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vhost: disable on tap link down

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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>
Acked-by: Alex Williamson <alex.williamson@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Michael S. Tsirkin 2011-02-09 18:45:09 +02:00 • committed by Aurelien Jarno
parent ab1cbe1c6d
commit 3299369856
1 changed files with 2 additions and 1 deletions
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3
hw/virtio-net.c
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@ -115,7 +115,8 @@ static void virtio_net_vhost_status(VirtIONet *n, uint8_t status)
if (!tap_get_vhost_net(n->nic->nc.peer)) {
return;
}
if (!!n->vhost_started == virtio_net_started(n, status)) {
if (!!n->vhost_started == virtio_net_started(n, status) &&
!n->nic->nc.peer->link_down) {
return;
}
if (!n->vhost_started) {