diff options
Diffstat (limited to 'Core/MdeModulePkg/Universal/Variable/RuntimeDxe/VarCheck.c')
| -rw-r--r-- | Core/MdeModulePkg/Universal/Variable/RuntimeDxe/VarCheck.c | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/Core/MdeModulePkg/Universal/Variable/RuntimeDxe/VarCheck.c b/Core/MdeModulePkg/Universal/Variable/RuntimeDxe/VarCheck.c new file mode 100644 index 0000000000..ad56a9f5be --- /dev/null +++ b/Core/MdeModulePkg/Universal/Variable/RuntimeDxe/VarCheck.c @@ -0,0 +1,155 @@ +/** @file
+ Implementation functions and structures for var check protocol
+ and variable lock protocol based on VarCheckLib.
+
+Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
+This program and the accompanying materials
+are licensed and made available under the terms and conditions of the BSD License
+which accompanies this distribution. The full text of the license may be found at
+http://opensource.org/licenses/bsd-license.php
+
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include "Variable.h"
+
+/**
+ Mark a variable that will become read-only after leaving the DXE phase of execution.
+ Write request coming from SMM environment through EFI_SMM_VARIABLE_PROTOCOL is allowed.
+
+ @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
+ )
+{
+ EFI_STATUS Status;
+ VAR_CHECK_VARIABLE_PROPERTY Property;
+
+ AcquireLockOnlyAtBootTime (&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);
+
+ Status = VarCheckLibVariablePropertyGet (VariableName, VendorGuid, &Property);
+ if (!EFI_ERROR (Status)) {
+ Property.Property |= VAR_CHECK_VARIABLE_PROPERTY_READ_ONLY;
+ } else {
+ Property.Revision = VAR_CHECK_VARIABLE_PROPERTY_REVISION;
+ Property.Property = VAR_CHECK_VARIABLE_PROPERTY_READ_ONLY;
+ Property.Attributes = 0;
+ Property.MinSize = 1;
+ Property.MaxSize = MAX_UINTN;
+ }
+ Status = VarCheckLibVariablePropertySet (VariableName, VendorGuid, &Property);
+
+ DEBUG ((EFI_D_INFO, "[Variable] Lock: %g:%s %r\n", VendorGuid, VariableName, Status));
+
+ ReleaseLockOnlyAtBootTime (&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);
+
+ return Status;
+}
+
+/**
+ 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
+ )
+{
+ EFI_STATUS Status;
+
+ AcquireLockOnlyAtBootTime (&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);
+ Status = VarCheckLibRegisterSetVariableCheckHandler (Handler);
+ ReleaseLockOnlyAtBootTime (&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);
+
+ return Status;
+}
+
+/**
+ 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
+ )
+{
+ EFI_STATUS Status;
+
+ AcquireLockOnlyAtBootTime (&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);
+ Status = VarCheckLibVariablePropertySet (Name, Guid, VariableProperty);
+ ReleaseLockOnlyAtBootTime (&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);
+
+ return Status;
+}
+
+/**
+ 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
+ )
+{
+ EFI_STATUS Status;
+
+ AcquireLockOnlyAtBootTime (&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);
+ Status = VarCheckLibVariablePropertyGet (Name, Guid, VariableProperty);
+ ReleaseLockOnlyAtBootTime (&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);
+
+ return Status;
+}
+
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