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{ "id": 2195295, "url": "http://patchwork.ozlabs.org/api/covers/2195295/?format=api", "web_url": "http://patchwork.ozlabs.org/project/intel-wired-lan/cover/20260210-bpf-xdp-meta-rxcksum-v1-0-e5d55caa0541@kernel.org/", "project": { "id": 46, "url": "http://patchwork.ozlabs.org/api/projects/46/?format=api", "name": "Intel Wired Ethernet development", "link_name": "intel-wired-lan", "list_id": "intel-wired-lan.osuosl.org", "list_email": "intel-wired-lan@osuosl.org", "web_url": "", "scm_url": "", "webscm_url": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260210-bpf-xdp-meta-rxcksum-v1-0-e5d55caa0541@kernel.org>", "list_archive_url": null, "date": "2026-02-10T17:21:46", "name": "[bpf-next,0/5] Add the the capability to load HW RX checsum in eBPF programs", "submitter": { "id": 76007, "url": "http://patchwork.ozlabs.org/api/people/76007/?format=api", "name": "Lorenzo Bianconi", "email": "lorenzo@kernel.org" }, "mbox": "http://patchwork.ozlabs.org/project/intel-wired-lan/cover/20260210-bpf-xdp-meta-rxcksum-v1-0-e5d55caa0541@kernel.org/mbox/", "series": [ { "id": 491715, "url": "http://patchwork.ozlabs.org/api/series/491715/?format=api", "web_url": "http://patchwork.ozlabs.org/project/intel-wired-lan/list/?series=491715", "date": "2026-02-10T17:21:46", "name": "Add the the capability to load HW RX checsum in eBPF programs", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/491715/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/covers/2195295/comments/", "headers": { "Return-Path": "<intel-wired-lan-bounces@osuosl.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "intel-wired-lan@lists.osuosl.org" ], "Delivered-To": [ "patchwork-incoming@legolas.ozlabs.org", "intel-wired-lan@lists.osuosl.org" ], "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=osuosl.org header.i=@osuosl.org header.a=rsa-sha256\n header.s=default header.b=oJE9N9b5;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=osuosl.org\n (client-ip=2605:bc80:3010::136; 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receiver=<UNKNOWN>", "DMARC-Filter": "OpenDMARC Filter v1.4.2 smtp2.osuosl.org EDC0F4008D", "From": "Lorenzo Bianconi <lorenzo@kernel.org>", "Date": "Tue, 10 Feb 2026 18:21:46 +0100", "Message-Id": "<20260210-bpf-xdp-meta-rxcksum-v1-0-e5d55caa0541@kernel.org>", "MIME-Version": "1.0", "Content-Type": "text/plain; charset=\"utf-8\"", "Content-Transfer-Encoding": "7bit", "X-B4-Tracking": "v=1; b=H4sIAAAAAAAC/4WNQQ6CMBBFr0Jm7ZhSU6SuuIdhAXQKDUKbKRIM4\n e5WLuDyveS/v0MkdhThke3AtLro/Jwgv2TQDc3cEzqTGKSQSmipsA0WNxNwoqVB3roxvifUQhS\n lIqmFNpCmgcm67cw+68SDi4vnz/myyp/9E1wlCizamyVd3jvSeTUSz/S6eu6hPo7jCxFkhzO5A\n AAA", "X-Change-ID": "20250925-bpf-xdp-meta-rxcksum-900685e2909d", "To": "Donald Hunter <donald.hunter@gmail.com>,\n Jakub Kicinski <kuba@kernel.org>, \"David S. Miller\" <davem@davemloft.net>,\n Eric Dumazet <edumazet@google.com>, Paolo Abeni <pabeni@redhat.com>,\n Simon Horman <horms@kernel.org>, Alexei Starovoitov <ast@kernel.org>,\n Daniel Borkmann <daniel@iogearbox.net>,\n Jesper Dangaard Brouer <hawk@kernel.org>,\n John Fastabend <john.fastabend@gmail.com>,\n Stanislav Fomichev <sdf@fomichev.me>, Andrew Lunn <andrew+netdev@lunn.ch>,\n Tony Nguyen <anthony.l.nguyen@intel.com>,\n Przemek Kitszel <przemyslaw.kitszel@intel.com>,\n Alexander Lobakin <aleksander.lobakin@intel.com>,\n Andrii Nakryiko <andrii@kernel.org>,\n Martin KaFai Lau <martin.lau@linux.dev>,\n Eduard Zingerman <eddyz87@gmail.com>, Song Liu <song@kernel.org>,\n Yonghong Song <yonghong.song@linux.dev>, KP Singh <kpsingh@kernel.org>,\n Hao Luo <haoluo@google.com>, Jiri Olsa <jolsa@kernel.org>,\n Shuah Khan <shuah@kernel.org>,\n Maciej Fijalkowski <maciej.fijalkowski@intel.com>", "Cc": "Jakub Sitnicki <jakub@cloudflare.com>, netdev@vger.kernel.org,\n bpf@vger.kernel.org, intel-wired-lan@lists.osuosl.org,\n linux-kselftest@vger.kernel.org, Lorenzo Bianconi <lorenzo@kernel.org>", "X-Mailer": "b4 0.14.2", "X-Mailman-Original-DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/simple;\n d=kernel.org; s=k20201202; t=1770744124;\n bh=2gXAQUZwt1m8QP/RD9+/QxmuC5Ub8RRVPrxGR9ZsYoU=;\n h=From:Subject:Date:To:Cc:From;\n b=Nqofsrd98XpnLI5MRiATQ28YBTk/rzXZjVERm8iB11RKSRZXkH57TMEDejNr/awZO\n 29nvxpL0FFKpGXsMRSxScdzGQmfveZSwzIU8AMhesztdS06Od0AAlsbJ/iMnSGWYHO\n 8domYBkwWPxgOveYFlAsxZjg1u64kcgJWRB3FyNwZeykfEYdFG3F+I/kgVv3RJ9JfY\n a1ClyowQ1BLlqQg/G8+ZdvL8kj+ZXzabgDetiZxrr1rAuee9GvDRlqIOawwHSDugGc\n 3WhjX0qgvs5HNxKuTP6oWMPB44c9DQAQyQm+5MJ6cbEvg22adEeq9i4EpJJKVjcMK9\n 0A0Z+Tv+SR2+A==", "X-Mailman-Original-Authentication-Results": [ "smtp2.osuosl.org;\n dmarc=pass (p=quarantine dis=none)\n header.from=kernel.org", "smtp2.osuosl.org;\n dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org\n header.a=rsa-sha256 header.s=k20201202 header.b=Nqofsrd9" ], "Subject": "[Intel-wired-lan] [PATCH bpf-next 0/5] Add the the capability to\n load HW RX checsum in eBPF programs", "X-BeenThere": "intel-wired-lan@osuosl.org", "X-Mailman-Version": "2.1.30", "Precedence": "list", "List-Id": "Intel Wired Ethernet Linux Kernel Driver Development\n <intel-wired-lan.osuosl.org>", "List-Unsubscribe": "<https://lists.osuosl.org/mailman/options/intel-wired-lan>,\n <mailto:intel-wired-lan-request@osuosl.org?subject=unsubscribe>", "List-Archive": "<http://lists.osuosl.org/pipermail/intel-wired-lan/>", "List-Post": "<mailto:intel-wired-lan@osuosl.org>", "List-Help": "<mailto:intel-wired-lan-request@osuosl.org?subject=help>", "List-Subscribe": "<https://lists.osuosl.org/mailman/listinfo/intel-wired-lan>,\n <mailto:intel-wired-lan-request@osuosl.org?subject=subscribe>", "Errors-To": "intel-wired-lan-bounces@osuosl.org", "Sender": "\"Intel-wired-lan\" <intel-wired-lan-bounces@osuosl.org>" }, "content": "Introduce bpf_xdp_metadata_rx_checksum() kfunc in order to load the HW\nRX cheksum results in the eBPF program binded to the NIC.\nImplement xmo_rx_checksum callback for veth and ice drivers.\n\nIf the hardware detects a wrong/failed checksum, it will report\nCHECKSUM_NONE in the packet metadata. Moreover, CHECKSUM_NONE will be\nreturned even if the NIC can't parse the packet (e.g. if it does not\nsupport a specific protocol). A possible use case for\nbpf_xdp_metadata_rx_checksum() would be to implement a XDP DDoS\napplication [1] combining the info from bpf_xdp_metadata_rx_checksum()\nand bpf_xdp_metadata_rx_hash() kfuncs in order to filter packets with a\nwrong/failed checksum.\n\n[1] https://blog.cloudflare.com/unimog-cloudflares-edge-load-balancer/\n\n---\nChanges in v1:\n- Rebase on top of bpf-next\n- Test ice driver using xdp_hw_metadata tool available in the bpf\n kernel selftest\n- Improve cover letter with an use-case for\n bpf_xdp_metadata_rx_checksum()\n- Link to RFC v2: https://lore.kernel.org/r/20250925-bpf-xdp-meta-rxcksum-v2-0-6b3fe987ce91@kernel.org\n\nChanges in RFC v2:\n- Squash patch 1/6 and 2/6\n- Introduce enum xdp_checksum definitions\n- Rework ice support to reuse ice_rx_csum codebase\n\n---\nLorenzo Bianconi (5):\n netlink: specs: Add XDP RX checksum capability to XDP metadata specs\n net: veth: Add xmo_rx_checksum callback to veth driver\n net: ice: Add xmo_rx_checksum callback\n selftests/bpf: Add selftest support for bpf_xdp_metadata_rx_checksum\n selftests/bpf: Add bpf_xdp_metadata_rx_checksum support to xdp_hw_metadat prog\n\n Documentation/netlink/specs/netdev.yaml | 5 +\n drivers/net/ethernet/intel/ice/ice_txrx_lib.c | 114 +++++++++++++--------\n drivers/net/veth.c | 20 ++++\n include/net/xdp.h | 14 +++\n include/uapi/linux/netdev.h | 3 +\n net/core/xdp.c | 29 ++++++\n tools/include/uapi/linux/netdev.h | 3 +\n .../selftests/bpf/prog_tests/xdp_metadata.c | 7 ++\n .../testing/selftests/bpf/progs/xdp_hw_metadata.c | 7 ++\n tools/testing/selftests/bpf/progs/xdp_metadata.c | 1 +\n tools/testing/selftests/bpf/xdp_hw_metadata.c | 28 +++++\n tools/testing/selftests/bpf/xdp_metadata.h | 13 +++\n 12 files changed, 204 insertions(+), 40 deletions(-)\n---\nbase-commit: db975debcb8c4cd367a78811bc1ba84c83f854bd\nchange-id: 20250925-bpf-xdp-meta-rxcksum-900685e2909d\n\nBest regards," }