Hello Ryan, or anyone else affected, Accepted bcache-tools into bionic-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/bcache- tools/1.0.8-2ubuntu0.18.04.1 in a few hours, and then in the -proposed repository.
Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users. If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed- bionic to verification-done-bionic. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification- failed-bionic. In either case, without details of your testing we will not be able to proceed. Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping! N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days. ** Changed in: bcache-tools (Ubuntu Bionic) Status: In Progress => Fix Committed ** Tags added: verification-needed-bionic -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to systemd in Ubuntu. https://bugs.launchpad.net/bugs/1861941 Title: bcache by-uuid links disappear after mounting bcache0 Status in bcache-tools package in Ubuntu: Fix Released Status in systemd package in Ubuntu: Fix Released Status in bcache-tools source package in Bionic: Fix Committed Status in systemd source package in Bionic: Won't Fix Status in bcache-tools source package in Focal: Fix Released Status in systemd source package in Focal: In Progress Bug description: SRU TEAM: The last 2 commits show a summary for the merges/changes I added some specific (to Bionic) notes in the template. Thanks! [Impact] * bcache-tools udev created symlinks might disappear when other udev events are processed for the same devices. * after mkfs.XXX in /dev/bcacheY you might face a condition where /dev/bcache/by-{uuid,label}/zzz symlinks are gone. * /dev/bcache/by-{uuid,label}/ symlinks are important so bcache devices can be addressed by their UUIDs and not the ordering they were assembled (MAAS depends on this feature, for example). * it was also discussed in this bug that systemd-udev should *not* populate /dev/disk/by-uuid/ with symlinks of disks that were bcache backing devices. this was turned into a discussion whether blkid should report those or not, and this discussion "died" after sometime. This last item is what the systemd update is all about: to disallow /dev/disk/by-XXX/yyyy creation for bcache backing devices (a simple change that will reduce end users confusion). [Test Case] * The reproducer script is here: https://paste.ubuntu.com/p/37KGy2Smnp/ * Bionic can't reproduce the issue with the 18.04 kernel, nor with the HWE kernel. Nevertheless, it is preferable that Bionic also do the same thing: to read bcache superblock and feed environment for /dev/bcache/by-{uuid,label} symlinks creation. [Regression Potential] * We are not depending on bcache device udev events any more when creating the /dev/bcache/by-{uuid,label}/ symlinks. Instead, we are depending on a wrapper script that heads bcache device superblock. If there is a bug in this wrapper the symlinks wouldn't work. * Previously we were thinking in asking the kernel team to remove the bcache udev event delta script they've done for previous case (LP: #1729145). It creates the udev events that were being read and filling the symlinks. We decided not to remove those (just from Groovy and on) so we don't need to worry on Breaks/Conflicts in between the kernel package and bcache-tools (and udev)). * Long story short: kernel will continue to emit bcache udev events as it did previously but now those events won't be used by anything - after installing this SRU - because udev wrapper script is doing this job (and doing it properly) [Other Info] - Original Description: 1. root@ubuntu:~# lsb_release -rd Description: Ubuntu Focal Fossa (development branch) Release: 20.04 2. root@ubuntu:~# lsb_release -rd Description: Ubuntu Focal Fossa (development branch) Release: 20.04 root@ubuntu:~# apt-cache policy linux-image-virtual linux-image-virtual: Installed: 5.4.0.12.15 Candidate: 5.4.0.12.15 Version table: *** 5.4.0.12.15 500 500 http://archive.ubuntu.com/ubuntu focal/main amd64 Packages 100 /var/lib/dpkg/status root@ubuntu:~# apt-cache policy linux-image-5.4.0-12-generic linux-image-5.4.0-12-generic: Installed: 5.4.0-12.15 Candidate: 5.4.0-12.15 Version table: *** 5.4.0-12.15 500 500 http://archive.ubuntu.com/ubuntu focal/main amd64 Packages 100 /var/lib/dpkg/status 3. mount /dev/bcache0 && ls -al /dev/bcache/by-uuid/ + ls -al /dev/bcache/by-uuid/ total 0 drwxr-xr-x 2 root root 60 Feb 4 23:31 . drwxr-xr-x 3 root root 60 Feb 4 23:31 .. lrwxrwxrwx 1 root root 13 Feb 4 23:31 abdfd1f6-44ce-4266-91db-24667b9ae51a -> ../../bcache0 4. root@ubuntu:~# ls -al /dev/bcache/by-uuid ls: cannot access '/dev/bcache/by-uuid': No such file or directory ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: linux-image-5.4.0-12-generic 5.4.0-12.15 ProcVersionSignature: Ubuntu 5.4.0-12.15-generic 5.4.8 Uname: Linux 5.4.0-12-generic x86_64 ApportVersion: 2.20.11-0ubuntu16 Architecture: amd64 Date: Tue Feb 4 23:31:52 2020 ProcEnviron: TERM=xterm-256color PATH=(custom, no user) LANG=C.UTF-8 SHELL=/bin/bash SourcePackage: linux-signed-5.4 UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/bcache-tools/+bug/1861941/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
