From: Jason Wang <jasowang@redhat.com>
To: Kangjie Xu <kangjie.xu@linux.alibaba.com>, qemu-devel@nongnu.org
Cc: mst@redhat.com, eduardo@habkost.net, marcel.apfelbaum@gmail.com,
f4bug@amsat.org, wangyanan55@huawei.com,
hengqi@linux.alibaba.com, xuanzhuo@linux.alibaba.com
Subject: Re: [PATCH v3 13/15] virtio-net: support queue reset
Date: Mon, 5 Sep 2022 16:30:38 +0800 [thread overview]
Message-ID: <8e7c93bc-2430-f0fb-d425-5e43fde23c14@redhat.com> (raw)
In-Reply-To: <8577963f4b72f30c5dd1adfe661b08e57d26c453.1661414345.git.kangjie.xu@linux.alibaba.com>
在 2022/8/25 16:08, Kangjie Xu 写道:
> From: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
>
> virtio-net and vhost-kernel implement queue reset.
> Queued packets in the corresponding queue pair are flushed
> or purged.
>
> Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
> Signed-off-by: Kangjie Xu <kangjie.xu@linux.alibaba.com>
> ---
> hw/net/virtio-net.c | 18 ++++++++++++++++++
> 1 file changed, 18 insertions(+)
>
> diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c
> index 27b59c0ad6..d774a3e652 100644
> --- a/hw/net/virtio-net.c
> +++ b/hw/net/virtio-net.c
> @@ -540,6 +540,23 @@ static RxFilterInfo *virtio_net_query_rxfilter(NetClientState *nc)
> return info;
> }
>
> +static void virtio_net_queue_reset(VirtIODevice *vdev, uint32_t queue_index)
> +{
> + VirtIONet *n = VIRTIO_NET(vdev);
> + NetClientState *nc = qemu_get_subqueue(n->nic, vq2q(queue_index));
> +
> + if (!nc->peer) {
> + return;
> + }
> +
> + if (get_vhost_net(nc->peer) &&
> + nc->peer->info->type == NET_CLIENT_DRIVER_TAP) {
> + vhost_net_virtqueue_reset(vdev, nc, queue_index);
> + }
> +
> + flush_or_purge_queued_packets(nc);
But the codes doesn't prevent the usersapce datapath from being used?
(e.g vhost=off)
E.g vhost_net_start_one() had:
if (net->nc->info->poll) {
net->nc->info->poll(net->nc, false);
}
And I will wonder if it's better to consider to:
1) factor out the per virtqueue start/stop from vhost_net_start/stop_one()
2) simply use the helper factored out via step 1)
Thanks
> +}
> +
> static void virtio_net_reset(VirtIODevice *vdev)
> {
> VirtIONet *n = VIRTIO_NET(vdev);
> @@ -3784,6 +3801,7 @@ static void virtio_net_class_init(ObjectClass *klass, void *data)
> vdc->set_features = virtio_net_set_features;
> vdc->bad_features = virtio_net_bad_features;
> vdc->reset = virtio_net_reset;
> + vdc->queue_reset = virtio_net_queue_reset;
> vdc->set_status = virtio_net_set_status;
> vdc->guest_notifier_mask = virtio_net_guest_notifier_mask;
> vdc->guest_notifier_pending = virtio_net_guest_notifier_pending;
next prev parent reply other threads:[~2022-09-05 8:33 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-25 8:08 [PATCH v3 00/15] Support VIRTIO_F_RING_RESET for virtio-net, vhost-net kernel in virtio pci-modern Kangjie Xu
2022-08-25 8:08 ` [PATCH v3 01/15] virtio: sync relevant definitions with linux Kangjie Xu
2022-09-05 4:56 ` Jason Wang
2022-08-25 8:08 ` [PATCH v3 02/15] virtio: introduce __virtio_queue_reset() Kangjie Xu
2022-08-25 8:08 ` [PATCH v3 03/15] virtio: introduce virtio_queue_reset() Kangjie Xu
2022-08-25 8:08 ` [PATCH v3 04/15] virtio: introduce virtio_queue_enable() Kangjie Xu
2022-08-25 8:08 ` [PATCH v3 05/15] virtio: core: vq reset feature negotation support Kangjie Xu
2022-08-25 8:08 ` [PATCH v3 06/15] virtio-pci: support queue reset Kangjie Xu
2022-09-05 7:59 ` Jason Wang
2022-08-25 8:08 ` [PATCH v3 07/15] virtio-pci: support queue enable Kangjie Xu
2022-09-05 8:00 ` Jason Wang
2022-08-25 8:08 ` [PATCH v3 08/15] vhost: extract the logic of unmapping the vrings and desc Kangjie Xu
2022-08-25 8:08 ` [PATCH v3 09/15] vhost: expose vhost_virtqueue_start() Kangjie Xu
2022-08-25 8:08 ` [PATCH v3 10/15] vhost-net: vhost-kernel: introduce vhost_net_virtqueue_reset() Kangjie Xu
2022-09-05 8:03 ` Jason Wang
2022-09-05 10:15 ` Kangjie Xu
2022-09-06 5:24 ` Jason Wang
2022-08-25 8:08 ` [PATCH v3 11/15] vhost-net: vhost-kernel: introduce vhost_net_virtqueue_restart() Kangjie Xu
2022-09-05 8:24 ` Jason Wang
2022-09-05 10:21 ` Kangjie Xu
2022-08-25 8:08 ` [PATCH v3 12/15] virtio-net: introduce flush_or_purge_queued_packets() Kangjie Xu
2022-09-05 8:25 ` Jason Wang
2022-08-25 8:08 ` [PATCH v3 13/15] virtio-net: support queue reset Kangjie Xu
2022-09-05 8:30 ` Jason Wang [this message]
2022-09-05 10:25 ` Kangjie Xu
2022-09-05 16:25 ` Kangjie Xu
2022-09-06 5:37 ` Jason Wang
2022-09-06 3:14 ` Kangjie Xu
2022-08-25 8:08 ` [PATCH v3 14/15] virtio-net: support queue_enable Kangjie Xu
2022-08-25 8:08 ` [PATCH v3 15/15] vhost: vhost-kernel: enable vq reset feature Kangjie Xu
2022-09-02 1:04 ` [PATCH v3 00/15] Support VIRTIO_F_RING_RESET for virtio-net, vhost-net kernel in virtio pci-modern Kangjie Xu
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