From patchwork Wed Sep 30 02:03:00 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tonghao Zhang X-Patchwork-Id: 1374026 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20161025 header.b=rfEZt0Es; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4C1KNd5jpVz9sSG for ; Wed, 30 Sep 2020 12:05:53 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729722AbgI3CFx (ORCPT ); Tue, 29 Sep 2020 22:05:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59906 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729322AbgI3CFw (ORCPT ); Tue, 29 Sep 2020 22:05:52 -0400 Received: from mail-oi1-x241.google.com (mail-oi1-x241.google.com [IPv6:2607:f8b0:4864:20::241]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 785DAC061755 for ; Tue, 29 Sep 2020 19:05:52 -0700 (PDT) Received: by mail-oi1-x241.google.com with SMTP id i17so7791442oig.10 for ; Tue, 29 Sep 2020 19:05:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id; bh=T0BMwdFvGafs3VXiDpg3UXiEW7pVRzc87P0d5q2TBSw=; b=rfEZt0EsfLeVlfr9Y0EFVsMkwVoZFtSaiWgPoSMR5Dys3AV0XJL8/J1SfbklZQVJO1 4zLaaNyWrlO/LRAvMA783bjwht+c7XqGXmvbNW6MKrdaLJqiHV/YNGF+/PH+5Dj5uo3J 74P3n7Aj+Ujms6lYPMC0Ifw9/L5QKSxCfZhnAbCFtflQ6vj5LUqdLjIzzVteJlg+Ccv3 B+2ZAclsEFM+pYbHpmtnufGceNqajMB9KkKghdAJqBHhNbNKtH6lquHUI4FwoVb6M7hR QaqiV3RSt76Y4erhWW0bk/IuvHaS4zXP+ZSrfGXnuq0+I4rQRV1emyMdnf5XHsfGWsdi p6XQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id; bh=T0BMwdFvGafs3VXiDpg3UXiEW7pVRzc87P0d5q2TBSw=; b=shXoDRL+RjPwTA75yDeSvi0bh6deE0cTxCzbfDBvxg6zj8LSA1MqoJGV0h0fd37yk5 43QW9kMNRyHRw6mhgs92vfAXCHPeZAClPWo/eNrnB+ybfTS6ODgaNeMo1n50eRjqAYKU YAr0H5t1JSPaN8jwOilCLHkxOaR+BQOqGlkJ5lemmQeGcEFlbqKXqSLkaTpAhk+zBToy txR4iZ+EjEFpL4rS8WhqqG8J9acDfVXAh75PPGrSxOUiZCrFhkygn5A/a+C22GnaQGHi gcYJJtnnBRM5NNTqg2LsXBMd7Ypf4HQl/en4sjB31ubE79zTyrFQS2J36pW3zFrMBYc0 F96g== X-Gm-Message-State: AOAM533LgdRqb1C/nzRV4E32kbPa20bt+4XN00QDt+AbwPF4nYAq1VIU cX1urm4FqdzZWPsFDXn41tw= X-Google-Smtp-Source: ABdhPJwDBP1sGpK+4M36t3OTguXYgxpsLNwX0xpGzwSB2+d7eRx4I7S1neyDWbXiG5hKIHBhmo0m5g== X-Received: by 2002:aca:913:: with SMTP id 19mr189541oij.169.1601431551697; Tue, 29 Sep 2020 19:05:51 -0700 (PDT) Received: from localhost.localdomain ([50.236.19.102]) by smtp.gmail.com with ESMTPSA id n186sm28043oob.11.2020.09.29.19.05.45 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Tue, 29 Sep 2020 19:05:50 -0700 (PDT) From: xiangxia.m.yue@gmail.com To: jasowang@redhat.com, mst@redhat.com Cc: virtualization@lists.linux-foundation.org, netdev@vger.kernel.org, Tonghao Zhang Subject: [PATCH net-next v2] virtio-net: ethtool configurable RXCSUM Date: Wed, 30 Sep 2020 10:03:00 +0800 Message-Id: <20200930020300.62245-1-xiangxia.m.yue@gmail.com> X-Mailer: git-send-email 2.15.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Tonghao Zhang Allow user configuring RXCSUM separately with ethtool -K, reusing the existing virtnet_set_guest_offloads helper that configures RXCSUM for XDP. This is conditional on VIRTIO_NET_F_CTRL_GUEST_OFFLOADS. If Rx checksum is disabled, LRO should also be disabled. Cc: Michael S. Tsirkin Cc: Jason Wang Signed-off-by: Tonghao Zhang Acked-by: Michael S. Tsirkin --- v2: * LRO depends the rx csum * remove the unnecessary check --- drivers/net/virtio_net.c | 49 ++++++++++++++++++++++++++++++---------- 1 file changed, 37 insertions(+), 12 deletions(-) diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index 21b71148c532..5407a0106771 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -68,6 +68,8 @@ static const unsigned long guest_offloads[] = { (1ULL << VIRTIO_NET_F_GUEST_ECN) | \ (1ULL << VIRTIO_NET_F_GUEST_UFO)) +#define GUEST_OFFLOAD_CSUM_MASK (1ULL << VIRTIO_NET_F_GUEST_CSUM) + struct virtnet_stat_desc { char desc[ETH_GSTRING_LEN]; size_t offset; @@ -2522,29 +2524,49 @@ static int virtnet_get_phys_port_name(struct net_device *dev, char *buf, return 0; } +static netdev_features_t virtnet_fix_features(struct net_device *netdev, + netdev_features_t features) +{ + /* If Rx checksum is disabled, LRO should also be disabled. + * That is life. :) + */ + if (!(features & NETIF_F_RXCSUM)) + features &= ~NETIF_F_LRO; + + return features; +} + static int virtnet_set_features(struct net_device *dev, netdev_features_t features) { struct virtnet_info *vi = netdev_priv(dev); - u64 offloads; + u64 offloads = vi->guest_offloads & + vi->guest_offloads_capable; int err; - if ((dev->features ^ features) & NETIF_F_LRO) { - if (vi->xdp_queue_pairs) - return -EBUSY; + /* Don't allow configuration while XDP is active. */ + if (vi->xdp_queue_pairs) + return -EBUSY; + if ((dev->features ^ features) & NETIF_F_LRO) { if (features & NETIF_F_LRO) - offloads = vi->guest_offloads_capable; + offloads |= GUEST_OFFLOAD_LRO_MASK; else - offloads = vi->guest_offloads_capable & - ~GUEST_OFFLOAD_LRO_MASK; + offloads &= ~GUEST_OFFLOAD_LRO_MASK; + } - err = virtnet_set_guest_offloads(vi, offloads); - if (err) - return err; - vi->guest_offloads = offloads; + if ((dev->features ^ features) & NETIF_F_RXCSUM) { + if (features & NETIF_F_RXCSUM) + offloads |= GUEST_OFFLOAD_CSUM_MASK; + else + offloads &= ~GUEST_OFFLOAD_CSUM_MASK; } + err = virtnet_set_guest_offloads(vi, offloads); + if (err) + return err; + + vi->guest_offloads = offloads; return 0; } @@ -2563,6 +2585,7 @@ static const struct net_device_ops virtnet_netdev = { .ndo_features_check = passthru_features_check, .ndo_get_phys_port_name = virtnet_get_phys_port_name, .ndo_set_features = virtnet_set_features, + .ndo_fix_features = virtnet_fix_features, }; static void virtnet_config_changed_work(struct work_struct *work) @@ -3013,8 +3036,10 @@ static int virtnet_probe(struct virtio_device *vdev) if (virtio_has_feature(vdev, VIRTIO_NET_F_GUEST_TSO4) || virtio_has_feature(vdev, VIRTIO_NET_F_GUEST_TSO6)) dev->features |= NETIF_F_LRO; - if (virtio_has_feature(vdev, VIRTIO_NET_F_CTRL_GUEST_OFFLOADS)) + if (virtio_has_feature(vdev, VIRTIO_NET_F_CTRL_GUEST_OFFLOADS)) { + dev->hw_features |= NETIF_F_RXCSUM; dev->hw_features |= NETIF_F_LRO; + } dev->vlan_features = dev->features;