xfs_spaceman(8) on Linux
The text 6922e730c9f8, as Debian 12 (Bookworm), Debian 11 (Bullseye) shipped it.
show free space information about an XFS filesystem
Flags it lists
-
-a -
-b -
-c -
-d -
-e -
-f -
-g -
-h -
-i -
-m -
-p -
-q -
-r -
-s -
-u