VDPA_ATTR_DEV_QUEUE_INDEX
if (nla_put_u32(msg, VDPA_ATTR_DEV_QUEUE_INDEX, index))
if (!info->attrs[VDPA_ATTR_DEV_QUEUE_INDEX])
index = nla_get_u32(info->attrs[VDPA_ATTR_DEV_QUEUE_INDEX]);
[VDPA_ATTR_DEV_QUEUE_INDEX] = { .type = NLA_U32 },