If setting variable in Runtime and there has been a same GUID and name variable existed in system without RT attribute, return EFI_WRITE_PROTECTED.

Signed-off-by: lzeng14
Reviewed-by: tye

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13156 6f19259b-4bc3-4df7-8a09-765794883524

1 files changed, 28 insertions, 14 deletions

diff --git a/MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.c b/MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.c
index 5aa6e32..94ec660 100644
--- a/MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.c
+++ b/MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.c
@@ -3,7 +3,7 @@
   The common variable operation routines shared by DXE_RINTIME variable 

   module and DXE_SMM variable module.

   

-Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>

+Copyright (c) 2006 - 2012, 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        

@@ -718,6 +718,8 @@ Reclaim (
 

   @param  VariableName        Name of the variable to be found

   @param  VendorGuid          Vendor GUID to be found.

+  @param  IgnoreRtCheck       Ignore EFI_VARIABLE_RUNTIME_ACCESS attribute

+                              check at runtime when searching variable.

   @param  PtrTrack            Variable Track Pointer structure that contains Variable Information.

 

   @retval  EFI_SUCCESS            Variable found successfully

@@ -727,6 +729,7 @@ EFI_STATUS
 FindVariableEx (

   IN     CHAR16                  *VariableName,

   IN     EFI_GUID                *VendorGuid,

+  IN     BOOLEAN                 IgnoreRtCheck,

   IN OUT VARIABLE_POINTER_TRACK  *PtrTrack

   )

 {

@@ -745,7 +748,7 @@ FindVariableEx (
     if (PtrTrack->CurrPtr->State == VAR_ADDED || 

         PtrTrack->CurrPtr->State == (VAR_IN_DELETED_TRANSITION & VAR_ADDED)

        ) {

-      if (!AtRuntime () || ((PtrTrack->CurrPtr->Attributes & EFI_VARIABLE_RUNTIME_ACCESS) != 0)) {

+      if (IgnoreRtCheck || !AtRuntime () || ((PtrTrack->CurrPtr->Attributes & EFI_VARIABLE_RUNTIME_ACCESS) != 0)) {

         if (VariableName[0] == 0) {

           if (PtrTrack->CurrPtr->State == (VAR_IN_DELETED_TRANSITION & VAR_ADDED)) {

             InDeletedVariable   = PtrTrack->CurrPtr;

@@ -781,7 +784,9 @@ FindVariableEx (
   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.

-  Otherwise, VariableName and VendorGuid are compared.

+  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  VariableName                Name of the variable to be found.

   @param  VendorGuid                  Vendor GUID to be found.

@@ -790,6 +795,8 @@ FindVariableEx (
   @param  Global                      Pointer to VARIABLE_GLOBAL structure, including

                                       base of volatile variable storage area, base of

                                       NV variable storage area, and a lock.

+  @param  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.

@@ -802,7 +809,8 @@ FindVariable (
   IN  CHAR16                  *VariableName,

   IN  EFI_GUID                *VendorGuid,

   OUT VARIABLE_POINTER_TRACK  *PtrTrack,

-  IN  VARIABLE_GLOBAL         *Global

+  IN  VARIABLE_GLOBAL         *Global,

+  IN  BOOLEAN                 IgnoreRtCheck

   )

 {

   EFI_STATUS              Status;

@@ -834,7 +842,7 @@ FindVariable (
     PtrTrack->EndPtr   = GetEndPointer   (VariableStoreHeader[Type]);

     PtrTrack->Volatile = (BOOLEAN) (Type == VariableStoreTypeVolatile);

 

-    Status = FindVariableEx (VariableName, VendorGuid, PtrTrack);

+    Status = FindVariableEx (VariableName, VendorGuid, IgnoreRtCheck, PtrTrack);

     if (!EFI_ERROR (Status)) {

       return Status;

     }

@@ -1234,7 +1242,7 @@ AutoUpdateLangVariable (
     // Update Lang if PlatformLang is already set

     // Update PlatformLang if Lang is already set

     //

-    Status = FindVariable (L"PlatformLang", &gEfiGlobalVariableGuid, &Variable, &mVariableModuleGlobal->VariableGlobal);

+    Status = FindVariable (L"PlatformLang", &gEfiGlobalVariableGuid, &Variable, &mVariableModuleGlobal->VariableGlobal, FALSE);

     if (!EFI_ERROR (Status)) {

       //

       // Update Lang

@@ -1243,7 +1251,7 @@ AutoUpdateLangVariable (
       Data         = GetVariableDataPtr (Variable.CurrPtr);

       DataSize     = Variable.CurrPtr->DataSize;

     } else {

-      Status = FindVariable (L"Lang", &gEfiGlobalVariableGuid, &Variable, &mVariableModuleGlobal->VariableGlobal);

+      Status = FindVariable (L"Lang", &gEfiGlobalVariableGuid, &Variable, &mVariableModuleGlobal->VariableGlobal, FALSE);

       if (!EFI_ERROR (Status)) {

         //

         // Update PlatformLang

@@ -1288,7 +1296,7 @@ AutoUpdateLangVariable (
         //

         // Successfully convert PlatformLang to Lang, and set the BestLang value into Lang variable simultaneously.

         //

-        FindVariable (L"Lang", &gEfiGlobalVariableGuid, &Variable, (VARIABLE_GLOBAL *)mVariableModuleGlobal);

+        FindVariable (L"Lang", &gEfiGlobalVariableGuid, &Variable, (VARIABLE_GLOBAL *)mVariableModuleGlobal, FALSE);

 

         Status = UpdateVariable (L"Lang", &gEfiGlobalVariableGuid, BestLang,

                                  ISO_639_2_ENTRY_SIZE + 1, Attributes, &Variable);

@@ -1322,7 +1330,7 @@ AutoUpdateLangVariable (
         //

         // Successfully convert Lang to PlatformLang, and set the BestPlatformLang value into PlatformLang variable simultaneously.

         //

-        FindVariable (L"PlatformLang", &gEfiGlobalVariableGuid, &Variable, &mVariableModuleGlobal->VariableGlobal);

+        FindVariable (L"PlatformLang", &gEfiGlobalVariableGuid, &Variable, &mVariableModuleGlobal->VariableGlobal, FALSE);

 

         Status = UpdateVariable (L"PlatformLang", &gEfiGlobalVariableGuid, BestPlatformLang, 

                                  AsciiStrSize (BestPlatformLang), Attributes, &Variable);

@@ -1418,9 +1426,9 @@ UpdateVariable (
         goto Done;

       }

       //

-      // Only variable that have NV attributes can be updated/deleted in Runtime.

+      // Only variable that have NV|RT attributes can be updated/deleted in Runtime.

       //

-      if ((Variable->CurrPtr->Attributes & EFI_VARIABLE_NON_VOLATILE) == 0) {

+      if (((Variable->CurrPtr->Attributes & EFI_VARIABLE_RUNTIME_ACCESS) == 0) || ((Variable->CurrPtr->Attributes & EFI_VARIABLE_NON_VOLATILE) == 0)) {

         Status = EFI_INVALID_PARAMETER;

         goto Done;      

       }

@@ -1789,7 +1797,7 @@ VariableServiceGetVariable (
 

   AcquireLockOnlyAtBootTime(&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);

   

-  Status = FindVariable (VariableName, VendorGuid, &Variable, &mVariableModuleGlobal->VariableGlobal);

+  Status = FindVariable (VariableName, VendorGuid, &Variable, &mVariableModuleGlobal->VariableGlobal, FALSE);

   if (Variable.CurrPtr == NULL || EFI_ERROR (Status)) {

     goto Done;

   }

@@ -1864,7 +1872,7 @@ VariableServiceGetNextVariableName (
 

   AcquireLockOnlyAtBootTime(&mVariableModuleGlobal->VariableGlobal.VariableServicesLock);

 

-  Status = FindVariable (VariableName, VendorGuid, &Variable, &mVariableModuleGlobal->VariableGlobal);

+  Status = FindVariable (VariableName, VendorGuid, &Variable, &mVariableModuleGlobal->VariableGlobal, FALSE);

   if (Variable.CurrPtr == NULL || EFI_ERROR (Status)) {

     goto Done;

   }

@@ -1941,6 +1949,7 @@ VariableServiceGetNextVariableName (
           Status = FindVariableEx (

                      GetVariableNamePtr (Variable.CurrPtr),

                      &Variable.CurrPtr->VendorGuid,

+                     FALSE,

                      &VariableInHob

                      );

           if (!EFI_ERROR (Status)) {

@@ -2079,7 +2088,12 @@ VariableServiceSetVariable (
   //

   // Check whether the input variable is already existed.

   //

-  FindVariable (VariableName, VendorGuid, &Variable, &mVariableModuleGlobal->VariableGlobal);

+  Status = FindVariable (VariableName, VendorGuid, &Variable, &mVariableModuleGlobal->VariableGlobal, TRUE);

+  if (!EFI_ERROR (Status)) {

+    if (((Variable.CurrPtr->Attributes & EFI_VARIABLE_RUNTIME_ACCESS) == 0) && AtRuntime ()) {

+      return EFI_WRITE_PROTECTED;

+    }

+  }

 

   //

   // Hook the operation of setting PlatformLangCodes/PlatformLang and LangCodes/Lang.