From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2D79DC55178 for ; Tue, 27 Oct 2020 13:56:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DE79B218AC for ; Tue, 27 Oct 2020 13:56:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603807010; bh=qgUX3f/77l+kJcrhCAy7kvXCnEBpZGlcbMssYFrBj94=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=rIdF6qjST0IlEUsm1oNBuNKuuvtltNnluKrP4h6suyjHz5svGO9wWdb8MVuu0u+nG cXe5pmVWz4T+7O+g735yQSUb9gu9oSfB3l4dS1a4uBbLc9rOuNlFEWGTp0nThQGEUW hJnkUD3W6WAcipoznJeXMQg27MEEtacpugox01kY= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S368080AbgJ0N4t (ORCPT ); Tue, 27 Oct 2020 09:56:49 -0400 Received: from mail.kernel.org ([198.145.29.99]:43168 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2409498AbgJ0N4s (ORCPT ); Tue, 27 Oct 2020 09:56:48 -0400 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 8426B2074B; Tue, 27 Oct 2020 13:56:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603807008; bh=qgUX3f/77l+kJcrhCAy7kvXCnEBpZGlcbMssYFrBj94=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=QfkAZ4oeTQnD/+ubNwq0WyGCsp6gmjGLE2Eu7FD5W3ZIePhbaC3YIvtXDpfbT+5kf ziqYBI7O/UIeppGToi5Wkfui5eUHeLI8+FrwhBDsEuiq8kD5VFEn8lJ3pNkA72VPC8 uHnBt3mU+Gkp2Dbm+BIca6d1am87uMLIRYT5/t8U= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, David Wilder , Thomas Falcon , Cristobal Forno , Pradeep Satyanarayana , Willem de Bruijn , Jakub Kicinski Subject: [PATCH 4.4 001/112] ibmveth: Identify ingress large send packets. Date: Tue, 27 Oct 2020 14:48:31 +0100 Message-Id: <20201027134900.605113424@linuxfoundation.org> X-Mailer: git-send-email 2.29.1 In-Reply-To: <20201027134900.532249571@linuxfoundation.org> References: <20201027134900.532249571@linuxfoundation.org> User-Agent: quilt/0.66 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: David Wilder [ Upstream commit 413f142cc05cb03f2d1ea83388e40c1ddc0d74e9 ] Ingress large send packets are identified by either: The IBMVETH_RXQ_LRG_PKT flag in the receive buffer or with a -1 placed in the ip header checksum. The method used depends on firmware version. Frame geometry and sufficient header validation is performed by the hypervisor eliminating the need for further header checks here. Fixes: 7b5967389f5a ("ibmveth: set correct gso_size and gso_type") Signed-off-by: David Wilder Reviewed-by: Thomas Falcon Reviewed-by: Cristobal Forno Reviewed-by: Pradeep Satyanarayana Acked-by: Willem de Bruijn Signed-off-by: Jakub Kicinski Signed-off-by: Greg Kroah-Hartman --- drivers/net/ethernet/ibm/ibmveth.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) --- a/drivers/net/ethernet/ibm/ibmveth.c +++ b/drivers/net/ethernet/ibm/ibmveth.c @@ -1254,6 +1254,7 @@ static int ibmveth_poll(struct napi_stru int offset = ibmveth_rxq_frame_offset(adapter); int csum_good = ibmveth_rxq_csum_good(adapter); int lrg_pkt = ibmveth_rxq_large_packet(adapter); + __sum16 iph_check = 0; skb = ibmveth_rxq_get_buffer(adapter); @@ -1305,7 +1306,17 @@ static int ibmveth_poll(struct napi_stru } } - if (length > netdev->mtu + ETH_HLEN) { + /* PHYP without PLSO support places a -1 in the ip + * checksum for large send frames. + */ + if (skb->protocol == cpu_to_be16(ETH_P_IP)) { + struct iphdr *iph = (struct iphdr *)skb->data; + + iph_check = iph->check; + } + + if ((length > netdev->mtu + ETH_HLEN) || + lrg_pkt || iph_check == 0xffff) { ibmveth_rx_mss_helper(skb, mss, lrg_pkt); adapter->rx_large_packets++; }