Table of Contents
Preface
Part 1: Diving into the Virtual Filesystem
1
Where It All Starts From – The Virtual Filesystem
Technical requirements
Understanding storage in a modern-day data center
Interacting with storage in Linux
Understanding system calls
Explaining the need for a Virtual Filesystem
Describing the VFS
Implementing a common filesystem interface through the VFS
Peeking at the source code
Tracing VFS functions
Explaining the Everything is a file philosophy
Summary
2
Explaining the Data Structures in a VFS
Technical requirements
Data structures in VFS
Inodes – indexing files and directories
Defining an inode in the kernel
Defining inode operations
Tracking file data on disk through inodes
Can a filesystem run out of inodes?
Directory ...
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