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Thu, 19 Jun 2025 10:19:22 -0700 (PDT) Received: from [192.168.0.56] ([38.34.87.7]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-7490a68b0desm248589b3a.150.2025.06.19.10.19.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 19 Jun 2025 10:19:22 -0700 (PDT) Message-ID: <7852f30ba177dc5b811bb0840ca0f301df2a8b58.camel@gmail.com> Subject: Re: [PATCH bpf-next 1/2] bpf: add bpf_dynptr_memset() kfunc From: Eduard Zingerman To: Ihor Solodrai , Mykyta Yatsenko , andrii@kernel.org Cc: bpf@vger.kernel.org, ast@kernel.org, daniel@iogearbox.net, mykolal@fb.com, kernel-team@meta.com Date: Thu, 19 Jun 2025 10:19:20 -0700 In-Reply-To: <45390c6c-bd2a-4962-8222-1ad346f9908c@linux.dev> References: <20250618223310.3684760-1-isolodrai@meta.com> <45390c6c-bd2a-4962-8222-1ad346f9908c@linux.dev> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.54.3 (3.54.3-1.fc41) Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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? >=20 > I'd appreciate any hints. I think Mykyta has kernel/trace/bpf_trace.c:__bpf_dynptr_copy_str() in mind= .