[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Qemu-stable] [Qemu-devel] [PATCH] vhost_net: cleanup recovery
From: |
Andrey Korolyov |
Subject: |
Re: [Qemu-stable] [Qemu-devel] [PATCH] vhost_net: cleanup recovery |
Date: |
Wed, 3 Sep 2014 13:37:33 +0400 |
On Wed, Sep 3, 2014 at 1:20 PM, Jason Wang <address@hidden> wrote:
> On 09/03/2014 05:10 PM, Michael S. Tsirkin wrote:
>> commit aad4dce934649b3a398396fc2a76f215bb194ea4
>> vhost_net: start/stop guest notifiers properly
>>
>> changed the order of calls for guest notifiers,
>> but did not recover in the correct (reverse) order.
>> Fix it up.
>>
>> Cc: address@hidden
>> Cc: Andrey Korolyov <address@hidden>
>> Cc: Jason Wang <address@hidden>
>> Signed-off-by: Michael S. Tsirkin <address@hidden>
>> ---
>> hw/net/vhost_net.c | 12 +++++++++---
>> 1 file changed, 9 insertions(+), 3 deletions(-)
>>
>> diff --git a/hw/net/vhost_net.c b/hw/net/vhost_net.c
>> index ba5d544..1fe18c7 100644
>> --- a/hw/net/vhost_net.c
>> +++ b/hw/net/vhost_net.c
>> @@ -289,7 +289,7 @@ int vhost_net_start(VirtIODevice *dev, NetClientState
>> *ncs,
>> BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(dev)));
>> VirtioBusState *vbus = VIRTIO_BUS(qbus);
>> VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(vbus);
>> - int r, i = 0;
>> + int r, i;
>>
>> if (!vhost_net_device_endian_ok(dev)) {
>> error_report("vhost-net does not support cross-endian");
>> @@ -317,16 +317,22 @@ int vhost_net_start(VirtIODevice *dev, NetClientState
>> *ncs,
>> r = vhost_net_start_one(get_vhost_net(ncs[i].peer), dev);
>>
>> if (r < 0) {
>> - goto err;
>> + goto err_start;
>> }
>> }
>>
>> return 0;
>>
>> -err:
>> +err_start:
>> while (--i >= 0) {
>> vhost_net_stop_one(get_vhost_net(ncs[i].peer), dev);
>> }
>> +err:
>> + r = k->set_guest_notifiers(qbus->parent, total_queues * 2, false);
>> + if (r < 0) {
>> + fprintf(stderr, "vhost guest notifier cleanup failed: %d\n", r);
>> + fflush(stderr);
>> + }
>
> We probably need a new label, since we only want to do this when guest
> notifiers has been set.
>> return r;
>> }
>>
>
Erm, no improvements for me from V1 - brand-new assert at reset and
lack of connectivity.