#include <stdint.h>
#include <stddef.h>
-#include "ext4_config.h"
-#include "ext4_errno.h"
-#include "ext4_oflags.h"
-#include "ext4_types.h"
-#include "ext4_blockdev.h"
+#include <ext4_config.h>
+#include <ext4_types.h>
+#include <ext4_errno.h>
+#include <ext4_oflags.h>
+#include <ext4_debug.h>
+
+#include <ext4_blockdev.h>
/********************************OS LOCK INFERFACE***************************/
/**@brief OS dependent lock interface.*/
struct ext4_lock {
- /**@brief Lock access to mount point*/
+ /**@brief Lock access to mount point.*/
void (*lock)(void);
- /**@brief Unlock access to mount point*/
+ /**@brief Unlock access to mount point.*/
void (*unlock)(void);
};
/********************************FILE DESCRIPTOR*****************************/
-/**@brief File descriptor*/
+/**@brief File descriptor. */
typedef struct ext4_file {
/**@brief Mount point handle.*/
struct ext4_mountpoint *mp;
- /**@brief File inode id*/
+ /**@brief File inode id.*/
uint32_t inode;
/**@brief Open flags.*/
/**@brief File size.*/
uint64_t fsize;
- /**@brief File position*/
+ /**@brief Actual file position.*/
uint64_t fpos;
} ext4_file;
/*****************************DIRECTORY DESCRIPTOR***************************/
-/**@brief Directory entry descriptor. Copy from ext4_types.h*/
+/**@brief Directory entry descriptor. */
typedef struct ext4_direntry {
uint32_t inode;
uint16_t entry_length;
uint8_t name[255];
} ext4_direntry;
+/**@brief Directory descriptor. */
typedef struct ext4_dir {
- /**@brief File descriptor*/
+ /**@brief File descriptor.*/
ext4_file f;
/**@brief Current directory entry.*/
ext4_direntry de;
- /**@brief Next entry offset*/
+ /**@brief Next entry offset.*/
uint64_t next_off;
} ext4_dir;
/********************************MOUNT OPERATIONS****************************/
-/**@brief Register a block device to a name.
- * @warning Block device has to be filled by
- * Block cache may by created automatically when bc parameter is NULL.
- * @param bd block device
- * @param bd block device cache
- * @param dev_name register name
- * @param standard error code*/
-int ext4_device_register(struct ext4_blockdev *bd, struct ext4_bcache *bc,
+/**@brief Register block device.
+ *
+ * @param bd Block device.
+ * @param dev_name Block device name.
+ *
+ * @return Standard error code.*/
+int ext4_device_register(struct ext4_blockdev *bd,
const char *dev_name);
+/**@brief Un-register block device.
+ *
+ * @param dev_name Block device name.
+ *
+ * @return Standard error code.*/
+int ext4_device_unregister(const char *dev_name);
+
+/**@brief Un-register all block devices.
+ *
+ * @return Standard error code.*/
+int ext4_device_unregister_all(void);
+
/**@brief Mount a block device with EXT4 partition to the mount point.
- * @param dev_name block device name (@ref ext4_device_register)
- * @param mount_point mount point, for example
+ *
+ * @param dev_name Block device name (@ref ext4_device_register).
+ * @param mount_point Mount point, for example:
* - /
* - /my_partition/
* - /my_second_partition/
* @param read_only mount as read-only mode.
*
- * @return standard error code */
+ * @return Standard error code */
int ext4_mount(const char *dev_name,
const char *mount_point,
bool read_only);
/**@brief Umount operation.
- * @param mount_point mount name
- * @return standard error code */
+ *
+ * @param mount_pount Mount point.
+ *
+ * @return Standard error code */
int ext4_umount(const char *mount_point);
-/**@brief Start journaling. Journaling start/stop functions are transparent
+/**@brief Starts journaling. Journaling start/stop functions are transparent
* and might be used on filesystems without journaling support.
* @warning Usage:
* ext4_mount("sda1", "/");
*
* ext4_journal_stop("/");
* ext4_umount("/");
- * @param mount_point mount name
- * @return standard error code */
+ * @param mount_pount Mount point.
+ *
+ * @return Standard error code. */
int ext4_journal_start(const char *mount_point);
-/**@brief Stop journaling. Journaling start/stop functions are transparent
+/**@brief Stops journaling. Journaling start/stop functions are transparent
* and might be used on filesystems without journaling support.
- * @param mount_point mount name
- * @return standard error code */
+ *
+ * @param mount_pount Mount point name.
+ *
+ * @return Standard error code. */
int ext4_journal_stop(const char *mount_point);
/**@brief Journal recovery.
- * @param mount_point mount point
- * @warning Must be called after @ref ext4_mount
- * @return standard error code */
+ * @warning Must be called after @ref ext4_mount.
+ *
+ * @param mount_pount Mount point.
+ *
+ * @return Standard error code. */
int ext4_recover(const char *mount_point);
-/**@brief Some of the filesystem stats.*/
+/**@brief Some of the filesystem stats. */
struct ext4_mount_stats {
uint32_t inodes_count;
uint32_t free_inodes_count;
char volume_name[16];
};
-/**@brief Get file system params.
- * @param mount_point mount path
- * @param stats ext fs stats
- * @return standard error code */
+/**@brief Get file mount point stats.
+ *
+ * @param mount_pount Mount point.
+ * @param stats Filesystem stats.
+ *
+ * @return Standard error code. */
int ext4_mount_point_stats(const char *mount_point,
struct ext4_mount_stats *stats);
/**@brief Setup OS lock routines.
- * @param mount_point mount path
- * @param locks - lock and unlock functions
- * @return standard error code */
+ *
+ * @param mount_pount Mount point.
+ * @param locks Lock and unlock functions
+ *
+ * @return Standard error code. */
int ext4_mount_setup_locks(const char *mount_point,
const struct ext4_lock *locks);
/**@brief Acquire the filesystem superblock pointer of a mp.
- * @param mount_point mount path
- * @param superblock pointer
- * @return standard error code */
+ *
+ * @param mount_pount Mount point.
+ * @param sb Superblock handle
+ *
+ * @return Standard error code. */
int ext4_get_sblock(const char *mount_point, struct ext4_sblock **sb);
/**@brief Enable/disable write back cache mode.
* @warning Default model of cache is write trough. It means that when You do:
*
* ext4_fopen(...);
- * ext4_fwrie(...);
+ * ext4_fwrite(...);
* < --- data is flushed to physical drive
*
* When you do:
* ext4_cache_write_back(..., 1);
* ext4_fopen(...);
- * ext4_fwrie(...);
+ * ext4_fwrite(...);
* < --- data is NOT flushed to physical drive
* ext4_cache_write_back(..., 0);
* < --- when write back mode is disabled all
* Write back mode is useful when you want to create a lot of empty
* files/directories.
*
- * @param path mount point path
- * @param on enable/disable
+ * @param mount_pount Mount point.
+ * @param on Enable/disable cache writeback mode.
*
- * @return standard error code */
+ * @return Standard error code. */
int ext4_cache_write_back(const char *path, bool on);
+
+/**@brief Force cache flush.
+ *
+ * @param mount_pount Mount point.
+ *
+ * @return Standard error code. */
+int ext4_cache_flush(const char *path);
+
/********************************FILE OPERATIONS*****************************/
/**@brief Remove file by path.
- * @param path path to file
- * @return standard error code */
+ *
+ * @param path Path to file.
+ *
+ * @return Standard error code. */
int ext4_fremove(const char *path);
-/**@brief create a hardlink for a file.
- * @param path path to file
- * @param hardlink_path path of hardlink
- * @return standard error code */
+/**@brief Create a hardlink for a file.
+ *
+ * @param path Path to file.
+ * @param hardlink_path Path of hardlink.
+ *
+ * @return Standard error code. */
int ext4_flink(const char *path, const char *hardlink_path);
-/**@brief Rename file
- * @param path source
- * @param new_path destination
- * @return standard error code */
+/**@brief Rename file.
+ * @param path Source.
+ * @param new_path Destination.
+ * @return Standard error code. */
int ext4_frename(const char *path, const char *new_path);
/**@brief File open function.
- * @param path filename (has to start from mount point)
- * /my_partition/my_file
- * @param flags open file flags
+ *
+ * @param file File handle.
+ * @param path File path, has to start from mount point:/my_partition/file.
+ * @param flags File open flags.
* |---------------------------------------------------------------|
* | r or rb O_RDONLY |
* |---------------------------------------------------------------|
* | a+ or ab+ or a+b O_RDWR|O_CREAT|O_APPEND |
* |---------------------------------------------------------------|
*
- * @return standard error code*/
-int ext4_fopen(ext4_file *f, const char *path, const char *flags);
+ * @return Standard error code.*/
+int ext4_fopen(ext4_file *file, const char *path, const char *flags);
/**@brief Alternate file open function.
- * @param filename, (has to start from mount point)
- * /my_partition/my_file
- * @param flags open file flags
- * @return standard error code*/
-int ext4_fopen2(ext4_file *f, const char *path, int flags);
+ *
+ * @param file File handle.
+ * @param path File path, has to start from mount point:/my_partition/file.
+ * @param flags File open flags.
+ *
+ * @return Standard error code.*/
+int ext4_fopen2(ext4_file *file, const char *path, int flags);
/**@brief File close function.
- * @param f file handle
- * @return standard error code*/
-int ext4_fclose(ext4_file *f);
+ *
+ * @param file File handle.
+ *
+ * @return Standard error code.*/
+int ext4_fclose(ext4_file *file);
-/**@brief Fill in the ext4_inode buffer.
- * @param path fetch inode data of the path
- * @param ret_ino the inode id of the path
- * @param ext4_inode buffer
- * @return standard error code*/
-int ext4_fill_raw_inode(const char *path, uint32_t *ret_ino,
- struct ext4_inode *inode);
/**@brief File truncate function.
- * @param f file handle
- * @param new file size
- * @return standard error code*/
-int ext4_ftruncate(ext4_file *f, uint64_t size);
+ *
+ * @param file File handle.
+ * @param size New file size.
+ *
+ * @return Standard error code.*/
+int ext4_ftruncate(ext4_file *file, uint64_t size);
/**@brief Read data from file.
- * @param f file handle
- * @param buf output buffer
- * @param size bytes to read
- * @param rcnt bytes read (may be NULL)
- * @return standard error code*/
-int ext4_fread(ext4_file *f, void *buf, size_t size, size_t *rcnt);
+ *
+ * @param file File handle.
+ * @param buf Output buffer.
+ * @param size Bytes to read.
+ * @param rcnt Bytes read (NULL allowed).
+ *
+ * @return Standard error code.*/
+int ext4_fread(ext4_file *file, void *buf, size_t size, size_t *rcnt);
/**@brief Write data to file.
- * @param f file handle
- * @param buf data to write
- * @param size write length
- * @param wcnt bytes written (may be NULL)
- * @return standard error code*/
-int ext4_fwrite(ext4_file *f, const void *buf, size_t size, size_t *wcnt);
+ *
+ * @param file File handle.
+ * @param buf Data to write
+ * @param size Write length..
+ * @param wcnt Bytes written (NULL allowed).
+ *
+ * @return Standard error code.*/
+int ext4_fwrite(ext4_file *file, const void *buf, size_t size, size_t *wcnt);
/**@brief File seek operation.
- * @param f file handle
- * @param offset offset to seek
- * @param origin seek type:
+ *
+ * @param file File handle.
+ * @param offset Offset to seek.
+ * @param origin Seek type:
* @ref SEEK_SET
* @ref SEEK_CUR
* @ref SEEK_END
- * @return standard error code*/
-int ext4_fseek(ext4_file *f, uint64_t offset, uint32_t origin);
+ *
+ * @return Standard error code.*/
+int ext4_fseek(ext4_file *file, uint64_t offset, uint32_t origin);
/**@brief Get file position.
- * @param f file handle
- * @return actual file position */
-uint64_t ext4_ftell(ext4_file *f);
+ *
+ * @param file File handle.
+ *
+ * @return Actual file position */
+uint64_t ext4_ftell(ext4_file *file);
/**@brief Get file size.
- * @param f file handle
- * @return file size */
-uint64_t ext4_fsize(ext4_file *f);
+ *
+ * @param file File handle.
+ *
+ * @return File size. */
+uint64_t ext4_fsize(ext4_file *file);
-/**@brief Change file/directory/link mode bits
- * @param path to file/dir/link
- * @param mode new mode bits (for example 0777)
- * @return standard error code*/
-int ext4_chmod(const char *path, uint32_t mode);
-/**@brief Change file owner and group
- * @param path to file/dir/link
- * @param uid user id
- * @param gid group id
- * @return standard error code*/
-int ext4_chown(const char *path, uint32_t uid, uint32_t gid);
+/**@brief Get inode of file/directory/link.
+ *
+ * @param path Parh to file/dir/link.
+ * @param ret_ino Inode number.
+ * @param inode Inode internals.
+ *
+ * @return Standard error code.*/
+int ext4_raw_inode_fill(const char *path, uint32_t *ret_ino,
+ struct ext4_inode *inode);
-/**@brief Set file access time
- * @param path to file/dir/link
- * @param atime access timestamp
- * @return standard error code*/
-int ext4_file_set_atime(const char *path, uint32_t atime);
+/**@brief Check if inode exists.
+ *
+ * @param path Parh to file/dir/link.
+ * @param type Inode type.
+ * @ref EXT4_DIRENTRY_UNKNOWN
+ * @ref EXT4_DE_REG_FILE
+ * @ref EXT4_DE_DIR
+ * @ref EXT4_DE_CHRDEV
+ * @ref EXT4_DE_BLKDEV
+ * @ref EXT4_DE_FIFO
+ * @ref EXT4_DE_SOCK
+ * @ref EXT4_DE_SYMLINK
+ *
+ * @return Standard error code.*/
+int ext4_inode_exist(const char *path, int type);
-/**@brief Set file modify time
- * @param path to file/dir/link
- * @param mtime modify timestamp
- * @return standard error code*/
-int ext4_file_set_mtime(const char *path, uint32_t mtime);
+/**@brief Change file/directory/link mode bits.
+ *
+ * @param path Path to file/dir/link.
+ * @param mode New mode bits (for example 0777).
+ *
+ * @return Standard error code.*/
+int ext4_mode_set(const char *path, uint32_t mode);
+
+
+/**@brief Get file/directory/link mode bits.
+ *
+ * @param path Path to file/dir/link.
+ * @param mode New mode bits (for example 0777).
+ *
+ * @return Standard error code.*/
+int ext4_mode_get(const char *path, uint32_t *mode);
-/**@brief Set file change time
- * @param path to file/dir/link
- * @param ctime change timestamp
+/**@brief Change file owner and group.
+ *
+ * @param path Path to file/dir/link.
+ * @param uid User id.
+ * @param gid Group id.
+ *
+ * @return Standard error code.*/
+int ext4_owner_set(const char *path, uint32_t uid, uint32_t gid);
+
+/**@brief Get file/directory/link owner and group.
+ *
+ * @param path Path to file/dir/link.
+ * @param uid User id.
+ * @param gid Group id.
+ *
+ * @return Standard error code.*/
+int ext4_owner_get(const char *path, uint32_t *uid, uint32_t *gid);
+
+/**@brief Set file/directory/link access time.
+ *
+ * @param path Path to file/dir/link.
+ * @param atime Access timestamp.
+ *
+ * @return Standard error code.*/
+int ext4_atime_set(const char *path, uint32_t atime);
+
+/**@brief Set file/directory/link modify time.
+ *
+ * @param path Path to file/dir/link.
+ * @param mtime Modify timestamp.
+ *
+ * @return Standard error code.*/
+int ext4_mtime_set(const char *path, uint32_t mtime);
+
+/**@brief Set file/directory/link change time.
+ *
+ * @param path Path to file/dir/link.
+ * @param ctime Change timestamp.
+ *
+ * @return Standard error code.*/
+int ext4_ctime_set(const char *path, uint32_t ctime);
+
+/**@brief Get file/directory/link access time.
+ *
+ * @param path Path to file/dir/link.
+ * @param atime Access timestamp.
+ *
+ * @return Standard error code.*/
+int ext4_atime_get(const char *path, uint32_t *atime);
+
+/**@brief Get file/directory/link modify time.
+ *
+ * @param path Path to file/dir/link.
+ * @param mtime Modify timestamp.
+ *
+ * @return Standard error code.*/
+int ext4_mtime_get(const char *path, uint32_t *mtime);
+
+/**@brief Get file/directory/link change time.
+ *
+ * @param path Pathto file/dir/link.
+ * @param ctime Change timestamp.
+ *
* @return standard error code*/
-int ext4_file_set_ctime(const char *path, uint32_t ctime);
+int ext4_ctime_get(const char *path, uint32_t *ctime);
-/**@brief Create symbolic link
- * @param target destination path
- * @param path source entry
- * @return standard error code*/
+/**@brief Create symbolic link.
+ *
+ * @param target Destination entry path.
+ * @param path Source entry path.
+ *
+ * @return Standard error code.*/
int ext4_fsymlink(const char *target, const char *path);
+/**@brief Create special file.
+ * @param path Path to new special file.
+ * @param filetype Filetype of the new special file.
+ * (that must not be regular file, directory, or unknown type)
+ * @param dev If filetype is char device or block device,
+ * the device number will become the payload in the inode.
+ * @return Standard error code.*/
+int ext4_mknod(const char *path, int filetype, uint32_t dev);
-/**@brief Read symbolic link payload
- * @param path to symlink
- * @param buf output buffer
- * @param bufsize output buffer max size
- * @param rcnt bytes read
- * @return standard error code*/
+/**@brief Read symbolic link payload.
+ *
+ * @param path Path to symlink.
+ * @param buf Output buffer.
+ * @param bufsize Output buffer max size.
+ * @param rcnt Bytes read.
+ *
+ * @return Standard error code.*/
int ext4_readlink(const char *path, char *buf, size_t bufsize, size_t *rcnt);
-/**@brief Set extended attribute
- * @param path to file/directory
- * @param name name of the entry to add
- * @param name_len length of @name in bytes
- * @param data data of the entry to add
- * @param data_size size of data to add
- * @param replace whether existing entries should be replaced
- * @return standard error code*/
+/**@brief Set extended attribute.
+ *
+ * @param path Path to file/directory
+ * @param name Name of the entry to add.
+ * @param name_len Length of @name in bytes.
+ * @param data Data of the entry to add.
+ * @param data_size Size of data to add.
+ *
+ * @return Standard error code.*/
int ext4_setxattr(const char *path, const char *name, size_t name_len,
- const void *data, size_t data_size, bool replace);
-
-/**@brief Get extended attribute
- * @param path to file/directory
- * @param name name of the entry to get
- * @param name_len length of @name in bytes
- * @param data data of the entry to get
- * @param data_size size of data to get
- * @return standard error code*/
+ const void *data, size_t data_size);
+
+/**@brief Get extended attribute.
+ *
+ * @param path Path to file/directory.
+ * @param name Name of the entry to get.
+ * @param name_len Length of @name in bytes.
+ * @param data Data of the entry to get.
+ * @param data_size Size of data to get.
+ *
+ * @return Standard error code.*/
int ext4_getxattr(const char *path, const char *name, size_t name_len,
void *buf, size_t buf_size, size_t *data_size);
-/**@brief List extended attributes
- * @param path to file/directory
- * @param list list to hold the name of entries
- * @param size size of @list in bytes
- * @param ret_size used bytes of @list
- * @return standard error code*/
+/**@brief List extended attributes.
+ *
+ * @param path Path to file/directory.
+ * @param list List to hold the name of entries.
+ * @param size Size of @list in bytes.
+ * @param ret_size Used bytes of @list.
+ *
+ * @return Standard error code.*/
int ext4_listxattr(const char *path, char *list, size_t size, size_t *ret_size);
-/**@brief Remove extended attribute
- * @param path to file/directory
- * @param name name of the entry to remove
- * @param name_len length of @name in bytes
- * @return standard error code*/
+/**@brief Remove extended attribute.
+ *
+ * @param path Path to file/directory.
+ * @param name Name of the entry to remove.
+ * @param name_len Length of @name in bytes.
+ *
+ * @return Standard error code.*/
int ext4_removexattr(const char *path, const char *name, size_t name_len);
/*********************************DIRECTORY OPERATION***********************/
/**@brief Recursive directory remove.
- * @param path directory path to remove
- * @return standard error code*/
+ *
+ * @param path Directory path to remove
+ *
+ * @return Standard error code.*/
int ext4_dir_rm(const char *path);
+/**@brief Rename/move directory.
+ *
+ * @param path Source path.
+ * @param new_path Destination path.
+ *
+ * @return Standard error code. */
+int ext4_dir_mv(const char *path, const char *new_path);
+
/**@brief Create new directory.
- * @param name new directory name
- * @return standard error code*/
+ *
+ * @param path Directory name.
+ *
+ * @return Standard error code.*/
int ext4_dir_mk(const char *path);
/**@brief Directory open.
- * @param d directory handle
- * @param path directory path
- * @return standard error code*/
-int ext4_dir_open(ext4_dir *d, const char *path);
+ *
+ * @param dir Directory handle.
+ * @param path Directory path.
+ *
+ * @return Standard error code.*/
+int ext4_dir_open(ext4_dir *dir, const char *path);
/**@brief Directory close.
- * @param d directory handle
- * @return standard error code*/
-int ext4_dir_close(ext4_dir *d);
+ *
+ * @param dir directory handle.
+ *
+ * @return Standard error code.*/
+int ext4_dir_close(ext4_dir *dir);
/**@brief Return next directory entry.
- * @param d directory handle
- * @param id entry id
- * @return directory entry id (NULL if no entry)*/
-const ext4_direntry *ext4_dir_entry_next(ext4_dir *d);
+ *
+ * @param dir Directory handle.
+ *
+ * @return Directory entry id (NULL if no entry)*/
+const ext4_direntry *ext4_dir_entry_next(ext4_dir *dir);
/**@brief Rewine directory entry offset.
- * @param d directory handle*/
-void ext4_dir_entry_rewind(ext4_dir *d);
+ *
+ * @param dir Directory handle.*/
+void ext4_dir_entry_rewind(ext4_dir *dir);
#ifdef __cplusplus
projects / lwext4.git / blobdiff