From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D405F301466; Sat, 20 Sep 2025 12:21:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758370884; cv=none; b=eE+dSvNGNW7lVDNvGHj9ILx4PBCt8tWfr7ATxC8fGk8QZaqDpsNHIONLNpgSj1bxLEX101B7R/he4jq3xRcgvrL8tdLEqnply9NLQIJWATVvkIckoW1gKK2NpFpPOSqiM6sXPCM7iA3GzUex+aKIIujVqX5FC2kbqR1dII5c6Bk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758370884; c=relaxed/simple; bh=3CR7RjVcRyDsVXnHpze6aotTbagI9yFdEz/x13ifMtw=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=M4x7hDhYvcujpnTIwdFuFxN8+UitK1DCzjCq354uSM5UJqgDtXMPx9fdpTqKbo1wI4UwLSQ+OTZy68SuJ+w5U5QXJ/Uywzf/rPa6Ex3oX65VMkVnxBkwm+VI0HRG1PLyQYiUYsapHOpzjnxJZOK3SR5V0KpY3iSYZtBrqTx1MMs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=L+oW7lzK; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="L+oW7lzK" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D95E5C4CEF9; Sat, 20 Sep 2025 12:21:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1758370884; bh=3CR7RjVcRyDsVXnHpze6aotTbagI9yFdEz/x13ifMtw=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=L+oW7lzKy4BoamfewGWcvpKBmh/wVXSG6wbZEg56hLK7kitrSnVW2dNdSGk8HQ8/j S1XdCpDDJOQxxTZork+03eR7rFPd63zZPbhjypOBUZlrPq1ZS6Vwz2IL9571imPRiu uITfK8sXqJftbRPBkv+T5Dnu0Vj7d6AYFPt02I+dRWBc7rTdrkRR2S1efReNCcPWKb jOt7jup9Et16XSReCjnA3bkQICffFtWUEvXo5rZ0ZO+fPKH57ZGGohQO+noiFOT5jM KeYHb5UQ5DOl+xO4DJmO4btEnS8RBeG7uugw+bndkzOjZD4DE7tRoeJ/tFd70uopob YcxzmVssEA5gg== From: Lorenzo Bianconi Date: Sat, 20 Sep 2025 14:20:29 +0200 Subject: [PATCH RFC bpf-next 3/6] veth: Add xmo_rx_checksum callback to veth driver Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20250920-xdp-meta-rxcksum-v1-3-35e76a8a84e7@kernel.org> References: <20250920-xdp-meta-rxcksum-v1-0-35e76a8a84e7@kernel.org> In-Reply-To: <20250920-xdp-meta-rxcksum-v1-0-35e76a8a84e7@kernel.org> To: Donald Hunter , Jakub Kicinski , "David S. Miller" , Eric Dumazet , Paolo Abeni , Simon Horman , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Stanislav Fomichev , Andrew Lunn , Tony Nguyen , Przemek Kitszel , Alexander Lobakin , Andrii Nakryiko , Martin KaFai Lau , Eduard Zingerman , Song Liu , Yonghong Song , KP Singh , Hao Luo , Jiri Olsa , Shuah Khan Cc: netdev@vger.kernel.org, bpf@vger.kernel.org, intel-wired-lan@lists.osuosl.org, linux-kselftest@vger.kernel.org, Lorenzo Bianconi X-Mailer: b4 0.14.2 Implement xmo_rx_checksum callback in veth driver to report RX checksum result to the eBPF program bounded to the NIC. Signed-off-by: Lorenzo Bianconi --- drivers/net/veth.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/drivers/net/veth.c b/drivers/net/veth.c index a3046142cb8e2658a30041129f8d298e5e0a5822..2a762cb132fd9fd90376965c65c4fedcc28a26c8 100644 --- a/drivers/net/veth.c +++ b/drivers/net/veth.c @@ -1692,6 +1692,24 @@ static int veth_xdp_rx_vlan_tag(const struct xdp_md *ctx, __be16 *vlan_proto, return err; } +static int veth_xdp_rx_checksum(const struct xdp_md *ctx, u8 *ip_summed, + u32 *cksum_meta) +{ + const struct veth_xdp_buff *_ctx = (void *)ctx; + const struct sk_buff *skb = _ctx->skb; + + if (!skb) + return -ENODATA; + + /* For locally generated packets ip_summed is set to + * CHECKSUM_PARTIAL. + */ + *ip_summed = skb->ip_summed; + *cksum_meta = 0; + + return 0; +} + static const struct net_device_ops veth_netdev_ops = { .ndo_init = veth_dev_init, .ndo_open = veth_open, @@ -1717,6 +1735,7 @@ static const struct xdp_metadata_ops veth_xdp_metadata_ops = { .xmo_rx_timestamp = veth_xdp_rx_timestamp, .xmo_rx_hash = veth_xdp_rx_hash, .xmo_rx_vlan_tag = veth_xdp_rx_vlan_tag, + .xmo_rx_checksum = veth_xdp_rx_checksum, }; #define VETH_FEATURES (NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HW_CSUM | \ -- 2.51.0