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/** @file
Serialize & Deserialize UEFI Variables
Copyright (c) 2011, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#ifndef __SERIALIZE_VARIABLES_LIB__
#define __SERIALIZE_VARIABLES_LIB__
/**
Callback function for each variable
@param[in] Context - Context as sent to the iteration function
@param[in] VariableName - Refer to RuntimeServices GetNextVariableName
@param[in] VendorGuid - Refer to RuntimeServices GetNextVariableName
@param[in] Attributes - Refer to RuntimeServices GetVariable
@param[in] DataSize - Refer to RuntimeServices GetVariable
@param[in] Data - Refer to RuntimeServices GetVariable
@retval RETURN_SUCCESS Continue iterating through the variables
@return Any RETURN_ERROR Stop iterating through the variables
**/
typedef
RETURN_STATUS
(EFIAPI *VARIABLE_SERIALIZATION_ITERATION_CALLBACK)(
IN VOID *Context,
IN CHAR16 *VariableName,
IN EFI_GUID *VendorGuid,
IN UINT32 Attributes,
IN UINTN DataSize,
IN VOID *Data
);
/**
Creates a new variable serialization instance
@param[out] Handle - Handle for a variable serialization instance
@retval RETURN_SUCCESS - The variable serialization instance was
successfully created.
@retval RETURN_OUT_OF_RESOURCES - There we not enough resources to
create the variable serialization instance.
**/
RETURN_STATUS
EFIAPI
SerializeVariablesNewInstance (
OUT EFI_HANDLE *Handle
);
/**
Free memory associated with a variable serialization instance
@param[in] Handle - Handle for a variable serialization instance
@retval RETURN_SUCCESS - The variable serialization instance was
successfully freed.
@retval RETURN_INVALID_PARAMETER - Handle was not a valid
variable serialization instance.
**/
RETURN_STATUS
EFIAPI
SerializeVariablesFreeInstance (
IN EFI_HANDLE Handle
);
/**
Creates a new variable serialization instance using the given
binary representation of the variables to fill the new instance
@param[out] Handle - Handle for a variable serialization instance
@param[in] Buffer - A buffer with the serialized representation
of the variables. Must be the same format as produced
by SerializeVariablesToBuffer.
@param[in] Size - This is the size of the binary representation
of the variables.
@retval RETURN_SUCCESS - The binary representation was successfully
imported into a new variable serialization instance
@retval RETURN_OUT_OF_RESOURCES - There we not enough resources to
create the new variable serialization instance
**/
RETURN_STATUS
EFIAPI
SerializeVariablesNewInstanceFromBuffer (
OUT EFI_HANDLE *Handle,
IN VOID *Buffer,
IN UINTN Size
);
/**
Iterates all variables found with RuntimeServices GetNextVariableName
@param[in] CallbackFunction - Function called for each variable instance
@param[in] Context - Passed to each call of CallbackFunction
@retval RETURN_SUCCESS - All variables were iterated without the
CallbackFunction returning an error
@retval RETURN_OUT_OF_RESOURCES - There we not enough resources to
iterate through the variables
@return Any of RETURN_ERROR indicates an error reading the variable
or an error was returned from CallbackFunction
**/
RETURN_STATUS
EFIAPI
SerializeVariablesIterateSystemVariables (
IN VARIABLE_SERIALIZATION_ITERATION_CALLBACK CallbackFunction,
IN VOID *Context
);
/**
Iterates all variables found in the variable serialization instance
@param[in] Handle - Handle for a variable serialization instance
@param[in] CallbackFunction - Function called for each variable instance
@param[in] Context - Passed to each call of CallbackFunction
@retval RETURN_SUCCESS - All variables were iterated without the
CallbackFunction returning an error
@retval RETURN_OUT_OF_RESOURCES - There we not enough resources to
iterate through the variables
@return Any of RETURN_ERROR indicates an error reading the variable
or an error was returned from CallbackFunction
**/
RETURN_STATUS
EFIAPI
SerializeVariablesIterateInstanceVariables (
IN EFI_HANDLE Handle,
IN VARIABLE_SERIALIZATION_ITERATION_CALLBACK CallbackFunction,
IN VOID *Context
);
/**
Sets all variables found in the variable serialization instance
@param[in] Handle - Handle for a variable serialization instance
@retval RETURN_SUCCESS - All variables were set successfully
@retval RETURN_OUT_OF_RESOURCES - There we not enough resources to
set all the variables
@return Any of RETURN_ERROR indicates an error reading the variables
or in attempting to set a variable
**/
RETURN_STATUS
EFIAPI
SerializeVariablesSetSerializedVariables (
IN EFI_HANDLE Handle
);
/**
Adds a variable to the variable serialization instance
@param[in] Handle - Handle for a variable serialization instance
@param[in] VariableName - Refer to RuntimeServices GetVariable
@param[in] VendorGuid - Refer to RuntimeServices GetVariable
@param[in] Attributes - Refer to RuntimeServices GetVariable
@param[in] DataSize - Refer to RuntimeServices GetVariable
@param[in] Data - Refer to RuntimeServices GetVariable
@retval RETURN_SUCCESS - All variables were set successfully
@retval RETURN_OUT_OF_RESOURCES - There we not enough resources to
add the variable
**/
RETURN_STATUS
EFIAPI
SerializeVariablesAddVariable (
IN EFI_HANDLE Handle,
IN CHAR16 *VariableName,
IN EFI_GUID *VendorGuid,
IN UINT32 Attributes,
IN UINTN DataSize,
IN VOID *Data
);
/**
Serializes the variables known to this instance into the
provided buffer.
@param[in] Handle - Handle for a variable serialization instance
@param[out] Buffer - A buffer to store the binary representation
of the variables.
@param[in,out] Size - On input this is the size of the buffer.
On output this is the size of the binary representation
of the variables.
@retval RETURN_SUCCESS - The binary representation was successfully
completed and returned in the buffer.
@retval RETURN_OUT_OF_RESOURCES - There we not enough resources to
save the variables to the buffer.
@retval RETURN_INVALID_PARAMETER - Handle was not a valid
variable serialization instance or
Size or Buffer were NULL.
**/
RETURN_STATUS
EFIAPI
SerializeVariablesToBuffer (
IN EFI_HANDLE Handle,
OUT VOID *Buffer,
IN OUT UINTN *Size
);
#endif
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