Automatically check whether to disable cache during prepare

src/disk_tool.h

@@ -131,7 +131,7 @@ void fromhexstr(const std::string & from, int bytes, uint8_t *to);
 std::string realpath_str(std::string path, bool nofail = true);
 std::string read_all_fd(int fd);
 std::string read_file(std::string file, bool allow_enoent = false);
-int check_queue_cache(std::string dev, std::string parent_dev);
+int disable_cache(std::string dev);
 std::string get_parent_device(std::string dev);
 bool json_is_true(const json11::Json & val);
 int shell_exec(const std::vector<std::string> & cmd, const std::string & in, std::string *out, std::string *err);