- name: Create btrfs in LUKS container.
  filesystem:
    device: /dev/mapper/cryptroot
    state: present
    type: btrfs

- name: Mount new filesystem to /mnt.
  mount:
    state: mounted
    src: /dev/mapper/cryptroot
    path: /mnt
    fstype: btrfs
    opts: defaults,noatime,compress=zstd

- name: Create Btrfs @ subvolume.
  command:
    cmd: btrfs subvolume create /mnt/@
    creates: /mnt/@

- name: Create Btrfs @/root subvolume.
  command:
    cmd: btrfs subvolume create /mnt/@/root
    creates: /mnt/@/root

- name: Create Btrfs @/home subvolume.
  command:
    cmd: btrfs subvolume create /mnt/@/home
    creates: /mnt/@/home