title: Can ext4 detect corrupted file contents?
body: <p>Can the ext4 filesystem detect data corruption of file contents? If yes, is it enabled by default and how can I check for corrupted data?</p>
  
  <p>I have read that ext4 maintains checksums for file metadata and its journal, but I was unable to find any information on checksums for the actual file contents.</p>
  
  <p>For clarity: I want to know if a file has changed since the last write operation.</p>