From a10dfba82d150c2c2fc0f1f9d3457b722728b00e Mon Sep 17 00:00:00 2001
From: Kabbone <tobias@opel-online.de>
Date: Fri, 22 Sep 2023 19:22:19 +0200
Subject: [PATCH] desktop: no more tmpfs and add swap

---
 hosts/desktop/hardware-configuration.nix | 11 +++++++++--
 hosts/fix-nfs4-kernel.nix                | 17 +++++++++++++++++
 2 files changed, 26 insertions(+), 2 deletions(-)
 create mode 100644 hosts/fix-nfs4-kernel.nix

diff --git a/hosts/desktop/hardware-configuration.nix b/hosts/desktop/hardware-configuration.nix
index b935329..ecf4b2d 100644
--- a/hosts/desktop/hardware-configuration.nix
+++ b/hosts/desktop/hardware-configuration.nix
@@ -21,7 +21,8 @@
   boot.initrd.kernelModules = [ "vfio_pci" "vfio" "vfio_iommu_type1" ];
   boot.kernelModules = [ "kvm-amd" ];
   boot.extraModulePackages = [ ];
-  boot.tmp.useTmpfs = true;
+  boot.tmp.useTmpfs = false;
+  boot.tmp.cleanOnBoot = true;
   zramSwap.enable = true;
 
   services.btrfs.autoScrub = {
@@ -82,6 +83,12 @@
       options = [ "compress=zstd,space_cache=v2,ssd,noatime,subvol=@nix,discard=async" ];
     };
 
+  fileSystems."/swap" =
+    { device = "/dev/disk/by-label/NIXROOT";
+      fsType = "btrfs";
+      options = [ "compress=zstd,space_cache=v2,ssd,noatime,subvol=@swap,discard=async" ];
+    };
+
   fileSystems."/mnt/snapshots/root" =
     { device = "/dev/disk/by-label/NIXROOT";
       fsType = "btrfs";
@@ -106,7 +113,7 @@
     };
 
 
-  swapDevices = [ ];
+  swapDevices = [ { device = "/swap/swapfile"; } ];
   
   networking = {
     vswitches = {
diff --git a/hosts/fix-nfs4-kernel.nix b/hosts/fix-nfs4-kernel.nix
new file mode 100644
index 0000000..8deb952
--- /dev/null
+++ b/hosts/fix-nfs4-kernel.nix
@@ -0,0 +1,17 @@
+{ lib, config, pkgs, ... }:
+
+# NFSv4 fix for 6.5.3 and 6.1.53, remove asap
+let
+  version = config.boot.kernelPackages.kernel.version;
+  badVersions = [ "6.5.3" "6.1.53" ];
+in
+
+lib.mkIf (lib.any (v: v == version) badVersions) {
+  boot.kernelPatches = [{
+    name = "nfs4-patch";
+    patch = pkgs.fetchpatch {
+      url = "https://patchwork.kernel.org/project/selinux/patch/20230911142358.883728-1-omosnace@redhat.com/raw/";
+      hash = "sha256-m947t39xr4VqJBZ2mYTFq9Up/NWlwueH8aXFZRQwA7c=";
+    };
+  }];
+}