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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/drivers/firewire/uapi-test.c
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// SPDX-License-Identifier: GPL-2.0-only

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//

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// uapi_test.c - An application of Kunit to check layout of structures exposed to user space for

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//		 FireWire subsystem.

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//

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// Copyright (c) 2023 Takashi Sakamoto

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#include <kunit/test.h>

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#include <linux/firewire-cdev.h>

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// Known issue added at v2.6.27 kernel.

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static void structure_layout_event_response(struct kunit *test)

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{

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#if defined(CONFIG_X86_32)

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	// 4 bytes alignment for aggregate type including 8 bytes storage types.

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	KUNIT_EXPECT_EQ(test, 20, sizeof(struct fw_cdev_event_response));

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#else

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	// 8 bytes alignment for aggregate type including 8 bytes storage types.

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	KUNIT_EXPECT_EQ(test, 24, sizeof(struct fw_cdev_event_response));

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#endif

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	KUNIT_EXPECT_EQ(test, 0, offsetof(struct fw_cdev_event_response, closure));

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	KUNIT_EXPECT_EQ(test, 8, offsetof(struct fw_cdev_event_response, type));

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	KUNIT_EXPECT_EQ(test, 12, offsetof(struct fw_cdev_event_response, rcode));

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	KUNIT_EXPECT_EQ(test, 16, offsetof(struct fw_cdev_event_response, length));

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	KUNIT_EXPECT_EQ(test, 20, offsetof(struct fw_cdev_event_response, data));

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}

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// Added at v6.5.

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static void structure_layout_event_request3(struct kunit *test)

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{

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	KUNIT_EXPECT_EQ(test, 56, sizeof(struct fw_cdev_event_request3));

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	KUNIT_EXPECT_EQ(test, 0, offsetof(struct fw_cdev_event_request3, closure));

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	KUNIT_EXPECT_EQ(test, 8, offsetof(struct fw_cdev_event_request3, type));

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	KUNIT_EXPECT_EQ(test, 12, offsetof(struct fw_cdev_event_request3, tcode));

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	KUNIT_EXPECT_EQ(test, 16, offsetof(struct fw_cdev_event_request3, offset));

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	KUNIT_EXPECT_EQ(test, 24, offsetof(struct fw_cdev_event_request3, source_node_id));

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	KUNIT_EXPECT_EQ(test, 28, offsetof(struct fw_cdev_event_request3, destination_node_id));

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	KUNIT_EXPECT_EQ(test, 32, offsetof(struct fw_cdev_event_request3, card));

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	KUNIT_EXPECT_EQ(test, 36, offsetof(struct fw_cdev_event_request3, generation));

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	KUNIT_EXPECT_EQ(test, 40, offsetof(struct fw_cdev_event_request3, handle));

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	KUNIT_EXPECT_EQ(test, 44, offsetof(struct fw_cdev_event_request3, length));

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	KUNIT_EXPECT_EQ(test, 48, offsetof(struct fw_cdev_event_request3, tstamp));

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	KUNIT_EXPECT_EQ(test, 56, offsetof(struct fw_cdev_event_request3, data));

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}

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// Added at v6.5.

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static void structure_layout_event_response2(struct kunit *test)

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{

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	KUNIT_EXPECT_EQ(test, 32, sizeof(struct fw_cdev_event_response2));

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	KUNIT_EXPECT_EQ(test, 0, offsetof(struct fw_cdev_event_response2, closure));

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	KUNIT_EXPECT_EQ(test, 8, offsetof(struct fw_cdev_event_response2, type));

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	KUNIT_EXPECT_EQ(test, 12, offsetof(struct fw_cdev_event_response2, rcode));

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	KUNIT_EXPECT_EQ(test, 16, offsetof(struct fw_cdev_event_response2, length));

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	KUNIT_EXPECT_EQ(test, 20, offsetof(struct fw_cdev_event_response2, request_tstamp));

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	KUNIT_EXPECT_EQ(test, 24, offsetof(struct fw_cdev_event_response2, response_tstamp));

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	KUNIT_EXPECT_EQ(test, 32, offsetof(struct fw_cdev_event_response2, data));

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}

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// Added at v6.5.

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static void structure_layout_event_phy_packet2(struct kunit *test)

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{

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	KUNIT_EXPECT_EQ(test, 24, sizeof(struct fw_cdev_event_phy_packet2));

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	KUNIT_EXPECT_EQ(test, 0, offsetof(struct fw_cdev_event_phy_packet2, closure));

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	KUNIT_EXPECT_EQ(test, 8, offsetof(struct fw_cdev_event_phy_packet2, type));

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	KUNIT_EXPECT_EQ(test, 12, offsetof(struct fw_cdev_event_phy_packet2, rcode));

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	KUNIT_EXPECT_EQ(test, 16, offsetof(struct fw_cdev_event_phy_packet2, length));

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	KUNIT_EXPECT_EQ(test, 20, offsetof(struct fw_cdev_event_phy_packet2, tstamp));

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	KUNIT_EXPECT_EQ(test, 24, offsetof(struct fw_cdev_event_phy_packet2, data));

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}

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static struct kunit_case structure_layout_test_cases[] = {

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	KUNIT_CASE(structure_layout_event_response),

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	KUNIT_CASE(structure_layout_event_request3),

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	KUNIT_CASE(structure_layout_event_response2),

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	KUNIT_CASE(structure_layout_event_phy_packet2),

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	{}

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};

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static struct kunit_suite structure_layout_test_suite = {

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	.name = "firewire-uapi-structure-layout",

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	.test_cases = structure_layout_test_cases,

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};

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kunit_test_suite(structure_layout_test_suite);

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MODULE_DESCRIPTION("FireWire UAPI unit test suite");

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MODULE_LICENSE("GPL");

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