netdev - Re: [PATCH net] net/route: remove ip route rtm_src_len, rtm_dst

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Message-ID: <49a723db-1698-761d-7c20-49797ed87cd1@gmail.com>
Date:   Fri, 10 Jan 2020 14:48:03 -0700
From:   David Ahern <dsahern@...il.com>
To:     Hangbin Liu <liuhangbin@...il.com>, netdev@...r.kernel.org
Cc:     Jakub Kicinski <jakub.kicinski@...ronome.com>,
        "David S . Miller" <davem@...emloft.net>
Subject: Re: [PATCH net] net/route: remove ip route rtm_src_len, rtm_dst_len
 valid check

On 1/10/20 1:24 AM, Hangbin Liu wrote:
> In patch set e266afa9c7af ("Merge branch
> 'net-use-strict-checks-in-doit-handlers'") we added a check for
> rtm_src_len, rtm_dst_len, which will cause cmds like
> "ip route get 192.0.2.0/24" failed.

kernel does not handle route gets for a range. Any output is specific to
the prefix (192.0.2.0 in your example) so it seems to me the /24 request
should fail.