Re: [PATCH 2/8] lib: test_bitmap: add more start-end:offset/len tests

From: Yury Norov <yury.norov@gmail.com>
To: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	lizefan@huawei.com, Ingo Molnar <mingo@kernel.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	josh@joshtriplett.org, Peter Zijlstra <peterz@infradead.org>,
	"Paul E. McKenney" <paulmck@kernel.org>,
	fweisbec@gmail.com, Rasmus Villemoes <linux@rasmusvillemoes.dk>,
	Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Subject: Re: [PATCH 2/8] lib: test_bitmap: add more start-end:offset/len tests
Date: Tue, 26 Jan 2021 19:03:49 -0800	[thread overview]
Message-ID: <CAAH8bW9kE03eYdAeEQPnogBHeBfGTbyj5teDEfn2wxFZME5x-Q@mail.gmail.com> (raw)
In-Reply-To: <20210126171141.122639-3-paul.gortmaker@windriver.com>

On Tue, Jan 26, 2021 at 9:12 AM Paul Gortmaker
<paul.gortmaker@windriver.com> wrote:
>
> There are inputs to bitmap_parselist() that would probably never
> be entered manually by a person, but might result from some kind of
> automated input generator.  Things like ranges of length 1, or group
> lengths longer than nbits, overlaps, or offsets of zero.
>
> Adding these tests serve two purposes:
>
> 1) document what might seem odd but nonetheless valid input.
>
> 2) don't regress from what we currently accept as valid.
>
> Cc: Yury Norov <yury.norov@gmail.com>
> Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
> Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
> ---
>  lib/test_bitmap.c | 22 ++++++++++++++++++++++
>  1 file changed, 22 insertions(+)
>
> diff --git a/lib/test_bitmap.c b/lib/test_bitmap.c
> index 3d2cd3b1de84..807d1e8dd59c 100644
> --- a/lib/test_bitmap.c
> +++ b/lib/test_bitmap.c
> @@ -35,6 +35,8 @@ static const unsigned long exp1[] __initconst = {
>         BITMAP_FROM_U64(0x3333333311111111ULL),
>         BITMAP_FROM_U64(0xffffffff77777777ULL),
>         BITMAP_FROM_U64(0),
> +       BITMAP_FROM_U64(0x00008000),
> +       BITMAP_FROM_U64(0x80000000),
>  };
>
>  static const unsigned long exp2[] __initconst = {
> @@ -335,6 +337,26 @@ static const struct test_bitmap_parselist parselist_tests[] __initconst = {
>         {0, " ,  ,,  , ,   ",           &exp1[12 * step], 8, 0},
>         {0, " ,  ,,  , ,   \n",         &exp1[12 * step], 8, 0},
>
> +       {0, "0-0",                      &exp1[0], 32, 0},
> +       {0, "1-1",                      &exp1[1 * step], 32, 0},
> +       {0, "15-15",                    &exp1[13 * step], 32, 0},
> +       {0, "31-31",                    &exp1[14 * step], 32, 0},
> +
> +       {0, "0-0:0/1",                  &exp1[12 * step], 32, 0},
> +       {0, "0-0:1/1",                  &exp1[0], 32, 0},
> +       {0, "0-0:1/31",                 &exp1[0], 32, 0},
> +       {0, "0-0:31/31",                &exp1[0], 32, 0},
> +       {0, "1-1:1/1",                  &exp1[1 * step], 32, 0},
> +       {0, "0-15:16/31",               &exp1[2 * step], 32, 0},
> +       {0, "15-15:1/2",                &exp1[13 * step], 32, 0},
> +       {0, "15-15:31/31",              &exp1[13 * step], 32, 0},
> +       {0, "15-31:1/31",               &exp1[13 * step], 32, 0},
> +       {0, "16-31:16/31",              &exp1[3 * step], 32, 0},
> +       {0, "31-31:31/31",              &exp1[14 * step], 32, 0},
> +
> +       {0, "0-31:1/3,1-31:1/3,2-31:1/3",       &exp1[8 * step], 32, 0},
> +       {0, "1-10:8/12,8-31:24/29,0-31:0/3",    &exp1[9 * step], 32, 0},
> +
>         {-EINVAL, "-1", NULL, 8, 0},
>         {-EINVAL, "-0", NULL, 8, 0},
>         {-EINVAL, "10-1", NULL, 8, 0},  /* (start > end) ; also ERANGE */
> --
> 2.17.1

Acked-by: Yury Norov <yury.norov@gmail.com>