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// SPDX-License-Identifier: GPL-2.0+
/*
* efi_selftest_devicepath_util
*
* Copyright (c) 2018 Heinrich Schuchardt <xypron.glpk@gmx.de>
*
* This unit test checks the device path utilities protocol.
*/
#include <efi_selftest.h>
static struct efi_boot_services *boottime;
static efi_guid_t guid_device_path_utilities_protocol =
EFI_DEVICE_PATH_UTILITIES_PROTOCOL_GUID;
struct efi_device_path_utilities_protocol *dpu;
/*
* Setup unit test.
*
* Locate the device path utilities protocol.
*
* @handle: handle of the loaded image
* @systable: system table
*/
static int setup(const efi_handle_t img_handle,
const struct efi_system_table *systable)
{
int ret;
boottime = systable->boottime;
ret = boottime->locate_protocol(&guid_device_path_utilities_protocol,
NULL, (void **)&dpu);
if (ret != EFI_SUCCESS) {
dpu = NULL;
efi_st_error(
"Device path to text protocol is not available.\n");
return EFI_ST_FAILURE;
}
return EFI_ST_SUCCESS;
}
/*
* Create a device path consisting of a single media device node followed by an
* end node.
*
* @length: length of the media device node
* @dp: device path
* @return: status code
*/
static int create_single_node_device_path(unsigned int length,
struct efi_device_path **dp)
{
struct efi_device_path *node;
efi_uintn_t len;
int ret;
node = dpu->create_device_node(DEVICE_PATH_TYPE_MEDIA_DEVICE,
DEVICE_PATH_SUB_TYPE_FILE_PATH, length);
if (!node) {
efi_st_error("CreateDeviceNode failed\n");
return EFI_ST_FAILURE;
}
*dp = dpu->append_device_node(NULL, node);
if (!*dp) {
efi_st_error("AppendDeviceNode failed\n");
return EFI_ST_FAILURE;
}
ret = boottime->free_pool(node);
if (ret != EFI_ST_SUCCESS) {
efi_st_error("FreePool failed\n");
return EFI_ST_FAILURE;
}
len = dpu->get_device_path_size(*dp);
if (len != length + 4) {
efi_st_error("Wrong device path length %u, expected %u\n",
(unsigned int)len, length);
return EFI_ST_FAILURE;
}
return EFI_ST_SUCCESS;
}
/*
* Execute unit test.
*
* In the test device paths are created, copied, and concatenated. The device
* path length is used as a measure of success.
*/
static int execute(void)
{
struct efi_device_path *dp1;
struct efi_device_path *dp2;
struct efi_device_path *dp3;
efi_uintn_t len;
int ret;
/* IsDevicePathMultiInstance(NULL) */
if (dpu->is_device_path_multi_instance(NULL)) {
efi_st_error("IsDevicePathMultiInstance(NULL) returned true\n");
return EFI_ST_FAILURE;
}
/* GetDevicePathSize(NULL) */
len = dpu->get_device_path_size(NULL);
if (len) {
efi_st_error("Wrong device path length %u, expected 0\n",
(unsigned int)len);
return EFI_ST_FAILURE;
}
/* DuplicateDevicePath(NULL) */
dp1 = dpu->duplicate_device_path(NULL);
if (dp1) {
efi_st_error("DuplicateDevicePath(NULL) failed\n");
return EFI_ST_FAILURE;
}
/* AppendDevicePath(NULL, NULL) */
dp1 = dpu->append_device_path(NULL, NULL);
if (!dp1) {
efi_st_error("AppendDevicePath(NULL, NULL) failed\n");
return EFI_ST_FAILURE;
}
len = dpu->get_device_path_size(dp1);
if (len != 4) {
efi_st_error("Wrong device path length %u, expected 4\n",
(unsigned int)len);
return EFI_ST_FAILURE;
}
ret = boottime->free_pool(dp1);
if (ret != EFI_ST_SUCCESS) {
efi_st_error("FreePool failed\n");
return EFI_ST_FAILURE;
}
/* CreateDeviceNode */
ret = create_single_node_device_path(21, &dp1);
if (ret != EFI_ST_SUCCESS)
return ret;
ret = create_single_node_device_path(17, &dp2);
if (ret != EFI_ST_SUCCESS)
return ret;
/* AppendDevicePath */
dp3 = dpu->append_device_path(dp1, dp2);
if (!dp3) {
efi_st_error("AppendDevicePath failed\n");
return EFI_ST_FAILURE;
}
if (dp3 == dp1 || dp3 == dp2) {
efi_st_error("AppendDevicePath reused buffer\n");
return EFI_ST_FAILURE;
}
len = dpu->get_device_path_size(dp3);
/* 21 + 17 + 4 */
if (len != 42) {
efi_st_error("Wrong device path length %u, expected 42\n",
(unsigned int)len);
return EFI_ST_FAILURE;
}
ret = boottime->free_pool(dp2);
if (ret != EFI_ST_SUCCESS) {
efi_st_error("FreePool failed\n");
return EFI_ST_FAILURE;
}
/* AppendDeviceNode */
dp2 = dpu->append_device_node(dp1, dp3);
if (!dp2) {
efi_st_error("AppendDevicePath failed\n");
return EFI_ST_FAILURE;
}
len = dpu->get_device_path_size(dp2);
/* 21 + 21 + 4 */
if (len != 46) {
printf("%s(%d) %s\n", __FILE__, __LINE__, __func__);
efi_st_error("Wrong device path length %u, expected 46\n",
(unsigned int)len);
return EFI_ST_FAILURE;
}
ret = boottime->free_pool(dp1);
if (ret != EFI_ST_SUCCESS) {
efi_st_error("FreePool failed\n");
return EFI_ST_FAILURE;
}
/* IsDevicePathMultiInstance */
if (dpu->is_device_path_multi_instance(dp2)) {
printf("%s(%d) %s\n", __FILE__, __LINE__, __func__);
efi_st_error("IsDevicePathMultiInstance returned true\n");
return EFI_ST_FAILURE;
}
/* AppendDevicePathInstance */
dp1 = dpu->append_device_path_instance(dp2, dp3);
if (!dp1) {
efi_st_error("AppendDevicePathInstance failed\n");
return EFI_ST_FAILURE;
}
len = dpu->get_device_path_size(dp1);
/* 46 + 42 */
if (len != 88) {
efi_st_error("Wrong device path length %u, expected 88\n",
(unsigned int)len);
return EFI_ST_FAILURE;
}
/* IsDevicePathMultiInstance */
if (!dpu->is_device_path_multi_instance(dp1)) {
efi_st_error("IsDevicePathMultiInstance returned false\n");
return EFI_ST_FAILURE;
}
ret = boottime->free_pool(dp2);
if (ret != EFI_ST_SUCCESS) {
efi_st_error("FreePool failed\n");
return EFI_ST_FAILURE;
}
ret = boottime->free_pool(dp3);
if (ret != EFI_ST_SUCCESS) {
efi_st_error("FreePool failed\n");
return EFI_ST_FAILURE;
}
/* GetNextDevicePathInstance */
dp3 = dp1;
dp2 = dpu->get_next_device_path_instance(&dp1, &len);
if (!dp2) {
efi_st_error("GetNextDevicePathInstance failed\n");
return EFI_ST_FAILURE;
}
if (!dp1) {
efi_st_error("GetNextDevicePathInstance no 2nd instance\n");
return EFI_ST_FAILURE;
}
if (len != 46) {
efi_st_error("Wrong device path length %u, expected 46\n",
(unsigned int)len);
return EFI_ST_FAILURE;
}
len = dpu->get_device_path_size(dp1);
if (len != 42) {
efi_st_error("Wrong device path length %u, expected 42\n",
(unsigned int)len);
return EFI_ST_FAILURE;
}
ret = boottime->free_pool(dp2);
if (ret != EFI_ST_SUCCESS) {
efi_st_error("FreePool failed\n");
return EFI_ST_FAILURE;
}
dp2 = dpu->get_next_device_path_instance(&dp1, &len);
if (!dp2) {
efi_st_error("GetNextDevicePathInstance failed\n");
return EFI_ST_FAILURE;
}
if (len != 42) {
efi_st_error("Wrong device path length %u, expected 46\n",
(unsigned int)len);
return EFI_ST_FAILURE;
}
if (dp1) {
efi_st_error("GetNextDevicePathInstance did not signal end\n");
return EFI_ST_FAILURE;
}
/* Clean up */
ret = boottime->free_pool(dp2);
if (ret != EFI_ST_SUCCESS) {
efi_st_error("FreePool failed\n");
return EFI_ST_FAILURE;
}
ret = boottime->free_pool(dp3);
if (ret != EFI_ST_SUCCESS) {
efi_st_error("FreePool failed\n");
return EFI_ST_FAILURE;
}
return EFI_ST_SUCCESS;
}
EFI_UNIT_TEST(dputil) = {
.name = "device path utilities protocol",
.phase = EFI_EXECUTE_BEFORE_BOOTTIME_EXIT,
.setup = setup,
.execute = execute,
};
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