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. 12 static 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. 30 static 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 static struct kunit_case structure_layout_test_cases[] = { 49 KUNIT_CASE(structure_layout_event_response), 50 KUNIT_CASE(structure_layout_event_request3), 51 {} 52 }; 53 54 static struct kunit_suite structure_layout_test_suite = { 55 .name = "firewire-uapi-structure-layout", 56 .test_cases = structure_layout_test_cases, 57 }; 58 kunit_test_suite(structure_layout_test_suite); 59