On 8/12/19 2:31 AM, Jiri Pirko wrote:
> Mon, Aug 12, 2019 at 03:37:26AM CEST, dsah...@gmail.com wrote:
>> On 8/11/19 7:34 PM, David Ahern wrote:
>>> On 8/10/19 12:30 AM, Jiri Pirko wrote:
>>>> Could you please write me an example message of add/remove?
>>>
>>> altnames are for existing netdevs, yes? existing netdevs have an id and
>>> a name - 2 existing references for identifying the existing netdev for
>>> which an altname will be added. Even using the altname as the main
>>> 'handle' for a setlink change, I see no reason why the GETLINK api can
>>> not take an the IFLA_ALT_IFNAME and return the full details of the
>>> device if the altname is unique.
>>>
>>> So, what do the new RTM commands give you that you can not do with
>>> RTM_*LINK?
>>>
>>
>>
>> To put this another way, the ALT_NAME is an attribute of an object - a
>> LINK. It is *not* a separate object which requires its own set of
>> commands for manipulating.
> 
> Okay, again, could you provide example of a message to add/remove
> altname using existing setlink message? Thanks!
> 

Examples from your cover letter with updates

$ ip link set dummy0 altname someothername
$ ip link set dummy0 altname someotherveryveryveryverylongname

$ ip link set dummy0 del altname someothername
$ ip link set dummy0 del altname someotherveryveryveryverylongname

This syntactic sugar to what is really happening:

RTM_NEWLINK, dummy0, IFLA_ALT_IFNAME

if you are allowing many alt names, then yes, you need a flag to say
delete this specific one which is covered by Roopa's nested suggestion.

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