diff options
| author | kx <kx@radix.pro> | 2024-06-04 06:43:08 +0300 |
|---|---|---|
| committer | kx <kx@radix.pro> | 2024-06-04 06:43:08 +0300 |
| commit | 7e2ccccace24636f29ddc210b94606abd4c7e42b (patch) | |
| tree | 545d43ea12671048956cafeb12303e84d601e571 /MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.h | |
| parent | 27b044605cd5f6b33a3d231576003850b3fe305b (diff) | |
| download | edk2-trunk.tar.xz | |
Renormalized end-of-lines from master@27b044605cd5f6b33a3d231576003850b3fe305btrunk
Diffstat (limited to 'MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.h')
| -rw-r--r-- | MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.h | 1690 |
1 files changed, 845 insertions, 845 deletions
diff --git a/MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.h b/MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.h index 033c0625af..37a42b1f87 100644 --- a/MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.h +++ b/MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.h @@ -1,845 +1,845 @@ -/** @file
- The internal header file includes the common header files, defines
- internal structure and functions used by Variable modules.
-
-Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>
-SPDX-License-Identifier: BSD-2-Clause-Patent
-
-**/
-
-#ifndef _VARIABLE_H_
-#define _VARIABLE_H_
-
-#include <PiDxe.h>
-#include <Protocol/VariableWrite.h>
-#include <Protocol/FaultTolerantWrite.h>
-#include <Protocol/FirmwareVolumeBlock.h>
-#include <Protocol/Variable.h>
-#include <Protocol/VariableLock.h>
-#include <Protocol/VarCheck.h>
-#include <Library/PcdLib.h>
-#include <Library/HobLib.h>
-#include <Library/UefiDriverEntryPoint.h>
-#include <Library/DxeServicesTableLib.h>
-#include <Library/UefiRuntimeLib.h>
-#include <Library/DebugLib.h>
-#include <Library/BaseMemoryLib.h>
-#include <Library/UefiBootServicesTableLib.h>
-#include <Library/UefiLib.h>
-#include <Library/BaseLib.h>
-#include <Library/SynchronizationLib.h>
-#include <Library/MemoryAllocationLib.h>
-#include <Library/AuthVariableLib.h>
-#include <Library/VarCheckLib.h>
-#include <Library/VariableFlashInfoLib.h>
-#include <Library/SafeIntLib.h>
-#include <Guid/GlobalVariable.h>
-#include <Guid/EventGroup.h>
-#include <Guid/VariableFormat.h>
-#include <Guid/SystemNvDataGuid.h>
-#include <Guid/FaultTolerantWrite.h>
-#include <Guid/VarErrorFlag.h>
-
-#include "PrivilegePolymorphic.h"
-
-#define EFI_VARIABLE_ATTRIBUTES_MASK (EFI_VARIABLE_NON_VOLATILE |\
- EFI_VARIABLE_BOOTSERVICE_ACCESS | \
- EFI_VARIABLE_RUNTIME_ACCESS | \
- EFI_VARIABLE_HARDWARE_ERROR_RECORD | \
- EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \
- EFI_VARIABLE_APPEND_WRITE)
-
-///
-/// The size of a 3 character ISO639 language code.
-///
-#define ISO_639_2_ENTRY_SIZE 3
-
-typedef enum {
- VariableStoreTypeVolatile,
- VariableStoreTypeHob,
- VariableStoreTypeNv,
- VariableStoreTypeMax
-} VARIABLE_STORE_TYPE;
-
-typedef struct {
- UINT32 PendingUpdateOffset;
- UINT32 PendingUpdateLength;
- VARIABLE_STORE_HEADER *Store;
-} VARIABLE_RUNTIME_CACHE;
-
-typedef struct {
- BOOLEAN *ReadLock;
- BOOLEAN *PendingUpdate;
- BOOLEAN *HobFlushComplete;
- VARIABLE_RUNTIME_CACHE VariableRuntimeHobCache;
- VARIABLE_RUNTIME_CACHE VariableRuntimeNvCache;
- VARIABLE_RUNTIME_CACHE VariableRuntimeVolatileCache;
-} VARIABLE_RUNTIME_CACHE_CONTEXT;
-
-typedef struct {
- VARIABLE_HEADER *CurrPtr;
- //
- // If both ADDED and IN_DELETED_TRANSITION variable are present,
- // InDeletedTransitionPtr will point to the IN_DELETED_TRANSITION one.
- // Otherwise, CurrPtr will point to the ADDED or IN_DELETED_TRANSITION one,
- // and InDeletedTransitionPtr will be NULL at the same time.
- //
- VARIABLE_HEADER *InDeletedTransitionPtr;
- VARIABLE_HEADER *EndPtr;
- VARIABLE_HEADER *StartPtr;
- BOOLEAN Volatile;
-} VARIABLE_POINTER_TRACK;
-
-typedef struct {
- EFI_PHYSICAL_ADDRESS HobVariableBase;
- EFI_PHYSICAL_ADDRESS VolatileVariableBase;
- EFI_PHYSICAL_ADDRESS NonVolatileVariableBase;
- VARIABLE_RUNTIME_CACHE_CONTEXT VariableRuntimeCacheContext;
- EFI_LOCK VariableServicesLock;
- UINT32 ReentrantState;
- BOOLEAN AuthFormat;
- BOOLEAN AuthSupport;
- BOOLEAN EmuNvMode;
-} VARIABLE_GLOBAL;
-
-typedef struct {
- VARIABLE_GLOBAL VariableGlobal;
- UINTN VolatileLastVariableOffset;
- UINTN NonVolatileLastVariableOffset;
- UINTN CommonVariableSpace;
- UINTN CommonMaxUserVariableSpace;
- UINTN CommonRuntimeVariableSpace;
- UINTN CommonVariableTotalSize;
- UINTN CommonUserVariableTotalSize;
- UINTN HwErrVariableTotalSize;
- UINTN MaxVariableSize;
- UINTN MaxAuthVariableSize;
- UINTN MaxVolatileVariableSize;
- UINTN ScratchBufferSize;
- CHAR8 *PlatformLangCodes;
- CHAR8 *LangCodes;
- CHAR8 *PlatformLang;
- CHAR8 Lang[ISO_639_2_ENTRY_SIZE + 1];
- EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *FvbInstance;
-} VARIABLE_MODULE_GLOBAL;
-
-/**
- Flush the HOB variable to flash.
-
- @param[in] VariableName Name of variable has been updated or deleted.
- @param[in] VendorGuid Guid of variable has been updated or deleted.
-
-**/
-VOID
-FlushHobVariableToFlash (
- IN CHAR16 *VariableName,
- IN EFI_GUID *VendorGuid
- );
-
-/**
- Writes a buffer to variable storage space, in the working block.
-
- This function writes a buffer to variable storage space into a firmware
- volume block device. The destination is specified by the parameter
- VariableBase. Fault Tolerant Write protocol is used for writing.
-
- @param VariableBase Base address of the variable to write.
- @param VariableBuffer Point to the variable data buffer.
-
- @retval EFI_SUCCESS The function completed successfully.
- @retval EFI_NOT_FOUND Fail to locate Fault Tolerant Write protocol.
- @retval EFI_ABORTED The function could not complete successfully.
-
-**/
-EFI_STATUS
-FtwVariableSpace (
- IN EFI_PHYSICAL_ADDRESS VariableBase,
- IN VARIABLE_STORE_HEADER *VariableBuffer
- );
-
-/**
- Finds variable in storage blocks of volatile and non-volatile storage areas.
-
- This code finds variable in storage blocks of volatile and non-volatile storage areas.
- If VariableName is an empty string, then we just return the first
- qualified variable without comparing VariableName and VendorGuid.
- If IgnoreRtCheck is TRUE, then we ignore the EFI_VARIABLE_RUNTIME_ACCESS attribute check
- at runtime when searching existing variable, only VariableName and VendorGuid are compared.
- Otherwise, variables without EFI_VARIABLE_RUNTIME_ACCESS are not visible at runtime.
-
- @param[in] VariableName Name of the variable to be found.
- @param[in] VendorGuid Vendor GUID to be found.
- @param[out] PtrTrack VARIABLE_POINTER_TRACK structure for output,
- including the range searched and the target position.
- @param[in] Global Pointer to VARIABLE_GLOBAL structure, including
- base of volatile variable storage area, base of
- NV variable storage area, and a lock.
- @param[in] IgnoreRtCheck Ignore EFI_VARIABLE_RUNTIME_ACCESS attribute
- check at runtime when searching variable.
-
- @retval EFI_INVALID_PARAMETER If VariableName is not an empty string, while
- VendorGuid is NULL.
- @retval EFI_SUCCESS Variable successfully found.
- @retval EFI_NOT_FOUND Variable not found
-
-**/
-EFI_STATUS
-FindVariable (
- IN CHAR16 *VariableName,
- IN EFI_GUID *VendorGuid,
- OUT VARIABLE_POINTER_TRACK *PtrTrack,
- IN VARIABLE_GLOBAL *Global,
- IN BOOLEAN IgnoreRtCheck
- );
-
-/**
- This function is to check if the remaining variable space is enough to set
- all Variables from argument list successfully. The purpose of the check
- is to keep the consistency of the Variables to be in variable storage.
-
- Note: Variables are assumed to be in same storage.
- The set sequence of Variables will be same with the sequence of VariableEntry from argument list,
- so follow the argument sequence to check the Variables.
-
- @param[in] Attributes Variable attributes for Variable entries.
- @param[in] Marker VA_LIST style variable argument list.
- The variable argument list with type VARIABLE_ENTRY_CONSISTENCY *.
- A NULL terminates the list. The VariableSize of
- VARIABLE_ENTRY_CONSISTENCY is the variable data size as input.
- It will be changed to variable total size as output.
-
- @retval TRUE Have enough variable space to set the Variables successfully.
- @retval FALSE No enough variable space to set the Variables successfully.
-
-**/
-BOOLEAN
-EFIAPI
-CheckRemainingSpaceForConsistencyInternal (
- IN UINT32 Attributes,
- IN VA_LIST Marker
- );
-
-/**
- Update the variable region with Variable information. If EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS is set,
- index of associated public key is needed.
-
- @param[in] VariableName Name of variable.
- @param[in] VendorGuid Guid of variable.
- @param[in] Data Variable data.
- @param[in] DataSize Size of data. 0 means delete.
- @param[in] Attributes Attributes of the variable.
- @param[in] KeyIndex Index of associated public key.
- @param[in] MonotonicCount Value of associated monotonic count.
- @param[in, out] Variable The variable information that is used to keep track of variable usage.
-
- @param[in] TimeStamp Value of associated TimeStamp.
-
- @retval EFI_SUCCESS The update operation is success.
- @retval EFI_OUT_OF_RESOURCES Variable region is full, cannot write other data into this region.
-
-**/
-EFI_STATUS
-UpdateVariable (
- IN CHAR16 *VariableName,
- IN EFI_GUID *VendorGuid,
- IN VOID *Data,
- IN UINTN DataSize,
- IN UINT32 Attributes OPTIONAL,
- IN UINT32 KeyIndex OPTIONAL,
- IN UINT64 MonotonicCount OPTIONAL,
- IN OUT VARIABLE_POINTER_TRACK *Variable,
- IN EFI_TIME *TimeStamp OPTIONAL
- );
-
-/**
- Return TRUE if ExitBootServices () has been called.
-
- @retval TRUE If ExitBootServices () has been called.
-**/
-BOOLEAN
-AtRuntime (
- VOID
- );
-
-/**
- Initializes a basic mutual exclusion lock.
-
- This function initializes a basic mutual exclusion lock to the released state
- and returns the lock. Each lock provides mutual exclusion access at its task
- priority level. Since there is no preemption or multiprocessor support in EFI,
- acquiring the lock only consists of raising to the locks TPL.
- If Lock is NULL, then ASSERT().
- If Priority is not a valid TPL value, then ASSERT().
-
- @param Lock A pointer to the lock data structure to initialize.
- @param Priority EFI TPL is associated with the lock.
-
- @return The lock.
-
-**/
-EFI_LOCK *
-InitializeLock (
- IN OUT EFI_LOCK *Lock,
- IN EFI_TPL Priority
- );
-
-/**
- Acquires lock only at boot time. Simply returns at runtime.
-
- This is a temperary function that will be removed when
- EfiAcquireLock() in UefiLib can handle the call in UEFI
- Runtimer driver in RT phase.
- It calls EfiAcquireLock() at boot time, and simply returns
- at runtime.
-
- @param Lock A pointer to the lock to acquire.
-
-**/
-VOID
-AcquireLockOnlyAtBootTime (
- IN EFI_LOCK *Lock
- );
-
-/**
- Releases lock only at boot time. Simply returns at runtime.
-
- This is a temperary function which will be removed when
- EfiReleaseLock() in UefiLib can handle the call in UEFI
- Runtimer driver in RT phase.
- It calls EfiReleaseLock() at boot time and simply returns
- at runtime.
-
- @param Lock A pointer to the lock to release.
-
-**/
-VOID
-ReleaseLockOnlyAtBootTime (
- IN EFI_LOCK *Lock
- );
-
-/**
- Retrieve the FVB protocol interface by HANDLE.
-
- @param[in] FvBlockHandle The handle of FVB protocol that provides services for
- reading, writing, and erasing the target block.
- @param[out] FvBlock The interface of FVB protocol
-
- @retval EFI_SUCCESS The interface information for the specified protocol was returned.
- @retval EFI_UNSUPPORTED The device does not support the FVB protocol.
- @retval EFI_INVALID_PARAMETER FvBlockHandle is not a valid EFI_HANDLE or FvBlock is NULL.
-
-**/
-EFI_STATUS
-GetFvbByHandle (
- IN EFI_HANDLE FvBlockHandle,
- OUT EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL **FvBlock
- );
-
-/**
- Function returns an array of handles that support the FVB protocol
- in a buffer allocated from pool.
-
- @param[out] NumberHandles The number of handles returned in Buffer.
- @param[out] Buffer A pointer to the buffer to return the requested
- array of handles that support FVB protocol.
-
- @retval EFI_SUCCESS The array of handles was returned in Buffer, and the number of
- handles in Buffer was returned in NumberHandles.
- @retval EFI_NOT_FOUND No FVB handle was found.
- @retval EFI_OUT_OF_RESOURCES There is not enough pool memory to store the matching results.
- @retval EFI_INVALID_PARAMETER NumberHandles is NULL or Buffer is NULL.
-
-**/
-EFI_STATUS
-GetFvbCountAndBuffer (
- OUT UINTN *NumberHandles,
- OUT EFI_HANDLE **Buffer
- );
-
-/**
- Initializes variable store area for non-volatile and volatile variable.
-
- @retval EFI_SUCCESS Function successfully executed.
- @retval EFI_OUT_OF_RESOURCES Fail to allocate enough memory resource.
-
-**/
-EFI_STATUS
-VariableCommonInitialize (
- VOID
- );
-
-/**
- This function reclaims variable storage if free size is below the threshold.
-
-**/
-VOID
-ReclaimForOS (
- VOID
- );
-
-/**
- Get maximum variable size, covering both non-volatile and volatile variables.
-
- @return Maximum variable size.
-
-**/
-UINTN
-GetMaxVariableSize (
- VOID
- );
-
-/**
- Initializes variable write service.
-
- @retval EFI_SUCCESS Function successfully executed.
- @retval Others Fail to initialize the variable service.
-
-**/
-EFI_STATUS
-VariableWriteServiceInitialize (
- VOID
- );
-
-/**
- Retrieve the SMM Fault Tolerent Write protocol interface.
-
- @param[out] FtwProtocol The interface of SMM Ftw protocol
-
- @retval EFI_SUCCESS The SMM SAR protocol instance was found and returned in SarProtocol.
- @retval EFI_NOT_FOUND The SMM SAR protocol instance was not found.
- @retval EFI_INVALID_PARAMETER SarProtocol is NULL.
-
-**/
-EFI_STATUS
-GetFtwProtocol (
- OUT VOID **FtwProtocol
- );
-
-/**
- Get the proper fvb handle and/or fvb protocol by the given Flash address.
-
- @param[in] Address The Flash address.
- @param[out] FvbHandle In output, if it is not NULL, it points to the proper FVB handle.
- @param[out] FvbProtocol In output, if it is not NULL, it points to the proper FVB protocol.
-
-**/
-EFI_STATUS
-GetFvbInfoByAddress (
- IN EFI_PHYSICAL_ADDRESS Address,
- OUT EFI_HANDLE *FvbHandle OPTIONAL,
- OUT EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL **FvbProtocol OPTIONAL
- );
-
-/**
-
- This code finds variable in storage blocks (Volatile or Non-Volatile).
-
- Caution: This function may receive untrusted input.
- This function may be invoked in SMM mode, and datasize and data are external input.
- This function will do basic validation, before parse the data.
-
- @param VariableName Name of Variable to be found.
- @param VendorGuid Variable vendor GUID.
- @param Attributes Attribute value of the variable found.
- @param DataSize Size of Data found. If size is less than the
- data, this value contains the required size.
- @param Data The buffer to return the contents of the variable. May be NULL
- with a zero DataSize in order to determine the size buffer needed.
-
- @retval EFI_SUCCESS The function completed successfully.
- @retval EFI_NOT_FOUND The variable was not found.
- @retval EFI_BUFFER_TOO_SMALL The DataSize is too small for the result.
- @retval EFI_INVALID_PARAMETER VariableName is NULL.
- @retval EFI_INVALID_PARAMETER VendorGuid is NULL.
- @retval EFI_INVALID_PARAMETER DataSize is NULL.
- @retval EFI_INVALID_PARAMETER The DataSize is not too small and Data is NULL.
- @retval EFI_DEVICE_ERROR The variable could not be retrieved due to a hardware error.
- @retval EFI_SECURITY_VIOLATION The variable could not be retrieved due to an authentication failure.
- @retval EFI_UNSUPPORTED After ExitBootServices() has been called, this return code may be returned
- if no variable storage is supported. The platform should describe this
- runtime service as unsupported at runtime via an EFI_RT_PROPERTIES_TABLE
- configuration table.
-
-**/
-EFI_STATUS
-EFIAPI
-VariableServiceGetVariable (
- IN CHAR16 *VariableName,
- IN EFI_GUID *VendorGuid,
- OUT UINT32 *Attributes OPTIONAL,
- IN OUT UINTN *DataSize,
- OUT VOID *Data OPTIONAL
- );
-
-/**
-
- This code Finds the Next available variable.
-
- Caution: This function may receive untrusted input.
- This function may be invoked in SMM mode. This function will do basic validation, before parse the data.
-
- @param VariableNameSize The size of the VariableName buffer. The size must be large
- enough to fit input string supplied in VariableName buffer.
- @param VariableName Pointer to variable name.
- @param VendorGuid Variable Vendor Guid.
-
- @retval EFI_SUCCESS The function completed successfully.
- @retval EFI_NOT_FOUND The next variable was not found.
- @retval EFI_BUFFER_TOO_SMALL The VariableNameSize is too small for the result.
- VariableNameSize has been updated with the size needed to complete the request.
- @retval EFI_INVALID_PARAMETER VariableNameSize is NULL.
- @retval EFI_INVALID_PARAMETER VariableName is NULL.
- @retval EFI_INVALID_PARAMETER VendorGuid is NULL.
- @retval EFI_INVALID_PARAMETER The input values of VariableName and VendorGuid are not a name and
- GUID of an existing variable.
- @retval EFI_INVALID_PARAMETER Null-terminator is not found in the first VariableNameSize bytes of
- the input VariableName buffer.
- @retval EFI_DEVICE_ERROR The variable could not be retrieved due to a hardware error.
- @retval EFI_UNSUPPORTED After ExitBootServices() has been called, this return code may be returned
- if no variable storage is supported. The platform should describe this
- runtime service as unsupported at runtime via an EFI_RT_PROPERTIES_TABLE
- configuration table.
-
-**/
-EFI_STATUS
-EFIAPI
-VariableServiceGetNextVariableName (
- IN OUT UINTN *VariableNameSize,
- IN OUT CHAR16 *VariableName,
- IN OUT EFI_GUID *VendorGuid
- );
-
-/**
-
- This code sets variable in storage blocks (Volatile or Non-Volatile).
-
- Caution: This function may receive untrusted input.
- This function may be invoked in SMM mode, and datasize and data are external input.
- This function will do basic validation, before parse the data.
- This function will parse the authentication carefully to avoid security issues, like
- buffer overflow, integer overflow.
- This function will check attribute carefully to avoid authentication bypass.
-
- @param VariableName Name of Variable to be found.
- @param VendorGuid Variable vendor GUID.
- @param Attributes Attribute value of the variable found
- @param DataSize Size of Data found. If size is less than the
- data, this value contains the required size.
- @param Data Data pointer.
-
- @retval EFI_SUCCESS The function completed successfully.
- @retval EFI_NOT_FOUND The variable was not found.
- @retval EFI_BUFFER_TOO_SMALL The DataSize is too small for the result.
- @retval EFI_INVALID_PARAMETER VariableName is NULL.
- @retval EFI_INVALID_PARAMETER VendorGuid is NULL.
- @retval EFI_INVALID_PARAMETER DataSize is NULL.
- @retval EFI_INVALID_PARAMETER The DataSize is not too small and Data is NULL.
- @retval EFI_DEVICE_ERROR The variable could not be retrieved due to a hardware error.
- @retval EFI_SECURITY_VIOLATION The variable could not be retrieved due to an authentication failure.
- @retval EFI_UNSUPPORTED After ExitBootServices() has been called, this return code may be returned
- if no variable storage is supported. The platform should describe this
- runtime service as unsupported at runtime via an EFI_RT_PROPERTIES_TABLE
- configuration table.
-
-**/
-EFI_STATUS
-EFIAPI
-VariableServiceSetVariable (
- IN CHAR16 *VariableName,
- IN EFI_GUID *VendorGuid,
- IN UINT32 Attributes,
- IN UINTN DataSize,
- IN VOID *Data
- );
-
-/**
-
- This code returns information about the EFI variables.
-
- Caution: This function may receive untrusted input.
- This function may be invoked in SMM mode. This function will do basic validation, before parse the data.
-
- @param Attributes Attributes bitmask to specify the type of variables
- on which to return information.
- @param MaximumVariableStorageSize Pointer to the maximum size of the storage space available
- for the EFI variables associated with the attributes specified.
- @param RemainingVariableStorageSize Pointer to the remaining size of the storage space available
- for EFI variables associated with the attributes specified.
- @param MaximumVariableSize Pointer to the maximum size of an individual EFI variables
- associated with the attributes specified.
-
- @return EFI_SUCCESS Query successfully.
-
-**/
-EFI_STATUS
-EFIAPI
-VariableServiceQueryVariableInfoInternal (
- IN UINT32 Attributes,
- OUT UINT64 *MaximumVariableStorageSize,
- OUT UINT64 *RemainingVariableStorageSize,
- OUT UINT64 *MaximumVariableSize
- );
-
-/**
-
- This code returns information about the EFI variables.
-
- Caution: This function may receive untrusted input.
- This function may be invoked in SMM mode. This function will do basic validation, before parse the data.
-
- @param Attributes Attributes bitmask to specify the type of variables
- on which to return information.
- @param MaximumVariableStorageSize Pointer to the maximum size of the storage space available
- for the EFI variables associated with the attributes specified.
- @param RemainingVariableStorageSize Pointer to the remaining size of the storage space available
- for EFI variables associated with the attributes specified.
- @param MaximumVariableSize Pointer to the maximum size of an individual EFI variables
- associated with the attributes specified.
-
- @return EFI_INVALID_PARAMETER An invalid combination of attribute bits was supplied.
- @return EFI_SUCCESS Query successfully.
- @return EFI_UNSUPPORTED The attribute is not supported on this platform.
-
-**/
-EFI_STATUS
-EFIAPI
-VariableServiceQueryVariableInfo (
- IN UINT32 Attributes,
- OUT UINT64 *MaximumVariableStorageSize,
- OUT UINT64 *RemainingVariableStorageSize,
- OUT UINT64 *MaximumVariableSize
- );
-
-/**
- Mark a variable that will become read-only after leaving the DXE phase of execution.
-
- @param[in] This The VARIABLE_LOCK_PROTOCOL instance.
- @param[in] VariableName A pointer to the variable name that will be made read-only subsequently.
- @param[in] VendorGuid A pointer to the vendor GUID that will be made read-only subsequently.
-
- @retval EFI_SUCCESS The variable specified by the VariableName and the VendorGuid was marked
- as pending to be read-only.
- @retval EFI_INVALID_PARAMETER VariableName or VendorGuid is NULL.
- Or VariableName is an empty string.
- @retval EFI_ACCESS_DENIED EFI_END_OF_DXE_EVENT_GROUP_GUID or EFI_EVENT_GROUP_READY_TO_BOOT has
- already been signaled.
- @retval EFI_OUT_OF_RESOURCES There is not enough resource to hold the lock request.
-**/
-EFI_STATUS
-EFIAPI
-VariableLockRequestToLock (
- IN CONST EDKII_VARIABLE_LOCK_PROTOCOL *This,
- IN CHAR16 *VariableName,
- IN EFI_GUID *VendorGuid
- );
-
-/**
- Register SetVariable check handler.
-
- @param[in] Handler Pointer to check handler.
-
- @retval EFI_SUCCESS The SetVariable check handler was registered successfully.
- @retval EFI_INVALID_PARAMETER Handler is NULL.
- @retval EFI_ACCESS_DENIED EFI_END_OF_DXE_EVENT_GROUP_GUID or EFI_EVENT_GROUP_READY_TO_BOOT has
- already been signaled.
- @retval EFI_OUT_OF_RESOURCES There is not enough resource for the SetVariable check handler register request.
- @retval EFI_UNSUPPORTED This interface is not implemented.
- For example, it is unsupported in VarCheck protocol if both VarCheck and SmmVarCheck protocols are present.
-
-**/
-EFI_STATUS
-EFIAPI
-VarCheckRegisterSetVariableCheckHandler (
- IN VAR_CHECK_SET_VARIABLE_CHECK_HANDLER Handler
- );
-
-/**
- Variable property set.
-
- @param[in] Name Pointer to the variable name.
- @param[in] Guid Pointer to the vendor GUID.
- @param[in] VariableProperty Pointer to the input variable property.
-
- @retval EFI_SUCCESS The property of variable specified by the Name and Guid was set successfully.
- @retval EFI_INVALID_PARAMETER Name, Guid or VariableProperty is NULL, or Name is an empty string,
- or the fields of VariableProperty are not valid.
- @retval EFI_ACCESS_DENIED EFI_END_OF_DXE_EVENT_GROUP_GUID or EFI_EVENT_GROUP_READY_TO_BOOT has
- already been signaled.
- @retval EFI_OUT_OF_RESOURCES There is not enough resource for the variable property set request.
-
-**/
-EFI_STATUS
-EFIAPI
-VarCheckVariablePropertySet (
- IN CHAR16 *Name,
- IN EFI_GUID *Guid,
- IN VAR_CHECK_VARIABLE_PROPERTY *VariableProperty
- );
-
-/**
- Variable property get.
-
- @param[in] Name Pointer to the variable name.
- @param[in] Guid Pointer to the vendor GUID.
- @param[out] VariableProperty Pointer to the output variable property.
-
- @retval EFI_SUCCESS The property of variable specified by the Name and Guid was got successfully.
- @retval EFI_INVALID_PARAMETER Name, Guid or VariableProperty is NULL, or Name is an empty string.
- @retval EFI_NOT_FOUND The property of variable specified by the Name and Guid was not found.
-
-**/
-EFI_STATUS
-EFIAPI
-VarCheckVariablePropertyGet (
- IN CHAR16 *Name,
- IN EFI_GUID *Guid,
- OUT VAR_CHECK_VARIABLE_PROPERTY *VariableProperty
- );
-
-/**
- Initialize variable quota.
-
-**/
-VOID
-InitializeVariableQuota (
- VOID
- );
-
-extern VARIABLE_MODULE_GLOBAL *mVariableModuleGlobal;
-extern EFI_FIRMWARE_VOLUME_HEADER *mNvFvHeaderCache;
-extern VARIABLE_STORE_HEADER *mNvVariableCache;
-extern VARIABLE_INFO_ENTRY *gVariableInfo;
-extern BOOLEAN mEndOfDxe;
-extern VAR_CHECK_REQUEST_SOURCE mRequestSource;
-
-extern AUTH_VAR_LIB_CONTEXT_OUT mAuthContextOut;
-
-/**
- Finds variable in storage blocks of volatile and non-volatile storage areas.
-
- This code finds variable in storage blocks of volatile and non-volatile storage areas.
- If VariableName is an empty string, then we just return the first
- qualified variable without comparing VariableName and VendorGuid.
-
- @param[in] VariableName Name of the variable to be found.
- @param[in] VendorGuid Variable vendor GUID to be found.
- @param[out] AuthVariableInfo Pointer to AUTH_VARIABLE_INFO structure for
- output of the variable found.
-
- @retval EFI_INVALID_PARAMETER If VariableName is not an empty string,
- while VendorGuid is NULL.
- @retval EFI_SUCCESS Variable successfully found.
- @retval EFI_NOT_FOUND Variable not found
-
-**/
-EFI_STATUS
-EFIAPI
-VariableExLibFindVariable (
- IN CHAR16 *VariableName,
- IN EFI_GUID *VendorGuid,
- OUT AUTH_VARIABLE_INFO *AuthVariableInfo
- );
-
-/**
- Finds next variable in storage blocks of volatile and non-volatile storage areas.
-
- This code finds next variable in storage blocks of volatile and non-volatile storage areas.
- If VariableName is an empty string, then we just return the first
- qualified variable without comparing VariableName and VendorGuid.
-
- @param[in] VariableName Name of the variable to be found.
- @param[in] VendorGuid Variable vendor GUID to be found.
- @param[out] AuthVariableInfo Pointer to AUTH_VARIABLE_INFO structure for
- output of the next variable.
-
- @retval EFI_INVALID_PARAMETER If VariableName is not an empty string,
- while VendorGuid is NULL.
- @retval EFI_SUCCESS Variable successfully found.
- @retval EFI_NOT_FOUND Variable not found
-
-**/
-EFI_STATUS
-EFIAPI
-VariableExLibFindNextVariable (
- IN CHAR16 *VariableName,
- IN EFI_GUID *VendorGuid,
- OUT AUTH_VARIABLE_INFO *AuthVariableInfo
- );
-
-/**
- Update the variable region with Variable information.
-
- @param[in] AuthVariableInfo Pointer AUTH_VARIABLE_INFO structure for
- input of the variable.
-
- @retval EFI_SUCCESS The update operation is success.
- @retval EFI_INVALID_PARAMETER Invalid parameter.
- @retval EFI_WRITE_PROTECTED Variable is write-protected.
- @retval EFI_OUT_OF_RESOURCES There is not enough resource.
-
-**/
-EFI_STATUS
-EFIAPI
-VariableExLibUpdateVariable (
- IN AUTH_VARIABLE_INFO *AuthVariableInfo
- );
-
-/**
- Get scratch buffer.
-
- @param[in, out] ScratchBufferSize Scratch buffer size. If input size is greater than
- the maximum supported buffer size, this value contains
- the maximum supported buffer size as output.
- @param[out] ScratchBuffer Pointer to scratch buffer address.
-
- @retval EFI_SUCCESS Get scratch buffer successfully.
- @retval EFI_UNSUPPORTED If input size is greater than the maximum supported buffer size.
-
-**/
-EFI_STATUS
-EFIAPI
-VariableExLibGetScratchBuffer (
- IN OUT UINTN *ScratchBufferSize,
- OUT VOID **ScratchBuffer
- );
-
-/**
- This function is to check if the remaining variable space is enough to set
- all Variables from argument list successfully. The purpose of the check
- is to keep the consistency of the Variables to be in variable storage.
-
- Note: Variables are assumed to be in same storage.
- The set sequence of Variables will be same with the sequence of VariableEntry from argument list,
- so follow the argument sequence to check the Variables.
-
- @param[in] Attributes Variable attributes for Variable entries.
- @param ... The variable argument list with type VARIABLE_ENTRY_CONSISTENCY *.
- A NULL terminates the list. The VariableSize of
- VARIABLE_ENTRY_CONSISTENCY is the variable data size as input.
- It will be changed to variable total size as output.
-
- @retval TRUE Have enough variable space to set the Variables successfully.
- @retval FALSE No enough variable space to set the Variables successfully.
-
-**/
-BOOLEAN
-EFIAPI
-VariableExLibCheckRemainingSpaceForConsistency (
- IN UINT32 Attributes,
- ...
- );
-
-/**
- Return TRUE if at OS runtime.
-
- @retval TRUE If at OS runtime.
- @retval FALSE If at boot time.
-
-**/
-BOOLEAN
-EFIAPI
-VariableExLibAtRuntime (
- VOID
- );
-
-#endif
+/** @file + The internal header file includes the common header files, defines + internal structure and functions used by Variable modules. + +Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR> +SPDX-License-Identifier: BSD-2-Clause-Patent + +**/ + +#ifndef _VARIABLE_H_ +#define _VARIABLE_H_ + +#include <PiDxe.h> +#include <Protocol/VariableWrite.h> +#include <Protocol/FaultTolerantWrite.h> +#include <Protocol/FirmwareVolumeBlock.h> +#include <Protocol/Variable.h> +#include <Protocol/VariableLock.h> +#include <Protocol/VarCheck.h> +#include <Library/PcdLib.h> +#include <Library/HobLib.h> +#include <Library/UefiDriverEntryPoint.h> +#include <Library/DxeServicesTableLib.h> +#include <Library/UefiRuntimeLib.h> +#include <Library/DebugLib.h> +#include <Library/BaseMemoryLib.h> +#include <Library/UefiBootServicesTableLib.h> +#include <Library/UefiLib.h> +#include <Library/BaseLib.h> +#include <Library/SynchronizationLib.h> +#include <Library/MemoryAllocationLib.h> +#include <Library/AuthVariableLib.h> +#include <Library/VarCheckLib.h> +#include <Library/VariableFlashInfoLib.h> +#include <Library/SafeIntLib.h> +#include <Guid/GlobalVariable.h> +#include <Guid/EventGroup.h> +#include <Guid/VariableFormat.h> +#include <Guid/SystemNvDataGuid.h> +#include <Guid/FaultTolerantWrite.h> +#include <Guid/VarErrorFlag.h> + +#include "PrivilegePolymorphic.h" + +#define EFI_VARIABLE_ATTRIBUTES_MASK (EFI_VARIABLE_NON_VOLATILE |\ + EFI_VARIABLE_BOOTSERVICE_ACCESS | \ + EFI_VARIABLE_RUNTIME_ACCESS | \ + EFI_VARIABLE_HARDWARE_ERROR_RECORD | \ + EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \ + EFI_VARIABLE_APPEND_WRITE) + +/// +/// The size of a 3 character ISO639 language code. +/// +#define ISO_639_2_ENTRY_SIZE 3 + +typedef enum { + VariableStoreTypeVolatile, + VariableStoreTypeHob, + VariableStoreTypeNv, + VariableStoreTypeMax +} VARIABLE_STORE_TYPE; + +typedef struct { + UINT32 PendingUpdateOffset; + UINT32 PendingUpdateLength; + VARIABLE_STORE_HEADER *Store; +} VARIABLE_RUNTIME_CACHE; + +typedef struct { + BOOLEAN *ReadLock; + BOOLEAN *PendingUpdate; + BOOLEAN *HobFlushComplete; + VARIABLE_RUNTIME_CACHE VariableRuntimeHobCache; + VARIABLE_RUNTIME_CACHE VariableRuntimeNvCache; + VARIABLE_RUNTIME_CACHE VariableRuntimeVolatileCache; +} VARIABLE_RUNTIME_CACHE_CONTEXT; + +typedef struct { + VARIABLE_HEADER *CurrPtr; + // + // If both ADDED and IN_DELETED_TRANSITION variable are present, + // InDeletedTransitionPtr will point to the IN_DELETED_TRANSITION one. + // Otherwise, CurrPtr will point to the ADDED or IN_DELETED_TRANSITION one, + // and InDeletedTransitionPtr will be NULL at the same time. + // + VARIABLE_HEADER *InDeletedTransitionPtr; + VARIABLE_HEADER *EndPtr; + VARIABLE_HEADER *StartPtr; + BOOLEAN Volatile; +} VARIABLE_POINTER_TRACK; + +typedef struct { + EFI_PHYSICAL_ADDRESS HobVariableBase; + EFI_PHYSICAL_ADDRESS VolatileVariableBase; + EFI_PHYSICAL_ADDRESS NonVolatileVariableBase; + VARIABLE_RUNTIME_CACHE_CONTEXT VariableRuntimeCacheContext; + EFI_LOCK VariableServicesLock; + UINT32 ReentrantState; + BOOLEAN AuthFormat; + BOOLEAN AuthSupport; + BOOLEAN EmuNvMode; +} VARIABLE_GLOBAL; + +typedef struct { + VARIABLE_GLOBAL VariableGlobal; + UINTN VolatileLastVariableOffset; + UINTN NonVolatileLastVariableOffset; + UINTN CommonVariableSpace; + UINTN CommonMaxUserVariableSpace; + UINTN CommonRuntimeVariableSpace; + UINTN CommonVariableTotalSize; + UINTN CommonUserVariableTotalSize; + UINTN HwErrVariableTotalSize; + UINTN MaxVariableSize; + UINTN MaxAuthVariableSize; + UINTN MaxVolatileVariableSize; + UINTN ScratchBufferSize; + CHAR8 *PlatformLangCodes; + CHAR8 *LangCodes; + CHAR8 *PlatformLang; + CHAR8 Lang[ISO_639_2_ENTRY_SIZE + 1]; + EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *FvbInstance; +} VARIABLE_MODULE_GLOBAL; + +/** + Flush the HOB variable to flash. + + @param[in] VariableName Name of variable has been updated or deleted. + @param[in] VendorGuid Guid of variable has been updated or deleted. + +**/ +VOID +FlushHobVariableToFlash ( + IN CHAR16 *VariableName, + IN EFI_GUID *VendorGuid + ); + +/** + Writes a buffer to variable storage space, in the working block. + + This function writes a buffer to variable storage space into a firmware + volume block device. The destination is specified by the parameter + VariableBase. Fault Tolerant Write protocol is used for writing. + + @param VariableBase Base address of the variable to write. + @param VariableBuffer Point to the variable data buffer. + + @retval EFI_SUCCESS The function completed successfully. + @retval EFI_NOT_FOUND Fail to locate Fault Tolerant Write protocol. + @retval EFI_ABORTED The function could not complete successfully. + +**/ +EFI_STATUS +FtwVariableSpace ( + IN EFI_PHYSICAL_ADDRESS VariableBase, + IN VARIABLE_STORE_HEADER *VariableBuffer + ); + +/** + Finds variable in storage blocks of volatile and non-volatile storage areas. + + This code finds variable in storage blocks of volatile and non-volatile storage areas. + If VariableName is an empty string, then we just return the first + qualified variable without comparing VariableName and VendorGuid. + If IgnoreRtCheck is TRUE, then we ignore the EFI_VARIABLE_RUNTIME_ACCESS attribute check + at runtime when searching existing variable, only VariableName and VendorGuid are compared. + Otherwise, variables without EFI_VARIABLE_RUNTIME_ACCESS are not visible at runtime. + + @param[in] VariableName Name of the variable to be found. + @param[in] VendorGuid Vendor GUID to be found. + @param[out] PtrTrack VARIABLE_POINTER_TRACK structure for output, + including the range searched and the target position. + @param[in] Global Pointer to VARIABLE_GLOBAL structure, including + base of volatile variable storage area, base of + NV variable storage area, and a lock. + @param[in] IgnoreRtCheck Ignore EFI_VARIABLE_RUNTIME_ACCESS attribute + check at runtime when searching variable. + + @retval EFI_INVALID_PARAMETER If VariableName is not an empty string, while + VendorGuid is NULL. + @retval EFI_SUCCESS Variable successfully found. + @retval EFI_NOT_FOUND Variable not found + +**/ +EFI_STATUS +FindVariable ( + IN CHAR16 *VariableName, + IN EFI_GUID *VendorGuid, + OUT VARIABLE_POINTER_TRACK *PtrTrack, + IN VARIABLE_GLOBAL *Global, + IN BOOLEAN IgnoreRtCheck + ); + +/** + This function is to check if the remaining variable space is enough to set + all Variables from argument list successfully. The purpose of the check + is to keep the consistency of the Variables to be in variable storage. + + Note: Variables are assumed to be in same storage. + The set sequence of Variables will be same with the sequence of VariableEntry from argument list, + so follow the argument sequence to check the Variables. + + @param[in] Attributes Variable attributes for Variable entries. + @param[in] Marker VA_LIST style variable argument list. + The variable argument list with type VARIABLE_ENTRY_CONSISTENCY *. + A NULL terminates the list. The VariableSize of + VARIABLE_ENTRY_CONSISTENCY is the variable data size as input. + It will be changed to variable total size as output. + + @retval TRUE Have enough variable space to set the Variables successfully. + @retval FALSE No enough variable space to set the Variables successfully. + +**/ +BOOLEAN +EFIAPI +CheckRemainingSpaceForConsistencyInternal ( + IN UINT32 Attributes, + IN VA_LIST Marker + ); + +/** + Update the variable region with Variable information. If EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS is set, + index of associated public key is needed. + + @param[in] VariableName Name of variable. + @param[in] VendorGuid Guid of variable. + @param[in] Data Variable data. + @param[in] DataSize Size of data. 0 means delete. + @param[in] Attributes Attributes of the variable. + @param[in] KeyIndex Index of associated public key. + @param[in] MonotonicCount Value of associated monotonic count. + @param[in, out] Variable The variable information that is used to keep track of variable usage. + + @param[in] TimeStamp Value of associated TimeStamp. + + @retval EFI_SUCCESS The update operation is success. + @retval EFI_OUT_OF_RESOURCES Variable region is full, cannot write other data into this region. + +**/ +EFI_STATUS +UpdateVariable ( + IN CHAR16 *VariableName, + IN EFI_GUID *VendorGuid, + IN VOID *Data, + IN UINTN DataSize, + IN UINT32 Attributes OPTIONAL, + IN UINT32 KeyIndex OPTIONAL, + IN UINT64 MonotonicCount OPTIONAL, + IN OUT VARIABLE_POINTER_TRACK *Variable, + IN EFI_TIME *TimeStamp OPTIONAL + ); + +/** + Return TRUE if ExitBootServices () has been called. + + @retval TRUE If ExitBootServices () has been called. +**/ +BOOLEAN +AtRuntime ( + VOID + ); + +/** + Initializes a basic mutual exclusion lock. + + This function initializes a basic mutual exclusion lock to the released state + and returns the lock. Each lock provides mutual exclusion access at its task + priority level. Since there is no preemption or multiprocessor support in EFI, + acquiring the lock only consists of raising to the locks TPL. + If Lock is NULL, then ASSERT(). + If Priority is not a valid TPL value, then ASSERT(). + + @param Lock A pointer to the lock data structure to initialize. + @param Priority EFI TPL is associated with the lock. + + @return The lock. + +**/ +EFI_LOCK * +InitializeLock ( + IN OUT EFI_LOCK *Lock, + IN EFI_TPL Priority + ); + +/** + Acquires lock only at boot time. Simply returns at runtime. + + This is a temperary function that will be removed when + EfiAcquireLock() in UefiLib can handle the call in UEFI + Runtimer driver in RT phase. + It calls EfiAcquireLock() at boot time, and simply returns + at runtime. + + @param Lock A pointer to the lock to acquire. + +**/ +VOID +AcquireLockOnlyAtBootTime ( + IN EFI_LOCK *Lock + ); + +/** + Releases lock only at boot time. Simply returns at runtime. + + This is a temperary function which will be removed when + EfiReleaseLock() in UefiLib can handle the call in UEFI + Runtimer driver in RT phase. + It calls EfiReleaseLock() at boot time and simply returns + at runtime. + + @param Lock A pointer to the lock to release. + +**/ +VOID +ReleaseLockOnlyAtBootTime ( + IN EFI_LOCK *Lock + ); + +/** + Retrieve the FVB protocol interface by HANDLE. + + @param[in] FvBlockHandle The handle of FVB protocol that provides services for + reading, writing, and erasing the target block. + @param[out] FvBlock The interface of FVB protocol + + @retval EFI_SUCCESS The interface information for the specified protocol was returned. + @retval EFI_UNSUPPORTED The device does not support the FVB protocol. + @retval EFI_INVALID_PARAMETER FvBlockHandle is not a valid EFI_HANDLE or FvBlock is NULL. + +**/ +EFI_STATUS +GetFvbByHandle ( + IN EFI_HANDLE FvBlockHandle, + OUT EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL **FvBlock + ); + +/** + Function returns an array of handles that support the FVB protocol + in a buffer allocated from pool. + + @param[out] NumberHandles The number of handles returned in Buffer. + @param[out] Buffer A pointer to the buffer to return the requested + array of handles that support FVB protocol. + + @retval EFI_SUCCESS The array of handles was returned in Buffer, and the number of + handles in Buffer was returned in NumberHandles. + @retval EFI_NOT_FOUND No FVB handle was found. + @retval EFI_OUT_OF_RESOURCES There is not enough pool memory to store the matching results. + @retval EFI_INVALID_PARAMETER NumberHandles is NULL or Buffer is NULL. + +**/ +EFI_STATUS +GetFvbCountAndBuffer ( + OUT UINTN *NumberHandles, + OUT EFI_HANDLE **Buffer + ); + +/** + Initializes variable store area for non-volatile and volatile variable. + + @retval EFI_SUCCESS Function successfully executed. + @retval EFI_OUT_OF_RESOURCES Fail to allocate enough memory resource. + +**/ +EFI_STATUS +VariableCommonInitialize ( + VOID + ); + +/** + This function reclaims variable storage if free size is below the threshold. + +**/ +VOID +ReclaimForOS ( + VOID + ); + +/** + Get maximum variable size, covering both non-volatile and volatile variables. + + @return Maximum variable size. + +**/ +UINTN +GetMaxVariableSize ( + VOID + ); + +/** + Initializes variable write service. + + @retval EFI_SUCCESS Function successfully executed. + @retval Others Fail to initialize the variable service. + +**/ +EFI_STATUS +VariableWriteServiceInitialize ( + VOID + ); + +/** + Retrieve the SMM Fault Tolerent Write protocol interface. + + @param[out] FtwProtocol The interface of SMM Ftw protocol + + @retval EFI_SUCCESS The SMM SAR protocol instance was found and returned in SarProtocol. + @retval EFI_NOT_FOUND The SMM SAR protocol instance was not found. + @retval EFI_INVALID_PARAMETER SarProtocol is NULL. + +**/ +EFI_STATUS +GetFtwProtocol ( + OUT VOID **FtwProtocol + ); + +/** + Get the proper fvb handle and/or fvb protocol by the given Flash address. + + @param[in] Address The Flash address. + @param[out] FvbHandle In output, if it is not NULL, it points to the proper FVB handle. + @param[out] FvbProtocol In output, if it is not NULL, it points to the proper FVB protocol. + +**/ +EFI_STATUS +GetFvbInfoByAddress ( + IN EFI_PHYSICAL_ADDRESS Address, + OUT EFI_HANDLE *FvbHandle OPTIONAL, + OUT EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL **FvbProtocol OPTIONAL + ); + +/** + + This code finds variable in storage blocks (Volatile or Non-Volatile). + + Caution: This function may receive untrusted input. + This function may be invoked in SMM mode, and datasize and data are external input. + This function will do basic validation, before parse the data. + + @param VariableName Name of Variable to be found. + @param VendorGuid Variable vendor GUID. + @param Attributes Attribute value of the variable found. + @param DataSize Size of Data found. If size is less than the + data, this value contains the required size. + @param Data The buffer to return the contents of the variable. May be NULL + with a zero DataSize in order to determine the size buffer needed. + + @retval EFI_SUCCESS The function completed successfully. + @retval EFI_NOT_FOUND The variable was not found. + @retval EFI_BUFFER_TOO_SMALL The DataSize is too small for the result. + @retval EFI_INVALID_PARAMETER VariableName is NULL. + @retval EFI_INVALID_PARAMETER VendorGuid is NULL. + @retval EFI_INVALID_PARAMETER DataSize is NULL. + @retval EFI_INVALID_PARAMETER The DataSize is not too small and Data is NULL. + @retval EFI_DEVICE_ERROR The variable could not be retrieved due to a hardware error. + @retval EFI_SECURITY_VIOLATION The variable could not be retrieved due to an authentication failure. + @retval EFI_UNSUPPORTED After ExitBootServices() has been called, this return code may be returned + if no variable storage is supported. The platform should describe this + runtime service as unsupported at runtime via an EFI_RT_PROPERTIES_TABLE + configuration table. + +**/ +EFI_STATUS +EFIAPI +VariableServiceGetVariable ( + IN CHAR16 *VariableName, + IN EFI_GUID *VendorGuid, + OUT UINT32 *Attributes OPTIONAL, + IN OUT UINTN *DataSize, + OUT VOID *Data OPTIONAL + ); + +/** + + This code Finds the Next available variable. + + Caution: This function may receive untrusted input. + This function may be invoked in SMM mode. This function will do basic validation, before parse the data. + + @param VariableNameSize The size of the VariableName buffer. The size must be large + enough to fit input string supplied in VariableName buffer. + @param VariableName Pointer to variable name. + @param VendorGuid Variable Vendor Guid. + + @retval EFI_SUCCESS The function completed successfully. + @retval EFI_NOT_FOUND The next variable was not found. + @retval EFI_BUFFER_TOO_SMALL The VariableNameSize is too small for the result. + VariableNameSize has been updated with the size needed to complete the request. + @retval EFI_INVALID_PARAMETER VariableNameSize is NULL. + @retval EFI_INVALID_PARAMETER VariableName is NULL. + @retval EFI_INVALID_PARAMETER VendorGuid is NULL. + @retval EFI_INVALID_PARAMETER The input values of VariableName and VendorGuid are not a name and + GUID of an existing variable. + @retval EFI_INVALID_PARAMETER Null-terminator is not found in the first VariableNameSize bytes of + the input VariableName buffer. + @retval EFI_DEVICE_ERROR The variable could not be retrieved due to a hardware error. + @retval EFI_UNSUPPORTED After ExitBootServices() has been called, this return code may be returned + if no variable storage is supported. The platform should describe this + runtime service as unsupported at runtime via an EFI_RT_PROPERTIES_TABLE + configuration table. + +**/ +EFI_STATUS +EFIAPI +VariableServiceGetNextVariableName ( + IN OUT UINTN *VariableNameSize, + IN OUT CHAR16 *VariableName, + IN OUT EFI_GUID *VendorGuid + ); + +/** + + This code sets variable in storage blocks (Volatile or Non-Volatile). + + Caution: This function may receive untrusted input. + This function may be invoked in SMM mode, and datasize and data are external input. + This function will do basic validation, before parse the data. + This function will parse the authentication carefully to avoid security issues, like + buffer overflow, integer overflow. + This function will check attribute carefully to avoid authentication bypass. + + @param VariableName Name of Variable to be found. + @param VendorGuid Variable vendor GUID. + @param Attributes Attribute value of the variable found + @param DataSize Size of Data found. If size is less than the + data, this value contains the required size. + @param Data Data pointer. + + @retval EFI_SUCCESS The function completed successfully. + @retval EFI_NOT_FOUND The variable was not found. + @retval EFI_BUFFER_TOO_SMALL The DataSize is too small for the result. + @retval EFI_INVALID_PARAMETER VariableName is NULL. + @retval EFI_INVALID_PARAMETER VendorGuid is NULL. + @retval EFI_INVALID_PARAMETER DataSize is NULL. + @retval EFI_INVALID_PARAMETER The DataSize is not too small and Data is NULL. + @retval EFI_DEVICE_ERROR The variable could not be retrieved due to a hardware error. + @retval EFI_SECURITY_VIOLATION The variable could not be retrieved due to an authentication failure. + @retval EFI_UNSUPPORTED After ExitBootServices() has been called, this return code may be returned + if no variable storage is supported. The platform should describe this + runtime service as unsupported at runtime via an EFI_RT_PROPERTIES_TABLE + configuration table. + +**/ +EFI_STATUS +EFIAPI +VariableServiceSetVariable ( + IN CHAR16 *VariableName, + IN EFI_GUID *VendorGuid, + IN UINT32 Attributes, + IN UINTN DataSize, + IN VOID *Data + ); + +/** + + This code returns information about the EFI variables. + + Caution: This function may receive untrusted input. + This function may be invoked in SMM mode. This function will do basic validation, before parse the data. + + @param Attributes Attributes bitmask to specify the type of variables + on which to return information. + @param MaximumVariableStorageSize Pointer to the maximum size of the storage space available + for the EFI variables associated with the attributes specified. + @param RemainingVariableStorageSize Pointer to the remaining size of the storage space available + for EFI variables associated with the attributes specified. + @param MaximumVariableSize Pointer to the maximum size of an individual EFI variables + associated with the attributes specified. + + @return EFI_SUCCESS Query successfully. + +**/ +EFI_STATUS +EFIAPI +VariableServiceQueryVariableInfoInternal ( + IN UINT32 Attributes, + OUT UINT64 *MaximumVariableStorageSize, + OUT UINT64 *RemainingVariableStorageSize, + OUT UINT64 *MaximumVariableSize + ); + +/** + + This code returns information about the EFI variables. + + Caution: This function may receive untrusted input. + This function may be invoked in SMM mode. This function will do basic validation, before parse the data. + + @param Attributes Attributes bitmask to specify the type of variables + on which to return information. + @param MaximumVariableStorageSize Pointer to the maximum size of the storage space available + for the EFI variables associated with the attributes specified. + @param RemainingVariableStorageSize Pointer to the remaining size of the storage space available + for EFI variables associated with the attributes specified. + @param MaximumVariableSize Pointer to the maximum size of an individual EFI variables + associated with the attributes specified. + + @return EFI_INVALID_PARAMETER An invalid combination of attribute bits was supplied. + @return EFI_SUCCESS Query successfully. + @return EFI_UNSUPPORTED The attribute is not supported on this platform. + +**/ +EFI_STATUS +EFIAPI +VariableServiceQueryVariableInfo ( + IN UINT32 Attributes, + OUT UINT64 *MaximumVariableStorageSize, + OUT UINT64 *RemainingVariableStorageSize, + OUT UINT64 *MaximumVariableSize + ); + +/** + Mark a variable that will become read-only after leaving the DXE phase of execution. + + @param[in] This The VARIABLE_LOCK_PROTOCOL instance. + @param[in] VariableName A pointer to the variable name that will be made read-only subsequently. + @param[in] VendorGuid A pointer to the vendor GUID that will be made read-only subsequently. + + @retval EFI_SUCCESS The variable specified by the VariableName and the VendorGuid was marked + as pending to be read-only. + @retval EFI_INVALID_PARAMETER VariableName or VendorGuid is NULL. + Or VariableName is an empty string. + @retval EFI_ACCESS_DENIED EFI_END_OF_DXE_EVENT_GROUP_GUID or EFI_EVENT_GROUP_READY_TO_BOOT has + already been signaled. + @retval EFI_OUT_OF_RESOURCES There is not enough resource to hold the lock request. +**/ +EFI_STATUS +EFIAPI +VariableLockRequestToLock ( + IN CONST EDKII_VARIABLE_LOCK_PROTOCOL *This, + IN CHAR16 *VariableName, + IN EFI_GUID *VendorGuid + ); + +/** + Register SetVariable check handler. + + @param[in] Handler Pointer to check handler. + + @retval EFI_SUCCESS The SetVariable check handler was registered successfully. + @retval EFI_INVALID_PARAMETER Handler is NULL. + @retval EFI_ACCESS_DENIED EFI_END_OF_DXE_EVENT_GROUP_GUID or EFI_EVENT_GROUP_READY_TO_BOOT has + already been signaled. + @retval EFI_OUT_OF_RESOURCES There is not enough resource for the SetVariable check handler register request. + @retval EFI_UNSUPPORTED This interface is not implemented. + For example, it is unsupported in VarCheck protocol if both VarCheck and SmmVarCheck protocols are present. + +**/ +EFI_STATUS +EFIAPI +VarCheckRegisterSetVariableCheckHandler ( + IN VAR_CHECK_SET_VARIABLE_CHECK_HANDLER Handler + ); + +/** + Variable property set. + + @param[in] Name Pointer to the variable name. + @param[in] Guid Pointer to the vendor GUID. + @param[in] VariableProperty Pointer to the input variable property. + + @retval EFI_SUCCESS The property of variable specified by the Name and Guid was set successfully. + @retval EFI_INVALID_PARAMETER Name, Guid or VariableProperty is NULL, or Name is an empty string, + or the fields of VariableProperty are not valid. + @retval EFI_ACCESS_DENIED EFI_END_OF_DXE_EVENT_GROUP_GUID or EFI_EVENT_GROUP_READY_TO_BOOT has + already been signaled. + @retval EFI_OUT_OF_RESOURCES There is not enough resource for the variable property set request. + +**/ +EFI_STATUS +EFIAPI +VarCheckVariablePropertySet ( + IN CHAR16 *Name, + IN EFI_GUID *Guid, + IN VAR_CHECK_VARIABLE_PROPERTY *VariableProperty + ); + +/** + Variable property get. + + @param[in] Name Pointer to the variable name. + @param[in] Guid Pointer to the vendor GUID. + @param[out] VariableProperty Pointer to the output variable property. + + @retval EFI_SUCCESS The property of variable specified by the Name and Guid was got successfully. + @retval EFI_INVALID_PARAMETER Name, Guid or VariableProperty is NULL, or Name is an empty string. + @retval EFI_NOT_FOUND The property of variable specified by the Name and Guid was not found. + +**/ +EFI_STATUS +EFIAPI +VarCheckVariablePropertyGet ( + IN CHAR16 *Name, + IN EFI_GUID *Guid, + OUT VAR_CHECK_VARIABLE_PROPERTY *VariableProperty + ); + +/** + Initialize variable quota. + +**/ +VOID +InitializeVariableQuota ( + VOID + ); + +extern VARIABLE_MODULE_GLOBAL *mVariableModuleGlobal; +extern EFI_FIRMWARE_VOLUME_HEADER *mNvFvHeaderCache; +extern VARIABLE_STORE_HEADER *mNvVariableCache; +extern VARIABLE_INFO_ENTRY *gVariableInfo; +extern BOOLEAN mEndOfDxe; +extern VAR_CHECK_REQUEST_SOURCE mRequestSource; + +extern AUTH_VAR_LIB_CONTEXT_OUT mAuthContextOut; + +/** + Finds variable in storage blocks of volatile and non-volatile storage areas. + + This code finds variable in storage blocks of volatile and non-volatile storage areas. + If VariableName is an empty string, then we just return the first + qualified variable without comparing VariableName and VendorGuid. + + @param[in] VariableName Name of the variable to be found. + @param[in] VendorGuid Variable vendor GUID to be found. + @param[out] AuthVariableInfo Pointer to AUTH_VARIABLE_INFO structure for + output of the variable found. + + @retval EFI_INVALID_PARAMETER If VariableName is not an empty string, + while VendorGuid is NULL. + @retval EFI_SUCCESS Variable successfully found. + @retval EFI_NOT_FOUND Variable not found + +**/ +EFI_STATUS +EFIAPI +VariableExLibFindVariable ( + IN CHAR16 *VariableName, + IN EFI_GUID *VendorGuid, + OUT AUTH_VARIABLE_INFO *AuthVariableInfo + ); + +/** + Finds next variable in storage blocks of volatile and non-volatile storage areas. + + This code finds next variable in storage blocks of volatile and non-volatile storage areas. + If VariableName is an empty string, then we just return the first + qualified variable without comparing VariableName and VendorGuid. + + @param[in] VariableName Name of the variable to be found. + @param[in] VendorGuid Variable vendor GUID to be found. + @param[out] AuthVariableInfo Pointer to AUTH_VARIABLE_INFO structure for + output of the next variable. + + @retval EFI_INVALID_PARAMETER If VariableName is not an empty string, + while VendorGuid is NULL. + @retval EFI_SUCCESS Variable successfully found. + @retval EFI_NOT_FOUND Variable not found + +**/ +EFI_STATUS +EFIAPI +VariableExLibFindNextVariable ( + IN CHAR16 *VariableName, + IN EFI_GUID *VendorGuid, + OUT AUTH_VARIABLE_INFO *AuthVariableInfo + ); + +/** + Update the variable region with Variable information. + + @param[in] AuthVariableInfo Pointer AUTH_VARIABLE_INFO structure for + input of the variable. + + @retval EFI_SUCCESS The update operation is success. + @retval EFI_INVALID_PARAMETER Invalid parameter. + @retval EFI_WRITE_PROTECTED Variable is write-protected. + @retval EFI_OUT_OF_RESOURCES There is not enough resource. + +**/ +EFI_STATUS +EFIAPI +VariableExLibUpdateVariable ( + IN AUTH_VARIABLE_INFO *AuthVariableInfo + ); + +/** + Get scratch buffer. + + @param[in, out] ScratchBufferSize Scratch buffer size. If input size is greater than + the maximum supported buffer size, this value contains + the maximum supported buffer size as output. + @param[out] ScratchBuffer Pointer to scratch buffer address. + + @retval EFI_SUCCESS Get scratch buffer successfully. + @retval EFI_UNSUPPORTED If input size is greater than the maximum supported buffer size. + +**/ +EFI_STATUS +EFIAPI +VariableExLibGetScratchBuffer ( + IN OUT UINTN *ScratchBufferSize, + OUT VOID **ScratchBuffer + ); + +/** + This function is to check if the remaining variable space is enough to set + all Variables from argument list successfully. The purpose of the check + is to keep the consistency of the Variables to be in variable storage. + + Note: Variables are assumed to be in same storage. + The set sequence of Variables will be same with the sequence of VariableEntry from argument list, + so follow the argument sequence to check the Variables. + + @param[in] Attributes Variable attributes for Variable entries. + @param ... The variable argument list with type VARIABLE_ENTRY_CONSISTENCY *. + A NULL terminates the list. The VariableSize of + VARIABLE_ENTRY_CONSISTENCY is the variable data size as input. + It will be changed to variable total size as output. + + @retval TRUE Have enough variable space to set the Variables successfully. + @retval FALSE No enough variable space to set the Variables successfully. + +**/ +BOOLEAN +EFIAPI +VariableExLibCheckRemainingSpaceForConsistency ( + IN UINT32 Attributes, + ... + ); + +/** + Return TRUE if at OS runtime. + + @retval TRUE If at OS runtime. + @retval FALSE If at boot time. + +**/ +BOOLEAN +EFIAPI +VariableExLibAtRuntime ( + VOID + ); + +#endif |