Re: [PATCH bpf-next 1/5] bpf: Handle 8-byte values in DEVMAP and DEVMAP_HASH

On 5/27/20 4:26 AM, Jesper Dangaard Brouer wrote:

IMHO we really need to leverage BTF here, as I'm sure we need to do more
extensions, and this size matching will get more and more unmaintainable.

With BTF in place, dumping the map via bpftool, will also make the
fields "self-documenting".

furthermore, the kernel is changing the value - an fd is passed in and
an id is returned. I do not see how any of this fits into BTF.