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GET /api/patches/2196363/?format=api
{ "id": 2196363, "url": "http://patchwork.ozlabs.org/api/patches/2196363/?format=api", "web_url": "http://patchwork.ozlabs.org/project/intel-wired-lan/patch/20260213-bpf-xdp-meta-rxcksum-v2-1-a82c4802afbe@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": "<20260213-bpf-xdp-meta-rxcksum-v2-1-a82c4802afbe@kernel.org>", "list_archive_url": null, "date": "2026-02-13T15:26:20", "name": "[bpf-next,v2,1/5] netlink: specs: Add XDP RX checksum capability to XDP metadata specs", "commit_ref": null, "pull_url": null, "state": "handled-elsewhere", "archived": false, "hash": "be9c83e1915832c2fcd41c01c304058ab136662b", "submitter": { "id": 76007, "url": "http://patchwork.ozlabs.org/api/people/76007/?format=api", "name": "Lorenzo Bianconi", "email": "lorenzo@kernel.org" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/intel-wired-lan/patch/20260213-bpf-xdp-meta-rxcksum-v2-1-a82c4802afbe@kernel.org/mbox/", "series": [ { "id": 492113, "url": "http://patchwork.ozlabs.org/api/series/492113/?format=api", "web_url": "http://patchwork.ozlabs.org/project/intel-wired-lan/list/?series=492113", "date": "2026-02-13T15:26:20", "name": "Add the the capability to load HW RX checsum in eBPF programs", "version": 2, "mbox": "http://patchwork.ozlabs.org/series/492113/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2196363/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2196363/checks/", "tags": {}, "related": [], "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=jLzJ/gAk;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=osuosl.org\n (client-ip=140.211.166.138; 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envelope-from=intel-wired-lan-bounces@osuosl.org;\n receiver=<UNKNOWN> ", "DKIM-Filter": [ "OpenDKIM Filter v2.11.0 smtp1.osuosl.org 0ED1B844AC", "OpenDKIM Filter v2.11.0 smtp1.osuosl.org 952F7844AB" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=osuosl.org;\n\ts=default; t=1770996427;\n\tbh=vUeH6dRgvpYGFGfgBcHtGKEv8HY1bL48rkJYSmPg/4g=;\n\th=From:Date:References:In-Reply-To:To:Cc:Subject:List-Id:\n\t List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe:\n\t From;\n\tb=jLzJ/gAk9QJ18M3AYYzv3ur+AMd53msoszBw/pmp26RUnunhnejuA4dA+1RmVupPa\n\t SzQxvXd0YUiBRTqyzVO2nHMvZdgN6nck2hsqStjneer7BA0In6sUqeHBWiIwLjXE38\n\t GpGX/aNy5qyfl7pKncMYdu2iL5bPkQeHq54eOp0Zl7yoGeytDmX8w+cfX8LkBiX5GY\n\t wNaAwzXseaMwEPBKinNbe3dncUHNDVRQR52cBrfQNJwpU8TFjz7Lrmg99iJceA59HE\n\t 7Kd4/IBOt5yGppj82/Y8WtqXg+cFz5buhVB+WWOqhEf3JjvxU4t50EX89kh5PInP63\n\t 1R9WuAoMvsm5Q==", "Received-SPF": "Pass (mailfrom) identity=mailfrom; client-ip=172.105.4.254;\n helo=tor.source.kernel.org; envelope-from=lorenzo@kernel.org;\n receiver=<UNKNOWN>", "DMARC-Filter": "OpenDMARC Filter v1.4.2 smtp1.osuosl.org 952F7844AB", "From": "Lorenzo Bianconi <lorenzo@kernel.org>", "Date": "Fri, 13 Feb 2026 16:26:20 +0100", "MIME-Version": "1.0", "Content-Type": "text/plain; charset=\"utf-8\"", "Content-Transfer-Encoding": "7bit", "Message-Id": "<20260213-bpf-xdp-meta-rxcksum-v2-1-a82c4802afbe@kernel.org>", "References": "<20260213-bpf-xdp-meta-rxcksum-v2-0-a82c4802afbe@kernel.org>", "In-Reply-To": "<20260213-bpf-xdp-meta-rxcksum-v2-0-a82c4802afbe@kernel.org>", "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=1770996423;\n bh=EiGaUL0ROvikOtaVZH/yKZqISOioK3OyNtnUo8P3Yhk=;\n h=From:Date:Subject:References:In-Reply-To:To:Cc:From;\n b=mW4FxCdrzTg+jglxtFS9riskLYBPZIGlvSE1xXBjIhch53csKnZM8Oyw3wGiGsjb8\n RW2Whh87yBkM9/svGY0AUv6gQApMtL/xnPtuOuiOyobhsxJglCrnkLNwAMnW4BgGvy\n gbMEYLhetNiw4M54Nx9X9lJHQkMsvoQKxeQwwjsV2YAsdiJF3k0AkNPCFip158FQ3c\n Ymkr2QKTtlPjp6/fwMqYYPP6O3OlYyaJD49/SHdX3GP5bro2TmDwJ63rNyrv86RXdH\n F00AKFtAmbLvB7cBcFt6NxlRDL55/9iY+UWsYaeIblrvnqvLdh31Ob4KnFoGBAjWEh\n AJZWLocF2T1QQ==", "X-Mailman-Original-Authentication-Results": [ "smtp1.osuosl.org;\n dmarc=pass (p=quarantine dis=none)\n header.from=kernel.org", "smtp1.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=mW4FxCdr" ], "Subject": "[Intel-wired-lan] [PATCH bpf-next v2 1/5] netlink: specs: Add XDP\n RX checksum capability to XDP metadata specs", "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 XDP RX checksum capability to XDP metadata specs. XDP RX\nchecksum will be use by devices capable of exposing receive checksum\nresult via bpf_xdp_metadata_rx_checksum().\nMoreover, introduce xmo_rx_checksum netdev callback in order allow the\neBPF program bounded to the device to retrieve the RX checksum result\ncomputed by the hw NIC.\n\nSigned-off-by: Lorenzo Bianconi <lorenzo@kernel.org>\n---\n Documentation/netlink/specs/netdev.yaml | 5 +++++\n include/net/xdp.h | 13 +++++++++++++\n include/uapi/linux/netdev.h | 3 +++\n net/core/xdp.c | 28 ++++++++++++++++++++++++++++\n tools/include/uapi/linux/netdev.h | 3 +++\n 5 files changed, 52 insertions(+)", "diff": "diff --git a/Documentation/netlink/specs/netdev.yaml b/Documentation/netlink/specs/netdev.yaml\nindex 596c306ce52b8303b20680ff0cd34d4fd9db0e48..58eda634668a07860447a65d9fc2284839af6244 100644\n--- a/Documentation/netlink/specs/netdev.yaml\n+++ b/Documentation/netlink/specs/netdev.yaml\n@@ -61,6 +61,11 @@ definitions:\n doc: |\n Device is capable of exposing receive packet VLAN tag via\n bpf_xdp_metadata_rx_vlan_tag().\n+ -\n+ name: checksum\n+ doc: |\n+ Device is capable of exposing receive checksum result via\n+ bpf_xdp_metadata_rx_checksum().\n -\n type: flags\n name: xsk-flags\ndiff --git a/include/net/xdp.h b/include/net/xdp.h\nindex aa742f413c358575396530879af4570dc3fc18de..00abb2e1e85514b4080d0e4e6e3b8f5f67f73b61 100644\n--- a/include/net/xdp.h\n+++ b/include/net/xdp.h\n@@ -586,6 +586,10 @@ void xdp_attachment_setup(struct xdp_attachment_info *info,\n \t\t\t NETDEV_XDP_RX_METADATA_VLAN_TAG, \\\n \t\t\t bpf_xdp_metadata_rx_vlan_tag, \\\n \t\t\t xmo_rx_vlan_tag) \\\n+\tXDP_METADATA_KFUNC(XDP_METADATA_KFUNC_RX_CHECKSUM, \\\n+\t\t\t NETDEV_XDP_RX_METADATA_CHECKSUM, \\\n+\t\t\t bpf_xdp_metadata_rx_checksum, \\\n+\t\t\t xmo_rx_checksum)\n \n enum xdp_rx_metadata {\n #define XDP_METADATA_KFUNC(name, _, __, ___) name,\n@@ -643,12 +647,21 @@ enum xdp_rss_hash_type {\n \tXDP_RSS_TYPE_L4_IPV6_SCTP_EX = XDP_RSS_TYPE_L4_IPV6_SCTP | XDP_RSS_L3_DYNHDR,\n };\n \n+enum xdp_checksum {\n+\tXDP_CHECKSUM_NONE\t\t= CHECKSUM_NONE,\n+\tXDP_CHECKSUM_UNNECESSARY\t= CHECKSUM_UNNECESSARY,\n+\tXDP_CHECKSUM_COMPLETE\t\t= CHECKSUM_COMPLETE,\n+};\n+\n struct xdp_metadata_ops {\n \tint\t(*xmo_rx_timestamp)(const struct xdp_md *ctx, u64 *timestamp);\n \tint\t(*xmo_rx_hash)(const struct xdp_md *ctx, u32 *hash,\n \t\t\t enum xdp_rss_hash_type *rss_type);\n \tint\t(*xmo_rx_vlan_tag)(const struct xdp_md *ctx, __be16 *vlan_proto,\n \t\t\t\t u16 *vlan_tci);\n+\tint\t(*xmo_rx_checksum)(const struct xdp_md *ctx,\n+\t\t\t\t enum xdp_checksum *ip_summed,\n+\t\t\t\t u32 *cksum_meta);\n };\n \n #ifdef CONFIG_NET\ndiff --git a/include/uapi/linux/netdev.h b/include/uapi/linux/netdev.h\nindex e0b579a1df4f2126acec6c44c299e97bbbefe640..d20da430cfd57bc26b5ea2f406c27b48d8a81693 100644\n--- a/include/uapi/linux/netdev.h\n+++ b/include/uapi/linux/netdev.h\n@@ -47,11 +47,14 @@ enum netdev_xdp_act {\n * hash via bpf_xdp_metadata_rx_hash().\n * @NETDEV_XDP_RX_METADATA_VLAN_TAG: Device is capable of exposing receive\n * packet VLAN tag via bpf_xdp_metadata_rx_vlan_tag().\n+ * @NETDEV_XDP_RX_METADATA_CHECKSUM: Device is capable of exposing receive\n+ * checksum result via bpf_xdp_metadata_rx_checksum().\n */\n enum netdev_xdp_rx_metadata {\n \tNETDEV_XDP_RX_METADATA_TIMESTAMP = 1,\n \tNETDEV_XDP_RX_METADATA_HASH = 2,\n \tNETDEV_XDP_RX_METADATA_VLAN_TAG = 4,\n+\tNETDEV_XDP_RX_METADATA_CHECKSUM = 8,\n };\n \n /**\ndiff --git a/net/core/xdp.c b/net/core/xdp.c\nindex fee6d080ee85fc2d278bfdddfd1365633058ec06..06d3c2333fa4aacd1b9343471efb0d3150838de5 100644\n--- a/net/core/xdp.c\n+++ b/net/core/xdp.c\n@@ -961,6 +961,34 @@ __bpf_kfunc int bpf_xdp_metadata_rx_vlan_tag(const struct xdp_md *ctx,\n \treturn -EOPNOTSUPP;\n }\n \n+/**\n+ * bpf_xdp_metadata_rx_checksum - Read XDP frame RX checksum.\n+ * @ctx: XDP context pointer.\n+ * @ip_summed: Return value pointer indicating checksum result.\n+ * @cksum_meta: Return value pointer indicating checksum result metadata.\n+ *\n+ * In case of success, ``ip_summed`` is set to the RX checksum result. Possible\n+ * values are:\n+ * ``XDP_CHECKSUM_NONE``\n+ * ``XDP_CHECKSUM_UNNECESSARY``\n+ * ``XDP_CHECKSUM_COMPLETE``\n+ *\n+ * In case of success, ``cksum_meta`` contains the hw computed checksum value\n+ * for ``XDP_CHECKSUM_COMPLETE`` or the ``csum_level`` for\n+ * ``XDP_CHECKSUM_UNNECESSARY``. It is set to 0 for ``XDP_CHECKSUM_NONE``\n+ *\n+ * Return:\n+ * * Returns 0 on success or ``-errno`` on error.\n+ * * ``-EOPNOTSUPP`` : means device driver does not implement kfunc\n+ * * ``-ENODATA`` : means no RX-timestamp available for this frame\n+ */\n+__bpf_kfunc int bpf_xdp_metadata_rx_checksum(const struct xdp_md *ctx,\n+\t\t\t\t\t enum xdp_checksum *ip_summed,\n+\t\t\t\t\t u32 *cksum_meta)\n+{\n+\treturn -EOPNOTSUPP;\n+}\n+\n __bpf_kfunc_end_defs();\n \n BTF_KFUNCS_START(xdp_metadata_kfunc_ids)\ndiff --git a/tools/include/uapi/linux/netdev.h b/tools/include/uapi/linux/netdev.h\nindex e0b579a1df4f2126acec6c44c299e97bbbefe640..d20da430cfd57bc26b5ea2f406c27b48d8a81693 100644\n--- a/tools/include/uapi/linux/netdev.h\n+++ b/tools/include/uapi/linux/netdev.h\n@@ -47,11 +47,14 @@ enum netdev_xdp_act {\n * hash via bpf_xdp_metadata_rx_hash().\n * @NETDEV_XDP_RX_METADATA_VLAN_TAG: Device is capable of exposing receive\n * packet VLAN tag via bpf_xdp_metadata_rx_vlan_tag().\n+ * @NETDEV_XDP_RX_METADATA_CHECKSUM: Device is capable of exposing receive\n+ * checksum result via bpf_xdp_metadata_rx_checksum().\n */\n enum netdev_xdp_rx_metadata {\n \tNETDEV_XDP_RX_METADATA_TIMESTAMP = 1,\n \tNETDEV_XDP_RX_METADATA_HASH = 2,\n \tNETDEV_XDP_RX_METADATA_VLAN_TAG = 4,\n+\tNETDEV_XDP_RX_METADATA_CHECKSUM = 8,\n };\n \n /**\n", "prefixes": [ "bpf-next", "v2", "1/5" ] }