tytso
e2fsprogs 1.46.5 and earlier cannot fsck ext4 filesystems created with 1.47.0 (due to new orphan_file feature)
If you try to use e2fsck from e2fsprogs 1.46.5 or earlier to check a filesystem created with e2fsprogs 1.47.0, it fails:
May 25 14:08:46 fedora systemd-fsck[566]: /dev/vda2 has unsupported feature(s): FEATURE_C12
May 25 14:08:46 fedora systemd-fsck[566]: e2fsck: Get a newer version of e2fsck!
May 25 14:08:46 fedora systemd-fsck[566]: /dev/vda2: ********** WARNING: Filesystem still has errors **********
May 25 14:08:46 fedora systemd-fsck[564]: fsck failed with exit status 12.
this seems to be caused by the new orphan_file feature being enabled by default in 1.47.0. So far, this has caused issues for Debian and Fedora.
This issue is specifically about the very sudden cut-off here. If the description was e.g. "e2fsprogs 1.42.0 and earlier cannot fsck filesystems created with 1.47.0", I'd be less inclined to file a bug. I'm not sure if the sudden transition was intended, but it feels a bit odd. I would kinda have expected that the new feature would be supported-but-not-enabled for a few releases, so that when it was enabled by default, the last few versions could still fsck filesystems created with it. Is this not how e2fsprogs does things?
