134 lines
3.4 KiB
C
134 lines
3.4 KiB
C
/*
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* Copyright (c) 2020 AIIT XUOS Lab
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* XiUOS is licensed under Mulan PSL v2.
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* You can use this software according to the terms and conditions of the Mulan PSL v2.
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* You may obtain a copy of Mulan PSL v2 at:
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* http://license.coscl.org.cn/MulanPSL2
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* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
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* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
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* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
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* See the Mulan PSL v2 for more details.
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*/
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#ifndef _INC_IOT_VFS_H_
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#define _INC_IOT_VFS_H_
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#include <xiuos.h>
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#include <bus.h>
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#define MAX_FILE_NAME 255
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#define MAX_PATH MAX_FILE_NAME
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enum FilesystemType
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{
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FSTYPE_FATFS = 0,
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FSTYPE_IOTDEVICEFILE,
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FSTYPE_CH376,
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FSTYPE_END,
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};
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enum x_FileType
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{
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FTYPE_FILE = 0,
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FTYPE_DIR,
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FTYPE_SOCKET,
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FTYPE_END,
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};
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struct Filesystem;
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struct MountPoint
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{
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struct SysDoubleLinklistNode node;
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enum FilesystemType fs_type;
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char *mnt_point;
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size_t mnt_point_len;
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void *fs_data;
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BusType bus;
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HardwareDevType dev;
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DriverType drv;
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struct Filesystem *fs;
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};
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struct FileStat
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{
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enum x_FileType type;
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char name[MAX_FILE_NAME + 1];
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size_t size;
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time_t mtime;
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};
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struct statfs
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{
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size_t f_bsize;
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size_t f_blocks;
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size_t f_bfree;
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};
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#define FD_MAX 64
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#define FD_OFFSET 3
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struct FileDescriptor
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{
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char *path;
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enum x_FileType type;
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void *data;
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struct MountPoint *mntp;
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off_t pos;
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};
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int NewFileDescriptor(struct FileDescriptor **fdptr);
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struct FileDescriptor *GetFileDescriptor(int fd);
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void FreeFileDescriptor(struct FileDescriptor *fdp);
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struct dirent
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{
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int d_kind;
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char d_name[MAX_PATH + 1];
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};
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/* NOTE: all path arguments must be relative path under mount point */
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struct Filesystem
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{
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int (*open)(struct FileDescriptor *fdp, const char *path);
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int (*close)(struct FileDescriptor *fdp);
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ssize_t (*read)(struct FileDescriptor *fdp, void *dst, size_t len);
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ssize_t (*write)(struct FileDescriptor *fdp, const void *src, size_t len);
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int (*seek)(struct FileDescriptor *fdp, off_t offset, int whence, off_t *new_offset);
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off_t (*tell)(struct FileDescriptor *fdp);
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int (*truncate)(struct FileDescriptor *fdp, off_t length);
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int (*sync)(struct FileDescriptor *fdp);
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int (*ioctl)(struct FileDescriptor *fdp, int cmd, void *args);
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int (*poll)(struct FileDescriptor *fdp, struct Pollreq *req);
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int (*opendir)(struct FileDescriptor *fdp, const char *path);
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int (*closedir)(struct FileDescriptor *fdp);
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int (*readdir)(struct FileDescriptor *fdp, struct dirent *dirent);
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int (*seekdir)(struct FileDescriptor *fdp, off_t offset);
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int (*mount)(struct MountPoint *mp);
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int (*unmount)(struct MountPoint *mp);
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int (*unlink)(struct MountPoint *mp, const char *path);
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int (*rename)(struct MountPoint *mp, const char *from,
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const char *to);
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int (*mkdir)(struct MountPoint *mp, const char *path);
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int (*stat)(struct MountPoint *mp, const char *path,
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struct FileStat *buf);
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int (*statvfs)(struct MountPoint *mp, const char *path,
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struct statfs *buf);
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};
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int RegisterFilesystem(enum FilesystemType fs_type,
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struct Filesystem *fs);
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int MountFilesystem(const char *bus_name,
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const char *dev_name, const char *drv_name,
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enum FilesystemType fs_type, const char *path);
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int UnmountFileSystem(const char *path);
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void SyncOpenedFiles();
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#endif /* _INC_IOT_VFS_H_ */
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