[Bug 1804603] Re: systemd-tmpfiles-setup.service fails on btrfs

[Dimitri John Ledkov]

all updates are out. there no more further updates planned for this issue.
if you have any issues on your systems, you need to debug what's wrong and open a new bug report, attaching systemd-journal details from a broken boot.
most likely something is wrong with your system, forexample unsafe ownership, unsafe permissions, broken host kernel etc.
on all up to date ubuntu systems, installed using ubuntu installers, with latest ubuntu kernel there are no issues at all.
please open a new bug report, if you have issues with your systems.

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Title:
  systemd-tmpfiles-setup.service fails on btrfs

Status in systemd package in Ubuntu:
  Fix Released
Status in systemd source package in Bionic:
  Fix Released
Status in systemd source package in Cosmic:
  Fix Released
Status in systemd source package in Disco:
  Fix Released

Bug description:
  [Impact]

   * Last security update introduced a regression on btrfs based systems, causing systemd-tmpfiles-setup.service to fail to start, resulting in degraded machines.
   * Cherrypick upstream fixes to resolve this.

  [Test Case]

   * Install VM using btrfs for /
   * Boot, check that systemd-tmpfiles-setup.service is started successfully with:
  $ systemctl status systemd-tmpfiles-setup.service

  [Regression Potential]

   * btrfs fd doesn't support the set of flags that systemd used, with
  this patch, a compat set of flags is set instead, thus resolving the
  introduced regression. The worst case scenario is that creating
  subvolumes/directories is still broken (as in, the current status
  quo).

  [Other Info]
   
   * Example bad output

  
  After update to systemd 237-3ubuntu10.9 systemd-tmpfiles-setup.service fails with:

  Nov 21 13:44:12 node-blc49 systemd[1]: Starting Create Volatile Files and Directories...
  Nov 21 13:44:12 node-blc49 systemd-tmpfiles[1226]: Failed to create directory or subvolume "/var": Bad file descriptor
  Nov 21 13:44:12 node-blc49 systemd-tmpfiles[1226]: Failed to create directory or subvolume "/home": Bad file descriptor
  Nov 21 13:44:12 node-blc49 systemd-tmpfiles[1226]: Failed to create directory or subvolume "/srv": Bad file descriptor
  Nov 21 13:44:12 node-blc49 systemd[1]: systemd-tmpfiles-setup.service: Main process exited, code=exited, status=1/FAILURE
  Nov 21 13:44:12 node-blc49 systemd[1]: systemd-tmpfiles-setup.service: Failed with result 'exit-code'.
  Nov 21 13:44:12 node-blc49 systemd[1]: Failed to start Create Volatile Files and Directories.

  This happens on btrfs root filesystems in real hardware and on our
  virtualized servers as well. 237-3ubuntu10.6 didnt show this errors
  and going back to 237-3ubuntu10 removes them as well.

  # lsb_release -rd
  Description:    Ubuntu 18.04.1 LTS
  Release:        18.04

  # apt-cache policy systemd
  systemd:
    Installiert:           237-3ubuntu10.9
    Installationskandidat: 237-3ubuntu10.9
    Versionstabelle:
   *** 237-3ubuntu10.9 500
          500 http://de.archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages
          500 http://security.ubuntu.com/ubuntu bionic-security/main amd64 Packages
          100 /var/lib/dpkg/status
       237-3ubuntu10 500
          500 http://de.archive.ubuntu.com/ubuntu bionic/main amd64 Packages

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