From 177cf101561ec0a687c8691be578ea03afe23907 Mon Sep 17 00:00:00 2001
From: Michael S. Tsirkin <mst@redhat.com>
Date: Wed, 9 Feb 2011 14:41:00 -0200
Subject: [PATCH 04/10] vhost: disable on tap link down
RH-Author: Michael S. Tsirkin <mst@redhat.com>
Message-id: <747c489b9712a21e8862b3eff7c147d626d94998.1297262374.git.mst@redhat.com>
Patchwork-id: 17908
O-Subject: [PATCHv2 RHEL6.1 2/2] vhost: disable on tap link down
Bugzilla: 676015
RH-Acked-by: Xiao Wang <jasowang@redhat.com>
RH-Acked-by: Glauber Costa <glommer@redhat.com>
RH-Acked-by: Alex Williamson <alex.williamson@redhat.com>
qemu makes it possible to disable link at tap
which is not communicated to the guest but
causes all packets to be dropped.
When vhost-net is enabled, vhost needs to be aware of both the virtio
link_down and the peer link_down. we switch to userspace emulation when
either is down.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reported-by: pradeep <psuriset@linux.vnet.ibm.com>
---
hw/virtio-net.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
---
hw/virtio-net.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/hw/virtio-net.c b/hw/virtio-net.c
index 21965a4..72d37f8 100644
--- a/hw/virtio-net.c
+++ b/hw/virtio-net.c
@@ -112,7 +112,8 @@ static void virtio_net_set_status(struct VirtIODevice *vdev, uint8_t status)
}
if (!!n->vhost_started == ((status & VIRTIO_CONFIG_S_DRIVER_OK) &&
(n->status & VIRTIO_NET_S_LINK_UP) &&
- n->vdev.vm_running)) {
+ n->vdev.vm_running &&
+ !n->nic->nc.peer->link_down)) {
return;
}
if (!n->vhost_started) {
--
1.7.4.rc1.16.gd2f15e