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-rw-r--r--drivers/firewire/uapi-test.c89
1 files changed, 89 insertions, 0 deletions
diff --git a/drivers/firewire/uapi-test.c b/drivers/firewire/uapi-test.c
new file mode 100644
index 0000000000..2fcbede4fa
--- /dev/null
+++ b/drivers/firewire/uapi-test.c
@@ -0,0 +1,89 @@
+// SPDX-License-Identifier: GPL-2.0-only
+//
+// uapi_test.c - An application of Kunit to check layout of structures exposed to user space for
+// FireWire subsystem.
+//
+// Copyright (c) 2023 Takashi Sakamoto
+
+#include <kunit/test.h>
+#include <linux/firewire-cdev.h>
+
+// Known issue added at v2.6.27 kernel.
+static void structure_layout_event_response(struct kunit *test)
+{
+#if defined(CONFIG_X86_32)
+ // 4 bytes alignment for aggregate type including 8 bytes storage types.
+ KUNIT_EXPECT_EQ(test, 20, sizeof(struct fw_cdev_event_response));
+#else
+ // 8 bytes alignment for aggregate type including 8 bytes storage types.
+ KUNIT_EXPECT_EQ(test, 24, sizeof(struct fw_cdev_event_response));
+#endif
+
+ KUNIT_EXPECT_EQ(test, 0, offsetof(struct fw_cdev_event_response, closure));
+ KUNIT_EXPECT_EQ(test, 8, offsetof(struct fw_cdev_event_response, type));
+ KUNIT_EXPECT_EQ(test, 12, offsetof(struct fw_cdev_event_response, rcode));
+ KUNIT_EXPECT_EQ(test, 16, offsetof(struct fw_cdev_event_response, length));
+ KUNIT_EXPECT_EQ(test, 20, offsetof(struct fw_cdev_event_response, data));
+}
+
+// Added at v6.5.
+static void structure_layout_event_request3(struct kunit *test)
+{
+ KUNIT_EXPECT_EQ(test, 56, sizeof(struct fw_cdev_event_request3));
+
+ KUNIT_EXPECT_EQ(test, 0, offsetof(struct fw_cdev_event_request3, closure));
+ KUNIT_EXPECT_EQ(test, 8, offsetof(struct fw_cdev_event_request3, type));
+ KUNIT_EXPECT_EQ(test, 12, offsetof(struct fw_cdev_event_request3, tcode));
+ KUNIT_EXPECT_EQ(test, 16, offsetof(struct fw_cdev_event_request3, offset));
+ KUNIT_EXPECT_EQ(test, 24, offsetof(struct fw_cdev_event_request3, source_node_id));
+ KUNIT_EXPECT_EQ(test, 28, offsetof(struct fw_cdev_event_request3, destination_node_id));
+ KUNIT_EXPECT_EQ(test, 32, offsetof(struct fw_cdev_event_request3, card));
+ KUNIT_EXPECT_EQ(test, 36, offsetof(struct fw_cdev_event_request3, generation));
+ KUNIT_EXPECT_EQ(test, 40, offsetof(struct fw_cdev_event_request3, handle));
+ KUNIT_EXPECT_EQ(test, 44, offsetof(struct fw_cdev_event_request3, length));
+ KUNIT_EXPECT_EQ(test, 48, offsetof(struct fw_cdev_event_request3, tstamp));
+ KUNIT_EXPECT_EQ(test, 56, offsetof(struct fw_cdev_event_request3, data));
+}
+
+// Added at v6.5.
+static void structure_layout_event_response2(struct kunit *test)
+{
+ KUNIT_EXPECT_EQ(test, 32, sizeof(struct fw_cdev_event_response2));
+
+ KUNIT_EXPECT_EQ(test, 0, offsetof(struct fw_cdev_event_response2, closure));
+ KUNIT_EXPECT_EQ(test, 8, offsetof(struct fw_cdev_event_response2, type));
+ KUNIT_EXPECT_EQ(test, 12, offsetof(struct fw_cdev_event_response2, rcode));
+ KUNIT_EXPECT_EQ(test, 16, offsetof(struct fw_cdev_event_response2, length));
+ KUNIT_EXPECT_EQ(test, 20, offsetof(struct fw_cdev_event_response2, request_tstamp));
+ KUNIT_EXPECT_EQ(test, 24, offsetof(struct fw_cdev_event_response2, response_tstamp));
+ KUNIT_EXPECT_EQ(test, 32, offsetof(struct fw_cdev_event_response2, data));
+}
+
+// Added at v6.5.
+static void structure_layout_event_phy_packet2(struct kunit *test)
+{
+ KUNIT_EXPECT_EQ(test, 24, sizeof(struct fw_cdev_event_phy_packet2));
+
+ KUNIT_EXPECT_EQ(test, 0, offsetof(struct fw_cdev_event_phy_packet2, closure));
+ KUNIT_EXPECT_EQ(test, 8, offsetof(struct fw_cdev_event_phy_packet2, type));
+ KUNIT_EXPECT_EQ(test, 12, offsetof(struct fw_cdev_event_phy_packet2, rcode));
+ KUNIT_EXPECT_EQ(test, 16, offsetof(struct fw_cdev_event_phy_packet2, length));
+ KUNIT_EXPECT_EQ(test, 20, offsetof(struct fw_cdev_event_phy_packet2, tstamp));
+ KUNIT_EXPECT_EQ(test, 24, offsetof(struct fw_cdev_event_phy_packet2, data));
+}
+
+static struct kunit_case structure_layout_test_cases[] = {
+ KUNIT_CASE(structure_layout_event_response),
+ KUNIT_CASE(structure_layout_event_request3),
+ KUNIT_CASE(structure_layout_event_response2),
+ KUNIT_CASE(structure_layout_event_phy_packet2),
+ {}
+};
+
+static struct kunit_suite structure_layout_test_suite = {
+ .name = "firewire-uapi-structure-layout",
+ .test_cases = structure_layout_test_cases,
+};
+kunit_test_suite(structure_layout_test_suite);
+
+MODULE_LICENSE("GPL");