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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Stanislav Fomichev , Simon Horman , Andrii Nakryiko , Martin KaFai Lau , Eduard Zingerman , Song Liu , Yonghong Song , KP Singh , Hao Luo , Jiri Olsa , kernel-team@cloudflare.com Subject: Re: [PATCH bpf-next v2 00/16] Decouple skb metadata tracking from MAC header offset In-Reply-To: <20260105-skb-meta-safeproof-netdevs-rx-only-v2-0-a21e679b5afa@cloudflare.com> (Jakub Sitnicki's message of "Mon, 05 Jan 2026 13:14:25 +0100") References: <20260105-skb-meta-safeproof-netdevs-rx-only-v2-0-a21e679b5afa@cloudflare.com> Date: Wed, 14 Jan 2026 12:52:12 +0100 Message-ID: <87ikd4v2c3.fsf@cloudflare.com> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain On Mon, Jan 05, 2026 at 01:14 PM +01, Jakub Sitnicki wrote: > This series continues the effort to provide reliable access to xdp/skb > metadata from BPF context on the receive path. FYI, I'm dropping the effort to make xdp/skb metadata survive L2 encap/decap, following the discussion here and in [1]. Instead, I'll work on an skb local storage backed by an skb extension, similar to what we have for cgroups/sockets/etc. This approach avoids patching skb_push/pull call sites and implicit allocations on hot paths. I'm happy to split out BPF_EMIT_CALL support for prologue/epilogue if it's considered useful on its own. [1] https://lore.kernel.org/r/20260110-skb-meta-fixup-skb_metadata_set-calls-v1-0-1047878ed1b0@cloudflare.com Thanks, -jkbs