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28#ifndef ECRYPTFS_KERNEL_H
29#define ECRYPTFS_KERNEL_H
30
31#include <crypto/skcipher.h>
32#include <keys/user-type.h>
33#include <keys/encrypted-type.h>
34#include <linux/fs.h>
35#include <linux/fs_stack.h>
36#include <linux/namei.h>
37#include <linux/scatterlist.h>
38#include <linux/hash.h>
39#include <linux/nsproxy.h>
40#include <linux/backing-dev.h>
41#include <linux/ecryptfs.h>
42
43#define ECRYPTFS_DEFAULT_IV_BYTES 16
44#define ECRYPTFS_DEFAULT_EXTENT_SIZE 4096
45#define ECRYPTFS_MINIMUM_HEADER_EXTENT_SIZE 8192
46#define ECRYPTFS_DEFAULT_MSG_CTX_ELEMS 32
47#define ECRYPTFS_DEFAULT_SEND_TIMEOUT HZ
48#define ECRYPTFS_MAX_MSG_CTX_TTL (HZ*3)
49#define ECRYPTFS_DEFAULT_NUM_USERS 4
50#define ECRYPTFS_MAX_NUM_USERS 32768
51#define ECRYPTFS_XATTR_NAME "user.ecryptfs"
52
53void ecryptfs_dump_auth_tok(struct ecryptfs_auth_tok *auth_tok);
54extern void ecryptfs_to_hex(char *dst, char *src, size_t src_size);
55extern void ecryptfs_from_hex(char *dst, char *src, int dst_size);
56
57struct ecryptfs_key_record {
58 unsigned char type;
59 size_t enc_key_size;
60 unsigned char sig[ECRYPTFS_SIG_SIZE];
61 unsigned char enc_key[ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES];
62};
63
64struct ecryptfs_auth_tok_list {
65 struct ecryptfs_auth_tok *auth_tok;
66 struct list_head list;
67};
68
69struct ecryptfs_crypt_stat;
70struct ecryptfs_mount_crypt_stat;
71
72struct ecryptfs_page_crypt_context {
73 struct page *page;
74#define ECRYPTFS_PREPARE_COMMIT_MODE 0
75#define ECRYPTFS_WRITEPAGE_MODE 1
76 unsigned int mode;
77 union {
78 struct file *lower_file;
79 struct writeback_control *wbc;
80 } param;
81};
82
83#if defined(CONFIG_ENCRYPTED_KEYS) || defined(CONFIG_ENCRYPTED_KEYS_MODULE)
84static inline struct ecryptfs_auth_tok *
85ecryptfs_get_encrypted_key_payload_data(struct key *key)
86{
87 if (key->type == &key_type_encrypted)
88 return (struct ecryptfs_auth_tok *)
89 (&((struct encrypted_key_payload *)key->payload.data[0])->payload_data);
90 else
91 return NULL;
92}
93
94static inline struct key *ecryptfs_get_encrypted_key(char *sig)
95{
96 return request_key(&key_type_encrypted, sig, NULL);
97}
98
99#else
100static inline struct ecryptfs_auth_tok *
101ecryptfs_get_encrypted_key_payload_data(struct key *key)
102{
103 return NULL;
104}
105
106static inline struct key *ecryptfs_get_encrypted_key(char *sig)
107{
108 return ERR_PTR(-ENOKEY);
109}
110
111#endif
112
113static inline struct ecryptfs_auth_tok *
114ecryptfs_get_key_payload_data(struct key *key)
115{
116 struct ecryptfs_auth_tok *auth_tok;
117
118 auth_tok = ecryptfs_get_encrypted_key_payload_data(key);
119 if (!auth_tok)
120 return (struct ecryptfs_auth_tok *)user_key_payload_locked(key)->data;
121 else
122 return auth_tok;
123}
124
125#define ECRYPTFS_MAX_KEYSET_SIZE 1024
126#define ECRYPTFS_MAX_CIPHER_NAME_SIZE 31
127#define ECRYPTFS_MAX_NUM_ENC_KEYS 64
128#define ECRYPTFS_MAX_IV_BYTES 16
129#define ECRYPTFS_SALT_BYTES 2
130#define MAGIC_ECRYPTFS_MARKER 0x3c81b7f5
131#define MAGIC_ECRYPTFS_MARKER_SIZE_BYTES 8
132#define ECRYPTFS_FILE_SIZE_BYTES (sizeof(u64))
133#define ECRYPTFS_SIZE_AND_MARKER_BYTES (ECRYPTFS_FILE_SIZE_BYTES \
134 + MAGIC_ECRYPTFS_MARKER_SIZE_BYTES)
135#define ECRYPTFS_DEFAULT_CIPHER "aes"
136#define ECRYPTFS_DEFAULT_KEY_BYTES 16
137#define ECRYPTFS_DEFAULT_HASH "md5"
138#define ECRYPTFS_TAG_70_DIGEST ECRYPTFS_DEFAULT_HASH
139#define ECRYPTFS_TAG_1_PACKET_TYPE 0x01
140#define ECRYPTFS_TAG_3_PACKET_TYPE 0x8C
141#define ECRYPTFS_TAG_11_PACKET_TYPE 0xED
142#define ECRYPTFS_TAG_64_PACKET_TYPE 0x40
143#define ECRYPTFS_TAG_65_PACKET_TYPE 0x41
144#define ECRYPTFS_TAG_66_PACKET_TYPE 0x42
145#define ECRYPTFS_TAG_67_PACKET_TYPE 0x43
146#define ECRYPTFS_TAG_70_PACKET_TYPE 0x46
147
148#define ECRYPTFS_TAG_71_PACKET_TYPE 0x47
149
150#define ECRYPTFS_TAG_72_PACKET_TYPE 0x48
151
152#define ECRYPTFS_TAG_73_PACKET_TYPE 0x49
153
154#define ECRYPTFS_MIN_PKT_LEN_SIZE 1
155#define ECRYPTFS_MAX_PKT_LEN_SIZE 2
156
157
158
159
160
161#define ECRYPTFS_FILENAME_MIN_RANDOM_PREPEND_BYTES 16
162#define ECRYPTFS_NON_NULL 0x42
163#define MD5_DIGEST_SIZE 16
164#define ECRYPTFS_TAG_70_DIGEST_SIZE MD5_DIGEST_SIZE
165#define ECRYPTFS_TAG_70_MIN_METADATA_SIZE (1 + ECRYPTFS_MIN_PKT_LEN_SIZE \
166 + ECRYPTFS_SIG_SIZE + 1 + 1)
167#define ECRYPTFS_TAG_70_MAX_METADATA_SIZE (1 + ECRYPTFS_MAX_PKT_LEN_SIZE \
168 + ECRYPTFS_SIG_SIZE + 1 + 1)
169#define ECRYPTFS_FEK_ENCRYPTED_FILENAME_PREFIX "ECRYPTFS_FEK_ENCRYPTED."
170#define ECRYPTFS_FEK_ENCRYPTED_FILENAME_PREFIX_SIZE 23
171#define ECRYPTFS_FNEK_ENCRYPTED_FILENAME_PREFIX "ECRYPTFS_FNEK_ENCRYPTED."
172#define ECRYPTFS_FNEK_ENCRYPTED_FILENAME_PREFIX_SIZE 24
173#define ECRYPTFS_ENCRYPTED_DENTRY_NAME_LEN (18 + 1 + 4 + 1 + 32)
174
175#ifdef CONFIG_ECRYPT_FS_MESSAGING
176# define ECRYPTFS_VERSIONING_MASK_MESSAGING (ECRYPTFS_VERSIONING_DEVMISC \
177 | ECRYPTFS_VERSIONING_PUBKEY)
178#else
179# define ECRYPTFS_VERSIONING_MASK_MESSAGING 0
180#endif
181
182#define ECRYPTFS_VERSIONING_MASK (ECRYPTFS_VERSIONING_PASSPHRASE \
183 | ECRYPTFS_VERSIONING_PLAINTEXT_PASSTHROUGH \
184 | ECRYPTFS_VERSIONING_XATTR \
185 | ECRYPTFS_VERSIONING_MULTKEY \
186 | ECRYPTFS_VERSIONING_MASK_MESSAGING \
187 | ECRYPTFS_VERSIONING_FILENAME_ENCRYPTION)
188struct ecryptfs_key_sig {
189 struct list_head crypt_stat_list;
190 char keysig[ECRYPTFS_SIG_SIZE_HEX + 1];
191};
192
193struct ecryptfs_filename {
194 struct list_head crypt_stat_list;
195#define ECRYPTFS_FILENAME_CONTAINS_DECRYPTED 0x00000001
196 u32 flags;
197 u32 seq_no;
198 char *filename;
199 char *encrypted_filename;
200 size_t filename_size;
201 size_t encrypted_filename_size;
202 char fnek_sig[ECRYPTFS_SIG_SIZE_HEX];
203 char dentry_name[ECRYPTFS_ENCRYPTED_DENTRY_NAME_LEN + 1];
204};
205
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210
211struct ecryptfs_crypt_stat {
212#define ECRYPTFS_STRUCT_INITIALIZED 0x00000001
213#define ECRYPTFS_POLICY_APPLIED 0x00000002
214#define ECRYPTFS_ENCRYPTED 0x00000004
215#define ECRYPTFS_SECURITY_WARNING 0x00000008
216#define ECRYPTFS_ENABLE_HMAC 0x00000010
217#define ECRYPTFS_ENCRYPT_IV_PAGES 0x00000020
218#define ECRYPTFS_KEY_VALID 0x00000040
219#define ECRYPTFS_METADATA_IN_XATTR 0x00000080
220#define ECRYPTFS_VIEW_AS_ENCRYPTED 0x00000100
221#define ECRYPTFS_KEY_SET 0x00000200
222#define ECRYPTFS_ENCRYPT_FILENAMES 0x00000400
223#define ECRYPTFS_ENCFN_USE_MOUNT_FNEK 0x00000800
224#define ECRYPTFS_ENCFN_USE_FEK 0x00001000
225#define ECRYPTFS_UNLINK_SIGS 0x00002000
226#define ECRYPTFS_I_SIZE_INITIALIZED 0x00004000
227 u32 flags;
228 unsigned int file_version;
229 size_t iv_bytes;
230 size_t metadata_size;
231 size_t extent_size;
232 size_t key_size;
233 size_t extent_shift;
234 unsigned int extent_mask;
235 struct ecryptfs_mount_crypt_stat *mount_crypt_stat;
236 struct crypto_skcipher *tfm;
237 struct crypto_shash *hash_tfm;
238
239 unsigned char cipher[ECRYPTFS_MAX_CIPHER_NAME_SIZE + 1];
240 unsigned char key[ECRYPTFS_MAX_KEY_BYTES];
241 unsigned char root_iv[ECRYPTFS_MAX_IV_BYTES];
242 struct list_head keysig_list;
243 struct mutex keysig_list_mutex;
244 struct mutex cs_tfm_mutex;
245 struct mutex cs_mutex;
246};
247
248
249struct ecryptfs_inode_info {
250 struct inode vfs_inode;
251 struct inode *wii_inode;
252 struct mutex lower_file_mutex;
253 atomic_t lower_file_count;
254 struct file *lower_file;
255 struct ecryptfs_crypt_stat crypt_stat;
256};
257
258
259
260struct ecryptfs_dentry_info {
261 struct path lower_path;
262 union {
263 struct ecryptfs_crypt_stat *crypt_stat;
264 struct rcu_head rcu;
265 };
266};
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286
287struct ecryptfs_global_auth_tok {
288#define ECRYPTFS_AUTH_TOK_INVALID 0x00000001
289#define ECRYPTFS_AUTH_TOK_FNEK 0x00000002
290 u32 flags;
291 struct list_head mount_crypt_stat_list;
292 struct key *global_auth_tok_key;
293 unsigned char sig[ECRYPTFS_SIG_SIZE_HEX + 1];
294};
295
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309
310struct ecryptfs_key_tfm {
311 struct crypto_skcipher *key_tfm;
312 size_t key_size;
313 struct mutex key_tfm_mutex;
314 struct list_head key_tfm_list;
315 unsigned char cipher_name[ECRYPTFS_MAX_CIPHER_NAME_SIZE + 1];
316};
317
318extern struct mutex key_tfm_list_mutex;
319
320
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322
323
324
325
326struct ecryptfs_mount_crypt_stat {
327
328#define ECRYPTFS_PLAINTEXT_PASSTHROUGH_ENABLED 0x00000001
329#define ECRYPTFS_XATTR_METADATA_ENABLED 0x00000002
330#define ECRYPTFS_ENCRYPTED_VIEW_ENABLED 0x00000004
331#define ECRYPTFS_MOUNT_CRYPT_STAT_INITIALIZED 0x00000008
332#define ECRYPTFS_GLOBAL_ENCRYPT_FILENAMES 0x00000010
333#define ECRYPTFS_GLOBAL_ENCFN_USE_MOUNT_FNEK 0x00000020
334#define ECRYPTFS_GLOBAL_ENCFN_USE_FEK 0x00000040
335#define ECRYPTFS_GLOBAL_MOUNT_AUTH_TOK_ONLY 0x00000080
336 u32 flags;
337 struct list_head global_auth_tok_list;
338 struct mutex global_auth_tok_list_mutex;
339 size_t global_default_cipher_key_size;
340 size_t global_default_fn_cipher_key_bytes;
341 unsigned char global_default_cipher_name[ECRYPTFS_MAX_CIPHER_NAME_SIZE
342 + 1];
343 unsigned char global_default_fn_cipher_name[
344 ECRYPTFS_MAX_CIPHER_NAME_SIZE + 1];
345 char global_default_fnek_sig[ECRYPTFS_SIG_SIZE_HEX + 1];
346};
347
348
349struct ecryptfs_sb_info {
350 struct super_block *wsi_sb;
351 struct ecryptfs_mount_crypt_stat mount_crypt_stat;
352};
353
354
355struct ecryptfs_file_info {
356 struct file *wfi_file;
357 struct ecryptfs_crypt_stat *crypt_stat;
358};
359
360
361struct ecryptfs_auth_tok_list_item {
362 unsigned char encrypted_session_key[ECRYPTFS_MAX_KEY_BYTES];
363 struct list_head list;
364 struct ecryptfs_auth_tok auth_tok;
365};
366
367struct ecryptfs_message {
368
369
370
371 u32 index;
372 u32 data_len;
373 u8 data[];
374};
375
376struct ecryptfs_msg_ctx {
377#define ECRYPTFS_MSG_CTX_STATE_FREE 0x01
378#define ECRYPTFS_MSG_CTX_STATE_PENDING 0x02
379#define ECRYPTFS_MSG_CTX_STATE_DONE 0x03
380#define ECRYPTFS_MSG_CTX_STATE_NO_REPLY 0x04
381 u8 state;
382#define ECRYPTFS_MSG_HELO 100
383#define ECRYPTFS_MSG_QUIT 101
384#define ECRYPTFS_MSG_REQUEST 102
385#define ECRYPTFS_MSG_RESPONSE 103
386 u8 type;
387 u32 index;
388
389
390
391
392
393 u32 counter;
394 size_t msg_size;
395 struct ecryptfs_message *msg;
396 struct task_struct *task;
397 struct list_head node;
398 struct list_head daemon_out_list;
399 struct mutex mux;
400};
401
402struct ecryptfs_daemon {
403#define ECRYPTFS_DAEMON_IN_READ 0x00000001
404#define ECRYPTFS_DAEMON_IN_POLL 0x00000002
405#define ECRYPTFS_DAEMON_ZOMBIE 0x00000004
406#define ECRYPTFS_DAEMON_MISCDEV_OPEN 0x00000008
407 u32 flags;
408 u32 num_queued_msg_ctx;
409 struct file *file;
410 struct mutex mux;
411 struct list_head msg_ctx_out_queue;
412 wait_queue_head_t wait;
413 struct hlist_node euid_chain;
414};
415
416#ifdef CONFIG_ECRYPT_FS_MESSAGING
417extern struct mutex ecryptfs_daemon_hash_mux;
418#endif
419
420static inline size_t
421ecryptfs_lower_header_size(struct ecryptfs_crypt_stat *crypt_stat)
422{
423 if (crypt_stat->flags & ECRYPTFS_METADATA_IN_XATTR)
424 return 0;
425 return crypt_stat->metadata_size;
426}
427
428static inline struct ecryptfs_file_info *
429ecryptfs_file_to_private(struct file *file)
430{
431 return file->private_data;
432}
433
434static inline void
435ecryptfs_set_file_private(struct file *file,
436 struct ecryptfs_file_info *file_info)
437{
438 file->private_data = file_info;
439}
440
441static inline struct file *ecryptfs_file_to_lower(struct file *file)
442{
443 return ((struct ecryptfs_file_info *)file->private_data)->wfi_file;
444}
445
446static inline void
447ecryptfs_set_file_lower(struct file *file, struct file *lower_file)
448{
449 ((struct ecryptfs_file_info *)file->private_data)->wfi_file =
450 lower_file;
451}
452
453static inline struct ecryptfs_inode_info *
454ecryptfs_inode_to_private(struct inode *inode)
455{
456 return container_of(inode, struct ecryptfs_inode_info, vfs_inode);
457}
458
459static inline struct inode *ecryptfs_inode_to_lower(struct inode *inode)
460{
461 return ecryptfs_inode_to_private(inode)->wii_inode;
462}
463
464static inline void
465ecryptfs_set_inode_lower(struct inode *inode, struct inode *lower_inode)
466{
467 ecryptfs_inode_to_private(inode)->wii_inode = lower_inode;
468}
469
470static inline struct ecryptfs_sb_info *
471ecryptfs_superblock_to_private(struct super_block *sb)
472{
473 return (struct ecryptfs_sb_info *)sb->s_fs_info;
474}
475
476static inline void
477ecryptfs_set_superblock_private(struct super_block *sb,
478 struct ecryptfs_sb_info *sb_info)
479{
480 sb->s_fs_info = sb_info;
481}
482
483static inline struct super_block *
484ecryptfs_superblock_to_lower(struct super_block *sb)
485{
486 return ((struct ecryptfs_sb_info *)sb->s_fs_info)->wsi_sb;
487}
488
489static inline void
490ecryptfs_set_superblock_lower(struct super_block *sb,
491 struct super_block *lower_sb)
492{
493 ((struct ecryptfs_sb_info *)sb->s_fs_info)->wsi_sb = lower_sb;
494}
495
496static inline struct ecryptfs_dentry_info *
497ecryptfs_dentry_to_private(struct dentry *dentry)
498{
499 return (struct ecryptfs_dentry_info *)dentry->d_fsdata;
500}
501
502static inline void
503ecryptfs_set_dentry_private(struct dentry *dentry,
504 struct ecryptfs_dentry_info *dentry_info)
505{
506 dentry->d_fsdata = dentry_info;
507}
508
509static inline struct dentry *
510ecryptfs_dentry_to_lower(struct dentry *dentry)
511{
512 return ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.dentry;
513}
514
515static inline struct vfsmount *
516ecryptfs_dentry_to_lower_mnt(struct dentry *dentry)
517{
518 return ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.mnt;
519}
520
521static inline struct path *
522ecryptfs_dentry_to_lower_path(struct dentry *dentry)
523{
524 return &((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path;
525}
526
527#define ecryptfs_printk(type, fmt, arg...) \
528 __ecryptfs_printk(type "%s: " fmt, __func__, ## arg);
529__printf(1, 2)
530void __ecryptfs_printk(const char *fmt, ...);
531
532extern const struct file_operations ecryptfs_main_fops;
533extern const struct file_operations ecryptfs_dir_fops;
534extern const struct inode_operations ecryptfs_main_iops;
535extern const struct inode_operations ecryptfs_dir_iops;
536extern const struct inode_operations ecryptfs_symlink_iops;
537extern const struct super_operations ecryptfs_sops;
538extern const struct dentry_operations ecryptfs_dops;
539extern const struct address_space_operations ecryptfs_aops;
540extern int ecryptfs_verbosity;
541extern unsigned int ecryptfs_message_buf_len;
542extern signed long ecryptfs_message_wait_timeout;
543extern unsigned int ecryptfs_number_of_users;
544
545extern struct kmem_cache *ecryptfs_auth_tok_list_item_cache;
546extern struct kmem_cache *ecryptfs_file_info_cache;
547extern struct kmem_cache *ecryptfs_dentry_info_cache;
548extern struct kmem_cache *ecryptfs_inode_info_cache;
549extern struct kmem_cache *ecryptfs_sb_info_cache;
550extern struct kmem_cache *ecryptfs_header_cache;
551extern struct kmem_cache *ecryptfs_xattr_cache;
552extern struct kmem_cache *ecryptfs_key_record_cache;
553extern struct kmem_cache *ecryptfs_key_sig_cache;
554extern struct kmem_cache *ecryptfs_global_auth_tok_cache;
555extern struct kmem_cache *ecryptfs_key_tfm_cache;
556
557struct inode *ecryptfs_get_inode(struct inode *lower_inode,
558 struct super_block *sb);
559void ecryptfs_i_size_init(const char *page_virt, struct inode *inode);
560int ecryptfs_initialize_file(struct dentry *ecryptfs_dentry,
561 struct inode *ecryptfs_inode);
562int ecryptfs_decode_and_decrypt_filename(char **decrypted_name,
563 size_t *decrypted_name_size,
564 struct super_block *sb,
565 const char *name, size_t name_size);
566int ecryptfs_fill_zeros(struct file *file, loff_t new_length);
567int ecryptfs_encrypt_and_encode_filename(
568 char **encoded_name,
569 size_t *encoded_name_size,
570 struct ecryptfs_mount_crypt_stat *mount_crypt_stat,
571 const char *name, size_t name_size);
572struct dentry *ecryptfs_lower_dentry(struct dentry *this_dentry);
573void ecryptfs_dump_hex(char *data, int bytes);
574int virt_to_scatterlist(const void *addr, int size, struct scatterlist *sg,
575 int sg_size);
576int ecryptfs_compute_root_iv(struct ecryptfs_crypt_stat *crypt_stat);
577void ecryptfs_rotate_iv(unsigned char *iv);
578int ecryptfs_init_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat);
579void ecryptfs_destroy_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat);
580void ecryptfs_destroy_mount_crypt_stat(
581 struct ecryptfs_mount_crypt_stat *mount_crypt_stat);
582int ecryptfs_init_crypt_ctx(struct ecryptfs_crypt_stat *crypt_stat);
583int ecryptfs_write_inode_size_to_metadata(struct inode *ecryptfs_inode);
584int ecryptfs_encrypt_page(struct page *page);
585int ecryptfs_decrypt_page(struct page *page);
586int ecryptfs_write_metadata(struct dentry *ecryptfs_dentry,
587 struct inode *ecryptfs_inode);
588int ecryptfs_read_metadata(struct dentry *ecryptfs_dentry);
589int ecryptfs_new_file_context(struct inode *ecryptfs_inode);
590void ecryptfs_write_crypt_stat_flags(char *page_virt,
591 struct ecryptfs_crypt_stat *crypt_stat,
592 size_t *written);
593int ecryptfs_read_and_validate_header_region(struct inode *inode);
594int ecryptfs_read_and_validate_xattr_region(struct dentry *dentry,
595 struct inode *inode);
596u8 ecryptfs_code_for_cipher_string(char *cipher_name, size_t key_bytes);
597int ecryptfs_cipher_code_to_string(char *str, u8 cipher_code);
598void ecryptfs_set_default_sizes(struct ecryptfs_crypt_stat *crypt_stat);
599int ecryptfs_generate_key_packet_set(char *dest_base,
600 struct ecryptfs_crypt_stat *crypt_stat,
601 struct dentry *ecryptfs_dentry,
602 size_t *len, size_t max);
603int
604ecryptfs_parse_packet_set(struct ecryptfs_crypt_stat *crypt_stat,
605 unsigned char *src, struct dentry *ecryptfs_dentry);
606int ecryptfs_truncate(struct dentry *dentry, loff_t new_length);
607ssize_t
608ecryptfs_getxattr_lower(struct dentry *lower_dentry, struct inode *lower_inode,
609 const char *name, void *value, size_t size);
610int
611ecryptfs_setxattr(struct dentry *dentry, struct inode *inode, const char *name,
612 const void *value, size_t size, int flags);
613int ecryptfs_read_xattr_region(char *page_virt, struct inode *ecryptfs_inode);
614#ifdef CONFIG_ECRYPT_FS_MESSAGING
615int ecryptfs_process_response(struct ecryptfs_daemon *daemon,
616 struct ecryptfs_message *msg, u32 seq);
617int ecryptfs_send_message(char *data, int data_len,
618 struct ecryptfs_msg_ctx **msg_ctx);
619int ecryptfs_wait_for_response(struct ecryptfs_msg_ctx *msg_ctx,
620 struct ecryptfs_message **emsg);
621int ecryptfs_init_messaging(void);
622void ecryptfs_release_messaging(void);
623#else
624static inline int ecryptfs_init_messaging(void)
625{
626 return 0;
627}
628static inline void ecryptfs_release_messaging(void)
629{ }
630static inline int ecryptfs_send_message(char *data, int data_len,
631 struct ecryptfs_msg_ctx **msg_ctx)
632{
633 return -ENOTCONN;
634}
635static inline int ecryptfs_wait_for_response(struct ecryptfs_msg_ctx *msg_ctx,
636 struct ecryptfs_message **emsg)
637{
638 return -ENOMSG;
639}
640#endif
641
642void
643ecryptfs_write_header_metadata(char *virt,
644 struct ecryptfs_crypt_stat *crypt_stat,
645 size_t *written);
646int ecryptfs_add_keysig(struct ecryptfs_crypt_stat *crypt_stat, char *sig);
647int
648ecryptfs_add_global_auth_tok(struct ecryptfs_mount_crypt_stat *mount_crypt_stat,
649 char *sig, u32 global_auth_tok_flags);
650int ecryptfs_get_global_auth_tok_for_sig(
651 struct ecryptfs_global_auth_tok **global_auth_tok,
652 struct ecryptfs_mount_crypt_stat *mount_crypt_stat, char *sig);
653int
654ecryptfs_add_new_key_tfm(struct ecryptfs_key_tfm **key_tfm, char *cipher_name,
655 size_t key_size);
656int ecryptfs_init_crypto(void);
657int ecryptfs_destroy_crypto(void);
658int ecryptfs_tfm_exists(char *cipher_name, struct ecryptfs_key_tfm **key_tfm);
659int ecryptfs_get_tfm_and_mutex_for_cipher_name(struct crypto_skcipher **tfm,
660 struct mutex **tfm_mutex,
661 char *cipher_name);
662int ecryptfs_keyring_auth_tok_for_sig(struct key **auth_tok_key,
663 struct ecryptfs_auth_tok **auth_tok,
664 char *sig);
665int ecryptfs_write_lower(struct inode *ecryptfs_inode, char *data,
666 loff_t offset, size_t size);
667int ecryptfs_write_lower_page_segment(struct inode *ecryptfs_inode,
668 struct page *page_for_lower,
669 size_t offset_in_page, size_t size);
670int ecryptfs_write(struct inode *inode, char *data, loff_t offset, size_t size);
671int ecryptfs_read_lower(char *data, loff_t offset, size_t size,
672 struct inode *ecryptfs_inode);
673int ecryptfs_read_lower_page_segment(struct page *page_for_ecryptfs,
674 pgoff_t page_index,
675 size_t offset_in_page, size_t size,
676 struct inode *ecryptfs_inode);
677struct page *ecryptfs_get_locked_page(struct inode *inode, loff_t index);
678int ecryptfs_parse_packet_length(unsigned char *data, size_t *size,
679 size_t *length_size);
680int ecryptfs_write_packet_length(char *dest, size_t size,
681 size_t *packet_size_length);
682#ifdef CONFIG_ECRYPT_FS_MESSAGING
683int ecryptfs_init_ecryptfs_miscdev(void);
684void ecryptfs_destroy_ecryptfs_miscdev(void);
685int ecryptfs_send_miscdev(char *data, size_t data_size,
686 struct ecryptfs_msg_ctx *msg_ctx, u8 msg_type,
687 u16 msg_flags, struct ecryptfs_daemon *daemon);
688void ecryptfs_msg_ctx_alloc_to_free(struct ecryptfs_msg_ctx *msg_ctx);
689int
690ecryptfs_spawn_daemon(struct ecryptfs_daemon **daemon, struct file *file);
691int ecryptfs_exorcise_daemon(struct ecryptfs_daemon *daemon);
692int ecryptfs_find_daemon_by_euid(struct ecryptfs_daemon **daemon);
693#endif
694int ecryptfs_init_kthread(void);
695void ecryptfs_destroy_kthread(void);
696int ecryptfs_privileged_open(struct file **lower_file,
697 struct dentry *lower_dentry,
698 struct vfsmount *lower_mnt,
699 const struct cred *cred);
700int ecryptfs_get_lower_file(struct dentry *dentry, struct inode *inode);
701void ecryptfs_put_lower_file(struct inode *inode);
702int
703ecryptfs_write_tag_70_packet(char *dest, size_t *remaining_bytes,
704 size_t *packet_size,
705 struct ecryptfs_mount_crypt_stat *mount_crypt_stat,
706 char *filename, size_t filename_size);
707int
708ecryptfs_parse_tag_70_packet(char **filename, size_t *filename_size,
709 size_t *packet_size,
710 struct ecryptfs_mount_crypt_stat *mount_crypt_stat,
711 char *data, size_t max_packet_size);
712int ecryptfs_set_f_namelen(long *namelen, long lower_namelen,
713 struct ecryptfs_mount_crypt_stat *mount_crypt_stat);
714int ecryptfs_derive_iv(char *iv, struct ecryptfs_crypt_stat *crypt_stat,
715 loff_t offset);
716
717extern const struct xattr_handler *ecryptfs_xattr_handlers[];
718
719#endif
720
