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 09D80C388F9 for ; Tue, 27 Oct 2020 14:48:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B6C2C21556 for ; Tue, 27 Oct 2020 14:48:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603810085; bh=6C3FJ3LvU1My+XmqeZi6teM3BQjISoI9g8rwakxn8es=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=erLHFRLpRQwTe2q30IESPpXekBdWs0+2dYcbEAIzxOGAQ6W69t8D2vqkU/tHbb+TT 3AdwTPKPrvatD+sLGGo+4I5vM6y4gqxf+IsaXSUiSib0elCvC0eXaXZeFrnA18UaD7 nZLmMhSJOzfvNdNmPejifIGF08znhjVN31cxQIsk= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1766304AbgJ0OsD (ORCPT ); Tue, 27 Oct 2020 10:48:03 -0400 Received: from mail.kernel.org ([198.145.29.99]:47776 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1766254AbgJ0Orv (ORCPT ); Tue, 27 Oct 2020 10:47:51 -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 6C0A4206E5; Tue, 27 Oct 2020 14:47:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603810071; bh=6C3FJ3LvU1My+XmqeZi6teM3BQjISoI9g8rwakxn8es=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=S/tpcbAVvvWEti4aGJraMnNwIOxQClFBkUb3Lz3vyZoiCf7t1i9gswt7AMC9eVuw9 FdJmz1ARqxLrUf6dka9GS1mrSu2EeKob9hyRU1KjDDzKXTJPo5AOXEFkDCHR/NyTEO nevySau1a4xnrYyNszQTojBdo3a9EMPIp6YV45Bg= 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 5.8 003/633] ibmveth: Identify ingress large send packets. Date: Tue, 27 Oct 2020 14:45:46 +0100 Message-Id: <20201027135522.826721761@linuxfoundation.org> X-Mailer: git-send-email 2.29.1 In-Reply-To: <20201027135522.655719020@linuxfoundation.org> References: <20201027135522.655719020@linuxfoundation.org> User-Agent: quilt/0.66 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 @@ -1349,6 +1349,7 @@ 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); @@ -1385,7 +1386,17 @@ 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++; }