-struct dir
- {
- size_t entry_cnt;
- struct dir_entry *entries;
- };
-
-struct dir_entry
- {
- bool in_use;
- char name[FILENAME_LEN_MAX + 1];
- disk_sector_no filehdr_sector;
- };
-
-struct file;
-bool dir_init (struct dir *, size_t entry_cnt);
-void dir_destroy (struct dir *);
-void dir_read (struct dir *, struct file *);
-void dir_write (struct dir *, struct file *);
-bool dir_lookup (const struct dir *, const char *name, disk_sector_no *);
-bool dir_add (struct dir *, const char *name, disk_sector_no);
+struct inode;
+bool dir_create (disk_sector_t sector, size_t entry_cnt);
+struct dir *dir_open (struct inode *);
+struct dir *dir_open_root (void);
+struct dir *dir_reopen (struct dir *);
+void dir_close (struct dir *);
+struct inode *dir_get_inode (struct dir *);
+bool dir_lookup (const struct dir *, const char *name, struct inode **);
+bool dir_add (struct dir *, const char *name, disk_sector_t);