On 2015/05/28 10:25, Tetsuya Mukawa wrote:
> On 2015/05/26 21:52, Eric Blake wrote:
>> On 05/25/2015 10:29 PM, Tetsuya Mukawa wrote:
>>
>>>>>> { 'struct': 'NetdevTapOptions',
>>>>>> @@ -2259,7 +2261,8 @@
>>>>>> '*vhostfd': 'str',
>>>>>> '*vhostfds': 'str',
>>>>>> '*vhostforce': 'bool',
>>>>>> - '*queues': 'uint32'} }
>>>>>> + '*queues': 'uint32',
>>>>>> + '*backend_features':'uint64'} }
>>>>> Ewww. Making users figure out what integers to pass is NOT user
>>>>> friendly. Better would be an enum type, and make the parameter an
>>>>> optional array of enum values.
>>>> Thanks for your comments.
>>>> I guess below may be good example. Is this same as your suggestion?
>>>>
>>>>
>>>> virtio-net-pci,netdev=hostnet3,id=net3,gso=off,guest_tso4=off,guest_tso6=off
>>>>
>>>> So I will improve 'backend-features' like below.
>>>>
>>>> backend-features=gso=off,guest_tso4=off,guest_tso6=off
>>>>
>>>> Also I will fix 'qapi-schema.json' to work like above.
>>> I seems it's impossible to implement like above.
>>> I may need to implement like below.
>>>
>>> virtio-net-pci,netdev=hostnet3,id=net3,backend_gso=on,backend_guest_tso4=on,backend_guest_tso6=on
>> Or even:
>>
>> virtio-net-pci,netdev=hostnet3,id=net3,backend.gso=on,backend.guest_tso4=on,backend.guest_tso6=on
>>
>> Look at -device for how to set up nested structs using '.' for a nice
>> hierarchy of options all belonging to a common substruct.
>>
> I appreciate for your suggestion.
> I will check '-device' option, and implement like above in v2 patch.
I've checked '-device' option and DeviceClass, and found I may not be
able to use above nice hierarchy with '-net' option.
Probably it is because '-net' option isn't for describing device itself,
so there is no DeviceClass.
And without DeviceClass I guess I cannot use '.' infrastructure.
I may be able to describe vhost-user backend features in '-device
virtio-net-pci,.....', but I guess it's not good.
Probably describing in '-net vhost-user,....' will be good.
As described above, I implemented like below in next patch.
-chardev socket,id=chr0,path=/tmp/sock,reconnect=3 \
-device virtio-net-pci,netdev=net0 \
-netdev
vhost-user,id=net0,chardev=chr0,vhostforce,backend_gso=on,backend_guest_ecn=on
BTW, '-device' option has already had options like below.
- guest_csum
- guest_tso4
.....
So I used '_' like below
- backend_guest_csum
- backend_guest_tso4
......
Regards,
Tetsuya
