OVS_METER_ATTR_BANDS
nla = nla_nest_start_noflag(reply, OVS_METER_ATTR_BANDS);
[OVS_METER_ATTR_BANDS] = { .type = NLA_NESTED },
nla = nla_nest_start_noflag(reply, OVS_METER_ATTR_BANDS);
if (!a[OVS_METER_ATTR_BANDS])
nla_for_each_nested(nla, a[OVS_METER_ATTR_BANDS], rem)
nla_for_each_nested(nla, a[OVS_METER_ATTR_BANDS], rem) {