/** @file\r
-\r
The internal header file includes the common header files, defines\r
- internal structure and functions used by RuntimeVariable module.\r
+ internal structure and functions used by Variable modules.\r
\r
-Copyright (c) 2006 - 2008, Intel Corporation\r
-All rights reserved. This program and the accompanying materials\r
+Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>\r
+This program and the accompanying materials\r
are licensed and made available under the terms and conditions of the BSD License\r
which accompanies this distribution. The full text of the license may be found at\r
http://opensource.org/licenses/bsd-license.php\r
\r
**/\r
\r
-#ifndef _VARIABLE_H\r
-#define _VARIABLE_H\r
+#ifndef _VARIABLE_H_\r
+#define _VARIABLE_H_\r
\r
#include <PiDxe.h>\r
#include <Protocol/VariableWrite.h>\r
-#include <Protocol/FaultTolerantWriteLite.h>\r
+#include <Protocol/FaultTolerantWrite.h>\r
#include <Protocol/FirmwareVolumeBlock.h>\r
#include <Protocol/Variable.h>\r
+#include <Protocol/VariableLock.h>\r
+#include <Protocol/VarCheck.h>\r
#include <Library/PcdLib.h>\r
+#include <Library/HobLib.h>\r
#include <Library/UefiDriverEntryPoint.h>\r
#include <Library/DxeServicesTableLib.h>\r
#include <Library/UefiRuntimeLib.h>\r
#include <Library/DebugLib.h>\r
#include <Library/BaseMemoryLib.h>\r
-#include <Library/FvbServiceLib.h>\r
#include <Library/UefiBootServicesTableLib.h>\r
#include <Library/UefiLib.h>\r
#include <Library/BaseLib.h>\r
+#include <Library/SynchronizationLib.h>\r
#include <Library/MemoryAllocationLib.h>\r
-#include <Guid/VariableInfo.h>\r
+#include <Library/AuthVariableLib.h>\r
+#include <Library/VarCheckLib.h>\r
#include <Guid/GlobalVariable.h>\r
-#include <VariableFormat.h>\r
-\r
-\r
+#include <Guid/EventGroup.h>\r
+#include <Guid/VariableFormat.h>\r
+#include <Guid/SystemNvDataGuid.h>\r
+#include <Guid/FaultTolerantWrite.h>\r
+#include <Guid/VarErrorFlag.h>\r
\r
-#define VARIABLE_RECLAIM_THRESHOLD (1024)\r
+#include "PrivilegePolymorphic.h"\r
\r
-#define VARIABLE_STORE_SIZE FixedPcdGet32(PcdVariableStoreSize)\r
-#define SCRATCH_SIZE FixedPcdGet32(PcdMaxVariableSize)\r
-\r
-//\r
-// Define GET_PAD_SIZE to optimize compiler\r
-//\r
-#if ((ALIGNMENT == 0) || (ALIGNMENT == 1))\r
-#define GET_PAD_SIZE(a) (0)\r
-#else\r
-#define GET_PAD_SIZE(a) (((~a) + 1) & (ALIGNMENT - 1))\r
-#endif\r
+#define EFI_VARIABLE_ATTRIBUTES_MASK (EFI_VARIABLE_NON_VOLATILE | \\r
+ EFI_VARIABLE_BOOTSERVICE_ACCESS | \\r
+ EFI_VARIABLE_RUNTIME_ACCESS | \\r
+ EFI_VARIABLE_HARDWARE_ERROR_RECORD | \\r
+ EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \\r
+ EFI_VARIABLE_APPEND_WRITE)\r
\r
-#define HEADER_ALIGN(Header) (((UINTN) (Header) + HEADER_ALIGNMENT - 1) & (~(HEADER_ALIGNMENT - 1)))\r
+///\r
+/// The size of a 3 character ISO639 language code.\r
+///\r
+#define ISO_639_2_ENTRY_SIZE 3\r
\r
+typedef enum {\r
+ VariableStoreTypeVolatile,\r
+ VariableStoreTypeHob,\r
+ VariableStoreTypeNv,\r
+ VariableStoreTypeMax\r
+} VARIABLE_STORE_TYPE;\r
\r
typedef struct {\r
VARIABLE_HEADER *CurrPtr;\r
+ //\r
+ // If both ADDED and IN_DELETED_TRANSITION variable are present,\r
+ // InDeletedTransitionPtr will point to the IN_DELETED_TRANSITION one.\r
+ // Otherwise, CurrPtr will point to the ADDED or IN_DELETED_TRANSITION one,\r
+ // and InDeletedTransitionPtr will be NULL at the same time.\r
+ //\r
+ VARIABLE_HEADER *InDeletedTransitionPtr;\r
VARIABLE_HEADER *EndPtr;\r
VARIABLE_HEADER *StartPtr;\r
BOOLEAN Volatile;\r
} VARIABLE_POINTER_TRACK;\r
\r
typedef struct {\r
+ EFI_PHYSICAL_ADDRESS HobVariableBase;\r
EFI_PHYSICAL_ADDRESS VolatileVariableBase;\r
EFI_PHYSICAL_ADDRESS NonVolatileVariableBase;\r
EFI_LOCK VariableServicesLock;\r
UINT32 ReentrantState;\r
+ BOOLEAN AuthFormat;\r
+ BOOLEAN AuthSupport;\r
} VARIABLE_GLOBAL;\r
\r
typedef struct {\r
VARIABLE_GLOBAL VariableGlobal;\r
UINTN VolatileLastVariableOffset;\r
UINTN NonVolatileLastVariableOffset;\r
- UINT32 FvbInstance;\r
+ UINTN CommonVariableSpace;\r
+ UINTN CommonMaxUserVariableSpace;\r
+ UINTN CommonRuntimeVariableSpace;\r
+ UINTN CommonVariableTotalSize;\r
+ UINTN CommonUserVariableTotalSize;\r
+ UINTN HwErrVariableTotalSize;\r
+ UINTN MaxVariableSize;\r
+ UINTN MaxAuthVariableSize;\r
+ UINTN MaxVolatileVariableSize;\r
+ UINTN ScratchBufferSize;\r
+ CHAR8 *PlatformLangCodes;\r
+ CHAR8 *LangCodes;\r
+ CHAR8 *PlatformLang;\r
+ CHAR8 Lang[ISO_639_2_ENTRY_SIZE + 1];\r
+ EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *FvbInstance;\r
} VARIABLE_MODULE_GLOBAL;\r
\r
-typedef struct {\r
- EFI_GUID *Guid;\r
- CHAR16 *Name;\r
- UINT32 Attributes;\r
- UINTN DataSize;\r
- VOID *Data;\r
-} VARIABLE_CACHE_ENTRY;\r
+/**\r
+ Flush the HOB variable to flash.\r
+\r
+ @param[in] VariableName Name of variable has been updated or deleted.\r
+ @param[in] VendorGuid Guid of variable has been updated or deleted.\r
+\r
+**/\r
+VOID\r
+FlushHobVariableToFlash (\r
+ IN CHAR16 *VariableName,\r
+ IN EFI_GUID *VendorGuid\r
+ );\r
+\r
+/**\r
+ Writes a buffer to variable storage space, in the working block.\r
+\r
+ This function writes a buffer to variable storage space into a firmware\r
+ volume block device. The destination is specified by the parameter\r
+ VariableBase. Fault Tolerant Write protocol is used for writing.\r
+\r
+ @param VariableBase Base address of the variable to write.\r
+ @param VariableBuffer Point to the variable data buffer.\r
+\r
+ @retval EFI_SUCCESS The function completed successfully.\r
+ @retval EFI_NOT_FOUND Fail to locate Fault Tolerant Write protocol.\r
+ @retval EFI_ABORTED The function could not complete successfully.\r
+\r
+**/\r
+EFI_STATUS\r
+FtwVariableSpace (\r
+ IN EFI_PHYSICAL_ADDRESS VariableBase,\r
+ IN VARIABLE_STORE_HEADER *VariableBuffer\r
+ );\r
\r
+/**\r
+ Finds variable in storage blocks of volatile and non-volatile storage areas.\r
\r
-//\r
-// Functions\r
-//\r
+ This code finds variable in storage blocks of volatile and non-volatile storage areas.\r
+ If VariableName is an empty string, then we just return the first\r
+ qualified variable without comparing VariableName and VendorGuid.\r
+ If IgnoreRtCheck is TRUE, then we ignore the EFI_VARIABLE_RUNTIME_ACCESS attribute check\r
+ at runtime when searching existing variable, only VariableName and VendorGuid are compared.\r
+ Otherwise, variables without EFI_VARIABLE_RUNTIME_ACCESS are not visible at runtime.\r
\r
+ @param[in] VariableName Name of the variable to be found.\r
+ @param[in] VendorGuid Vendor GUID to be found.\r
+ @param[out] PtrTrack VARIABLE_POINTER_TRACK structure for output,\r
+ including the range searched and the target position.\r
+ @param[in] Global Pointer to VARIABLE_GLOBAL structure, including\r
+ base of volatile variable storage area, base of\r
+ NV variable storage area, and a lock.\r
+ @param[in] IgnoreRtCheck Ignore EFI_VARIABLE_RUNTIME_ACCESS attribute\r
+ check at runtime when searching variable.\r
+\r
+ @retval EFI_INVALID_PARAMETER If VariableName is not an empty string, while\r
+ VendorGuid is NULL.\r
+ @retval EFI_SUCCESS Variable successfully found.\r
+ @retval EFI_NOT_FOUND Variable not found\r
+\r
+**/\r
EFI_STATUS\r
+FindVariable (\r
+ IN CHAR16 *VariableName,\r
+ IN EFI_GUID *VendorGuid,\r
+ OUT VARIABLE_POINTER_TRACK *PtrTrack,\r
+ IN VARIABLE_GLOBAL *Global,\r
+ IN BOOLEAN IgnoreRtCheck\r
+ );\r
+\r
+/**\r
+\r
+ Gets the pointer to the end of the variable storage area.\r
+\r
+ This function gets pointer to the end of the variable storage\r
+ area, according to the input variable store header.\r
+\r
+ @param VarStoreHeader Pointer to the Variable Store Header.\r
+\r
+ @return Pointer to the end of the variable storage area.\r
+\r
+**/\r
+VARIABLE_HEADER *\r
+GetEndPointer (\r
+ IN VARIABLE_STORE_HEADER *VarStoreHeader\r
+ );\r
+\r
+/**\r
+ This code gets the size of variable header.\r
+\r
+ @return Size of variable header in bytes in type UINTN.\r
+\r
+**/\r
+UINTN\r
+GetVariableHeaderSize (\r
+ VOID\r
+ );\r
+\r
+/**\r
+\r
+ This code gets the pointer to the variable name.\r
+\r
+ @param Variable Pointer to the Variable Header.\r
+\r
+ @return Pointer to Variable Name which is Unicode encoding.\r
+\r
+**/\r
+CHAR16 *\r
+GetVariableNamePtr (\r
+ IN VARIABLE_HEADER *Variable\r
+ );\r
+\r
+/**\r
+ This code gets the pointer to the variable guid.\r
+\r
+ @param Variable Pointer to the Variable Header.\r
+\r
+ @return A EFI_GUID* pointer to Vendor Guid.\r
+\r
+**/\r
+EFI_GUID *\r
+GetVendorGuidPtr (\r
+ IN VARIABLE_HEADER *Variable\r
+ );\r
+\r
+/**\r
+\r
+ This code gets the pointer to the variable data.\r
+\r
+ @param Variable Pointer to the Variable Header.\r
+\r
+ @return Pointer to Variable Data.\r
+\r
+**/\r
+UINT8 *\r
+GetVariableDataPtr (\r
+ IN VARIABLE_HEADER *Variable\r
+ );\r
+\r
+/**\r
+\r
+ This code gets the size of variable data.\r
+\r
+ @param Variable Pointer to the Variable Header.\r
+\r
+ @return Size of variable in bytes.\r
+\r
+**/\r
+UINTN\r
+DataSizeOfVariable (\r
+ IN VARIABLE_HEADER *Variable\r
+ );\r
+\r
+/**\r
+ This function is to check if the remaining variable space is enough to set\r
+ all Variables from argument list successfully. The purpose of the check\r
+ is to keep the consistency of the Variables to be in variable storage.\r
+\r
+ Note: Variables are assumed to be in same storage.\r
+ The set sequence of Variables will be same with the sequence of VariableEntry from argument list,\r
+ so follow the argument sequence to check the Variables.\r
+\r
+ @param[in] Attributes Variable attributes for Variable entries.\r
+ @param[in] Marker VA_LIST style variable argument list.\r
+ The variable argument list with type VARIABLE_ENTRY_CONSISTENCY *.\r
+ A NULL terminates the list. The VariableSize of\r
+ VARIABLE_ENTRY_CONSISTENCY is the variable data size as input.\r
+ It will be changed to variable total size as output.\r
+\r
+ @retval TRUE Have enough variable space to set the Variables successfully.\r
+ @retval FALSE No enough variable space to set the Variables successfully.\r
+\r
+**/\r
+BOOLEAN\r
EFIAPI\r
-VariableServiceInitialize (\r
- IN EFI_HANDLE ImageHandle,\r
- IN EFI_SYSTEM_TABLE *SystemTable\r
+CheckRemainingSpaceForConsistencyInternal (\r
+ IN UINT32 Attributes,\r
+ IN VA_LIST Marker\r
);\r
\r
+/**\r
+ Update the variable region with Variable information. If EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS is set,\r
+ index of associated public key is needed.\r
+\r
+ @param[in] VariableName Name of variable.\r
+ @param[in] VendorGuid Guid of variable.\r
+ @param[in] Data Variable data.\r
+ @param[in] DataSize Size of data. 0 means delete.\r
+ @param[in] Attributes Attributes of the variable.\r
+ @param[in] KeyIndex Index of associated public key.\r
+ @param[in] MonotonicCount Value of associated monotonic count.\r
+ @param[in, out] Variable The variable information that is used to keep track of variable usage.\r
+\r
+ @param[in] TimeStamp Value of associated TimeStamp.\r
\r
+ @retval EFI_SUCCESS The update operation is success.\r
+ @retval EFI_OUT_OF_RESOURCES Variable region is full, cannot write other data into this region.\r
+\r
+**/\r
EFI_STATUS\r
-FtwVariableSpace (\r
- IN EFI_PHYSICAL_ADDRESS VariableBaseAddress,\r
- IN UINT8 *Buffer,\r
- IN UINTN BufferSize\r
+UpdateVariable (\r
+ IN CHAR16 *VariableName,\r
+ IN EFI_GUID *VendorGuid,\r
+ IN VOID *Data,\r
+ IN UINTN DataSize,\r
+ IN UINT32 Attributes OPTIONAL,\r
+ IN UINT32 KeyIndex OPTIONAL,\r
+ IN UINT64 MonotonicCount OPTIONAL,\r
+ IN OUT VARIABLE_POINTER_TRACK *Variable,\r
+ IN EFI_TIME *TimeStamp OPTIONAL\r
+ );\r
+\r
+\r
+/**\r
+ Return TRUE if ExitBootServices () has been called.\r
+\r
+ @retval TRUE If ExitBootServices () has been called.\r
+**/\r
+BOOLEAN\r
+AtRuntime (\r
+ VOID\r
+ );\r
+\r
+/**\r
+ Initializes a basic mutual exclusion lock.\r
+\r
+ This function initializes a basic mutual exclusion lock to the released state\r
+ and returns the lock. Each lock provides mutual exclusion access at its task\r
+ priority level. Since there is no preemption or multiprocessor support in EFI,\r
+ acquiring the lock only consists of raising to the locks TPL.\r
+ If Lock is NULL, then ASSERT().\r
+ If Priority is not a valid TPL value, then ASSERT().\r
+\r
+ @param Lock A pointer to the lock data structure to initialize.\r
+ @param Priority EFI TPL is associated with the lock.\r
+\r
+ @return The lock.\r
+\r
+**/\r
+EFI_LOCK *\r
+InitializeLock (\r
+ IN OUT EFI_LOCK *Lock,\r
+ IN EFI_TPL Priority\r
+ );\r
+\r
+\r
+/**\r
+ Acquires lock only at boot time. Simply returns at runtime.\r
+\r
+ This is a temperary function that will be removed when\r
+ EfiAcquireLock() in UefiLib can handle the call in UEFI\r
+ Runtimer driver in RT phase.\r
+ It calls EfiAcquireLock() at boot time, and simply returns\r
+ at runtime.\r
+\r
+ @param Lock A pointer to the lock to acquire.\r
+\r
+**/\r
+VOID\r
+AcquireLockOnlyAtBootTime (\r
+ IN EFI_LOCK *Lock\r
+ );\r
+\r
+\r
+/**\r
+ Releases lock only at boot time. Simply returns at runtime.\r
+\r
+ This is a temperary function which will be removed when\r
+ EfiReleaseLock() in UefiLib can handle the call in UEFI\r
+ Runtimer driver in RT phase.\r
+ It calls EfiReleaseLock() at boot time and simply returns\r
+ at runtime.\r
+\r
+ @param Lock A pointer to the lock to release.\r
+\r
+**/\r
+VOID\r
+ReleaseLockOnlyAtBootTime (\r
+ IN EFI_LOCK *Lock\r
+ );\r
+\r
+/**\r
+ Retrieve the FVB protocol interface by HANDLE.\r
+\r
+ @param[in] FvBlockHandle The handle of FVB protocol that provides services for\r
+ reading, writing, and erasing the target block.\r
+ @param[out] FvBlock The interface of FVB protocol\r
+\r
+ @retval EFI_SUCCESS The interface information for the specified protocol was returned.\r
+ @retval EFI_UNSUPPORTED The device does not support the FVB protocol.\r
+ @retval EFI_INVALID_PARAMETER FvBlockHandle is not a valid EFI_HANDLE or FvBlock is NULL.\r
+\r
+**/\r
+EFI_STATUS\r
+GetFvbByHandle (\r
+ IN EFI_HANDLE FvBlockHandle,\r
+ OUT EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL **FvBlock\r
+ );\r
+\r
+/**\r
+ Function returns an array of handles that support the FVB protocol\r
+ in a buffer allocated from pool.\r
+\r
+ @param[out] NumberHandles The number of handles returned in Buffer.\r
+ @param[out] Buffer A pointer to the buffer to return the requested\r
+ array of handles that support FVB protocol.\r
+\r
+ @retval EFI_SUCCESS The array of handles was returned in Buffer, and the number of\r
+ handles in Buffer was returned in NumberHandles.\r
+ @retval EFI_NOT_FOUND No FVB handle was found.\r
+ @retval EFI_OUT_OF_RESOURCES There is not enough pool memory to store the matching results.\r
+ @retval EFI_INVALID_PARAMETER NumberHandles is NULL or Buffer is NULL.\r
+\r
+**/\r
+EFI_STATUS\r
+GetFvbCountAndBuffer (\r
+ OUT UINTN *NumberHandles,\r
+ OUT EFI_HANDLE **Buffer\r
+ );\r
+\r
+/**\r
+ Initializes variable store area for non-volatile and volatile variable.\r
+\r
+ @retval EFI_SUCCESS Function successfully executed.\r
+ @retval EFI_OUT_OF_RESOURCES Fail to allocate enough memory resource.\r
+\r
+**/\r
+EFI_STATUS\r
+VariableCommonInitialize (\r
+ VOID\r
+ );\r
+\r
+/**\r
+ This function reclaims variable storage if free size is below the threshold.\r
+\r
+**/\r
+VOID\r
+ReclaimForOS(\r
+ VOID\r
+ );\r
+\r
+/**\r
+ Get non-volatile maximum variable size.\r
+\r
+ @return Non-volatile maximum variable size.\r
+\r
+**/\r
+UINTN\r
+GetNonVolatileMaxVariableSize (\r
+ VOID\r
+ );\r
+\r
+/**\r
+ Get maximum variable size, covering both non-volatile and volatile variables.\r
+\r
+ @return Maximum variable size.\r
+\r
+**/\r
+UINTN\r
+GetMaxVariableSize (\r
+ VOID\r
+ );\r
+\r
+/**\r
+ Initializes variable write service after FVB was ready.\r
+\r
+ @retval EFI_SUCCESS Function successfully executed.\r
+ @retval Others Fail to initialize the variable service.\r
+\r
+**/\r
+EFI_STATUS\r
+VariableWriteServiceInitialize (\r
+ VOID\r
+ );\r
+\r
+/**\r
+ Retrieve the SMM Fault Tolerent Write protocol interface.\r
+\r
+ @param[out] FtwProtocol The interface of SMM Ftw protocol\r
+\r
+ @retval EFI_SUCCESS The SMM SAR protocol instance was found and returned in SarProtocol.\r
+ @retval EFI_NOT_FOUND The SMM SAR protocol instance was not found.\r
+ @retval EFI_INVALID_PARAMETER SarProtocol is NULL.\r
+\r
+**/\r
+EFI_STATUS\r
+GetFtwProtocol (\r
+ OUT VOID **FtwProtocol\r
+ );\r
+\r
+/**\r
+ Get the proper fvb handle and/or fvb protocol by the given Flash address.\r
+\r
+ @param[in] Address The Flash address.\r
+ @param[out] FvbHandle In output, if it is not NULL, it points to the proper FVB handle.\r
+ @param[out] FvbProtocol In output, if it is not NULL, it points to the proper FVB protocol.\r
+\r
+**/\r
+EFI_STATUS\r
+GetFvbInfoByAddress (\r
+ IN EFI_PHYSICAL_ADDRESS Address,\r
+ OUT EFI_HANDLE *FvbHandle OPTIONAL,\r
+ OUT EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL **FvbProtocol OPTIONAL\r
+ );\r
+\r
+/**\r
+\r
+ This code finds variable in storage blocks (Volatile or Non-Volatile).\r
+\r
+ Caution: This function may receive untrusted input.\r
+ This function may be invoked in SMM mode, and datasize and data are external input.\r
+ This function will do basic validation, before parse the data.\r
+\r
+ @param VariableName Name of Variable to be found.\r
+ @param VendorGuid Variable vendor GUID.\r
+ @param Attributes Attribute value of the variable found.\r
+ @param DataSize Size of Data found. If size is less than the\r
+ data, this value contains the required size.\r
+ @param Data The buffer to return the contents of the variable. May be NULL\r
+ with a zero DataSize in order to determine the size buffer needed.\r
+\r
+ @return EFI_INVALID_PARAMETER Invalid parameter.\r
+ @return EFI_SUCCESS Find the specified variable.\r
+ @return EFI_NOT_FOUND Not found.\r
+ @return EFI_BUFFER_TO_SMALL DataSize is too small for the result.\r
+\r
+**/\r
+EFI_STATUS\r
+EFIAPI\r
+VariableServiceGetVariable (\r
+ IN CHAR16 *VariableName,\r
+ IN EFI_GUID *VendorGuid,\r
+ OUT UINT32 *Attributes OPTIONAL,\r
+ IN OUT UINTN *DataSize,\r
+ OUT VOID *Data OPTIONAL\r
+ );\r
+\r
+/**\r
+ This code Finds the Next available variable.\r
+\r
+ Caution: This function may receive untrusted input.\r
+ This function may be invoked in SMM mode. This function will do basic validation, before parse the data.\r
+\r
+ @param[in] VariableName Pointer to variable name.\r
+ @param[in] VendorGuid Variable Vendor Guid.\r
+ @param[out] VariablePtr Pointer to variable header address.\r
+\r
+ @retval EFI_SUCCESS The function completed successfully.\r
+ @retval EFI_NOT_FOUND The next variable was not found.\r
+ @retval EFI_INVALID_PARAMETER If VariableName is not an empty string, while VendorGuid is NULL.\r
+ @retval EFI_INVALID_PARAMETER The input values of VariableName and VendorGuid are not a name and\r
+ GUID of an existing variable.\r
+\r
+**/\r
+EFI_STATUS\r
+EFIAPI\r
+VariableServiceGetNextVariableInternal (\r
+ IN CHAR16 *VariableName,\r
+ IN EFI_GUID *VendorGuid,\r
+ OUT VARIABLE_HEADER **VariablePtr\r
+ );\r
+\r
+/**\r
+\r
+ This code Finds the Next available variable.\r
+\r
+ Caution: This function may receive untrusted input.\r
+ This function may be invoked in SMM mode. This function will do basic validation, before parse the data.\r
+\r
+ @param VariableNameSize The size of the VariableName buffer. The size must be large\r
+ enough to fit input string supplied in VariableName buffer.\r
+ @param VariableName Pointer to variable name.\r
+ @param VendorGuid Variable Vendor Guid.\r
+\r
+ @retval EFI_SUCCESS The function completed successfully.\r
+ @retval EFI_NOT_FOUND The next variable was not found.\r
+ @retval EFI_BUFFER_TOO_SMALL The VariableNameSize is too small for the result.\r
+ VariableNameSize has been updated with the size needed to complete the request.\r
+ @retval EFI_INVALID_PARAMETER VariableNameSize is NULL.\r
+ @retval EFI_INVALID_PARAMETER VariableName is NULL.\r
+ @retval EFI_INVALID_PARAMETER VendorGuid is NULL.\r
+ @retval EFI_INVALID_PARAMETER The input values of VariableName and VendorGuid are not a name and\r
+ GUID of an existing variable.\r
+ @retval EFI_INVALID_PARAMETER Null-terminator is not found in the first VariableNameSize bytes of\r
+ the input VariableName buffer.\r
+\r
+**/\r
+EFI_STATUS\r
+EFIAPI\r
+VariableServiceGetNextVariableName (\r
+ IN OUT UINTN *VariableNameSize,\r
+ IN OUT CHAR16 *VariableName,\r
+ IN OUT EFI_GUID *VendorGuid\r
+ );\r
+\r
+/**\r
+\r
+ This code sets variable in storage blocks (Volatile or Non-Volatile).\r
+\r
+ Caution: This function may receive untrusted input.\r
+ This function may be invoked in SMM mode, and datasize and data are external input.\r
+ This function will do basic validation, before parse the data.\r
+ This function will parse the authentication carefully to avoid security issues, like\r
+ buffer overflow, integer overflow.\r
+ This function will check attribute carefully to avoid authentication bypass.\r
+\r
+ @param VariableName Name of Variable to be found.\r
+ @param VendorGuid Variable vendor GUID.\r
+ @param Attributes Attribute value of the variable found\r
+ @param DataSize Size of Data found. If size is less than the\r
+ data, this value contains the required size.\r
+ @param Data Data pointer.\r
+\r
+ @return EFI_INVALID_PARAMETER Invalid parameter.\r
+ @return EFI_SUCCESS Set successfully.\r
+ @return EFI_OUT_OF_RESOURCES Resource not enough to set variable.\r
+ @return EFI_NOT_FOUND Not found.\r
+ @return EFI_WRITE_PROTECTED Variable is read-only.\r
+\r
+**/\r
+EFI_STATUS\r
+EFIAPI\r
+VariableServiceSetVariable (\r
+ IN CHAR16 *VariableName,\r
+ IN EFI_GUID *VendorGuid,\r
+ IN UINT32 Attributes,\r
+ IN UINTN DataSize,\r
+ IN VOID *Data\r
+ );\r
+\r
+/**\r
+\r
+ This code returns information about the EFI variables.\r
+\r
+ Caution: This function may receive untrusted input.\r
+ This function may be invoked in SMM mode. This function will do basic validation, before parse the data.\r
+\r
+ @param Attributes Attributes bitmask to specify the type of variables\r
+ on which to return information.\r
+ @param MaximumVariableStorageSize Pointer to the maximum size of the storage space available\r
+ for the EFI variables associated with the attributes specified.\r
+ @param RemainingVariableStorageSize Pointer to the remaining size of the storage space available\r
+ for EFI variables associated with the attributes specified.\r
+ @param MaximumVariableSize Pointer to the maximum size of an individual EFI variables\r
+ associated with the attributes specified.\r
+\r
+ @return EFI_SUCCESS Query successfully.\r
+\r
+**/\r
+EFI_STATUS\r
+EFIAPI\r
+VariableServiceQueryVariableInfoInternal (\r
+ IN UINT32 Attributes,\r
+ OUT UINT64 *MaximumVariableStorageSize,\r
+ OUT UINT64 *RemainingVariableStorageSize,\r
+ OUT UINT64 *MaximumVariableSize\r
+ );\r
+\r
+/**\r
+\r
+ This code returns information about the EFI variables.\r
+\r
+ Caution: This function may receive untrusted input.\r
+ This function may be invoked in SMM mode. This function will do basic validation, before parse the data.\r
+\r
+ @param Attributes Attributes bitmask to specify the type of variables\r
+ on which to return information.\r
+ @param MaximumVariableStorageSize Pointer to the maximum size of the storage space available\r
+ for the EFI variables associated with the attributes specified.\r
+ @param RemainingVariableStorageSize Pointer to the remaining size of the storage space available\r
+ for EFI variables associated with the attributes specified.\r
+ @param MaximumVariableSize Pointer to the maximum size of an individual EFI variables\r
+ associated with the attributes specified.\r
+\r
+ @return EFI_INVALID_PARAMETER An invalid combination of attribute bits was supplied.\r
+ @return EFI_SUCCESS Query successfully.\r
+ @return EFI_UNSUPPORTED The attribute is not supported on this platform.\r
+\r
+**/\r
+EFI_STATUS\r
+EFIAPI\r
+VariableServiceQueryVariableInfo (\r
+ IN UINT32 Attributes,\r
+ OUT UINT64 *MaximumVariableStorageSize,\r
+ OUT UINT64 *RemainingVariableStorageSize,\r
+ OUT UINT64 *MaximumVariableSize\r
+ );\r
+\r
+/**\r
+ Mark a variable that will become read-only after leaving the DXE phase of execution.\r
+\r
+ @param[in] This The VARIABLE_LOCK_PROTOCOL instance.\r
+ @param[in] VariableName A pointer to the variable name that will be made read-only subsequently.\r
+ @param[in] VendorGuid A pointer to the vendor GUID that will be made read-only subsequently.\r
+\r
+ @retval EFI_SUCCESS The variable specified by the VariableName and the VendorGuid was marked\r
+ as pending to be read-only.\r
+ @retval EFI_INVALID_PARAMETER VariableName or VendorGuid is NULL.\r
+ Or VariableName is an empty string.\r
+ @retval EFI_ACCESS_DENIED EFI_END_OF_DXE_EVENT_GROUP_GUID or EFI_EVENT_GROUP_READY_TO_BOOT has\r
+ already been signaled.\r
+ @retval EFI_OUT_OF_RESOURCES There is not enough resource to hold the lock request.\r
+**/\r
+EFI_STATUS\r
+EFIAPI\r
+VariableLockRequestToLock (\r
+ IN CONST EDKII_VARIABLE_LOCK_PROTOCOL *This,\r
+ IN CHAR16 *VariableName,\r
+ IN EFI_GUID *VendorGuid\r
+ );\r
+\r
+/**\r
+ Register SetVariable check handler.\r
+\r
+ @param[in] Handler Pointer to check handler.\r
+\r
+ @retval EFI_SUCCESS The SetVariable check handler was registered successfully.\r
+ @retval EFI_INVALID_PARAMETER Handler is NULL.\r
+ @retval EFI_ACCESS_DENIED EFI_END_OF_DXE_EVENT_GROUP_GUID or EFI_EVENT_GROUP_READY_TO_BOOT has\r
+ already been signaled.\r
+ @retval EFI_OUT_OF_RESOURCES There is not enough resource for the SetVariable check handler register request.\r
+ @retval EFI_UNSUPPORTED This interface is not implemented.\r
+ For example, it is unsupported in VarCheck protocol if both VarCheck and SmmVarCheck protocols are present.\r
+\r
+**/\r
+EFI_STATUS\r
+EFIAPI\r
+VarCheckRegisterSetVariableCheckHandler (\r
+ IN VAR_CHECK_SET_VARIABLE_CHECK_HANDLER Handler\r
+ );\r
+\r
+/**\r
+ Variable property set.\r
+\r
+ @param[in] Name Pointer to the variable name.\r
+ @param[in] Guid Pointer to the vendor GUID.\r
+ @param[in] VariableProperty Pointer to the input variable property.\r
+\r
+ @retval EFI_SUCCESS The property of variable specified by the Name and Guid was set successfully.\r
+ @retval EFI_INVALID_PARAMETER Name, Guid or VariableProperty is NULL, or Name is an empty string,\r
+ or the fields of VariableProperty are not valid.\r
+ @retval EFI_ACCESS_DENIED EFI_END_OF_DXE_EVENT_GROUP_GUID or EFI_EVENT_GROUP_READY_TO_BOOT has\r
+ already been signaled.\r
+ @retval EFI_OUT_OF_RESOURCES There is not enough resource for the variable property set request.\r
+\r
+**/\r
+EFI_STATUS\r
+EFIAPI\r
+VarCheckVariablePropertySet (\r
+ IN CHAR16 *Name,\r
+ IN EFI_GUID *Guid,\r
+ IN VAR_CHECK_VARIABLE_PROPERTY *VariableProperty\r
+ );\r
+\r
+/**\r
+ Variable property get.\r
+\r
+ @param[in] Name Pointer to the variable name.\r
+ @param[in] Guid Pointer to the vendor GUID.\r
+ @param[out] VariableProperty Pointer to the output variable property.\r
+\r
+ @retval EFI_SUCCESS The property of variable specified by the Name and Guid was got successfully.\r
+ @retval EFI_INVALID_PARAMETER Name, Guid or VariableProperty is NULL, or Name is an empty string.\r
+ @retval EFI_NOT_FOUND The property of variable specified by the Name and Guid was not found.\r
+\r
+**/\r
+EFI_STATUS\r
+EFIAPI\r
+VarCheckVariablePropertyGet (\r
+ IN CHAR16 *Name,\r
+ IN EFI_GUID *Guid,\r
+ OUT VAR_CHECK_VARIABLE_PROPERTY *VariableProperty\r
+ );\r
+\r
+/**\r
+ Initialize variable quota.\r
+\r
+**/\r
+VOID\r
+InitializeVariableQuota (\r
+ VOID\r
+ );\r
+\r
+extern VARIABLE_MODULE_GLOBAL *mVariableModuleGlobal;\r
+\r
+extern AUTH_VAR_LIB_CONTEXT_OUT mAuthContextOut;\r
+\r
+/**\r
+ Finds variable in storage blocks of volatile and non-volatile storage areas.\r
+\r
+ This code finds variable in storage blocks of volatile and non-volatile storage areas.\r
+ If VariableName is an empty string, then we just return the first\r
+ qualified variable without comparing VariableName and VendorGuid.\r
+\r
+ @param[in] VariableName Name of the variable to be found.\r
+ @param[in] VendorGuid Variable vendor GUID to be found.\r
+ @param[out] AuthVariableInfo Pointer to AUTH_VARIABLE_INFO structure for\r
+ output of the variable found.\r
+\r
+ @retval EFI_INVALID_PARAMETER If VariableName is not an empty string,\r
+ while VendorGuid is NULL.\r
+ @retval EFI_SUCCESS Variable successfully found.\r
+ @retval EFI_NOT_FOUND Variable not found\r
+\r
+**/\r
+EFI_STATUS\r
+EFIAPI\r
+VariableExLibFindVariable (\r
+ IN CHAR16 *VariableName,\r
+ IN EFI_GUID *VendorGuid,\r
+ OUT AUTH_VARIABLE_INFO *AuthVariableInfo\r
+ );\r
+\r
+/**\r
+ Finds next variable in storage blocks of volatile and non-volatile storage areas.\r
+\r
+ This code finds next variable in storage blocks of volatile and non-volatile storage areas.\r
+ If VariableName is an empty string, then we just return the first\r
+ qualified variable without comparing VariableName and VendorGuid.\r
+\r
+ @param[in] VariableName Name of the variable to be found.\r
+ @param[in] VendorGuid Variable vendor GUID to be found.\r
+ @param[out] AuthVariableInfo Pointer to AUTH_VARIABLE_INFO structure for\r
+ output of the next variable.\r
+\r
+ @retval EFI_INVALID_PARAMETER If VariableName is not an empty string,\r
+ while VendorGuid is NULL.\r
+ @retval EFI_SUCCESS Variable successfully found.\r
+ @retval EFI_NOT_FOUND Variable not found\r
+\r
+**/\r
+EFI_STATUS\r
+EFIAPI\r
+VariableExLibFindNextVariable (\r
+ IN CHAR16 *VariableName,\r
+ IN EFI_GUID *VendorGuid,\r
+ OUT AUTH_VARIABLE_INFO *AuthVariableInfo\r
+ );\r
+\r
+/**\r
+ Update the variable region with Variable information.\r
+\r
+ @param[in] AuthVariableInfo Pointer AUTH_VARIABLE_INFO structure for\r
+ input of the variable.\r
+\r
+ @retval EFI_SUCCESS The update operation is success.\r
+ @retval EFI_INVALID_PARAMETER Invalid parameter.\r
+ @retval EFI_WRITE_PROTECTED Variable is write-protected.\r
+ @retval EFI_OUT_OF_RESOURCES There is not enough resource.\r
+\r
+**/\r
+EFI_STATUS\r
+EFIAPI\r
+VariableExLibUpdateVariable (\r
+ IN AUTH_VARIABLE_INFO *AuthVariableInfo\r
+ );\r
+\r
+/**\r
+ Get scratch buffer.\r
+\r
+ @param[in, out] ScratchBufferSize Scratch buffer size. If input size is greater than\r
+ the maximum supported buffer size, this value contains\r
+ the maximum supported buffer size as output.\r
+ @param[out] ScratchBuffer Pointer to scratch buffer address.\r
+\r
+ @retval EFI_SUCCESS Get scratch buffer successfully.\r
+ @retval EFI_UNSUPPORTED If input size is greater than the maximum supported buffer size.\r
+\r
+**/\r
+EFI_STATUS\r
+EFIAPI\r
+VariableExLibGetScratchBuffer (\r
+ IN OUT UINTN *ScratchBufferSize,\r
+ OUT VOID **ScratchBuffer\r
+ );\r
+\r
+/**\r
+ This function is to check if the remaining variable space is enough to set\r
+ all Variables from argument list successfully. The purpose of the check\r
+ is to keep the consistency of the Variables to be in variable storage.\r
+\r
+ Note: Variables are assumed to be in same storage.\r
+ The set sequence of Variables will be same with the sequence of VariableEntry from argument list,\r
+ so follow the argument sequence to check the Variables.\r
+\r
+ @param[in] Attributes Variable attributes for Variable entries.\r
+ @param ... The variable argument list with type VARIABLE_ENTRY_CONSISTENCY *.\r
+ A NULL terminates the list. The VariableSize of\r
+ VARIABLE_ENTRY_CONSISTENCY is the variable data size as input.\r
+ It will be changed to variable total size as output.\r
+\r
+ @retval TRUE Have enough variable space to set the Variables successfully.\r
+ @retval FALSE No enough variable space to set the Variables successfully.\r
+\r
+**/\r
+BOOLEAN\r
+EFIAPI\r
+VariableExLibCheckRemainingSpaceForConsistency (\r
+ IN UINT32 Attributes,\r
+ ...\r
+ );\r
+\r
+/**\r
+ Return TRUE if at OS runtime.\r
+\r
+ @retval TRUE If at OS runtime.\r
+ @retval FALSE If at boot time.\r
+\r
+**/\r
+BOOLEAN\r
+EFIAPI\r
+VariableExLibAtRuntime (\r
+ VOID\r
);\r
\r
#endif\r
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