lib/efi_selftest/efi_selftest_variables.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * efi_selftest_variables
   4  *
   5  * Copyright (c) 2018 Heinrich Schuchardt <xypron.glpk@gmx.de>
   6  *
   7  * This unit test checks the runtime services for variables:
   8  * GetVariable, GetNextVariableName, SetVariable, QueryVariableInfo.
   9  */
  10
  11 #include <efi_selftest.h>
  12
  13 #define EFI_ST_MAX_DATA_SIZE 16
  14 #define EFI_ST_MAX_VARNAME_SIZE 40
  15
  16 static struct efi_boot_services *boottime;
  17 static struct efi_runtime_services *runtime;
  18 static const efi_guid_t guid_vendor0 =
  19         EFI_GUID(0x67029eb5, 0x0af2, 0xf6b1,
  20                  0xda, 0x53, 0xfc, 0xb5, 0x66, 0xdd, 0x1c, 0xe6);
  21 static const efi_guid_t guid_vendor1 =
  22         EFI_GUID(0xff629290, 0x1fc1, 0xd73f,
  23                  0x8f, 0xb1, 0x32, 0xf9, 0x0c, 0xa0, 0x42, 0xea);
  24
  25 /*
  26  * Setup unit test.
  27  *
  28  * @handle      handle of the loaded image
  29  * @systable    system table
  30  */
  31 static int setup(const efi_handle_t img_handle,
  32                  const struct efi_system_table *systable)
  33 {
  34         boottime = systable->boottime;
  35         runtime = systable->runtime;
  36
  37         return EFI_ST_SUCCESS;
  38 }
  39
  40 /*
  41  * Execute unit test.
  42  */
  43 static int execute(void)
  44 {
  45         efi_status_t ret;
  46         efi_uintn_t len;
  47         u32 attr;
  48         u8 v[16] = {0x5d, 0xd1, 0x5e, 0x51, 0x5a, 0x05, 0xc7, 0x0c,
  49                     0x35, 0x4a, 0xae, 0x87, 0xa5, 0xdf, 0x0f, 0x65,};
  50         u8 data[EFI_ST_MAX_DATA_SIZE];
  51         u16 varname[EFI_ST_MAX_VARNAME_SIZE];
  52         int flag;
  53         efi_guid_t guid;
  54         u64 max_storage, rem_storage, max_size;
  55
  56         ret = runtime->query_variable_info(EFI_VARIABLE_BOOTSERVICE_ACCESS,
  57                                            &max_storage, &rem_storage,
  58                                            &max_size);
  59         if (ret != EFI_SUCCESS) {
  60                 efi_st_todo("QueryVariableInfo failed\n");
  61         } else if (!max_storage || !rem_storage || !max_size) {
  62                 efi_st_error("QueryVariableInfo: wrong info\n");
  63                 return EFI_ST_FAILURE;
  64         }
  65         /* Set variable 0 */
  66         ret = runtime->set_variable(L"efi_st_var0", &guid_vendor0,
  67                                     EFI_VARIABLE_BOOTSERVICE_ACCESS,
  68                                     3, v + 4);
  69         if (ret != EFI_SUCCESS) {
  70                 efi_st_error("SetVariable failed\n");
  71                 return EFI_ST_FAILURE;
  72         }
  73         data[3] = 0xff;
  74         len = 3;
  75         ret = runtime->get_variable(L"efi_st_var0", &guid_vendor0,
  76                                     &attr, &len, data);
  77         if (ret != EFI_SUCCESS) {
  78                 efi_st_error("GetVariable failed\n");
  79                 return EFI_ST_FAILURE;
  80         }
  81         if (memcmp(data, v + 4, 3)) {
  82                 efi_st_error("GetVariable returned wrong value\n");
  83                 return EFI_ST_FAILURE;
  84         }
  85         if (data[3] != 0xff) {
  86                 efi_st_error("GetVariable wrote past the end of the buffer\n");
  87                 return EFI_ST_FAILURE;
  88         }
  89         /* Set variable 1 */
  90         ret = runtime->set_variable(L"efi_st_var1", &guid_vendor1,
  91                                     EFI_VARIABLE_BOOTSERVICE_ACCESS,
  92                                     8, v);
  93         if (ret != EFI_SUCCESS) {
  94                 efi_st_error("SetVariable failed\n");
  95                 return EFI_ST_FAILURE;
  96         }
  97         len = EFI_ST_MAX_DATA_SIZE;
  98         ret = runtime->get_variable(L"efi_st_var1", &guid_vendor1,
  99                                     &attr, &len, data);
 100         if (ret != EFI_SUCCESS) {
 101                 efi_st_error("GetVariable failed\n");
 102                 return EFI_ST_FAILURE;
 103         }
 104         if (len != 8) {
 105                 efi_st_error("GetVariable returned wrong length %u\n",
 106                              (unsigned int)len);
 107                 return EFI_ST_FAILURE;
 108         }
 109         if (memcmp(data, v, 8)) {
 110                 efi_st_error("GetVariable returned wrong value\n");
 111                 return EFI_ST_FAILURE;
 112         }
 113         /* Append variable 1 */
 114         ret = runtime->set_variable(L"efi_st_var1", &guid_vendor1,
 115                                     EFI_VARIABLE_BOOTSERVICE_ACCESS |
 116                                     EFI_VARIABLE_APPEND_WRITE,
 117                                     7, v + 8);
 118         if (ret != EFI_SUCCESS) {
 119                 efi_st_error("SetVariable failed\n");
 120                 return EFI_ST_FAILURE;
 121         }
 122         len = EFI_ST_MAX_DATA_SIZE;
 123         ret = runtime->get_variable(L"efi_st_var1", &guid_vendor1,
 124                                     &attr, &len, data);
 125         if (ret != EFI_SUCCESS) {
 126                 efi_st_error("GetVariable failed\n");
 127                 return EFI_ST_FAILURE;
 128         }
 129         if (len != 15)
 130                 efi_st_todo("GetVariable returned wrong length %u\n",
 131                             (unsigned int)len);
 132         if (memcmp(data, v, len))
 133                 efi_st_todo("GetVariable returned wrong value\n");
 134         /* Enumerate variables */
 135         boottime->set_mem(&guid, 16, 0);
 136         *varname = 0;
 137         flag = 0;
 138         for (;;) {
 139                 len = EFI_ST_MAX_VARNAME_SIZE;
 140                 ret = runtime->get_next_variable_name(&len, varname, &guid);
 141                 if (ret == EFI_NOT_FOUND)
 142                         break;
 143                 if (ret != EFI_SUCCESS) {
 144                         efi_st_error("GetNextVariableName failed (%u)\n",
 145                                      (unsigned int)ret);
 146                         return EFI_ST_FAILURE;
 147                 }
 148                 if (!memcmp(&guid, &guid_vendor0, sizeof(efi_guid_t)) &&
 149                     !efi_st_strcmp_16_8(varname, "efi_st_var0"))
 150                         flag |= 1;
 151                 if (!memcmp(&guid, &guid_vendor1, sizeof(efi_guid_t)) &&
 152                     !efi_st_strcmp_16_8(varname, "efi_st_var1"))
 153                         flag |= 2;
 154         }
 155         if (flag != 3) {
 156                 efi_st_error(
 157                         "GetNextVariableName did not return all variables\n");
 158                 return EFI_ST_FAILURE;
 159         }
 160         /* Delete variable 1 */
 161         ret = runtime->set_variable(L"efi_st_var1", &guid_vendor1,
 162                                     0, 0, NULL);
 163         if (ret != EFI_SUCCESS) {
 164                 efi_st_error("SetVariable failed\n");
 165                 return EFI_ST_FAILURE;
 166         }
 167         len = EFI_ST_MAX_DATA_SIZE;
 168         ret = runtime->get_variable(L"efi_st_var1", &guid_vendor1,
 169                                     &attr, &len, data);
 170         if (ret != EFI_NOT_FOUND) {
 171                 efi_st_error("Variable was not deleted\n");
 172                 return EFI_ST_FAILURE;
 173         }
 174         /* Delete variable 0 */
 175         ret = runtime->set_variable(L"efi_st_var0", &guid_vendor0,
 176                                     0, 0, NULL);
 177         if (ret != EFI_SUCCESS) {
 178                 efi_st_error("SetVariable failed\n");
 179                 return EFI_ST_FAILURE;
 180         }
 181         len = EFI_ST_MAX_DATA_SIZE;
 182         ret = runtime->get_variable(L"efi_st_var0", &guid_vendor0,
 183                                     &attr, &len, data);
 184         if (ret != EFI_NOT_FOUND) {
 185                 efi_st_error("Variable was not deleted\n");
 186                 return EFI_ST_FAILURE;
 187         }
 188
 189         return EFI_ST_SUCCESS;
 190 }
 191
 192 EFI_UNIT_TEST(variables) = {
 193         .name = "variables",
 194         .phase = EFI_EXECUTE_BEFORE_BOOTTIME_EXIT,
 195         .setup = setup,
 196         .execute = execute,
 197 };