图4简明地阐释了这一点。另外还有一些其他的对象，用于支持inode位图(用于inode分配)等。

This is illustrated in simple form in Figure 4. Other objects exist to support things like inode bitmaps (for inode allocation).

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可传一个文件映射对象的句柄来创始位图。或者让系统为位图分配内存。

You can supply a handle to a file-mapping object that the function will use to create the bitmap, or you can let the system allocate the memory for the bitmap.

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