Initial commit

include/disk_io.h

@@ -0,0 +1,16 @@
+#pragma once
+
+#include "simplefs.h"
+#include <cstdint>
+#include <vector>
+
+using DeviceFd = int;
+
+// 读取单个块
+int read_block(DeviceFd fd, uint32_t block_num, void* buffer);
+
+// 写入单个块
+int write_block(DeviceFd fd, uint32_t block_num, const void* buffer);
+
+// 写入零块
+int write_zero_blocks(DeviceFd fd, uint32_t start_block_num, uint32_t count);