nixos/{bcache,lvm}: enable when using systemd in stage 1 initrd

[JohnRTitor]

Description of changes

Fixes #343566

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandboxing enabled in nix.conf? (See Nix manual)
  • sandbox = relaxed
  • sandbox = true
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 24.11 Release Notes (or backporting 23.11 and 24.05 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.

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[ElvishJerricco]

This is part of a slightly bigger change I wanted to make this week. LVM, bcache (not fs), and swraid are all things that work by default in scripted initrd but not systemd initrd. As much as I would prefer for these things to be detected with nixos-generate-config, I think we should just enable them all by default in systemd initrd. We did already do the work to have swraid detected, including stateVersion-based compatibility logic for existing configs, but I think it would be better to just revert that and enable it by default.

It'd be nice to get it all done at once, if you feel comfortable adding those other two things to this PR. If not, I can do it in another PR.

[JohnRTitor]

Sure but I don't think there is boot.initrd.swraid.enable?

bcache is pretty straightforward like this.

[ElvishJerricco]

Yea, swraid is just controlled by boot.swraid.enable.

[JohnRTitor]

Yea, swraid is just controlled by boot.swraid.enable.

Where do I enable this then? It is enabled by default AFAIK.

[JohnRTitor]

I have merged this, swraid fix can be figured out later.

[ElvishJerricco]

It is enabled by default AFAIK

@JohnRTitor No it isn't? It's only enabled by default with a sufficiently old stateVersion.

[JohnRTitor]

@ElvishJerricco Done, opened #348134. I don't use this feature/and don't know how it works, so further action on my part won't be possible.