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net/virtio: fix dev_unplug_pending 

.dev_unplug_pending is set up by virtio-net code indepent of failover
support was set for the device or not. This gives a wrong result when
we check for existing primary devices in migration code.

Fix this by actually calling dev_unplug_pending() instead of just
checking if the function pointer was set. When the feature was not
negotiated dev_unplug_pending() will always return false. This prevents
us from going into the wait-unplug state when there's no primary device
present.

Fixes: 9711cd0dfc ("net/virtio: add failover support")
Signed-off-by: Jens Freimann <jfreimann@redhat.com>
Reported-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
This commit is contained in:
Jens Freimann 2019-11-20 16:49:48 +01:00 committed by Jason Wang
parent 122e6d2a9c
commit 284f42a520
2 changed files with 5 additions and 1 deletions
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3
hw/net/virtio-net.c
View File

@ -3124,6 +3124,9 @@ static bool primary_unplug_pending(void *opaque)
VirtIODevice *vdev = VIRTIO_DEVICE(dev);
VirtIONet *n = VIRTIO_NET(vdev);
if (!virtio_vdev_has_feature(vdev, VIRTIO_NET_F_STANDBY)) {
return false;
}
return n->primary_dev ? n->primary_dev->pending_deleted_event : false;
}

3
migration/savevm.c
View File

@ -1119,7 +1119,8 @@ int qemu_savevm_nr_failover_devices(void)
int n = 0;
QTAILQ_FOREACH(se, &savevm_state.handlers, entry) {
if (se->vmsd && se->vmsd->dev_unplug_pending) {
if (se->vmsd && se->vmsd->dev_unplug_pending &&
se->vmsd->dev_unplug_pending(se->opaque)) {
n++;
}
}