DRBD_A_DISK_CONF_DISK_BARRIER
if (nla_put_u8(skb, DRBD_A_DISK_CONF_DISK_BARRIER, s->disk_barrier))
[DRBD_A_DISK_CONF_DISK_BARRIER] = { .type = NLA_U8, },
nla = ntb[DRBD_A_DISK_CONF_DISK_BARRIER];