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Fri, 12 May 2023 15:20:59 +0000 (UTC) X-IronPort-AV: E=McAfee;i="6600,9927,10708"; a="353061225" X-IronPort-AV: E=Sophos;i="5.99,269,1677571200"; d="scan'208";a="353061225" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 May 2023 08:20:52 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10708"; a="812114475" X-IronPort-AV: E=Sophos;i="5.99,269,1677571200"; d="scan'208";a="812114475" Received: from irvmail002.ir.intel.com ([10.43.11.120]) by fmsmga002.fm.intel.com with ESMTP; 12 May 2023 08:20:41 -0700 Received: from lincoln.igk.intel.com (lincoln.igk.intel.com [10.102.21.235]) by irvmail002.ir.intel.com (Postfix) with ESMTP id 9E44536351; Fri, 12 May 2023 16:20:38 +0100 (IST) From: Larysa Zaremba To: bpf@vger.kernel.org Date: Fri, 12 May 2023 17:16:35 +0200 Message-Id: <20230512151639.992033-12-larysa.zaremba@intel.com> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20230512151639.992033-1-larysa.zaremba@intel.com> References: <20230512151639.992033-1-larysa.zaremba@intel.com> MIME-Version: 1.0 X-Mailman-Original-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1683904860; x=1715440860; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=HYcETTLQrd7Q2kE/D+/Vk/4DhcDrCT+MKt7UQ1PXhqI=; b=YsRMdp5LwF9qzpMRxWti6ZmT4UmJsH8nOBILWPOOm8Y/dgq64xvR9DIH nT+XCmDWFhSuwr8biriG84V790ijhRh82wQEQcZHCByoxw5mNm2PVY3fi rGnk5cIlGgg0vMEWMQGvAGbrvIMxX2+GmZpx8+UsFwczRMJXc1kIT0fu2 zeyZmTDqhzhnjxbTth1hawmxjP8L2kztC0+i2NwhKuHjCPQ3E6cbeoGN5 EE1NTjNtqNz+dczgrUhq3XLL0MqanvSaLAOjQWOgM2YONOAw5ulzcrPlY 9gjIMtwiW8rQ7D8GiyRaTYwA5ypVmjCtx6CUHg19/o+9mfpeQa7uxcbHZ w==; X-Mailman-Original-Authentication-Results: smtp1.osuosl.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.a=rsa-sha256 header.s=Intel header.b=YsRMdp5L Subject: [Intel-wired-lan] [PATCH 11/15] xdp: Add checksum level hint X-BeenThere: intel-wired-lan@osuosl.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel Wired Ethernet Linux Kernel Driver Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Anatoly Burakov , Alexei Starovoitov , Andrii Nakryiko , Song Liu , Tony Nguyen , Stanislav Fomichev , Maryam Tahhan , xdp-hints@xdp-project.net, Daniel Borkmann , John Fastabend , Jesse Brandeburg , intel-wired-lan@lists.osuosl.org, Jesper Dangaard Brouer , Yonghong Song , Larysa Zaremba , KP Singh , Jakub Kicinski , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Jiri Olsa , Martin KaFai Lau Errors-To: intel-wired-lan-bounces@osuosl.org Sender: "Intel-wired-lan" 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/networking/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 +.. 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); }; /** 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 *info, 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) \ 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 = ops->xmo_rx_ctag; else if (func_id == bpf_xdp_metadata_kfunc_id(XDP_METADATA_KFUNC_RX_STAG)) p = ops->xmo_rx_stag; + else if (func_id == bpf_xdp_metadata_kfunc_id(XDP_METADATA_KFUNC_RX_CSUM_LVL)) + p = ops->xmo_rx_csum_lvl; out: up_read(&bpf_devs_lock); 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; } +/** + * bpf_xdp_metadata_rx_csum_lvl - Get depth at which HW has checked the checksum. + * @ctx: XDP context pointer. + * @csum_level: Return value pointer. + * + * Returns 0 on success (HW has checked the checksum) or ``-errno`` on error. + */ +__bpf_kfunc int bpf_xdp_metadata_rx_csum_lvl(const struct xdp_md *ctx, u8 *csum_level) +{ + return -EOPNOTSUPP; +} + __diag_pop(); BTF_SET8_START(xdp_metadata_kfunc_ids)