zfs+cryptsetup

zfs-remount.sh

$ sudo zpool import -d /dev/nvme0n1p4 rpool -f
$ zfs get keylocation,encryption,keyformat rpool
NAME   PROPERTY     VALUE                                  SOURCE
rpool  keylocation  file:///run/keystore/rpool/system.key  local
rpool  encryption   aes-256-gcm                            -
rpool  keyformat    raw                                    -
$ sudo cryptsetup open /dev/zvol/rpool/keystore rpool-key
password
$ sudo mkdir -p /run/keystore/rpool
$ sudo mount /dev/mapper/rpool-key /run/keystore/rpool
$ sudo zfs load-key -a
$ sudo zfs list
$ sudo zfs set mountpoint=/mnt/rpool/home rpool/USERDATA/home_...
...
$ sudo zfs mount rpool/USERDATA/home_...