From patchwork Tue Oct 27 13:49:00 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 312926 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=ham 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 4C12DC55178 for ; Tue, 27 Oct 2020 14:30:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F0BE222258 for ; Tue, 27 Oct 2020 14:30:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603809052; bh=f3oZ6lt1048Bbse2Sgh8W9XGTvPRDZB4uRcJs7R8j4g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=CxFB803iaNBaUciwMr6XSTSUnYwKNRbdhQARf/QYSfzcy2joeziON4qiKj96VZYFF BFnzth/PehGS/3RSBJIZBM+h4J90npbzAz82nj4+Oip7fMndRHooJfmO/YvXSzzaHj jehfHToS323cNH4nHnGsTTsinfAY6I1y7wqbBHK8= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760001AbgJ0Oau (ORCPT ); Tue, 27 Oct 2020 10:30:50 -0400 Received: from mail.kernel.org ([198.145.29.99]:55294 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759287AbgJ0O2t (ORCPT ); Tue, 27 Oct 2020 10:28:49 -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 30CE120754; Tue, 27 Oct 2020 14:28:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603808928; bh=f3oZ6lt1048Bbse2Sgh8W9XGTvPRDZB4uRcJs7R8j4g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=DE0e83iJog+EhGbKeL0tTiN0XXV8Adhjw7aziZiCPbKzZs6OawUi4B4mezEn5RcOe 9U3LfAnQza3BXN7u5SoRJJfLILvffNqEG9jvKMMHNUJUKdnsY/axD/sNm8VHSg0QKV vOvOjiaDXQ2IR+uGoVefPVTkd3eqnZCUMcRH+ATo= 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 5.4 002/408] ibmveth: Identify ingress large send packets. Date: Tue, 27 Oct 2020 14:49:00 +0100 Message-Id: <20201027135455.154994986@linuxfoundation.org> X-Mailer: git-send-email 2.29.1 In-Reply-To: <20201027135455.027547757@linuxfoundation.org> References: <20201027135455.027547757@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@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 @@ -1317,6 +1317,7 @@ 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); @@ -1353,7 +1354,17 @@ static int ibmveth_poll(struct napi_stru skb_put(skb, length); skb->protocol = eth_type_trans(skb, netdev); - 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++; }