repair is broken on encrypted drive (with btrfs root)

[ser]

Describe the bug
cryptsetup luksOpen /dev/drive drive
mount /dev/mapper/drive /mnt
swupd repair --picky --root=/mnt

gives

Calling post-update helper scripts
[ERROR] cbm (../src/lib/files.c:L165): Invalid block device: /mnt
[ERROR] cbm (../src/lib/system_stub.c:L31): Invalid block device: 0:58
Out of memory
[FATAL] cbm (../src/bootman/sysconfig.c:L275): sysconfig insane: Missing root device
[FATAL] cbm (../src/bootman/update.c:L127): Cannot install kernel /mnt//usr/lib/kernel/org.clearlinux.native.5.3.2-844

Repair successful

To Reproduce
Install clear linux with encryption, btrfs-convert /dev/drive from installer media, system does not boot, try to fix with the above command

Expected behavior
fixing boot by checking that filesystem ID has changed during btrfs convertion

Environment (please complete the following information):
swupd-client 3.22.3
Installed version: 31140

[otaviobp]

This looks like a problem related to CBM. I'll transfer the issue

[seanvk]

CBM doesn't support btrfs to my knowledge. Which is kind of unfortunate but CBM has other boot/security roles beyond just supporting systemd-boot. So although on other distributions you can freely use btrfs with systemd-boot, CBM cannot.

[ahkok]

CBM doesn't support btrfs to my knowledge

That would IMHO be a bug. One that needs fixing.

[ahkok]

Note that btrfs-convert isn't the same as making a new btrfs filesystem. I would NOT recommend btrfs-convert. It's method includes rollback support to ext4, and is likely therefore confusing programs that look at the block content. We first want to assure that filesystems created with mkfs.btrfs work anyway.

[ser]

It would be perfect if installer supports btrfs, but it does not.

I have successfully converted and run clear on btrfs again, but had to manually update a boot text file with a new filesystem ID as it changes after the conversion process