linux-kernel - Re: [PATCH] net: ipv6: Truncate single route when it doesn't fit into dump buffer.

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Message-ID: <3828cf04-1bf8-92d2-dfc4-184bd615fe10@gmail.com>
Date:   Fri, 12 May 2017 10:26:08 -0700
From:   David Ahern <dsahern@...il.com>
To:     David Miller <davem@...emloft.net>, mq@....cz
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        dsa@...ulusnetworks.com, kuznet@....inr.ac.ru, jmorris@...ei.org,
        yoshfuji@...ux-ipv6.org, kaber@...sh.net
Subject: Re: [PATCH] net: ipv6: Truncate single route when it doesn't fit into
 dump buffer.

On 5/12/17 8:24 AM, David Miller wrote:
> From: Jan Moskyto Matejka <mq@....cz>
> Date: Fri, 12 May 2017 13:15:10 +0200
> 
>> -int rt6_dump_route(struct rt6_info *rt, void *p_arg);
>> +int rt6_dump_route(struct rt6_info *rt, void *p_arg, int truncate);
> 
> Please use "bool" and "true"/"false" for boolean values.
> 
> What does ipv4 do in this situation?
> 
> I'm hesitant to be OK with adding a new nlmsg flag just for this case
> if we solve this problem differently and using existing mechanisms
> elsewhere.
> 

I'll take a look at this later today or this weekend; we can't just
truncate the route returned to userspace.