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net/virtio: fix re-plugging of primary device 

failover_replug_primary was returning true on failure which lead to
re-plug not working when a migration failed.  Fix this by returning
success when hotplug worked.  This is a bug that was missed in last
round of testing but was tested succesfully with this version.  Also
make sure we don't pass NULL to qdev_set_parent_bus().

This fixes CID 1407224.

Fixes: 9711cd0dfc ("net/virtio: add failover support")
Signed-off-by: Jens Freimann <jfreimann@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 16:49:50 +01:00 committed by Jason Wang
parent 117378bf03
commit 150ab54aa6
1 changed files with 25 additions and 17 deletions
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42
hw/net/virtio-net.c
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@ -2805,25 +2805,33 @@ static bool failover_replug_primary(VirtIONet *n, Error **errp)
n->primary_device_opts = qemu_opts_from_qdict(
qemu_find_opts("device"),
n->primary_device_dict, errp);
if (!n->primary_device_opts) {
error_setg(errp, "virtio_net: couldn't find primary device opts");
goto out;
}
}
if (n->primary_device_opts) {
if (n->primary_dev) {
n->primary_bus = n->primary_dev->parent_bus;
}
qdev_set_parent_bus(n->primary_dev, n->primary_bus);
n->primary_should_be_hidden = false;
qemu_opt_set_bool(n->primary_device_opts,
"partially_hotplugged", true, errp);
hotplug_ctrl = qdev_get_hotplug_handler(n->primary_dev);
if (hotplug_ctrl) {
hotplug_handler_pre_plug(hotplug_ctrl, n->primary_dev, errp);
hotplug_handler_plug(hotplug_ctrl, n->primary_dev, errp);
}
if (!n->primary_dev) {
if (!n->primary_dev) {
error_setg(errp, "virtio_net: couldn't find primary device");
}
goto out;
}
return *errp != NULL;
n->primary_bus = n->primary_dev->parent_bus;
if (!n->primary_bus) {
error_setg(errp, "virtio_net: couldn't find primary bus");
goto out;
}
qdev_set_parent_bus(n->primary_dev, n->primary_bus);
n->primary_should_be_hidden = false;
qemu_opt_set_bool(n->primary_device_opts,
"partially_hotplugged", true, errp);
hotplug_ctrl = qdev_get_hotplug_handler(n->primary_dev);
if (hotplug_ctrl) {
hotplug_handler_pre_plug(hotplug_ctrl, n->primary_dev, errp);
hotplug_handler_plug(hotplug_ctrl, n->primary_dev, errp);
}
out:
return *errp == NULL;
}
static void virtio_net_handle_migration_primary(VirtIONet *n,
@ -2852,7 +2860,7 @@ static void virtio_net_handle_migration_primary(VirtIONet *n,
warn_report("couldn't unplug primary device");
}
} else if (migration_has_failed(s)) {
/* We already unplugged the device let's plugged it back */
/* We already unplugged the device let's plug it back */
if (!failover_replug_primary(n, &err)) {
if (err) {
error_report_err(err);