PSA: Issue with btrfs-progs 6.1 and grub-btrfs - snapshots not addded to menu

dalto · December 27, 2022, 4:47pm

If you use grub-btrfs it seems like the recent update to btrfs-progs breaks snapshots adding to the menu.

More information here:

Snapshots not being detected

opened 02:48AM - 27 Dec 22 UTC

After a recent update on EndeavourOS, grub-btrfs has not been able to find snaps…hots in the directory. It is able to detect whenever snapshots are created or deleted, and it gives this output whenever that happens: ``` sudo grub-btrfsd /.snapshots --verbose grub-btrfsd starting up... Watching /.snapshots for new snapshots... Detected snapshot creation/ deletion, recreating Grub menu Detecting snapshots ... No snapshots found. If you think an error has occurred, please file a bug report at "https://github.com/Antynea/grub-btrfs" Unmount /tmp/grub-btrfs.PvfTtjMUFv .. Success Grub submenu recreated ``` I do have snapshots in the /.snapshots directory though. I am using a layout similar to the one on the [Archwiki snapper page](https://wiki.archlinux.org/title/Snapper#Suggested_filesystem_layout) where they are stored on a separate @snapshots subvolume and mounted to /.snapshots. ``` sudo ls -al /.snapshots drwxr-x--- 1 root root 338 Dec 26 20:33 . drwxr-xr-x 1 root root 150 Oct 19 19:09 .. drwxr-xr-x 1 root root 32 Aug 29 14:21 1 drwxr-xr-x 1 root root 32 Nov 7 11:28 1040 drwxr-xr-x 1 root root 32 Nov 7 12:38 1056 drwxr-xr-x 1 root root 32 Dec 14 14:00 1633 drwxr-xr-x 1 root root 32 Dec 18 12:12 1643 drwxr-xr-x 1 root root 32 Dec 26 01:10 1645 drwxr-xr-x 1 root root 72 Dec 18 13:12 1646 drwxr-xr-x 1 root root 32 Dec 26 01:10 1656 drwxr-xr-x 1 root root 72 Dec 18 23:35 1657 drwxr-xr-x 1 root root 32 Dec 19 00:00 1658 drwxr-xr-x 1 root root 32 Dec 20 00:00 1661 drwxr-xr-x 1 root root 32 Dec 20 22:00 1664 drwxr-xr-x 1 root root 32 Dec 21 20:00 1665 drwxr-xr-x 1 root root 32 Dec 26 01:10 1666 drwxr-xr-x 1 root root 72 Dec 21 20:34 1667 drwxr-xr-x 1 root root 32 Dec 21 20:38 1670 drwxr-xr-x 1 root root 72 Dec 21 20:39 1671 drwxr-xr-x 1 root root 32 Dec 26 01:10 1672 drwxr-xr-x 1 root root 72 Dec 25 16:50 1673 drwxr-xr-x 1 root root 32 Dec 26 01:10 1674 drwxr-xr-x 1 root root 72 Dec 25 16:50 1675 drwxr-xr-x 1 root root 32 Dec 25 16:51 1676 drwxr-xr-x 1 root root 72 Dec 25 16:51 1677 drwxr-xr-x 1 root root 32 Dec 25 16:51 1678 drwxr-xr-x 1 root root 72 Dec 25 16:51 1679 drwxr-xr-x 1 root root 32 Dec 25 17:00 1680 drwxr-xr-x 1 root root 32 Dec 26 13:43 1681 drwxr-xr-x 1 root root 72 Dec 25 17:11 1682 drwxr-xr-x 1 root root 32 Dec 26 01:00 1683 drwxr-xr-x 1 root root 32 Dec 26 13:43 1684 drwxr-xr-x 1 root root 72 Dec 26 13:19 1685 drwxr-xr-x 1 root root 32 Dec 26 13:21 1686 drwxr-xr-x 1 root root 72 Dec 26 13:21 1687 drwxr-xr-x 1 root root 32 Dec 26 13:26 1688 drwxr-xr-x 1 root root 72 Dec 26 13:26 1689 drwxr-xr-x 1 root root 32 Dec 26 13:26 1690 drwxr-xr-x 1 root root 72 Dec 26 13:27 1691 drwxr-xr-x 1 root root 32 Dec 26 14:00 1692 drwxr-xr-x 1 root root 32 Dec 26 14:10 1693 drwxr-xr-x 1 root root 72 Dec 26 14:10 1694 drwxr-xr-x 1 root root 32 Dec 26 14:13 1696 drwxr-xr-x 1 root root 72 Dec 26 14:13 1697 drwxr-xr-x 1 root root 32 Dec 26 20:33 1698 ``` This also happens when I run grub-mkconfig manually. I have installed the inotify-tools optional dependency and disabled the old grub-btrfs.path systemd unit, since it seems to have been replaced with grub-btrfsd from what I can gather.

storm · December 27, 2022, 9:54pm

Thanks, dalto and bjroden.

For now I got back to version 6.0.2-1 from /var/cache/pacman/pkg/btrfs-progs-6.0.2-1-x86_64.pkg.tar.zst
and flagged
IgnorePkg = btrfs-progs
in /etc/pacman.conf

sudo downgrade btrfs-progs
sudo grub-mkconfig -o /boot/grub/grub.cfg

reboot

By so doing, it works again both in UEFI and legacy bios.

Hope it will be fixed soon: all the best,
Piero

ddnn · December 28, 2022, 3:23pm

Maybe pin this post and mark @storm 's reply as the temporary solution?

dalto · December 28, 2022, 4:03pm

I don’t think this issue needs to be pinned since it impacts a relatively small number of people in a non-breaking manner.

Since I would never recommend running your system in a partially updated scenario, I don’t think marking that as the solution is a good idea.

ddnn · December 28, 2022, 4:19pm

Makes sense.

storm · December 29, 2022, 2:19pm

Maybe this one by TheLinuxNinja, too:

github.com/Antynea/grub-btrfs

Snapshots not being detected

opened 02:48AM - 27 Dec 22 UTC

closed 05:29PM - 26 Mar 23 UTC

bjroden

After a recent update on EndeavourOS, grub-btrfs has not been able to find snaps…hots in the directory. It is able to detect whenever snapshots are created or deleted, and it gives this output whenever that happens: ``` sudo grub-btrfsd /.snapshots --verbose grub-btrfsd starting up... Watching /.snapshots for new snapshots... Detected snapshot creation/ deletion, recreating Grub menu Detecting snapshots ... No snapshots found. If you think an error has occurred, please file a bug report at "https://github.com/Antynea/grub-btrfs" Unmount /tmp/grub-btrfs.PvfTtjMUFv .. Success Grub submenu recreated ``` I do have snapshots in the /.snapshots directory though. I am using a layout similar to the one on the [Archwiki snapper page](https://wiki.archlinux.org/title/Snapper#Suggested_filesystem_layout) where they are stored on a separate @snapshots subvolume and mounted to /.snapshots. ``` sudo ls -al /.snapshots drwxr-x--- 1 root root 338 Dec 26 20:33 . drwxr-xr-x 1 root root 150 Oct 19 19:09 .. drwxr-xr-x 1 root root 32 Aug 29 14:21 1 drwxr-xr-x 1 root root 32 Nov 7 11:28 1040 drwxr-xr-x 1 root root 32 Nov 7 12:38 1056 drwxr-xr-x 1 root root 32 Dec 14 14:00 1633 drwxr-xr-x 1 root root 32 Dec 18 12:12 1643 drwxr-xr-x 1 root root 32 Dec 26 01:10 1645 drwxr-xr-x 1 root root 72 Dec 18 13:12 1646 drwxr-xr-x 1 root root 32 Dec 26 01:10 1656 drwxr-xr-x 1 root root 72 Dec 18 23:35 1657 drwxr-xr-x 1 root root 32 Dec 19 00:00 1658 drwxr-xr-x 1 root root 32 Dec 20 00:00 1661 drwxr-xr-x 1 root root 32 Dec 20 22:00 1664 drwxr-xr-x 1 root root 32 Dec 21 20:00 1665 drwxr-xr-x 1 root root 32 Dec 26 01:10 1666 drwxr-xr-x 1 root root 72 Dec 21 20:34 1667 drwxr-xr-x 1 root root 32 Dec 21 20:38 1670 drwxr-xr-x 1 root root 72 Dec 21 20:39 1671 drwxr-xr-x 1 root root 32 Dec 26 01:10 1672 drwxr-xr-x 1 root root 72 Dec 25 16:50 1673 drwxr-xr-x 1 root root 32 Dec 26 01:10 1674 drwxr-xr-x 1 root root 72 Dec 25 16:50 1675 drwxr-xr-x 1 root root 32 Dec 25 16:51 1676 drwxr-xr-x 1 root root 72 Dec 25 16:51 1677 drwxr-xr-x 1 root root 32 Dec 25 16:51 1678 drwxr-xr-x 1 root root 72 Dec 25 16:51 1679 drwxr-xr-x 1 root root 32 Dec 25 17:00 1680 drwxr-xr-x 1 root root 32 Dec 26 13:43 1681 drwxr-xr-x 1 root root 72 Dec 25 17:11 1682 drwxr-xr-x 1 root root 32 Dec 26 01:00 1683 drwxr-xr-x 1 root root 32 Dec 26 13:43 1684 drwxr-xr-x 1 root root 72 Dec 26 13:19 1685 drwxr-xr-x 1 root root 32 Dec 26 13:21 1686 drwxr-xr-x 1 root root 72 Dec 26 13:21 1687 drwxr-xr-x 1 root root 32 Dec 26 13:26 1688 drwxr-xr-x 1 root root 72 Dec 26 13:26 1689 drwxr-xr-x 1 root root 32 Dec 26 13:26 1690 drwxr-xr-x 1 root root 72 Dec 26 13:27 1691 drwxr-xr-x 1 root root 32 Dec 26 14:00 1692 drwxr-xr-x 1 root root 32 Dec 26 14:10 1693 drwxr-xr-x 1 root root 72 Dec 26 14:10 1694 drwxr-xr-x 1 root root 32 Dec 26 14:13 1696 drwxr-xr-x 1 root root 72 Dec 26 14:13 1697 drwxr-xr-x 1 root root 32 Dec 26 20:33 1698 ``` This also happens when I run grub-mkconfig manually. I have installed the inotify-tools optional dependency and disabled the old grub-btrfs.path systemd unit, since it seems to have been replaced with grub-btrfsd from what I can gather.

Until this is fixed, I changed line 295 of 41_snapshots-btrfs on my local system to reference field 12 instead of the missing field 13. This is a good workaround for me. Once btrfs-progs is fixed, I can revert my local change.

Schlaefer · December 29, 2022, 4:39pm

Also affects btrbk: No snapshots or backups for a few days now, which was a “surprise”. Be careful out there.

github.com/digint/btrbk

btrbk broken on btrfs-progs 6.1

opened 10:19AM - 25 Dec 22 UTC

Elkropac

upstream bug

Hi, my Debian system upgraded btrfs-progs from version 6.0.2 to 6.1 and btrbk s…topped working. It says ``` # btrbk list ERROR: Skipping subvolume "/mnt/btrfs/system/system": subvolume has no UUID ERROR: Skipping subvolume "/mnt/btrfs/home/homex": subvolume has no UUID ERROR: Skipping subvolume "/mnt/btrfs/lxc/lxc/DevelBuster": subvolume has no UUID ERROR: Skipping subvolume "/mnt/btrfs/lxc/lxc/DevelStretch": subvolume has no UUID ERROR: Skipping subvolume "/mnt/btrfs/lxc/lxc/PHP": subvolume has no UUID ERROR: Skipping subvolume "/mnt/btrfs/docker/docker/_scripts": subvolume has no UUID ERROR: Skipping subvolume "/mnt/btrfs/docker/docker/gitlab-fresh": subvolume has no UUID ERROR: Skipping subvolume "/mnt/btrfs/docker/docker/kibana": subvolume has no UUID ERROR: Skipping subvolume "/mnt/btrfs/docker/docker/phpdocker": subvolume has no UUID SOURCE_SUBVOLUME SNAPSHOT_SUBVOLUME STATUS TARGET_SUBVOLUME ``` after downgrading back to 6.0.2 it works ok again. My btrbk version is 0.32.5 from Debian unstable

Schlaefer · December 30, 2022, 10:01am

Arch released a patched version 6.1-2.

Things seem to be working as expected again here.

dalto · January 1, 2023, 10:01am

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