Figure 2-2 illustrates the general idea: whenever the system wants to carry out an operation on a device, it sends an IRP to the topmost filter driver in the stack.

 
  • 图2-2阐明了这个大意:无论什么时候系统想要在一个设备上执行一个操作,它给在堆栈中最上层的过滤器发送一个IRP。
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