Update

src/filesys/inode.h

+#ifndef FILESYS_INODE_H
+#define FILESYS_INODE_H
+
+#include <stdbool.h>
+#include "filesys/off_t.h"
+#include "devices/block.h"
+
+struct bitmap;
+
+void inode_init (void);
+bool inode_create (block_sector_t, off_t);
+struct inode *inode_open (block_sector_t);
+struct inode *inode_reopen (struct inode *);
+block_sector_t inode_get_inumber (const struct inode *);
+void inode_close (struct inode *);
+void inode_remove (struct inode *);
+off_t inode_read_at (struct inode *, void *, off_t size, off_t offset);
+off_t inode_write_at (struct inode *, const void *, off_t size, off_t offset);
+void inode_deny_write (struct inode *);
+void inode_allow_write (struct inode *);
+off_t inode_length (const struct inode *);
+
+#endif /* filesys/inode.h */