netdev - Re: [PATCHv4 net] ipv6: no need to check rt->dst.error when get route info

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Message-ID: <CAJieiUhQfj-ZVNuQc6o_DZTrcZn++BJArhjZsG_m6J0otGPj6A@mail.gmail.com>
Date:   Thu, 27 Jul 2017 12:52:37 -0700
From:   Roopa Prabhu <roopa@...ulusnetworks.com>
To:     Hangbin Liu <liuhangbin@...il.com>
Cc:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Cong Wang <xiyou.wangcong@...il.com>,
        David Ahern <dsahern@...il.com>
Subject: Re: [PATCHv4 net] ipv6: no need to check rt->dst.error when get route info

On Thu, Jul 27, 2017 at 9:25 AM, Hangbin Liu <liuhangbin@...il.com> wrote:
> After commit 18c3a61c4264 ("net: ipv6: RTM_GETROUTE: return matched fib
> result when requested"). When we get a prohibit ertry, we will return
> -EACCES directly instead of dump route info.
>
> Fix it by remove the rt->dst.error check.
>
> Before fix:
> \# ip -6 route add prohibit 2003::/64 dev eth1
> \# ip -6 route get fibmatch 2003::1
> RTNETLINK answers: Permission denied
> \# ip -6 route add unreachable 2004::/64 dev eth1
> \# ip -6 route get fibmatch 2004::1
> RTNETLINK answers: No route to host
>
> After fix:
> \# ip -6 route add prohibit 2003::/64 dev eth1
> \# ip -6 route get fibmatch 2003::1
> prohibit 2003::/64 dev lo metric 1024 error -13 pref medium
> \# ip -6 route add unreachable 2004::/64 dev eth1
> \# ip -6 route get fibmatch 2004::1
> unreachable 2004::/64 dev lo metric 1024 error -113 pref medium
>
> Fixes: 18c3a61c4264 ("net: ipv6: RTM_GETROUTE: return matched fib...")
> Signed-off-by: Hangbin Liu <liuhangbin@...il.com>
> ---

Acked-by: Roopa Prabhu <roopa@...ulusnetworks.com>