What were you trying to do that didn't work?

There are critical errors in storage.log when running installation on a system with an preexisting btrfs filesystem:

INFO:program:Running... mount -t btrfs -o subvolid=5 /dev/vda3 /tmp/btrfs-tmp.36gp81km9c
INFO:program:stderr:
INFO:program:b"mount: /tmp/btrfs-tmp.36gp81km9c: unknown filesystem type 'btrfs'."
INFO:program:b'       dmesg(1) may have more information after failed mount system call.'
DEBUG:program:Return code: 32
CRITICAL:program:The function 'bd_btrfs_list_subvolumes' called, but not implemented!
DEBUG:blivet:failed to list subvolumes: The function 'bd_btrfs_list_subvolumes' called, but not implemented!

In https://github.com/rhinstaller/kickstart-tests/issues/1105#issuecomment-2024961116 it was mentioned the problem should be fixed by https://github.com/storaged-project/blivet/pull/1217, but the problem still exists in python-blivet-3.10.0-1.el10.

Please provide the package NVR for which bug is seen:

python-blivet-3.10.0-1.el10

How reproducible:

Always

Steps to reproduce

1. Install Fedora Workstation with the default partitioning scheme (btrfs).
2. Start a RHEL-10 installation, proceed to the main hub
3. Check /tmp/storage.log

Expected results

No critical errors

Actual results

CRITICAL:program:The function 'bd_btrfs_list_subvolumes' called, but not implemented!