netdev - Re: [PATCH bpf-next 1/2] selftests/xsk: Ensure traffic validation proceeds after ring size adjustment in xskxceiver

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Message-ID: <Znr8z7zbFb+KD1lq@boxer>
Date: Tue, 25 Jun 2024 19:22:23 +0200
From: Maciej Fijalkowski <maciej.fijalkowski@...el.com>
To: Tushar Vyavahare <tushar.vyavahare@...el.com>
CC: <bpf@...r.kernel.org>, <netdev@...r.kernel.org>, <bjorn@...nel.org>,
	<magnus.karlsson@...el.com>, <jonathan.lemon@...il.com>,
	<davem@...emloft.net>, <kuba@...nel.org>, <pabeni@...hat.com>,
	<ast@...nel.org>, <daniel@...earbox.net>, <tirthendu.sarkar@...el.com>
Subject: Re: [PATCH bpf-next 1/2] selftests/xsk: Ensure traffic validation
 proceeds after ring size adjustment in xskxceiver

On Wed, Jun 19, 2024 at 01:20:47PM +0000, Tushar Vyavahare wrote:
> Previously, HW_SW_MIN_RING_SIZE and HW_SW_MAX_RING_SIZE test cases were
> not validating Tx/Rx traffic at all due to early return after changing HW
> ring size in testapp_validate_traffic().
> 
> Fix the flow by checking return value of set_ring_size() and act upon it
> rather than terminating the test case there.
> 
> Signed-off-by: Tushar Vyavahare <tushar.vyavahare@...el.com>

Reviewed-by: Maciej Fijalkowski <maciej.fijalkowski@...el.com>

> ---
>  tools/testing/selftests/bpf/xskxceiver.c | 14 +++++++++-----
>  1 file changed, 9 insertions(+), 5 deletions(-)
> 
> diff --git a/tools/testing/selftests/bpf/xskxceiver.c b/tools/testing/selftests/bpf/xskxceiver.c
> index 2eac0895b0a1..088df53869e8 100644
> --- a/tools/testing/selftests/bpf/xskxceiver.c
> +++ b/tools/testing/selftests/bpf/xskxceiver.c
> @@ -1899,11 +1899,15 @@ static int testapp_validate_traffic(struct test_spec *test)
>  	}
>  
>  	if (test->set_ring) {
> -		if (ifobj_tx->hw_ring_size_supp)
> -			return set_ring_size(ifobj_tx);
> -
> -	ksft_test_result_skip("Changing HW ring size not supported.\n");
> -	return TEST_SKIP;
> +		if (ifobj_tx->hw_ring_size_supp) {
> +			if (set_ring_size(ifobj_tx)) {
> +				ksft_test_result_skip("Failed to change HW ring size.\n");
> +				return TEST_FAILURE;
> +			}
> +		} else {
> +			ksft_test_result_skip("Changing HW ring size not supported.\n");
> +			return TEST_SKIP;
> +		}
>  	}
>  
>  	xsk_attach_xdp_progs(test, ifobj_rx, ifobj_tx);
> -- 
> 2.34.1
>