From mboxrd@z Thu Jan  1 00:00:00 1970
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References: <20190306214226.14598-1-tobin@kernel.org> <20190306214226.14598-4-tobin@kernel.org>
In-Reply-To: <20190306214226.14598-4-tobin@kernel.org>
From: Kees Cook <keescook@chromium.org>
Date: Tue, 2 Apr 2019 14:29:31 -0700
Message-ID: <CAGXu5j+OPGL3N95cxRWDm5zi=ZpyEH5qA4==UdedYqWr_yi6GQ@mail.gmail.com>
Subject: Re: [PATCH v3 3/7] kselftest/lib: Use new shell runner to define tests
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To: "Tobin C. Harding" <tobin@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>, Jann Horn <jannh@google.com>, Andy Shevchenko <andriy.shevchenko@linux.intel.com>, Randy Dunlap <rdunlap@infradead.org>, Rasmus Villemoes <linux@rasmusvillemoes.dk>, Stephen Rothwell <sfr@canb.auug.org.au>, Andy Lutomirski <luto@amacapital.net>, Daniel Micay <danielmicay@gmail.com>, Arnd Bergmann <arnd@arndb.de>, Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>, "Gustavo A. R. Silva" <gustavo@embeddedor.com>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Alexander Shishkin <alexander.shishkin@linux.intel.com>, Kernel Hardening <kernel-hardening@lists.openwall.com>, "open list:KERNEL SELFTEST FRAMEWORK" <linux-kselftest@vger.kernel.org>, LKML <linux-kernel@vger.kernel.org>
List-ID: <kernel-hardening.lists.openwall.com>

On Wed, Mar 6, 2019 at 1:43 PM Tobin C. Harding <tobin@kernel.org> wrote:
>
> We just added a new script kselftest_module.sh that can be used to
> define kselftest tests that run tests within a kernel module.  We can
> use it to reduce code duplication in all of the test runner scripts in
> tools/testing/selftests/lib/.
>
> Use new shell runner tools/testing/selftests/kselftest_module.sh to
> define test runner scripts.
>
> Signed-off-by: Tobin C. Harding <tobin@kernel.org>
> ---
>  tools/testing/selftests/lib/bitmap.sh        | 25 ++++++++++----------
>  tools/testing/selftests/lib/prime_numbers.sh | 23 +++++++++---------
>  tools/testing/selftests/lib/printf.sh        | 25 ++++++++++----------
>  3 files changed, 35 insertions(+), 38 deletions(-)
>
> diff --git a/tools/testing/selftests/lib/bitmap.sh b/tools/testing/selftests/lib/bitmap.sh
> index 5a90006d1aea..ed4180ea0021 100755
> --- a/tools/testing/selftests/lib/bitmap.sh
> +++ b/tools/testing/selftests/lib/bitmap.sh
> @@ -1,19 +1,18 @@
>  #!/bin/sh
>  # SPDX-License-Identifier: GPL-2.0
>
> -# Kselftest framework requirement - SKIP code is 4.
> -ksft_skip=4
> +module=test_bitmap
> +description="bitmap"
>
> -# Runs bitmap infrastructure tests using test_bitmap kernel module
> -if ! /sbin/modprobe -q -n test_bitmap; then
> -       echo "bitmap: module test_bitmap is not found [SKIP]"
> -       exit $ksft_skip
> -fi
> +#
> +# Shouldn't need to edit anything below here.
> +#
>
> -if /sbin/modprobe -q test_bitmap; then
> -       /sbin/modprobe -q -r test_bitmap
> -       echo "bitmap: ok"
> -else
> -       echo "bitmap: [FAIL]"
> -       exit 1
> +file="kselftest_module.sh"
> +path="../$file"
> +if [[ ! $KBUILD_SRC == "" ]]; then
> +    path="${KBUILD_SRC}/tools/testing/selftests/$file"
>  fi

Can this just be reduced to something like:

. $(dirname $0)/../kselftest_module.sh

call_functions_here ...

> +
> +$path $module $description
> +
> diff --git a/tools/testing/selftests/lib/prime_numbers.sh b/tools/testing/selftests/lib/prime_numbers.sh
> index 78e7483c8d60..6f782386d897 100755
> --- a/tools/testing/selftests/lib/prime_numbers.sh
> +++ b/tools/testing/selftests/lib/prime_numbers.sh
> @@ -2,18 +2,17 @@
>  # SPDX-License-Identifier: GPL-2.0
>  # Checks fast/slow prime_number generation for inconsistencies
>
> -# Kselftest framework requirement - SKIP code is 4.
> -ksft_skip=4
> +module=prime_numbers
> +description="prime_numbers"
>
> -if ! /sbin/modprobe -q -n prime_numbers; then
> -       echo "prime_numbers: module prime_numbers is not found [SKIP]"
> -       exit $ksft_skip
> -fi
> +#
> +# Shouldn't need to edit anything below here.
> +#
>
> -if /sbin/modprobe -q prime_numbers selftest=65536; then
> -       /sbin/modprobe -q -r prime_numbers
> -       echo "prime_numbers: ok"
> -else
> -       echo "prime_numbers: [FAIL]"
> -       exit 1
> +file="kselftest_module.sh"
> +path="../$file"
> +if [[ ! $KBUILD_SRC == "" ]]; then
> +    path="${KBUILD_SRC}/tools/testing/selftests/$file"
>  fi
> +
> +$path $module $description
> diff --git a/tools/testing/selftests/lib/printf.sh b/tools/testing/selftests/lib/printf.sh
> index 45a23e2d64ad..89717915d028 100755
> --- a/tools/testing/selftests/lib/printf.sh
> +++ b/tools/testing/selftests/lib/printf.sh
> @@ -1,19 +1,18 @@
>  #!/bin/sh
>  # SPDX-License-Identifier: GPL-2.0
> -# Runs printf infrastructure using test_printf kernel module
> +# Tests the printf infrastructure using test_printf kernel module.
>
> -# Kselftest framework requirement - SKIP code is 4.
> -ksft_skip=4
> +module=test_printf
> +description="printf"
>
> -if ! /sbin/modprobe -q -n test_printf; then
> -       echo "printf: module test_printf is not found [SKIP]"
> -       exit $ksft_skip
> -fi
> +#
> +# Shouldn't need to edit anything below here.
> +#
>
> -if /sbin/modprobe -q test_printf; then
> -       /sbin/modprobe -q -r test_printf
> -       echo "printf: ok"
> -else
> -       echo "printf: [FAIL]"
> -       exit 1
> +file="kselftest_module.sh"
> +path="../$file"
> +if [[ ! $KBUILD_SRC == "" ]]; then
> +    path="${KBUILD_SRC}/tools/testing/selftests/$file"
>  fi
> +
> +$path $module $description
> --
> 2.20.1
>


-- 
Kees Cook