[edk2-devel] [RestJsonStructureDxe PATCH v3 2/3] RedfishPkg/RestJsonStructureDxe: EFI REST JSON Structure Protocol
Abner Chang
abner.chang at hpe.com
Thu Oct 15 15:33:24 UTC 2020
Implementation of EFI_REST_JSON_STRUCTURE_PROTOCOL, refer to UEFI spec
2.8 Section 29.7.3 EFI REST JSON Resource to C Structure Converter.
Signed-off-by: Abner Chang <abner.chang at hpe.com>
Cc: Jiaxin Wu <jiaxin.wu at intel.com>
Cc: Siyuan Fu <siyuan.fu at intel.com>
Cc: Fan Wang <fan.wang at intel.com>
Cc: Jiewen Yao <jiewen.yao at intel.com>
Cc: Nickle Wang <nickle.wang at hpe.com>
---
RedfishPkg/RedfishPkg.dsc | 11 +
.../RestJsonStructureDxe.c | 585 ++++++++++++++++++
.../RestJsonStructureDxe.inf | 40 ++
.../RestJsonStructureInternal.h | 33 +
4 files changed, 669 insertions(+)
create mode 100644 RedfishPkg/RestJsonStructureDxe/RestJsonStructureDxe.c
create mode 100644 RedfishPkg/RestJsonStructureDxe/RestJsonStructureDxe.inf
create mode 100644 RedfishPkg/RestJsonStructureDxe/RestJsonStructureInternal.h
diff --git a/RedfishPkg/RedfishPkg.dsc b/RedfishPkg/RedfishPkg.dsc
index 8acadddefc..f0c6740fac 100644
--- a/RedfishPkg/RedfishPkg.dsc
+++ b/RedfishPkg/RedfishPkg.dsc
@@ -38,3 +38,14 @@
DxeServicesTableLib|MdePkg/Library/DxeServicesTableLib/DxeServicesTableLib.inf
DxeServicesLib|MdePkg/Library/DxeServicesLib/DxeServicesLib.inf
ReportStatusCodeLib|MdeModulePkg/Library/DxeReportStatusCodeLib/DxeReportStatusCodeLib.inf
+
+[LibraryClasses.ARM, LibraryClasses.AARCH64]
+ #
+ # This library provides the instrinsic functions generated by a given compiler.
+ #
+ NULL|ArmPkg/Library/CompilerIntrinsicsLib/CompilerIntrinsicsLib.inf
+ NULL|MdePkg/Library/BaseStackCheckLib/BaseStackCheckLib.inf
+ ArmSoftFloatLib|ArmPkg/Library/ArmSoftFloatLib/ArmSoftFloatLib.inf
+
+[Components]
+ RedfishPkg/RestJsonStructureDxe/RestJsonStructureDxe.inf
diff --git a/RedfishPkg/RestJsonStructureDxe/RestJsonStructureDxe.c b/RedfishPkg/RestJsonStructureDxe/RestJsonStructureDxe.c
new file mode 100644
index 0000000000..03fbecf993
--- /dev/null
+++ b/RedfishPkg/RestJsonStructureDxe/RestJsonStructureDxe.c
@@ -0,0 +1,585 @@
+/** @file
+
+ The implementation of EFI REST Resource JSON to C structure convertor
+ Protocol.
+
+ (C) Copyright 2020 Hewlett Packard Enterprise Development LP<BR>
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Uefi.h>
+#include <Protocol/RestJsonStructure.h>
+#include "RestJsonStructureInternal.h"
+
+LIST_ENTRY mRestJsonStructureList;
+EFI_HANDLE mProtocolHandle;
+
+/**
+ This function registers Restful resource interpreter for the
+ specific schema.
+
+ @param[in] This This is the EFI_REST_JSON_STRUCTURE_PROTOCOL instance.
+ @param[in] JsonStructureSupported The type and version of REST JSON resource which this converter
+ supports.
+ @param[in] ToStructure The function to convert REST JSON resource to structure.
+ @param[in] ToJson The function to convert REST JSON structure to JSON in text format.
+ @param[in] DestroyStructure Destroy REST JSON structure returned in ToStructure() function.
+
+ @retval EFI_SUCCESS Register successfully.
+ @retval Others Fail to register.
+
+**/
+EFI_STATUS
+EFIAPI
+RestJsonStructureRegister (
+ IN EFI_REST_JSON_STRUCTURE_PROTOCOL *This,
+ IN EFI_REST_JSON_STRUCTURE_SUPPORTED *JsonStructureSupported,
+ IN EFI_REST_JSON_STRUCTURE_TO_STRUCTURE ToStructure,
+ IN EFI_REST_JSON_STRUCTURE_TO_JSON ToJson,
+ IN EFI_REST_JSON_STRUCTURE_DESTORY_STRUCTURE DestroyStructure
+)
+{
+ UINTN NumberOfNS;
+ UINTN Index;
+ LIST_ENTRY *ThisList;
+ REST_JSON_STRUCTURE_INSTANCE *Instance;
+ EFI_REST_JSON_RESOURCE_TYPE_IDENTIFIER *CloneSupportedInterpId;
+ EFI_REST_JSON_STRUCTURE_SUPPORTED *ThisSupportedInterp;
+
+ if (This == NULL ||
+ ToStructure == NULL ||
+ ToJson == NULL ||
+ DestroyStructure == NULL ||
+ JsonStructureSupported == NULL
+ ) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ //
+ // Check how many name space interpreter can interpret.
+ //
+ ThisList = &JsonStructureSupported->NextSupportedRsrcInterp;
+ NumberOfNS = 1;
+ while (TRUE) {
+ if (ThisList->ForwardLink == &JsonStructureSupported->NextSupportedRsrcInterp) {
+ break;
+ } else {
+ ThisList = ThisList->ForwardLink;
+ NumberOfNS ++;
+ }
+ };
+
+ Instance =
+ (REST_JSON_STRUCTURE_INSTANCE *)AllocateZeroPool (sizeof (REST_JSON_STRUCTURE_INSTANCE) + NumberOfNS * sizeof (EFI_REST_JSON_RESOURCE_TYPE_IDENTIFIER));
+ if (Instance == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+ InitializeListHead (&Instance->NextRestJsonStructureInstance);
+ Instance->NumberOfNameSpaceToConvert = NumberOfNS;
+ Instance->SupportedRsrcIndentifier = (EFI_REST_JSON_RESOURCE_TYPE_IDENTIFIER *)((REST_JSON_STRUCTURE_INSTANCE *)Instance + 1);
+ //
+ // Copy supported resource identifer interpreter.
+ //
+ CloneSupportedInterpId = Instance->SupportedRsrcIndentifier;
+ ThisSupportedInterp = JsonStructureSupported;
+ for (Index = 0; Index < NumberOfNS; Index ++) {
+ CopyMem ((VOID *)CloneSupportedInterpId, (VOID *)&ThisSupportedInterp->RestResourceInterp, sizeof (EFI_REST_JSON_RESOURCE_TYPE_IDENTIFIER));
+ ThisSupportedInterp = (EFI_REST_JSON_STRUCTURE_SUPPORTED *)ThisSupportedInterp->NextSupportedRsrcInterp.ForwardLink;
+ CloneSupportedInterpId ++;
+ }
+ Instance->JsonToStructure = ToStructure;
+ Instance->StructureToJson = ToJson;
+ Instance->DestroyStructure = DestroyStructure;
+ InsertTailList (&mRestJsonStructureList, &Instance->NextRestJsonStructureInstance);
+ return EFI_SUCCESS;
+}
+
+/**
+ This function check if this interpreter instance support the given namesapce.
+
+ @param[in] This EFI_REST_JSON_STRUCTURE_PROTOCOL instance.
+ @param[in] InterpreterInstance REST_JSON_STRUCTURE_INSTANCE
+ @param[in] RsrcTypeIdentifier Resource type identifier.
+ @param[in] ResourceRaw Given Restful resource.
+ @param[out] RestJSonHeader Property interpreted from given ResourceRaw.
+
+ @retval EFI_SUCCESS
+ @retval Others.
+
+**/
+EFI_STATUS
+InterpreterInstanceToStruct (
+ IN EFI_REST_JSON_STRUCTURE_PROTOCOL *This,
+ IN REST_JSON_STRUCTURE_INSTANCE *InterpreterInstance,
+ IN EFI_REST_JSON_RESOURCE_TYPE_IDENTIFIER *RsrcTypeIdentifier OPTIONAL,
+ IN CHAR8 *ResourceRaw,
+ OUT EFI_REST_JSON_STRUCTURE_HEADER **RestJSonHeader
+ )
+{
+ UINTN Index;
+ EFI_STATUS Status;
+ EFI_REST_JSON_RESOURCE_TYPE_IDENTIFIER *ThisSupportedRsrcTypeId;
+
+ if (This == NULL ||
+ InterpreterInstance == NULL ||
+ ResourceRaw == NULL ||
+ RestJSonHeader == NULL
+ ) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ Status = EFI_UNSUPPORTED;
+ if (RsrcTypeIdentifier == NULL) {
+ //
+ // No resource type identifier, send to intepreter anyway.
+ // Interpreter may recognize this resource.
+ //
+ Status = InterpreterInstance->JsonToStructure (
+ This,
+ NULL,
+ ResourceRaw,
+ RestJSonHeader
+ );
+ } else {
+ //
+ // Check if the namesapce and version is supported by this interpreter.
+ //
+ ThisSupportedRsrcTypeId = InterpreterInstance->SupportedRsrcIndentifier;
+ for (Index = 0; Index < InterpreterInstance->NumberOfNameSpaceToConvert; Index ++){
+ if (AsciiStrCmp (
+ RsrcTypeIdentifier->NameSpace.ResourceTypeName,
+ ThisSupportedRsrcTypeId->NameSpace.ResourceTypeName) == 0){
+ if ((RsrcTypeIdentifier->NameSpace.MajorVersion == NULL) &&
+ (RsrcTypeIdentifier->NameSpace.MinorVersion == NULL) &&
+ (RsrcTypeIdentifier->NameSpace.ErrataVersion == NULL)
+ ) {
+ //
+ // Don't check version of this resource type identifier.
+ //
+ Status = InterpreterInstance->JsonToStructure (
+ This,
+ RsrcTypeIdentifier,
+ ResourceRaw,
+ RestJSonHeader
+ );
+ break;
+ } else {
+ //
+ // Check version.
+ //
+ if ((AsciiStrCmp (
+ RsrcTypeIdentifier->NameSpace.MajorVersion,
+ ThisSupportedRsrcTypeId->NameSpace.MajorVersion) == 0) &&
+ (AsciiStrCmp (
+ RsrcTypeIdentifier->NameSpace.MinorVersion,
+ ThisSupportedRsrcTypeId->NameSpace.MinorVersion) == 0) &&
+ (AsciiStrCmp (
+ RsrcTypeIdentifier->NameSpace.ErrataVersion,
+ ThisSupportedRsrcTypeId->NameSpace.ErrataVersion) == 0)) {
+ Status = InterpreterInstance->JsonToStructure (
+ This,
+ RsrcTypeIdentifier,
+ ResourceRaw,
+ RestJSonHeader
+ );
+ break;
+ }
+ }
+ }
+ ThisSupportedRsrcTypeId ++;
+ }
+ }
+ return Status;
+}
+/**
+ This function converts JSON C structure to JSON property.
+
+ @param[in] This EFI_REST_JSON_STRUCTURE_PROTOCOL instance.
+ @param[in] InterpreterInstance REST_JSON_STRUCTURE_INSTANCE
+ @param[in] RestJSonHeader Resource type identifier.
+ @param[out] ResourceRaw Output in JSON text format.
+
+ @retval EFI_SUCCESS
+ @retval Others.
+
+**/
+EFI_STATUS
+InterpreterEfiStructToInstance (
+ IN EFI_REST_JSON_STRUCTURE_PROTOCOL *This,
+ IN REST_JSON_STRUCTURE_INSTANCE *InterpreterInstance,
+ IN EFI_REST_JSON_STRUCTURE_HEADER *RestJSonHeader,
+ OUT CHAR8 **ResourceRaw
+)
+{
+ UINTN Index;
+ EFI_STATUS Status;
+ EFI_REST_JSON_RESOURCE_TYPE_IDENTIFIER *ThisSupportedRsrcTypeId;
+ EFI_REST_JSON_RESOURCE_TYPE_IDENTIFIER *RsrcTypeIdentifier;
+
+ if (This == NULL ||
+ InterpreterInstance == NULL ||
+ RestJSonHeader == NULL ||
+ ResourceRaw == NULL
+ ) {
+ return EFI_INVALID_PARAMETER;
+ }
+ RsrcTypeIdentifier = &RestJSonHeader->JsonRsrcIdentifier;
+ if (RsrcTypeIdentifier == NULL ||
+ RsrcTypeIdentifier->NameSpace.ResourceTypeName == NULL ||
+ RsrcTypeIdentifier->NameSpace.MajorVersion == NULL ||
+ RsrcTypeIdentifier->NameSpace.MinorVersion == NULL ||
+ RsrcTypeIdentifier->NameSpace.ErrataVersion == NULL
+ ) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ //
+ // Check if the namesapce and version is supported by this interpreter.
+ //
+ Status = EFI_UNSUPPORTED;
+ ThisSupportedRsrcTypeId = InterpreterInstance->SupportedRsrcIndentifier;
+ for (Index = 0; Index < InterpreterInstance->NumberOfNameSpaceToConvert; Index ++){
+ if (AsciiStrCmp (
+ RsrcTypeIdentifier->NameSpace.ResourceTypeName,
+ ThisSupportedRsrcTypeId->NameSpace.ResourceTypeName) == 0){
+ //
+ // Check version.
+ //
+ if ((AsciiStrCmp (
+ RsrcTypeIdentifier->NameSpace.MajorVersion,
+ ThisSupportedRsrcTypeId->NameSpace.MajorVersion) == 0) &&
+ (AsciiStrCmp (
+ RsrcTypeIdentifier->NameSpace.MinorVersion,
+ ThisSupportedRsrcTypeId->NameSpace.MinorVersion) == 0) &&
+ (AsciiStrCmp (
+ RsrcTypeIdentifier->NameSpace.ErrataVersion,
+ ThisSupportedRsrcTypeId->NameSpace.ErrataVersion) == 0)) {
+ Status = InterpreterInstance->StructureToJson (
+ This,
+ RestJSonHeader,
+ ResourceRaw
+ );
+ break;
+ }
+ }
+ ThisSupportedRsrcTypeId ++;
+ }
+ return Status;
+}
+
+/**
+ This function destory REST property structure.
+
+ @param[in] This EFI_REST_JSON_STRUCTURE_PROTOCOL instance.
+ @param[in] InterpreterInstance REST_JSON_STRUCTURE_INSTANCE
+ @param[in] RestJSonHeader Property interpreted from given ResourceRaw.
+
+ @retval EFI_SUCCESS
+ @retval Others.
+
+**/
+EFI_STATUS
+InterpreterInstanceDestoryJsonStruct (
+ IN EFI_REST_JSON_STRUCTURE_PROTOCOL *This,
+ IN REST_JSON_STRUCTURE_INSTANCE *InterpreterInstance,
+ IN EFI_REST_JSON_STRUCTURE_HEADER *RestJSonHeader
+ )
+{
+ UINTN Index;
+ EFI_STATUS Status;
+ EFI_REST_JSON_RESOURCE_TYPE_IDENTIFIER *ThisSupportedRsrcTypeId;
+
+ if (This == NULL ||
+ InterpreterInstance == NULL ||
+ RestJSonHeader == NULL
+ ) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ Status = EFI_UNSUPPORTED;
+ //
+ // Check if the namesapce and version is supported by this interpreter.
+ //
+ ThisSupportedRsrcTypeId = InterpreterInstance->SupportedRsrcIndentifier;
+ for (Index = 0; Index < InterpreterInstance->NumberOfNameSpaceToConvert; Index ++){
+ if (AsciiStrCmp (
+ RestJSonHeader->JsonRsrcIdentifier.NameSpace.ResourceTypeName,
+ ThisSupportedRsrcTypeId->NameSpace.ResourceTypeName) == 0) {
+ if ((RestJSonHeader->JsonRsrcIdentifier.NameSpace.MajorVersion == NULL) &&
+ (RestJSonHeader->JsonRsrcIdentifier.NameSpace.MinorVersion == NULL) &&
+ (RestJSonHeader->JsonRsrcIdentifier.NameSpace.ErrataVersion == NULL)
+ ) {
+ //
+ // Don't check version of this resource type identifier.
+ //
+ Status = InterpreterInstance->DestroyStructure (
+ This,
+ RestJSonHeader
+ );
+ break;
+ } else {
+ //
+ // Check version.
+ //
+ if ((AsciiStrCmp (
+ RestJSonHeader->JsonRsrcIdentifier.NameSpace.MajorVersion,
+ ThisSupportedRsrcTypeId->NameSpace.MajorVersion) == 0) &&
+ (AsciiStrCmp (
+ RestJSonHeader->JsonRsrcIdentifier.NameSpace.MinorVersion,
+ ThisSupportedRsrcTypeId->NameSpace.MinorVersion) == 0) &&
+ (AsciiStrCmp (
+ RestJSonHeader->JsonRsrcIdentifier.NameSpace.ErrataVersion,
+ ThisSupportedRsrcTypeId->NameSpace.ErrataVersion) == 0)) {
+ Status = InterpreterInstance->DestroyStructure (
+ This,
+ RestJSonHeader
+ );
+ break;
+ }
+ }
+ }
+ ThisSupportedRsrcTypeId ++;
+ }
+ return Status;
+}
+
+/**
+ This function translates the given JSON text to JSON C Structure.
+
+ @param[in] This EFI_REST_JSON_STRUCTURE_PROTOCOL instance.
+ @param[in] RsrcTypeIdentifier Resource type identifier.
+ @param[in] ResourceJsonText Given Restful resource.
+ @param[out] JsonStructure Property interpreted from given ResourceRaw.
+
+ @retval EFI_SUCCESS
+ @retval Others.
+
+**/
+EFI_STATUS
+EFIAPI
+RestJsonStructureToStruct (
+ IN EFI_REST_JSON_STRUCTURE_PROTOCOL *This,
+ IN EFI_REST_JSON_RESOURCE_TYPE_IDENTIFIER *RsrcTypeIdentifier OPTIONAL,
+ IN CHAR8 *ResourceJsonText,
+ OUT EFI_REST_JSON_STRUCTURE_HEADER **JsonStructure
+)
+{
+ EFI_STATUS Status;
+ REST_JSON_STRUCTURE_INSTANCE *Instance;
+
+ if (This == NULL ||
+ ResourceJsonText == NULL ||
+ JsonStructure == NULL
+ ) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (IsListEmpty (&mRestJsonStructureList)) {
+ return EFI_UNSUPPORTED;
+ }
+ Status = EFI_SUCCESS;
+ Instance = (REST_JSON_STRUCTURE_INSTANCE *)GetFirstNode (&mRestJsonStructureList);
+ while (TRUE) {
+ Status = InterpreterInstanceToStruct (
+ This,
+ Instance,
+ RsrcTypeIdentifier,
+ ResourceJsonText,
+ JsonStructure
+ );
+ if (!EFI_ERROR (Status)) {
+ break;
+ }
+ if (IsNodeAtEnd(&mRestJsonStructureList, &Instance->NextRestJsonStructureInstance)) {
+ Status = EFI_UNSUPPORTED;
+ break;
+ }
+ Instance = (REST_JSON_STRUCTURE_INSTANCE *)GetNextNode (&mRestJsonStructureList, &Instance->NextRestJsonStructureInstance);
+ };
+ return Status;
+}
+
+/**
+ This function destory REST property EFI structure which returned in
+ JsonToStructure().
+
+ @param[in] This EFI_REST_JSON_STRUCTURE_PROTOCOL instance.
+ @param[in] RestJSonHeader Property to destory.
+
+ @retval EFI_SUCCESS
+ @retval Others
+
+**/
+EFI_STATUS
+EFIAPI
+RestJsonStructureDestroyStruct (
+ IN EFI_REST_JSON_STRUCTURE_PROTOCOL *This,
+ IN EFI_REST_JSON_STRUCTURE_HEADER *RestJSonHeader
+)
+{
+ EFI_STATUS Status;
+ REST_JSON_STRUCTURE_INSTANCE *Instance;
+
+ if (This == NULL || RestJSonHeader == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (IsListEmpty (&mRestJsonStructureList)) {
+ return EFI_UNSUPPORTED;
+ }
+ Status = EFI_SUCCESS;
+ Instance = (REST_JSON_STRUCTURE_INSTANCE *)GetFirstNode (&mRestJsonStructureList);
+ while (TRUE) {
+ Status = InterpreterInstanceDestoryJsonStruct (
+ This,
+ Instance,
+ RestJSonHeader
+ );
+ if (!EFI_ERROR (Status)) {
+ break;
+ }
+ if (IsNodeAtEnd(&mRestJsonStructureList, &Instance->NextRestJsonStructureInstance)) {
+ Status = EFI_UNSUPPORTED;
+ break;
+ }
+ Instance = (REST_JSON_STRUCTURE_INSTANCE *)GetNextNode (&mRestJsonStructureList, &Instance->NextRestJsonStructureInstance);
+ };
+ return Status;
+}
+
+/**
+ This function translates the given JSON C Structure to JSON text.
+
+ @param[in] This EFI_REST_JSON_STRUCTURE_PROTOCOL instance.
+ @param[in] RestJSonHeader Given Restful resource.
+ @param[out] ResourceRaw Resource in RESTfuls service oriented.
+
+ @retval EFI_SUCCESS
+ @retval Others Fail to remove the entry
+
+**/
+EFI_STATUS
+EFIAPI
+RestJsonStructureToJson (
+ IN EFI_REST_JSON_STRUCTURE_PROTOCOL *This,
+ IN EFI_REST_JSON_STRUCTURE_HEADER *RestJSonHeader,
+ OUT CHAR8 **ResourceRaw
+)
+{
+ EFI_STATUS Status;
+ REST_JSON_STRUCTURE_INSTANCE *Instance;
+
+ if (This == NULL || RestJSonHeader == NULL || ResourceRaw == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ if (IsListEmpty (&mRestJsonStructureList)) {
+ return EFI_UNSUPPORTED;
+ }
+ Status = EFI_SUCCESS;
+ Instance = (REST_JSON_STRUCTURE_INSTANCE *)GetFirstNode (&mRestJsonStructureList);
+ while (TRUE) {
+ Status = InterpreterEfiStructToInstance (
+ This,
+ Instance,
+ RestJSonHeader,
+ ResourceRaw
+ );
+ if (!EFI_ERROR (Status)) {
+ break;
+ }
+ if (IsNodeAtEnd(&mRestJsonStructureList, &Instance->NextRestJsonStructureInstance)) {
+ Status = EFI_UNSUPPORTED;
+ break;
+ }
+ Instance = (REST_JSON_STRUCTURE_INSTANCE *)GetNextNode (&mRestJsonStructureList, &Instance->NextRestJsonStructureInstance);
+ };
+ return Status;
+}
+
+EFI_REST_JSON_STRUCTURE_PROTOCOL mRestJsonStructureProtocol = {
+ RestJsonStructureRegister,
+ RestJsonStructureToStruct,
+ RestJsonStructureToJson,
+ RestJsonStructureDestroyStruct
+};
+
+/**
+ This is the declaration of an EFI image entry point.
+
+ @param ImageHandle The firmware allocated handle for the UEFI image.
+ @param SystemTable A pointer to the EFI System Table.
+
+ @retval EFI_SUCCESS The operation completed successfully.
+ @retval Others An unexpected error occurred.
+**/
+EFI_STATUS
+EFIAPI
+RestJsonStructureEntryPoint (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ EFI_STATUS Status;
+
+ InitializeListHead (&mRestJsonStructureList);
+ //
+ // Install the Restful Resource Interpreter Protocol.
+ //
+ mProtocolHandle = NULL;
+ Status = gBS->InstallProtocolInterface (
+ &mProtocolHandle,
+ &gEfiRestJsonStructureProtocolGuid,
+ EFI_NATIVE_INTERFACE,
+ (VOID *)&mRestJsonStructureProtocol
+ );
+ return Status;
+}
+
+/**
+ This is the unload handle for Redfish discover module.
+
+ Disconnect the driver specified by ImageHandle from all the devices in the handle database.
+ Uninstall all the protocols installed in the driver entry point.
+
+ @param[in] ImageHandle The drivers' driver image.
+
+ @retval EFI_SUCCESS The image is unloaded.
+ @retval Others Failed to unload the image.
+
+**/
+EFI_STATUS
+EFIAPI
+RestJsonStructureUnload (
+ IN EFI_HANDLE ImageHandle
+ )
+{
+ EFI_STATUS Status;
+ REST_JSON_STRUCTURE_INSTANCE *Instance;
+ REST_JSON_STRUCTURE_INSTANCE *NextInstance;
+
+ if (IsListEmpty (&mRestJsonStructureList)) {
+ return EFI_SUCCESS;
+ }
+ //
+ // Free memory of REST_JSON_STRUCTURE_INSTANCE instance.
+ //
+ Instance = (REST_JSON_STRUCTURE_INSTANCE *)GetFirstNode (&mRestJsonStructureList);
+ do {
+ NextInstance = NULL;
+ if (!IsNodeAtEnd(&mRestJsonStructureList, &Instance->NextRestJsonStructureInstance)) {
+ NextInstance = (REST_JSON_STRUCTURE_INSTANCE *)GetNextNode (&mRestJsonStructureList, &Instance->NextRestJsonStructureInstance);
+ }
+ FreePool ((VOID *)Instance);
+ Instance = NextInstance;
+ } while (Instance != NULL);
+
+ Status = gBS->UninstallProtocolInterface (
+ mProtocolHandle,
+ &gEfiRestJsonStructureProtocolGuid,
+ (VOID *)&mRestJsonStructureProtocol
+ );
+ return Status;
+}
diff --git a/RedfishPkg/RestJsonStructureDxe/RestJsonStructureDxe.inf b/RedfishPkg/RestJsonStructureDxe/RestJsonStructureDxe.inf
new file mode 100644
index 0000000000..2ab1e3bc45
--- /dev/null
+++ b/RedfishPkg/RestJsonStructureDxe/RestJsonStructureDxe.inf
@@ -0,0 +1,40 @@
+## @file
+# Implementation of EFI REST JSON Structure Protocol.
+#
+# (C) Copyright 2020 Hewlett Packard Enterprise Development LP<BR>
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+[Defines]
+ INF_VERSION = 0x00010005
+ BASE_NAME = RestJsonStructureDxe
+ FILE_GUID = 83FAAFBF-FC4B-469F-892A-798E66A6F50A
+ MODULE_TYPE = DXE_DRIVER
+ VERSION_STRING = 1.0
+ ENTRY_POINT = RestJsonStructureEntryPoint
+ UNLOAD_IMAGE = RestJsonStructureUnload
+
+[Packages]
+ MdePkg/MdePkg.dec
+ MdeModulePkg/MdeModulePkg.dec
+ RedfishPkg/RedfishPkg.dec
+
+[Sources]
+ RestJsonStructureDxe.c
+ RestJsonStructureInternal.h
+
+[LibraryClasses]
+ BaseLib
+ BaseMemoryLib
+ MemoryAllocationLib
+ UefiBootServicesTableLib
+ UefiDriverEntryPoint
+ UefiLib
+
+[Protocols]
+ gEfiRestJsonStructureProtocolGuid ## Producing
+
+[Depex]
+ TRUE
+
diff --git a/RedfishPkg/RestJsonStructureDxe/RestJsonStructureInternal.h b/RedfishPkg/RestJsonStructureDxe/RestJsonStructureInternal.h
new file mode 100644
index 0000000000..e8a3408404
--- /dev/null
+++ b/RedfishPkg/RestJsonStructureDxe/RestJsonStructureInternal.h
@@ -0,0 +1,33 @@
+/** @file
+ The internal definitions of EFI REST Resource JSON to C structure convertor
+ Protocol.
+
+ (C) Copyright 2020 Hewlett Packard Enterprise Development LP<BR>
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef EFI_REST_JSON_STRUCTURE_INTERNAL_H_
+#define EFI_REST_JSON_STRUCTURE_INTERNAL_H_
+
+#include <Library/BaseLib.h>
+#include <Library/UefiLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <Library/UefiDriverEntryPoint.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/MemoryAllocationLib.h>
+
+///
+/// Internal structure to maintain the information of JSON to
+/// C structure convertor.
+///
+typedef struct _REST_JSON_STRUCTURE_INSTANCE {
+ LIST_ENTRY NextRestJsonStructureInstance; ///< Next convertor instance
+ UINTN NumberOfNameSpaceToConvert; ///< Number of resource type this convertor supports.
+ EFI_REST_JSON_RESOURCE_TYPE_IDENTIFIER *SupportedRsrcIndentifier; ///< The resource type linklist
+ EFI_REST_JSON_STRUCTURE_TO_STRUCTURE JsonToStructure; ///< JSON to C structure function
+ EFI_REST_JSON_STRUCTURE_TO_JSON StructureToJson; ///< C structure to JSON function
+ EFI_REST_JSON_STRUCTURE_DESTORY_STRUCTURE DestroyStructure; ///< Destory C struture function.
+} REST_JSON_STRUCTURE_INSTANCE;
+#endif
--
2.17.1
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