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wifi: cfg80211: add first kunit tests, for element defrag

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Add a couple of tests for element defragmentation, to
see that the function works correctly.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230827135854.e2a5cead1816.I09f0edc19d162b54ee330991c728c1e9aa42ebf6@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2023-08-27 14:05:20 +03:00
parent 43125539fc
commit 730eeb17bb
5 changed files with 182 additions and 0 deletions
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11
net/wireless/Kconfig
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@ -201,6 +201,17 @@ config CFG80211_WEXT_EXPORT
Drivers should select this option if they require cfg80211's
wext compatibility symbols to be exported.
config CFG80211_KUNIT_TEST
tristate "KUnit tests for cfg80211" if !KUNIT_ALL_TESTS
depends on KUNIT
depends on CFG80211
default KUNIT_ALL_TESTS
depends on !KERNEL_6_2
help
Enable this option to test cfg80211 functions with kunit.
If unsure, say N.
endif # CFG80211
config LIB80211

1
net/wireless/Makefile
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@ -4,6 +4,7 @@ obj-$(CONFIG_LIB80211) += lib80211.o
obj-$(CONFIG_LIB80211_CRYPT_WEP) += lib80211_crypt_wep.o
obj-$(CONFIG_LIB80211_CRYPT_CCMP) += lib80211_crypt_ccmp.o
obj-$(CONFIG_LIB80211_CRYPT_TKIP) += lib80211_crypt_tkip.o
obj-y += tests/
obj-$(CONFIG_WEXT_CORE) += wext-core.o
obj-$(CONFIG_WEXT_PROC) += wext-proc.o

3
net/wireless/tests/Makefile Normal file
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@ -0,0 +1,3 @@
cfg80211-tests-y += module.o fragmentation.o
obj-$(CONFIG_CFG80211_KUNIT_TEST) += cfg80211-tests.o

157
net/wireless/tests/fragmentation.c Normal file
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@ -0,0 +1,157 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* KUnit tests for element fragmentation
*
* Copyright (C) 2023 Intel Corporation
*/
#include <linux/ieee80211.h>
#include <net/cfg80211.h>
#include <kunit/test.h>
static void defragment_0(struct kunit *test)
{
ssize_t ret;
static const u8 input[] = {
[0] = WLAN_EID_EXTENSION,
[1] = 254,
[2] = WLAN_EID_EXT_EHT_MULTI_LINK,
[27] = 27,
[123] = 123,
[254 + 2] = WLAN_EID_FRAGMENT,
[254 + 3] = 7,
[254 + 3 + 7] = 0, /* for size */
};
u8 *data = kunit_kzalloc(test, sizeof(input), GFP_KERNEL);
KUNIT_ASSERT_NOT_NULL(test, data);
ret = cfg80211_defragment_element((void *)input,
input, sizeof(input),
data, sizeof(input),
WLAN_EID_FRAGMENT);
KUNIT_EXPECT_EQ(test, ret, 253);
KUNIT_EXPECT_MEMEQ(test, data, input + 3, 253);
}
static void defragment_1(struct kunit *test)
{
ssize_t ret;
static const u8 input[] = {
[0] = WLAN_EID_EXTENSION,
[1] = 255,
[2] = WLAN_EID_EXT_EHT_MULTI_LINK,
[27] = 27,
[123] = 123,
[255 + 2] = WLAN_EID_FRAGMENT,
[255 + 3] = 7,
[255 + 3 + 1] = 0xaa,
[255 + 3 + 8] = WLAN_EID_FRAGMENT, /* not used */
[255 + 3 + 9] = 1,
[255 + 3 + 10] = 0, /* for size */
};
u8 *data = kunit_kzalloc(test, sizeof(input), GFP_KERNEL);
const struct element *elem;
int count = 0;
KUNIT_ASSERT_NOT_NULL(test, data);
for_each_element(elem, input, sizeof(input))
count++;
/* check the elements are right */
KUNIT_ASSERT_EQ(test, count, 3);
ret = cfg80211_defragment_element((void *)input,
input, sizeof(input),
data, sizeof(input),
WLAN_EID_FRAGMENT);
/* this means the last fragment was not used */
KUNIT_EXPECT_EQ(test, ret, 254 + 7);
KUNIT_EXPECT_MEMEQ(test, data, input + 3, 254);
KUNIT_EXPECT_MEMEQ(test, data + 254, input + 255 + 4, 7);
}
static void defragment_2(struct kunit *test)
{
ssize_t ret;
static const u8 input[] = {
[0] = WLAN_EID_EXTENSION,
[1] = 255,
[2] = WLAN_EID_EXT_EHT_MULTI_LINK,
[27] = 27,
[123] = 123,
[257 + 0] = WLAN_EID_FRAGMENT,
[257 + 1] = 255,
[257 + 20] = 0xaa,
[2 * 257 + 0] = WLAN_EID_FRAGMENT,
[2 * 257 + 1] = 1,
[2 * 257 + 2] = 0xcc,
[2 * 257 + 3] = WLAN_EID_FRAGMENT, /* not used */
[2 * 257 + 4] = 1,
[2 * 257 + 5] = 0, /* for size */
};
u8 *data = kunit_kzalloc(test, sizeof(input), GFP_KERNEL);
const struct element *elem;
int count = 0;
KUNIT_ASSERT_NOT_NULL(test, data);
for_each_element(elem, input, sizeof(input))
count++;
/* check the elements are right */
KUNIT_ASSERT_EQ(test, count, 4);
ret = cfg80211_defragment_element((void *)input,
input, sizeof(input),
data, sizeof(input),
WLAN_EID_FRAGMENT);
/* this means the last fragment was not used */
KUNIT_EXPECT_EQ(test, ret, 254 + 255 + 1);
KUNIT_EXPECT_MEMEQ(test, data, input + 3, 254);
KUNIT_EXPECT_MEMEQ(test, data + 254, input + 257 + 2, 255);
KUNIT_EXPECT_MEMEQ(test, data + 254 + 255, input + 2 * 257 + 2, 1);
}
static void defragment_at_end(struct kunit *test)
{
ssize_t ret;
static const u8 input[] = {
[0] = WLAN_EID_EXTENSION,
[1] = 255,
[2] = WLAN_EID_EXT_EHT_MULTI_LINK,
[27] = 27,
[123] = 123,
[255 + 2] = WLAN_EID_FRAGMENT,
[255 + 3] = 7,
[255 + 3 + 7] = 0, /* for size */
};
u8 *data = kunit_kzalloc(test, sizeof(input), GFP_KERNEL);
KUNIT_ASSERT_NOT_NULL(test, data);
ret = cfg80211_defragment_element((void *)input,
input, sizeof(input),
data, sizeof(input),
WLAN_EID_FRAGMENT);
KUNIT_EXPECT_EQ(test, ret, 254 + 7);
KUNIT_EXPECT_MEMEQ(test, data, input + 3, 254);
KUNIT_EXPECT_MEMEQ(test, data + 254, input + 255 + 4, 7);
}
static struct kunit_case element_fragmentation_test_cases[] = {
KUNIT_CASE(defragment_0),
KUNIT_CASE(defragment_1),
KUNIT_CASE(defragment_2),
KUNIT_CASE(defragment_at_end),
{}
};
static struct kunit_suite element_fragmentation = {
.name = "cfg80211-element-defragmentation",
.test_cases = element_fragmentation_test_cases,
};
kunit_test_suite(element_fragmentation);

10
net/wireless/tests/module.c Normal file
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@ -0,0 +1,10 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* This is just module boilerplate for the cfg80211 kunit module.
*
* Copyright (C) 2023 Intel Corporation
*/
#include <linux/module.h>
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("tests for cfg80211");