[Unit] Description=Rollback bootfs just before it is mounted Requisite=zfs-import.target After=zfs-import.target zfs-snapshot-bootfs.service Before=dracut-mount.service DefaultDependencies=no ConditionKernelCommandLine=bootfs.rollback [Service] # ${BOOTFS} should have been set by zfs-env-bootfs.service Type=oneshot ExecStartPre=/bin/sh -c 'test -n "${BOOTFS}"' ExecStart=/bin/sh -c '. /lib/dracut-lib.sh; SNAPNAME="$(getarg bootfs.rollback)"; @sbindir@/zfs rollback -Rf "${BOOTFS}@${SNAPNAME:-%v}"' RemainAfterExit=yes