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From: Jakub Kicinski <jakub.kicinski@netronome.com>
To: Krzesimir Nowak <krzesimir@kinvolk.io>
Cc: bpf@vger.kernel.org, iago@kinvolk.io, alban@kinvolk.io,
	Shuah Khan <shuah@kernel.org>,
	Alexei Starovoitov <ast@kernel.org>,
	Daniel Borkmann <daniel@iogearbox.net>,
	Martin KaFai Lau <kafai@fb.com>, Song Liu <songliubraving@fb.com>,
	Yonghong Song <yhs@fb.com>, Andrey Ignatov <rdna@fb.com>,
	linux-kselftest@vger.kernel.org, netdev@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH bpf v1 2/3] selftests/bpf: Print a message when tester could not run a program
Date: Wed, 15 May 2019 14:45:37 -0700	[thread overview]
Message-ID: <20190515144537.57f559e7@cakuba.netronome.com> (raw)
In-Reply-To: <20190515134731.12611-3-krzesimir@kinvolk.io>

On Wed, 15 May 2019 15:47:27 +0200, Krzesimir Nowak wrote:
> This prints a message when the error is about program type being not
> supported by the test runner or because of permissions problem. This
> is to see if the program we expected to run was actually executed.
> 
> The messages are open-coded because strerror(ENOTSUPP) returns
> "Unknown error 524".
> 
> Signed-off-by: Krzesimir Nowak <krzesimir@kinvolk.io>
> ---
>  tools/testing/selftests/bpf/test_verifier.c | 17 +++++++++++++----
>  1 file changed, 13 insertions(+), 4 deletions(-)
> 
> diff --git a/tools/testing/selftests/bpf/test_verifier.c b/tools/testing/selftests/bpf/test_verifier.c
> index ccd896b98cac..bf0da03f593b 100644
> --- a/tools/testing/selftests/bpf/test_verifier.c
> +++ b/tools/testing/selftests/bpf/test_verifier.c
> @@ -825,11 +825,20 @@ static int do_prog_test_run(int fd_prog, bool unpriv, uint32_t expected_val,
>  				tmp, &size_tmp, &retval, NULL);
>  	if (unpriv)
>  		set_admin(false);
> -	if (err && errno != 524/*ENOTSUPP*/ && errno != EPERM) {
> -		printf("Unexpected bpf_prog_test_run error ");
> -		return err;
> +	if (err) {
> +		switch (errno) {
> +		case 524/*ENOTSUPP*/:
> +			printf("Did not run the program (not supported) ");
> +			return 0;
> +		case EPERM:
> +			printf("Did not run the program (no permission) ");
> +			return 0;

Perhaps use strerror(errno)?

> +		default:
> +			printf("Unexpected bpf_prog_test_run error ");
> +			return err;
> +		}
>  	}
> -	if (!err && retval != expected_val &&
> +	if (retval != expected_val &&
>  	    expected_val != POINTER_VALUE) {
>  		printf("FAIL retval %d != %d ", retval, expected_val);
>  		return 1;


  reply	other threads:[~2019-05-15 21:46 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-15 13:47 [PATCH bpf v1 0/3] Test the 32bit narrow reads Krzesimir Nowak
2019-05-15 13:47 ` [PATCH bpf v1 1/3] selftests/bpf: Test correctness of narrow 32bit read on 64bit field Krzesimir Nowak
2019-05-23 16:02   ` Daniel Borkmann
2019-05-15 13:47 ` [PATCH bpf v1 2/3] selftests/bpf: Print a message when tester could not run a program Krzesimir Nowak
2019-05-15 21:45   ` Jakub Kicinski [this message]
2019-05-16  9:29     ` Krzesimir Nowak
2019-05-16 15:50       ` Jakub Kicinski
2019-05-16 16:21         ` Krzesimir Nowak
2019-05-16 16:54           ` Jakub Kicinski
2019-05-15 13:47 ` [PATCH bpf v1 3/3] selftests/bpf: Avoid a clobbering of errno Krzesimir Nowak
2019-05-15 21:50   ` Jakub Kicinski
2019-05-16  9:31     ` Krzesimir Nowak

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