nixpkgs/nixos/modules/tasks/filesystems/btrfs.nix

48 lines
1.1 KiB
Nix
Raw Normal View History

{ config, lib, pkgs, ... }:
with lib;
let
inInitrd = any (fs: fs == "btrfs") config.boot.initrd.supportedFilesystems;
in
{
config = mkIf (any (fs: fs == "btrfs") config.boot.supportedFilesystems) {
system.fsPackages = [ pkgs.btrfsProgs ];
boot.initrd.kernelModules = mkIf inInitrd [ "btrfs" "crc32c" ];
boot.initrd.extraUtilsCommands = mkIf inInitrd
''
mkdir -p $out/bin
cp -v ${pkgs.btrfsProgs}/bin/btrfs $out/bin
ln -sv btrfs $out/bin/btrfsck
ln -sv btrfsck $out/bin/fsck.btrfs
# !!! Increases uncompressed initrd by 240k
cp -pv ${pkgs.zlib}/lib/libz.so* $out/lib
cp -pv ${pkgs.lzo}/lib/liblzo2.so* $out/lib
'';
boot.initrd.extraUtilsCommandsTest = mkIf inInitrd
''
$out/bin/btrfs --version
'';
boot.initrd.postDeviceCommands = mkIf inInitrd
''
btrfs device scan
'';
# !!! This is broken. There should be a udev rule to do this when
# new devices are discovered.
jobs.udev.postStart =
''
${pkgs.btrfsProgs}/bin/btrfs device scan
'';
};
}