Re: [PATCH] net: skb: move enum skb_drop_reason to uapi

[Jakub Kicinski]

On Fri, 11 Mar 2022 11:28:28 +0800 menglong8.dong@xxxxxxxxx wrote:
> From: Menglong Dong <imagedong@xxxxxxxxxxx>
> 
> Move the definition of 'enum skb_drop_reason' in 'skbuff.h' to the uapi
> header 'net_dropmon.h', therefore some users, such as eBPF program, can
> make use of it.

BPF does not need an enum definition to be part of the uAPI to make use
of it. BTF should encode the values, and CO-RE can protect from them
changing, AFAIU. I think we need a better example user / justification.