99 lines
3.2 KiB
C
99 lines
3.2 KiB
C
/*
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* File : dfs_fs.h
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* This file is part of Device File System in RT-Thread RTOS
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* COPYRIGHT (C) 2004-2012, RT-Thread Development Team
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rt-thread.org/license/LICENSE.
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*
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* Change Logs:
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* Date Author Notes
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* 2005-02-22 Bernard The first version.
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*/
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#ifndef __DFS_FS_H__
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#define __DFS_FS_H__
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#include <dfs_def.h>
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#define DFS_FS_FLAG_DEFAULT 0x00 /* default flag */
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#define DFS_FS_FLAG_FULLPATH 0x01 /* set full path to underlaying file system */
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/* Pre-declaration */
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struct dfs_filesystem;
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struct dfs_fd;
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/* File system operations struct */
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struct dfs_filesystem_operation
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{
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char *name;
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rt_uint32_t flags; /* flags for file system operations */
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/* mount and unmount file system */
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int (*mount) (struct dfs_filesystem *fs, unsigned long rwflag, const void *data);
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int (*unmount) (struct dfs_filesystem *fs);
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/* make a file system */
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int (*mkfs) (const char *device_name);
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int (*statfs) (struct dfs_filesystem *fs, struct statfs *buf);
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int (*open) (struct dfs_fd *fd);
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int (*close) (struct dfs_fd *fd);
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int (*ioctl) (struct dfs_fd *fd, int cmd, void *args);
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int (*read) (struct dfs_fd *fd, void *buf, rt_size_t count);
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int (*write) (struct dfs_fd *fd, const void *buf, rt_size_t count);
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int (*flush) (struct dfs_fd *fd);
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int (*lseek) (struct dfs_fd *fd, rt_off_t offset);
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int (*getdents) (struct dfs_fd *fd, struct dirent *dirp, rt_uint32_t count);
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int (*unlink) (struct dfs_filesystem *fs, const char *pathname);
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int (*stat) (struct dfs_filesystem *fs, const char *filename, struct stat *buf);
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int (*rename) (struct dfs_filesystem *fs, const char *oldpath, const char *newpath);
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};
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/* Mounted file system */
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struct dfs_filesystem
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{
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rt_device_t dev_id; /* Attached device */
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char *path; /* File system mount point */
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const struct dfs_filesystem_operation *ops; /* Operations for file system type */
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void *data; /* Specific file system data */
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};
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/* file system partition table */
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struct dfs_partition
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{
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rt_uint8_t type; /* file system type */
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rt_off_t offset; /* partition start offset */
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rt_size_t size; /* partition size */
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rt_sem_t lock;
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};
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int dfs_register(const struct dfs_filesystem_operation *ops);
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struct dfs_filesystem *dfs_filesystem_lookup(const char *path);
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rt_err_t dfs_filesystem_get_partition(struct dfs_partition *part,
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rt_uint8_t *buf,
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rt_uint32_t pindex);
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int dfs_mount(const char *device_name,
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const char *path,
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const char *filesystemtype,
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rt_uint32_t rwflag,
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const void *data);
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int dfs_unmount(const char *specialfile);
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/* extern variable */
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extern const struct dfs_filesystem_operation *filesystem_operation_table[];
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extern struct dfs_filesystem filesystem_table[];
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extern char working_directory[];
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void dfs_lock(void);
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void dfs_unlock(void);
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int dfs_statfs(const char *path, struct statfs *buffer);
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#endif
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