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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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#ifndef ECRYPTFS_KERNEL_H#define ECRYPTFS_KERNEL_H
#include <crypto/md5.h>#include <crypto/skcipher.h>#include <keys/user-type.h>#include <keys/encrypted-type.h>#include <linux/kernel.h>#include <linux/fs.h>#include <linux/fs_stack.h>#include <linux/hex.h>#include <linux/namei.h>#include <linux/scatterlist.h>#include <linux/hash.h>#include <linux/nsproxy.h>#include <linux/backing-dev.h>#include <linux/ecryptfs.h>
#define ECRYPTFS_DEFAULT_IV_BYTES 16#define ECRYPTFS_DEFAULT_EXTENT_SIZE 4096#define ECRYPTFS_MINIMUM_HEADER_EXTENT_SIZE 8192#define ECRYPTFS_DEFAULT_MSG_CTX_ELEMS 32#define ECRYPTFS_DEFAULT_SEND_TIMEOUT HZ#define ECRYPTFS_MAX_MSG_CTX_TTL (HZ*3)#define ECRYPTFS_DEFAULT_NUM_USERS 4#define ECRYPTFS_MAX_NUM_USERS 32768#define ECRYPTFS_XATTR_NAME "user.ecryptfs"
void ecryptfs_dump_auth_tok(struct ecryptfs_auth_tok *auth_tok);static inline voidecryptfs_to_hex(char *dst, char *src, size_t src_size){ char *end = bin2hex(dst, src, src_size); *end = '\0';}
extern void ecryptfs_from_hex(char *dst, char *src, int dst_size);
struct ecryptfs_key_record { unsigned char type; size_t enc_key_size; unsigned char sig[ECRYPTFS_SIG_SIZE]; unsigned char enc_key[ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES];};
struct ecryptfs_auth_tok_list { struct ecryptfs_auth_tok *auth_tok; struct list_head list;};
struct ecryptfs_crypt_stat;struct ecryptfs_mount_crypt_stat;
struct ecryptfs_page_crypt_context { struct page *page;#define ECRYPTFS_PREPARE_COMMIT_MODE 0#define ECRYPTFS_WRITEPAGE_MODE 1 unsigned int mode; union { struct file *lower_file; struct writeback_control *wbc; } param;};
#if defined(CONFIG_ENCRYPTED_KEYS) || defined(CONFIG_ENCRYPTED_KEYS_MODULE)static inline struct ecryptfs_auth_tok *ecryptfs_get_encrypted_key_payload_data(struct key *key){ struct encrypted_key_payload *payload;
if (key->type != &key_type_encrypted) return NULL;
payload = key->payload.data[0]; if (!payload) return ERR_PTR(-EKEYREVOKED);
return (struct ecryptfs_auth_tok *)payload->payload_data;}
static inline struct key *ecryptfs_get_encrypted_key(char *sig){ return request_key(&key_type_encrypted, sig, NULL);}
#elsestatic inline struct ecryptfs_auth_tok *ecryptfs_get_encrypted_key_payload_data(struct key *key){ return NULL;}
static inline struct key *ecryptfs_get_encrypted_key(char *sig){ return ERR_PTR(-ENOKEY);}
#endif /* CONFIG_ENCRYPTED_KEYS */
static inline struct ecryptfs_auth_tok *ecryptfs_get_key_payload_data(struct key *key){ struct ecryptfs_auth_tok *auth_tok; struct user_key_payload *ukp;
auth_tok = ecryptfs_get_encrypted_key_payload_data(key); if (auth_tok) return auth_tok;
ukp = user_key_payload_locked(key); if (!ukp) return ERR_PTR(-EKEYREVOKED);
return (struct ecryptfs_auth_tok *)ukp->data;}
#define ECRYPTFS_MAX_KEYSET_SIZE 1024#define ECRYPTFS_MAX_CIPHER_NAME_SIZE 31#define ECRYPTFS_MAX_NUM_ENC_KEYS 64#define ECRYPTFS_MAX_IV_BYTES 16 /* 128 bits */#define ECRYPTFS_SALT_BYTES 2#define MAGIC_ECRYPTFS_MARKER 0x3c81b7f5#define MAGIC_ECRYPTFS_MARKER_SIZE_BYTES 8 /* 4*2 */#define ECRYPTFS_FILE_SIZE_BYTES (sizeof(u64))#define ECRYPTFS_SIZE_AND_MARKER_BYTES (ECRYPTFS_FILE_SIZE_BYTES \ + MAGIC_ECRYPTFS_MARKER_SIZE_BYTES)#define ECRYPTFS_DEFAULT_CIPHER "aes"#define ECRYPTFS_DEFAULT_KEY_BYTES 16#define ECRYPTFS_TAG_1_PACKET_TYPE 0x01#define ECRYPTFS_TAG_3_PACKET_TYPE 0x8C#define ECRYPTFS_TAG_11_PACKET_TYPE 0xED#define ECRYPTFS_TAG_64_PACKET_TYPE 0x40#define ECRYPTFS_TAG_65_PACKET_TYPE 0x41#define ECRYPTFS_TAG_66_PACKET_TYPE 0x42#define ECRYPTFS_TAG_67_PACKET_TYPE 0x43#define ECRYPTFS_TAG_70_PACKET_TYPE 0x46 /* FNEK-encrypted filename * as dentry name */#define ECRYPTFS_TAG_71_PACKET_TYPE 0x47 /* FNEK-encrypted filename in * metadata */#define ECRYPTFS_TAG_72_PACKET_TYPE 0x48 /* FEK-encrypted filename as * dentry name */#define ECRYPTFS_TAG_73_PACKET_TYPE 0x49 /* FEK-encrypted filename as * metadata */#define ECRYPTFS_MIN_PKT_LEN_SIZE 1 /* Min size to specify packet length */#define ECRYPTFS_MAX_PKT_LEN_SIZE 2 /* Pass at least this many bytes to * ecryptfs_parse_packet_length() and * ecryptfs_write_packet_length() *//* Constraint: ECRYPTFS_FILENAME_MIN_RANDOM_PREPEND_BYTES >= * ECRYPTFS_MAX_IV_BYTES */#define ECRYPTFS_FILENAME_MIN_RANDOM_PREPEND_BYTES 16#define ECRYPTFS_NON_NULL 0x42 /* A reasonable substitute for NULL */#define ECRYPTFS_TAG_70_MIN_METADATA_SIZE (1 + ECRYPTFS_MIN_PKT_LEN_SIZE \ + ECRYPTFS_SIG_SIZE + 1 + 1)#define ECRYPTFS_TAG_70_MAX_METADATA_SIZE (1 + ECRYPTFS_MAX_PKT_LEN_SIZE \ + ECRYPTFS_SIG_SIZE + 1 + 1)#define ECRYPTFS_FEK_ENCRYPTED_FILENAME_PREFIX "ECRYPTFS_FEK_ENCRYPTED."#define ECRYPTFS_FEK_ENCRYPTED_FILENAME_PREFIX_SIZE 23#define ECRYPTFS_FNEK_ENCRYPTED_FILENAME_PREFIX "ECRYPTFS_FNEK_ENCRYPTED."#define ECRYPTFS_FNEK_ENCRYPTED_FILENAME_PREFIX_SIZE 24#define ECRYPTFS_ENCRYPTED_DENTRY_NAME_LEN (18 + 1 + 4 + 1 + 32)
#ifdef CONFIG_ECRYPT_FS_MESSAGING# define ECRYPTFS_VERSIONING_MASK_MESSAGING (ECRYPTFS_VERSIONING_DEVMISC \ | ECRYPTFS_VERSIONING_PUBKEY)#else# define ECRYPTFS_VERSIONING_MASK_MESSAGING 0#endif
#define ECRYPTFS_VERSIONING_MASK (ECRYPTFS_VERSIONING_PASSPHRASE \ | ECRYPTFS_VERSIONING_PLAINTEXT_PASSTHROUGH \ | ECRYPTFS_VERSIONING_XATTR \ | ECRYPTFS_VERSIONING_MULTKEY \ | ECRYPTFS_VERSIONING_MASK_MESSAGING \ | ECRYPTFS_VERSIONING_FILENAME_ENCRYPTION)struct ecryptfs_key_sig { struct list_head crypt_stat_list; char keysig[ECRYPTFS_SIG_SIZE_HEX + 1];};
struct ecryptfs_filename { struct list_head crypt_stat_list;#define ECRYPTFS_FILENAME_CONTAINS_DECRYPTED 0x00000001 u32 flags; u32 seq_no; char *filename; char *encrypted_filename; size_t filename_size; size_t encrypted_filename_size; char fnek_sig[ECRYPTFS_SIG_SIZE_HEX]; char dentry_name[ECRYPTFS_ENCRYPTED_DENTRY_NAME_LEN + 1];};
/** * This is the primary struct associated with each encrypted file. * * TODO: cache align/pack? */struct ecryptfs_crypt_stat {#define ECRYPTFS_STRUCT_INITIALIZED 0x00000001#define ECRYPTFS_POLICY_APPLIED 0x00000002#define ECRYPTFS_ENCRYPTED 0x00000004#define ECRYPTFS_SECURITY_WARNING 0x00000008#define ECRYPTFS_ENABLE_HMAC 0x00000010#define ECRYPTFS_ENCRYPT_IV_PAGES 0x00000020#define ECRYPTFS_KEY_VALID 0x00000040#define ECRYPTFS_METADATA_IN_XATTR 0x00000080#define ECRYPTFS_VIEW_AS_ENCRYPTED 0x00000100#define ECRYPTFS_KEY_SET 0x00000200#define ECRYPTFS_ENCRYPT_FILENAMES 0x00000400#define ECRYPTFS_ENCFN_USE_MOUNT_FNEK 0x00000800#define ECRYPTFS_ENCFN_USE_FEK 0x00001000#define ECRYPTFS_UNLINK_SIGS 0x00002000#define ECRYPTFS_I_SIZE_INITIALIZED 0x00004000 u32 flags; unsigned int file_version; size_t iv_bytes; size_t metadata_size; size_t extent_size; /* Data extent size; default is 4096 */ size_t key_size; size_t extent_shift; unsigned int extent_mask; struct ecryptfs_mount_crypt_stat *mount_crypt_stat; struct crypto_skcipher *tfm; unsigned char cipher[ECRYPTFS_MAX_CIPHER_NAME_SIZE + 1]; unsigned char key[ECRYPTFS_MAX_KEY_BYTES]; unsigned char root_iv[ECRYPTFS_MAX_IV_BYTES]; struct list_head keysig_list; struct mutex keysig_list_mutex; struct mutex cs_tfm_mutex; struct mutex cs_mutex;};
/* inode private data. */struct ecryptfs_inode_info { struct inode vfs_inode; struct inode *wii_inode; struct mutex lower_file_mutex; atomic_t lower_file_count; struct file *lower_file; struct ecryptfs_crypt_stat crypt_stat;};
/** * ecryptfs_global_auth_tok - A key used to encrypt all new files under the mountpoint * @flags: Status flags * @mount_crypt_stat_list: These auth_toks hang off the mount-wide * cryptographic context. Every time a new * inode comes into existence, eCryptfs copies * the auth_toks on that list to the set of * auth_toks on the inode's crypt_stat * @global_auth_tok_key: The key from the user's keyring for the sig * @global_auth_tok: The key contents * @sig: The key identifier * * ecryptfs_global_auth_tok structs refer to authentication token keys * in the user keyring that apply to newly created files. A list of * these objects hangs off of the mount_crypt_stat struct for any * given eCryptfs mount. This struct maintains a reference to both the * key contents and the key itself so that the key can be put on * unmount. */struct ecryptfs_global_auth_tok {#define ECRYPTFS_AUTH_TOK_INVALID 0x00000001#define ECRYPTFS_AUTH_TOK_FNEK 0x00000002 u32 flags; struct list_head mount_crypt_stat_list; struct key *global_auth_tok_key; unsigned char sig[ECRYPTFS_SIG_SIZE_HEX + 1];};
/** * ecryptfs_key_tfm - Persistent key tfm * @key_tfm: crypto API handle to the key * @key_size: Key size in bytes * @key_tfm_mutex: Mutex to ensure only one operation in eCryptfs is * using the persistent TFM at any point in time * @key_tfm_list: Handle to hang this off the module-wide TFM list * @cipher_name: String name for the cipher for this TFM * * Typically, eCryptfs will use the same ciphers repeatedly throughout * the course of its operations. In order to avoid unnecessarily * destroying and initializing the same cipher repeatedly, eCryptfs * keeps a list of crypto API contexts around to use when needed. */struct ecryptfs_key_tfm { struct crypto_skcipher *key_tfm; size_t key_size; struct mutex key_tfm_mutex; struct list_head key_tfm_list; unsigned char cipher_name[ECRYPTFS_MAX_CIPHER_NAME_SIZE + 1];};
extern struct mutex key_tfm_list_mutex;
/** * This struct is to enable a mount-wide passphrase/salt combo. This * is more or less a stopgap to provide similar functionality to other * crypto filesystems like EncFS or CFS until full policy support is * implemented in eCryptfs. */struct ecryptfs_mount_crypt_stat { /* Pointers to memory we do not own, do not free these */#define ECRYPTFS_PLAINTEXT_PASSTHROUGH_ENABLED 0x00000001#define ECRYPTFS_XATTR_METADATA_ENABLED 0x00000002#define ECRYPTFS_ENCRYPTED_VIEW_ENABLED 0x00000004#define ECRYPTFS_MOUNT_CRYPT_STAT_INITIALIZED 0x00000008#define ECRYPTFS_GLOBAL_ENCRYPT_FILENAMES 0x00000010#define ECRYPTFS_GLOBAL_ENCFN_USE_MOUNT_FNEK 0x00000020#define ECRYPTFS_GLOBAL_ENCFN_USE_FEK 0x00000040#define ECRYPTFS_GLOBAL_MOUNT_AUTH_TOK_ONLY 0x00000080 u32 flags; struct list_head global_auth_tok_list; struct mutex global_auth_tok_list_mutex; size_t global_default_cipher_key_size; size_t global_default_fn_cipher_key_bytes; unsigned char global_default_cipher_name[ECRYPTFS_MAX_CIPHER_NAME_SIZE + 1]; unsigned char global_default_fn_cipher_name[ ECRYPTFS_MAX_CIPHER_NAME_SIZE + 1]; char global_default_fnek_sig[ECRYPTFS_SIG_SIZE_HEX + 1];};
/* superblock private data. */struct ecryptfs_sb_info { struct super_block *wsi_sb; struct vfsmount *lower_mnt; struct ecryptfs_mount_crypt_stat mount_crypt_stat;};
/* file private data. */struct ecryptfs_file_info { struct file *wfi_file; struct ecryptfs_crypt_stat *crypt_stat;};
/* auth_tok <=> encrypted_session_key mappings */struct ecryptfs_auth_tok_list_item { unsigned char encrypted_session_key[ECRYPTFS_MAX_KEY_BYTES]; struct list_head list; struct ecryptfs_auth_tok auth_tok;};
struct ecryptfs_message { /* Can never be greater than ecryptfs_message_buf_len */ /* Used to find the parent msg_ctx */ /* Inherits from msg_ctx->index */ u32 index; u32 data_len; u8 data[] __counted_by(data_len);};
struct ecryptfs_msg_ctx {#define ECRYPTFS_MSG_CTX_STATE_FREE 0x01#define ECRYPTFS_MSG_CTX_STATE_PENDING 0x02#define ECRYPTFS_MSG_CTX_STATE_DONE 0x03#define ECRYPTFS_MSG_CTX_STATE_NO_REPLY 0x04 u8 state;#define ECRYPTFS_MSG_HELO 100#define ECRYPTFS_MSG_QUIT 101#define ECRYPTFS_MSG_REQUEST 102#define ECRYPTFS_MSG_RESPONSE 103 u8 type; u32 index; /* Counter converts to a sequence number. Each message sent * out for which we expect a response has an associated * sequence number. The response must have the same sequence * number as the counter for the msg_stc for the message to be * valid. */ u32 counter; size_t msg_size; struct ecryptfs_message *msg; struct task_struct *task; struct list_head node; struct list_head daemon_out_list; struct mutex mux;};
struct ecryptfs_daemon {#define ECRYPTFS_DAEMON_IN_READ 0x00000001#define ECRYPTFS_DAEMON_IN_POLL 0x00000002#define ECRYPTFS_DAEMON_ZOMBIE 0x00000004#define ECRYPTFS_DAEMON_MISCDEV_OPEN 0x00000008 u32 flags; u32 num_queued_msg_ctx; struct file *file; struct mutex mux; struct list_head msg_ctx_out_queue; wait_queue_head_t wait; struct hlist_node euid_chain;};
#ifdef CONFIG_ECRYPT_FS_MESSAGINGextern struct mutex ecryptfs_daemon_hash_mux;#endif
static inline size_tecryptfs_lower_header_size(struct ecryptfs_crypt_stat *crypt_stat){ if (crypt_stat->flags & ECRYPTFS_METADATA_IN_XATTR) return 0; return crypt_stat->metadata_size;}
static inline struct ecryptfs_file_info *ecryptfs_file_to_private(struct file *file){ return file->private_data;}
static inline voidecryptfs_set_file_private(struct file *file, struct ecryptfs_file_info *file_info){ file->private_data = file_info;}
static inline struct file *ecryptfs_file_to_lower(struct file *file){ return ((struct ecryptfs_file_info *)file->private_data)->wfi_file;}
static inline voidecryptfs_set_file_lower(struct file *file, struct file *lower_file){ ((struct ecryptfs_file_info *)file->private_data)->wfi_file = lower_file;}
static inline struct ecryptfs_inode_info *ecryptfs_inode_to_private(struct inode *inode){ return container_of(inode, struct ecryptfs_inode_info, vfs_inode);}
static inline struct inode *ecryptfs_inode_to_lower(struct inode *inode){ return ecryptfs_inode_to_private(inode)->wii_inode;}
static inline voidecryptfs_set_inode_lower(struct inode *inode, struct inode *lower_inode){ ecryptfs_inode_to_private(inode)->wii_inode = lower_inode;}
static inline struct ecryptfs_sb_info *ecryptfs_superblock_to_private(struct super_block *sb){ return (struct ecryptfs_sb_info *)sb->s_fs_info;}
static inline voidecryptfs_set_superblock_private(struct super_block *sb, struct ecryptfs_sb_info *sb_info){ sb->s_fs_info = sb_info;}
static inline struct super_block *ecryptfs_superblock_to_lower(struct super_block *sb){ return ((struct ecryptfs_sb_info *)sb->s_fs_info)->wsi_sb;}
static inline voidecryptfs_set_superblock_lower(struct super_block *sb, struct super_block *lower_sb){ ((struct ecryptfs_sb_info *)sb->s_fs_info)->wsi_sb = lower_sb;}
static inline voidecryptfs_set_dentry_lower(struct dentry *dentry, struct dentry *lower_dentry){ dentry->d_fsdata = lower_dentry;}
static inline struct dentry *ecryptfs_dentry_to_lower(struct dentry *dentry){ return dentry->d_fsdata;}
static inline struct pathecryptfs_lower_path(struct dentry *dentry){ return (struct path){ .mnt = ecryptfs_superblock_to_private(dentry->d_sb)->lower_mnt, .dentry = ecryptfs_dentry_to_lower(dentry) };}
#define ecryptfs_printk(type, fmt, arg...) \ __ecryptfs_printk(type "%s: " fmt, __func__, ## arg)__printf(1, 2)void __ecryptfs_printk(const char *fmt, ...);
extern const struct file_operations ecryptfs_main_fops;extern const struct file_operations ecryptfs_dir_fops;extern const struct inode_operations ecryptfs_main_iops;extern const struct inode_operations ecryptfs_dir_iops;extern const struct inode_operations ecryptfs_symlink_iops;extern const struct super_operations ecryptfs_sops;extern const struct dentry_operations ecryptfs_dops;extern const struct address_space_operations ecryptfs_aops;extern int ecryptfs_verbosity;extern unsigned int ecryptfs_message_buf_len;extern signed long ecryptfs_message_wait_timeout;extern unsigned int ecryptfs_number_of_users;
extern struct kmem_cache *ecryptfs_auth_tok_list_item_cache;extern struct kmem_cache *ecryptfs_file_info_cache;extern struct kmem_cache *ecryptfs_inode_info_cache;extern struct kmem_cache *ecryptfs_sb_info_cache;extern struct kmem_cache *ecryptfs_header_cache;extern struct kmem_cache *ecryptfs_xattr_cache;extern struct kmem_cache *ecryptfs_key_record_cache;extern struct kmem_cache *ecryptfs_key_sig_cache;extern struct kmem_cache *ecryptfs_global_auth_tok_cache;extern struct kmem_cache *ecryptfs_key_tfm_cache;
struct inode *ecryptfs_get_inode(struct inode *lower_inode, struct super_block *sb);void ecryptfs_i_size_init(const char *page_virt, struct inode *inode);int ecryptfs_initialize_file(struct dentry *ecryptfs_dentry, struct inode *ecryptfs_inode);int ecryptfs_decode_and_decrypt_filename(char **decrypted_name, size_t *decrypted_name_size, struct super_block *sb, const char *name, size_t name_size);int ecryptfs_encrypt_and_encode_filename( char **encoded_name, size_t *encoded_name_size, struct ecryptfs_mount_crypt_stat *mount_crypt_stat, const char *name, size_t name_size);void ecryptfs_dump_hex(char *data, int bytes);int virt_to_scatterlist(const void *addr, int size, struct scatterlist *sg, int sg_size);int ecryptfs_compute_root_iv(struct ecryptfs_crypt_stat *crypt_stat);void ecryptfs_rotate_iv(unsigned char *iv);void ecryptfs_init_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat);void ecryptfs_destroy_crypt_stat(struct ecryptfs_crypt_stat *crypt_stat);void ecryptfs_destroy_mount_crypt_stat( struct ecryptfs_mount_crypt_stat *mount_crypt_stat);int ecryptfs_init_crypt_ctx(struct ecryptfs_crypt_stat *crypt_stat);int ecryptfs_write_inode_size_to_metadata(struct inode *ecryptfs_inode);int ecryptfs_encrypt_page(struct folio *folio);int ecryptfs_decrypt_page(struct folio *folio);int ecryptfs_write_metadata(struct dentry *ecryptfs_dentry, struct inode *ecryptfs_inode);int ecryptfs_read_metadata(struct dentry *ecryptfs_dentry);int ecryptfs_new_file_context(struct inode *ecryptfs_inode);void ecryptfs_write_crypt_stat_flags(char *page_virt, struct ecryptfs_crypt_stat *crypt_stat, size_t *written);int ecryptfs_read_and_validate_header_region(struct inode *inode);int ecryptfs_read_and_validate_xattr_region(struct dentry *dentry, struct inode *inode);u8 ecryptfs_code_for_cipher_string(char *cipher_name, size_t key_bytes);int ecryptfs_cipher_code_to_string(char *str, size_t size, u8 cipher_code);void ecryptfs_set_default_sizes(struct ecryptfs_crypt_stat *crypt_stat);int ecryptfs_generate_key_packet_set(char *dest_base, struct ecryptfs_crypt_stat *crypt_stat, struct dentry *ecryptfs_dentry, size_t *len, size_t max);intecryptfs_parse_packet_set(struct ecryptfs_crypt_stat *crypt_stat, unsigned char *src, struct dentry *ecryptfs_dentry);int ecryptfs_truncate(struct dentry *dentry, loff_t new_length);ssize_tecryptfs_getxattr_lower(struct dentry *lower_dentry, struct inode *lower_inode, const char *name, void *value, size_t size);intecryptfs_setxattr(struct dentry *dentry, struct inode *inode, const char *name, const void *value, size_t size, int flags);int ecryptfs_read_xattr_region(char *page_virt, struct inode *ecryptfs_inode);#ifdef CONFIG_ECRYPT_FS_MESSAGINGint ecryptfs_process_response(struct ecryptfs_daemon *daemon, struct ecryptfs_message *msg, u32 seq);int ecryptfs_send_message(char *data, int data_len, struct ecryptfs_msg_ctx **msg_ctx);int ecryptfs_wait_for_response(struct ecryptfs_msg_ctx *msg_ctx, struct ecryptfs_message **emsg);int ecryptfs_init_messaging(void);void ecryptfs_release_messaging(void);#elsestatic inline int ecryptfs_init_messaging(void){ return 0;}static inline void ecryptfs_release_messaging(void){ }static inline int ecryptfs_send_message(char *data, int data_len, struct ecryptfs_msg_ctx **msg_ctx){ return -ENOTCONN;}static inline int ecryptfs_wait_for_response(struct ecryptfs_msg_ctx *msg_ctx, struct ecryptfs_message **emsg){ return -ENOMSG;}#endif
voidecryptfs_write_header_metadata(char *virt, struct ecryptfs_crypt_stat *crypt_stat, size_t *written);int ecryptfs_add_keysig(struct ecryptfs_crypt_stat *crypt_stat, char *sig);intecryptfs_add_global_auth_tok(struct ecryptfs_mount_crypt_stat *mount_crypt_stat, char *sig, u32 global_auth_tok_flags);int ecryptfs_get_global_auth_tok_for_sig( struct ecryptfs_global_auth_tok **global_auth_tok, struct ecryptfs_mount_crypt_stat *mount_crypt_stat, char *sig);intecryptfs_add_new_key_tfm(struct ecryptfs_key_tfm **key_tfm, char *cipher_name, size_t key_size);int ecryptfs_init_crypto(void);int ecryptfs_destroy_crypto(void);int ecryptfs_tfm_exists(char *cipher_name, struct ecryptfs_key_tfm **key_tfm);int ecryptfs_get_tfm_and_mutex_for_cipher_name(struct crypto_skcipher **tfm, struct mutex **tfm_mutex, char *cipher_name);int ecryptfs_keyring_auth_tok_for_sig(struct key **auth_tok_key, struct ecryptfs_auth_tok **auth_tok, char *sig);int ecryptfs_write_lower(struct inode *ecryptfs_inode, char *data, loff_t offset, size_t size);int ecryptfs_write_lower_page_segment(struct inode *ecryptfs_inode, struct folio *folio_for_lower, size_t offset_in_page, size_t size);int ecryptfs_write(struct inode *inode, char *data, loff_t offset, size_t size);int ecryptfs_read_lower(char *data, loff_t offset, size_t size, struct inode *ecryptfs_inode);int ecryptfs_read_lower_page_segment(struct folio *folio_for_ecryptfs, pgoff_t page_index, size_t offset_in_page, size_t size, struct inode *ecryptfs_inode);int ecryptfs_parse_packet_length(unsigned char *data, size_t *size, size_t *length_size);int ecryptfs_write_packet_length(char *dest, size_t size, size_t *packet_size_length);#ifdef CONFIG_ECRYPT_FS_MESSAGINGint ecryptfs_init_ecryptfs_miscdev(void);void ecryptfs_destroy_ecryptfs_miscdev(void);int ecryptfs_send_miscdev(char *data, size_t data_size, struct ecryptfs_msg_ctx *msg_ctx, u8 msg_type, u16 msg_flags, struct ecryptfs_daemon *daemon);void ecryptfs_msg_ctx_alloc_to_free(struct ecryptfs_msg_ctx *msg_ctx);intecryptfs_spawn_daemon(struct ecryptfs_daemon **daemon, struct file *file);int ecryptfs_exorcise_daemon(struct ecryptfs_daemon *daemon);int ecryptfs_find_daemon_by_euid(struct ecryptfs_daemon **daemon);#endifint ecryptfs_init_kthread(void);void ecryptfs_destroy_kthread(void);int ecryptfs_privileged_open(struct file **lower_file, struct dentry *lower_dentry, struct vfsmount *lower_mnt, const struct cred *cred);int ecryptfs_get_lower_file(struct dentry *dentry, struct inode *inode);void ecryptfs_put_lower_file(struct inode *inode);intecryptfs_write_tag_70_packet(char *dest, size_t *remaining_bytes, size_t *packet_size, struct ecryptfs_mount_crypt_stat *mount_crypt_stat, char *filename, size_t filename_size);intecryptfs_parse_tag_70_packet(char **filename, size_t *filename_size, size_t *packet_size, struct ecryptfs_mount_crypt_stat *mount_crypt_stat, char *data, size_t max_packet_size);int ecryptfs_set_f_namelen(long *namelen, long lower_namelen, struct ecryptfs_mount_crypt_stat *mount_crypt_stat);void ecryptfs_derive_iv(char *iv, struct ecryptfs_crypt_stat *crypt_stat, loff_t offset);
extern const struct xattr_handler * const ecryptfs_xattr_handlers[];
#endif /* #ifndef ECRYPTFS_KERNEL_H */