The direction needs to be included in the IOCTL call.
Fixes: b91d7d9d78 ("ltq-*-app: extend ubus metrics/statistics")
Signed-off-by: Jan Hoffmann <jan@3e8.eu>
Link: https://github.com/openwrt/openwrt/pull/19363
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>