[dpdk-dev] [dpdk-dev v2 1/2] ethdev: add new tunnel type for ecpri

[Ferruh Yigit]

On 1/8/2021 10:23 AM, Thomas Monjalon wrote:
> 08/01/2021 10:22, Ferruh Yigit:
>> On 1/7/2021 1:33 PM, Thomas Monjalon wrote:
>>> 07/01/2021 13:47, Zhang, Qi Z:
>>>> From: Thomas Monjalon <thomas at monjalon.net>
>>>>> 07/01/2021 10:32, Guo, Jia:
>>>>>> From: Thomas Monjalon <thomas at monjalon.net>
>>>>>>> Sorry, it is a nack.
>>>>>>> BTW, it is probably breaking the ABI because of RTE_TUNNEL_TYPE_MAX.
>>>>
>>>> Yes that may break the ABI but fortunately the checking-abi-compatibility tool shows negative :) , thanks Ferruh' s guide.
>>>> https://github.com/ferruhy/dpdk/actions/runs/468859673
>>>
>>> That's very strange. An enum value is changed.
>>> Why it is not flagged by libabigail?
>>
>> As long as the enum values not sent to the application and kept within the
>> library, changing their values shouldn't be problem.
> 
> But RTE_TUNNEL_TYPE_MAX is part of lib/librte_ethdev/rte_ethdev.h
> so it is exposed to the application.
> I think it is a case of ABI breakage.
> 

Yes it is exposed to the application. But in runtime does it exchanged between 
library and application is the issue I think.
For this case it seems it is not, so not an ABI break.