linux,- VFS- dentry objects

dentry objects

quoted form "Understanding the Linux kernel by Bovet and Cesati (2006), page 475.

1. the VFS consifers each directory a file that contains a list of files and othr directories.

2. once a " directory entry " is read into memory, however, it is transformed by the VFS into a dentry object
based on the dentry structure.

3. The kernel creates a dentry object for every component of a pathname that a process looks up; the dentry
object associates the component to its corresponding inode.

4. eg, when looking up the /tmp/test pathname, the kernel creates a
dentry object for the / root directory, a 2nd dentry object for the tmp entry of the root directory, and a 3rd dentry object
for the test entry of the /tmp directory.

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