A simplified view of the dentry object is shown in Figure 5.
图5展示了dentry对象的简化图示。
The file object refers to a dentry object, which refers to an inode.
file对象引用dentry对象，后者引用inode。
Both the inode and dentry objects refer to the underlying super_block object.
inode和dentry对象都引用底层的super_block对象。
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