linux-kernel - Re: [net] selftests: srv6: make srv6_end_dt46_l3vpn

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Message-ID: <46a3adcb-856c-9f62-b31e-053ff92f9673@kernel.org>
Date:   Thu, 27 Apr 2023 15:54:19 -0600
From:   David Ahern <dsahern@...nel.org>
To:     Andrea Mayer <andrea.mayer@...roma2.it>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, Shuah Khan <shuah@...nel.org>,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        linux-kselftest@...r.kernel.org
Cc:     Stefano Salsano <stefano.salsano@...roma2.it>,
        Paolo Lungaroni <paolo.lungaroni@...roma2.it>,
        Ahmed Abdelsalam <ahabdels.dev@...il.com>,
        Hangbin Liu <liuhangbin@...il.com>
Subject: Re: [net] selftests: srv6: make srv6_end_dt46_l3vpn_test more robust

On 4/27/23 3:49 AM, Andrea Mayer wrote:
> On some distributions, the rp_filter is automatically set (=1) by
> default on a netdev basis (also on VRFs).
> In an SRv6 End.DT46 behavior, decapsulated IPv4 packets are routed using
> the table associated with the VRF bound to that tunnel. During lookup
> operations, the rp_filter can lead to packet loss when activated on the
> VRF.
> Therefore, we chose to make this selftest more robust by explicitly
> disabling the rp_filter during tests (as it is automatically set by some
> Linux distributions).
> 
> Fixes: 03a0b567a03d ("selftests: seg6: add selftest for SRv6 End.DT46 Behavior")
> Reported-by: Hangbin Liu <liuhangbin@...il.com>
> Signed-off-by: Andrea Mayer <andrea.mayer@...roma2.it>
> Tested-by: Hangbin Liu <liuhangbin@...il.com>
> ---
>  .../testing/selftests/net/srv6_end_dt46_l3vpn_test.sh  | 10 +++++-----
>  1 file changed, 5 insertions(+), 5 deletions(-)
> 

Reviewed-by: David Ahern <dsahern@...nel.org>