From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (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 7E6D01EB487 for ; Thu, 1 Aug 2024 06:06:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722492373; cv=none; b=Eued1A7iuloTnFY/I6A9FNnaXYIv46gQA45YuNV0rbsqAqwY1eamFLdIecBXOlmsmYMHoQkjH0K7SD5wdb3wT/Z/ERKR5BAWM+HZwWXdHWiPLO1hq/TvgIztDUoKf9r3CD++TGVHyr5B+5z+Nzm/vmhs6XcmhkR6wroPHHPLFes= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722492373; c=relaxed/simple; bh=MoJr4mGPo2emWOdduc6Ewmz4RQQEWee+Ztqd4CfE9Nc=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: In-Reply-To:Content-Type:Content-Disposition; b=QQz9q8MHuUbUT4865l5RudTRgCTxbt68g10EvwUEyhABuUi0aeIAQUuirphHtXsra4d9fdiUHZWw/x65uLkArbm2fjOW/JKM/DQIUN/dCj2fx4tDd4E3aFZJKkGRRmEQ+TncGSZ936P3SRcKchNZ+FWov/TpcGjaodqGxr5f0tM= 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=NTJY9YdF; arc=none smtp.client-ip=170.10.133.124 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="NTJY9YdF" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1722492370; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=oXvVrXEs7imKq8lxNZGkuvPb2Qi8cRn244ngd84DYZs=; b=NTJY9YdFaOiyQZGBlw1E0jIkJq0R0PjYgLcR3cMG0AG9VWnzLmYkEFPXOGR0i/pDjRDwM7 /u7gBIFu82q61a6OF6VidOtxpYjaUBXklc3cJvKZWot7pWZdSvjknofplZdcjMO7QvrLFx hr7vDOkFymUC5xIEQdobAzEnJuxyv+0= Received: from mail-lj1-f199.google.com (mail-lj1-f199.google.com [209.85.208.199]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-282-ct7ACkozOvGMXFs5wckMBA-1; Thu, 01 Aug 2024 02:06:09 -0400 X-MC-Unique: ct7ACkozOvGMXFs5wckMBA-1 Received: by mail-lj1-f199.google.com with SMTP id 38308e7fff4ca-2ef3157ae4cso68672741fa.2 for ; Wed, 31 Jul 2024 23:06:08 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1722492367; x=1723097167; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=oXvVrXEs7imKq8lxNZGkuvPb2Qi8cRn244ngd84DYZs=; b=hz+s3og65BlpEGr0+qlLu2hf6EiYK/XiNMsyKAx9iAfyW6g5hZIMFolu4S/L7SmXZW /b0tsXOnRBK64lgudTtVNK3OyN2R4BJM3Idd9tsB6ARMPJlkZHH36UBXqwY8f6+NY9VE eUMVLl7eXfrO6n+FNKiy5VH4eHUC0fODOsqc9kH5Ga4mN+k0olOCjbCKoTa2bAsLPlvD 0FeZXBWMAj7PK3XudjA4+reeDhTaXNWUqjhf5ucCcfF3COMkols/5Np0Gooie/wqZyRa z7R6WDBwWjpN0fbfAI3zLNVvRwXBI2dfsP9iuFYn1MyLYFCOXzXYq0h8OItQ0z3ac8+I 9LwQ== X-Forwarded-Encrypted: i=1; AJvYcCX/bEhSyDbSrGIf6MM6RSIOPWt0CzILl6Fe6dCRhvcAyQU5AaKMeJPZk5Qhqh68slMeHHfH5Kq0T4l6i209Ovsvvw/as1dABAFce8uotzw= X-Gm-Message-State: AOJu0YzwKQmt7e0okbdSvx3KFXeTRZqC+W8Pmh+guQu3SyqX2rgIMVb0 ABcBqs7Y/F2zdKpHtdfD41AVU89BbLZd3nPmPNMLIvpTlOvm2exVkIMCzrhqzfxizQ/C6JX7x2w g+vE0AV8bX9iTvMJLjms+9ax8O9vk7KJVA1LkgRFYpZa7fVhdciulhwaUrz5ZLluh X-Received: by 2002:a2e:9e44:0:b0:2ef:32bb:5368 with SMTP id 38308e7fff4ca-2f1530ea1e2mr11451371fa.11.1722492367213; Wed, 31 Jul 2024 23:06:07 -0700 (PDT) X-Google-Smtp-Source: AGHT+IHM9ZyKL75V6GO6PtO5RhoimbEdBrF+GHnf8Kpa6aPVDLn3MkQr2Rf9oSzR7icep3N5IacJHQ== X-Received: by 2002:a2e:9e44:0:b0:2ef:32bb:5368 with SMTP id 38308e7fff4ca-2f1530ea1e2mr11450881fa.11.1722492366305; Wed, 31 Jul 2024 23:06:06 -0700 (PDT) Received: from redhat.com ([2.55.14.19]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a7acad41027sm845472466b.122.2024.07.31.23.06.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 31 Jul 2024 23:06:04 -0700 (PDT) Date: Thu, 1 Aug 2024 02:05:54 -0400 From: "Michael S. Tsirkin" To: Jason Wang Cc: xuanzhuo@linux.alibaba.com, eperezma@redhat.com, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, virtualization@lists.linux.dev, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Venkat Venkatsubra , Gia-Khanh Nguyen Subject: Re: [PATCH V4 net-next 3/3] virtio-net: synchronize operstate with admin state on up/down Message-ID: <20240801015914-mutt-send-email-mst@kernel.org> References: <20240731025947.23157-1-jasowang@redhat.com> <20240731025947.23157-4-jasowang@redhat.com> Precedence: bulk X-Mailing-List: virtualization@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 In-Reply-To: <20240731025947.23157-4-jasowang@redhat.com> X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Wed, Jul 31, 2024 at 10:59:47AM +0800, Jason Wang wrote: > This patch synchronize 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 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 qdisc 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 > Signed-off-by: Jason Wang > --- > drivers/net/virtio_net.c | 84 ++++++++++++++++++++++++++-------------- > 1 file changed, 54 insertions(+), 30 deletions(-) > > diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c > index 0383a3e136d6..0cb93261eba1 100644 > --- a/drivers/net/virtio_net.c > +++ b/drivers/net/virtio_net.c > @@ -2878,6 +2878,7 @@ static int virtnet_enable_queue_pair(struct virtnet_info *vi, int qp_index) > return err; > } > > + > static void virtnet_cancel_dim(struct virtnet_info *vi, struct dim *dim) > { > if (!virtio_has_feature(vi->vdev, VIRTIO_NET_F_VQ_NOTF_COAL)) > @@ -2885,6 +2886,25 @@ static void virtnet_cancel_dim(struct virtnet_info *vi, struct dim *dim) > net_dim_work_cancel(dim); > } > > +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 = speed; > + > + virtio_cread_le(vi->vdev, struct virtio_net_config, duplex, &duplex); > + > + if (ethtool_validate_duplex(duplex)) > + vi->duplex = duplex; > +} > + > static int virtnet_open(struct net_device *dev) > { > struct virtnet_info *vi = netdev_priv(dev); > @@ -2903,6 +2923,16 @@ static int virtnet_open(struct net_device *dev) > goto err_enable_qp; > } > > + 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 = VIRTIO_NET_S_LINK_UP; > + netif_carrier_on(dev); > + virtnet_update_settings(vi); > + } > + > return 0; > > err_enable_qp: > @@ -3381,12 +3411,18 @@ 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); > + /* Make sure config notification doesn't schedule config work */ > + virtio_config_driver_disable(vi->vdev); > + /* Make sure status updating is cancelled */ > + cancel_work_sync(&vi->config_work); > > for (i = 0; i < vi->max_queue_pairs; i++) { > virtnet_disable_queue_pair(vi, i); > virtnet_cancel_dim(vi, &vi->rq[i].dim); > } > > + netif_carrier_off(dev); > + > return 0; > } > > @@ -5085,25 +5121,6 @@ static void virtnet_init_settings(struct net_device *dev) > vi->duplex = DUPLEX_UNKNOWN; > } > > -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 = speed; > - > - virtio_cread_le(vi->vdev, struct virtio_net_config, duplex, &duplex); > - > - if (ethtool_validate_duplex(duplex)) > - vi->duplex = duplex; > -} > - > static u32 virtnet_get_rxfh_key_size(struct net_device *dev) > { > return ((struct virtnet_info *)netdev_priv(dev))->rss_key_size; > @@ -6514,6 +6531,11 @@ static int virtnet_probe(struct virtio_device *vdev) > goto free_failover; > } > > + /* Forbid config change notification until ndo_open. */ > + virtio_config_driver_disable(vi->vdev); > + /* Make sure status updating work is done */ Wait a second, how can anything run here, this is probe, config change callbacks are never invoked at all. > + cancel_work_sync(&vi->config_work); > + this is pointless, too. > virtio_device_ready(vdev); > > virtnet_set_queues(vi, vi->curr_queue_pairs); > @@ -6563,6 +6585,19 @@ static int virtnet_probe(struct virtio_device *vdev) > vi->device_stats_cap = le64_to_cpu(v); > } > > + /* 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)) { > + /* This is safe as config notification change has been > + disabled. */ What "this"? pls explain what this does: get config data from device. Actually not because it was disabled. probe can poke at config with impunity no change callbacks trigger during probe. > + virtnet_config_changed_work(&vi->config_work); > + } else { > + vi->status = VIRTIO_NET_S_LINK_UP; > + virtnet_update_settings(vi); > + netif_carrier_on(dev); > + } > + > rtnl_unlock(); > > err = virtnet_cpu_notif_add(vi); > @@ -6571,17 +6606,6 @@ static int virtnet_probe(struct virtio_device *vdev) > 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); > - } else { > - vi->status = VIRTIO_NET_S_LINK_UP; > - virtnet_update_settings(vi); > - netif_carrier_on(dev); > - } > - > for (i = 0; i < ARRAY_SIZE(guest_offloads); i++) > if (virtio_has_feature(vi->vdev, guest_offloads[i])) > set_bit(guest_offloads[i], &vi->guest_offloads); > -- > 2.31.1