On Fri, 2024-05-10 at 11:30 +0100, Alan Maguire wrote:
> Split BPF Type Format (BTF) provides huge advantages in that kernel
> modules only have to provide type information for types that they do not
> share with the core kernel; for core kernel types, split BTF refers to
> core kernel BTF type ids. So for a STRUCT sk_buff, a module that
> uses that structure (or a pointer to it) simply needs to refer to the
> core kernel type id, saving the need to define the structure and its many
> dependents. This cuts down on duplication and makes BTF as compact
> as possible.
[...]
Tested-by: Eduard Zingerman <eddyz87@xxxxxxxxx>
I tried this patch-set with modified pahole:
- test_{verifier,progs,maps} are passing;
- .BTF.base section is added in bpf_testmod.ko;
- bpftool could be used to view BTF both with and w/o -R option.
