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https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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Takashi Sakamoto
ab2a823af3
The bus reset event structure exposed through the UAPI has a different size depending on the target architecture. Extra care is required when copying it to/from userspace. Add a KUnit test for the structure to ensure that it has the expected size and offsets. Link: https://lore.kernel.org/r/20260920071501.77785-6-o-takashi@sakamocchi.jp Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
111 lines
5.0 KiB
C
111 lines
5.0 KiB
C
// 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 void structure_layout_event_bus_reset(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, 36, sizeof(struct fw_cdev_event_bus_reset));
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#else
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KUNIT_EXPECT_EQ(test, 40, sizeof(struct fw_cdev_event_bus_reset));
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#endif
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KUNIT_EXPECT_EQ(test, 0, offsetof(struct fw_cdev_event_bus_reset, closure));
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KUNIT_EXPECT_EQ(test, 8, offsetof(struct fw_cdev_event_bus_reset, type));
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KUNIT_EXPECT_EQ(test, 12, offsetof(struct fw_cdev_event_bus_reset, node_id));
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KUNIT_EXPECT_EQ(test, 16, offsetof(struct fw_cdev_event_bus_reset, local_node_id));
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KUNIT_EXPECT_EQ(test, 20, offsetof(struct fw_cdev_event_bus_reset, bm_node_id));
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KUNIT_EXPECT_EQ(test, 24, offsetof(struct fw_cdev_event_bus_reset, irm_node_id));
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KUNIT_EXPECT_EQ(test, 28, offsetof(struct fw_cdev_event_bus_reset, root_node_id));
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KUNIT_EXPECT_EQ(test, 32, offsetof(struct fw_cdev_event_bus_reset, generation));
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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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KUNIT_CASE(structure_layout_event_bus_reset),
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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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