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504214c4 | 1 | /** @file\r |
504214c4 | 2 | The internal header file includes the common header files, defines\r |
8a2d4996 | 3 | internal structure and functions used by Variable modules.\r |
504214c4 | 4 | \r |
904e0ca9 | 5 | Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>\r |
9d510e61 | 6 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
8d3a5c82 | 7 | \r |
504214c4 | 8 | **/\r |
8d3a5c82 | 9 | \r |
7c80e839 | 10 | #ifndef _VARIABLE_H_\r |
11 | #define _VARIABLE_H_\r | |
8d3a5c82 | 12 | \r |
39099938 | 13 | #include <PiDxe.h>\r |
8d3a5c82 | 14 | #include <Protocol/VariableWrite.h>\r |
88a5561c | 15 | #include <Protocol/FaultTolerantWrite.h>\r |
8d3a5c82 | 16 | #include <Protocol/FirmwareVolumeBlock.h>\r |
17 | #include <Protocol/Variable.h>\r | |
ff843847 | 18 | #include <Protocol/VariableLock.h>\r |
efb01a10 | 19 | #include <Protocol/VarCheck.h>\r |
8d3a5c82 | 20 | #include <Library/PcdLib.h>\r |
0f7aff72 | 21 | #include <Library/HobLib.h>\r |
8d3a5c82 | 22 | #include <Library/UefiDriverEntryPoint.h>\r |
23 | #include <Library/DxeServicesTableLib.h>\r | |
24 | #include <Library/UefiRuntimeLib.h>\r | |
25 | #include <Library/DebugLib.h>\r | |
26 | #include <Library/BaseMemoryLib.h>\r | |
8d3a5c82 | 27 | #include <Library/UefiBootServicesTableLib.h>\r |
28 | #include <Library/UefiLib.h>\r | |
29 | #include <Library/BaseLib.h>\r | |
4cf894eb | 30 | #include <Library/SynchronizationLib.h>\r |
8d3a5c82 | 31 | #include <Library/MemoryAllocationLib.h>\r |
fa0737a8 | 32 | #include <Library/AuthVariableLib.h>\r |
8021f4c7 | 33 | #include <Library/VarCheckLib.h>\r |
052ad7e1 | 34 | #include <Guid/GlobalVariable.h>\r |
01a5c994 | 35 | #include <Guid/EventGroup.h>\r |
3709c4cd | 36 | #include <Guid/VariableFormat.h>\r |
d6550260 | 37 | #include <Guid/SystemNvDataGuid.h>\r |
3e02ebb2 | 38 | #include <Guid/FaultTolerantWrite.h>\r |
4edb1866 | 39 | #include <Guid/VarErrorFlag.h>\r |
8d3a5c82 | 40 | \r |
00663d04 LE |
41 | #include "PrivilegePolymorphic.h"\r |
42 | \r | |
904e0ca9 SZ |
43 | #define NV_STORAGE_VARIABLE_BASE (EFI_PHYSICAL_ADDRESS) \\r |
44 | (PcdGet64 (PcdFlashNvStorageVariableBase64) != 0 ? \\r | |
45 | PcdGet64 (PcdFlashNvStorageVariableBase64) : \\r | |
46 | PcdGet32 (PcdFlashNvStorageVariableBase))\r | |
47 | \r | |
fa0737a8 SZ |
48 | #define EFI_VARIABLE_ATTRIBUTES_MASK (EFI_VARIABLE_NON_VOLATILE | \\r |
49 | EFI_VARIABLE_BOOTSERVICE_ACCESS | \\r | |
50 | EFI_VARIABLE_RUNTIME_ACCESS | \\r | |
51 | EFI_VARIABLE_HARDWARE_ERROR_RECORD | \\r | |
fa0737a8 SZ |
52 | EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \\r |
53 | EFI_VARIABLE_APPEND_WRITE)\r | |
54 | \r | |
255a3f33 RN |
55 | ///\r |
56 | /// The size of a 3 character ISO639 language code.\r | |
57 | ///\r | |
58 | #define ISO_639_2_ENTRY_SIZE 3\r | |
59 | \r | |
0f7aff72 RN |
60 | typedef enum {\r |
61 | VariableStoreTypeVolatile,\r | |
62 | VariableStoreTypeHob,\r | |
63 | VariableStoreTypeNv,\r | |
64 | VariableStoreTypeMax\r | |
65 | } VARIABLE_STORE_TYPE;\r | |
66 | \r | |
8d3a5c82 | 67 | typedef struct {\r |
68 | VARIABLE_HEADER *CurrPtr;\r | |
23b06935 SZ |
69 | //\r |
70 | // If both ADDED and IN_DELETED_TRANSITION variable are present,\r | |
71 | // InDeletedTransitionPtr will point to the IN_DELETED_TRANSITION one.\r | |
72 | // Otherwise, CurrPtr will point to the ADDED or IN_DELETED_TRANSITION one,\r | |
73 | // and InDeletedTransitionPtr will be NULL at the same time.\r | |
74 | //\r | |
75 | VARIABLE_HEADER *InDeletedTransitionPtr;\r | |
8d3a5c82 | 76 | VARIABLE_HEADER *EndPtr;\r |
77 | VARIABLE_HEADER *StartPtr;\r | |
78 | BOOLEAN Volatile;\r | |
79 | } VARIABLE_POINTER_TRACK;\r | |
80 | \r | |
81 | typedef struct {\r | |
0f7aff72 | 82 | EFI_PHYSICAL_ADDRESS HobVariableBase;\r |
8d3a5c82 | 83 | EFI_PHYSICAL_ADDRESS VolatileVariableBase;\r |
84 | EFI_PHYSICAL_ADDRESS NonVolatileVariableBase;\r | |
85 | EFI_LOCK VariableServicesLock;\r | |
fdb7765f | 86 | UINT32 ReentrantState;\r |
fa0737a8 SZ |
87 | BOOLEAN AuthFormat;\r |
88 | BOOLEAN AuthSupport;\r | |
7cd69959 | 89 | BOOLEAN EmuNvMode;\r |
8d3a5c82 | 90 | } VARIABLE_GLOBAL;\r |
91 | \r | |
92 | typedef struct {\r | |
052ad7e1 | 93 | VARIABLE_GLOBAL VariableGlobal;\r |
8d3a5c82 | 94 | UINTN VolatileLastVariableOffset;\r |
95 | UINTN NonVolatileLastVariableOffset;\r | |
4edb1866 SZ |
96 | UINTN CommonVariableSpace;\r |
97 | UINTN CommonMaxUserVariableSpace;\r | |
98 | UINTN CommonRuntimeVariableSpace;\r | |
2fcdca1d | 99 | UINTN CommonVariableTotalSize;\r |
4edb1866 | 100 | UINTN CommonUserVariableTotalSize;\r |
2fcdca1d | 101 | UINTN HwErrVariableTotalSize;\r |
fa0737a8 SZ |
102 | UINTN MaxVariableSize;\r |
103 | UINTN MaxAuthVariableSize;\r | |
9b4a2032 | 104 | UINTN MaxVolatileVariableSize;\r |
fa0737a8 | 105 | UINTN ScratchBufferSize;\r |
255a3f33 RN |
106 | CHAR8 *PlatformLangCodes;\r |
107 | CHAR8 *LangCodes;\r | |
108 | CHAR8 *PlatformLang;\r | |
109 | CHAR8 Lang[ISO_639_2_ENTRY_SIZE + 1];\r | |
8a9e0b72 | 110 | EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *FvbInstance;\r |
052ad7e1 A |
111 | } VARIABLE_MODULE_GLOBAL;\r |
112 | \r | |
335e2681 SZ |
113 | /**\r |
114 | Flush the HOB variable to flash.\r | |
115 | \r | |
116 | @param[in] VariableName Name of variable has been updated or deleted.\r | |
117 | @param[in] VendorGuid Guid of variable has been updated or deleted.\r | |
118 | \r | |
119 | **/\r | |
120 | VOID\r | |
121 | FlushHobVariableToFlash (\r | |
122 | IN CHAR16 *VariableName,\r | |
123 | IN EFI_GUID *VendorGuid\r | |
124 | );\r | |
125 | \r | |
c24b392c | 126 | /**\r |
127 | Writes a buffer to variable storage space, in the working block.\r | |
128 | \r | |
8a2d4996 | 129 | This function writes a buffer to variable storage space into a firmware\r |
130 | volume block device. The destination is specified by the parameter\r | |
c24b392c | 131 | VariableBase. Fault Tolerant Write protocol is used for writing.\r |
132 | \r | |
8a2d4996 | 133 | @param VariableBase Base address of the variable to write.\r |
128ef095 | 134 | @param VariableBuffer Point to the variable data buffer.\r |
c24b392c | 135 | \r |
8a2d4996 | 136 | @retval EFI_SUCCESS The function completed successfully.\r |
137 | @retval EFI_NOT_FOUND Fail to locate Fault Tolerant Write protocol.\r | |
138 | @retval EFI_ABORTED The function could not complete successfully.\r | |
c24b392c | 139 | \r |
140 | **/\r | |
141 | EFI_STATUS\r | |
142 | FtwVariableSpace (\r | |
143 | IN EFI_PHYSICAL_ADDRESS VariableBase,\r | |
128ef095 | 144 | IN VARIABLE_STORE_HEADER *VariableBuffer\r |
c24b392c | 145 | );\r |
146 | \r | |
fa0737a8 SZ |
147 | /**\r |
148 | Finds variable in storage blocks of volatile and non-volatile storage areas.\r | |
149 | \r | |
150 | This code finds variable in storage blocks of volatile and non-volatile storage areas.\r | |
151 | If VariableName is an empty string, then we just return the first\r | |
152 | qualified variable without comparing VariableName and VendorGuid.\r | |
153 | If IgnoreRtCheck is TRUE, then we ignore the EFI_VARIABLE_RUNTIME_ACCESS attribute check\r | |
154 | at runtime when searching existing variable, only VariableName and VendorGuid are compared.\r | |
155 | Otherwise, variables without EFI_VARIABLE_RUNTIME_ACCESS are not visible at runtime.\r | |
156 | \r | |
157 | @param[in] VariableName Name of the variable to be found.\r | |
158 | @param[in] VendorGuid Vendor GUID to be found.\r | |
159 | @param[out] PtrTrack VARIABLE_POINTER_TRACK structure for output,\r | |
160 | including the range searched and the target position.\r | |
161 | @param[in] Global Pointer to VARIABLE_GLOBAL structure, including\r | |
162 | base of volatile variable storage area, base of\r | |
163 | NV variable storage area, and a lock.\r | |
164 | @param[in] IgnoreRtCheck Ignore EFI_VARIABLE_RUNTIME_ACCESS attribute\r | |
165 | check at runtime when searching variable.\r | |
166 | \r | |
167 | @retval EFI_INVALID_PARAMETER If VariableName is not an empty string, while\r | |
168 | VendorGuid is NULL.\r | |
169 | @retval EFI_SUCCESS Variable successfully found.\r | |
170 | @retval EFI_NOT_FOUND Variable not found\r | |
171 | \r | |
172 | **/\r | |
173 | EFI_STATUS\r | |
174 | FindVariable (\r | |
175 | IN CHAR16 *VariableName,\r | |
176 | IN EFI_GUID *VendorGuid,\r | |
177 | OUT VARIABLE_POINTER_TRACK *PtrTrack,\r | |
178 | IN VARIABLE_GLOBAL *Global,\r | |
179 | IN BOOLEAN IgnoreRtCheck\r | |
180 | );\r | |
c24b392c | 181 | \r |
fa0737a8 SZ |
182 | /**\r |
183 | This function is to check if the remaining variable space is enough to set\r | |
184 | all Variables from argument list successfully. The purpose of the check\r | |
185 | is to keep the consistency of the Variables to be in variable storage.\r | |
8a2d4996 | 186 | \r |
fa0737a8 SZ |
187 | Note: Variables are assumed to be in same storage.\r |
188 | The set sequence of Variables will be same with the sequence of VariableEntry from argument list,\r | |
189 | so follow the argument sequence to check the Variables.\r | |
190 | \r | |
191 | @param[in] Attributes Variable attributes for Variable entries.\r | |
192 | @param[in] Marker VA_LIST style variable argument list.\r | |
193 | The variable argument list with type VARIABLE_ENTRY_CONSISTENCY *.\r | |
194 | A NULL terminates the list. The VariableSize of\r | |
195 | VARIABLE_ENTRY_CONSISTENCY is the variable data size as input.\r | |
196 | It will be changed to variable total size as output.\r | |
197 | \r | |
198 | @retval TRUE Have enough variable space to set the Variables successfully.\r | |
199 | @retval FALSE No enough variable space to set the Variables successfully.\r | |
200 | \r | |
201 | **/\r | |
202 | BOOLEAN\r | |
203 | EFIAPI\r | |
204 | CheckRemainingSpaceForConsistencyInternal (\r | |
205 | IN UINT32 Attributes,\r | |
206 | IN VA_LIST Marker\r | |
207 | );\r | |
208 | \r | |
209 | /**\r | |
210 | Update the variable region with Variable information. If EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS is set,\r | |
211 | index of associated public key is needed.\r | |
8a2d4996 | 212 | \r |
fa0737a8 SZ |
213 | @param[in] VariableName Name of variable.\r |
214 | @param[in] VendorGuid Guid of variable.\r | |
215 | @param[in] Data Variable data.\r | |
216 | @param[in] DataSize Size of data. 0 means delete.\r | |
217 | @param[in] Attributes Attributes of the variable.\r | |
218 | @param[in] KeyIndex Index of associated public key.\r | |
219 | @param[in] MonotonicCount Value of associated monotonic count.\r | |
23b06935 | 220 | @param[in, out] Variable The variable information that is used to keep track of variable usage.\r |
8a2d4996 | 221 | \r |
fa0737a8 | 222 | @param[in] TimeStamp Value of associated TimeStamp.\r |
8a2d4996 | 223 | \r |
fa0737a8 | 224 | @retval EFI_SUCCESS The update operation is success.\r |
8a2d4996 | 225 | @retval EFI_OUT_OF_RESOURCES Variable region is full, cannot write other data into this region.\r |
226 | \r | |
227 | **/\r | |
228 | EFI_STATUS\r | |
229 | UpdateVariable (\r | |
230 | IN CHAR16 *VariableName,\r | |
231 | IN EFI_GUID *VendorGuid,\r | |
232 | IN VOID *Data,\r | |
233 | IN UINTN DataSize,\r | |
234 | IN UINT32 Attributes OPTIONAL,\r | |
fa0737a8 SZ |
235 | IN UINT32 KeyIndex OPTIONAL,\r |
236 | IN UINT64 MonotonicCount OPTIONAL,\r | |
237 | IN OUT VARIABLE_POINTER_TRACK *Variable,\r | |
238 | IN EFI_TIME *TimeStamp OPTIONAL\r | |
8a2d4996 | 239 | );\r |
240 | \r | |
241 | \r | |
242 | /**\r | |
243 | Return TRUE if ExitBootServices () has been called.\r | |
fa0737a8 | 244 | \r |
8a2d4996 | 245 | @retval TRUE If ExitBootServices () has been called.\r |
246 | **/\r | |
247 | BOOLEAN\r | |
248 | AtRuntime (\r | |
249 | VOID\r | |
250 | );\r | |
251 | \r | |
252 | /**\r | |
253 | Initializes a basic mutual exclusion lock.\r | |
254 | \r | |
fa0737a8 SZ |
255 | This function initializes a basic mutual exclusion lock to the released state\r |
256 | and returns the lock. Each lock provides mutual exclusion access at its task\r | |
8a2d4996 | 257 | priority level. Since there is no preemption or multiprocessor support in EFI,\r |
258 | acquiring the lock only consists of raising to the locks TPL.\r | |
259 | If Lock is NULL, then ASSERT().\r | |
260 | If Priority is not a valid TPL value, then ASSERT().\r | |
261 | \r | |
262 | @param Lock A pointer to the lock data structure to initialize.\r | |
263 | @param Priority EFI TPL is associated with the lock.\r | |
264 | \r | |
265 | @return The lock.\r | |
266 | \r | |
267 | **/\r | |
268 | EFI_LOCK *\r | |
269 | InitializeLock (\r | |
270 | IN OUT EFI_LOCK *Lock,\r | |
271 | IN EFI_TPL Priority\r | |
272 | );\r | |
273 | \r | |
fa0737a8 | 274 | \r |
8a2d4996 | 275 | /**\r |
276 | Acquires lock only at boot time. Simply returns at runtime.\r | |
277 | \r | |
278 | This is a temperary function that will be removed when\r | |
279 | EfiAcquireLock() in UefiLib can handle the call in UEFI\r | |
280 | Runtimer driver in RT phase.\r | |
281 | It calls EfiAcquireLock() at boot time, and simply returns\r | |
282 | at runtime.\r | |
283 | \r | |
284 | @param Lock A pointer to the lock to acquire.\r | |
285 | \r | |
286 | **/\r | |
287 | VOID\r | |
288 | AcquireLockOnlyAtBootTime (\r | |
289 | IN EFI_LOCK *Lock\r | |
290 | );\r | |
291 | \r | |
292 | \r | |
293 | /**\r | |
294 | Releases lock only at boot time. Simply returns at runtime.\r | |
295 | \r | |
296 | This is a temperary function which will be removed when\r | |
297 | EfiReleaseLock() in UefiLib can handle the call in UEFI\r | |
298 | Runtimer driver in RT phase.\r | |
299 | It calls EfiReleaseLock() at boot time and simply returns\r | |
300 | at runtime.\r | |
301 | \r | |
302 | @param Lock A pointer to the lock to release.\r | |
303 | \r | |
304 | **/\r | |
305 | VOID\r | |
306 | ReleaseLockOnlyAtBootTime (\r | |
307 | IN EFI_LOCK *Lock\r | |
fa0737a8 | 308 | );\r |
8a2d4996 | 309 | \r |
310 | /**\r | |
0a18956d | 311 | Retrieve the FVB protocol interface by HANDLE.\r |
8a2d4996 | 312 | \r |
313 | @param[in] FvBlockHandle The handle of FVB protocol that provides services for\r | |
314 | reading, writing, and erasing the target block.\r | |
315 | @param[out] FvBlock The interface of FVB protocol\r | |
316 | \r | |
317 | @retval EFI_SUCCESS The interface information for the specified protocol was returned.\r | |
318 | @retval EFI_UNSUPPORTED The device does not support the FVB protocol.\r | |
319 | @retval EFI_INVALID_PARAMETER FvBlockHandle is not a valid EFI_HANDLE or FvBlock is NULL.\r | |
fa0737a8 | 320 | \r |
8a2d4996 | 321 | **/\r |
322 | EFI_STATUS\r | |
323 | GetFvbByHandle (\r | |
324 | IN EFI_HANDLE FvBlockHandle,\r | |
325 | OUT EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL **FvBlock\r | |
326 | );\r | |
327 | \r | |
8a2d4996 | 328 | /**\r |
329 | Function returns an array of handles that support the FVB protocol\r | |
fa0737a8 | 330 | in a buffer allocated from pool.\r |
8a2d4996 | 331 | \r |
332 | @param[out] NumberHandles The number of handles returned in Buffer.\r | |
333 | @param[out] Buffer A pointer to the buffer to return the requested\r | |
334 | array of handles that support FVB protocol.\r | |
335 | \r | |
336 | @retval EFI_SUCCESS The array of handles was returned in Buffer, and the number of\r | |
337 | handles in Buffer was returned in NumberHandles.\r | |
338 | @retval EFI_NOT_FOUND No FVB handle was found.\r | |
339 | @retval EFI_OUT_OF_RESOURCES There is not enough pool memory to store the matching results.\r | |
340 | @retval EFI_INVALID_PARAMETER NumberHandles is NULL or Buffer is NULL.\r | |
fa0737a8 | 341 | \r |
8a2d4996 | 342 | **/\r |
343 | EFI_STATUS\r | |
344 | GetFvbCountAndBuffer (\r | |
345 | OUT UINTN *NumberHandles,\r | |
346 | OUT EFI_HANDLE **Buffer\r | |
347 | );\r | |
348 | \r | |
349 | /**\r | |
350 | Initializes variable store area for non-volatile and volatile variable.\r | |
351 | \r | |
352 | @retval EFI_SUCCESS Function successfully executed.\r | |
353 | @retval EFI_OUT_OF_RESOURCES Fail to allocate enough memory resource.\r | |
354 | \r | |
355 | **/\r | |
356 | EFI_STATUS\r | |
357 | VariableCommonInitialize (\r | |
358 | VOID\r | |
359 | );\r | |
360 | \r | |
361 | /**\r | |
362 | This function reclaims variable storage if free size is below the threshold.\r | |
fa0737a8 | 363 | \r |
8a2d4996 | 364 | **/\r |
365 | VOID\r | |
366 | ReclaimForOS(\r | |
367 | VOID\r | |
fa0737a8 SZ |
368 | );\r |
369 | \r | |
9b4a2032 LE |
370 | /**\r |
371 | Get maximum variable size, covering both non-volatile and volatile variables.\r | |
372 | \r | |
373 | @return Maximum variable size.\r | |
374 | \r | |
375 | **/\r | |
376 | UINTN\r | |
377 | GetMaxVariableSize (\r | |
378 | VOID\r | |
379 | );\r | |
380 | \r | |
8a2d4996 | 381 | /**\r |
904e0ca9 | 382 | Initializes variable write service.\r |
8a2d4996 | 383 | \r |
384 | @retval EFI_SUCCESS Function successfully executed.\r | |
385 | @retval Others Fail to initialize the variable service.\r | |
386 | \r | |
387 | **/\r | |
388 | EFI_STATUS\r | |
389 | VariableWriteServiceInitialize (\r | |
390 | VOID\r | |
391 | );\r | |
fa0737a8 | 392 | \r |
8a2d4996 | 393 | /**\r |
0a18956d | 394 | Retrieve the SMM Fault Tolerent Write protocol interface.\r |
8a2d4996 | 395 | \r |
396 | @param[out] FtwProtocol The interface of SMM Ftw protocol\r | |
397 | \r | |
398 | @retval EFI_SUCCESS The SMM SAR protocol instance was found and returned in SarProtocol.\r | |
399 | @retval EFI_NOT_FOUND The SMM SAR protocol instance was not found.\r | |
400 | @retval EFI_INVALID_PARAMETER SarProtocol is NULL.\r | |
401 | \r | |
402 | **/\r | |
403 | EFI_STATUS\r | |
404 | GetFtwProtocol (\r | |
405 | OUT VOID **FtwProtocol\r | |
406 | );\r | |
407 | \r | |
408 | /**\r | |
409 | Get the proper fvb handle and/or fvb protocol by the given Flash address.\r | |
410 | \r | |
411 | @param[in] Address The Flash address.\r | |
412 | @param[out] FvbHandle In output, if it is not NULL, it points to the proper FVB handle.\r | |
413 | @param[out] FvbProtocol In output, if it is not NULL, it points to the proper FVB protocol.\r | |
414 | \r | |
415 | **/\r | |
416 | EFI_STATUS\r | |
417 | GetFvbInfoByAddress (\r | |
418 | IN EFI_PHYSICAL_ADDRESS Address,\r | |
419 | OUT EFI_HANDLE *FvbHandle OPTIONAL,\r | |
420 | OUT EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL **FvbProtocol OPTIONAL\r | |
421 | );\r | |
422 | \r | |
423 | /**\r | |
424 | \r | |
425 | This code finds variable in storage blocks (Volatile or Non-Volatile).\r | |
426 | \r | |
fa0737a8 SZ |
427 | Caution: This function may receive untrusted input.\r |
428 | This function may be invoked in SMM mode, and datasize and data are external input.\r | |
429 | This function will do basic validation, before parse the data.\r | |
430 | \r | |
8a2d4996 | 431 | @param VariableName Name of Variable to be found.\r |
432 | @param VendorGuid Variable vendor GUID.\r | |
433 | @param Attributes Attribute value of the variable found.\r | |
434 | @param DataSize Size of Data found. If size is less than the\r | |
435 | data, this value contains the required size.\r | |
746645bd SZ |
436 | @param Data The buffer to return the contents of the variable. May be NULL\r |
437 | with a zero DataSize in order to determine the size buffer needed.\r | |
fa0737a8 | 438 | \r |
8a2d4996 | 439 | @return EFI_INVALID_PARAMETER Invalid parameter.\r |
440 | @return EFI_SUCCESS Find the specified variable.\r | |
441 | @return EFI_NOT_FOUND Not found.\r | |
442 | @return EFI_BUFFER_TO_SMALL DataSize is too small for the result.\r | |
443 | \r | |
444 | **/\r | |
445 | EFI_STATUS\r | |
446 | EFIAPI\r | |
447 | VariableServiceGetVariable (\r | |
448 | IN CHAR16 *VariableName,\r | |
449 | IN EFI_GUID *VendorGuid,\r | |
450 | OUT UINT32 *Attributes OPTIONAL,\r | |
451 | IN OUT UINTN *DataSize,\r | |
746645bd | 452 | OUT VOID *Data OPTIONAL\r |
8a2d4996 | 453 | );\r |
454 | \r | |
455 | /**\r | |
456 | \r | |
457 | This code Finds the Next available variable.\r | |
458 | \r | |
efb01a10 SZ |
459 | Caution: This function may receive untrusted input.\r |
460 | This function may be invoked in SMM mode. This function will do basic validation, before parse the data.\r | |
461 | \r | |
6f817f9b SZ |
462 | @param VariableNameSize The size of the VariableName buffer. The size must be large\r |
463 | enough to fit input string supplied in VariableName buffer.\r | |
8a2d4996 | 464 | @param VariableName Pointer to variable name.\r |
465 | @param VendorGuid Variable Vendor Guid.\r | |
466 | \r | |
6f817f9b SZ |
467 | @retval EFI_SUCCESS The function completed successfully.\r |
468 | @retval EFI_NOT_FOUND The next variable was not found.\r | |
469 | @retval EFI_BUFFER_TOO_SMALL The VariableNameSize is too small for the result.\r | |
470 | VariableNameSize has been updated with the size needed to complete the request.\r | |
471 | @retval EFI_INVALID_PARAMETER VariableNameSize is NULL.\r | |
472 | @retval EFI_INVALID_PARAMETER VariableName is NULL.\r | |
473 | @retval EFI_INVALID_PARAMETER VendorGuid is NULL.\r | |
474 | @retval EFI_INVALID_PARAMETER The input values of VariableName and VendorGuid are not a name and\r | |
475 | GUID of an existing variable.\r | |
476 | @retval EFI_INVALID_PARAMETER Null-terminator is not found in the first VariableNameSize bytes of\r | |
477 | the input VariableName buffer.\r | |
8a2d4996 | 478 | \r |
479 | **/\r | |
480 | EFI_STATUS\r | |
481 | EFIAPI\r | |
482 | VariableServiceGetNextVariableName (\r | |
483 | IN OUT UINTN *VariableNameSize,\r | |
484 | IN OUT CHAR16 *VariableName,\r | |
485 | IN OUT EFI_GUID *VendorGuid\r | |
486 | );\r | |
487 | \r | |
488 | /**\r | |
489 | \r | |
490 | This code sets variable in storage blocks (Volatile or Non-Volatile).\r | |
491 | \r | |
efb01a10 SZ |
492 | Caution: This function may receive untrusted input.\r |
493 | This function may be invoked in SMM mode, and datasize and data are external input.\r | |
494 | This function will do basic validation, before parse the data.\r | |
fa0737a8 SZ |
495 | This function will parse the authentication carefully to avoid security issues, like\r |
496 | buffer overflow, integer overflow.\r | |
497 | This function will check attribute carefully to avoid authentication bypass.\r | |
efb01a10 | 498 | \r |
8a2d4996 | 499 | @param VariableName Name of Variable to be found.\r |
500 | @param VendorGuid Variable vendor GUID.\r | |
501 | @param Attributes Attribute value of the variable found\r | |
502 | @param DataSize Size of Data found. If size is less than the\r | |
503 | data, this value contains the required size.\r | |
504 | @param Data Data pointer.\r | |
505 | \r | |
506 | @return EFI_INVALID_PARAMETER Invalid parameter.\r | |
507 | @return EFI_SUCCESS Set successfully.\r | |
508 | @return EFI_OUT_OF_RESOURCES Resource not enough to set variable.\r | |
509 | @return EFI_NOT_FOUND Not found.\r | |
510 | @return EFI_WRITE_PROTECTED Variable is read-only.\r | |
511 | \r | |
512 | **/\r | |
513 | EFI_STATUS\r | |
514 | EFIAPI\r | |
515 | VariableServiceSetVariable (\r | |
516 | IN CHAR16 *VariableName,\r | |
517 | IN EFI_GUID *VendorGuid,\r | |
518 | IN UINT32 Attributes,\r | |
519 | IN UINTN DataSize,\r | |
520 | IN VOID *Data\r | |
521 | );\r | |
522 | \r | |
b2bd493e SZ |
523 | /**\r |
524 | \r | |
525 | This code returns information about the EFI variables.\r | |
526 | \r | |
efb01a10 SZ |
527 | Caution: This function may receive untrusted input.\r |
528 | This function may be invoked in SMM mode. This function will do basic validation, before parse the data.\r | |
529 | \r | |
b2bd493e SZ |
530 | @param Attributes Attributes bitmask to specify the type of variables\r |
531 | on which to return information.\r | |
532 | @param MaximumVariableStorageSize Pointer to the maximum size of the storage space available\r | |
533 | for the EFI variables associated with the attributes specified.\r | |
534 | @param RemainingVariableStorageSize Pointer to the remaining size of the storage space available\r | |
535 | for EFI variables associated with the attributes specified.\r | |
536 | @param MaximumVariableSize Pointer to the maximum size of an individual EFI variables\r | |
537 | associated with the attributes specified.\r | |
538 | \r | |
539 | @return EFI_SUCCESS Query successfully.\r | |
540 | \r | |
541 | **/\r | |
542 | EFI_STATUS\r | |
543 | EFIAPI\r | |
544 | VariableServiceQueryVariableInfoInternal (\r | |
545 | IN UINT32 Attributes,\r | |
546 | OUT UINT64 *MaximumVariableStorageSize,\r | |
547 | OUT UINT64 *RemainingVariableStorageSize,\r | |
548 | OUT UINT64 *MaximumVariableSize\r | |
549 | );\r | |
550 | \r | |
8a2d4996 | 551 | /**\r |
552 | \r | |
553 | This code returns information about the EFI variables.\r | |
554 | \r | |
efb01a10 SZ |
555 | Caution: This function may receive untrusted input.\r |
556 | This function may be invoked in SMM mode. This function will do basic validation, before parse the data.\r | |
557 | \r | |
8a2d4996 | 558 | @param Attributes Attributes bitmask to specify the type of variables\r |
559 | on which to return information.\r | |
560 | @param MaximumVariableStorageSize Pointer to the maximum size of the storage space available\r | |
561 | for the EFI variables associated with the attributes specified.\r | |
562 | @param RemainingVariableStorageSize Pointer to the remaining size of the storage space available\r | |
563 | for EFI variables associated with the attributes specified.\r | |
564 | @param MaximumVariableSize Pointer to the maximum size of an individual EFI variables\r | |
565 | associated with the attributes specified.\r | |
566 | \r | |
567 | @return EFI_INVALID_PARAMETER An invalid combination of attribute bits was supplied.\r | |
568 | @return EFI_SUCCESS Query successfully.\r | |
569 | @return EFI_UNSUPPORTED The attribute is not supported on this platform.\r | |
570 | \r | |
571 | **/\r | |
572 | EFI_STATUS\r | |
573 | EFIAPI\r | |
574 | VariableServiceQueryVariableInfo (\r | |
575 | IN UINT32 Attributes,\r | |
576 | OUT UINT64 *MaximumVariableStorageSize,\r | |
577 | OUT UINT64 *RemainingVariableStorageSize,\r | |
578 | OUT UINT64 *MaximumVariableSize\r | |
fa0737a8 | 579 | );\r |
ff843847 RN |
580 | \r |
581 | /**\r | |
582 | Mark a variable that will become read-only after leaving the DXE phase of execution.\r | |
583 | \r | |
584 | @param[in] This The VARIABLE_LOCK_PROTOCOL instance.\r | |
585 | @param[in] VariableName A pointer to the variable name that will be made read-only subsequently.\r | |
586 | @param[in] VendorGuid A pointer to the vendor GUID that will be made read-only subsequently.\r | |
587 | \r | |
588 | @retval EFI_SUCCESS The variable specified by the VariableName and the VendorGuid was marked\r | |
589 | as pending to be read-only.\r | |
590 | @retval EFI_INVALID_PARAMETER VariableName or VendorGuid is NULL.\r | |
591 | Or VariableName is an empty string.\r | |
592 | @retval EFI_ACCESS_DENIED EFI_END_OF_DXE_EVENT_GROUP_GUID or EFI_EVENT_GROUP_READY_TO_BOOT has\r | |
593 | already been signaled.\r | |
594 | @retval EFI_OUT_OF_RESOURCES There is not enough resource to hold the lock request.\r | |
595 | **/\r | |
596 | EFI_STATUS\r | |
597 | EFIAPI\r | |
598 | VariableLockRequestToLock (\r | |
599 | IN CONST EDKII_VARIABLE_LOCK_PROTOCOL *This,\r | |
600 | IN CHAR16 *VariableName,\r | |
601 | IN EFI_GUID *VendorGuid\r | |
602 | );\r | |
603 | \r | |
efb01a10 SZ |
604 | /**\r |
605 | Register SetVariable check handler.\r | |
606 | \r | |
607 | @param[in] Handler Pointer to check handler.\r | |
608 | \r | |
609 | @retval EFI_SUCCESS The SetVariable check handler was registered successfully.\r | |
610 | @retval EFI_INVALID_PARAMETER Handler is NULL.\r | |
611 | @retval EFI_ACCESS_DENIED EFI_END_OF_DXE_EVENT_GROUP_GUID or EFI_EVENT_GROUP_READY_TO_BOOT has\r | |
612 | already been signaled.\r | |
613 | @retval EFI_OUT_OF_RESOURCES There is not enough resource for the SetVariable check handler register request.\r | |
614 | @retval EFI_UNSUPPORTED This interface is not implemented.\r | |
615 | For example, it is unsupported in VarCheck protocol if both VarCheck and SmmVarCheck protocols are present.\r | |
616 | \r | |
617 | **/\r | |
618 | EFI_STATUS\r | |
619 | EFIAPI\r | |
620 | VarCheckRegisterSetVariableCheckHandler (\r | |
621 | IN VAR_CHECK_SET_VARIABLE_CHECK_HANDLER Handler\r | |
622 | );\r | |
623 | \r | |
4edb1866 | 624 | /**\r |
fa0737a8 | 625 | Variable property set.\r |
4edb1866 | 626 | \r |
fa0737a8 SZ |
627 | @param[in] Name Pointer to the variable name.\r |
628 | @param[in] Guid Pointer to the vendor GUID.\r | |
629 | @param[in] VariableProperty Pointer to the input variable property.\r | |
4edb1866 | 630 | \r |
fa0737a8 SZ |
631 | @retval EFI_SUCCESS The property of variable specified by the Name and Guid was set successfully.\r |
632 | @retval EFI_INVALID_PARAMETER Name, Guid or VariableProperty is NULL, or Name is an empty string,\r | |
633 | or the fields of VariableProperty are not valid.\r | |
634 | @retval EFI_ACCESS_DENIED EFI_END_OF_DXE_EVENT_GROUP_GUID or EFI_EVENT_GROUP_READY_TO_BOOT has\r | |
635 | already been signaled.\r | |
636 | @retval EFI_OUT_OF_RESOURCES There is not enough resource for the variable property set request.\r | |
4edb1866 SZ |
637 | \r |
638 | **/\r | |
639 | EFI_STATUS\r | |
640 | EFIAPI\r | |
fa0737a8 | 641 | VarCheckVariablePropertySet (\r |
4edb1866 SZ |
642 | IN CHAR16 *Name,\r |
643 | IN EFI_GUID *Guid,\r | |
fa0737a8 | 644 | IN VAR_CHECK_VARIABLE_PROPERTY *VariableProperty\r |
4edb1866 SZ |
645 | );\r |
646 | \r | |
efb01a10 SZ |
647 | /**\r |
648 | Variable property get.\r | |
649 | \r | |
650 | @param[in] Name Pointer to the variable name.\r | |
651 | @param[in] Guid Pointer to the vendor GUID.\r | |
652 | @param[out] VariableProperty Pointer to the output variable property.\r | |
653 | \r | |
654 | @retval EFI_SUCCESS The property of variable specified by the Name and Guid was got successfully.\r | |
655 | @retval EFI_INVALID_PARAMETER Name, Guid or VariableProperty is NULL, or Name is an empty string.\r | |
656 | @retval EFI_NOT_FOUND The property of variable specified by the Name and Guid was not found.\r | |
657 | \r | |
658 | **/\r | |
659 | EFI_STATUS\r | |
660 | EFIAPI\r | |
661 | VarCheckVariablePropertyGet (\r | |
662 | IN CHAR16 *Name,\r | |
663 | IN EFI_GUID *Guid,\r | |
664 | OUT VAR_CHECK_VARIABLE_PROPERTY *VariableProperty\r | |
665 | );\r | |
666 | \r | |
4edb1866 SZ |
667 | /**\r |
668 | Initialize variable quota.\r | |
669 | \r | |
670 | **/\r | |
671 | VOID\r | |
672 | InitializeVariableQuota (\r | |
673 | VOID\r | |
674 | );\r | |
675 | \r | |
5f0871e3 SZ |
676 | extern VARIABLE_MODULE_GLOBAL *mVariableModuleGlobal;\r |
677 | extern EFI_FIRMWARE_VOLUME_HEADER *mNvFvHeaderCache;\r | |
678 | extern VARIABLE_STORE_HEADER *mNvVariableCache;\r | |
679 | extern VARIABLE_INFO_ENTRY *gVariableInfo;\r | |
680 | extern BOOLEAN mEndOfDxe;\r | |
681 | extern VAR_CHECK_REQUEST_SOURCE mRequestSource;\r | |
682 | \r | |
683 | extern AUTH_VAR_LIB_CONTEXT_OUT mAuthContextOut;\r | |
fa0737a8 SZ |
684 | \r |
685 | /**\r | |
686 | Finds variable in storage blocks of volatile and non-volatile storage areas.\r | |
687 | \r | |
688 | This code finds variable in storage blocks of volatile and non-volatile storage areas.\r | |
689 | If VariableName is an empty string, then we just return the first\r | |
690 | qualified variable without comparing VariableName and VendorGuid.\r | |
691 | \r | |
692 | @param[in] VariableName Name of the variable to be found.\r | |
693 | @param[in] VendorGuid Variable vendor GUID to be found.\r | |
694 | @param[out] AuthVariableInfo Pointer to AUTH_VARIABLE_INFO structure for\r | |
695 | output of the variable found.\r | |
696 | \r | |
697 | @retval EFI_INVALID_PARAMETER If VariableName is not an empty string,\r | |
698 | while VendorGuid is NULL.\r | |
699 | @retval EFI_SUCCESS Variable successfully found.\r | |
700 | @retval EFI_NOT_FOUND Variable not found\r | |
701 | \r | |
702 | **/\r | |
703 | EFI_STATUS\r | |
704 | EFIAPI\r | |
705 | VariableExLibFindVariable (\r | |
706 | IN CHAR16 *VariableName,\r | |
707 | IN EFI_GUID *VendorGuid,\r | |
708 | OUT AUTH_VARIABLE_INFO *AuthVariableInfo\r | |
709 | );\r | |
710 | \r | |
711 | /**\r | |
712 | Finds next variable in storage blocks of volatile and non-volatile storage areas.\r | |
713 | \r | |
714 | This code finds next variable in storage blocks of volatile and non-volatile storage areas.\r | |
715 | If VariableName is an empty string, then we just return the first\r | |
716 | qualified variable without comparing VariableName and VendorGuid.\r | |
717 | \r | |
718 | @param[in] VariableName Name of the variable to be found.\r | |
719 | @param[in] VendorGuid Variable vendor GUID to be found.\r | |
720 | @param[out] AuthVariableInfo Pointer to AUTH_VARIABLE_INFO structure for\r | |
721 | output of the next variable.\r | |
722 | \r | |
723 | @retval EFI_INVALID_PARAMETER If VariableName is not an empty string,\r | |
724 | while VendorGuid is NULL.\r | |
725 | @retval EFI_SUCCESS Variable successfully found.\r | |
726 | @retval EFI_NOT_FOUND Variable not found\r | |
727 | \r | |
728 | **/\r | |
729 | EFI_STATUS\r | |
730 | EFIAPI\r | |
731 | VariableExLibFindNextVariable (\r | |
732 | IN CHAR16 *VariableName,\r | |
733 | IN EFI_GUID *VendorGuid,\r | |
734 | OUT AUTH_VARIABLE_INFO *AuthVariableInfo\r | |
735 | );\r | |
736 | \r | |
737 | /**\r | |
738 | Update the variable region with Variable information.\r | |
739 | \r | |
740 | @param[in] AuthVariableInfo Pointer AUTH_VARIABLE_INFO structure for\r | |
741 | input of the variable.\r | |
742 | \r | |
743 | @retval EFI_SUCCESS The update operation is success.\r | |
744 | @retval EFI_INVALID_PARAMETER Invalid parameter.\r | |
745 | @retval EFI_WRITE_PROTECTED Variable is write-protected.\r | |
746 | @retval EFI_OUT_OF_RESOURCES There is not enough resource.\r | |
747 | \r | |
748 | **/\r | |
749 | EFI_STATUS\r | |
750 | EFIAPI\r | |
751 | VariableExLibUpdateVariable (\r | |
752 | IN AUTH_VARIABLE_INFO *AuthVariableInfo\r | |
753 | );\r | |
754 | \r | |
755 | /**\r | |
756 | Get scratch buffer.\r | |
757 | \r | |
758 | @param[in, out] ScratchBufferSize Scratch buffer size. If input size is greater than\r | |
759 | the maximum supported buffer size, this value contains\r | |
760 | the maximum supported buffer size as output.\r | |
761 | @param[out] ScratchBuffer Pointer to scratch buffer address.\r | |
762 | \r | |
763 | @retval EFI_SUCCESS Get scratch buffer successfully.\r | |
764 | @retval EFI_UNSUPPORTED If input size is greater than the maximum supported buffer size.\r | |
765 | \r | |
766 | **/\r | |
767 | EFI_STATUS\r | |
768 | EFIAPI\r | |
769 | VariableExLibGetScratchBuffer (\r | |
770 | IN OUT UINTN *ScratchBufferSize,\r | |
771 | OUT VOID **ScratchBuffer\r | |
772 | );\r | |
773 | \r | |
774 | /**\r | |
775 | This function is to check if the remaining variable space is enough to set\r | |
776 | all Variables from argument list successfully. The purpose of the check\r | |
777 | is to keep the consistency of the Variables to be in variable storage.\r | |
778 | \r | |
779 | Note: Variables are assumed to be in same storage.\r | |
780 | The set sequence of Variables will be same with the sequence of VariableEntry from argument list,\r | |
781 | so follow the argument sequence to check the Variables.\r | |
782 | \r | |
783 | @param[in] Attributes Variable attributes for Variable entries.\r | |
784 | @param ... The variable argument list with type VARIABLE_ENTRY_CONSISTENCY *.\r | |
785 | A NULL terminates the list. The VariableSize of\r | |
786 | VARIABLE_ENTRY_CONSISTENCY is the variable data size as input.\r | |
787 | It will be changed to variable total size as output.\r | |
788 | \r | |
789 | @retval TRUE Have enough variable space to set the Variables successfully.\r | |
790 | @retval FALSE No enough variable space to set the Variables successfully.\r | |
791 | \r | |
792 | **/\r | |
793 | BOOLEAN\r | |
794 | EFIAPI\r | |
795 | VariableExLibCheckRemainingSpaceForConsistency (\r | |
796 | IN UINT32 Attributes,\r | |
797 | ...\r | |
798 | );\r | |
799 | \r | |
800 | /**\r | |
801 | Return TRUE if at OS runtime.\r | |
802 | \r | |
803 | @retval TRUE If at OS runtime.\r | |
804 | @retval FALSE If at boot time.\r | |
805 | \r | |
806 | **/\r | |
807 | BOOLEAN\r | |
808 | EFIAPI\r | |
809 | VariableExLibAtRuntime (\r | |
810 | VOID\r | |
811 | );\r | |
812 | \r | |
8d3a5c82 | 813 | #endif\r |