From nobody Mon Feb 9 16:13:11 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A7820C77B7C for ; Fri, 12 May 2023 15:30:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241969AbjELPaL (ORCPT ); Fri, 12 May 2023 11:30:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47038 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241984AbjELP3d (ORCPT ); Fri, 12 May 2023 11:29:33 -0400 Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 769C310A27; Fri, 12 May 2023 08:29:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1683905352; x=1715441352; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=HYcETTLQrd7Q2kE/D+/Vk/4DhcDrCT+MKt7UQ1PXhqI=; b=AtWlfk5Ns/AAFJoaLyGKCklGR+VvhXiduzd7XifJDRjz1KyuRtVfukXR dBPtm9NuY9B+mEzw7UUAw1L99nUHbRlnU1uYIOk2oT+vEGs5yQoTVe+lQ 4RME58aPYTUBTUn7wl7xIu5UGYLHZQTEN+WosaPyC6xVUbPIqPGVk5uiK aJKFG97zeHunzrAXAqsiRDABIal0+7LtshFZCMi4fdAbIy5gQ09X/2yOQ ew3yieQp75PGHD3v0BZv7lMtZMzJw8h2+K+Z5un+VHJs79elEKyXj8nqm /+6JKkBz7ufFp4ArCatOZzPMFg1Y+JS1H7AOg5RAq0P76equvfKAan3Cb A==; X-IronPort-AV: E=McAfee;i="6600,9927,10708"; a="349653433" X-IronPort-AV: E=Sophos;i="5.99,269,1677571200"; d="scan'208";a="349653433" Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 May 2023 08:29:02 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10708"; a="1030124584" X-IronPort-AV: E=Sophos;i="5.99,269,1677571200"; d="scan'208";a="1030124584" Received: from irvmail002.ir.intel.com ([10.43.11.120]) by fmsmga005.fm.intel.com with ESMTP; 12 May 2023 08:28:57 -0700 Received: from lincoln.igk.intel.com (lincoln.igk.intel.com [10.102.21.235]) by irvmail002.ir.intel.com (Postfix) with ESMTP id 0596335FB8; Fri, 12 May 2023 16:28:55 +0100 (IST) From: Larysa Zaremba To: bpf@vger.kernel.org Cc: Larysa Zaremba , Stanislav Fomichev , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Jakub Kicinski , Martin KaFai Lau , Song Liu , Yonghong Song , John Fastabend , KP Singh , Jiri Olsa , Jesse Brandeburg , Tony Nguyen , Anatoly Burakov , Jesper Dangaard Brouer , Alexander Lobakin , Magnus Karlsson , Maryam Tahhan , xdp-hints@xdp-project.net, netdev@vger.kernel.org, intel-wired-lan@lists.osuosl.org, linux-kernel@vger.kernel.org Subject: [PATCH RESEND bpf-next 11/15] xdp: Add checksum level hint Date: Fri, 12 May 2023 17:26:03 +0200 Message-Id: <20230512152607.992209-12-larysa.zaremba@intel.com> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20230512152607.992209-1-larysa.zaremba@intel.com> References: <20230512152607.992209-1-larysa.zaremba@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Implement functionality that enables drivers to expose to XDP code, whether checksums was checked and on what level. Signed-off-by: Larysa Zaremba --- Documentation/networking/xdp-rx-metadata.rst | 3 +++ include/linux/netdevice.h | 1 + include/net/xdp.h | 2 ++ kernel/bpf/offload.c | 2 ++ net/core/xdp.c | 12 ++++++++++++ 5 files changed, 20 insertions(+) diff --git a/Documentation/networking/xdp-rx-metadata.rst b/Documentation/n= etworking/xdp-rx-metadata.rst index 73a78029c596..f74f0e283097 100644 --- a/Documentation/networking/xdp-rx-metadata.rst +++ b/Documentation/networking/xdp-rx-metadata.rst @@ -29,6 +29,9 @@ metadata is supported, this set will grow: .. kernel-doc:: net/core/xdp.c :identifiers: bpf_xdp_metadata_rx_stag =20 +.. kernel-doc:: net/core/xdp.c + :identifiers: bpf_xdp_metadata_rx_csum_lvl + An XDP program can use these kfuncs to read the metadata into stack variables for its own consumption. Or, to pass the metadata on to other consumers, an XDP program can store it into the metadata area carried diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index fdae37fe11f5..ddade3a15366 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -1657,6 +1657,7 @@ struct xdp_metadata_ops { enum xdp_rss_hash_type *rss_type); int (*xmo_rx_ctag)(const struct xdp_md *ctx, u16 *vlan_tag); int (*xmo_rx_stag)(const struct xdp_md *ctx, u16 *vlan_tag); + int (*xmo_rx_csum_lvl)(const struct xdp_md *ctx, u8 *csum_level); }; =20 /** diff --git a/include/net/xdp.h b/include/net/xdp.h index 2db7439fc60f..0fbd25616241 100644 --- a/include/net/xdp.h +++ b/include/net/xdp.h @@ -393,6 +393,8 @@ void xdp_attachment_setup(struct xdp_attachment_info *i= nfo, bpf_xdp_metadata_rx_ctag) \ XDP_METADATA_KFUNC(XDP_METADATA_KFUNC_RX_STAG, \ bpf_xdp_metadata_rx_stag) \ + XDP_METADATA_KFUNC(XDP_METADATA_KFUNC_RX_CSUM_LVL, \ + bpf_xdp_metadata_rx_csum_lvl) \ =20 enum { #define XDP_METADATA_KFUNC(name, _) name, diff --git a/kernel/bpf/offload.c b/kernel/bpf/offload.c index 2c6b6e82cfac..8bd54fb4ac63 100644 --- a/kernel/bpf/offload.c +++ b/kernel/bpf/offload.c @@ -852,6 +852,8 @@ void *bpf_dev_bound_resolve_kfunc(struct bpf_prog *prog= , u32 func_id) p =3D ops->xmo_rx_ctag; else if (func_id =3D=3D bpf_xdp_metadata_kfunc_id(XDP_METADATA_KFUNC_RX_S= TAG)) p =3D ops->xmo_rx_stag; + else if (func_id =3D=3D bpf_xdp_metadata_kfunc_id(XDP_METADATA_KFUNC_RX_C= SUM_LVL)) + p =3D ops->xmo_rx_csum_lvl; out: up_read(&bpf_devs_lock); =20 diff --git a/net/core/xdp.c b/net/core/xdp.c index eff21501609f..7dd45fd62983 100644 --- a/net/core/xdp.c +++ b/net/core/xdp.c @@ -762,6 +762,18 @@ __bpf_kfunc int bpf_xdp_metadata_rx_stag(const struct = xdp_md *ctx, u16 *vlan_tag return -EOPNOTSUPP; } =20 +/** + * bpf_xdp_metadata_rx_csum_lvl - Get depth at which HW has checked the ch= ecksum. + * @ctx: XDP context pointer. + * @csum_level: Return value pointer. + * + * Returns 0 on success (HW has checked the checksum) or ``-errno`` on err= or. + */ +__bpf_kfunc int bpf_xdp_metadata_rx_csum_lvl(const struct xdp_md *ctx, u8 = *csum_level) +{ + return -EOPNOTSUPP; +} + __diag_pop(); =20 BTF_SET8_START(xdp_metadata_kfunc_ids) --=20 2.35.3