From: Johannes Berg <johannes.berg@xxxxxxxxx>
Add a unit test for the parsing of a fragmented sta profile
sub-element inside a fragmented multi-link element.
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
Signed-off-by: Gregory Greenman <gregory.greenman@xxxxxxxxx>
---
net/mac80211/Kconfig | 11 ++++
net/mac80211/Makefile | 2 +
net/mac80211/tests/Makefile | 3 ++
net/mac80211/tests/elems.c | 101 ++++++++++++++++++++++++++++++++++++
net/mac80211/tests/module.c | 10 ++++
net/mac80211/util.c | 3 ++
6 files changed, 130 insertions(+)
create mode 100644 net/mac80211/tests/Makefile
create mode 100644 net/mac80211/tests/elems.c
create mode 100644 net/mac80211/tests/module.c
diff --git a/net/mac80211/Kconfig b/net/mac80211/Kconfig
index 51ec8256b7fa..037ab74f5ade 100644
--- a/net/mac80211/Kconfig
+++ b/net/mac80211/Kconfig
@@ -57,6 +57,17 @@ endif
comment "Some wireless drivers require a rate control algorithm"
depends on MAC80211 && MAC80211_HAS_RC=n
+config MAC80211_KUNIT_TEST
+ tristate "KUnit tests for mac80211" if !KUNIT_ALL_TESTS
+ depends on KUNIT
+ depends on MAC80211
+ default KUNIT_ALL_TESTS
+ depends on !KERNEL_6_2
+ help
+ Enable this option to test mac80211 internals with kunit.
+
+ If unsure, say N.
+
config MAC80211_MESH
bool "Enable mac80211 mesh networking support"
depends on MAC80211
diff --git a/net/mac80211/Makefile b/net/mac80211/Makefile
index b8de44da1fb8..c9eb52768133 100644
--- a/net/mac80211/Makefile
+++ b/net/mac80211/Makefile
@@ -65,4 +65,6 @@ rc80211_minstrel-$(CONFIG_MAC80211_DEBUGFS) += \
mac80211-$(CONFIG_MAC80211_RC_MINSTREL) += $(rc80211_minstrel-y)
+obj-y += tests/
+
ccflags-y += -DDEBUG
diff --git a/net/mac80211/tests/Makefile b/net/mac80211/tests/Makefile
new file mode 100644
index 000000000000..4814584f8a14
--- /dev/null
+++ b/net/mac80211/tests/Makefile
@@ -0,0 +1,3 @@
+mac80211-tests-y += module.o elems.o
+
+obj-$(CONFIG_MAC80211_KUNIT_TEST) += mac80211-tests.o
diff --git a/net/mac80211/tests/elems.c b/net/mac80211/tests/elems.c
new file mode 100644
index 000000000000..997d0cd27b2d
--- /dev/null
+++ b/net/mac80211/tests/elems.c
@@ -0,0 +1,101 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * KUnit tests for element parsing
+ *
+ * Copyright (C) 2023 Intel Corporation
+ */
+#include <kunit/test.h>
+#include "../ieee80211_i.h"
+
+MODULE_IMPORT_NS(EXPORTED_FOR_KUNIT_TESTING);
+
+static void mle_defrag(struct kunit *test)
+{
+ struct ieee80211_elems_parse_params parse_params = {
+ .link_id = 12,
+ .from_ap = true,
+ };
+ struct ieee802_11_elems *parsed;
+ struct sk_buff *skb;
+ u8 *len_mle, *len_prof;
+ int i;
+
+ skb = alloc_skb(1024, GFP_KERNEL);
+ KUNIT_ASSERT_NOT_NULL(test, skb);
+
+ if (skb_pad(skb, skb_tailroom(skb))) {
+ KUNIT_FAIL(test, "failed to pad skb");
+ return;
+ }
+
+ /* build a multi-link element */
+ skb_put_u8(skb, WLAN_EID_EXTENSION);
+ len_mle = skb_put(skb, 1);
+ skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK);
+
+ put_unaligned_le16(IEEE80211_ML_CONTROL_TYPE_BASIC,
+ skb_put(skb, 2));
+ /* struct ieee80211_mle_basic_common_info */
+ skb_put_u8(skb, 7); /* includes len field */
+ skb_put_data(skb, "\x00\x00\x00\x00\x00\x00", ETH_ALEN); /* MLD addr */
+
+ /* with a STA profile inside */
+ skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE);
+ len_prof = skb_put(skb, 1);
+ put_unaligned_le16(IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE |
+ parse_params.link_id,
+ skb_put(skb, 2));
+ skb_put_u8(skb, 1); /* fake sta_info_len - includes itself */
+ /* put a bunch of useless elements into it */
+ for (i = 0; i < 20; i++) {
+ skb_put_u8(skb, WLAN_EID_SSID);
+ skb_put_u8(skb, 20);
+ skb_put(skb, 20);
+ }
+
+ /* fragment STA profile */
+ ieee80211_fragment_element(skb, len_prof,
+ IEEE80211_MLE_SUBELEM_FRAGMENT);
+ /* fragment MLE */
+ ieee80211_fragment_element(skb, len_mle, WLAN_EID_FRAGMENT);
+
+ parse_params.start = skb->data;
+ parse_params.len = skb->len;
+ parsed = ieee802_11_parse_elems_full(&parse_params);
+ /* should return ERR_PTR or valid, not NULL */
+ KUNIT_EXPECT_NOT_NULL(test, parsed);
+
+ if (IS_ERR_OR_NULL(parsed))
+ goto free_skb;
+
+ KUNIT_EXPECT_NOT_NULL(test, parsed->ml_basic_elem);
+ KUNIT_EXPECT_EQ(test,
+ parsed->ml_basic_len,
+ 2 /* control */ +
+ 7 /* common info */ +
+ 2 /* sta profile element header */ +
+ 3 /* sta profile header */ +
+ 20 * 22 /* sta profile data */ +
+ 2 /* sta profile fragment element */);
+ KUNIT_EXPECT_NOT_NULL(test, parsed->prof);
+ KUNIT_EXPECT_EQ(test,
+ parsed->sta_prof_len,
+ 3 /* sta profile header */ +
+ 20 * 22 /* sta profile data */);
+
+ kfree(parsed);
+free_skb:
+ kfree_skb(skb);
+}
+
+static struct kunit_case element_parsing_test_cases[] = {
+ KUNIT_CASE(mle_defrag),
+ {}
+};
+
+static struct kunit_suite element_parsing = {
+ .name = "mac80211-element-parsing",
+ .test_cases = element_parsing_test_cases,
+};
+
+kunit_test_suite(element_parsing);
diff --git a/net/mac80211/tests/module.c b/net/mac80211/tests/module.c
new file mode 100644
index 000000000000..9d05f2943935
--- /dev/null
+++ b/net/mac80211/tests/module.c
@@ -0,0 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * This is just module boilerplate for the mac80211 kunit module.
+ *
+ * Copyright (C) 2023 Intel Corporation
+ */
+#include <linux/module.h>
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("tests for mac80211");
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index 8a6917cf63cf..d430093d14af 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -24,6 +24,7 @@
#include <net/net_namespace.h>
#include <net/cfg80211.h>
#include <net/rtnetlink.h>
+#include <kunit/visibility.h>
#include "ieee80211_i.h"
#include "driver-ops.h"
@@ -1654,6 +1655,7 @@ ieee802_11_parse_elems_full(struct ieee80211_elems_parse_params *params)
return elems;
}
+EXPORT_SYMBOL_IF_KUNIT(ieee802_11_parse_elems_full);
void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
struct ieee80211_tx_queue_params
@@ -5146,3 +5148,4 @@ void ieee80211_fragment_element(struct sk_buff *skb, u8 *len_pos, u8 frag_id)
*len_pos = elem_len;
}
+EXPORT_SYMBOL_IF_KUNIT(ieee80211_fragment_element);
--
2.38.1
