netdev - Re: iproute2: make ip route list to search by metric too

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Message-ID: <CABXn0zeE=NDTfBxG+tjrQ2o2Wt=Ji9wHuVG0dFTDW=3D551X=g@mail.gmail.com>
Date:   Sat, 18 Nov 2017 11:11:19 +0100
From:   Alexander Zubkov <zubkov318@...il.com>
To:     netdev@...r.kernel.org
Subject: Re: iproute2: make ip route list to search by metric too

I think this version will be better. It uses metric mask (like for
some other options) instead of simple yes/no flag.

On Sat, Nov 18, 2017 at 2:44 AM, Alexander Zubkov <zubkov318@...il.com> wrote:
> Hello again,
>
> Things turned out to be not so hard. Please take a look at the attached patch.
> I'm only not sure if RTA_PRIORITY is enough. Because the print_route
> function prints "metric" also for some situations with RTA_METRICS,
> which I haven't managed to understand.
>
> On Fri, Nov 17, 2017 at 1:40 AM, Alexander Zubkov <zubkov318@...il.com> wrote:
>> Hello all,
>>
>> Currently routes in the Linux routing table have these "key" fields:
>> prefix, tos, table, metric (as I know). I.e. we cannot have two
>> different routes with the same set of this fields. And "ip route list"
>> command can be provided with all but one of those fields. We cannot
>> pass metric to it and this is inconvenient. I ask if this behaviour
>> can be changed by someone. We can even use "secondary" fields, for
>> example type, dev or via, but not metric unfortunately.
>> Sorry, I can not provide patches. I have written code long time ago. I
>> tried to trace it, but as I see it parses arguments and fills some
>> structures. And then my tries to understand failed.
>> I opened the bug: https://bugzilla.kernel.org/show_bug.cgi?id=197897,
>> but I was pointed out that this mailing list is a better place for
>> this question.
>>
>> --
>> Alexander Zubkov

Download attachment "list-metric.patch.2" of type "application/octet-stream" (1266 bytes)