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Message-ID: <CAGXu5jLpC8tGNfa2N3H24eby6j=HMWZKgkQaM=3W8MznLQsAOw@mail.gmail.com>
Date: Tue, 2 Apr 2019 14:32:19 -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 5/7] lib: Use new kselftest header
On Wed, Mar 6, 2019 at 1:43 PM Tobin C. Harding <tobin@...nel.org> wrote:
>
> We just added a new C header file for use with test modules that are
> intended to be run with kselftest. We can reduce code duplication by
> using this header.
>
> Use new kselftest header to reduce code duplication in test_printf and
> test_bitmap test modules.
>
> Signed-off-by: Tobin C. Harding <tobin@...nel.org>
Nice consolidation.
Acked-by: Kees Cook <keescook@...omium.org>
-Kees
> ---
> lib/test_bitmap.c | 20 ++++----------------
> lib/test_printf.c | 23 +++++------------------
> 2 files changed, 9 insertions(+), 34 deletions(-)
>
> diff --git a/lib/test_bitmap.c b/lib/test_bitmap.c
> index 6cd7d0740005..792d90608052 100644
> --- a/lib/test_bitmap.c
> +++ b/lib/test_bitmap.c
> @@ -12,6 +12,8 @@
> #include <linux/slab.h>
> #include <linux/string.h>
>
> +#include "../tools/testing/selftests/kselftest_module.h"
> +
> static unsigned total_tests __initdata;
> static unsigned failed_tests __initdata;
>
> @@ -361,7 +363,7 @@ static void noinline __init test_mem_optimisations(void)
> }
> }
>
> -static int __init test_bitmap_init(void)
> +static void __init selftest(void)
> {
> test_zero_clear();
> test_fill_set();
> @@ -369,22 +371,8 @@ static int __init test_bitmap_init(void)
> test_bitmap_arr32();
> test_bitmap_parselist();
> test_mem_optimisations();
> -
> - if (failed_tests == 0)
> - pr_info("all %u tests passed\n", total_tests);
> - else
> - pr_warn("failed %u out of %u tests\n",
> - failed_tests, total_tests);
> -
> - return failed_tests ? -EINVAL : 0;
> }
>
> -static void __exit test_bitmap_cleanup(void)
> -{
> -}
> -
> -module_init(test_bitmap_init);
> -module_exit(test_bitmap_cleanup);
> -
> +KSTM_MODULE_LOADERS(test_bitmap);
> MODULE_AUTHOR("david decotigny <david.decotigny@...glers.com>");
> MODULE_LICENSE("GPL");
> diff --git a/lib/test_printf.c b/lib/test_printf.c
> index 601e8519319a..f4fcc1c43739 100644
> --- a/lib/test_printf.c
> +++ b/lib/test_printf.c
> @@ -21,6 +21,8 @@
> #include <linux/gfp.h>
> #include <linux/mm.h>
>
> +#include "../tools/testing/selftests/kselftest_module.h"
> +
> #define BUF_SIZE 256
> #define PAD_SIZE 16
> #define FILL_CHAR '$'
> @@ -590,12 +592,11 @@ test_pointer(void)
> flags();
> }
>
> -static int __init
> -test_printf_init(void)
> +static void __init selftest(void)
> {
> alloced_buffer = kmalloc(BUF_SIZE + 2*PAD_SIZE, GFP_KERNEL);
> if (!alloced_buffer)
> - return -ENOMEM;
> + return;
> test_buffer = alloced_buffer + PAD_SIZE;
>
> test_basic();
> @@ -604,22 +605,8 @@ test_printf_init(void)
> test_pointer();
>
> kfree(alloced_buffer);
> -
> - if (failed_tests == 0)
> - pr_info("all %u tests passed\n", total_tests);
> - else
> - pr_warn("failed %u out of %u tests\n", failed_tests, total_tests);
> -
> - return failed_tests ? -EINVAL : 0;
> }
>
> -module_init(test_printf_init);
> -
> -static void __exit test_printf_exit(void)
> -{
> -}
> -
> -module_exit(test_printf_exit);
> -
> +KSTM_MODULE_LOADERS(test_printf);
> MODULE_AUTHOR("Rasmus Villemoes <linux@...musvillemoes.dk>");
> MODULE_LICENSE("GPL");
> --
> 2.20.1
>
--
Kees Cook
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