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string: Prepare to merge strscpy_kunit.c into string_kunit.c

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In preparation for moving the strscpy_kunit.c tests into string_kunit.c,
rename "tc" to "strscpy_check" for better readability.

Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Tested-by: Ivan Orlov <ivan.orlov0322@gmail.com>
Link: https://lore.kernel.org/r/20240419140155.3028912-1-keescook@chromium.org
Signed-off-by: Kees Cook <keescook@chromium.org>
This commit is contained in:
Kees Cook 2024-04-19 07:01:50 -07:00
parent 9259a47216
commit b03442f761
1 changed files with 26 additions and 25 deletions
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51
lib/strscpy_kunit.c
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@ -8,22 +8,23 @@
#include <kunit/test.h>
#include <linux/string.h>
/*
* tc() - Run a specific test case.
/**
* strscpy_check() - Run a specific test case.
* @test: KUnit test context pointer
* @src: Source string, argument to strscpy_pad()
* @count: Size of destination buffer, argument to strscpy_pad()
* @expected: Expected return value from call to strscpy_pad()
* @terminator: 1 if there should be a terminating null byte 0 otherwise.
* @chars: Number of characters from the src string expected to be
* written to the dst buffer.
* @terminator: 1 if there should be a terminating null byte 0 otherwise.
* @pad: Number of pad characters expected (in the tail of dst buffer).
* (@pad does not include the null terminator byte.)
*
* Calls strscpy_pad() and verifies the return value and state of the
* destination buffer after the call returns.
*/
static void tc(struct kunit *test, char *src, int count, int expected,
int chars, int terminator, int pad)
static void strscpy_check(struct kunit *test, char *src, int count,
int expected, int chars, int terminator, int pad)
{
int nr_bytes_poison;
int max_expected;
@ -79,12 +80,12 @@ static void tc(struct kunit *test, char *src, int count, int expected,
}
}
static void strscpy_test(struct kunit *test)
static void test_strscpy(struct kunit *test)
{
char dest[8];
/*
* tc() uses a destination buffer of size 6 and needs at
* strscpy_check() uses a destination buffer of size 6 and needs at
* least 2 characters spare (one for null and one to check for
* overflow). This means we should only call tc() with
* strings up to a maximum of 4 characters long and 'count'
@ -92,27 +93,27 @@ static void strscpy_test(struct kunit *test)
* the buffer size in tc().
*/
/* tc(test, src, count, expected, chars, terminator, pad) */
tc(test, "a", 0, -E2BIG, 0, 0, 0);
tc(test, "", 0, -E2BIG, 0, 0, 0);
/* strscpy_check(test, src, count, expected, chars, terminator, pad) */
strscpy_check(test, "a", 0, -E2BIG, 0, 0, 0);
strscpy_check(test, "", 0, -E2BIG, 0, 0, 0);
tc(test, "a", 1, -E2BIG, 0, 1, 0);
tc(test, "", 1, 0, 0, 1, 0);
strscpy_check(test, "a", 1, -E2BIG, 0, 1, 0);
strscpy_check(test, "", 1, 0, 0, 1, 0);
tc(test, "ab", 2, -E2BIG, 1, 1, 0);
tc(test, "a", 2, 1, 1, 1, 0);
tc(test, "", 2, 0, 0, 1, 1);
strscpy_check(test, "ab", 2, -E2BIG, 1, 1, 0);
strscpy_check(test, "a", 2, 1, 1, 1, 0);
strscpy_check(test, "", 2, 0, 0, 1, 1);
tc(test, "abc", 3, -E2BIG, 2, 1, 0);
tc(test, "ab", 3, 2, 2, 1, 0);
tc(test, "a", 3, 1, 1, 1, 1);
tc(test, "", 3, 0, 0, 1, 2);
strscpy_check(test, "abc", 3, -E2BIG, 2, 1, 0);
strscpy_check(test, "ab", 3, 2, 2, 1, 0);
strscpy_check(test, "a", 3, 1, 1, 1, 1);
strscpy_check(test, "", 3, 0, 0, 1, 2);
tc(test, "abcd", 4, -E2BIG, 3, 1, 0);
tc(test, "abc", 4, 3, 3, 1, 0);
tc(test, "ab", 4, 2, 2, 1, 1);
tc(test, "a", 4, 1, 1, 1, 2);
tc(test, "", 4, 0, 0, 1, 3);
strscpy_check(test, "abcd", 4, -E2BIG, 3, 1, 0);
strscpy_check(test, "abc", 4, 3, 3, 1, 0);
strscpy_check(test, "ab", 4, 2, 2, 1, 1);
strscpy_check(test, "a", 4, 1, 1, 1, 2);
strscpy_check(test, "", 4, 0, 0, 1, 3);
/* Compile-time-known source strings. */
KUNIT_EXPECT_EQ(test, strscpy(dest, "", ARRAY_SIZE(dest)), 0);
@ -127,7 +128,7 @@ static void strscpy_test(struct kunit *test)
}
static struct kunit_case strscpy_test_cases[] = {
KUNIT_CASE(strscpy_test),
KUNIT_CASE(test_strscpy),
{}
};