Adjust directory structure

2021-06-03 17:38:11 +08:00
parent 92301257f3
commit 89a2236b18
1993 changed files with 40 additions and 0 deletions
@@ -0,0 +1,133 @@
+/*
+ * Copyright (c) 2020 AIIT XUOS Lab
+ * XiUOS is licensed under Mulan PSL v2.
+ * You can use this software according to the terms and conditions of the Mulan PSL v2.
+ * You may obtain a copy of Mulan PSL v2 at:
+ *        http://license.coscl.org.cn/MulanPSL2
+ * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
+ * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
+ * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+ * See the Mulan PSL v2 for more details.
+ */
+
+#ifndef _INC_IOT_VFS_H_
+#define _INC_IOT_VFS_H_
+
+#include <xiuos.h>
+#include <bus.h>
+
+#define MAX_FILE_NAME 255
+#define MAX_PATH MAX_FILE_NAME
+
+enum FilesystemType
+{
+    FSTYPE_FATFS = 0,
+    FSTYPE_IOTDEVICEFILE,
+    FSTYPE_CH376,
+    FSTYPE_END,
+};
+
+enum x_FileType
+{
+    FTYPE_FILE = 0,
+    FTYPE_DIR,
+    FTYPE_SOCKET,
+    FTYPE_END,
+};
+
+struct Filesystem;
+
+struct MountPoint
+{
+    struct SysDoubleLinklistNode node;
+    enum FilesystemType fs_type;
+    char *mnt_point;
+    size_t mnt_point_len;
+    void *fs_data;
+    BusType bus;
+    HardwareDevType dev;
+    DriverType drv;
+    struct Filesystem *fs;
+};
+
+struct FileStat
+{
+    enum x_FileType type;
+    char name[MAX_FILE_NAME + 1];
+    size_t size;
+    time_t mtime;
+};
+
+struct statfs
+{
+    size_t f_bsize;
+    size_t f_blocks;
+    size_t f_bfree;
+};
+
+#define FD_MAX 64
+#define FD_OFFSET 3
+
+struct FileDescriptor
+{
+    char *path;
+    enum x_FileType type;
+    void *data; 
+    struct MountPoint *mntp;
+    off_t pos;
+};
+
+int NewFileDescriptor(struct FileDescriptor **fdptr);
+struct FileDescriptor *GetFileDescriptor(int fd);
+void FreeFileDescriptor(struct FileDescriptor *fdp);
+
+struct dirent
+{
+    int d_kind;
+    char d_name[MAX_PATH + 1];
+};
+
+/* NOTE: all path arguments must be relative path under mount point */
+struct Filesystem
+{
+    int (*open)(struct FileDescriptor *fdp, const char *path);
+    int (*close)(struct FileDescriptor *fdp);
+    ssize_t (*read)(struct FileDescriptor *fdp, void *dst, size_t len);
+    ssize_t (*write)(struct FileDescriptor *fdp, const void *src, size_t len);
+    int (*seek)(struct FileDescriptor *fdp, off_t offset, int whence, off_t *new_offset);
+    off_t (*tell)(struct FileDescriptor *fdp);
+    int (*truncate)(struct FileDescriptor *fdp, off_t length);
+    int (*sync)(struct FileDescriptor *fdp);
+
+    int (*ioctl)(struct FileDescriptor *fdp, int cmd, void *args);
+    int (*poll)(struct FileDescriptor *fdp, struct Pollreq *req);
+
+    int (*opendir)(struct FileDescriptor *fdp, const char *path);
+    int (*closedir)(struct FileDescriptor *fdp);
+    int (*readdir)(struct FileDescriptor *fdp, struct dirent *dirent);
+    int (*seekdir)(struct FileDescriptor *fdp, off_t offset);
+
+    int (*mount)(struct MountPoint *mp);
+    int (*unmount)(struct MountPoint *mp);
+    int (*unlink)(struct MountPoint *mp, const char *path);
+    int (*rename)(struct MountPoint *mp, const char *from,
+            const char *to);
+    int (*mkdir)(struct MountPoint *mp, const char *path);
+    int (*stat)(struct MountPoint *mp, const char *path,
+            struct FileStat *buf);
+    int (*statvfs)(struct MountPoint *mp, const char *path,
+            struct statfs *buf);
+};
+
+int RegisterFilesystem(enum FilesystemType fs_type,
+        struct Filesystem *fs);
+
+int MountFilesystem(const char *bus_name,
+        const char *dev_name, const char *drv_name,
+        enum FilesystemType fs_type, const char *path);
+
+int UnmountFileSystem(const char *path);
+
+void SyncOpenedFiles();
+
+#endif /* _INC_IOT_VFS_H_ */