rt-thread-official/components/dfs/include/dfs_fs.h

92 lines
2.9 KiB
C

/*
* File : dfs_fs.h
* This file is part of Device File System in RT-Thread RTOS
* COPYRIGHT (C) 2004-2010, RT-Thread Development Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE.
*
* Change Logs:
* Date Author Notes
* 2005-02-22 Bernard The first version.
*/
#ifndef __DFS_FS_H__
#define __DFS_FS_H__
#include <dfs_def.h>
#include <dfs_config.h>
/* Pre-declaration */
struct dfs_filesystem;
struct dfs_fd;
struct dfs_dirent;
/* File system operations struct */
struct dfs_filesystem_operation
{
char *name;
/* mount and unmount file system */
int (*mount) (struct dfs_filesystem* fs, unsigned long rwflag, const void* data);
int (*unmount) (struct dfs_filesystem* fs);
/* make a file system */
int (*mkfs) (const char* device_name);
int (*statfs) (struct dfs_filesystem* fs, struct _statfs *buf);
int (*open) (struct dfs_fd* fd);
int (*close) (struct dfs_fd* fd);
int (*ioctl) (struct dfs_fd* fd, int cmd, void *args);
int (*read) (struct dfs_fd* fd, void* buf, rt_size_t count);
int (*write) (struct dfs_fd* fd, const void* buf, rt_size_t count);
int (*flush) (struct dfs_fd* fd);
int (*lseek) (struct dfs_fd* fd, rt_off_t offset);
int (*getdents) (struct dfs_fd* fd, struct _dirent* dirp, rt_uint32_t count);
int (*unlink) (struct dfs_filesystem* fs, const char* pathname);
int (*stat) (struct dfs_filesystem* fs, const char* filename, struct _stat* buf);
int (*rename) (struct dfs_filesystem* fs, const char* oldpath, const char* newpath);
};
/* Mounted file system */
struct dfs_filesystem
{
rt_device_t dev_id; /* Attached device */
char* path; /* File system mount point */
const struct dfs_filesystem_operation* ops; /* Operations for file system type */
void *data; /* Specific file system data */
};
/* file system partition table */
struct dfs_partition
{
rt_uint8_t type; /* file system type */
rt_off_t offset; /* partition start offset */
rt_size_t size; /* partition size */
rt_sem_t lock;
};
int dfs_register(const struct dfs_filesystem_operation* ops);
struct dfs_filesystem* dfs_filesystem_lookup(const char *path);
rt_err_t dfs_filesystem_get_partition(struct dfs_partition* part, rt_uint8_t* buf, rt_uint32_t pindex);
int dfs_mount(const char* device_name, const char* path,
const char* filesystemtype, rt_uint32_t rwflag, const
void* data);
int dfs_unmount(const char *specialfile);
/* extern variable */
extern const struct dfs_filesystem_operation* filesystem_operation_table[];
extern struct dfs_filesystem filesystem_table[];
extern char working_directory[];
void dfs_lock(void);
void dfs_unlock(void);
int dfs_statfs(const char* path, struct _statfs* buffer);
#endif