[Bug 2067907] Re: systemd tools fail to mount disk images with btrfs filesystems

[Daan De Meyer]

** Description changed:

  SRU Justification
  
  [Impact]
  
- In Ubuntu Noble, systemd tools fail to mount images with btrfs
+ In Ubuntu Noble, systemd-repart fail to mount images with btrfs
  filesystems in them. This is because the kernel removed the "norecovery"
- mount option which systemd tools add in some scenarios when mounting
- filesystems from disk images.
+ mount option which systemd-repart adds in when mounting filesystems from
+ disk images.
  
  Commit which removed "norecovery" in the kernel:
  https://github.com/torvalds/linux/commit/a1912f712188291f9d7d434fba155461f1ebef66.
  
  [Fix]
  
- 
- The issue was worked around upstream in systemd in https://github.com/systemd/systemd/pull/32892 and https://github.com/systemd/systemd/pull/32948.
+ The issue was worked around upstream in systemd in
+ https://github.com/systemd/systemd/pull/32892 and
+ https://github.com/systemd/systemd/pull/32948.
  
  [Test]
  
  To reproduce:
  
  git clone https://github.com/systemd/mkosi
  cd mkosi
  bin/mkosi -d fedora -t disk --tools-tree=default -f
- sudo systemd-dissect -M mkosi.output/image.raw abc
- 
- The last command will fail with "Failed to mount image: Invalid
- argument". After backporting the two systemd commits, the last command
- will succeed.
+ sudo systemd-repart --image mkosi.output/image.raw
+ The last command will fail with "Failed to mount image: Invalid argument". After backporting the two systemd commits, the last command will succeed.
  
  [Regression Potential]
  
  Low, the systemd commits only change behavior for btrfs filesystems,
  which are currently not working at all. The commits have been backported
  to the systemd stable releases and we've had no reports of any issues
  caused by backporting these commits.

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https://bugs.launchpad.net/bugs/2067907

Title:
  systemd tools fail to mount disk images with btrfs filesystems

Status in systemd package in Ubuntu:
  New

Bug description:
  SRU Justification

  [Impact]

  In Ubuntu Noble, systemd-repart fail to mount images with btrfs
  filesystems in them. This is because the kernel removed the
  "norecovery" mount option which systemd-repart adds in when mounting
  filesystems from disk images.

  Commit which removed "norecovery" in the kernel:
  https://github.com/torvalds/linux/commit/a1912f712188291f9d7d434fba155461f1ebef66.

  [Fix]

  The issue was worked around upstream in systemd in
  https://github.com/systemd/systemd/pull/32892 and
  https://github.com/systemd/systemd/pull/32948.

  [Test]

  To reproduce:

  git clone https://github.com/systemd/mkosi
  cd mkosi
  bin/mkosi -d fedora -t disk --tools-tree=default -f
  sudo systemd-repart --image mkosi.output/image.raw
  The last command will fail with "Failed to mount image: Invalid argument". After backporting the two systemd commits, the last command will succeed.

  [Regression Potential]

  Low, the systemd commits only change behavior for btrfs filesystems,
  which are currently not working at all. The commits have been
  backported to the systemd stable releases and we've had no reports of
  any issues caused by backporting these commits.

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