netdev - Re: [PATCH net-next v2] net: Add table id from route lookup to route response

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Date:	Wed, 2 Sep 2015 22:23:14 +0200
From:	Thomas Graf <tgraf@...g.ch>
To:	David Ahern <dsa@...ulusnetworks.com>
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH net-next v2] net: Add table id from route lookup to route
 response

On 09/02/15 at 01:16pm, David Ahern wrote:
> IPv4 ABI has the table hardcoded as RT_TABLE_MAIN regardless of the table
> hit for the route lookup. Add the table using a new attribute,
> RTA_TABLE_LOOKUP, to maintain the ABI yet return the right table id.
> 
> Signed-off-by: David Ahern <dsa@...ulusnetworks.com>
> ---
> 
> Thomas: Something like this?
> 
> The current ABI is returning wrong data in some cases; that seems worse
> to me than breaking the ABI.

Another option is to introduce a new flag bundled with RTM_GETROUTE
which fixes RTM_GETROUTE altogether and makes it return the actual
route instead of a simulated cache entry.
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