linux-kernel - Re: [PATCH v3 net-next 1/1] Allow user to set metric on default route learned via Router Advertisement.

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Date:   Sat, 23 Jan 2021 18:13:22 -0700
From:   David Ahern <dsahern@...il.com>
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     Maciej Żenczykowski <zenczykowski@...il.com>,
        Praveen Chaudhary <praveen5582@...il.com>,
        David Miller <davem@...emloft.net>, corbet@....net,
        Alexey Kuznetsov <kuznet@....inr.ac.ru>,
        Hideaki Yoshifuji <yoshfuji@...ux-ipv6.org>,
        Linux NetDev <netdev@...r.kernel.org>,
        linux-doc@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Zhenggen Xu <zxu@...kedin.com>
Subject: Re: [PATCH v3 net-next 1/1] Allow user to set metric on default route
 learned via Router Advertisement.

On 1/23/21 1:00 PM, Jakub Kicinski wrote:
> On Fri, 22 Jan 2021 22:16:41 -0700 David Ahern wrote:
>> On 1/22/21 9:02 PM, Maciej Żenczykowski wrote:
>>> Why can't we get rid of the special case for 0 and simply make 1024 the
>>> default value?  
>>
>> That would work too.
> 
> Should we drop it then? Easier to bring it back than to change the
> interpretation later. It doesn't seem to serve any clear purpose right
> now.
> 
> (Praveen if you post v4 please take a look at the checkpatch --strict
> warnings and address the ones which make sense, e.g. drop the brackets
> around comparisons, those are just noise, basic grasp of C operator
> precedence can be assumed in readers of kernel code).
> 

let's do a v4.

Praveen: set the initial value to IP6_RT_PRIO_USER, do not allow 0,
remove the checks on value and don't forget to update documentation.

Oh and cc me on the next otherwise the review depends on me finding time
to scan netdev.