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

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Date:   Sat, 18 Nov 2017 02:44:02 +0100
From:   Alexander Zubkov <zubkov318@...il.com>
To:     netdev@...r.kernel.org
Subject: Re: iproute2: make ip route list to search by metric too

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

View attachment "list-metric.patch" of type "text/x-patch" (1253 bytes)