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/*
* File : dfs_fs.h
* This file is part of Device File System in RT-Thread RTOS
* COPYRIGHT (C) 2004-2012, RT-Thread Development Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Change Logs:
* Date Author Notes
* 2005-02-22 Bernard The first version.
*/
#ifndef __DFS_FS_H__
#define __DFS_FS_H__
#include <dfs_def.h>
#define DFS_FS_FLAG_DEFAULT 0x00 /* default flag */
#define DFS_FS_FLAG_FULLPATH 0x01 /* set full path to underlaying file system */
/* Pre-declaration */
struct dfs_filesystem;
struct dfs_fd;
/* File system operations struct */
struct dfs_filesystem_operation
{
char *name;
rt_uint32_t flags; /* flags for file system operations */
/* 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) (rt_device_t devid);
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;
};
/* mount table */
struct dfs_mount_tbl
{
const char *device_name;
const char *path;
const char *filesystemtype;
unsigned long rwflag;
const void *data;
};
int dfs_register(const struct dfs_filesystem_operation *ops);
struct dfs_filesystem *dfs_filesystem_lookup(const char *path);
const char* dfs_filesystem_get_mounted_path(struct rt_device* device);
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 const struct dfs_mount_tbl mount_table[];
extern char working_directory[];
void dfs_lock(void);
void dfs_unlock(void);
int dfs_mkfs(const char *fs_name, const char *device_name);
int dfs_statfs(const char *path, struct statfs *buffer);
#endif
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