Commit 72676bb5 authored by Vitaly Kuznetsov's avatar Vitaly Kuznetsov Committed by Linus Torvalds

lib/test-string_helpers.c: fix and improve string_get_size() tests

Recently added commit 564b026f ("string_helpers: fix precision loss
for some inputs") fixed precision issues for string_get_size() and broke
tests.

Fix and improve them: test both STRING_UNITS_2 and STRING_UNITS_10 at a
time, better failure reporting, test small an huge values.

Fixes: 564b026f ("string_helpers: fix precision loss for some inputs")
Signed-off-by: default avatarVitaly Kuznetsov <vkuznets@redhat.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: James Bottomley <JBottomley@Odin.com>
Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent e3ae1953
......@@ -327,36 +327,67 @@ out:
}
#define string_get_size_maxbuf 16
#define test_string_get_size_one(size, blk_size, units, exp_result) \
#define test_string_get_size_one(size, blk_size, exp_result10, exp_result2) \
do { \
BUILD_BUG_ON(sizeof(exp_result) >= string_get_size_maxbuf); \
__test_string_get_size((size), (blk_size), (units), \
(exp_result)); \
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 u64 blk_size,
const enum string_size_units units,
const char *exp_result)
static __init void test_string_get_size_check(const char *units,
const char *exp,
char *res,
const u64 size,
const u64 blk_size)
{
char buf[string_get_size_maxbuf];
string_get_size(size, blk_size, units, buf, sizeof(buf));
if (!memcmp(buf, exp_result, strlen(exp_result) + 1))
if (!memcmp(res, exp, strlen(exp) + 1))
return;
buf[sizeof(buf) - 1] = '\0';
pr_warn("Test 'test_string_get_size_one' failed!\n");
pr_warn("string_get_size(size = %llu, blk_size = %llu, units = %d\n",
res[string_get_size_maxbuf - 1] = '\0';
pr_warn("Test 'test_string_get_size' failed!\n");
pr_warn("string_get_size(size = %llu, blk_size = %llu, units = %s)\n",
size, blk_size, units);
pr_warn("expected: '%s', got '%s'\n", exp_result, buf);
pr_warn("expected: '%s', got '%s'\n", exp, res);
}
static __init void __test_string_get_size(const u64 size, const u64 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));
test_string_get_size_check("STRING_UNITS_10", exp_result10, buf10,
size, blk_size);
test_string_get_size_check("STRING_UNITS_2", exp_result2, buf2,
size, blk_size);
}
static __init void test_string_get_size(void)
{
test_string_get_size_one(16384, 512, STRING_UNITS_2, "8.00 MiB");
test_string_get_size_one(8192, 4096, STRING_UNITS_10, "32.7 MB");
test_string_get_size_one(1, 512, STRING_UNITS_10, "512 B");
/* small values */
test_string_get_size_one(0, 512, "0 B", "0 B");
test_string_get_size_one(1, 512, "512 B", "512 B");
test_string_get_size_one(1100, 1, "1.10 kB", "1.07 KiB");
/* normal values */
test_string_get_size_one(16384, 512, "8.39 MB", "8.00 MiB");
test_string_get_size_one(500118192, 512, "256 GB", "238 GiB");
test_string_get_size_one(8192, 4096, "33.6 MB", "32.0 MiB");
/* weird block sizes */
test_string_get_size_one(3000, 1900, "5.70 MB", "5.44 MiB");
/* huge values */
test_string_get_size_one(U64_MAX, 4096, "75.6 ZB", "64.0 ZiB");
test_string_get_size_one(4096, U64_MAX, "75.6 ZB", "64.0 ZiB");
}
static int __init test_string_helpers_init(void)
......
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