This bug is awaiting verification that the linux-raspi/6.5.0-1014.17
kernel in -proposed solves the problem. Please test the kernel and
update this bug with the results. If the problem is solved, change the
tag 'verification-needed-mantic-linux-raspi' to 'verification-done-
mantic-linux-raspi'. If the problem still exists, change the tag
'verification-needed-mantic-linux-raspi' to 'verification-failed-mantic-
linux-raspi'.


If verification is not done by 5 working days from today, this fix will
be dropped from the source code, and this bug will be closed.


See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how
to enable and use -proposed. Thank you!


** Tags added: kernel-spammed-mantic-linux-raspi-v2 
verification-needed-mantic-linux-raspi

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https://bugs.launchpad.net/bugs/2054809

Title:
  linux: please move erofs.ko (CONFIG_EROFS for EROFS support) from
  linux-modules-extra to linux-modules

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Jammy:
  Fix Released
Status in linux source package in Mantic:
  Fix Released
Status in linux source package in Noble:
  Fix Released

Bug description:
  SRU Justification

  [Impact]

  The erofs.ko module (CONFIG_EROFS) is currently shipped in linux-
  modules-extra. This makes it hard to pull in via the linux-virtual
  package, it can only come from the linux-generic one that also pulls
  in the firmware and everything else needed for baremetal, and that
  serves no purpose in a qemu VM. This stops VMs using these kernels
  from using the erofs filesystem. Erofs is a modern alternative to
  squashfs that supports more features such as ACLs. The following LPC
  presentation has more details on erofs and its advantages over
  squashfs: https://youtu.be/jt-hp_LtSBc.

  A user launching a VM using the linux-virtual kernel image is not able
  to mount erofs filesystems due to the lack of this kconfig. We make
  extensive use of erofs in systemd's upstream CI, which is running on
  Github Actions, which uses Jammy, so it would be great to have this
  backported.

  [Fix]

  Please consider moving this module to linux-modules.

  These are already enabled in the 'main' kernel config, and in other
  distros. In Debian/Archlinux/Fedora it is a (core) module that is
  built by default.

  To verify this works, it is sufficient to create an erofs filesystem
  with mkfs.erofs and verify that it can be mounted:

  $ mkdir sources
  $ echo abcde > sources/file
  $ mkfs.erofs erofs sources
  $ mount erofs mnt --mkdir
  $ ls mnt
  file

  Without this module installed and loaded, the mount will fail. Once
  enabled, it will succeed.

  [Test]

  1. pull built linux-modules packages for architectures with do_extras_package
     set to true;
  2. extract the deb and check if erofs kernel module file exists:

     $ dpkg-deb -R linux-modules-*.deb .
     $ find . -name erofs.ko\*

  [Regression Potential]

  Moving a module from a less-common to a more-common package should not
  have any negative side effects. The main effect will be a little more
  disk space used by the more common package, whether the module is in
  use or not. There will also be more functionality available in the
  default installation, which means a slightly increased surface and
  possibility of new bugs in case it gets used.

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