From 3676e1d8da716383b7d5b613ecd92bf5c96e8f57 Mon Sep 17 00:00:00 2001
From: Ian Kelling <iank@fsf.org>
Date: Mon, 23 Feb 2026 23:06:33 -0500
Subject: [PATCH] automate missing /nocow

---
 fai/config/hooks/partition.DEFAULT | 17 ++++++++++-------
 1 file changed, 10 insertions(+), 7 deletions(-)

diff --git a/fai/config/hooks/partition.DEFAULT b/fai/config/hooks/partition.DEFAULT
index d210a9a..aee20c8 100755
--- a/fai/config/hooks/partition.DEFAULT
+++ b/fai/config/hooks/partition.DEFAULT
@@ -1311,8 +1311,16 @@ btrfs subvolume set-default 0 /mnt # already default, just ensuring it.
 
 # for libreboot systems. grub2 only reads from subvolid=0
 mkdir -p /mnt/grub2
-# todo: this would need some rework if we moved boot into
-# lvm.
+
+# initial setup of extra data fs.
+btrfs subvol create /mnt/nocow
+chattr +C /mnt/nocow
+mkdir /mnt/nocow/{t,user}
+cat > /tmp/fai/fstab <<EOF
+/mnt/root/nocow /nocow  none  nofail,x-systemd.device-timeout=300s,x-systemd.mount-timeout=300s,noatime,subvol=nocow,$mopts
+EOF
+
+
 cp $FAI/distro-install-common/libreboot_grub.cfg /mnt/grub2
 
 if $wipe && [[ -e /mnt/$boot_vol ]]; then
@@ -1331,8 +1339,3 @@ grub-editenv /mnt/grubenv set last_boot=/$boot_vol
 umount /mnt
 
 
-# initial setup of extra data fs, mounted,
-# btrfs subvol create nocow
-# chattr +C nocow
-# mkdir nocow/{t,user}
-# chown iank.iank nocow/{t,user}
-- 
2.30.2