linux-kernel - Re: [PATCH v3 4/4] lib/test-string_helpers.c: add string_get

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Date:	Thu, 29 Oct 2015 23:33:24 +0200
From:	Andy Shevchenko <andy.shevchenko@...il.com>
To:	Vitaly Kuznetsov <vkuznets@...hat.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Rasmus Villemoes <linux@...musvillemoes.dk>,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Ulf Hansson <ulf.hansson@...aro.org>,
	James Bottomley <JBottomley@...n.com>,
	Kees Cook <keescook@...omium.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 4/4] lib/test-string_helpers.c: add string_get_size() tests

On Thu, Oct 29, 2015 at 6:30 PM, Vitaly Kuznetsov <vkuznets@...hat.com> wrote:
> Add a couple of simple tests for string_get_size().
>
> Signed-off-by: Vitaly Kuznetsov <vkuznets@...hat.com>
> ---
>  lib/test-string_helpers.c | 58 +++++++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 58 insertions(+)
>
> diff --git a/lib/test-string_helpers.c b/lib/test-string_helpers.c
> index 8e376ef..4c77b54 100644
> --- a/lib/test-string_helpers.c
> +++ b/lib/test-string_helpers.c
> @@ -326,6 +326,61 @@ out:
>         kfree(out_test);
>  }
>
> +#define string_get_size_maxbuf 16
> +#define test_string_get_size_one(size, blk_size, exp_result10, exp_result2)    \
> +       do {                                                                   \
> +               BUILD_BUG_ON(sizeof(exp_result10) >= string_get_size_maxbuf);  \
> +               BUILD_BUG_ON(sizeof(exp_result2) >= string_get_size_maxbuf);   \
> +               __test_string_get_size((size), (blk_size), (exp_result10),     \
> +                                      (exp_result2));                         \
> +       } while (0)
> +
> +
> +static __init void __test_string_get_size(const u64 size, const u32 blk_size,
> +                                         const char *exp_result10,
> +                                         const char *exp_result2)
> +{
> +       char buf10[string_get_size_maxbuf];
> +       char buf2[string_get_size_maxbuf];
> +
> +       string_get_size(size, blk_size, STRING_UNITS_10, buf10, sizeof(buf10));
> +       string_get_size(size, blk_size, STRING_UNITS_2, buf2, sizeof(buf2));
> +
> +       if (!memcmp(buf10, exp_result10, strlen(exp_result10) + 1))
> +               goto check_stringunits_2;
> +

> +       buf10[sizeof(buf10) - 1] = '\0';
> +
> +       pr_warn("Test 'test_string_get_size' failed!\n");
> +       pr_warn("string_get_size(size = %llu, blk_size = %u, units = %s)\n",
> +               size, blk_size, "STRING_UNITS_10");
> +       pr_warn("expected: '%s', got '%s'\n", exp_result10, buf10);

Looks to me as a helper function

test_string_get_size_pr_err(size, blk_size, units, exp_result, buf, buflen) {}

if (memcmp(buf10, exp_result10, strlen(exp_result10) + 1))
 _pr_err(...);

> +
> +check_stringunits_2:
> +       if (!memcmp(buf2, exp_result2, strlen(exp_result2) + 1))
> +               return;
> +
> +       buf2[sizeof(buf2) - 1] = '\0';
> +
> +       pr_warn("Test 'test_string_get_size' failed!\n");
> +       pr_warn("string_get_size(size = %llu, blk_size = %u, units = %s)\n",
> +               size, blk_size, "STRING_UNITS_2");
> +       pr_warn("expected: '%s', got '%s'\n", exp_result2, buf2);
> +}
> +
> +static __init void test_string_get_size(void)
> +{
> +       test_string_get_size_one(16384, 512, "8.38 MB", "8.00 MiB");
> +       test_string_get_size_one(500118192, 512, "256 GB", "238 GiB");
> +       test_string_get_size_one(8192, 4096, "33.5 MB", "32.0 MiB");
> +       test_string_get_size_one(1100, 1, "1.10 kB", "1.07 KiB");
> +       test_string_get_size_one(3000, 1900, "5.70 MB", "5.43 MiB");
> +       test_string_get_size_one(U64_MAX, 4096, "75.5 ZB", "63.9 ZiB");
> +       test_string_get_size_one(1999, U32_MAX, "8.58 TB", "7.80 TiB");
> +       test_string_get_size_one(1, 512, "512 B", "512 B");
> +       test_string_get_size_one(0, 512, "0 B", "0 B");

> +}
> +
>  static int __init test_string_helpers_init(void)
>  {
>         unsigned int i;
> @@ -344,6 +399,9 @@ static int __init test_string_helpers_init(void)
>         for (i = 0; i < (ESCAPE_ANY_NP | ESCAPE_HEX) + 1; i++)
>                 test_string_escape("escape 1", escape1, i, TEST_STRING_2_DICT_1);
>
> +       /* Test string_get_size() */
> +       test_string_get_size();
> +
>         return -EINVAL;
>  }
>  module_init(test_string_helpers_init);
> --
> 2.4.3
>
> --
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-- 
With Best Regards,
Andy Shevchenko
--
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