netdev - Re: [PATCHv2] selftests/net: skip psock_tpacket test if KALLSYMS was not enabled

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Date:   Tue, 2 Jul 2019 13:09:32 -0600
From:   shuah <shuah@...nel.org>
To:     Po-Hsu Lin <po-hsu.lin@...onical.com>, davem@...emloft.net,
        linux-kselftest@...r.kernel.org
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        shuah <shuah@...nel.org>
Subject: Re: [PATCHv2] selftests/net: skip psock_tpacket test if KALLSYMS was
 not enabled

On 6/30/19 10:40 PM, Po-Hsu Lin wrote:
> The psock_tpacket test will need to access /proc/kallsyms, this would
> require the kernel config CONFIG_KALLSYMS to be enabled first.
> 
> Apart from adding CONFIG_KALLSYMS to the net/config file here, check the
> file existence to determine if we can run this test will be helpful to
> avoid a false-positive test result when testing it directly with the
> following commad against a kernel that have CONFIG_KALLSYMS disabled:
>      make -C tools/testing/selftests TARGETS=net run_tests
> 
> Signed-off-by: Po-Hsu Lin <po-hsu.lin@...onical.com>
> ---
>   tools/testing/selftests/net/config            |  1 +
>   tools/testing/selftests/net/run_afpackettests | 14 +++++++++-----
>   2 files changed, 10 insertions(+), 5 deletions(-)
> 
> diff --git a/tools/testing/selftests/net/config b/tools/testing/selftests/net/config
> index 4740404..3dea2cb 100644
> --- a/tools/testing/selftests/net/config
> +++ b/tools/testing/selftests/net/config
> @@ -25,3 +25,4 @@ CONFIG_NF_TABLES_IPV6=y
>   CONFIG_NF_TABLES_IPV4=y
>   CONFIG_NFT_CHAIN_NAT_IPV6=m
>   CONFIG_NFT_CHAIN_NAT_IPV4=m
> +CONFIG_KALLSYMS=y
> diff --git a/tools/testing/selftests/net/run_afpackettests b/tools/testing/selftests/net/run_afpackettests
> index ea5938e..8b42e8b 100755
> --- a/tools/testing/selftests/net/run_afpackettests
> +++ b/tools/testing/selftests/net/run_afpackettests
> @@ -21,12 +21,16 @@ fi
>   echo "--------------------"
>   echo "running psock_tpacket test"
>   echo "--------------------"
> -./in_netns.sh ./psock_tpacket
> -if [ $? -ne 0 ]; then
> -	echo "[FAIL]"
> -	ret=1
> +if [ -f /proc/kallsyms ]; then
> +	./in_netns.sh ./psock_tpacket
> +	if [ $? -ne 0 ]; then
> +		echo "[FAIL]"
> +		ret=1
> +	else
> +		echo "[PASS]"
> +	fi
>   else
> -	echo "[PASS]"
> +	echo "[SKIP] CONFIG_KALLSYMS not enabled"
>   fi
>   
>   echo "--------------------"
> 

Looks good to me. Thanks for the patch.

Acked-by: Shuah Khan <skhan@...uxfoundation.org>

thanks,
-- Shuah