1// SPDX-License-Identifier: GPL-2.0-only 2// 3// uapi_test.c - An application of Kunit to check layout of structures exposed to user space for 4// FireWire subsystem. 5// 6// Copyright (c) 2023 Takashi Sakamoto 7 8#include <kunit/test.h> 9#include <linux/firewire-cdev.h> 10 11// Known issue added at v2.6.27 kernel. 12static void structure_layout_event_response(struct kunit *test) 13{ 14#if defined(CONFIG_X86_32) 15 // 4 bytes alignment for aggregate type including 8 bytes storage types. 16 KUNIT_EXPECT_EQ(test, 20, sizeof(struct fw_cdev_event_response)); 17#else 18 // 8 bytes alignment for aggregate type including 8 bytes storage types. 19 KUNIT_EXPECT_EQ(test, 24, sizeof(struct fw_cdev_event_response)); 20#endif 21 22 KUNIT_EXPECT_EQ(test, 0, offsetof(struct fw_cdev_event_response, closure)); 23 KUNIT_EXPECT_EQ(test, 8, offsetof(struct fw_cdev_event_response, type)); 24 KUNIT_EXPECT_EQ(test, 12, offsetof(struct fw_cdev_event_response, rcode)); 25 KUNIT_EXPECT_EQ(test, 16, offsetof(struct fw_cdev_event_response, length)); 26 KUNIT_EXPECT_EQ(test, 20, offsetof(struct fw_cdev_event_response, data)); 27} 28 29// Added at v6.5. 30static void structure_layout_event_request3(struct kunit *test) 31{ 32 KUNIT_EXPECT_EQ(test, 56, sizeof(struct fw_cdev_event_request3)); 33 34 KUNIT_EXPECT_EQ(test, 0, offsetof(struct fw_cdev_event_request3, closure)); 35 KUNIT_EXPECT_EQ(test, 8, offsetof(struct fw_cdev_event_request3, type)); 36 KUNIT_EXPECT_EQ(test, 12, offsetof(struct fw_cdev_event_request3, tcode)); 37 KUNIT_EXPECT_EQ(test, 16, offsetof(struct fw_cdev_event_request3, offset)); 38 KUNIT_EXPECT_EQ(test, 24, offsetof(struct fw_cdev_event_request3, source_node_id)); 39 KUNIT_EXPECT_EQ(test, 28, offsetof(struct fw_cdev_event_request3, destination_node_id)); 40 KUNIT_EXPECT_EQ(test, 32, offsetof(struct fw_cdev_event_request3, card)); 41 KUNIT_EXPECT_EQ(test, 36, offsetof(struct fw_cdev_event_request3, generation)); 42 KUNIT_EXPECT_EQ(test, 40, offsetof(struct fw_cdev_event_request3, handle)); 43 KUNIT_EXPECT_EQ(test, 44, offsetof(struct fw_cdev_event_request3, length)); 44 KUNIT_EXPECT_EQ(test, 48, offsetof(struct fw_cdev_event_request3, tstamp)); 45 KUNIT_EXPECT_EQ(test, 56, offsetof(struct fw_cdev_event_request3, data)); 46} 47 48// Added at v6.5. 49static void structure_layout_event_response2(struct kunit *test) 50{ 51 KUNIT_EXPECT_EQ(test, 32, sizeof(struct fw_cdev_event_response2)); 52 53 KUNIT_EXPECT_EQ(test, 0, offsetof(struct fw_cdev_event_response2, closure)); 54 KUNIT_EXPECT_EQ(test, 8, offsetof(struct fw_cdev_event_response2, type)); 55 KUNIT_EXPECT_EQ(test, 12, offsetof(struct fw_cdev_event_response2, rcode)); 56 KUNIT_EXPECT_EQ(test, 16, offsetof(struct fw_cdev_event_response2, length)); 57 KUNIT_EXPECT_EQ(test, 20, offsetof(struct fw_cdev_event_response2, request_tstamp)); 58 KUNIT_EXPECT_EQ(test, 24, offsetof(struct fw_cdev_event_response2, response_tstamp)); 59 KUNIT_EXPECT_EQ(test, 32, offsetof(struct fw_cdev_event_response2, data)); 60} 61 62// Added at v6.5. 63static void structure_layout_event_phy_packet2(struct kunit *test) 64{ 65 KUNIT_EXPECT_EQ(test, 24, sizeof(struct fw_cdev_event_phy_packet2)); 66 67 KUNIT_EXPECT_EQ(test, 0, offsetof(struct fw_cdev_event_phy_packet2, closure)); 68 KUNIT_EXPECT_EQ(test, 8, offsetof(struct fw_cdev_event_phy_packet2, type)); 69 KUNIT_EXPECT_EQ(test, 12, offsetof(struct fw_cdev_event_phy_packet2, rcode)); 70 KUNIT_EXPECT_EQ(test, 16, offsetof(struct fw_cdev_event_phy_packet2, length)); 71 KUNIT_EXPECT_EQ(test, 20, offsetof(struct fw_cdev_event_phy_packet2, tstamp)); 72 KUNIT_EXPECT_EQ(test, 24, offsetof(struct fw_cdev_event_phy_packet2, data)); 73} 74 75static struct kunit_case structure_layout_test_cases[] = { 76 KUNIT_CASE(structure_layout_event_response), 77 KUNIT_CASE(structure_layout_event_request3), 78 KUNIT_CASE(structure_layout_event_response2), 79 KUNIT_CASE(structure_layout_event_phy_packet2), 80 {} 81}; 82 83static struct kunit_suite structure_layout_test_suite = { 84 .name = "firewire-uapi-structure-layout", 85 .test_cases = structure_layout_test_cases, 86}; 87kunit_test_suite(structure_layout_test_suite); 88 89MODULE_LICENSE("GPL"); 90