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>
37 /* Version verification for shared data structures w/ userspace */
38 #define ECRYPTFS_VERSION_MAJOR 0x00
39 #define ECRYPTFS_VERSION_MINOR 0x04
40 #define ECRYPTFS_SUPPORTED_FILE_VERSION 0x02
41 /* These flags indicate which features are supported by the kernel
42 * module; userspace tools such as the mount helper read
43 * ECRYPTFS_VERSIONING_MASK from a sysfs handle in order to determine
45 #define ECRYPTFS_VERSIONING_PASSPHRASE 0x00000001
46 #define ECRYPTFS_VERSIONING_PUBKEY 0x00000002
47 #define ECRYPTFS_VERSIONING_PLAINTEXT_PASSTHROUGH 0x00000004
48 #define ECRYPTFS_VERSIONING_POLICY 0x00000008
49 #define ECRYPTFS_VERSIONING_MASK (ECRYPTFS_VERSIONING_PASSPHRASE \
50 | ECRYPTFS_VERSIONING_PLAINTEXT_PASSTHROUGH)
52 #define ECRYPTFS_MAX_PASSWORD_LENGTH 64
53 #define ECRYPTFS_MAX_PASSPHRASE_BYTES ECRYPTFS_MAX_PASSWORD_LENGTH
54 #define ECRYPTFS_SALT_SIZE 8
55 #define ECRYPTFS_SALT_SIZE_HEX (ECRYPTFS_SALT_SIZE*2)
56 /* The original signature size is only for what is stored on disk; all
57 * in-memory representations are expanded hex, so it better adapted to
58 * be passed around or referenced on the command line */
59 #define ECRYPTFS_SIG_SIZE 8
60 #define ECRYPTFS_SIG_SIZE_HEX (ECRYPTFS_SIG_SIZE*2)
61 #define ECRYPTFS_PASSWORD_SIG_SIZE ECRYPTFS_SIG_SIZE_HEX
62 #define ECRYPTFS_MAX_KEY_BYTES 64
63 #define ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES 512
64 #define ECRYPTFS_DEFAULT_IV_BYTES 16
65 #define ECRYPTFS_FILE_VERSION 0x02
66 #define ECRYPTFS_DEFAULT_HEADER_EXTENT_SIZE 8192
67 #define ECRYPTFS_DEFAULT_EXTENT_SIZE 4096
68 #define ECRYPTFS_MINIMUM_HEADER_EXTENT_SIZE 8192
69 #define ECRYPTFS_DEFAULT_MSG_CTX_ELEMS 32
70 #define ECRYPTFS_DEFAULT_SEND_TIMEOUT HZ
71 #define ECRYPTFS_MAX_MSG_CTX_TTL (HZ*3)
72 #define ECRYPTFS_NLMSG_HELO 100
73 #define ECRYPTFS_NLMSG_QUIT 101
74 #define ECRYPTFS_NLMSG_REQUEST 102
75 #define ECRYPTFS_NLMSG_RESPONSE 103
76 #define ECRYPTFS_MAX_PKI_NAME_BYTES 16
77 #define ECRYPTFS_DEFAULT_NUM_USERS 4
78 #define ECRYPTFS_MAX_NUM_USERS 32768
79 #define ECRYPTFS_TRANSPORT_NETLINK 0
80 #define ECRYPTFS_TRANSPORT_CONNECTOR 1
81 #define ECRYPTFS_TRANSPORT_RELAYFS 2
82 #define ECRYPTFS_DEFAULT_TRANSPORT ECRYPTFS_TRANSPORT_NETLINK
84 #define RFC2440_CIPHER_DES3_EDE 0x02
85 #define RFC2440_CIPHER_CAST_5 0x03
86 #define RFC2440_CIPHER_BLOWFISH 0x04
87 #define RFC2440_CIPHER_AES_128 0x07
88 #define RFC2440_CIPHER_AES_192 0x08
89 #define RFC2440_CIPHER_AES_256 0x09
90 #define RFC2440_CIPHER_TWOFISH 0x0a
91 #define RFC2440_CIPHER_CAST_6 0x0b
93 #define ECRYPTFS_SET_FLAG(flag_bit_vector, flag) (flag_bit_vector |= (flag))
94 #define ECRYPTFS_CLEAR_FLAG(flag_bit_vector, flag) (flag_bit_vector &= ~(flag))
95 #define ECRYPTFS_CHECK_FLAG(flag_bit_vector, flag) (flag_bit_vector & (flag))
96 #define RFC2440_CIPHER_RSA 0x01
99 * For convenience, we may need to pass around the encrypted session
100 * key between kernel and userspace because the authentication token
101 * may not be extractable. For example, the TPM may not release the
102 * private key, instead requiring the encrypted data and returning the
105 struct ecryptfs_session_key {
106 #define ECRYPTFS_USERSPACE_SHOULD_TRY_TO_DECRYPT 0x00000001
107 #define ECRYPTFS_USERSPACE_SHOULD_TRY_TO_ENCRYPT 0x00000002
108 #define ECRYPTFS_CONTAINS_DECRYPTED_KEY 0x00000004
109 #define ECRYPTFS_CONTAINS_ENCRYPTED_KEY 0x00000008
111 u32 encrypted_key_size;
112 u32 decrypted_key_size;
113 u8 encrypted_key[ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES];
114 u8 decrypted_key[ECRYPTFS_MAX_KEY_BYTES];
117 struct ecryptfs_password {
121 u32 session_key_encryption_key_bytes;
122 #define ECRYPTFS_PERSISTENT_PASSWORD 0x01
123 #define ECRYPTFS_SESSION_KEY_ENCRYPTION_KEY_SET 0x02
125 /* Iterated-hash concatenation of salt and passphrase */
126 u8 session_key_encryption_key[ECRYPTFS_MAX_KEY_BYTES];
127 u8 signature[ECRYPTFS_PASSWORD_SIG_SIZE + 1];
128 /* Always in expanded hex */
129 u8 salt[ECRYPTFS_SALT_SIZE];
132 enum ecryptfs_token_types {ECRYPTFS_PASSWORD, ECRYPTFS_PRIVATE_KEY};
134 struct ecryptfs_private_key {
137 u8 signature[ECRYPTFS_PASSWORD_SIG_SIZE + 1];
138 char pki_type[ECRYPTFS_MAX_PKI_NAME_BYTES + 1];
142 /* May be a password or a private key */
143 struct ecryptfs_auth_tok {
144 u16 version; /* 8-bit major and 8-bit minor */
147 struct ecryptfs_session_key session_key;
150 struct ecryptfs_password password;
151 struct ecryptfs_private_key private_key;
153 } __attribute__ ((packed));
155 void ecryptfs_dump_auth_tok(struct ecryptfs_auth_tok *auth_tok);
156 extern void ecryptfs_to_hex(char *dst, char *src, size_t src_size);
157 extern void ecryptfs_from_hex(char *dst, char *src, int dst_size);
159 struct ecryptfs_key_record {
162 unsigned char sig[ECRYPTFS_SIG_SIZE];
163 unsigned char enc_key[ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES];
166 struct ecryptfs_auth_tok_list {
167 struct ecryptfs_auth_tok *auth_tok;
168 struct list_head list;
171 struct ecryptfs_crypt_stat;
172 struct ecryptfs_mount_crypt_stat;
174 struct ecryptfs_page_crypt_context {
176 #define ECRYPTFS_PREPARE_COMMIT_MODE 0
177 #define ECRYPTFS_WRITEPAGE_MODE 1
180 struct file *lower_file;
181 struct writeback_control *wbc;
185 static inline struct ecryptfs_auth_tok *
186 ecryptfs_get_key_payload_data(struct key *key)
188 return (struct ecryptfs_auth_tok *)
189 (((struct user_key_payload*)key->payload.data)->data);
192 #define ECRYPTFS_SUPER_MAGIC 0xf15f
193 #define ECRYPTFS_MAX_KEYSET_SIZE 1024
194 #define ECRYPTFS_MAX_CIPHER_NAME_SIZE 32
195 #define ECRYPTFS_MAX_NUM_ENC_KEYS 64
196 #define ECRYPTFS_MAX_NUM_KEYSIGS 2 /* TODO: Make this a linked list */
197 #define ECRYPTFS_MAX_IV_BYTES 16 /* 128 bits */
198 #define ECRYPTFS_SALT_BYTES 2
199 #define MAGIC_ECRYPTFS_MARKER 0x3c81b7f5
200 #define MAGIC_ECRYPTFS_MARKER_SIZE_BYTES 8 /* 4*2 */
201 #define ECRYPTFS_FILE_SIZE_BYTES 8
202 #define ECRYPTFS_DEFAULT_CIPHER "aes"
203 #define ECRYPTFS_DEFAULT_KEY_BYTES 16
204 #define ECRYPTFS_DEFAULT_HASH "md5"
205 #define ECRYPTFS_TAG_1_PACKET_TYPE 0x01
206 #define ECRYPTFS_TAG_3_PACKET_TYPE 0x8C
207 #define ECRYPTFS_TAG_11_PACKET_TYPE 0xED
208 #define ECRYPTFS_TAG_64_PACKET_TYPE 0x40
209 #define ECRYPTFS_TAG_65_PACKET_TYPE 0x41
210 #define ECRYPTFS_TAG_66_PACKET_TYPE 0x42
211 #define ECRYPTFS_TAG_67_PACKET_TYPE 0x43
212 #define MD5_DIGEST_SIZE 16
215 * This is the primary struct associated with each encrypted file.
217 * TODO: cache align/pack?
219 struct ecryptfs_crypt_stat {
220 #define ECRYPTFS_STRUCT_INITIALIZED 0x00000001
221 #define ECRYPTFS_POLICY_APPLIED 0x00000002
222 #define ECRYPTFS_NEW_FILE 0x00000004
223 #define ECRYPTFS_ENCRYPTED 0x00000008
224 #define ECRYPTFS_SECURITY_WARNING 0x00000010
225 #define ECRYPTFS_ENABLE_HMAC 0x00000020
226 #define ECRYPTFS_ENCRYPT_IV_PAGES 0x00000040
227 #define ECRYPTFS_KEY_VALID 0x00000080
229 unsigned int file_version;
232 size_t header_extent_size;
233 size_t num_header_extents_at_front;
234 size_t extent_size; /* Data extent size; default is 4096 */
237 unsigned int extent_mask;
238 struct ecryptfs_mount_crypt_stat *mount_crypt_stat;
239 struct crypto_blkcipher *tfm;
240 struct crypto_hash *hash_tfm; /* Crypto context for generating
241 * the initialization vectors */
242 unsigned char cipher[ECRYPTFS_MAX_CIPHER_NAME_SIZE];
243 unsigned char key[ECRYPTFS_MAX_KEY_BYTES];
244 unsigned char root_iv[ECRYPTFS_MAX_IV_BYTES];
245 unsigned char keysigs[ECRYPTFS_MAX_NUM_KEYSIGS][ECRYPTFS_SIG_SIZE_HEX];
246 struct mutex cs_tfm_mutex;
247 struct mutex cs_hash_tfm_mutex;
248 struct mutex cs_mutex;
251 /* inode private data. */
252 struct ecryptfs_inode_info {
253 struct inode vfs_inode;
254 struct inode *wii_inode;
255 struct ecryptfs_crypt_stat crypt_stat;
258 /* dentry private data. Each dentry must keep track of a lower
260 struct ecryptfs_dentry_info {
261 struct path lower_path;
262 struct ecryptfs_crypt_stat *crypt_stat;
266 * This struct is to enable a mount-wide passphrase/salt combo. This
267 * is more or less a stopgap to provide similar functionality to other
268 * crypto filesystems like EncFS or CFS until full policy support is
269 * implemented in eCryptfs.
271 struct ecryptfs_mount_crypt_stat {
272 /* Pointers to memory we do not own, do not free these */
273 #define ECRYPTFS_PLAINTEXT_PASSTHROUGH_ENABLED 0x00000001
275 struct ecryptfs_auth_tok *global_auth_tok;
276 struct key *global_auth_tok_key;
277 size_t global_default_cipher_key_size;
278 struct crypto_blkcipher *global_key_tfm;
279 struct mutex global_key_tfm_mutex;
280 unsigned char global_default_cipher_name[ECRYPTFS_MAX_CIPHER_NAME_SIZE
282 unsigned char global_auth_tok_sig[ECRYPTFS_SIG_SIZE_HEX + 1];
285 /* superblock private data. */
286 struct ecryptfs_sb_info {
287 struct super_block *wsi_sb;
288 struct ecryptfs_mount_crypt_stat mount_crypt_stat;
291 /* file private data. */
292 struct ecryptfs_file_info {
293 struct file *wfi_file;
294 struct ecryptfs_crypt_stat *crypt_stat;
297 /* auth_tok <=> encrypted_session_key mappings */
298 struct ecryptfs_auth_tok_list_item {
299 unsigned char encrypted_session_key[ECRYPTFS_MAX_KEY_BYTES];
300 struct list_head list;
301 struct ecryptfs_auth_tok auth_tok;
304 struct ecryptfs_message {
310 struct ecryptfs_msg_ctx {
311 #define ECRYPTFS_MSG_CTX_STATE_FREE 0x0001
312 #define ECRYPTFS_MSG_CTX_STATE_PENDING 0x0002
313 #define ECRYPTFS_MSG_CTX_STATE_DONE 0x0003
316 unsigned int counter;
317 struct ecryptfs_message *msg;
318 struct task_struct *task;
319 struct list_head node;
323 extern struct list_head ecryptfs_msg_ctx_free_list;
324 extern struct list_head ecryptfs_msg_ctx_alloc_list;
325 extern struct mutex ecryptfs_msg_ctx_lists_mux;
327 #define ecryptfs_uid_hash(uid) \
328 hash_long((unsigned long)uid, ecryptfs_hash_buckets)
329 extern struct hlist_head *ecryptfs_daemon_id_hash;
330 extern struct mutex ecryptfs_daemon_id_hash_mux;
331 extern int ecryptfs_hash_buckets;
333 extern unsigned int ecryptfs_msg_counter;
334 extern struct ecryptfs_msg_ctx *ecryptfs_msg_ctx_arr;
335 extern unsigned int ecryptfs_transport;
337 struct ecryptfs_daemon_id {
340 struct hlist_node id_chain;
343 static inline struct ecryptfs_file_info *
344 ecryptfs_file_to_private(struct file *file)
346 return (struct ecryptfs_file_info *)file->private_data;
350 ecryptfs_set_file_private(struct file *file,
351 struct ecryptfs_file_info *file_info)
353 file->private_data = file_info;
356 static inline struct file *ecryptfs_file_to_lower(struct file *file)
358 return ((struct ecryptfs_file_info *)file->private_data)->wfi_file;
362 ecryptfs_set_file_lower(struct file *file, struct file *lower_file)
364 ((struct ecryptfs_file_info *)file->private_data)->wfi_file =
368 static inline struct ecryptfs_inode_info *
369 ecryptfs_inode_to_private(struct inode *inode)
371 return container_of(inode, struct ecryptfs_inode_info, vfs_inode);
374 static inline struct inode *ecryptfs_inode_to_lower(struct inode *inode)
376 return ecryptfs_inode_to_private(inode)->wii_inode;
380 ecryptfs_set_inode_lower(struct inode *inode, struct inode *lower_inode)
382 ecryptfs_inode_to_private(inode)->wii_inode = lower_inode;
385 static inline struct ecryptfs_sb_info *
386 ecryptfs_superblock_to_private(struct super_block *sb)
388 return (struct ecryptfs_sb_info *)sb->s_fs_info;
392 ecryptfs_set_superblock_private(struct super_block *sb,
393 struct ecryptfs_sb_info *sb_info)
395 sb->s_fs_info = sb_info;
398 static inline struct super_block *
399 ecryptfs_superblock_to_lower(struct super_block *sb)
401 return ((struct ecryptfs_sb_info *)sb->s_fs_info)->wsi_sb;
405 ecryptfs_set_superblock_lower(struct super_block *sb,
406 struct super_block *lower_sb)
408 ((struct ecryptfs_sb_info *)sb->s_fs_info)->wsi_sb = lower_sb;
411 static inline struct ecryptfs_dentry_info *
412 ecryptfs_dentry_to_private(struct dentry *dentry)
414 return (struct ecryptfs_dentry_info *)dentry->d_fsdata;
418 ecryptfs_set_dentry_private(struct dentry *dentry,
419 struct ecryptfs_dentry_info *dentry_info)
421 dentry->d_fsdata = dentry_info;
424 static inline struct dentry *
425 ecryptfs_dentry_to_lower(struct dentry *dentry)
427 return ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.dentry;
431 ecryptfs_set_dentry_lower(struct dentry *dentry, struct dentry *lower_dentry)
433 ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.dentry =
437 static inline struct vfsmount *
438 ecryptfs_dentry_to_lower_mnt(struct dentry *dentry)
440 return ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.mnt;
444 ecryptfs_set_dentry_lower_mnt(struct dentry *dentry, struct vfsmount *lower_mnt)
446 ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.mnt =
450 #define ecryptfs_printk(type, fmt, arg...) \
451 __ecryptfs_printk(type "%s: " fmt, __FUNCTION__, ## arg);
452 void __ecryptfs_printk(const char *fmt, ...);
454 extern const struct file_operations ecryptfs_main_fops;
455 extern const struct file_operations ecryptfs_dir_fops;
456 extern struct inode_operations ecryptfs_main_iops;
457 extern struct inode_operations ecryptfs_dir_iops;
458 extern struct inode_operations ecryptfs_symlink_iops;
459 extern struct super_operations ecryptfs_sops;
460 extern struct dentry_operations ecryptfs_dops;
461 extern struct address_space_operations ecryptfs_aops;
462 extern int ecryptfs_verbosity;
463 extern unsigned int ecryptfs_message_buf_len;
464 extern signed long ecryptfs_message_wait_timeout;
465 extern unsigned int ecryptfs_number_of_users;
467 extern struct kmem_cache *ecryptfs_auth_tok_list_item_cache;
468 extern struct kmem_cache *ecryptfs_file_info_cache;
469 extern struct kmem_cache *ecryptfs_dentry_info_cache;
470 extern struct kmem_cache *ecryptfs_inode_info_cache;
471 extern struct kmem_cache *ecryptfs_sb_info_cache;
472 extern struct kmem_cache *ecryptfs_header_cache_0;
473 extern struct kmem_cache *ecryptfs_header_cache_1;
474 extern struct kmem_cache *ecryptfs_header_cache_2;
475 extern struct kmem_cache *ecryptfs_lower_page_cache;
477 int ecryptfs_interpose(struct dentry *hidden_dentry,
478 struct dentry *this_dentry, struct super_block *sb,
480 int ecryptfs_fill_zeros(struct file *file, loff_t new_length);
481 int ecryptfs_decode_filename(struct ecryptfs_crypt_stat *crypt_stat,
482 const char *name, int length,
483 char **decrypted_name);
484 int ecryptfs_encode_filename(struct ecryptfs_crypt_stat *crypt_stat,
485 const char *name, int length,
486 char **encoded_name);
487 struct dentry *ecryptfs_lower_dentry(struct dentry *this_dentry);
488 void ecryptfs_dump_hex(char *data, int bytes);
489 int virt_to_scatterlist(const void *addr, int size, struct scatterlist *sg,
491 int ecryptfs_compute_root_iv(struct ecryptfs_crypt_stat *crypt_stat);
492 void ecryptfs_rotate_iv(unsigned char *iv);
493 void ecryptfs_init_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat);
494 void ecryptfs_destruct_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat);
495 void ecryptfs_destruct_mount_crypt_stat(
496 struct ecryptfs_mount_crypt_stat *mount_crypt_stat);
497 int ecryptfs_init_crypt_ctx(struct ecryptfs_crypt_stat *crypt_stat);
498 int ecryptfs_crypto_api_algify_cipher_name(char **algified_name,
500 char *chaining_modifier);
501 int ecryptfs_write_inode_size_to_header(struct file *lower_file,
502 struct inode *lower_inode,
503 struct inode *inode);
504 int ecryptfs_get_lower_page(struct page **lower_page, struct inode *lower_inode,
505 struct file *lower_file,
506 unsigned long lower_page_index, int byte_offset,
509 ecryptfs_commit_lower_page(struct page *lower_page, struct inode *lower_inode,
510 struct file *lower_file, int byte_offset,
512 int ecryptfs_copy_page_to_lower(struct page *page, struct inode *lower_inode,
513 struct file *lower_file);
514 int ecryptfs_do_readpage(struct file *file, struct page *page,
515 pgoff_t lower_page_index);
516 int ecryptfs_grab_and_map_lower_page(struct page **lower_page,
518 struct inode *lower_inode,
519 unsigned long lower_page_index);
520 int ecryptfs_writepage_and_release_lower_page(struct page *lower_page,
521 struct inode *lower_inode,
522 struct writeback_control *wbc);
523 int ecryptfs_encrypt_page(struct ecryptfs_page_crypt_context *ctx);
524 int ecryptfs_decrypt_page(struct file *file, struct page *page);
525 int ecryptfs_write_headers(struct dentry *ecryptfs_dentry,
526 struct file *lower_file);
527 int ecryptfs_write_headers_virt(char *page_virt,
528 struct ecryptfs_crypt_stat *crypt_stat,
529 struct dentry *ecryptfs_dentry);
530 int ecryptfs_read_headers(struct dentry *ecryptfs_dentry,
531 struct file *lower_file);
532 int ecryptfs_new_file_context(struct dentry *ecryptfs_dentry);
533 int contains_ecryptfs_marker(char *data);
534 int ecryptfs_read_header_region(char *data, struct dentry *dentry,
535 struct vfsmount *mnt);
536 u16 ecryptfs_code_for_cipher_string(struct ecryptfs_crypt_stat *crypt_stat);
537 int ecryptfs_cipher_code_to_string(char *str, u16 cipher_code);
538 void ecryptfs_set_default_sizes(struct ecryptfs_crypt_stat *crypt_stat);
539 int ecryptfs_generate_key_packet_set(char *dest_base,
540 struct ecryptfs_crypt_stat *crypt_stat,
541 struct dentry *ecryptfs_dentry,
542 size_t *len, size_t max);
543 int process_request_key_err(long err_code);
545 ecryptfs_parse_packet_set(struct ecryptfs_crypt_stat *crypt_stat,
546 unsigned char *src, struct dentry *ecryptfs_dentry);
547 int ecryptfs_truncate(struct dentry *dentry, loff_t new_length);
549 ecryptfs_process_cipher(struct crypto_blkcipher **key_tfm, char *cipher_name,
551 int ecryptfs_inode_test(struct inode *inode, void *candidate_lower_inode);
552 int ecryptfs_inode_set(struct inode *inode, void *lower_inode);
553 void ecryptfs_init_inode(struct inode *inode, struct inode *lower_inode);
554 int ecryptfs_open_lower_file(struct file **lower_file,
555 struct dentry *lower_dentry,
556 struct vfsmount *lower_mnt, int flags);
557 int ecryptfs_close_lower_file(struct file *lower_file);
559 int ecryptfs_process_helo(unsigned int transport, uid_t uid, pid_t pid);
560 int ecryptfs_process_quit(uid_t uid, pid_t pid);
561 int ecryptfs_process_response(struct ecryptfs_message *msg, pid_t pid, u32 seq);
562 int ecryptfs_send_message(unsigned int transport, char *data, int data_len,
563 struct ecryptfs_msg_ctx **msg_ctx);
564 int ecryptfs_wait_for_response(struct ecryptfs_msg_ctx *msg_ctx,
565 struct ecryptfs_message **emsg);
566 int ecryptfs_init_messaging(unsigned int transport);
567 void ecryptfs_release_messaging(unsigned int transport);
569 int ecryptfs_send_netlink(char *data, int data_len,
570 struct ecryptfs_msg_ctx *msg_ctx, u16 msg_type,
571 u16 msg_flags, pid_t daemon_pid);
572 int ecryptfs_init_netlink(void);
573 void ecryptfs_release_netlink(void);
575 int ecryptfs_send_connector(char *data, int data_len,
576 struct ecryptfs_msg_ctx *msg_ctx, u16 msg_type,
577 u16 msg_flags, pid_t daemon_pid);
578 int ecryptfs_init_connector(void);
579 void ecryptfs_release_connector(void);
582 #endif /* #ifndef ECRYPTFS_KERNEL_H */