zfs: dynamically determine latestCompatibleLinuxPackages (#337933)

pkgs/os-specific/linux/kernel/generic.nix

@@ -230,6 +230,7 @@ kernel.overrideAttrs (finalAttrs: previousAttrs: {
   passthru = previousAttrs.passthru or { } // basicArgs // {
     features = kernelFeatures;
     inherit commonStructuredConfig structuredExtraConfig extraMakeFlags isZen isHardened isLibre;
+    isVanilla = !(isHardened || isLibre || isZen);
     isXen = lib.warn "The isXen attribute is deprecated. All Nixpkgs kernels that support it now have Xen enabled." true;
 
     # Adds dependencies needed to edit the config:

pkgs/os-specific/linux/zfs/2_1.nix

@@ -1,7 +1,6 @@
 { callPackage
 , kernel ? null
 , stdenv
-, linuxKernel
 , lib
 , nixosTests
 , ...
@@ -15,9 +14,7 @@ callPackage ./generic.nix args {
   # this attribute is the correct one for this package.
   kernelModuleAttribute = "zfs_2_1";
   # check the release notes for compatible kernels
-  kernelCompatible = kernel.kernelOlder "6.8";
-
-  latestCompatibleLinuxPackages = linuxKernel.packages.linux_6_6;
+  kernelCompatible = kernel: kernel.kernelOlder "6.8";
 
   # This is a fixed version to the 2.1.x series, move only
   # if the 2.1.x series moves.

pkgs/os-specific/linux/zfs/2_2.nix

@@ -2,7 +2,6 @@
 , kernel ? null
 , stdenv
 , lib
-, linuxKernel
 , nixosTests
 , ...
 } @ args:
@@ -15,9 +14,7 @@ callPackage ./generic.nix args {
   # this attribute is the correct one for this package.
   kernelModuleAttribute = "zfs_2_2";
   # check the release notes for compatible kernels
-  kernelCompatible = kernel.kernelOlder "6.10";
-
-  latestCompatibleLinuxPackages = linuxKernel.packages.linux_6_6;
+  kernelCompatible = kernel: kernel.kernelOlder "6.10";
 
   # this package should point to the latest release.
   version = "2.2.5";

pkgs/os-specific/linux/zfs/generic.nix

@@ -2,6 +2,7 @@ let
   genericBuild =
   { pkgs, lib, stdenv, fetchFromGitHub
   , autoreconfHook269, util-linux, nukeReferences, coreutils
+  , linuxKernel
   , perl
   , configFile ? "all"
 
@@ -27,8 +28,6 @@ let
   , kernelModuleAttribute
   , extraPatches ? []
   , rev ? "zfs-${version}"
-  , isUnstable ? false
-  , latestCompatibleLinuxPackages
   , kernelCompatible ? null
   , maintainers ? (with lib.maintainers; [ amarshall ])
   , tests
@@ -199,7 +198,13 @@ let
     outputs = [ "out" ] ++ optionals buildUser [ "dev" ];
 
     passthru = {
-      inherit enableMail latestCompatibleLinuxPackages kernelModuleAttribute;
+      inherit enableMail kernelModuleAttribute;
+      latestCompatibleLinuxPackages = lib.pipe linuxKernel.packages [
+        builtins.attrValues
+        (builtins.filter (kPkgs: (builtins.tryEval kPkgs).success && kPkgs ? kernel && kPkgs.kernel.passthru.isVanilla && kernelCompatible kPkgs.kernel))
+        (builtins.sort (a: b: (lib.versionOlder a.kernel.version b.kernel.version)))
+        lib.last
+      ];
       # The corresponding userspace tools to this instantiation
       # of the ZFS package set.
       userspaceTools = genericBuild (outerArgs // {
@@ -236,7 +241,7 @@ let
       mainProgram = "zfs";
       # If your Linux kernel version is not yet supported by zfs, try zfs_unstable.
       # On NixOS set the option `boot.zfs.package = pkgs.zfs_unstable`.
-      broken = buildKernel && (kernelCompatible != null) && !kernelCompatible;
+      broken = buildKernel && (kernelCompatible != null) && !(kernelCompatible kernel);
     };
   };
 in

pkgs/os-specific/linux/zfs/unstable.nix

@@ -1,7 +1,6 @@
 { callPackage
 , kernel ? null
 , stdenv
-, linuxKernel
 , nixosTests
 , fetchpatch
 , ...
@@ -15,9 +14,7 @@ callPackage ./generic.nix args {
   # this attribute is the correct one for this package.
   kernelModuleAttribute = "zfs_unstable";
   # check the release notes for compatible kernels
-  kernelCompatible = kernel.kernelOlder "6.11";
-
-  latestCompatibleLinuxPackages = linuxKernel.packages.linux_6_10;
+  kernelCompatible = kernel: kernel.kernelOlder "6.11";
 
   # this package should point to a version / git revision compatible with the latest kernel release
   # IMPORTANT: Always use a tagged release candidate or commits from the
@@ -26,7 +23,6 @@ callPackage ./generic.nix args {
   version = "2.2.5";
   # rev = "";
 
-  isUnstable = true;
   tests = [
     nixosTests.zfs.unstable
   ];