90 lines
2.8 KiB
C
90 lines
2.8 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) 2004-2010, 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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/* 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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/* 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, rt_uint8_t* buf, rt_uint32_t pindex);
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int dfs_mount(const char* device_name, const char* path,
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const char* filesystemtype, rt_uint32_t rwflag, const
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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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