Serhey Popovych wrote:
> David Ahern wrote:
>> On 2/26/18 11:20 AM, Serhey Popovych wrote:
>>> Stephen Hemminger wrote:
>>>> On Thu, 22 Feb 2018 15:02:06 +0200
>>>> Serhey Popovych <serhe.popov...@gmail.com> wrote:
>>>>
>>>>> +struct iplink_parse_args {
>>>>> + const char *dev;
>>>>> + const char *name;
>>>>> + const char *type;
>>>>> +
>>>>> + /* This definitely must be the last one and initialized
>>>>> + * by the caller of iplink_parse() that will initialize rest.
>>>>> + */
>>>>> + struct iplink_req *req;
>>>>> +};
>>>>> +
>>>>
>>>> No control block please.
>>> Accepted.
>>>
>>>> If you have too many arguments, then that means you need to do
>>>> some refactoring.
>>>
>>> So using structure as single argument to a function isn't an option?
>>>
>>>>
>>>
>>>
>>
>> As I mentioned before, iplink_parse should not be used by vxcan or veth
>> as they only want a subset of the parsing. Once you take those users
>> out, iplink_parse becomes local to iplink.c with a single user. In which
>> case I suspect the compiler will always inline the function so no
>> refactoring on the number of arguments is needed.
>>
> I will implement cut down function to parse vxcan and veth peer device
> parameters and reuse it in iplink_parse() to avoid code duplications.
>
> But my final goal not to refactor on number of arguments to parse,
> that's side product of this series, I want to take @name, @dev and
> other parameters for later use. In ->parse_opt() modules @name, @dev
> and others are not available easily. It seems only way to get them is
> to parse supplied netlink buffer.
>
>
While looking on how to make iplink_parse_light() that will be used with
vxcan and veth I found following problems:
1) need to copy nearly all parameters parsing code (except vf, alias,
carrier, master, protodown, link-netnsid, addrgenmode). this will
be mitigated by re using iplink_parse_light() in iplink_parse()
2) how to add attributes like IFLA_GROUP? in caller? this will give
even more code duplications.
3) there is high risk of adding regression either via conflicting
matches() parameter in userspace or missing kernel attribute
previously supported.
Sorry, I do not like this approach. I do not want to broke anything,
I just want @name and @dev parameters in ->parse_opt().
2)
>
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