shared virtio fs

capibara.nix

@@ -61,6 +61,14 @@ in {
       fsType = "btrfs";
       options = [ "subvol=swap" ];
     };
+
+    "/mnt/vfs_share" = {
+      device = "/dev/mapper/root";
+      fsType = "btrfs";
+      options = [ "subvol=vfs_share" "compress=zstd" ];
+      neededForBoot = true;
+    };
+
   };
 
   environment.variables = {

home/nixos-common.nix

@@ -61,6 +61,11 @@
       allowOther = true;
     };
 
+    "/mnt/vfs_share/${config.home.homeDirectory}" = {
+      directories = [ "vfs_share" ];
+      allowOther = true;
+    };
+
     "/persist/${config.home.homeDirectory}" = {
       directories = [
         ".Slic3r"
@@ -131,6 +136,7 @@
   home.packages = with pkgs; [
     # calibre
     R
+    virtiofsd
     acpi
     android-tools
     ansible