Re: [PATCH bpf-next 1/2] bpf: add bpf_dynptr_memset() kfunc

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Subject: Re: [PATCH bpf-next 1/2] bpf: add bpf_dynptr_memset() kfunc
From: Eduard Zingerman <eddyz87@xxxxxxxxx>
Date: Thu, 19 Jun 2025 10:19:20 -0700
Cc: bpf@xxxxxxxxxxxxxxx, ast@xxxxxxxxxx, daniel@xxxxxxxxxxxxx, mykolal@xxxxxx, kernel-team@xxxxxxxx
In-reply-to: <45390c6c-bd2a-4962-8222-1ad346f9908c@linux.dev>
User-agent: Evolution 3.54.3 (3.54.3-1.fc41)

On Thu, 2025-06-19 at 10:09 -0700, Ihor Solodrai wrote:

[...]

> But then, does memset even make sense for xdp/skb buffers?

Why not?

> Maybe -ENOTSUPP is more appropriate?
> 
> I'd appreciate any hints.

I think Mykyta has kernel/trace/bpf_trace.c:__bpf_dynptr_copy_str() in mind.

Follow-Ups:
- Re: [PATCH bpf-next 1/2] bpf: add bpf_dynptr_memset() kfunc
  - From: Mykyta Yatsenko
- Re: [PATCH bpf-next 1/2] bpf: add bpf_dynptr_memset() kfunc
  - From: Ihor Solodrai

References:
- [PATCH bpf-next 1/2] bpf: add bpf_dynptr_memset() kfunc
  - From: Ihor Solodrai
- Re: [PATCH bpf-next 1/2] bpf: add bpf_dynptr_memset() kfunc
  - From: Mykyta Yatsenko
- Re: [PATCH bpf-next 1/2] bpf: add bpf_dynptr_memset() kfunc
  - From: Ihor Solodrai

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