From 5414867fd827331aa6ec7771874539ab9d038dda Mon Sep 17 00:00:00 2001
From: Christoph Cullmann <cullmann@kde.org>
Date: Wed, 10 Jan 2024 21:45:59 +0100
Subject: [PATCH] add kuro bcachefs config

---
 kuro/hardware-configuration.nix | 22 +++++------
 kuro/install.txt                | 70 +++++++++++++++++----------------
 2 files changed, 47 insertions(+), 45 deletions(-)

diff --git a/kuro/hardware-configuration.nix b/kuro/hardware-configuration.nix
index 26da79b..93ab2bd 100644
--- a/kuro/hardware-configuration.nix
+++ b/kuro/hardware-configuration.nix
@@ -11,32 +11,32 @@
   boot.initrd.availableKernelModules = [ "xhci_pci" "ahci" "usbhid" "usb_storage" "sd_mod" ];
   boot.initrd.kernelModules = [ "amdgpu" ];
   boot.kernelModules = [ "kvm-amd" ];
-  boot.extraModulePackages = [ ];
 
   fileSystems."/" =
     { device = "none";
       fsType = "tmpfs";
+      neededForBoot = true;
       options = [ "defaults" "size=8G" "mode=755" ];
     };
 
   fileSystems."/boot" =
-    { device = "/dev/disk/by-uuid/263D-A89E";
+    { device = "/dev/disk/by-id/ata-Samsung_SSD_870_QVO_4TB_S5STNF0W806802J-part1";
       fsType = "vfat";
+      neededForBoot = true;
     };
 
-  # system
-  boot.initrd.luks.devices."crypt-system".device = "/dev/disk/by-uuid/f4af1379-93d2-4903-9fb5-5b767d733c66";
-
   fileSystems."/nix" =
-    { device = "/dev/mapper/crypt-system";
-      fsType = "btrfs";
-      options = [ "subvol=nix" "noatime" "nodiratime" ];
+    { device = "/dev/disk/by-id/ata-Samsung_SSD_870_QVO_4TB_S5STNF0W806802J-part2";
+      fsType = "bcachefs";
+      neededForBoot = true;
+      options = [ "noatime" "nodiratime" ];
     };
 
   fileSystems."/data" =
-    { device = "/dev/mapper/crypt-system";
-      fsType = "btrfs";
-      options = [ "subvol=data" "noatime" "nodiratime" ];
+    { device = "/dev/disk/by-id/ata-Samsung_SSD_870_QVO_4TB_S5STNF0W806802J-part3";
+      fsType = "bcachefs";
+      neededForBoot = true;
+      options = [ "noatime" "nodiratime" ];
     };
 
   fileSystems."/home" =
diff --git a/kuro/install.txt b/kuro/install.txt
index a2b56b6..c947f02 100644
--- a/kuro/install.txt
+++ b/kuro/install.txt
@@ -1,3 +1,23 @@
+#
+# kill old efi boot stuff
+#
+
+efibootmgr
+efibootmgr -b 0 -B
+efibootmgr -b 1 -B
+efibootmgr -b 2 -B
+efibootmgr -b 3 -B
+efibootmgr -b 4 -B
+efibootmgr
+
+#
+# install script below
+#
+
+# fix unlocking https://nixos.wiki/wiki/Bcachefs
+nix-env -iA nixos.keyutils
+keyctl link @u @s
+
 # Defining some helper variables (these will be used in later code
 # blocks as well, so make sure to use the same terminal session or
 # redefine them later)
@@ -13,7 +33,8 @@ gdisk -l $DISK
 # create partitions
 parted $DISK -- mklabel gpt
 sgdisk -n 1:0:+1024M -c 1:"EFI System Partition" -t 1:EF00 $DISK
-sgdisk -n 2:0:0 -c 2:"Linux" -t 2:8e00 $DISK
+sgdisk -n 2:0:+256G -c 2:"nix" -t 2:8e00 $DISK
+sgdisk -n 3:0:0 -c 3:"data" -t 3:8e00 $DISK
 parted $DISK -- set 1 boot on
 
 sleep 5
@@ -24,33 +45,9 @@ cat /proc/partitions
 # boot partition
 mkfs.fat -F 32 -n EFIBOOT $DISK-part1
 
-# create the crypto containers
-cryptsetup luksFormat --batch-mode --verify-passphrase $DISK-part2
-
-sleep 5
-
-# open them, set right options persistently
-cryptsetup luksOpen --allow-discards --perf-no_read_workqueue --perf-no_write_workqueue --persistent $DISK-part2 crypt-system
-
-sleep 5
-lsblk --fs
-
-# create btrfs with fast & strong checksumming and fast mounting
-mkfs.btrfs -f --csum xxhash --features block-group-tree /dev/mapper/crypt-system
-
-sleep 5
-btrfs filesystem show
-
-# create all the volumes
-mount /dev/mapper/crypt-system /mnt
-btrfs subvolume create /mnt/data
-btrfs subvolume create /mnt/nix
-
-sleep 5
-btrfs subvolume list /mnt
-
-# umount again, we will only use explicit subvolumes
-umount /mnt
+# create encrypted bcachefs
+bcachefs format --block_size=4096 --errors=ro --metadata_checksum=xxhash --data_checksum=xxhash --compression=lz4 --wide_macs --acl --encrypted --fs_label=nix --discard -f $DISK-part2
+bcachefs format --block_size=4096 --errors=ro --metadata_checksum=xxhash --data_checksum=xxhash --compression=lz4 --wide_macs --acl --encrypted --fs_label=data --discard -f $DISK-part3
 
 # prepare install
 mount -t tmpfs none /mnt
@@ -61,9 +58,9 @@ mkdir -p /mnt/{data,nix,home,boot,root,etc/nixos}
 # mount the ESP
 mount $DISK-part1 /mnt/boot
 
-# mount volumes
-mount -o subvol=data,noatime,nodiratime /dev/mapper/crypt-system /mnt/data
-mount -o subvol=nix,noatime,nodiratime /dev/mapper/crypt-system /mnt/nix
+# mount bcachefs stuff
+mount -o noatime,nodiratime $DISK-part2 /mnt/nix
+mount -o noatime,nodiratime $DISK-part3 /mnt/data
 
 # bind mount persistent stuff to data
 mkdir -p /mnt/{data/home,data/root,data/nixos/$HOST}
@@ -82,9 +79,11 @@ nixos-generate-config --root /mnt
 cp /mnt/etc/nixos/hardware-configuration.nix /tmp
 cp /mnt/etc/nixos/configuration.nix /tmp
 
-# copy data
+# copy config data
 
-sudo rsync -va --delete --one-file-system /data root@kuro.fritz.box:/mnt
+# patch some paths there
+
+sudo scp -r /data/nixos root@192.168.13.100:/mnt/data
 
 # install
 
@@ -93,4 +92,7 @@ nixos-install --no-root-passwd --root /mnt
 # unmount all stuff
 
 umount -Rl /mnt
-cryptsetup luksClose crypt-system
+
+# sync all /data after the install
+
+sudo -E rsync -va --delete --one-file-system /data root@192.168.13.100:/