Add CachyOS-patched ZFS module

.github/workflows/auto-update.yml

@@ -58,10 +58,15 @@ jobs:
           sudo systemctl restart nix-daemon
 
       - name: Build nix packages
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
           export TMPDIR=/nix/tmpdir
           nix flake update
 
+          chmod +x zfs-cachyos/update.py
+          zfs-cachyos/update.py
+
       - env:
           API_TOKEN_GITHUB: ${{ secrets.AUTOMERGE_TOKEN }}
         run: |

.gitignore

@@ -9,3 +9,181 @@ trace.txt*
 update-git-commits.txt
 *.cmp
 *.fetchlog
+
+# Created by https://www.toptal.com/developers/gitignore/api/python
+# Edit at https://www.toptal.com/developers/gitignore?templates=python
+
+### Python ###
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+cover/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+.pybuilder/
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+#   For a library or package, you might want to ignore these files since the code is
+#   intended to run in multiple environments; otherwise, check them in:
+# .python-version
+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
+#   having no cross-platform support, pipenv may install dependencies that don't work, or not
+#   install all needed dependencies.
+#Pipfile.lock
+
+# poetry
+#   Similar to Pipfile.lock, it is generally recommended to include poetry.lock in version control.
+#   This is especially recommended for binary packages to ensure reproducibility, and is more
+#   commonly ignored for libraries.
+#   https://python-poetry.org/docs/basic-usage/#commit-your-poetrylock-file-to-version-control
+#poetry.lock
+
+# pdm
+#   Similar to Pipfile.lock, it is generally recommended to include pdm.lock in version control.
+#pdm.lock
+#   pdm stores project-wide configurations in .pdm.toml, but it is recommended to not include it
+#   in version control.
+#   https://pdm.fming.dev/#use-with-ide
+.pdm.toml
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow and github.com/pdm-project/pdm
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+# pytype static type analyzer
+.pytype/
+
+# Cython debug symbols
+cython_debug/
+
+# PyCharm
+#  JetBrains specific template is maintained in a separate JetBrains.gitignore that can
+#  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
+#  and can be added to the global gitignore or merged into this file.  For a more nuclear
+#  option (not recommended) you can uncomment the following to ignore the entire idea folder.
+#.idea/
+
+### Python Patch ###
+# Poetry local configuration file - https://python-poetry.org/docs/configuration/#local-configuration
+poetry.toml
+
+# ruff
+.ruff_cache/
+
+# LSP config files
+pyrightconfig.json
+
+# End of https://www.toptal.com/developers/gitignore/api/python
+

README.md

@@ -1,6 +1,6 @@
 # Nix packages for CachyOS Kernel
 
-This repo contains Linux kernels with both [CachyOS patches](https://github.com/CachyOS/kernel-patches) and [CachyOS tunings](https://github.com/CachyOS/linux-cachyos).
+This repo contains Linux kernels with both [CachyOS patches](https://github.com/CachyOS/kernel-patches) and [CachyOS tunings](https://github.com/CachyOS/linux-cachyos), as well as [CachyOS-patched ZFS module](https://github.com/CachyOS/zfs).
 
 ## Which kernel versions are provided?
 
@@ -29,7 +29,7 @@ For each linux kernel entry under `packages`, we have a corresponding `linuxPack
 - `linux-cachyos-latest` -> `inputs.nix-cachyos-kernel.legacyPackages.x86_64-linux.linuxPackages-cachyos-latest`
 - `linux-cachyos-lts-lto` -> `inputs.nix-cachyos-kernel.legacyPackages.x86_64-linux.linuxPackages-cachyos-lts-lto`
 
-## How to use
+## How to use kernels
 
 Add this repo to the inputs section of your `flake.nix`:
 
@@ -64,3 +64,59 @@ Then specify `pkgs.cachyosKernels.linuxPackages-cachyos-latest` (or other varian
   };
 }
 ```
+
+## How to use ZFS modules
+
+> Note: CachyOS-patched ZFS module may fail to compile from time to time. Most compilation failures are caused by incompatibilities between kernel and ZFS. Please check [ZFS upstream issues](https://github.com/openzfs/zfs/issues) for any compatibility reports, and try switching between `zfs_2_3`, `zfs_unstable` and `zfs_cachyos`.
+
+To use ZFS module with `linuxPackages-cachyos-*` provided by this flake, point `boot.zfs.package` to `config.boot.kernelPackages.zfs_cachyos`.
+
+```nix
+{
+  nixosConfigurations.example = inputs.nixpkgs.lib.nixosSystem {
+    system = "x86_64-linux";
+    modules = [
+      (
+        { pkgs, ... }:
+        {
+          nixpkgs.overlays = [ self.overlay ];
+          boot.kernelPackages = pkgs.cachyosKernels.linuxPackages-cachyos-latest;
+
+          # ZFS config
+          boot.supportedFilesystems.zfs = true;
+          boot.zfs.package = config.boot.kernelPackages.zfs_cachyos;
+
+          # ... your other configs
+        }
+      )
+    ];
+  };
+}
+```
+
+If you want to construct your own `linuxPackages` attrset with `linuxKernel.packagesFor (path to your kernel)`, you can directly reference the `zfs-cachyos` attribute in this flake's `packages` / `legayPackages` output, or the `cachyosKernels` overlay:
+
+```nix
+{
+  nixosConfigurations.example = inputs.nixpkgs.lib.nixosSystem {
+    system = "x86_64-linux";
+    modules = [
+      (
+        { pkgs, ... }:
+        {
+          nixpkgs.overlays = [ self.overlay ];
+          boot.kernelPackages = pkgs.cachyosKernels.linuxPackages-cachyos-latest;
+
+          # ZFS config
+          boot.supportedFilesystems.zfs = true;
+          boot.zfs.package = pkgs.cachyosKernels.zfs-cachyos.override {
+            kernel = config.boot.kernelPackages.kernel;
+          };
+
+          # ... your other configs
+        }
+      )
+    ];
+  };
+}
+```

flake.nix

@@ -23,14 +23,24 @@
       let
         loadPackages =
           pkgs:
-          lib.removeAttrs
+          let
-            (pkgs.callPackage ./kernel-cachyos {
+            kernels =
+              lib.removeAttrs
+                (pkgs.callPackage ./kernel-cachyos {
+                  inherit inputs;
+                })
+                [
+                  "override"
+                  "overrideDerivation"
+                ];
+          in
+          kernels
+          // {
+            zfs-cachyos = pkgs.callPackage ./zfs-cachyos {
               inherit inputs;
-            })
+              kernel = kernels.linux-cachyos-latest;
-            [
+            };
-              "override"
+          };
-              "overrideDerivation"
-            ];
       in
       rec {
         systems = [
@@ -57,17 +67,23 @@
             cachyosKernels = loadPackages prev;
           };
 
+          # Example configurations for testing CachyOS kernel
           nixosConfigurations = lib.genAttrs systems (
             system:
             inputs.nixpkgs.lib.nixosSystem {
               inherit system;
               modules = [
                 (
-                  { pkgs, ... }:
+                  { pkgs, config, ... }:
                   {
                     nixpkgs.overlays = [ self.overlay ];
                     boot.kernelPackages = pkgs.cachyosKernels.linuxPackages-cachyos-latest;
 
+                    # ZFS test
+                    boot.supportedFilesystems.zfs = true;
+                    boot.zfs.package = config.boot.kernelPackages.zfs_cachyos;
+                    networking.hostId = "12345678";
+
                     # Minimal config to make test configuration build
                     boot.loader.grub.devices = [ "/dev/vda" ];
                     fileSystems."/" = {

kernel-cachyos/mkCachyKernel.nix

@@ -77,10 +77,21 @@ let
       description = "Linux CachyOS Kernel" + lib.optionalString lto " with Clang+ThinLTO";
     };
   };
+
+  zfsPackage = callPackage ../zfs-cachyos {
+    inherit inputs;
+    kernel = kernelPackage;
+  };
 in
 [
   (lib.nameValuePair "linux-cachyos-${pnameSuffix}" kernelPackage)
   (lib.nameValuePair "linuxPackages-cachyos-${pnameSuffix}" (
-    kernelModuleLLVMOverride (linuxKernel.packagesFor kernelPackage)
+    kernelModuleLLVMOverride (
+      (linuxKernel.packagesFor kernelPackage).extend (
+        final: prev: {
+          zfs_cachyos = zfsPackage;
+        }
+      )
+    )
   ))
 ]

zfs-cachyos/default.nix

@@ -0,0 +1,35 @@
+{
+  inputs,
+  callPackage,
+  kernel ? null,
+  lib,
+  fetchFromGitHub,
+}:
+let
+  versionJson = lib.importJSON ./version.json;
+  zfsGeneric = callPackage "${inputs.nixpkgs.outPath}/pkgs/os-specific/linux/zfs/generic.nix" {
+    inherit kernel;
+  };
+in
+# https://github.com/chaotic-cx/nyx/blob/aacb796ccd42be1555196c20013b9b674b71df75/pkgs/linux-cachyos/packages-for.nix#L99
+(zfsGeneric {
+  kernelModuleAttribute = "zfs_cachyos";
+  kernelMinSupportedMajorMinor = "1.0";
+  kernelMaxSupportedMajorMinor = "99.99";
+  enableUnsupportedExperimentalKernel = true;
+  version = builtins.elemAt (lib.splitString "-" versionJson.zfs_branch) 1;
+  tests = { };
+  maintainers = with lib.maintainers; [
+    pedrohlc
+  ];
+  hash = "";
+  extraPatches = [ ];
+}).overrideAttrs
+  (prevAttrs: {
+    src = fetchFromGitHub {
+      owner = "cachyos";
+      repo = "zfs";
+      inherit (versionJson) rev hash;
+    };
+    postPatch = builtins.replaceStrings [ "grep --quiet '^Linux-M" ] [ "# " ] prevAttrs.postPatch;
+  })

zfs-cachyos/update.py

@@ -0,0 +1,112 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -i python3 -p python3 -p python3Packages.requests -p nix-prefetch-git
+
+import json
+import os
+import re
+import subprocess
+import sys
+from pathlib import Path
+from typing import Dict, Any, Optional
+
+import requests
+
+
+def get_latest_zfs_cachyos_branch() -> Optional[str]:
+    api_url = "https://api.github.com/repos/CachyOS/zfs/branches"
+    all_branches = []
+    page = 1
+    per_page = 100  # Maximum allowed
+
+    # Setup headers for GitHub API authentication if token is available
+    headers = {}
+    github_token = os.environ.get("GITHUB_TOKEN")
+    if github_token:
+        headers["Authorization"] = f"token {github_token}"
+
+    while True:
+        params = {"per_page": per_page, "page": page}
+        response = requests.get(api_url, params=params, headers=headers, timeout=30)
+        response.raise_for_status()
+
+        branches = response.json()
+        if not branches:
+            break
+
+        all_branches.extend(branches)
+        page += 1
+
+        # If we got less than per_page results, we're on the last page
+        if len(branches) < per_page:
+            break
+
+    cachyos_branches = []
+
+    branch_pattern = re.compile(r"^zfs-\d+\.\d+\.\d+-cachyos$")
+
+    for branch in all_branches:
+        branch_name = branch.get("name", "")
+        if branch_pattern.match(branch_name):
+            cachyos_branches.append(branch_name)
+
+    if not cachyos_branches:
+        print("No branch found matching zfs-x.y.z-cachyos or x.y.z-cachyos pattern")
+        return None
+
+    cachyos_branches.sort(reverse=True)
+    latest_branch = cachyos_branches[0]
+    print(f"Found latest branch: {latest_branch}")
+    return latest_branch
+
+
+def run_nix_prefetch_git(branch: str) -> Optional[Dict[str, Any]]:
+    cmd = ["nix-prefetch-git", "https://github.com/CachyOS/zfs.git", "--branch-name", branch]
+
+    print(f"Running command: {' '.join(cmd)}")
+    result = subprocess.run(cmd, capture_output=True, text=True, timeout=300)
+
+    if result.returncode != 0:
+        print(f"nix-prefetch-git command failed with return code: {result.returncode}")
+        print(f"Error output: {result.stderr}")
+        return None
+
+    output = result.stdout.strip()
+    if not output:
+        print("nix-prefetch-git output is empty")
+        return None
+
+    parsed_output = json.loads(output)
+    return parsed_output
+
+
+def save_version_info(branch: str, prefetch_data: Dict[str, Any], output_file: Path):
+    with open(output_file, "w", encoding="utf-8") as f:
+        json.dump({"zfs_branch": branch, **prefetch_data}, f, indent=2)
+
+    print(f"Version info saved to: {output_file}")
+
+
+def main() -> int:
+    print("Starting ZFS CachyOS version update...")
+
+    latest_branch = get_latest_zfs_cachyos_branch()
+    if not latest_branch:
+        print("Failed to get latest branch, exiting")
+        return 1
+
+    prefetch_data = run_nix_prefetch_git(latest_branch)
+    if not prefetch_data:
+        print("nix-prefetch-git execution failed, exiting")
+        return 1
+
+    script_dir = Path(__file__).parent
+    output_file = script_dir / "version.json"
+
+    save_version_info(latest_branch, prefetch_data, output_file)
+
+    print("ZFS CachyOS version info update completed!")
+    return 0
+
+
+if __name__ == "__main__":
+    sys.exit(main())

zfs-cachyos/version.json

@@ -0,0 +1,15 @@
+{
+  "zfs_branch": "zfs-2.3.6-cachyos",
+  "url": "https://github.com/CachyOS/zfs.git",
+  "rev": "4ddaf45ba468c6953a4fcdbfe79795f74fa6e489",
+  "date": "2025-03-13T10:35:31-04:00",
+  "path": "/nix/store/clbq55q8pca9im5jsr28g472x0l0y50w-zfs",
+  "sha256": "07gh7x7lwq013ni4jb6vxavhf348g8zl3db65sz408lsp2bpx0v5",
+  "hash": "sha256-ZYN+l7iaIkC+Lma1QT96iAwHt+rbLEmiHQFgTk8/8B0=",
+  "fetchLFS": false,
+  "fetchSubmodules": false,
+  "deepClone": false,
+  "fetchTags": false,
+  "leaveDotGit": false,
+  "rootDir": ""
+}