linux-ext4 - has_casefold_inode() checks free inodes

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Message-ID: <3jdnbhtxrihgnsqyaotqudefedwzmg2ha4fba72cj2s2ddyr4v@mc2pamq6cnys>
Date: Thu, 12 Sep 2024 03:33:36 +0200
From: Fabian Pack <projekte.linux.ext4@...ox.aber.nicht.jetzt>
To: linux-ext4@...r.kernel.org
Subject: has_casefold_inode() checks free inodes

Hi,
I found out that current tune2fs won't let me remove the casefold flag 
from a filesystem where it was once used, even after deleting all 
directories using the flag. A community debugging session later it seems 
to me that has_casefold_inode() in tune2fs.c will not only check used 
inodes but free ones as well, so it refuses because casefolded 
directories were present in the past and their inodes have not yet been 
reused.

Is this intentional or did we find a bug?

Best regards,
Fabian