netdev - Re: [PATCH net-next v10 1/4] net netlink: Add new type NLA_FLAG

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Date:   Sun, 11 Jun 2017 14:37:25 -0400
From:   Jamal Hadi Salim <jhs@...atatu.com>
To:     Jiri Pirko <jiri@...nulli.us>
Cc:     davem@...emloft.net, netdev@...r.kernel.org,
        xiyou.wangcong@...il.com, eric.dumazet@...il.com,
        simon.horman@...ronome.com, mrv@...atatu.com
Subject: Re: [PATCH net-next v10 1/4] net netlink: Add new type NLA_FLAG_BITS

On 17-06-11 01:38 PM, Jamal Hadi Salim wrote:
> On 17-06-11 09:49 AM, Jiri Pirko wrote:
>> Sun, Jun 11, 2017 at 01:53:43PM CEST, jhs@...atatu.com wrote:
>>> From: Jamal Hadi Salim <jhs@...atatu.com>
> 
> 
>>> This patch also provides an extra feature: a validation callback
>>> that could be speaciliazed for other types.
>>
>> s/speaciliazed/speciliazed/
>>
> 
> Will fix.
> 
> 
>>>
>>> [ATTR_GOO] = { .type = MYTYPE,
>>>            .validation_data = &myvalidation_data,
>>>                .validate_content = mycontent_validator },
>>
>> Indent is wrong. (Does not matter really in desc, but anyway)
>>
> 
> I cant find out how it got indented that way; my source
> or email dont show it as such (but really doesnt matter).
> 
> 
>> Suggested-by: Jiri Pirko <jiri@...lanox.com>
>>
> 
> Will add.
> 
>>
>>> ---
>>> include/net/netlink.h          | 11 +++++++++++
>>> include/uapi/linux/rtnetlink.h | 17 +++++++++++++++++
>>> lib/nlattr.c                   | 25 +++++++++++++++++++++++++
>>> 3 files changed, 53 insertions(+)
>>>
>>> diff --git a/include/net/netlink.h b/include/net/netlink.h
>>> index 0170917..8ab9784 100644
>>> --- a/include/net/netlink.h
>>> +++ b/include/net/netlink.h
>>> @@ -6,6 +6,11 @@
>>> #include <linux/jiffies.h>
>>> #include <linux/in6.h>
>>>
>>> +struct nla_bit_flags {
>>> +    u32 nla_flag_values;
>>> +    u32 nla_flag_selector;
>>> +};
>>
>> I don't understand why you redefine the struct here. You already have it
>> defined in the uapi: struct __nla_bit_flags
>>
>> Just move this (struct nla_bit_flags) to the uapi and remove
>> __nla_bit_flags ?
>>
> 
> I am not sure that will compile since the type is defined in netlink.h
> Also, note: uapi uses _u32 and kernel uses u32 as types i.e it is pretty
> common approach; i will try to move it to uapi and keep that uapi
> format. If it doesnt compile without acrobatics I will keep it as is.
>

It doesnt compile - I could move it to linux/netlink.h but it seems
so out of place.
so i will keep things as is for now unless you can think of something
else.

cheers,
jamal