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Message-ID: <CAGXu5j+=O3C6z7H5j93Z4mQkpS3f0ea_7T+LRQEnRCZCoKX8zw@mail.gmail.com>
Date: Tue, 2 Apr 2019 14:27:21 -0700
From: Kees Cook <keescook@...omium.org>
To: "Tobin C. Harding" <tobin@...nel.org>
Cc: Shuah Khan <shuah@...nel.org>, Jann Horn <jannh@...gle.com>,
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>, Randy Dunlap <rdunlap@...radead.org>,
Rasmus Villemoes <linux@...musvillemoes.dk>, Stephen Rothwell <sfr@...b.auug.org.au>,
Andy Lutomirski <luto@...capital.net>, Daniel Micay <danielmicay@...il.com>,
Arnd Bergmann <arnd@...db.de>, Miguel Ojeda <miguel.ojeda.sandonis@...il.com>,
"Gustavo A. R. Silva" <gustavo@...eddedor.com>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Kernel Hardening <kernel-hardening@...ts.openwall.com>,
"open list:KERNEL SELFTEST FRAMEWORK" <linux-kselftest@...r.kernel.org>, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 2/7] kselftest: Add test runner creation script
On Wed, Mar 6, 2019 at 1:43 PM Tobin C. Harding <tobin@...nel.org> wrote:
>
> Currently if we wish to use kselftest to run tests within a kernel
> module we write a small script to load/unload and do error reporting.
> There are a bunch of these under tools/testing/selftests/lib/ that are
> all identical except for the test name. We can reduce code duplication
> and improve maintainability if we have one version of this. However
> kselftest requires an executable for each test. We can move all the
> script logic to a central script then have each individual test script
> set the module name and call the main script. There is a little bit of
> boilerplate left in each script to handle building/running tests with
> the O=/path/to/out make option.
>
> Add test runner creation script.
>
> Signed-off-by: Tobin C. Harding <tobin@...nel.org>
> ---
> tools/testing/selftests/kselftest_module.sh | 75 +++++++++++++++++++++
> 1 file changed, 75 insertions(+)
> create mode 100755 tools/testing/selftests/kselftest_module.sh
>
> diff --git a/tools/testing/selftests/kselftest_module.sh b/tools/testing/selftests/kselftest_module.sh
> new file mode 100755
> index 000000000000..b5d446738614
> --- /dev/null
> +++ b/tools/testing/selftests/kselftest_module.sh
> @@ -0,0 +1,75 @@
> +#!/bin/sh
> +# SPDX-License-Identifier: GPL-2.0+
> +
> +#
> +# Runs an individual test module. kselftest expects a separate
> +# executable for each test. So test should each have an individial
> +# script that can call this script.
> +#
> +
> +# Individual test scrits should define these:
> +module="" # filename (without the .ko).
> +desc="" # Output prefix.
> +
> +modprobe="/sbin/modprobe"
> +
> +main() {
> + parse_args $@
> + assert_root
> + assert_have_module
> + run_module
> +}
> +
> +parse_args() {
> + script=${0##*/}
> +
> + if [[ ! $# -eq 2 ]]; then
> + echo "Usage: $script <module_name> <description> [FAIL]"
> + exit 1
> + fi
> +
> + module=$1
> + desc=$2
> +}
> +
> +assert_root() {
> + if [[ $EUID -ne 0 ]]; then
> + skip "please run as root"
> + fi
> +}
> +
> +assert_have_module() {
> + if ! $modprobe -q -n $module; then
> + skip "module $module is not found"
> + fi
> +}
> +
> +run_module() {
> + if $modprobe -q $module; then
> + $modprobe -q -r $module
Probably will need a way to pass arguments into the modprobe here, but
otherwise looks fine.
> + say "ok"
> + else
> + fail ""
> + fi
> +}
> +
> +say() {
> + echo "$desc: $1"
> +}
> +
> +
> +fail() {
> + say "$1 [FAIL]" >&2
> + exit 1
> +}
> +
> +skip() {
> + say "$1 [SKIP]" >&2
> + # Kselftest framework requirement - SKIP code is 4.
> + exit 4
> +}
> +
> +#
> +# Main script
> +#
> +main $@
> --
> 2.20.1
>
Reviewed-by: Kees Cook <keescook@...omium.org>
--
Kees Cook
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