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Date:   Tue, 27 Oct 2020 10:33:34 -0700
From:   Iurii Zaikin <yzaikin@...gle.com>
To:     Arpitha Raghunandan <98.arpi@...il.com>
Cc:     Brendan Higgins <brendanhiggins@...gle.com>,
        Shuah Khan <skhan@...uxfoundation.org>,
        Marco Elver <elver@...gle.com>,
        "Theodore Ts'o" <tytso@....edu>,
        Andreas Dilger <adilger.kernel@...ger.ca>,
        "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@...r.kernel.org>,
        KUnit Development <kunit-dev@...glegroups.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-kernel-mentees@...ts.linuxfoundation.org,
        Ext4 Developers List <linux-ext4@...r.kernel.org>
Subject: Re: [PATCH v3 2/2] fs: ext4: Modify inode-test.c to use KUnit
 parameterized testing feature

>
> Modify fs/ext4/inode-test.c to use the parameterized testing
> feature of KUnit.
>
> Signed-off-by: Arpitha Raghunandan <98.arpi@...il.com>
> ---
> Changes v2->v3:
> - Marked hardcoded test data const
> - Modification based on latest implementation of KUnit parameterized testing
> Changes v1->v2:
> - Modification based on latest implementation of KUnit parameterized testing
>
>  fs/ext4/inode-test.c | 314 ++++++++++++++++++++++---------------------
>  1 file changed, 158 insertions(+), 156 deletions(-)
>
> diff --git a/fs/ext4/inode-test.c b/fs/ext4/inode-test.c
> index d62d802c9c12..3a449623b775 100644
> --- a/fs/ext4/inode-test.c
> +++ b/fs/ext4/inode-test.c
> @@ -80,6 +80,139 @@ struct timestamp_expectation {
>         bool lower_bound;
>  };
>
> +static const struct timestamp_expectation test_data[] = {
> +       {
> +               .test_case_name = LOWER_BOUND_NEG_NO_EXTRA_BITS_CASE,
> +               .msb_set = true,
> +               .lower_bound = true,
> +               .extra_bits = 0,
> +               .expected = {.tv_sec = -0x80000000LL, .tv_nsec = 0L},
> +       },
> +
> +       {
> +               .test_case_name = UPPER_BOUND_NEG_NO_EXTRA_BITS_CASE,
> +               .msb_set = true,
> +               .lower_bound = false,
> +               .extra_bits = 0,
> +               .expected = {.tv_sec = -1LL, .tv_nsec = 0L},
> +       },
> +
> +       {
> +               .test_case_name = LOWER_BOUND_NONNEG_NO_EXTRA_BITS_CASE,
> +               .msb_set = false,
> +               .lower_bound = true,
> +               .extra_bits = 0,
> +               .expected = {0LL, 0L},
> +       },
> +
> +       {
> +               .test_case_name = UPPER_BOUND_NONNEG_NO_EXTRA_BITS_CASE,
> +               .msb_set = false,
> +               .lower_bound = false,
> +               .extra_bits = 0,
> +               .expected = {.tv_sec = 0x7fffffffLL, .tv_nsec = 0L},
> +       },
> +
> +       {
> +               .test_case_name = LOWER_BOUND_NEG_LO_1_CASE,
> +               .msb_set = true,
> +               .lower_bound = true,
> +               .extra_bits = 1,
> +               .expected = {.tv_sec = 0x80000000LL, .tv_nsec = 0L},
> +       },
> +
> +       {
> +               .test_case_name = UPPER_BOUND_NEG_LO_1_CASE,
> +               .msb_set = true,
> +               .lower_bound = false,
> +               .extra_bits = 1,
> +               .expected = {.tv_sec = 0xffffffffLL, .tv_nsec = 0L},
> +       },
> +
> +       {
> +               .test_case_name = LOWER_BOUND_NONNEG_LO_1_CASE,
> +               .msb_set = false,
> +               .lower_bound = true,
> +               .extra_bits = 1,
> +               .expected = {.tv_sec = 0x100000000LL, .tv_nsec = 0L},
> +       },
> +
> +       {
> +               .test_case_name = UPPER_BOUND_NONNEG_LO_1_CASE,
> +               .msb_set = false,
> +               .lower_bound = false,
> +               .extra_bits = 1,
> +               .expected = {.tv_sec = 0x17fffffffLL, .tv_nsec = 0L},
> +       },
> +
> +       {
> +               .test_case_name = LOWER_BOUND_NEG_HI_1_CASE,
> +               .msb_set = true,
> +               .lower_bound = true,
> +               .extra_bits =  2,
> +               .expected = {.tv_sec = 0x180000000LL, .tv_nsec = 0L},
> +       },
> +
> +       {
> +               .test_case_name = UPPER_BOUND_NEG_HI_1_CASE,
> +               .msb_set = true,
> +               .lower_bound = false,
> +               .extra_bits = 2,
> +               .expected = {.tv_sec = 0x1ffffffffLL, .tv_nsec = 0L},
> +       },
> +
> +       {
> +               .test_case_name = LOWER_BOUND_NONNEG_HI_1_CASE,
> +               .msb_set = false,
> +               .lower_bound = true,
> +               .extra_bits = 2,
> +               .expected = {.tv_sec = 0x200000000LL, .tv_nsec = 0L},
> +       },
> +
> +       {
> +               .test_case_name = UPPER_BOUND_NONNEG_HI_1_CASE,
> +               .msb_set = false,
> +               .lower_bound = false,
> +               .extra_bits = 2,
> +               .expected = {.tv_sec = 0x27fffffffLL, .tv_nsec = 0L},
> +       },
> +
> +       {
> +               .test_case_name = UPPER_BOUND_NONNEG_HI_1_NS_1_CASE,
> +               .msb_set = false,
> +               .lower_bound = false,
> +               .extra_bits = 6,
> +               .expected = {.tv_sec = 0x27fffffffLL, .tv_nsec = 1L},
> +       },
> +
> +       {
> +               .test_case_name = LOWER_BOUND_NONNEG_HI_1_NS_MAX_CASE,
> +               .msb_set = false,
> +               .lower_bound = true,
> +               .extra_bits = 0xFFFFFFFF,
> +               .expected = {.tv_sec = 0x300000000LL,
> +                            .tv_nsec = MAX_NANOSECONDS},
> +       },
> +
> +       {
> +               .test_case_name = LOWER_BOUND_NONNEG_EXTRA_BITS_1_CASE,
> +               .msb_set = false,
> +               .lower_bound = true,
> +               .extra_bits = 3,
> +               .expected = {.tv_sec = 0x300000000LL, .tv_nsec = 0L},
> +       },
> +
> +       {
> +               .test_case_name = UPPER_BOUND_NONNEG_EXTRA_BITS_1_CASE,
> +               .msb_set = false,
> +               .lower_bound = false,
> +               .extra_bits = 3,
> +               .expected = {.tv_sec = 0x37fffffffLL, .tv_nsec = 0L},
> +       }
> +};
> +
> +KUNIT_PARAM_GENERATOR(ext4_inode, test_data);
> +
>  static time64_t get_32bit_time(const struct timestamp_expectation * const test)
>  {
>         if (test->msb_set) {
> @@ -101,166 +234,35 @@ static time64_t get_32bit_time(const struct timestamp_expectation * const test)
>   */
>  static void inode_test_xtimestamp_decoding(struct kunit *test)
>  {
> -       const struct timestamp_expectation test_data[] = {
> -               {
> -                       .test_case_name = LOWER_BOUND_NEG_NO_EXTRA_BITS_CASE,
> -                       .msb_set = true,
> -                       .lower_bound = true,
> -                       .extra_bits = 0,
> -                       .expected = {.tv_sec = -0x80000000LL, .tv_nsec = 0L},
> -               },
> -
> -               {
> -                       .test_case_name = UPPER_BOUND_NEG_NO_EXTRA_BITS_CASE,
> -                       .msb_set = true,
> -                       .lower_bound = false,
> -                       .extra_bits = 0,
> -                       .expected = {.tv_sec = -1LL, .tv_nsec = 0L},
> -               },
> -
> -               {
> -                       .test_case_name = LOWER_BOUND_NONNEG_NO_EXTRA_BITS_CASE,
> -                       .msb_set = false,
> -                       .lower_bound = true,
> -                       .extra_bits = 0,
> -                       .expected = {0LL, 0L},
> -               },
> -
> -               {
> -                       .test_case_name = UPPER_BOUND_NONNEG_NO_EXTRA_BITS_CASE,
> -                       .msb_set = false,
> -                       .lower_bound = false,
> -                       .extra_bits = 0,
> -                       .expected = {.tv_sec = 0x7fffffffLL, .tv_nsec = 0L},
> -               },
> -
> -               {
> -                       .test_case_name = LOWER_BOUND_NEG_LO_1_CASE,
> -                       .msb_set = true,
> -                       .lower_bound = true,
> -                       .extra_bits = 1,
> -                       .expected = {.tv_sec = 0x80000000LL, .tv_nsec = 0L},
> -               },
> -
> -               {
> -                       .test_case_name = UPPER_BOUND_NEG_LO_1_CASE,
> -                       .msb_set = true,
> -                       .lower_bound = false,
> -                       .extra_bits = 1,
> -                       .expected = {.tv_sec = 0xffffffffLL, .tv_nsec = 0L},
> -               },
> -
> -               {
> -                       .test_case_name = LOWER_BOUND_NONNEG_LO_1_CASE,
> -                       .msb_set = false,
> -                       .lower_bound = true,
> -                       .extra_bits = 1,
> -                       .expected = {.tv_sec = 0x100000000LL, .tv_nsec = 0L},
> -               },
> -
> -               {
> -                       .test_case_name = UPPER_BOUND_NONNEG_LO_1_CASE,
> -                       .msb_set = false,
> -                       .lower_bound = false,
> -                       .extra_bits = 1,
> -                       .expected = {.tv_sec = 0x17fffffffLL, .tv_nsec = 0L},
> -               },
> -
> -               {
> -                       .test_case_name = LOWER_BOUND_NEG_HI_1_CASE,
> -                       .msb_set = true,
> -                       .lower_bound = true,
> -                       .extra_bits =  2,
> -                       .expected = {.tv_sec = 0x180000000LL, .tv_nsec = 0L},
> -               },
> -
> -               {
> -                       .test_case_name = UPPER_BOUND_NEG_HI_1_CASE,
> -                       .msb_set = true,
> -                       .lower_bound = false,
> -                       .extra_bits = 2,
> -                       .expected = {.tv_sec = 0x1ffffffffLL, .tv_nsec = 0L},
> -               },
> -
> -               {
> -                       .test_case_name = LOWER_BOUND_NONNEG_HI_1_CASE,
> -                       .msb_set = false,
> -                       .lower_bound = true,
> -                       .extra_bits = 2,
> -                       .expected = {.tv_sec = 0x200000000LL, .tv_nsec = 0L},
> -               },
> -
> -               {
> -                       .test_case_name = UPPER_BOUND_NONNEG_HI_1_CASE,
> -                       .msb_set = false,
> -                       .lower_bound = false,
> -                       .extra_bits = 2,
> -                       .expected = {.tv_sec = 0x27fffffffLL, .tv_nsec = 0L},
> -               },
> -
> -               {
> -                       .test_case_name = UPPER_BOUND_NONNEG_HI_1_NS_1_CASE,
> -                       .msb_set = false,
> -                       .lower_bound = false,
> -                       .extra_bits = 6,
> -                       .expected = {.tv_sec = 0x27fffffffLL, .tv_nsec = 1L},
> -               },
> -
> -               {
> -                       .test_case_name = LOWER_BOUND_NONNEG_HI_1_NS_MAX_CASE,
> -                       .msb_set = false,
> -                       .lower_bound = true,
> -                       .extra_bits = 0xFFFFFFFF,
> -                       .expected = {.tv_sec = 0x300000000LL,
> -                                    .tv_nsec = MAX_NANOSECONDS},
> -               },
> -
> -               {
> -                       .test_case_name = LOWER_BOUND_NONNEG_EXTRA_BITS_1_CASE,
> -                       .msb_set = false,
> -                       .lower_bound = true,
> -                       .extra_bits = 3,
> -                       .expected = {.tv_sec = 0x300000000LL, .tv_nsec = 0L},
> -               },
> -
> -               {
> -                       .test_case_name = UPPER_BOUND_NONNEG_EXTRA_BITS_1_CASE,
> -                       .msb_set = false,
> -                       .lower_bound = false,
> -                       .extra_bits = 3,
> -                       .expected = {.tv_sec = 0x37fffffffLL, .tv_nsec = 0L},
> -               }
> -       };
> -
>         struct timespec64 timestamp;
> -       int i;
> -
> -       for (i = 0; i < ARRAY_SIZE(test_data); ++i) {
> -               timestamp.tv_sec = get_32bit_time(&test_data[i]);
> -               ext4_decode_extra_time(&timestamp,
> -                                      cpu_to_le32(test_data[i].extra_bits));
> -
> -               KUNIT_EXPECT_EQ_MSG(test,
> -                                   test_data[i].expected.tv_sec,
> -                                   timestamp.tv_sec,
> -                                   CASE_NAME_FORMAT,
> -                                   test_data[i].test_case_name,
> -                                   test_data[i].msb_set,
> -                                   test_data[i].lower_bound,
> -                                   test_data[i].extra_bits);
> -               KUNIT_EXPECT_EQ_MSG(test,
> -                                   test_data[i].expected.tv_nsec,
> -                                   timestamp.tv_nsec,
> -                                   CASE_NAME_FORMAT,
> -                                   test_data[i].test_case_name,
> -                                   test_data[i].msb_set,
> -                                   test_data[i].lower_bound,
> -                                   test_data[i].extra_bits);
> -       }
> +
> +       struct timestamp_expectation *test_param =
> +                       (struct timestamp_expectation *)(test->param_values);
> +
> +       timestamp.tv_sec = get_32bit_time(test_param);
> +       ext4_decode_extra_time(&timestamp,
> +                              cpu_to_le32(test_param->extra_bits));
> +
> +       KUNIT_EXPECT_EQ_MSG(test,
> +                           test_param->expected.tv_sec,
> +                           timestamp.tv_sec,
> +                           CASE_NAME_FORMAT,
> +                           test_param->test_case_name,
> +                           test_param->msb_set,
> +                           test_param->lower_bound,
> +                           test_param->extra_bits);
> +       KUNIT_EXPECT_EQ_MSG(test,
> +                           test_param->expected.tv_nsec,
> +                           timestamp.tv_nsec,
> +                           CASE_NAME_FORMAT,
> +                           test_param->test_case_name,
> +                           test_param->msb_set,
> +                           test_param->lower_bound,
> +                           test_param->extra_bits);
>  }
>
>  static struct kunit_case ext4_inode_test_cases[] = {
> -       KUNIT_CASE(inode_test_xtimestamp_decoding),
> +       KUNIT_CASE_PARAM(inode_test_xtimestamp_decoding, ext4_inode_gen_params),
>         {}
>  };
>
> --
> 2.25.1
>

Reviewed-by: Iurii Zaikin <yzaikin@...gle.com>

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