> On Thu, Jan 27, 2022 at 09:26:49AM +0100, Dmitrii Dolgov wrote:
> Commit 82e6b1eee6a8 ("bpf: Allow to specify user-provided bpf_cookie for
> BPF perf links") introduced the concept of user specified bpf_cookie,
> which could be accessed by BPF programs using bpf_get_attach_cookie().
> For troubleshooting purposes it is convenient to expose bpf_cookie via
> bpftool as well, so there is no need to meddle with the target BPF
> program itself.
>
> $ bpftool perf
> pid 83 fd 9: prog_id 5 bpf_cookie: 123 tracepoint sched_process_exec
If I'm missing something, and it doesn't make sense, I would be glad to
hear if there are any best practices or intended ways of utilizing
bpf_cookie.
