Hi Jakub, FWIW, I wouldn't object to just leaving this at zero. I don't know of any wireguard userspaces doing anything with the reserved header field. Jason
Hello: This patch was applied to netdev/net-next.git (master) by David S. Miller <davem@xxxxxxxxxxxxx>: Here is the summary with links: - [net-next] genetlink: start to validate reserved header bytes
We had historically not checked that genlmsghdr.reserved is 0 on input which prevents us from using those precious bytes in the future. One use case would be to extend the cmd field, which is current