENCRYPTED_KEY 0x00000008
114 u32 encrypted_key_size;
115 u32 decrypted_key_size;
116 u8 encrypted_key[ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES];
117 u8 decrypted_key[ECRYPTFS_MAX_KEY_BYTES];
120 struct ecryptfs_password {
124 u32 session_key_encryption_key_bytes;
125 #define ECRYPTFS_PERSISTENT_PASSWORD 0x01
126 #define ECRYPTFS_SESSION_KEY_ENCRYPTION_KEY_SET 0x02
128 /* Iterated-hash concatenation of salt and passphrase */
129 u8 session_key_encryption_key[ECRYPTFS_MAX_KEY_BYTES];
130 u8 signature[ECRYPTFS_PASSWORD_SIG_SIZE + 1];
131 /* Always in expanded hex */
132 u8 salt[ECRYPTFS_SALT_SIZE];
135 enum ecryptfs_token_types {ECRYPTFS_PASSWORD, ECRYPTFS_PRIVATE_KEY};
137 struct ecryptfs_private_key {
140 u8 signature[ECRYPTFS_PASSWORD_SIG_SIZE + 1];
141 char pki_type[ECRYPTFS_MAX_PKI_NAME_BYTES + 1];
145 /* May be a password or a private key */
146 struct ecryptfs_auth_tok {
147 u16 version; /* 8-bit major and 8-bit minor */
150 struct ecryptfs_session_key session_key;
153 struct ecryptfs_password password;
154 struct ecryptfs_private_key private_key;
156 } __attribute__ ((packed));
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);
162 struct ecryptfs_key_record {
165 unsigned char sig[ECRYPTFS_SIG_SIZE];
166 unsigned char enc_key[ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES];
169 struct ecryptfs_auth_tok_list {
170 struct ecryptfs_auth_tok *auth_tok;
171 struct list_head list;
174 struct ecryptfs_crypt_stat;
175 struct ecryptfs_mount_crypt_stat;
177 struct ecryptfs_page_crypt_context {
179 #define ECRYPTFS_PREPARE_COMMIT_MODE 0
180 #define ECRYPTFS_WRITEPAGE_MODE 1
183 struct file *lower_file;
184 struct writeback_control *wbc;
188 static inline struct ecryptfs_auth_tok *
189 ecryptfs_get_key_payload_data(struct key *key)
191 return (struct ecryptfs_auth_tok *)
192 (((struct user_key_payload*)key->payload.data)->data);
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
199 #define ECRYPTFS_MAX_NUM_KEYSIGS 2 /* TODO: Make this a linked list */
200 #define ECRYPTFS_MAX_IV_BYTES 16 /* 128 bits */
201 #define ECRYPTFS_SALT_BYTES 2
202 #define MAGIC_ECRYPTFS_MARKER 0x3c81b7f5
203 #define MAGIC_ECRYPTFS_MARKER_SIZE_BYTES 8 /* 4*2 */
204 #define ECRYPTFS_FILE_SIZE_BYTES 8
205 #define ECRYPTFS_DEFAULT_CIPHER "aes"
206 #define ECRYPTFS_DEFAULT_KEY_BYTES 16
207 #define ECRYPTFS_DEFAULT_HASH "md5"
208 #define ECRYPTFS_TAG_1_PACKET_TYPE 0x01
209 #define ECRYPTFS_TAG_3_PACKET_TYPE 0x8C
210 #define ECRYPTFS_TAG_11_PACKET_TYPE 0xED
211 #define ECRYPTFS_TAG_64_PACKET_TYPE 0x40
212 #define ECRYPTFS_TAG_65_PACKET_TYPE 0x41
213 #define ECRYPTFS_TAG_66_PACKET_TYPE 0x42
214 #define ECRYPTFS_TAG_67_PACKET_TYPE 0x43
215 #define MD5_DIGEST_SIZE 16
218 * This is the primary struct associated with each encrypted file.
220 * TODO: cache align/pack?
222 struct ecryptfs_crypt_stat {
223 #define ECRYPTFS_STRUCT_INITIALIZED 0x00000001
224 #define ECRYPTFS_POLICY_APPLIED 0x00000002
225 #define ECRYPTFS_NEW_FILE 0x00000004
226 #define ECRYPTFS_ENCRYPTED 0x00000008
227 #define ECRYPTFS_SECURITY_WARNING 0x00000010
228 #define ECRYPTFS_ENABLE_HMAC 0x00000020
229 #define ECRYPTFS_ENCRYPT_IV_PAGES 0x00000040
230 #define ECRYPTFS_KEY_VALID 0x00000080
231 #define ECRYPTFS_METADATA_IN_XATTR 0x00000100
232 #define ECRYPTFS_VIEW_AS_ENCRYPTED 0x00000200
234 unsigned int file_version;
237 size_t header_extent_size;
238 size_t num_header_extents_at_front;
239 size_t extent_size; /* Data extent size; default is 4096 */
242 unsigned int extent_mask;
243 struct ecryptfs_mount_crypt_stat *mount_crypt_stat;
244 struct crypto_blkcipher *tfm;
245 struct crypto_hash *hash_tfm; /* Crypto context for generating
246 * the initialization vectors */
247 unsigned char cipher[ECRYPTFS_MAX_CIPHER_NAME_SIZE];
248 unsigned char key[ECRYPTFS_MAX_KEY_BYTES];
249 unsigned char root_iv[ECRYPTFS_MAX_IV_BYTES];
250 unsigned char keysigs[ECRYPTFS_MAX_NUM_KEYSIGS][ECRYPTFS_SIG_SIZE_HEX];
251 struct mutex cs_tfm_mutex;
252 struct mutex cs_hash_tfm_mutex;
253 struct mutex cs_mutex;
256 /* inode private data. */
257 struct ecryptfs_inode_info {
258 struct inode vfs_inode;
259 struct inode *wii_inode;
260 struct ecryptfs_crypt_stat crypt_stat;
263 /* dentry private data. Each dentry must keep track of a lower
265 struct ecryptfs_dentry_info {
266 struct path lower_path;
267 struct ecryptfs_crypt_stat *crypt_stat;
271 * This struct is to enable a mount-wide passphrase/salt combo. This
272 * is more or less a stopgap to provide similar functionality to other
273 * crypto filesystems like EncFS or CFS until full policy support is
274 * implemented in eCryptfs.
276 struct ecryptfs_mount_crypt_stat {
277 /* Pointers to memory we do not own, do not free these */
278 #define ECRYPTFS_PLAINTEXT_PASSTHROUGH_ENABLED 0x00000001
279 #define ECRYPTFS_XATTR_METADATA_ENABLED 0x00000002
280 #define ECRYPTFS_ENCRYPTED_VIEW_ENABLED 0x00000004
282 struct ecryptfs_auth_tok *global_auth_tok;
283 struct key *global_auth_tok_key;
284 size_t global_default_cipher_key_size;
285 struct crypto_blkcipher *global_key_tfm;
286 struct mutex global_key_tfm_mutex;
287 unsigned char global_default_cipher_name[ECRYPTFS_MAX_CIPHER_NAME_SIZE
289 unsigned char global_auth_tok_sig[ECRYPTFS_SIG_SIZE_HEX + 1];
292 /* superblock private data. */
293 struct ecryptfs_sb_info {
294 struct super_block *wsi_sb;
295 struct ecryptfs_mount_crypt_stat mount_crypt_stat;
298 /* file private data. */
299 struct ecryptfs_file_info {
300 struct file *wfi_file;
301 struct ecryptfs_crypt_stat *crypt_stat;
304 /* auth_tok <=> encrypted_session_key mappings */
305 struct ecryptfs_auth_tok_list_item {
306 unsigned char encrypted_session_key[ECRYPTFS_MAX_KEY_BYTES];
307 struct list_head list;
308 struct ecryptfs_auth_tok auth_tok;
311 struct ecryptfs_message {
317 struct ecryptfs_msg_ctx {
318 #define ECRYPTFS_MSG_CTX_STATE_FREE 0x0001
319 #define ECRYPTFS_MSG_CTX_STATE_PENDING 0x0002
320 #define ECRYPTFS_MSG_CTX_STATE_DONE 0x0003
323 unsigned int counter;
324 struct ecryptfs_message *msg;
325 struct task_struct *task;
326 struct list_head node;
330 extern struct list_head ecryptfs_msg_ctx_free_list;
331 extern struct list_head ecryptfs_msg_ctx_alloc_list;
332 extern struct mutex ecryptfs_msg_ctx_lists_mux;
334 #define ecryptfs_uid_hash(uid) \
335 hash_long((unsigned long)uid, ecryptfs_hash_buckets)
336 extern struct hlist_head *ecryptfs_daemon_id_hash;
337 extern struct mutex ecryptfs_daemon_id_hash_mux;
338 extern int ecryptfs_hash_buckets;
340 extern unsigned int ecryptfs_msg_counter;
341 extern struct ecryptfs_msg_ctx *ecryptfs_msg_ctx_arr;
342 extern unsigned int ecryptfs_transport;
344 struct ecryptfs_daemon_id {
347 struct hlist_node id_chain;
350 static inline struct ecryptfs_file_info *
351 ecryptfs_file_to_private(struct file *file)
353 return (struct ecryptfs_file_info *)file->private_data;
357 ecryptfs_set_file_private(struct file *file,
358 struct ecryptfs_file_info *file_info)
360 file->private_data = file_info;
363 static inline struct file *ecryptfs_file_to_lower(struct file *file)
365 return ((struct ecryptfs_file_info *)file->private_data)->wfi_file;
369 ecryptfs_set_file_lower(struct file *file, struct file *lower_file)
371 ((struct ecryptfs_file_info *)file->private_data)->wfi_file =
375 static inline struct ecryptfs_inode_info *
376 ecryptfs_inode_to_private(struct inode *inode)
378 return container_of(inode, struct ecryptfs_inode_info, vfs_inode);
381 static inline struct inode *ecryptfs_inode_to_lower(struct inode *inode)
383 return ecryptfs_inode_to_private(inode)->wii_inode;
387 ecryptfs_set_inode_lower(struct inode *inode, struct inode *lower_inode)
389 ecryptfs_inode_to_private(inode)->wii_inode = lower_inode;
392 static inline struct ecryptfs_sb_info *
393 ecryptfs_superblock_to_private(struct super_block *sb)
395 return (struct ecryptfs_sb_info *)sb->s_fs_info;
399 ecryptfs_set_superblock_private(struct super_block *sb,
400 struct ecryptfs_sb_info *sb_info)
402 sb->s_fs_info = sb_info;
405 static inline struct super_block *
406 ecryptfs_superblock_to_lower(struct super_block *sb)
408 return ((struct ecryptfs_sb_info *)sb->s_fs_info)->wsi_sb;
412 ecryptfs_set_superblock_lower(struct super_block *sb,
413 struct super_block *lower_sb)
415 ((struct ecryptfs_sb_info *)sb->s_fs_info)->wsi_sb = lower_sb;
418 static inline struct ecryptfs_dentry_info *
419 ecryptfs_dentry_to_private(struct dentry *dentry)
421 return (struct ecryptfs_dentry_info *)dentry->d_fsdata;
425 ecryptfs_set_dentry_private(struct dentry *dentry,
426 struct ecryptfs_dentry_info *dentry_info)
428 dentry->d_fsdata = dentry_info;
431 static inline struct dentry *
432 ecryptfs_dentry_to_lower(struct dentry *dentry)
434 return ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.dentry;
438 ecryptfs_set_dentry_lower(struct dentry *dentry, struct dentry *lower_dentry)
440 ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.dentry =
444 static inline struct vfsmount *
445 ecryptfs_dentry_to_lower_mnt(struct dentry *dentry)
447 return ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.mnt;
451 ecryptfs_set_dentry_lower_mnt(struct dentry *dentry, struct vfsmount *lower_mnt)
453 ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.mnt =
457 #define ecryptfs_printk(type, fmt, arg...) \
458 __ecryptfs_printk(type "%s: " fmt, __FUNCTION__, ## arg);
459 void __ecryptfs_printk(const char *fmt, ...);
461 extern const struct file_operations ecryptfs_main_fops;
462 extern const struct file_operations ecryptfs_dir_fops;
463 extern struct inode_operations ecryptfs_main_iops;
464 extern struct inode_operations ecryptfs_dir_iops;
465 extern struct inode_operations ecryptfs_symlink_iops;
466 extern struct super_operations ecryptfs_sops;
467 extern struct dentry_operations ecryptfs_dops;
468 extern struct address_space_operations ecryptfs_aops;
469 extern int ecryptfs_verbosity;
470 extern unsigned int ecryptfs_message_buf_len;
471 extern signed long ecryptfs_message_wait_timeout;
472 extern unsigned int ecryptfs_number_of_users;
474 extern struct kmem_cache *ecryptfs_auth_tok_list_item_cache;
475 extern struct kmem_cache *ecryptfs_file_info_cache;
476 extern struct kmem_cache *ecryptfs_dentry_info_cache;
477 extern struct kmem_cache *ecryptfs_inode_info_cache;
478 extern struct kmem_cache *ecryptfs_sb_info_cache;
479 extern struct kmem_cache *ecryptfs_header_cache_0;
480 extern struct kmem_cache *ecryptfs_header_cache_1;
481 extern struct kmem_cache *ecryptfs_header_cache_2;
482 extern struct kmem_cache *ecryptfs_lower_page_cache;
484 int ecryptfs_interpose(struct dentry *hidden_dentry,
485 struct dentry *this_dentry, struct super_block *sb,
487 int ecryptfs_fill_zeros(struct file *file, loff_t new_length);
488 int ecryptfs_decode_filename(struct ecryptfs_crypt_stat *crypt_stat,
489 const char *name, int length,
490 char **decrypted_name);
491 int ecryptfs_encode_filename(struct ecryptfs_crypt_stat *crypt_stat,
492 const char *name, int length,
493 char **encoded_name);
494 struct dentry *ecryptfs_lower_dentry(struct dentry *this_dentry);
495 void ecryptfs_dump_hex(char *data, int bytes);
496 int virt_to_scatterlist(const void *addr, int size, struct scatterlist *sg,
498 int ecryptfs_compute_root_iv(struct ecryptfs_crypt_stat *crypt_stat);
499 void ecryptfs_rotate_iv(unsigned char *iv);
500 void ecryptfs_init_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat);
501 void ecryptfs_destruct_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat);
502 void ecryptfs_destruct_mount_crypt_stat(
503 struct ecryptfs_mount_crypt_stat *mount_crypt_stat);
504 int ecryptfs_init_crypt_ctx(struct ecryptfs_crypt_stat *crypt_stat);
505 int ecryptfs_crypto_api_algify_cipher_name(char **algified_name,
507 char *chaining_modifier);
508 int ecryptfs_write_inode_size_to_header(struct file *lower_file,
509 struct inode *lower_inode,
510 struct inode *inode);
511 int ecryptfs_get_lower_page(struct page **lower_page, struct inode *lower_inode,
512 struct file *lower_file,
513 unsigned long lower_page_index, int byte_offset,
516 ecryptfs_commit_lower_page(struct page *lower_page, struct inode *lower_inode,
517 struct file *lower_file, int byte_offset,
519 int ecryptfs_copy_page_to_lower(struct page *page, struct inode *lower_inode,
520 struct file *lower_file);
521 int ecryptfs_do_readpage(struct file *file, struct page *page,
522 pgoff_t lower_page_index);
523 int ecryptfs_grab_and_map_lower_page(struct page **lower_page,
525 struct inode *lower_inode,
526 unsigned long lower_page_index);
527 int ecryptfs_writepage_and_release_lower_page(struct page *lower_page,
528 struct inode *lower_inode,
529 struct writeback_control *wbc);
530 int ecryptfs_encrypt_page(struct ecryptfs_page_crypt_context *ctx);
531 int ecryptfs_decrypt_page(struct file *file, struct page *page);
532 int ecryptfs_write_headers(struct dentry *ecryptfs_dentry,
533 struct file *lower_file);
534 int ecryptfs_write_headers_virt(char *page_virt,
535 struct ecryptfs_crypt_stat *crypt_stat,
536 struct dentry *ecryptfs_dentry);
537 int ecryptfs_read_headers(struct dentry *ecryptfs_dentry,
538 struct file *lower_file);
539 int ecryptfs_new_file_context(struct dentry *ecryptfs_dentry);
540 int contains_ecryptfs_marker(char *data);
541 int ecryptfs_read_header_region(char *data, struct dentry *dentry,
542 struct vfsmount *mnt);
543 u16 ecryptfs_code_for_cipher_string(struct ecryptfs_crypt_stat *crypt_stat);
544 int ecryptfs_cipher_code_to_string(char *str, u16 cipher_code);
545 void ecryptfs_set_default_sizes(struct ecryptfs_crypt_stat *crypt_stat);
546 int ecryptfs_generate_key_packet_set(char *dest_base,
547 struct ecryptfs_crypt_stat *crypt_stat,
548 struct dentry *ecryptfs_dentry,
549 size_t *len, size_t max);
550 int process_request_key_err(long err_code);
552 ecryptfs_parse_packet_set(struct ecryptfs_crypt_stat *crypt_stat,
553 unsigned char *src, struct dentry *ecryptfs_dentry);
554 int ecryptfs_truncate(struct dentry *dentry, loff_t new_length);
556 ecryptfs_process_cipher(struct crypto_blkcipher **key_tfm, char *cipher_name,
558 int ecryptfs_inode_test(struct inode *inode, void *candidate_lower_inode);
559 int ecryptfs_inode_set(struct inode *inode, void *lower_inode);
560 void ecryptfs_init_inode(struct inode *inode, struct inode *lower_inode);
561 int ecryptfs_open_lower_file(struct file **lower_file,
562 struct dentry *lower_dentry,
563 struct vfsmount *lower_mnt, int flags);
564 int ecryptfs_close_lower_file(struct file *lower_file);
566 int ecryptfs_process_helo(unsigned int transport, uid_t uid, pid_t pid);
567 int ecryptfs_process_quit(uid_t uid, pid_t pid);
568 int ecryptfs_process_response(struct ecryptfs_message *msg, uid_t uid,
570 int ecryptfs_send_message(unsigned int transport, char *data, int data_len,
571 struct ecryptfs_msg_ctx **msg_ctx);
572 int ecryptfs_wait_for_response(struct ecryptfs_msg_ctx *msg_ctx,
573 struct ecryptfs_message **emsg);
574 int ecryptfs_init_messaging(unsigned int transport);
575 void ecryptfs_release_messaging(unsigned int transport);
577 int ecryptfs_send_netlink(char *data, int data_len,
578 struct ecryptfs_msg_ctx *msg_ctx, u16 msg_type,
579 u16 msg_flags, pid_t daemon_pid);
580 int ecryptfs_init_netlink(void);
581 void ecryptfs_release_netlink(void);
583 int ecryptfs_send_connector(char *data, int data_len,
584 struct ecryptfs_msg_ctx *msg_ctx, u16 msg_type,
585 u16 msg_flags, pid_t daemon_pid);
586 int ecryptfs_init_connector(void);
587 void ecryptfs_release_connector(void);
590 #endif /* #ifndef ECRYPTFS_KERNEL_H */