From nobody Sat Feb 7 17:47:43 2026 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (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 9E5D613AD06 for ; Wed, 14 Aug 2024 05:23:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723612993; cv=none; b=VI0hSJZEX89bF9XTtW/mK/6tqoZcgZbjEjkfF/zia0PnZxNh5LhSGe3Ti4HfXtdLsSrgcWHvU0i+ZhNu6CPiNrfZXaqjhUzF29n26WM9iGht0LImgSMdfkLRfSYVGdGDU5JkprfwQUV9CFX6ct78Nf8NE0ytTkWIvvxgDEMh4zo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723612993; c=relaxed/simple; bh=2qO3/mJ6P9Nef+OP/1gOi/t75B8HWBjlXkRxNiowBd4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Bz1UdPkoXiUOve133Gq3T4+Z0fMYCm/1LtJg8hm7L9i1l0O5UYtPDznZGYtPEqGJ15JJMMfxpshgL6rHkLl60MJg6lHETI8s2uMvAfxgsSu8XsE/K62hDTiwKcPwwqhoRkkn5pGydP/Yt4VuoCWxATzmEDtpdoB5lf0690KQJww= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=EaBKXImG; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="EaBKXImG" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1723612990; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=ZLjGj5KMSOcE6ezWq4vV8uPfzcqpjpDb831kARcqg9Q=; b=EaBKXImGLn4OPF24vNvElEVq6L+m7VdoGUSvl/MrnlekwnMTVDHos0YQdlNZP7gDACnVvz Igtic87pkMsBQzK4u4MKvc7QopvXk6iGAynTD6lYul4MuH1lXrJx2JiCZxNDhHvI2GhFYw 0z2fHCGjBPbtg2jl4jS9HMw43nzE+RU= Received: from mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-491--dp6ZLcvNyqi9oKKMT95NQ-1; Wed, 14 Aug 2024 01:23:03 -0400 X-MC-Unique: -dp6ZLcvNyqi9oKKMT95NQ-1 Received: from mx-prod-int-02.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-02.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.15]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 586071944F06; Wed, 14 Aug 2024 05:23:02 +0000 (UTC) Received: from localhost.localdomain (unknown [10.72.112.38]) by mx-prod-int-02.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 9CF081944A95; Wed, 14 Aug 2024 05:22:55 +0000 (UTC) From: Jason Wang To: mst@redhat.com, jasowang@redhat.com, xuanzhuo@linux.alibaba.com, eperezma@redhat.com, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com Cc: virtualization@lists.linux.dev, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, venkat.x.venkatsubra@oracle.com, gia-khanh.nguyen@oracle.com Subject: [PATCH net-next v7 3/4] virtio-net: synchronize operstate with admin state on up/down Date: Wed, 14 Aug 2024 13:22:27 +0800 Message-ID: <20240814052228.4654-4-jasowang@redhat.com> In-Reply-To: <20240814052228.4654-1-jasowang@redhat.com> References: <20240814052228.4654-1-jasowang@redhat.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.0 on 10.30.177.15 Content-Type: text/plain; charset="utf-8" This patch synchronizes operstate with admin state per RFC2863. This is done by trying to toggle the carrier upon open/close and synchronize with the config change work. This allows to propagate status correctly to stacked devices like: ip link add link enp0s3 macvlan0 type macvlan ip link set link enp0s3 down ip link show Before this patch: 3: enp0s3: mtu 1500 qdisc pfifo_fast state DOWN mode = DEFAULT group default qlen 1000 link/ether 00:00:05:00:00:09 brd ff:ff:ff:ff:ff:ff ...... 5: macvlan0@enp0s3: mtu 1500 qdisc= noqueue state UP mode DEFAULT group default qlen 1000 link/ether b2:a9:c5:04:da:53 brd ff:ff:ff:ff:ff:ff After this patch: 3: enp0s3: mtu 1500 qdisc pfifo_fast state DOWN mode = DEFAULT group default qlen 1000 link/ether 00:00:05:00:00:09 brd ff:ff:ff:ff:ff:ff ... 5: macvlan0@enp0s3: mtu 1500 qdi= sc noqueue state LOWERLAYERDOWN mode DEFAULT group default qlen 1000 link/ether b2:a9:c5:04:da:53 brd ff:ff:ff:ff:ff:ff Cc: Venkat Venkatsubra Cc: Gia-Khanh Nguyen Acked-by: Michael S. Tsirkin Signed-off-by: Jason Wang --- drivers/net/virtio_net.c | 78 +++++++++++++++++++++++++--------------- 1 file changed, 50 insertions(+), 28 deletions(-) diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index 3f10c72743e9..55b712a71e63 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -2885,6 +2885,25 @@ static void virtnet_cancel_dim(struct virtnet_info *= vi, struct dim *dim) net_dim_work_cancel(dim); } =20 +static void virtnet_update_settings(struct virtnet_info *vi) +{ + u32 speed; + u8 duplex; + + if (!virtio_has_feature(vi->vdev, VIRTIO_NET_F_SPEED_DUPLEX)) + return; + + virtio_cread_le(vi->vdev, struct virtio_net_config, speed, &speed); + + if (ethtool_validate_speed(speed)) + vi->speed =3D speed; + + virtio_cread_le(vi->vdev, struct virtio_net_config, duplex, &duplex); + + if (ethtool_validate_duplex(duplex)) + vi->duplex =3D duplex; +} + static int virtnet_open(struct net_device *dev) { struct virtnet_info *vi =3D netdev_priv(dev); @@ -2903,6 +2922,15 @@ static int virtnet_open(struct net_device *dev) goto err_enable_qp; } =20 + if (virtio_has_feature(vi->vdev, VIRTIO_NET_F_STATUS)) { + if (vi->status & VIRTIO_NET_S_LINK_UP) + netif_carrier_on(vi->dev); + virtio_config_driver_enable(vi->vdev); + } else { + vi->status =3D VIRTIO_NET_S_LINK_UP; + netif_carrier_on(dev); + } + return 0; =20 err_enable_qp: @@ -3381,12 +3409,22 @@ static int virtnet_close(struct net_device *dev) disable_delayed_refill(vi); /* Make sure refill_work doesn't re-enable napi! */ cancel_delayed_work_sync(&vi->refill); + /* Prevent the config change callback from changing carrier + * after close + */ + virtio_config_driver_disable(vi->vdev); + /* Stop getting status/speed updates: we don't care until next + * open + */ + cancel_work_sync(&vi->config_work); =20 for (i =3D 0; i < vi->max_queue_pairs; i++) { virtnet_disable_queue_pair(vi, i); virtnet_cancel_dim(vi, &vi->rq[i].dim); } =20 + netif_carrier_off(dev); + return 0; } =20 @@ -5095,25 +5133,6 @@ static void virtnet_init_settings(struct net_device = *dev) vi->duplex =3D DUPLEX_UNKNOWN; } =20 -static void virtnet_update_settings(struct virtnet_info *vi) -{ - u32 speed; - u8 duplex; - - if (!virtio_has_feature(vi->vdev, VIRTIO_NET_F_SPEED_DUPLEX)) - return; - - virtio_cread_le(vi->vdev, struct virtio_net_config, speed, &speed); - - if (ethtool_validate_speed(speed)) - vi->speed =3D speed; - - virtio_cread_le(vi->vdev, struct virtio_net_config, duplex, &duplex); - - if (ethtool_validate_duplex(duplex)) - vi->duplex =3D duplex; -} - static u32 virtnet_get_rxfh_key_size(struct net_device *dev) { return ((struct virtnet_info *)netdev_priv(dev))->rss_key_size; @@ -6524,6 +6543,9 @@ static int virtnet_probe(struct virtio_device *vdev) goto free_failover; } =20 + /* Disable config change notification until ndo_open. */ + virtio_config_driver_disable(vi->vdev); + virtio_device_ready(vdev); =20 virtnet_set_queues(vi, vi->curr_queue_pairs); @@ -6573,25 +6595,25 @@ static int virtnet_probe(struct virtio_device *vdev) vi->device_stats_cap =3D le64_to_cpu(v); } =20 - rtnl_unlock(); - - err =3D virtnet_cpu_notif_add(vi); - if (err) { - pr_debug("virtio_net: registering cpu notifier failed\n"); - goto free_unregister_netdev; - } - /* Assume link up if device can't report link status, otherwise get link status from config. */ netif_carrier_off(dev); if (virtio_has_feature(vi->vdev, VIRTIO_NET_F_STATUS)) { - schedule_work(&vi->config_work); + virtnet_config_changed_work(&vi->config_work); } else { vi->status =3D VIRTIO_NET_S_LINK_UP; virtnet_update_settings(vi); netif_carrier_on(dev); } =20 + rtnl_unlock(); + + err =3D virtnet_cpu_notif_add(vi); + if (err) { + pr_debug("virtio_net: registering cpu notifier failed\n"); + goto free_unregister_netdev; + } + for (i =3D 0; i < ARRAY_SIZE(guest_offloads); i++) if (virtio_has_feature(vi->vdev, guest_offloads[i])) set_bit(guest_offloads[i], &vi->guest_offloads); --=20 2.31.1