drivers/firewire/uapi-test.c

   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 // Added at v6.5.
  49 static 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.
  63 static 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
  75 static 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
  83 static struct kunit_suite structure_layout_test_suite = {
  84         .name = "firewire-uapi-structure-layout",
  85         .test_cases = structure_layout_test_cases,
  86 };
  87 kunit_test_suite(structure_layout_test_suite);
  88
  89 MODULE_LICENSE("GPL");