netdev - Re: [RFC PATCH net 2/2] selftests: fib_nexthops: Test blackhole nexthops when loopback goes down

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Date:   Sun, 28 Feb 2021 16:41:09 -0700
From:   David Ahern <dsahern@...il.com>
To:     Ido Schimmel <idosch@...sch.org>, netdev@...r.kernel.org
Cc:     davem@...emloft.net, kuba@...nel.org, roopa@...dia.com,
        sharpd@...dia.com, mlxsw@...dia.com,
        Ido Schimmel <idosch@...dia.com>
Subject: Re: [RFC PATCH net 2/2] selftests: fib_nexthops: Test blackhole
 nexthops when loopback goes down

On 2/28/21 7:26 AM, Ido Schimmel wrote:
> From: Ido Schimmel <idosch@...dia.com>
> 
> Test that blackhole nexthops are not flushed when the loopback device
> goes down.
> 


> 
> Signed-off-by: Ido Schimmel <idosch@...dia.com>
> ---
>  tools/testing/selftests/net/fib_nexthops.sh | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/tools/testing/selftests/net/fib_nexthops.sh b/tools/testing/selftests/net/fib_nexthops.sh
> index 4c7d33618437..d98fb85e201c 100755
> --- a/tools/testing/selftests/net/fib_nexthops.sh
> +++ b/tools/testing/selftests/net/fib_nexthops.sh
> @@ -1524,6 +1524,14 @@ basic()
>  	run_cmd "$IP nexthop replace id 2 blackhole dev veth1"
>  	log_test $? 2 "Blackhole nexthop with other attributes"
>  
> +	# blackhole nexthop should not be affected by the state of the loopback
> +	# device
> +	run_cmd "$IP link set dev lo down"
> +	check_nexthop "id 2" "id 2 blackhole"
> +	log_test $? 0 "Blackhole nexthop with loopback device down"
> +
> +	run_cmd "$IP link set dev lo up"
> +
>  	#
>  	# groups
>  	#
> 

Thanks for adding a test.

Reviewed-by: David Ahern <dsahern@...il.com>