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_MASK (ECRYPTFS_VERSIONING_PASSPHRASE \
51 | ECRYPTFS_VERSIONING_PLAINTEXT_PASSTHROUGH \
52 | ECRYPTFS_VERSIONING_PUBKEY)
54 #define ECRYPTFS_MAX_PASSWORD_LENGTH 64
55 #define ECRYPTFS_MAX_PASSPHRASE_BYTES ECRYPTFS_MAX_PASSWORD_LENGTH
56 #define ECRYPTFS_SALT_SIZE 8
57 #define ECRYPTFS_SALT_SIZE_HEX (ECRYPTFS_SALT_SIZE*2)
58 /* The original signature size is only for what is stored on disk; all
59 * in-memory representations are expanded hex, so it better adapted to
60 * be passed around or referenced on the command line */
61 #define ECRYPTFS_SIG_SIZE 8
62 #define ECRYPTFS_SIG_SIZE_HEX (ECRYPTFS_SIG_SIZE*2)
63 #define ECRYPTFS_PASSWORD_SIG_SIZE ECRYPTFS_SIG_SIZE_HEX
64 #define ECRYPTFS_MAX_KEY_BYTES 64
65 #define ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES 512
66 #define ECRYPTFS_DEFAULT_IV_BYTES 16
67 #define ECRYPTFS_FILE_VERSION 0x02
68 #define ECRYPTFS_DEFAULT_HEADER_EXTENT_SIZE 8192
69 #define ECRYPTFS_DEFAULT_EXTENT_SIZE 4096
70 #define ECRYPTFS_MINIMUM_HEADER_EXTENT_SIZE 8192
71 #define ECRYPTFS_DEFAULT_MSG_CTX_ELEMS 32
72 #define ECRYPTFS_DEFAULT_SEND_TIMEOUT HZ
73 #define ECRYPTFS_MAX_MSG_CTX_TTL (HZ*3)
74 #define ECRYPTFS_NLMSG_HELO 100
75 #define ECRYPTFS_NLMSG_QUIT 101
76 #define ECRYPTFS_NLMSG_REQUEST 102
77 #define ECRYPTFS_NLMSG_RESPONSE 103
78 #define ECRYPTFS_MAX_PKI_NAME_BYTES 16
79 #define ECRYPTFS_DEFAULT_NUM_USERS 4
80 #define ECRYPTFS_MAX_NUM_USERS 32768
81 #define ECRYPTFS_TRANSPORT_NETLINK 0
82 #define ECRYPTFS_TRANSPORT_CONNECTOR 1
83 #define ECRYPTFS_TRANSPORT_RELAYFS 2
84 #define ECRYPTFS_DEFAULT_TRANSPORT ECRYPTFS_TRANSPORT_NETLINK
86 #define RFC2440_CIPHER_DES3_EDE 0x02
87 #define RFC2440_CIPHER_CAST_5 0x03
88 #define RFC2440_CIPHER_BLOWFISH 0x04
89 #define RFC2440_CIPHER_AES_128 0x07
90 #define RFC2440_CIPHER_AES_192 0x08
91 #define RFC2440_CIPHER_AES_256 0x09
92 #define RFC2440_CIPHER_TWOFISH 0x0a
93 #define RFC2440_CIPHER_CAST_6 0x0b
95 #define ECRYPTFS_SET_FLAG(flag_bit_vector, flag) (flag_bit_vector |= (flag))
96 #define ECRYPTFS_CLEAR_FLAG(flag_bit_vector, flag) (flag_bit_vector &= ~(flag))
97 #define ECRYPTFS_CHECK_FLAG(flag_bit_vector, flag) (flag_bit_vector & (flag))
98 #define RFC2440_CIPHER_RSA 0x01
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
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
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];
119 struct ecryptfs_password {
123 u32 session_key_encryption_key_bytes;
124 #define ECRYPTFS_PERSISTENT_PASSWORD 0x01
125 #define ECRYPTFS_SESSION_KEY_ENCRYPTION_KEY_SET 0x02
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];
134 enum ecryptfs_token_types {ECRYPTFS_PASSWORD, ECRYPTFS_PRIVATE_KEY};
136 struct ecryptfs_private_key {
139 u8 signature[ECRYPTFS_PASSWORD_SIG_SIZE + 1];
140 char pki_type[ECRYPTFS_MAX_PKI_NAME_BYTES + 1];
144 /* May be a password or a private key */
145 struct ecryptfs_auth_tok {
146 u16 version; /* 8-bit major and 8-bit minor */
149 struct ecryptfs_session_key session_key;
152 struct ecryptfs_password password;
153 struct ecryptfs_private_key private_key;
155 } __attribute__ ((packed));
157 void ecryptfs_dump_auth_tok(struct ecryptfs_auth_tok *auth_tok);
158 extern void ecryptfs_to_hex(char *dst, char *src, size_t src_size);
159 extern void ecryptfs_from_hex(char *dst, char *src, int dst_size);
161 struct ecryptfs_key_record {
164 unsigned char sig[ECRYPTFS_SIG_SIZE];
165 unsigned char enc_key[ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES];
168 struct ecryptfs_auth_tok_list {
169 struct ecryptfs_auth_tok *auth_tok;
170 struct list_head list;
173 struct ecryptfs_crypt_stat;
174 struct ecryptfs_mount_crypt_stat;
176 struct ecryptfs_page_crypt_context {
178 #define ECRYPTFS_PREPARE_COMMIT_MODE 0
179 #define ECRYPTFS_WRITEPAGE_MODE 1
182 struct file *lower_file;
183 struct writeback_control *wbc;
187 static inline struct ecryptfs_auth_tok *
188 ecryptfs_get_key_payload_data(struct key *key)
190 return (struct ecryptfs_auth_tok *)
191 (((struct user_key_payload*)key->payload.data)->data);
194 #define ECRYPTFS_SUPER_MAGIC 0xf15f
195 #define ECRYPTFS_MAX_KEYSET_SIZE 1024
196 #define ECRYPTFS_MAX_CIPHER_NAME_SIZE 32
197 #define ECRYPTFS_MAX_NUM_ENC_KEYS 64
198 #define ECRYPTFS_MAX_NUM_KEYSIGS 2 /* TODO: Make this a linked list */
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 */
203 #define ECRYPTFS_FILE_SIZE_BYTES 8
204 #define ECRYPTFS_DEFAULT_CIPHER "aes"
205 #define ECRYPTFS_DEFAULT_KEY_BYTES 16
206 #define ECRYPTFS_DEFAULT_HASH "md5"
207 #define ECRYPTFS_TAG_1_PACKET_TYPE 0x01
208 #define ECRYPTFS_TAG_3_PACKET_TYPE 0x8C
209 #define ECRYPTFS_TAG_11_PACKET_TYPE 0xED
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
214 #define MD5_DIGEST_SIZE 16
217 * This is the primary struct associated with each encrypted file.
219 * TODO: cache align/pack?
221 struct ecryptfs_crypt_stat {
222 #define ECRYPTFS_STRUCT_INITIALIZED 0x00000001
223 #define ECRYPTFS_POLICY_APPLIED 0x00000002
224 #define ECRYPTFS_NEW_FILE 0x00000004
225 #define ECRYPTFS_ENCRYPTED 0x00000008
226 #define ECRYPTFS_SECURITY_WARNING 0x00000010
227 #define ECRYPTFS_ENABLE_HMAC 0x00000020
228 #define ECRYPTFS_ENCRYPT_IV_PAGES 0x00000040
229 #define ECRYPTFS_KEY_VALID 0x00000080
231 unsigned int file_version;
234 size_t header_extent_size;
235 size_t num_header_extents_at_front;
236 size_t extent_size; /* Data extent size; default is 4096 */
239 unsigned int extent_mask;
240 struct ecryptfs_mount_crypt_stat *mount_crypt_stat;
241 struct crypto_blkcipher *tfm;
242 struct crypto_hash *hash_tfm; /* Crypto context for generating
243 * the initialization vectors */
244 unsigned char cipher[ECRYPTFS_MAX_CIPHER_NAME_SIZE];
245 unsigned char key[ECRYPTFS_MAX_KEY_BYTES];
246 unsigned char root_iv[ECRYPTFS_MAX_IV_BYTES];
247 unsigned char keysigs[ECRYPTFS_MAX_NUM_KEYSIGS][ECRYPTFS_SIG_SIZE_HEX];
248 struct mutex cs_tfm_mutex;
249 struct mutex cs_hash_tfm_mutex;
250 struct mutex cs_mutex;
253 /* inode private data. */
254 struct ecryptfs_inode_info {
255 struct inode vfs_inode;
256 struct inode *wii_inode;
257 struct ecryptfs_crypt_stat crypt_stat;
260 /* dentry private data. Each dentry must keep track of a lower
262 struct ecryptfs_dentry_info {
263 struct path lower_path;
264 struct ecryptfs_crypt_stat *crypt_stat;
268 * This struct is to enable a mount-wide passphrase/salt combo. This
269 * is more or less a stopgap to provide similar functionality to other
270 * crypto filesystems like EncFS or CFS until full policy support is
271 * implemented in eCryptfs.
273 struct ecryptfs_mount_crypt_stat {
274 /* Pointers to memory we do not own, do not free these */
275 #define ECRYPTFS_PLAINTEXT_PASSTHROUGH_ENABLED 0x00000001
277 struct ecryptfs_auth_tok *global_auth_tok;
278 struct key *global_auth_tok_key;
279 size_t global_default_cipher_key_size;
280 struct crypto_blkcipher *global_key_tfm;
281 struct mutex global_key_tfm_mutex;
282 unsigned char global_default_cipher_name[ECRYPTFS_MAX_CIPHER_NAME_SIZE
284 unsigned char global_auth_tok_sig[ECRYPTFS_SIG_SIZE_HEX + 1];
287 /* superblock private data. */
288 struct ecryptfs_sb_info {
289 struct super_block *wsi_sb;
290 struct ecryptfs_mount_crypt_stat mount_crypt_stat;
293 /* file private data. */
294 struct ecryptfs_file_info {
295 struct file *wfi_file;
296 struct ecryptfs_crypt_stat *crypt_stat;
299 /* auth_tok <=> encrypted_session_key mappings */
300 struct ecryptfs_auth_tok_list_item {
301 unsigned char encrypted_session_key[ECRYPTFS_MAX_KEY_BYTES];
302 struct list_head list;
303 struct ecryptfs_auth_tok auth_tok;
306 struct ecryptfs_message {
312 struct ecryptfs_msg_ctx {
313 #define ECRYPTFS_MSG_CTX_STATE_FREE 0x0001
314 #define ECRYPTFS_MSG_CTX_STATE_PENDING 0x0002
315 #define ECRYPTFS_MSG_CTX_STATE_DONE 0x0003
318 unsigned int counter;
319 struct ecryptfs_message *msg;
320 struct task_struct *task;
321 struct list_head node;
325 extern struct list_head ecryptfs_msg_ctx_free_list;
326 extern struct list_head ecryptfs_msg_ctx_alloc_list;
327 extern struct mutex ecryptfs_msg_ctx_lists_mux;
329 #define ecryptfs_uid_hash(uid) \
330 hash_long((unsigned long)uid, ecryptfs_hash_buckets)
331 extern struct hlist_head *ecryptfs_daemon_id_hash;
332 extern struct mutex ecryptfs_daemon_id_hash_mux;
333 extern int ecryptfs_hash_buckets;
335 extern unsigned int ecryptfs_msg_counter;
336 extern struct ecryptfs_msg_ctx *ecryptfs_msg_ctx_arr;
337 extern unsigned int ecryptfs_transport;
339 struct ecryptfs_daemon_id {
342 struct hlist_node id_chain;
345 static inline struct ecryptfs_file_info *
346 ecryptfs_file_to_private(struct file *file)
348 return (struct ecryptfs_file_info *)file->private_data;
352 ecryptfs_set_file_private(struct file *file,
353 struct ecryptfs_file_info *file_info)
355 file->private_data = file_info;
358 static inline struct file *ecryptfs_file_to_lower(struct file *file)
360 return ((struct ecryptfs_file_info *)file->private_data)->wfi_file;
364 ecryptfs_set_file_lower(struct file *file, struct file *lower_file)
366 ((struct ecryptfs_file_info *)file->private_data)->wfi_file =
370 static inline struct ecryptfs_inode_info *
371 ecryptfs_inode_to_private(struct inode *inode)
373 return container_of(inode, struct ecryptfs_inode_info, vfs_inode);
376 static inline struct inode *ecryptfs_inode_to_lower(struct inode *inode)
378 return ecryptfs_inode_to_private(inode)->wii_inode;
382 ecryptfs_set_inode_lower(struct inode *inode, struct inode *lower_inode)
384 ecryptfs_inode_to_private(inode)->wii_inode = lower_inode;
387 static inline struct ecryptfs_sb_info *
388 ecryptfs_superblock_to_private(struct super_block *sb)
390 return (struct ecryptfs_sb_info *)sb->s_fs_info;
394 ecryptfs_set_superblock_private(struct super_block *sb,
395 struct ecryptfs_sb_info *sb_info)
397 sb->s_fs_info = sb_info;
400 static inline struct super_block *
401 ecryptfs_superblock_to_lower(struct super_block *sb)
403 return ((struct ecryptfs_sb_info *)sb->s_fs_info)->wsi_sb;
407 ecryptfs_set_superblock_lower(struct super_block *sb,
408 struct super_block *lower_sb)
410 ((struct ecryptfs_sb_info *)sb->s_fs_info)->wsi_sb = lower_sb;
413 static inline struct ecryptfs_dentry_info *
414 ecryptfs_dentry_to_private(struct dentry *dentry)
416 return (struct ecryptfs_dentry_info *)dentry->d_fsdata;
420 ecryptfs_set_dentry_private(struct dentry *dentry,
421 struct ecryptfs_dentry_info *dentry_info)
423 dentry->d_fsdata = dentry_info;
426 static inline struct dentry *
427 ecryptfs_dentry_to_lower(struct dentry *dentry)
429 return ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.dentry;
433 ecryptfs_set_dentry_lower(struct dentry *dentry, struct dentry *lower_dentry)
435 ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.dentry =
439 static inline struct vfsmount *
440 ecryptfs_dentry_to_lower_mnt(struct dentry *dentry)
442 return ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.mnt;
446 ecryptfs_set_dentry_lower_mnt(struct dentry *dentry, struct vfsmount *lower_mnt)
448 ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.mnt =
452 #define ecryptfs_printk(type, fmt, arg...) \
453 __ecryptfs_printk(type "%s: " fmt, __FUNCTION__, ## arg);
454 void __ecryptfs_printk(const char *fmt, ...);
456 extern const struct file_operations ecryptfs_main_fops;
457 extern const struct file_operations ecryptfs_dir_fops;
458 extern struct inode_operations ecryptfs_main_iops;
459 extern struct inode_operations ecryptfs_dir_iops;
460 extern struct inode_operations ecryptfs_symlink_iops;
461 extern struct super_operations ecryptfs_sops;
462 extern struct dentry_operations ecryptfs_dops;
463 extern struct address_space_operations ecryptfs_aops;
464 extern int ecryptfs_verbosity;
465 extern unsigned int ecryptfs_message_buf_len;
466 extern signed long ecryptfs_message_wait_timeout;
467 extern unsigned int ecryptfs_number_of_users;
469 extern struct kmem_cache *ecryptfs_auth_tok_list_item_cache;
470 extern struct kmem_cache *ecryptfs_file_info_cache;
471 extern struct kmem_cache *ecryptfs_dentry_info_cache;
472 extern struct kmem_cache *ecryptfs_inode_info_cache;
473 extern struct kmem_cache *ecryptfs_sb_info_cache;
474 extern struct kmem_cache *ecryptfs_header_cache_0;
475 extern struct kmem_cache *ecryptfs_header_cache_1;
476 extern struct kmem_cache *ecryptfs_header_cache_2;
477 extern struct kmem_cache *ecryptfs_lower_page_cache;
479 int ecryptfs_interpose(struct dentry *hidden_dentry,
480 struct dentry *this_dentry, struct super_block *sb,
482 int ecryptfs_fill_zeros(struct file *file, loff_t new_length);
483 int ecryptfs_decode_filename(struct ecryptfs_crypt_stat *crypt_stat,
484 const char *name, int length,
485 char **decrypted_name);
486 int ecryptfs_encode_filename(struct ecryptfs_crypt_stat *crypt_stat,
487 const char *name, int length,
488 char **encoded_name);
489 struct dentry *ecryptfs_lower_dentry(struct dentry *this_dentry);
490 void ecryptfs_dump_hex(char *data, int bytes);
491 int virt_to_scatterlist(const void *addr, int size, struct scatterlist *sg,
493 int ecryptfs_compute_root_iv(struct ecryptfs_crypt_stat *crypt_stat);
494 void ecryptfs_rotate_iv(unsigned char *iv);
495 void ecryptfs_init_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat);
496 void ecryptfs_destruct_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat);
497 void ecryptfs_destruct_mount_crypt_stat(
498 struct ecryptfs_mount_crypt_stat *mount_crypt_stat);
499 int ecryptfs_init_crypt_ctx(struct ecryptfs_crypt_stat *crypt_stat);
500 int ecryptfs_crypto_api_algify_cipher_name(char **algified_name,
502 char *chaining_modifier);
503 int ecryptfs_write_inode_size_to_header(struct file *lower_file,
504 struct inode *lower_inode,
505 struct inode *inode);
506 int ecryptfs_get_lower_page(struct page **lower_page, struct inode *lower_inode,
507 struct file *lower_file,
508 unsigned long lower_page_index, int byte_offset,
511 ecryptfs_commit_lower_page(struct page *lower_page, struct inode *lower_inode,
512 struct file *lower_file, int byte_offset,
514 int ecryptfs_copy_page_to_lower(struct page *page, struct inode *lower_inode,
515 struct file *lower_file);
516 int ecryptfs_do_readpage(struct file *file, struct page *page,
517 pgoff_t lower_page_index);
518 int ecryptfs_grab_and_map_lower_page(struct page **lower_page,
520 struct inode *lower_inode,
521 unsigned long lower_page_index);
522 int ecryptfs_writepage_and_release_lower_page(struct page *lower_page,
523 struct inode *lower_inode,
524 struct writeback_control *wbc);
525 int ecryptfs_encrypt_page(struct ecryptfs_page_crypt_context *ctx);
526 int ecryptfs_decrypt_page(struct file *file, struct page *page);
527 int ecryptfs_write_headers(struct dentry *ecryptfs_dentry,
528 struct file *lower_file);
529 int ecryptfs_write_headers_virt(char *page_virt,
530 struct ecryptfs_crypt_stat *crypt_stat,
531 struct dentry *ecryptfs_dentry);
532 int ecryptfs_read_headers(struct dentry *ecryptfs_dentry,
533 struct file *lower_file);
534 int ecryptfs_new_file_context(struct dentry *ecryptfs_dentry);
535 int contains_ecryptfs_marker(char *data);
536 int ecryptfs_read_header_region(char *data, struct dentry *dentry,
537 struct vfsmount *mnt);
538 u16 ecryptfs_code_for_cipher_string(struct ecryptfs_crypt_stat *crypt_stat);
539 int ecryptfs_cipher_code_to_string(char *str, u16 cipher_code);
540 void ecryptfs_set_default_sizes(struct ecryptfs_crypt_stat *crypt_stat);
541 int ecryptfs_generate_key_packet_set(char *dest_base,
542 struct ecryptfs_crypt_stat *crypt_stat,
543 struct dentry *ecryptfs_dentry,
544 size_t *len, size_t max);
545 int process_request_key_err(long err_code);
547 ecryptfs_parse_packet_set(struct ecryptfs_crypt_stat *crypt_stat,
548 unsigned char *src, struct dentry *ecryptfs_dentry);
549 int ecryptfs_truncate(struct dentry *dentry, loff_t new_length);
551 ecryptfs_process_cipher(struct crypto_blkcipher **key_tfm, char *cipher_name,
553 int ecryptfs_inode_test(struct inode *inode, void *candidate_lower_inode);
554 int ecryptfs_inode_set(struct inode *inode, void *lower_inode);
555 void ecryptfs_init_inode(struct inode *inode, struct inode *lower_inode);
556 int ecryptfs_open_lower_file(struct file **lower_file,
557 struct dentry *lower_dentry,
558 struct vfsmount *lower_mnt, int flags);
559 int ecryptfs_close_lower_file(struct file *lower_file);
561 int ecryptfs_process_helo(unsigned int transport, uid_t uid, pid_t pid);
562 int ecryptfs_process_quit(uid_t uid, pid_t pid);
563 int ecryptfs_process_response(struct ecryptfs_message *msg, uid_t uid,
565 int ecryptfs_send_message(unsigned int transport, char *data, int data_len,
566 struct ecryptfs_msg_ctx **msg_ctx);
567 int ecryptfs_wait_for_response(struct ecryptfs_msg_ctx *msg_ctx,
568 struct ecryptfs_message **emsg);
569 int ecryptfs_init_messaging(unsigned int transport);
570 void ecryptfs_release_messaging(unsigned int transport);
572 int ecryptfs_send_netlink(char *data, int data_len,
573 struct ecryptfs_msg_ctx *msg_ctx, u16 msg_type,
574 u16 msg_flags, pid_t daemon_pid);
575 int ecryptfs_init_netlink(void);
576 void ecryptfs_release_netlink(void);
578 int ecryptfs_send_connector(char *data, int data_len,
579 struct ecryptfs_msg_ctx *msg_ctx, u16 msg_type,
580 u16 msg_flags, pid_t daemon_pid);
581 int ecryptfs_init_connector(void);
582 void ecryptfs_release_connector(void);
585 #endif /* #ifndef ECRYPTFS_KERNEL_H */