debugfs(8) on Linux
The text d6dcb65f1e26, as Debian 13 (Trixie) shipped it.
ext2/ext3/ext4 file system debugger
Flags it lists
-
-D -
-R -
-V -
-b -
-c -
-d -
-f -
-i -
-n -
-s -
-w