netdev - Re: [PATCH iproute2 v2] ip route: Make name of protocol 0 consistent

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Date:   Sat, 18 Feb 2017 16:09:04 -0800
From:   Stephen Hemminger <stephen@...workplumber.org>
To:     David Ahern <dsa@...ulusnetworks.com>
Cc:     netdev@...r.kernel.org
Subject: Re: [PATCH iproute2 v2] ip route: Make name of protocol 0
 consistent

On Mon, 13 Feb 2017 12:21:53 -0800
David Ahern <dsa@...ulusnetworks.com> wrote:

> iproute2 can inconsistently show the name of protocol 0 if a route with
> a custom protocol is added. For example:
>   dsa@...tman:~$ ip -6 ro ls table all | egrep 'proto none|proto unspec'
>   local ::1 dev lo  table local  proto none  metric 0  pref medium
>   local fe80::225:90ff:fecb:1c18 dev lo  table local  proto none  metric 0  pref medium
>   local fe80::92e2:baff:fe5c:da5d dev lo  table local  proto none  metric 0  pref medium
> 
> protocol 0 is pretty printed as "none". Add a route with a custom protocol:
>   dsa@...tman:~$ sudo ip -6 ro add  2001:db8:200::1/128 dev eth0 proto 123
> 
> And now display has switched from "none" to "unspec":
>   dsa@...tman:~$ ip -6 ro ls table all | egrep 'proto none|proto unspec'
>   local ::1 dev lo  table local  proto unspec  metric 0  pref medium
>   local fe80::225:90ff:fecb:1c18 dev lo  table local  proto unspec  metric 0  pref medium
>   local fe80::92e2:baff:fe5c:da5d dev lo  table local  proto unspec  metric 0  pref medium
> 
> The rt_protos file has the id to name mapping as "unspec" while
> rtnl_rtprot_tab[0] has "none". The presence of a custom protocol id
> triggers reading the rt_protos file and overwriting the string in
> rtnl_rtprot_tab. All of this is logic from 2004 and earlier.
> 
> Update rtnl_rtprot_tab to "unspec" to match the enum value.
> 
> Signed-off-by: David Ahern <dsa@...ulusnetworks.com>

Applied, thanks.