bogus nilfs2 partition detection breaks /dev/disk/by-partuuid creation

[Matthew Vernon]

When my system booted, it failed to create a /dev/disk/by-partuuid link for one partition (/dev/nvme0n1p11) that means that ceph is unable to start up (the relevant osd looks for /var/lib/ceph/osd/ceph-388/journal which is a symlink to /dev/disk/by-partuuid/d2ace848-7e2d-4395-a195-a4428631b333 which doesn't exist). See the shell outputs below:

root@sto-3-3:~# file /var/lib/ceph/osd/ceph-388/journal
/var/lib/ceph/osd/ceph-388/journal: broken symbolic link to /dev/disk/by-partuuid/d2ace848-7e2d-4395-a195-a4428631b333
root@sto-3-3:~# blkid /dev/nvme0n1p11
/dev/nvme0n1p11: PARTLABEL="ceph journal" PARTUUID="d2ace848-7e2d-4395-a195-a4428631b333"
root@sto-3-3:~# udevadm info /dev/nvme0n1p11
P: /devices/pci0000:00/0000:00:02.0/0000:02:00.0/nvme/nvme0/nvme0n1/nvme0n1p11
N: nvme0n1p11
E: DEVNAME=/dev/nvme0n1p11
E: DEVPATH=/devices/pci0000:00/0000:00:02.0/0000:02:00.0/nvme/nvme0/nvme0n1/nvme0n1p11
E: DEVTYPE=partition
E: ID_PART_TABLE_TYPE=gpt
E: ID_PART_TABLE_UUID=8c11f541-fdc1-4299-923b-dc57d8a38619
E: MAJOR=259
E: MINOR=11
E: SUBSYSTEM=block
E: TAGS=:systemd:
E: USEC_INITIALIZED=7070417

root@sto-3-3:~# grep nvme0n1p11 /var/log/syslog
Jan 4 09:17:20 sto-3-3 systemd-udevd[106928]: incorrect nilfs2 checksum on /dev/nvme0n1p11

...so the bogus nilfs2 checksum failure is causing udev to not create the ID_PART_ENTRY_UUID and similar entries (and hence the /dev/disk/by-partuuid link) and is breaking my ceph setup.

I think this is related to this upstream issue: https://github.com/karelzak/util-linux/issues/361

...this is quite a serious bug, as it's causing unrelated software (ceph) to break.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: util-linux 2.27.1-6ubuntu3.1
ProcVersionSignature: Ubuntu 4.4.0-47.68-generic 4.4.24
Uname: Linux 4.4.0-47-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.4
Architecture: amd64
Date: Wed Jan 4 10:19:19 2017
InstallationDate: Installed on 2016-11-01 (63 days ago)
InstallationMedia: Ubuntu-Server 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
SourcePackage: util-linux
UpgradeStatus: No upgrade log present (probably fresh install)

[Konstantin Khlebnikov (koct9i)]

udev use builtin blkid so this is bug in systemd:

https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1820874