Re: [Qemu-devel] [PATCH v2 13/15] net: Remove obsolete vlan info

[Jan Kiszka]

On 2012-05-24 09:34, Zhi Yong Wu wrote:
> On Thu, May 24, 2012 at 8:09 PM, Jan Kiszka <address@hidden> wrote:
>> On 2012-05-23 23:42, Zhi Yong Wu wrote:
>>> On Wed, May 23, 2012 at 11:41 PM, Jan Kiszka <address@hidden> wrote:
>>>> On 2012-05-23 12:14, address@hidden wrote:
>>>>> From: Zhi Yong Wu <address@hidden>
>>>>>
>>>>> Signed-off-by: Zhi Yong Wu <address@hidden>
>>>>> ---
>>>>>  net.c |    1 -
>>>>>  1 files changed, 0 insertions(+), 1 deletions(-)
>>>>>
>>>>> diff --git a/net.c b/net.c
>>>>> index 61dc28d..8c8e703 100644
>>>>> --- a/net.c
>>>>> +++ b/net.c
>>>>> @@ -1079,7 +1079,6 @@ void do_info_network(Monitor *mon)
>>>>>      NetClientState *nc, *peer;
>>>>>      net_client_type type;
>>>>>
>>>>> -    monitor_printf(mon, "Devices not on any VLAN:\n");
>>>>>      QTAILQ_FOREACH(nc, &net_clients, next) {
>>>>>          peer = nc->peer;
>>>>>          type = nc->info->type;
>>>>
>>>> This looks suspicious - or the patch description is improvable. This is
>>>> really just about removing that headline? And what about the indention
>>>> of the lines printed afterward?
>>> As you have known, vlan concept is replaced with hub. So i think that
>>> it is more reasonable to remove this in monitor.
>>
>> That is true. But the output formatting is still improvable.
>>
>>>>
>>>> It also leads me to the question how hub-based networks will be
>>>> visualized on "info network", specifically when there are multiple hubs.
>>>> Can you provide some more complex example of an info network output?
>>>
>>> (qemu) info network
>>>   virtio-net-pci.0: type=nic,model=virtio-net-pci,macaddr=52:54:00:12:34:56
>>>    \ hub0port0: type=(null),
>>>   virtio-net-pci.1: type=nic,model=virtio-net-pci,macaddr=52:54:00:12:34:57
>>>    \ hub1port0: type=(null),
>>> hub 1
>>>     port 1 peer user.1
>>>     port 0 peer virtio-net-pci.1
>>> hub 0
>>>     port 1 peer user.0
>>>     port 0 peer virtio-net-pci.0
>>
>> What about a layout like this:
>>
>> hub.0
>>  \ virtio-net-pci.0: ...
>>  \ virtio-net-pci.1: ...
>>  \ user.0: ...
>> hub.1
>>  \ e1000.0: ...
>> e1000.1: ...
>>  \ user.1: ...
> For this output, we can't find which port peers with which emulated
> NIC or network backend.

Why? This information should be available at least in the hubs. The info
network routine could call into a dumping helper of the hub to make it
available for visualization. It is surely not impossible, just not as
straightforward as it was so far.

Jan

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