[PATCH v4 2/2] lib/test-string_helpers.c: add string_get_size() tests

From: Vitaly Kuznetsov
Date: Tue Sep 15 2015 - 09:56:00 EST


Add a couple of simple tests for string_get_size(). The last one will hang
the kernel without the 'lib/string_helpers.c: fix infinite loop in
string_get_size()' fix.

Signed-off-by: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>
---
lib/test-string_helpers.c | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)

diff --git a/lib/test-string_helpers.c b/lib/test-string_helpers.c
index 8e376ef..b00fc0a 100644
--- a/lib/test-string_helpers.c
+++ b/lib/test-string_helpers.c
@@ -326,6 +326,30 @@ out:
kfree(out_test);
}

+static __init void test_string_get_size_one(u64 size, u64 blk_size,
+ const enum string_size_units units,
+ const char *exp_result)
+{
+ char buf[16];
+
+ string_get_size(size, blk_size, units, buf, sizeof(buf));
+ if (!memcmp(buf, exp_result, strnlen(exp_result, sizeof(buf) - 1) + 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",
+ size, blk_size, units);
+ pr_warn("expected: %s, got %s\n", exp_result, buf);
+}
+
+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");
+}
+
static int __init test_string_helpers_init(void)
{
unsigned int i;
@@ -344,6 +368,9 @@ 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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