Re: [PATCH bpf-next 16/16] selftests/bpf: Add test cases for hash map with dynptr key

[Alexei Starovoitov <alexei.starovoitov@xxxxxxxxx>]

On Tue, Oct 8, 2024 at 2:02 AM Hou Tao <houtao@xxxxxxxxxxxxxxx> wrote:
>
> +
> +SEC("?fentry/" SYS_PREFIX "sys_nanosleep")
> +int BPF_PROG(pure_dynptr_key)

...

> +SEC("?fentry/" SYS_PREFIX "sys_nanosleep")
> +int BPF_PROG(mixed_dynptr_key)

...
> +SEC("?fentry/" SYS_PREFIX "sys_nanosleep")
> +int BPF_PROG(multiple_dynptr_key)

attaching to syscalls with pid filtering is ok-ish,
but it's a few unnecessary steps.
Use tracing prog for non-sleepable and syscall prog for sleepable
and bpf_prog_run() it.
More predictable and no need for a pid filter.