efi_selftest_variables.c
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// SPDX-License-Identifier: GPL-2.0+
/*
* efi_selftest_variables
*
* Copyright (c) 2018 Heinrich Schuchardt <xypron.glpk@gmx.de>
*
* This unit test checks the runtime services for variables:
* GetVariable, GetNextVariableName, SetVariable, QueryVariableInfo.
*/
#include <efi_selftest.h>
#define EFI_ST_MAX_DATA_SIZE 16
#define EFI_ST_MAX_VARNAME_SIZE 40
static struct efi_boot_services *boottime;
static struct efi_runtime_services *runtime;
static const efi_guid_t guid_vendor0 =
EFI_GUID(0x67029eb5, 0x0af2, 0xf6b1,
0xda, 0x53, 0xfc, 0xb5, 0x66, 0xdd, 0x1c, 0xe6);
static const efi_guid_t guid_vendor1 =
EFI_GUID(0xff629290, 0x1fc1, 0xd73f,
0x8f, 0xb1, 0x32, 0xf9, 0x0c, 0xa0, 0x42, 0xea);
/*
* Setup unit test.
*
* @handle handle of the loaded image
* @systable system table
*/
static int setup(const efi_handle_t img_handle,
const struct efi_system_table *systable)
{
boottime = systable->boottime;
runtime = systable->runtime;
return EFI_ST_SUCCESS;
}
/*
* Execute unit test.
*/
static int execute(void)
{
efi_status_t ret;
efi_uintn_t len;
u32 attr;
u8 v[16] = {0x5d, 0xd1, 0x5e, 0x51, 0x5a, 0x05, 0xc7, 0x0c,
0x35, 0x4a, 0xae, 0x87, 0xa5, 0xdf, 0x0f, 0x65,};
u8 data[EFI_ST_MAX_DATA_SIZE];
u16 varname[EFI_ST_MAX_VARNAME_SIZE];
int flag;
efi_guid_t guid;
u64 max_storage, rem_storage, max_size;
ret = runtime->query_variable_info(EFI_VARIABLE_BOOTSERVICE_ACCESS,
&max_storage, &rem_storage,
&max_size);
if (ret != EFI_SUCCESS) {
efi_st_todo("QueryVariableInfo failed\n");
} else if (!max_storage || !rem_storage || !max_size) {
efi_st_error("QueryVariableInfo: wrong info\n");
return EFI_ST_FAILURE;
}
/* Set variable 0 */
ret = runtime->set_variable(L"efi_st_var0", &guid_vendor0,
EFI_VARIABLE_BOOTSERVICE_ACCESS,
3, v + 4);
if (ret != EFI_SUCCESS) {
efi_st_error("SetVariable failed\n");
return EFI_ST_FAILURE;
}
data[3] = 0xff;
len = 3;
ret = runtime->get_variable(L"efi_st_var0", &guid_vendor0,
&attr, &len, data);
if (ret != EFI_SUCCESS) {
efi_st_error("GetVariable failed\n");
return EFI_ST_FAILURE;
}
if (efi_st_memcmp(data, v + 4, 3)) {
efi_st_error("GetVariable returned wrong value\n");
return EFI_ST_FAILURE;
}
if (data[3] != 0xff) {
efi_st_error("GetVariable wrote past the end of the buffer\n");
return EFI_ST_FAILURE;
}
/* Set variable 1 */
ret = runtime->set_variable(L"efi_st_var1", &guid_vendor1,
EFI_VARIABLE_BOOTSERVICE_ACCESS,
8, v);
if (ret != EFI_SUCCESS) {
efi_st_error("SetVariable failed\n");
return EFI_ST_FAILURE;
}
len = EFI_ST_MAX_DATA_SIZE;
ret = runtime->get_variable(L"efi_st_var1", &guid_vendor1,
&attr, &len, data);
if (ret != EFI_SUCCESS) {
efi_st_error("GetVariable failed\n");
return EFI_ST_FAILURE;
}
if (len != 8) {
efi_st_error("GetVariable returned wrong length %u\n",
(unsigned int)len);
return EFI_ST_FAILURE;
}
if (efi_st_memcmp(data, v, 8)) {
efi_st_error("GetVariable returned wrong value\n");
return EFI_ST_FAILURE;
}
/* Append variable 1 */
ret = runtime->set_variable(L"efi_st_var1", &guid_vendor1,
EFI_VARIABLE_BOOTSERVICE_ACCESS |
EFI_VARIABLE_APPEND_WRITE,
7, v + 8);
if (ret != EFI_SUCCESS) {
efi_st_error("SetVariable failed\n");
return EFI_ST_FAILURE;
}
len = EFI_ST_MAX_DATA_SIZE;
ret = runtime->get_variable(L"efi_st_var1", &guid_vendor1,
&attr, &len, data);
if (ret != EFI_SUCCESS) {
efi_st_error("GetVariable failed\n");
return EFI_ST_FAILURE;
}
if (len != 15)
efi_st_todo("GetVariable returned wrong length %u\n",
(unsigned int)len);
if (efi_st_memcmp(data, v, len))
efi_st_todo("GetVariable returned wrong value\n");
/* Enumerate variables */
boottime->set_mem(&guid, 16, 0);
*varname = 0;
flag = 0;
for (;;) {
len = EFI_ST_MAX_VARNAME_SIZE;
ret = runtime->get_next_variable_name(&len, varname, &guid);
if (ret == EFI_NOT_FOUND)
break;
if (ret != EFI_SUCCESS) {
efi_st_error("GetNextVariableName failed (%u)\n",
(unsigned int)ret);
return EFI_ST_FAILURE;
}
if (!efi_st_memcmp(&guid, &guid_vendor0, sizeof(efi_guid_t)) &&
!efi_st_strcmp_16_8(varname, "efi_st_var0"))
flag |= 1;
if (!efi_st_memcmp(&guid, &guid_vendor1, sizeof(efi_guid_t)) &&
!efi_st_strcmp_16_8(varname, "efi_st_var1"))
flag |= 2;
}
if (flag != 3) {
efi_st_error(
"GetNextVariableName did not return all variables\n");
return EFI_ST_FAILURE;
}
/* Delete variable 1 */
ret = runtime->set_variable(L"efi_st_var1", &guid_vendor1,
0, 0, NULL);
if (ret != EFI_SUCCESS) {
efi_st_error("SetVariable failed\n");
return EFI_ST_FAILURE;
}
len = EFI_ST_MAX_DATA_SIZE;
ret = runtime->get_variable(L"efi_st_var1", &guid_vendor1,
&attr, &len, data);
if (ret != EFI_NOT_FOUND) {
efi_st_error("Variable was not deleted\n");
return EFI_ST_FAILURE;
}
/* Delete variable 0 */
ret = runtime->set_variable(L"efi_st_var0", &guid_vendor0,
0, 0, NULL);
if (ret != EFI_SUCCESS) {
efi_st_error("SetVariable failed\n");
return EFI_ST_FAILURE;
}
len = EFI_ST_MAX_DATA_SIZE;
ret = runtime->get_variable(L"efi_st_var0", &guid_vendor0,
&attr, &len, data);
if (ret != EFI_NOT_FOUND) {
efi_st_error("Variable was not deleted\n");
return EFI_ST_FAILURE;
}
return EFI_ST_SUCCESS;
}
EFI_UNIT_TEST(variables) = {
.name = "variables",
.phase = EFI_EXECUTE_BEFORE_BOOTTIME_EXIT,
.setup = setup,
.execute = execute,
};