zfs: add latestCompatibleLinuxPackages option

[jonringer]

Motivation for this change

It's been brought up that people would like some way to more easily determine the latest compatible version with zfs.

This is a compromise in not being able to do so at all, to being able to determine the latest given all module restrictions. Just add something specifically to zfs itself.

example usage:

  boot.kernelPackages = config.boot.zfs.package.latestCompatibleLinuxPackges;

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS linux)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• 21.11 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.

[happysalada]

This Looks good to me.
Are you waiting for more people to have a look?
I am in favor of merging it.

[hmenke]

I saw people repeatedly asking for this, so a backport is probably a good idea.

[jonringer]

I should probably add a release note, otherwise I think it's merge-able

[Atemu]

Not as general as @xaverdh's solution but a net improvement and definitely not controversial.
Should a more general solution land later, it should be simple to implement this special case with it.

Needs a rebase @jonringer but after that it's ready to merge IMO.

[jansol]

Looks like it's config.boot.zfs.package.latestCompatibleLinuxPackges now.

[jansol]

Can we get this merged? I'd appreciate getting away from using a frankenbuild of unstable/master/PRs soon.

[happysalada]

@jonringer do you need more feedback on this one? Or is there anything that can be done to help?
also looking forward to this PR.

[jonringer]

I'll resolve the conflicts then merge when ofborg is green.

[jonringer]

going to wait for ofborg

[github-actions]

Backport failed for release-21.05, because it was unable to cherry-pick the commit(s).

Please cherry-pick the changes locally.

git fetch origin release-21.05
git worktree add -d .worktree/backport-126980-to-release-21.05 origin/release-21.05
cd .worktree/backport-126980-to-release-21.05
git checkout -b backport-126980-to-release-21.05
ancref=$(git merge-base e8a41956a7a1ffed308d497f456d25bb2d3a5dbe fd7dcd2cf4ada16d40a39856204fc2b8f16a4aed)
git cherry-pick -x $ancref..fd7dcd2cf4ada16d40a39856204fc2b8f16a4aed

[nixos-discourse]

This pull request has been mentioned on NixOS Discourse. There might be relevant details there:

https://discourse.nixos.org/t/package-zfs-kernel-2-0-5-5-14-5-is-marked-as-broken-refusing-to-evaluate/15139/5