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14#ifndef ECRYPTFS_KERNEL_H
15#define ECRYPTFS_KERNEL_H
16
17#include <crypto/skcipher.h>
18#include <keys/user-type.h>
19#include <keys/encrypted-type.h>
20#include <linux/kernel.h>
21#include <linux/fs.h>
22#include <linux/fs_stack.h>
23#include <linux/namei.h>
24#include <linux/scatterlist.h>
25#include <linux/hash.h>
26#include <linux/nsproxy.h>
27#include <linux/backing-dev.h>
28#include <linux/ecryptfs.h>
29
30#define ECRYPTFS_DEFAULT_IV_BYTES 16
31#define ECRYPTFS_DEFAULT_EXTENT_SIZE 4096
32#define ECRYPTFS_MINIMUM_HEADER_EXTENT_SIZE 8192
33#define ECRYPTFS_DEFAULT_MSG_CTX_ELEMS 32
34#define ECRYPTFS_DEFAULT_SEND_TIMEOUT HZ
35#define ECRYPTFS_MAX_MSG_CTX_TTL (HZ*3)
36#define ECRYPTFS_DEFAULT_NUM_USERS 4
37#define ECRYPTFS_MAX_NUM_USERS 32768
38#define ECRYPTFS_XATTR_NAME "user.ecryptfs"
39
40void ecryptfs_dump_auth_tok(struct ecryptfs_auth_tok *auth_tok);
41static inline void
42ecryptfs_to_hex(char *dst, char *src, size_t src_size)
43{
44 char *end = bin2hex(dst, src, src_size);
45 *end = '\0';
46}
47
48extern void ecryptfs_from_hex(char *dst, char *src, int dst_size);
49
50struct ecryptfs_key_record {
51 unsigned char type;
52 size_t enc_key_size;
53 unsigned char sig[ECRYPTFS_SIG_SIZE];
54 unsigned char enc_key[ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES];
55};
56
57struct ecryptfs_auth_tok_list {
58 struct ecryptfs_auth_tok *auth_tok;
59 struct list_head list;
60};
61
62struct ecryptfs_crypt_stat;
63struct ecryptfs_mount_crypt_stat;
64
65struct ecryptfs_page_crypt_context {
66 struct page *page;
67#define ECRYPTFS_PREPARE_COMMIT_MODE 0
68#define ECRYPTFS_WRITEPAGE_MODE 1
69 unsigned int mode;
70 union {
71 struct file *lower_file;
72 struct writeback_control *wbc;
73 } param;
74};
75
76#if defined(CONFIG_ENCRYPTED_KEYS) || defined(CONFIG_ENCRYPTED_KEYS_MODULE)
77static inline struct ecryptfs_auth_tok *
78ecryptfs_get_encrypted_key_payload_data(struct key *key)
79{
80 struct encrypted_key_payload *payload;
81
82 if (key->type != &key_type_encrypted)
83 return NULL;
84
85 payload = key->payload.data[0];
86 if (!payload)
87 return ERR_PTR(-EKEYREVOKED);
88
89 return (struct ecryptfs_auth_tok *)payload->payload_data;
90}
91
92static inline struct key *ecryptfs_get_encrypted_key(char *sig)
93{
94 return request_key(&key_type_encrypted, sig, NULL);
95}
96
97#else
98static inline struct ecryptfs_auth_tok *
99ecryptfs_get_encrypted_key_payload_data(struct key *key)
100{
101 return NULL;
102}
103
104static inline struct key *ecryptfs_get_encrypted_key(char *sig)
105{
106 return ERR_PTR(-ENOKEY);
107}
108
109#endif
110
111static inline struct ecryptfs_auth_tok *
112ecryptfs_get_key_payload_data(struct key *key)
113{
114 struct ecryptfs_auth_tok *auth_tok;
115 struct user_key_payload *ukp;
116
117 auth_tok = ecryptfs_get_encrypted_key_payload_data(key);
118 if (auth_tok)
119 return auth_tok;
120
121 ukp = user_key_payload_locked(key);
122 if (!ukp)
123 return ERR_PTR(-EKEYREVOKED);
124
125 return (struct ecryptfs_auth_tok *)ukp->data;
126}
127
128#define ECRYPTFS_MAX_KEYSET_SIZE 1024
129#define ECRYPTFS_MAX_CIPHER_NAME_SIZE 31
130#define ECRYPTFS_MAX_NUM_ENC_KEYS 64
131#define ECRYPTFS_MAX_IV_BYTES 16
132#define ECRYPTFS_SALT_BYTES 2
133#define MAGIC_ECRYPTFS_MARKER 0x3c81b7f5
134#define MAGIC_ECRYPTFS_MARKER_SIZE_BYTES 8
135#define ECRYPTFS_FILE_SIZE_BYTES (sizeof(u64))
136#define ECRYPTFS_SIZE_AND_MARKER_BYTES (ECRYPTFS_FILE_SIZE_BYTES \
137 + MAGIC_ECRYPTFS_MARKER_SIZE_BYTES)
138#define ECRYPTFS_DEFAULT_CIPHER "aes"
139#define ECRYPTFS_DEFAULT_KEY_BYTES 16
140#define ECRYPTFS_DEFAULT_HASH "md5"
141#define ECRYPTFS_TAG_70_DIGEST ECRYPTFS_DEFAULT_HASH
142#define ECRYPTFS_TAG_1_PACKET_TYPE 0x01
143#define ECRYPTFS_TAG_3_PACKET_TYPE 0x8C
144#define ECRYPTFS_TAG_11_PACKET_TYPE 0xED
145#define ECRYPTFS_TAG_64_PACKET_TYPE 0x40
146#define ECRYPTFS_TAG_65_PACKET_TYPE 0x41
147#define ECRYPTFS_TAG_66_PACKET_TYPE 0x42
148#define ECRYPTFS_TAG_67_PACKET_TYPE 0x43
149#define ECRYPTFS_TAG_70_PACKET_TYPE 0x46
150
151#define ECRYPTFS_TAG_71_PACKET_TYPE 0x47
152
153#define ECRYPTFS_TAG_72_PACKET_TYPE 0x48
154
155#define ECRYPTFS_TAG_73_PACKET_TYPE 0x49
156
157#define ECRYPTFS_MIN_PKT_LEN_SIZE 1
158#define ECRYPTFS_MAX_PKT_LEN_SIZE 2
159
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162
163
164#define ECRYPTFS_FILENAME_MIN_RANDOM_PREPEND_BYTES 16
165#define ECRYPTFS_NON_NULL 0x42
166#define MD5_DIGEST_SIZE 16
167#define ECRYPTFS_TAG_70_DIGEST_SIZE MD5_DIGEST_SIZE
168#define ECRYPTFS_TAG_70_MIN_METADATA_SIZE (1 + ECRYPTFS_MIN_PKT_LEN_SIZE \
169 + ECRYPTFS_SIG_SIZE + 1 + 1)
170#define ECRYPTFS_TAG_70_MAX_METADATA_SIZE (1 + ECRYPTFS_MAX_PKT_LEN_SIZE \
171 + ECRYPTFS_SIG_SIZE + 1 + 1)
172#define ECRYPTFS_FEK_ENCRYPTED_FILENAME_PREFIX "ECRYPTFS_FEK_ENCRYPTED."
173#define ECRYPTFS_FEK_ENCRYPTED_FILENAME_PREFIX_SIZE 23
174#define ECRYPTFS_FNEK_ENCRYPTED_FILENAME_PREFIX "ECRYPTFS_FNEK_ENCRYPTED."
175#define ECRYPTFS_FNEK_ENCRYPTED_FILENAME_PREFIX_SIZE 24
176#define ECRYPTFS_ENCRYPTED_DENTRY_NAME_LEN (18 + 1 + 4 + 1 + 32)
177
178#ifdef CONFIG_ECRYPT_FS_MESSAGING
179# define ECRYPTFS_VERSIONING_MASK_MESSAGING (ECRYPTFS_VERSIONING_DEVMISC \
180 | ECRYPTFS_VERSIONING_PUBKEY)
181#else
182# define ECRYPTFS_VERSIONING_MASK_MESSAGING 0
183#endif
184
185#define ECRYPTFS_VERSIONING_MASK (ECRYPTFS_VERSIONING_PASSPHRASE \
186 | ECRYPTFS_VERSIONING_PLAINTEXT_PASSTHROUGH \
187 | ECRYPTFS_VERSIONING_XATTR \
188 | ECRYPTFS_VERSIONING_MULTKEY \
189 | ECRYPTFS_VERSIONING_MASK_MESSAGING \
190 | ECRYPTFS_VERSIONING_FILENAME_ENCRYPTION)
191struct ecryptfs_key_sig {
192 struct list_head crypt_stat_list;
193 char keysig[ECRYPTFS_SIG_SIZE_HEX + 1];
194};
195
196struct ecryptfs_filename {
197 struct list_head crypt_stat_list;
198#define ECRYPTFS_FILENAME_CONTAINS_DECRYPTED 0x00000001
199 u32 flags;
200 u32 seq_no;
201 char *filename;
202 char *encrypted_filename;
203 size_t filename_size;
204 size_t encrypted_filename_size;
205 char fnek_sig[ECRYPTFS_SIG_SIZE_HEX];
206 char dentry_name[ECRYPTFS_ENCRYPTED_DENTRY_NAME_LEN + 1];
207};
208
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213
214struct ecryptfs_crypt_stat {
215#define ECRYPTFS_STRUCT_INITIALIZED 0x00000001
216#define ECRYPTFS_POLICY_APPLIED 0x00000002
217#define ECRYPTFS_ENCRYPTED 0x00000004
218#define ECRYPTFS_SECURITY_WARNING 0x00000008
219#define ECRYPTFS_ENABLE_HMAC 0x00000010
220#define ECRYPTFS_ENCRYPT_IV_PAGES 0x00000020
221#define ECRYPTFS_KEY_VALID 0x00000040
222#define ECRYPTFS_METADATA_IN_XATTR 0x00000080
223#define ECRYPTFS_VIEW_AS_ENCRYPTED 0x00000100
224#define ECRYPTFS_KEY_SET 0x00000200
225#define ECRYPTFS_ENCRYPT_FILENAMES 0x00000400
226#define ECRYPTFS_ENCFN_USE_MOUNT_FNEK 0x00000800
227#define ECRYPTFS_ENCFN_USE_FEK 0x00001000
228#define ECRYPTFS_UNLINK_SIGS 0x00002000
229#define ECRYPTFS_I_SIZE_INITIALIZED 0x00004000
230 u32 flags;
231 unsigned int file_version;
232 size_t iv_bytes;
233 size_t metadata_size;
234 size_t extent_size;
235 size_t key_size;
236 size_t extent_shift;
237 unsigned int extent_mask;
238 struct ecryptfs_mount_crypt_stat *mount_crypt_stat;
239 struct crypto_skcipher *tfm;
240 struct crypto_shash *hash_tfm;
241
242 unsigned char cipher[ECRYPTFS_MAX_CIPHER_NAME_SIZE + 1];
243 unsigned char key[ECRYPTFS_MAX_KEY_BYTES];
244 unsigned char root_iv[ECRYPTFS_MAX_IV_BYTES];
245 struct list_head keysig_list;
246 struct mutex keysig_list_mutex;
247 struct mutex cs_tfm_mutex;
248 struct mutex cs_mutex;
249};
250
251
252struct ecryptfs_inode_info {
253 struct inode vfs_inode;
254 struct inode *wii_inode;
255 struct mutex lower_file_mutex;
256 atomic_t lower_file_count;
257 struct file *lower_file;
258 struct ecryptfs_crypt_stat crypt_stat;
259};
260
261
262
263struct ecryptfs_dentry_info {
264 struct path lower_path;
265 union {
266 struct ecryptfs_crypt_stat *crypt_stat;
267 struct rcu_head rcu;
268 };
269};
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290struct ecryptfs_global_auth_tok {
291#define ECRYPTFS_AUTH_TOK_INVALID 0x00000001
292#define ECRYPTFS_AUTH_TOK_FNEK 0x00000002
293 u32 flags;
294 struct list_head mount_crypt_stat_list;
295 struct key *global_auth_tok_key;
296 unsigned char sig[ECRYPTFS_SIG_SIZE_HEX + 1];
297};
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312
313struct ecryptfs_key_tfm {
314 struct crypto_skcipher *key_tfm;
315 size_t key_size;
316 struct mutex key_tfm_mutex;
317 struct list_head key_tfm_list;
318 unsigned char cipher_name[ECRYPTFS_MAX_CIPHER_NAME_SIZE + 1];
319};
320
321extern struct mutex key_tfm_list_mutex;
322
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328
329struct ecryptfs_mount_crypt_stat {
330
331#define ECRYPTFS_PLAINTEXT_PASSTHROUGH_ENABLED 0x00000001
332#define ECRYPTFS_XATTR_METADATA_ENABLED 0x00000002
333#define ECRYPTFS_ENCRYPTED_VIEW_ENABLED 0x00000004
334#define ECRYPTFS_MOUNT_CRYPT_STAT_INITIALIZED 0x00000008
335#define ECRYPTFS_GLOBAL_ENCRYPT_FILENAMES 0x00000010
336#define ECRYPTFS_GLOBAL_ENCFN_USE_MOUNT_FNEK 0x00000020
337#define ECRYPTFS_GLOBAL_ENCFN_USE_FEK 0x00000040
338#define ECRYPTFS_GLOBAL_MOUNT_AUTH_TOK_ONLY 0x00000080
339 u32 flags;
340 struct list_head global_auth_tok_list;
341 struct mutex global_auth_tok_list_mutex;
342 size_t global_default_cipher_key_size;
343 size_t global_default_fn_cipher_key_bytes;
344 unsigned char global_default_cipher_name[ECRYPTFS_MAX_CIPHER_NAME_SIZE
345 + 1];
346 unsigned char global_default_fn_cipher_name[
347 ECRYPTFS_MAX_CIPHER_NAME_SIZE + 1];
348 char global_default_fnek_sig[ECRYPTFS_SIG_SIZE_HEX + 1];
349};
350
351
352struct ecryptfs_sb_info {
353 struct super_block *wsi_sb;
354 struct ecryptfs_mount_crypt_stat mount_crypt_stat;
355};
356
357
358struct ecryptfs_file_info {
359 struct file *wfi_file;
360 struct ecryptfs_crypt_stat *crypt_stat;
361};
362
363
364struct ecryptfs_auth_tok_list_item {
365 unsigned char encrypted_session_key[ECRYPTFS_MAX_KEY_BYTES];
366 struct list_head list;
367 struct ecryptfs_auth_tok auth_tok;
368};
369
370struct ecryptfs_message {
371
372
373
374 u32 index;
375 u32 data_len;
376 u8 data[];
377};
378
379struct ecryptfs_msg_ctx {
380#define ECRYPTFS_MSG_CTX_STATE_FREE 0x01
381#define ECRYPTFS_MSG_CTX_STATE_PENDING 0x02
382#define ECRYPTFS_MSG_CTX_STATE_DONE 0x03
383#define ECRYPTFS_MSG_CTX_STATE_NO_REPLY 0x04
384 u8 state;
385#define ECRYPTFS_MSG_HELO 100
386#define ECRYPTFS_MSG_QUIT 101
387#define ECRYPTFS_MSG_REQUEST 102
388#define ECRYPTFS_MSG_RESPONSE 103
389 u8 type;
390 u32 index;
391
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395
396 u32 counter;
397 size_t msg_size;
398 struct ecryptfs_message *msg;
399 struct task_struct *task;
400 struct list_head node;
401 struct list_head daemon_out_list;
402 struct mutex mux;
403};
404
405struct ecryptfs_daemon {
406#define ECRYPTFS_DAEMON_IN_READ 0x00000001
407#define ECRYPTFS_DAEMON_IN_POLL 0x00000002
408#define ECRYPTFS_DAEMON_ZOMBIE 0x00000004
409#define ECRYPTFS_DAEMON_MISCDEV_OPEN 0x00000008
410 u32 flags;
411 u32 num_queued_msg_ctx;
412 struct file *file;
413 struct mutex mux;
414 struct list_head msg_ctx_out_queue;
415 wait_queue_head_t wait;
416 struct hlist_node euid_chain;
417};
418
419#ifdef CONFIG_ECRYPT_FS_MESSAGING
420extern struct mutex ecryptfs_daemon_hash_mux;
421#endif
422
423static inline size_t
424ecryptfs_lower_header_size(struct ecryptfs_crypt_stat *crypt_stat)
425{
426 if (crypt_stat->flags & ECRYPTFS_METADATA_IN_XATTR)
427 return 0;
428 return crypt_stat->metadata_size;
429}
430
431static inline struct ecryptfs_file_info *
432ecryptfs_file_to_private(struct file *file)
433{
434 return file->private_data;
435}
436
437static inline void
438ecryptfs_set_file_private(struct file *file,
439 struct ecryptfs_file_info *file_info)
440{
441 file->private_data = file_info;
442}
443
444static inline struct file *ecryptfs_file_to_lower(struct file *file)
445{
446 return ((struct ecryptfs_file_info *)file->private_data)->wfi_file;
447}
448
449static inline void
450ecryptfs_set_file_lower(struct file *file, struct file *lower_file)
451{
452 ((struct ecryptfs_file_info *)file->private_data)->wfi_file =
453 lower_file;
454}
455
456static inline struct ecryptfs_inode_info *
457ecryptfs_inode_to_private(struct inode *inode)
458{
459 return container_of(inode, struct ecryptfs_inode_info, vfs_inode);
460}
461
462static inline struct inode *ecryptfs_inode_to_lower(struct inode *inode)
463{
464 return ecryptfs_inode_to_private(inode)->wii_inode;
465}
466
467static inline void
468ecryptfs_set_inode_lower(struct inode *inode, struct inode *lower_inode)
469{
470 ecryptfs_inode_to_private(inode)->wii_inode = lower_inode;
471}
472
473static inline struct ecryptfs_sb_info *
474ecryptfs_superblock_to_private(struct super_block *sb)
475{
476 return (struct ecryptfs_sb_info *)sb->s_fs_info;
477}
478
479static inline void
480ecryptfs_set_superblock_private(struct super_block *sb,
481 struct ecryptfs_sb_info *sb_info)
482{
483 sb->s_fs_info = sb_info;
484}
485
486static inline struct super_block *
487ecryptfs_superblock_to_lower(struct super_block *sb)
488{
489 return ((struct ecryptfs_sb_info *)sb->s_fs_info)->wsi_sb;
490}
491
492static inline void
493ecryptfs_set_superblock_lower(struct super_block *sb,
494 struct super_block *lower_sb)
495{
496 ((struct ecryptfs_sb_info *)sb->s_fs_info)->wsi_sb = lower_sb;
497}
498
499static inline struct ecryptfs_dentry_info *
500ecryptfs_dentry_to_private(struct dentry *dentry)
501{
502 return (struct ecryptfs_dentry_info *)dentry->d_fsdata;
503}
504
505static inline void
506ecryptfs_set_dentry_private(struct dentry *dentry,
507 struct ecryptfs_dentry_info *dentry_info)
508{
509 dentry->d_fsdata = dentry_info;
510}
511
512static inline struct dentry *
513ecryptfs_dentry_to_lower(struct dentry *dentry)
514{
515 return ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.dentry;
516}
517
518static inline struct vfsmount *
519ecryptfs_dentry_to_lower_mnt(struct dentry *dentry)
520{
521 return ((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path.mnt;
522}
523
524static inline struct path *
525ecryptfs_dentry_to_lower_path(struct dentry *dentry)
526{
527 return &((struct ecryptfs_dentry_info *)dentry->d_fsdata)->lower_path;
528}
529
530#define ecryptfs_printk(type, fmt, arg...) \
531 __ecryptfs_printk(type "%s: " fmt, __func__, ## arg);
532__printf(1, 2)
533void __ecryptfs_printk(const char *fmt, ...);
534
535extern const struct file_operations ecryptfs_main_fops;
536extern const struct file_operations ecryptfs_dir_fops;
537extern const struct inode_operations ecryptfs_main_iops;
538extern const struct inode_operations ecryptfs_dir_iops;
539extern const struct inode_operations ecryptfs_symlink_iops;
540extern const struct super_operations ecryptfs_sops;
541extern const struct dentry_operations ecryptfs_dops;
542extern const struct address_space_operations ecryptfs_aops;
543extern int ecryptfs_verbosity;
544extern unsigned int ecryptfs_message_buf_len;
545extern signed long ecryptfs_message_wait_timeout;
546extern unsigned int ecryptfs_number_of_users;
547
548extern struct kmem_cache *ecryptfs_auth_tok_list_item_cache;
549extern struct kmem_cache *ecryptfs_file_info_cache;
550extern struct kmem_cache *ecryptfs_dentry_info_cache;
551extern struct kmem_cache *ecryptfs_inode_info_cache;
552extern struct kmem_cache *ecryptfs_sb_info_cache;
553extern struct kmem_cache *ecryptfs_header_cache;
554extern struct kmem_cache *ecryptfs_xattr_cache;
555extern struct kmem_cache *ecryptfs_key_record_cache;
556extern struct kmem_cache *ecryptfs_key_sig_cache;
557extern struct kmem_cache *ecryptfs_global_auth_tok_cache;
558extern struct kmem_cache *ecryptfs_key_tfm_cache;
559
560struct inode *ecryptfs_get_inode(struct inode *lower_inode,
561 struct super_block *sb);
562void ecryptfs_i_size_init(const char *page_virt, struct inode *inode);
563int ecryptfs_initialize_file(struct dentry *ecryptfs_dentry,
564 struct inode *ecryptfs_inode);
565int ecryptfs_decode_and_decrypt_filename(char **decrypted_name,
566 size_t *decrypted_name_size,
567 struct super_block *sb,
568 const char *name, size_t name_size);
569int ecryptfs_fill_zeros(struct file *file, loff_t new_length);
570int ecryptfs_encrypt_and_encode_filename(
571 char **encoded_name,
572 size_t *encoded_name_size,
573 struct ecryptfs_mount_crypt_stat *mount_crypt_stat,
574 const char *name, size_t name_size);
575struct dentry *ecryptfs_lower_dentry(struct dentry *this_dentry);
576void ecryptfs_dump_hex(char *data, int bytes);
577int virt_to_scatterlist(const void *addr, int size, struct scatterlist *sg,
578 int sg_size);
579int ecryptfs_compute_root_iv(struct ecryptfs_crypt_stat *crypt_stat);
580void ecryptfs_rotate_iv(unsigned char *iv);
581int ecryptfs_init_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat);
582void ecryptfs_destroy_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat);
583void ecryptfs_destroy_mount_crypt_stat(
584 struct ecryptfs_mount_crypt_stat *mount_crypt_stat);
585int ecryptfs_init_crypt_ctx(struct ecryptfs_crypt_stat *crypt_stat);
586int ecryptfs_write_inode_size_to_metadata(struct inode *ecryptfs_inode);
587int ecryptfs_encrypt_page(struct page *page);
588int ecryptfs_decrypt_page(struct page *page);
589int ecryptfs_write_metadata(struct dentry *ecryptfs_dentry,
590 struct inode *ecryptfs_inode);
591int ecryptfs_read_metadata(struct dentry *ecryptfs_dentry);
592int ecryptfs_new_file_context(struct inode *ecryptfs_inode);
593void ecryptfs_write_crypt_stat_flags(char *page_virt,
594 struct ecryptfs_crypt_stat *crypt_stat,
595 size_t *written);
596int ecryptfs_read_and_validate_header_region(struct inode *inode);
597int ecryptfs_read_and_validate_xattr_region(struct dentry *dentry,
598 struct inode *inode);
599u8 ecryptfs_code_for_cipher_string(char *cipher_name, size_t key_bytes);
600int ecryptfs_cipher_code_to_string(char *str, u8 cipher_code);
601void ecryptfs_set_default_sizes(struct ecryptfs_crypt_stat *crypt_stat);
602int ecryptfs_generate_key_packet_set(char *dest_base,
603 struct ecryptfs_crypt_stat *crypt_stat,
604 struct dentry *ecryptfs_dentry,
605 size_t *len, size_t max);
606int
607ecryptfs_parse_packet_set(struct ecryptfs_crypt_stat *crypt_stat,
608 unsigned char *src, struct dentry *ecryptfs_dentry);
609int ecryptfs_truncate(struct dentry *dentry, loff_t new_length);
610ssize_t
611ecryptfs_getxattr_lower(struct dentry *lower_dentry, struct inode *lower_inode,
612 const char *name, void *value, size_t size);
613int
614ecryptfs_setxattr(struct dentry *dentry, struct inode *inode, const char *name,
615 const void *value, size_t size, int flags);
616int ecryptfs_read_xattr_region(char *page_virt, struct inode *ecryptfs_inode);
617#ifdef CONFIG_ECRYPT_FS_MESSAGING
618int ecryptfs_process_response(struct ecryptfs_daemon *daemon,
619 struct ecryptfs_message *msg, u32 seq);
620int ecryptfs_send_message(char *data, int data_len,
621 struct ecryptfs_msg_ctx **msg_ctx);
622int ecryptfs_wait_for_response(struct ecryptfs_msg_ctx *msg_ctx,
623 struct ecryptfs_message **emsg);
624int ecryptfs_init_messaging(void);
625void ecryptfs_release_messaging(void);
626#else
627static inline int ecryptfs_init_messaging(void)
628{
629 return 0;
630}
631static inline void ecryptfs_release_messaging(void)
632{ }
633static inline int ecryptfs_send_message(char *data, int data_len,
634 struct ecryptfs_msg_ctx **msg_ctx)
635{
636 return -ENOTCONN;
637}
638static inline int ecryptfs_wait_for_response(struct ecryptfs_msg_ctx *msg_ctx,
639 struct ecryptfs_message **emsg)
640{
641 return -ENOMSG;
642}
643#endif
644
645void
646ecryptfs_write_header_metadata(char *virt,
647 struct ecryptfs_crypt_stat *crypt_stat,
648 size_t *written);
649int ecryptfs_add_keysig(struct ecryptfs_crypt_stat *crypt_stat, char *sig);
650int
651ecryptfs_add_global_auth_tok(struct ecryptfs_mount_crypt_stat *mount_crypt_stat,
652 char *sig, u32 global_auth_tok_flags);
653int ecryptfs_get_global_auth_tok_for_sig(
654 struct ecryptfs_global_auth_tok **global_auth_tok,
655 struct ecryptfs_mount_crypt_stat *mount_crypt_stat, char *sig);
656int
657ecryptfs_add_new_key_tfm(struct ecryptfs_key_tfm **key_tfm, char *cipher_name,
658 size_t key_size);
659int ecryptfs_init_crypto(void);
660int ecryptfs_destroy_crypto(void);
661int ecryptfs_tfm_exists(char *cipher_name, struct ecryptfs_key_tfm **key_tfm);
662int ecryptfs_get_tfm_and_mutex_for_cipher_name(struct crypto_skcipher **tfm,
663 struct mutex **tfm_mutex,
664 char *cipher_name);
665int ecryptfs_keyring_auth_tok_for_sig(struct key **auth_tok_key,
666 struct ecryptfs_auth_tok **auth_tok,
667 char *sig);
668int ecryptfs_write_lower(struct inode *ecryptfs_inode, char *data,
669 loff_t offset, size_t size);
670int ecryptfs_write_lower_page_segment(struct inode *ecryptfs_inode,
671 struct page *page_for_lower,
672 size_t offset_in_page, size_t size);
673int ecryptfs_write(struct inode *inode, char *data, loff_t offset, size_t size);
674int ecryptfs_read_lower(char *data, loff_t offset, size_t size,
675 struct inode *ecryptfs_inode);
676int ecryptfs_read_lower_page_segment(struct page *page_for_ecryptfs,
677 pgoff_t page_index,
678 size_t offset_in_page, size_t size,
679 struct inode *ecryptfs_inode);
680struct page *ecryptfs_get_locked_page(struct inode *inode, loff_t index);
681int ecryptfs_parse_packet_length(unsigned char *data, size_t *size,
682 size_t *length_size);
683int ecryptfs_write_packet_length(char *dest, size_t size,
684 size_t *packet_size_length);
685#ifdef CONFIG_ECRYPT_FS_MESSAGING
686int ecryptfs_init_ecryptfs_miscdev(void);
687void ecryptfs_destroy_ecryptfs_miscdev(void);
688int ecryptfs_send_miscdev(char *data, size_t data_size,
689 struct ecryptfs_msg_ctx *msg_ctx, u8 msg_type,
690 u16 msg_flags, struct ecryptfs_daemon *daemon);
691void ecryptfs_msg_ctx_alloc_to_free(struct ecryptfs_msg_ctx *msg_ctx);
692int
693ecryptfs_spawn_daemon(struct ecryptfs_daemon **daemon, struct file *file);
694int ecryptfs_exorcise_daemon(struct ecryptfs_daemon *daemon);
695int ecryptfs_find_daemon_by_euid(struct ecryptfs_daemon **daemon);
696#endif
697int ecryptfs_init_kthread(void);
698void ecryptfs_destroy_kthread(void);
699int ecryptfs_privileged_open(struct file **lower_file,
700 struct dentry *lower_dentry,
701 struct vfsmount *lower_mnt,
702 const struct cred *cred);
703int ecryptfs_get_lower_file(struct dentry *dentry, struct inode *inode);
704void ecryptfs_put_lower_file(struct inode *inode);
705int
706ecryptfs_write_tag_70_packet(char *dest, size_t *remaining_bytes,
707 size_t *packet_size,
708 struct ecryptfs_mount_crypt_stat *mount_crypt_stat,
709 char *filename, size_t filename_size);
710int
711ecryptfs_parse_tag_70_packet(char **filename, size_t *filename_size,
712 size_t *packet_size,
713 struct ecryptfs_mount_crypt_stat *mount_crypt_stat,
714 char *data, size_t max_packet_size);
715int ecryptfs_set_f_namelen(long *namelen, long lower_namelen,
716 struct ecryptfs_mount_crypt_stat *mount_crypt_stat);
717int ecryptfs_derive_iv(char *iv, struct ecryptfs_crypt_stat *crypt_stat,
718 loff_t offset);
719
720extern const struct xattr_handler *ecryptfs_xattr_handlers[];
721
722#endif
723
