/* * 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; /* 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