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Subject: Re: [PATCH] selftests: fib_nexthop_multiprefix: fix cleanup() netns
 deletion
To:     Paolo Pisati <paolo.pisati@canonical.com>,
        "David S . Miller" <davem@davemloft.net>,
        Jakub Kicinski <kuba@kernel.org>, Shuah Khan <shuah@kernel.org>
Cc:     netdev@vger.kernel.org, linux-kselftest@vger.kernel.org,
        linux-kernel@vger.kernel.org
References: <20200714154055.68167-1-paolo.pisati@canonical.com>
From:   David Ahern <dsahern@gmail.com>
Message-ID: <4437df59-b9e3-e52d-8e43-e4dd3eab3c21@gmail.com>
Date:   Tue, 14 Jul 2020 11:58:28 -0600
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On 7/14/20 9:40 AM, Paolo Pisati wrote:
> During setup():
> ...
>         for ns in h0 r1 h1 h2 h3
>         do
>                 create_ns ${ns}
>         done
> ...
> 
> while in cleanup():
> ...
>         for n in h1 r1 h2 h3 h4
>         do
>                 ip netns del ${n} 2>/dev/null
>         done
> ...
> 
> and after removing the stderr redirection in cleanup():
> 
> $ sudo ./fib_nexthop_multiprefix.sh
> ...
> TEST: IPv4: host 0 to host 3, mtu 1400                              [ OK ]
> TEST: IPv6: host 0 to host 3, mtu 1400                              [ OK ]
> Cannot remove namespace file "/run/netns/h4": No such file or directory
> $ echo $?
> 1
> 
> and a non-zero return code, make kselftests fail (even if the test
> itself is fine):
> 
> ...
> not ok 34 selftests: net: fib_nexthop_multiprefix.sh # exit=1
> ...
> 
> Signed-off-by: Paolo Pisati <paolo.pisati@canonical.com>
> ---
>  tools/testing/selftests/net/fib_nexthop_multiprefix.sh | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/tools/testing/selftests/net/fib_nexthop_multiprefix.sh b/tools/testing/selftests/net/fib_nexthop_multiprefix.sh
> index 9dc35a16e415..51df5e305855 100755
> --- a/tools/testing/selftests/net/fib_nexthop_multiprefix.sh
> +++ b/tools/testing/selftests/net/fib_nexthop_multiprefix.sh
> @@ -144,7 +144,7 @@ setup()
>  
>  cleanup()
>  {
> -	for n in h1 r1 h2 h3 h4
> +	for n in h0 r1 h1 h2 h3
>  	do
>  		ip netns del ${n} 2>/dev/null
>  	done
> 

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