nixos: f2fs filesystem module support (close #2085)

nixos/modules/module-list.nix

@@ -306,6 +306,7 @@
   ./tasks/filesystems.nix
   ./tasks/filesystems/btrfs.nix
   ./tasks/filesystems/ext.nix
+  ./tasks/filesystems/f2fs.nix
   ./tasks/filesystems/nfs.nix
   ./tasks/filesystems/reiserfs.nix
   ./tasks/filesystems/unionfs-fuse.nix

nixos/modules/profiles/base.nix

@@ -34,6 +34,7 @@
     pkgs.dosfstools
     pkgs.xfsprogs
     pkgs.jfsutils
+    pkgs.f2fs-tools
     #pkgs.jfsrec # disabled because of Boost dependency
 
     # Some compression/archiver tools.
@@ -50,6 +51,6 @@
   ];
 
   # Include support for various filesystems.
-  boot.supportedFilesystems = [ "btrfs" "reiserfs" "vfat" ];
+  boot.supportedFilesystems = [ "btrfs" "reiserfs" "vfat" "f2fs" ];
 
 }

nixos/modules/system/boot/stage-1-init.sh

@@ -204,7 +204,7 @@ checkFS() {
     # does (minutes versus seconds).
     if test -z "@checkJournalingFS@" -a \
         \( "$fsType" = ext3 -o "$fsType" = ext4 -o "$fsType" = reiserfs \
-        -o "$fsType" = xfs -o "$fsType" = jfs \)
+        -o "$fsType" = xfs -o "$fsType" = jfs -o "$fsType" = f2fs \)
     then
         return 0
     fi

nixos/modules/tasks/filesystems/f2fs.nix

@@ -0,0 +1,21 @@
+{ config, pkgs, ... }:
+
+with pkgs.lib;
+
+let
+  inInitrd = any (fs: fs == "f2fs") config.boot.initrd.supportedFilesystems;
+in
+{
+  config = mkIf (any (fs: fs == "f2fs") config.boot.supportedFilesystems) {
+
+    system.fsPackages = [ pkgs.f2fs-tools ];
+
+    boot.initrd.availableKernelModules = mkIf inInitrd [ "f2fs" ];
+
+    boot.initrd.extraUtilsCommands = mkIf inInitrd ''
+      mkdir -p $out/bin $out/lib
+      cp -v   ${pkgs.f2fs-tools}/sbin/fsck.f2fs $out/bin
+      cp -pdv ${pkgs.f2fs-tools}/lib/lib*.so.* $out/lib
+    '';
+  };
+}

nixos/tests/partition.nix

@@ -24,6 +24,14 @@ let
     btrfs / --data=0 --metadata=1 --label=root btrfs.1 btrfs.2
   '';
 
+  ksF2fs = pkgs.writeText "ks-f2fs" ''
+    clearpart --all --initlabel --drives=vdb
+
+    part swap  --recommended --label=swap --fstype=swap --ondisk=vdb
+    part /boot --recommended --label=boot --fstype=f2fs --ondisk=vdb
+    part /     --recommended --label=root --fstype=f2fs --ondisk=vdb
+  '';
+
   ksRaid = pkgs.writeText "ks-raid" ''
     clearpart --all --initlabel --drives=vdb,vdc
 
@@ -193,6 +201,16 @@ in {
       remountAndCheck;
     };
 
+    parttest "f2fs filesystem", sub {
+      $machine->succeed("modprobe f2fs");
+      kickstart("${ksF2fs}");
+      ensurePartition("swap", "swap");
+      ensurePartition("boot", "f2fs");
+      ensurePartition("root", "f2fs");
+      remoteAndCheck;
+      ensureMountPoint("/mnt/boot", "f2fs");
+    };
+
     parttest "RAID1 with XFS", sub {
       kickstart("${ksRaid}");
       ensurePartition("swap1", "swap");