X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=fs%2Fecryptfs%2Fecryptfs_kernel.h;h=951ee33a022df4adfb0427c737208f285a7225ac;hb=d3c5f8b93febadf62da9a4b39a2dca8e66a4da40;hp=e6a68a87b5dfca6a1c6956afbebbf5956e9ea3ee;hpb=da0102a10aed2244d8fc34f289e81e502622b81e;p=linux-2.6 diff --git a/fs/ecryptfs/ecryptfs_kernel.h b/fs/ecryptfs/ecryptfs_kernel.h index e6a68a87b5..951ee33a02 100644 --- a/fs/ecryptfs/ecryptfs_kernel.h +++ b/fs/ecryptfs/ecryptfs_kernel.h @@ -4,7 +4,7 @@ * * Copyright (C) 1997-2003 Erez Zadok * Copyright (C) 2001-2003 Stony Brook University - * Copyright (C) 2004-2007 International Business Machines Corp. + * Copyright (C) 2004-2008 International Business Machines Corp. * Author(s): Michael A. Halcrow * Trevor S. Highland * Tyler Hicks @@ -34,6 +34,7 @@ #include #include #include +#include /* Version verification for shared data structures w/ userspace */ #define ECRYPTFS_VERSION_MAJOR 0x00 @@ -49,11 +50,13 @@ #define ECRYPTFS_VERSIONING_POLICY 0x00000008 #define ECRYPTFS_VERSIONING_XATTR 0x00000010 #define ECRYPTFS_VERSIONING_MULTKEY 0x00000020 +#define ECRYPTFS_VERSIONING_DEVMISC 0x00000040 #define ECRYPTFS_VERSIONING_MASK (ECRYPTFS_VERSIONING_PASSPHRASE \ | ECRYPTFS_VERSIONING_PLAINTEXT_PASSTHROUGH \ | ECRYPTFS_VERSIONING_PUBKEY \ | ECRYPTFS_VERSIONING_XATTR \ - | ECRYPTFS_VERSIONING_MULTKEY) + | ECRYPTFS_VERSIONING_MULTKEY \ + | ECRYPTFS_VERSIONING_DEVMISC) #define ECRYPTFS_MAX_PASSWORD_LENGTH 64 #define ECRYPTFS_MAX_PASSPHRASE_BYTES ECRYPTFS_MAX_PASSWORD_LENGTH #define ECRYPTFS_SALT_SIZE 8 @@ -73,17 +76,14 @@ #define ECRYPTFS_DEFAULT_MSG_CTX_ELEMS 32 #define ECRYPTFS_DEFAULT_SEND_TIMEOUT HZ #define ECRYPTFS_MAX_MSG_CTX_TTL (HZ*3) -#define ECRYPTFS_NLMSG_HELO 100 -#define ECRYPTFS_NLMSG_QUIT 101 -#define ECRYPTFS_NLMSG_REQUEST 102 -#define ECRYPTFS_NLMSG_RESPONSE 103 #define ECRYPTFS_MAX_PKI_NAME_BYTES 16 #define ECRYPTFS_DEFAULT_NUM_USERS 4 #define ECRYPTFS_MAX_NUM_USERS 32768 #define ECRYPTFS_TRANSPORT_NETLINK 0 #define ECRYPTFS_TRANSPORT_CONNECTOR 1 #define ECRYPTFS_TRANSPORT_RELAYFS 2 -#define ECRYPTFS_DEFAULT_TRANSPORT ECRYPTFS_TRANSPORT_NETLINK +#define ECRYPTFS_TRANSPORT_MISCDEV 3 +#define ECRYPTFS_DEFAULT_TRANSPORT ECRYPTFS_TRANSPORT_MISCDEV #define ECRYPTFS_XATTR_NAME "user.ecryptfs" #define RFC2440_CIPHER_DES3_EDE 0x02 @@ -234,10 +234,11 @@ struct ecryptfs_crypt_stat { #define ECRYPTFS_KEY_VALID 0x00000080 #define ECRYPTFS_METADATA_IN_XATTR 0x00000100 #define ECRYPTFS_VIEW_AS_ENCRYPTED 0x00000200 +#define ECRYPTFS_KEY_SET 0x00000400 u32 flags; unsigned int file_version; size_t iv_bytes; - size_t num_header_extents_at_front; + size_t num_header_bytes_at_front; size_t extent_size; /* Data extent size; default is 4096 */ size_t key_size; size_t extent_shift; @@ -322,7 +323,6 @@ struct ecryptfs_key_tfm { unsigned char cipher_name[ECRYPTFS_MAX_CIPHER_NAME_SIZE + 1]; }; -extern struct list_head key_tfm_list; extern struct mutex key_tfm_list_mutex; /** @@ -366,32 +366,63 @@ struct ecryptfs_auth_tok_list_item { }; 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[]; }; struct ecryptfs_msg_ctx { -#define ECRYPTFS_MSG_CTX_STATE_FREE 0x0001 -#define ECRYPTFS_MSG_CTX_STATE_PENDING 0x0002 -#define ECRYPTFS_MSG_CTX_STATE_DONE 0x0003 - u32 state; - unsigned int index; - unsigned int counter; +#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; }; extern unsigned int ecryptfs_transport; -struct ecryptfs_daemon_id { - pid_t pid; - uid_t uid; - struct hlist_node id_chain; +struct ecryptfs_daemon; + +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 pid *pid; + uid_t euid; + struct user_namespace *user_ns; + struct task_struct *task; + struct mutex mux; + struct list_head msg_ctx_out_queue; + wait_queue_head_t wait; + struct hlist_node euid_chain; }; +extern struct mutex ecryptfs_daemon_hash_mux; + static inline struct ecryptfs_file_info * ecryptfs_file_to_private(struct file *file) { @@ -500,7 +531,7 @@ ecryptfs_set_dentry_lower_mnt(struct dentry *dentry, struct vfsmount *lower_mnt) } #define ecryptfs_printk(type, fmt, arg...) \ - __ecryptfs_printk(type "%s: " fmt, __FUNCTION__, ## arg); + __ecryptfs_printk(type "%s: " fmt, __func__, ## arg); void __ecryptfs_printk(const char *fmt, ...); extern const struct file_operations ecryptfs_main_fops; @@ -521,11 +552,9 @@ extern struct kmem_cache *ecryptfs_file_info_cache; extern struct kmem_cache *ecryptfs_dentry_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_0; extern struct kmem_cache *ecryptfs_header_cache_1; extern struct kmem_cache *ecryptfs_header_cache_2; extern struct kmem_cache *ecryptfs_xattr_cache; -extern struct kmem_cache *ecryptfs_lower_page_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; @@ -552,41 +581,18 @@ 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); -#define ECRYPTFS_LOWER_I_MUTEX_NOT_HELD 0 -#define ECRYPTFS_LOWER_I_MUTEX_HELD 1 -int ecryptfs_write_inode_size_to_metadata(struct file *lower_file, - struct inode *lower_inode, - struct inode *inode, - struct dentry *ecryptfs_dentry, - int lower_i_mutex_held); -int ecryptfs_get_lower_page(struct page **lower_page, struct inode *lower_inode, - struct file *lower_file, - unsigned long lower_page_index, int byte_offset, - int region_bytes); -int -ecryptfs_commit_lower_page(struct page *lower_page, struct inode *lower_inode, - struct file *lower_file, int byte_offset, - int region_size); -int ecryptfs_copy_page_to_lower(struct page *page, struct inode *lower_inode, - struct file *lower_file); -int ecryptfs_do_readpage(struct file *file, struct page *page, - pgoff_t lower_page_index); -int ecryptfs_writepage_and_release_lower_page(struct page *lower_page, - struct inode *lower_inode, - struct writeback_control *wbc); -int ecryptfs_encrypt_page(struct ecryptfs_page_crypt_context *ctx); -int ecryptfs_decrypt_page(struct file *file, struct page *page); -int ecryptfs_write_metadata(struct dentry *ecryptfs_dentry, - struct file *lower_file); -int ecryptfs_read_metadata(struct dentry *ecryptfs_dentry, - struct file *lower_file); +int ecryptfs_write_inode_size_to_metadata(struct inode *ecryptfs_inode); +int ecryptfs_encrypt_page(struct page *page); +int ecryptfs_decrypt_page(struct page *page); +int ecryptfs_write_metadata(struct dentry *ecryptfs_dentry); +int ecryptfs_read_metadata(struct dentry *ecryptfs_dentry); int ecryptfs_new_file_context(struct dentry *ecryptfs_dentry); -int ecryptfs_read_and_validate_header_region(char *data, struct dentry *dentry, - struct vfsmount *mnt); +int ecryptfs_read_and_validate_header_region(char *data, + struct inode *ecryptfs_inode); int ecryptfs_read_and_validate_xattr_region(char *page_virt, struct dentry *ecryptfs_dentry); -u16 ecryptfs_code_for_cipher_string(struct ecryptfs_crypt_stat *crypt_stat); -int ecryptfs_cipher_code_to_string(char *str, u16 cipher_code); +u8 ecryptfs_code_for_cipher_string(struct ecryptfs_crypt_stat *crypt_stat); +int ecryptfs_cipher_code_to_string(char *str, 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, @@ -599,20 +605,20 @@ int ecryptfs_truncate(struct dentry *dentry, loff_t new_length); int ecryptfs_inode_test(struct inode *inode, void *candidate_lower_inode); int ecryptfs_inode_set(struct inode *inode, void *lower_inode); void ecryptfs_init_inode(struct inode *inode, struct inode *lower_inode); -int ecryptfs_open_lower_file(struct file **lower_file, - struct dentry *lower_dentry, - struct vfsmount *lower_mnt, int flags); -int ecryptfs_close_lower_file(struct file *lower_file); -ssize_t ecryptfs_getxattr(struct dentry *dentry, const char *name, void *value, - size_t size); +ssize_t +ecryptfs_getxattr_lower(struct dentry *lower_dentry, const char *name, + void *value, size_t size); int ecryptfs_setxattr(struct dentry *dentry, const char *name, const void *value, size_t size, int flags); -int ecryptfs_read_xattr_region(char *page_virt, struct dentry *ecryptfs_dentry); -int ecryptfs_process_helo(unsigned int transport, uid_t uid, pid_t pid); -int ecryptfs_process_quit(uid_t uid, pid_t pid); -int ecryptfs_process_response(struct ecryptfs_message *msg, uid_t uid, - pid_t pid, u32 seq); +int ecryptfs_read_xattr_region(char *page_virt, struct inode *ecryptfs_inode); +int ecryptfs_process_helo(unsigned int transport, uid_t euid, + struct user_namespace *user_ns, struct pid *pid); +int ecryptfs_process_quit(uid_t euid, struct user_namespace *user_ns, + struct pid *pid); +int ecryptfs_process_response(struct ecryptfs_message *msg, uid_t euid, + struct user_namespace *user_ns, struct pid *pid, + u32 seq); int ecryptfs_send_message(unsigned int transport, char *data, int data_len, struct ecryptfs_msg_ctx **msg_ctx); int ecryptfs_wait_for_response(struct ecryptfs_msg_ctx *msg_ctx, @@ -621,14 +627,14 @@ int ecryptfs_init_messaging(unsigned int transport); void ecryptfs_release_messaging(unsigned int transport); int ecryptfs_send_netlink(char *data, int data_len, - struct ecryptfs_msg_ctx *msg_ctx, u16 msg_type, - u16 msg_flags, pid_t daemon_pid); + struct ecryptfs_msg_ctx *msg_ctx, u8 msg_type, + u16 msg_flags, struct pid *daemon_pid); int ecryptfs_init_netlink(void); void ecryptfs_release_netlink(void); int ecryptfs_send_connector(char *data, int data_len, - struct ecryptfs_msg_ctx *msg_ctx, u16 msg_type, - u16 msg_flags, pid_t daemon_pid); + struct ecryptfs_msg_ctx *msg_ctx, u8 msg_type, + u16 msg_flags, struct pid *daemon_pid); int ecryptfs_init_connector(void); void ecryptfs_release_connector(void); void @@ -647,6 +653,7 @@ ecryptfs_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_blkcipher **tfm, struct mutex **tfm_mutex, char *cipher_name); @@ -668,8 +675,22 @@ int ecryptfs_read_lower_page_segment(struct page *page_for_ecryptfs, pgoff_t page_index, size_t offset_in_page, size_t size, struct inode *ecryptfs_inode); -int ecryptfs_read(char *data, loff_t offset, size_t size, - struct file *ecryptfs_file); -struct page *ecryptfs_get1page(struct file *file, loff_t index); +struct page *ecryptfs_get_locked_page(struct file *file, loff_t index); +int ecryptfs_exorcise_daemon(struct ecryptfs_daemon *daemon); +int ecryptfs_find_daemon_by_euid(struct ecryptfs_daemon **daemon, uid_t euid, + struct user_namespace *user_ns); +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); +int 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); +int +ecryptfs_spawn_daemon(struct ecryptfs_daemon **daemon, uid_t euid, + struct user_namespace *user_ns, struct pid *pid); #endif /* #ifndef ECRYPTFS_KERNEL_H */